94results about How to "Reduce inspiratory resistance" patented technology

The invention provides a screw-driven sliding piercing type electronic smoking set comprising a smoking set shell. A cigarette liquid capsule and an atomizer are mounted in the smoking set shell, an air inlet passage is formed in the atomizer, a smoking orifice is formed in the side wall of the shell, the atomizer is mounted on the other side of the shell, a piercing liquid guide frame on the atomizer is positioned on one side of the cigarette liquid capsule, and a thread is arranged on the inner or outer peripheral wall, at one end of the atomizer, of the shell. A guide block is mounted on the inner wall of one end, provided with the atomizer, of the smoking set shell axially, and a guide groove is formed in the outer wall of the atomizer and matches with the guide block. The atomizer can be completely isolated from the outside when not used, impurities are thoroughly prevented from being ignited by a heating wire to generate naked flame after dust and the impurities enter the atomizer, and harmful substances in the impurities are prevented from being inhaled into human bodies; the atomizer is prevented from being separated from the cigarette liquid capsule, so that sealing reliability between the atomizer and the cigarette liquid capsule is further kept.

The invention provides a spirally-driven slidably-punctured electronic smoking set, which comprises a smoking set shell, wherein a gas suction hole is formed in one end of the smoking set shell, and threads are arranged on the inner wall or outer wall of the smoking set shell; a tobacco juice atomizer and a tobacco juice capsule are arranged in the smoking set shell; a puncturing liquid guide frame is arranged on one side, which is close to the tobacco juice capsule, of the tobacco juice atomizer; and the tobacco juice atomizer slides in the smoking set shell along the axial direction of the smoking set shell. By the spirally-driven slidably-punctured electronic smoking set, the puncturing liquid guide frame on the tobacco juice atomizer can puncture the tobacco juice capsule in a sliding mode under the driving of a spirally-driven mode, the puncture direction and puncture force of the puncturing liquid guide frame during the puncture of the tobacco juice capsule are not needed to be mastered by users, and after the users screw the threads, the puncturing liquid guide frame can puncture the tobacco juice capsule according to the accurate direction and force; and after the puncturing liquid guide frame punctures the tobacco juice capsule, the tobacco juice capsule can keep high tightness except for tobacco juice which is led out slowly along the puncturing liquid guide frame, so that the using time of the tobacco juice capsule can be prolonged, and the tobacco juice can be prevented from being polluted.

The invention discloses a rotary compressor inspiration structure. The structure comprises a motor, a compressor body, and an inspiration tube assembly connected to the compressor body, wherein the minimum diameter of air inlets corresponding with the inspiration tube assembly and in the compressor body is d, the apparent work volume of the rotary compressor is set as V, the refrigerating capacity of a unit mass refrigerant in the rotary compressor is set as q, the rotation speed of the motor is n, and the specific volume of the refrigerant under a Chinese standard test condition is v; and for any refrigerant, the minimum diameter of the air inlets in the compressor body under Chinese standards satisfies a case that units of d, V, q, n and v are mm, cm<3>, J / kg, r / min and m<3> / kg respectively.

The invention relates to an air filtering membrane which comprises a first transparent organic thin membrane and a second transparent organic thin membrane which are stacked together, and a graphene thin membrane clamped between the two transparent organic thin membranes, wherein a plurality of first through holes are formed in the first transparent organic thin membrane; a plurality of second through holes are formed in the second transparent organic thin film and are equal to the first through holes; the diameters and the positions of the first through holes are consistent with those of the corresponding second through holes, so that a plurality of passageways are formed; and the graphene thin membrane is provided with a plurality of cracks, or a plurality of through holes are formed in the graphene thin membrane and correspond to the passageways formed by the first through holes and the second through holes. The air filtering membrane can stop ultra-small dust particles and completely meet the requirement on prevention of PM2.5, and furthermore, is high in ventilating property, transparent, soft, folding, easy to carry and convenient to mount.

