A kind of secondary double-cylinder of high refrigeration performance[technical field]
The present invention relates to the compressor of various working conditional operation, particularly relate to a kind of secondary double-cylinder of high refrigeration performance.
[background technique]
Two stage compressor, by two second compression, improves compression ratio, is very suitable for the low-temperature heating of heat pump water heater under high pressure ratio condition, be equally also suitable for the air-conditioning high-temperature refrigeration under high pressure ratio condition.But under specified cooling condition, system needs compressor low power consumption, and low compression ratio improves Energy Efficiency Ratio, but two-stage compression creates high pressure ratio, make compressor power consumption high, unfavorable to specified refrigeration; In addition on the one hand, two stage compressor second cylinder air-breathing is vented by the first cylinder and provides, the intermittence (120 degree of scope exhausts of only having an appointment) of air-breathing continuity (360 degree all in air-breathing) correspondence exhaust, cause the second cylinder air-breathing unsaturated, volumetric efficiency is low, it is high that air-conditioning system reflects power consumption, the phenomenon that Energy Efficiency Ratio is low.
[summary of the invention]
The invention provides a kind of structure simple, control convenient, changeable is as required single cylinder single stage compression or the work of twin-tub single stage compression, effectively can reduce power consumption, meet the performance requirement of the specified refrigeration of High-energy-efficienair air conditioner, under other operating modes, the secondary double-cylinder of two stage compressor performance under low-temperature heating or high-temperature refrigeration can be played again.
In order to realize foregoing invention object, the technical solution used in the present invention is:
A kind of secondary double-cylinder of high refrigeration performance, comprise motor stator, rotor, bent axle, upper roller, lower roller, upper flange, upper cylinder, dividing plate, lower cylinder, lower flange, lower flange cover plate and liquor separator, bent axle is equipped with the upper and lower roller with upper and lower cylinder inner cavity cooperating, lower flange cover plate lid is located at the lower end of lower flange and forms lower cylinder exhaust cavity, and liquor separator is provided with the sucking pipe be communicated with lower cylinder; Upper cylinder, dividing plate, lower cylinder and lower flange offer the two-stage compression passage being vented cavity conducting with lower cylinder, described upper flange offers the leakage port be communicated with upper cylinder active chamber, described upper flange is or/and upper cylinder is provided with the pressure relief device controlling leakage port folding; Described pressure relief device comprises the upside that the is fixed on upper flange valve block for shutoff leakage port, plunger hole is offered immediately below the valve block at the corresponding leakage port place of axial walls of upper cylinder, plunger hole is provided with one and can passes upper flange jack-up valve block and control the inverse-T-shaped plunger of the through exhaust of leakage port, plunger hole bottom is provided with valve block on the inverse-T-shaped plunger of a promotion and upper flange and the inconsistent Compress Spring of baffle plate, and upper cylinder is provided with the control valve that plunger hole is communicated with high pressure side or the low voltage side selectivity of compressor.
The upper end of described inverse-T-shaped plunger is step-like projection, and the axial correspondence of upper flange leakage port side is provided with the through hole coordinated with projection.
The lower end of described inverse-T-shaped plunger offers the groove being connected with Compress Spring and coordinating.
The upside of described upper flange is also provided with carries out spacing baffle plate to the valve block of leakage port, and the other end of valve block and the corresponding leakage port of baffle plate is fixed by screws on upper flange.
The invention has the beneficial effects as follows:
The plunger that the present invention is controlled in upper cylinder plunger hole by control valve moves, when control valve is pressurized gas, plunger in plunger hole moves, by the valve block on the projection jack-up upper flange of plunger top in baffle plate place, the exhaust passage of upper cylinder is changed, directly by the leakage port on upper flange, upper cylinder is directly vented and arrives upper baffler, after the air-breathing compression of lower cylinder, directly be vented after upper cylinder, in this process, upper cylinder does not compress or few compression, only as the exhaust passage of lower cylinder, compressor transfers lower cylinder single stage compression to, power consumption can be reduced, improve specified refrigeration performance and realize twin-tub single stage compression, meet specified refrigeration demand, when control valve is low pressure, the elastic force that the elastic force of valve block overcomes Compress Spring makes plunger move down, leakage port on the upside of the upper cylinder of two stage compressor on upper flange is closed, namely two-stage compression passage is through, make compressor recover normal two stage compressor function, the low-temperature heating of heat pump water heater under high pressure ratio condition and the air-conditioning high-temperature refrigeration under high pressure ratio condition can be met.