The invention discloses a double-cylinder rotary type compressor component and a compression device thereof. The compression device comprises a first cylinder, a second cylinder and a partition plate, wherein a first compression cavity is formed in the first cylinder; a first air suction slot communicated with the first compression cavity is formed in the lower surface of the first cylinder; the second cylinder is arranged below the first cylinder; a second compression cavity is formed in the second cylinder; a second air suction slot communicated with the second compression cavity is formed in the upper surface of the second cylinder and corresponds to the first air suction slot from top to bottom; the partition plate is arranged between the first cylinder and the second cylinder; a third matching slot is formed in the partition plate and is matched with at least one of the first air suction slot and the second air suction slot; the first air suction slot, the second air suction slot and the third matching slot jointly form an air suction opening. According to the compression device for the double-cylinder rotary type compressor component, disclosed by the invention, the transverse size of the air suction opening is large, the air suction resistance is reduced, and the efficiency of the double-cylinder rotary type compressor component is improved.

The invention discloses a separable mask with an internal arching strip. The separable mask comprises mask cloth and bands for fixing the mask cloth, and is characterized in that an annular interlayer is arranged on the inner side of the mask cloth, the inner circumference of the interlayer is separated from the mask cloth, the interlayer is provided with an annular connecting line for connecting the interlayer with the mask cloth, and the connecting line is located on the outer side of the portion, separated from the mask cloth, of the interior of the interlayer to accordingly form a groove with an inwards-opened opening; a pressing piece is arranged and matched with the groove in size and shape to accordingly enable a part of the edge of the pressing piece to be installed in the groove, and separable connection with the mask cloth or the interlayer is accordingly achieved; the pressing piece is provided with a strip-shaped body arching towards the region, surrounded by the groove and located in front of the mouth or the nose, of the mask cloth, and the mask cloth is ejected through the strip-shaped body from the region, in front of the mouth or the nose, of the inner side of the mask cloth. Materials can be saved, the air impermeability can be improved, the effective air inspiration breathable area of the mask can be increased, the comfort of the mask can be improved, and the separable mask is healthier.

The invention relates to a portable haze purification device, which comprises a nasal mask, switches, air pumps, containers, a battery and the like, wherein the nasal mask is communicated with an outlet of a first micro air pump; an inlet of the first air pump is communicated with an outlet formed in a first sealed container; a plurality of plates with micropores are arranged inside the first sealed container; the bottom of an inner cavity of the first sealed container is communicated with an outlet formed in a second sealed container; a plurality of plates with micropores are arranged inside the second sealed container; the bottom of an inner cavity of the second sealed container is communicated with an outlet formed in a second micro air pump; an inlet of the second micro air pump is communicated with an open container; a filtering material is filled in the open container; liquid is accommodated in the sealed containers; the liquid levels of the liquid in the sealed containers are required to be higher than the microporous plates; the first micro air pump, a first switch and the battery form a circuit; the first switch is linked with a micro switch on the nasal mask; and the second micro air pump, the second switch and the battery form a circuit. The portable haze purification device is simple, feasible, convenient to carry and large in air feeding amount and ensures the smoothness of breathing of a wearer.

The invention discloses a gas suction structure of a compressor. The structure comprises a gas inlet channel provided radially on a gas cylinder. The structure also comprises a suction channel which is formed on the inner side of the gas cylinder along a gas cylinder axial direction. The suction channel penetrates the two end faces of the gas cylinder. The suction channel communicates with the gas inlet channel, and is arranged vertically. The gas inlet of the suction channel on the inner wall of the gas cylinder is a rectangular gas inlet formed on the axial direction of the gas cylinder and penetrating the two end faces of the gas cylinder. The rectangular gas inlet is arranged close to a sliding vane groove of the gas cylinder. The suction channel is convenient to manufacture. Also, with the suction channel, gas cylinder suction volume can be increased, a relatively ample buffer space is provided, such that suction resistance can be reduced, and gas can flow into the gas cylinder more smoothly.

The invention discloses a host machine of a novel oil injection sliding vane air compressor. An air cylinder comprises a shell and an interlayer. The shell is provided with a radial air inlet, and an air inlet cavity is arranged between the top of the interlayer and the shell; an air exhaust cavity is arranged between the bottom of the interlayer and the shell. The bottom of the interlayer is provided with inner air exhaust openings. The front end face and the rear end face of the shell are provided with a front end cover and a rear end cover respectively. The front end cover and the rear end cover are provided with a front end cover air suction cavity and a rear end cover air suction cavity respectively. A rotor is eccentrically arranged in the interlayer. The front shaft neck of the rotor is sleeved with a front bearing and a front shaft seal from front to back sequentially. The rear shaft neck of the rotor is sleeved with a rear bearing and a rear shaft seal from front to back sequentially. The host machine of the novel oil injection sliding vane air compressor is short in air suction path and high in volume efficiency, and is capable of ensuring that no leakage occurs when the rotor rotates axially and effectively avoiding the trouble of shaft sticking when a sliding vane air compressor is started at low temperature. The host machine of the novel oil injection sliding vane air compressor further has the advantages of being low in manufacture cost, small in manufacture difficulty and convenient to maintain.

The invention provides a compressor.The compressor comprises a shell and a first flange, a first air cylinder, a second air cylinder and a second flange which are sequentially arranged in the shell from top to bottom, wherein the shell is provided with a first air outlet, the first air cylinder is provided with a first slide vane groove, and the second air cylinder is provided with a second slide vane groove.The compressor further comprises a first air channel.The first air cylinder is provided with a first air cylinder air suction port, the second air cylinder is provided with a second air cylinder air suction port, and the first air cylinder air suction port is communicated with the second air cylinder air suction port through the first air channel.The compressor has a single-cylinder operation mode and a double-cylinder operation mode.When the compressor is in the single-cylinder operation mode, the first air cylinder sucks air through the first air cylinder air suction port and the second air cylinder air suction port; when the compressor is in the double-cylinder operation mode, both the first air cylinder and the second air cylinder suck air through the first air cylinder air suction port and the second air cylinder air suction port.The compressor has the advantage that when the compressor is in the single-cylinder operation mode, air suction resistance can be lowered, and the energy efficiency of the compressor can be increased.

The present invention is an air intake device for a two-wheeled motorcycle, which is formed in an air filter housing divided into an upstream side air chamber and a downstream side air chamber by an air filter element, and the lower part of the air filter housing has a The lower opening is further provided with a rib that surrounds at least a part of the circumference of the lower opening and protrudes downward from the air filter case. It is possible to prevent rainwater and muddy water from being sucked into the air filter housing while reducing the suction resistance.

The invention provides a dustproof mouth mask with a dynamic breathing function for a dust work environment. A filter material of the dustproof mouth mask adopts corrugated filter sponge, the adopted corrugated angle theta of the filter material is less than 60 DEG, a corrugated generating line is parallel to the gravity direction, and an air outlet and the downstream part of the filter material at an air inlet of the mouth mask are provided with a high-speed centrifugal fan respectively. On the premise of meeting the air flow for breathing of a human body, the effective filter area of the filter material is increased, the air speed is reduced, the flow resistance of the filter material is reduced, and the inhalation resistance is reduced. A micro electric air supplying and exhausting system and the micro high-speed centrifugal fan are adopted; and the requirement of the pressure in the inhaling process of the human body can be fully met, and the increment of the pressure in the inhaling process of the human body is controlled to be in the reasonable range at the same time. The breathing pressure difference of the novel mouth mask is controlled to be within 30 Pa, the structure design and the control of the whole system are simplified while the safety is met and the comfort is improved, and the mouth mask is small in volume, light in weight and convenient to carry.