[accompanying drawing explanation]
Fig. 1 is structure sectional view of the present invention;
Fig. 2 be two-stage compression passage of the present invention through time working principle enlarged view;
The working state partial cross enlarged view of pressure relief device when Fig. 3 is single stage compression of the present invention;
Pressure relief device working state partial cross enlarged view when Fig. 4 is Two-stage Compression of the present invention;
Fig. 5 is the plan structure enlarged view of upper flange of the present invention.
[embodiment]
As shown in Figures 1 to 5, a kind of secondary double-cylinder of high refrigeration performance, comprise motor stator 1, rotor 2, bent axle 3, upper roller 4, lower roller 5, upper flange 6, upper cylinder 7, dividing plate 8, lower cylinder 9, lower flange 10, lower flange cover plate 11 and liquor separator 12, bent axle 3 is equipped with the upper and lower roller (4,5) with upper and lower cylinder (7,9) inner chamber cooperating, lower flange cover plate 11 lid is located at the lower end of lower flange 10 and forms lower cylinder exhaust cavity 13, and liquor separator 12 is provided with the sucking pipe 15 be communicated with lower cylinder 9; Upper cylinder 7, dividing plate 8, lower cylinder 9 and lower flange 10 offer the two-stage compression passage 14 being vented cavity 13 conducting with lower cylinder, described upper flange 6 offers the leakage port 16 be communicated with upper cylinder 7 active chamber, described upper flange 6 and upper cylinder 7 are provided with the pressure relief device 17 controlling leakage port 16 folding.
As shown in Figures 3 to 5, pressure relief device 17 comprises the upside that is fixed on upper flange 6 valve block 170 for shutoff leakage port 16, the upside of upper flange 6 is also provided with carries out spacing baffle plate 171 to the valve block 170 of leakage port 16, the other end of valve block 170 and the corresponding leakage port 16 of baffle plate 171 is fixed on upper flange 6 by screw 172, plunger hole 173 is offered immediately below the valve block 170 at corresponding leakage port 16 place of axial walls of upper cylinder 7 and baffle plate 171, plunger hole 173 is provided with one can control the through exhaust of leakage port 16 inverse-T-shaped plunger 174 through upper flange 6 jack-up valve block 170 and baffle plate 171, plunger hole 173 bottom is provided with the inverse-T-shaped plunger of a promotion 174 Compress Spring 175 inconsistent with the valve block 170 on upper flange 6, upper cylinder 7 is provided with the control valve 176 that plunger hole 173 is communicated with high pressure side or the low voltage side selectivity of compressor.
Continue as shown in Figures 3 to 5, the upper end of inverse-T-shaped plunger 174 is step-like projection a, the axial correspondence of upper flange 6 leakage port 16 side is provided with the through hole 60 coordinated with projection a, and the lower end of inverse-T-shaped plunger 174 offers the groove b being connected with Compress Spring 175 and coordinating.
During work, when control valve 176 is pressurized gas, "T"-shaped plunger 174 in plunger hole 173 moves, by the valve block 170 on the projection a jack-up upper flange 6 on "T"-shaped plunger 174 top in baffle plate 171 place, the exhaust passage of upper cylinder 7 is changed, directly make the upper cylinder 7 directly upper baffler of exhaust arrival by the leakage port 16 on upper flange 6, after the air-breathing compression of lower cylinder 9, directly be vented after upper cylinder 6, in this process, upper cylinder 6 does not compress or few compression, only as the exhaust passage of lower cylinder 9, compressor variable is lower cylinder 9 single stage compression, power consumption can be reduced, improve specified refrigeration performance and realize twin-tub single stage compression, meet specified refrigeration demand, when control valve 176 is low pressure, the elastic force that the elastic force of valve block 170 overcomes Compress Spring 175 makes "T"-shaped plunger 174 move down, leakage port 16 on the upside of the upper cylinder 7 of two stage compressor on upper flange 6 is closed, namely two-stage compression passage 14 is through, make compressor recover normal two stage compressor function, the low-temperature heating of heat pump water heater under high pressure ratio condition and the air-conditioning high-temperature refrigeration under high pressure ratio condition can be met.
The above embodiment is just preferred embodiment of the present invention; not limit practical range of the present invention with this; as opening and closing device is arranged on the lower flange of compressor, the equivalence change that all shapes according to the present invention, structure and principle are done, all should be covered by protection scope of the present invention.