The invention discloses a sound-proof double air inlet micro air pump. The sound-proof double air inlet micro air pump comprises a motor and a shell assembly, wherein the shell assembly comprises a fixed base and a cup base; a valve seat is mounted on the cup base; an upper cover with an air outlet is arranged on the valve seat; the fixed base and the cup base are enclosed to form an air inlet cavity; the valve seat and the upper cover are enclosed to form an exhaust cavity; an eccentric cap, a linkage shaft and a linkage bracket are arranged in the air inlet cavity; an air compression cup is mounted on the cup base; a one-way exhaust valve is mounted on the valve seat; filtering sound-proof cotton is arranged in the exhaust cavity; an inner cavity of the air compression cup is an air compression cavity; the eccentric cap is connected with a motor; an eccentric hole is formed in the eccentric cap; one end of the linkage shaft is mounted in the eccentric hole; the other end is connected with the linkage bracket; a left air inlet hole and a right air inlet hole are formed in the fixed base; and positions of the left air inlet hole and the right air inlet hole exceed a rotation track of the eccentric cap to form a double air inlet structure. The sound-proof double air inlet micro air pump has the advantages of reducing air noise, large air suction amount, reducing air suction resistance and reducing vibration.

The invention provides a compressor pump body and a compressor provided with the same. The compressor pump body comprises an upper flange, an air cylinder, an air suction channel and a lower flange, wherein the air cylinder is arranged under the upper flange; the air suction channel is formed in the upper flange and the air cylinder and enables the upper flange and the air cylinder to be communicated, and the axis of at least part of the air suction channel is arranged obliquely relative to the axis of the air cylinder; the lower flange is located under the air cylinder and is connected with the air cylinder. The air suction channel enabling the upper flange and the air cylinder to be communicated is formed in the upper flange and the air cylinder, the axis of at least part of the air suction channel is arranged obliquely relative to the axis of the air cylinder. In this way, the compressor pump body sucks air from the upper flange through the air suction channel; besides, since the axis of at least part of the air suction channel is arranged obliquely relative to the axis of the air cylinder, the air suction resistance of the compressor pump body is reduced effectively, and accordingly the power of the compressor pump body is increased. The problems that a compressor is high in air suction resistance and low in efficiency in the prior art are solved effectively.

A novel separable mask comprises compressing pieces with elastic soft rubber strips or air bags or liquid bags or arbitrary combinations of the elastic soft rubber strips, the air bags and the liquid bags. Straps are connected to the compressing pieces directly or indirectly through compounds and draw the compressing pieces by hanging ears or sleeving a head, so that the compressing pieces cover the periphery of mask cloth, the compressing pieces, the mask cloth and the skin of a user can be sequentially connected, the compressing pieces are separated from the mask cloth to form a compressed surface of a closed loop on the skin of the user, the compounds or the compressing pieces are provided with fixing devices matched with fixing parts of the mask cloth in an area surrounded by the closed loop, so that the compressing pieces are separably connected with the mask cloth in the area, and the mask cloth in the area surrounded by the closed loop is lifted outwards and tensioned by the fixing devices and separated from the skin to form a stereoscopic cavity in front of the area surrounded by the closed loop when the compressing pieces are connected with the mask cloth. The air tightness of the mask is improved, and effective ventilation area is increased.

Provided is a saddle-ride type vehicle in which a long intake duct is disposed linearly in a limited layout space, so that intake noise can be effectively reduced. An intake duct (110) attached to an intake opening of an air cleaner (64) is caused to extend linearly toward the rear of a vehicle through a space surrounded by a center tunnel cover (31D), a main frame (4), and the air cleaner (64).

The invention discloses a method and a system for measuring aspiratory flow velocity by a differential pressure type sensor. The method comprises the following steps: sensing a flow velocity signal bya sensing device and converting the flow velocity signal into a level signal; comparing the level signal with a predetermined level by a comparer; sampling the level signal by a sampler under the condition that the level signal is more than the predetermined level so as to acquire an AD sampling signal, and calculating the current flow velocity by a first processor according to the AD sampling signal; amplifying the level signal by an amplification circuit under the condition that the level signal is less than the predetermined level; and sampling the amplified level signal by the sampler soas to acquire the amplified AD sampling signal, and calculating the current flow velocity by a second processor according the amplified AD sampling signal.

The invention belongs to a design method of a mask, and discloses a manufacturing method of a customized mask. The method comprises the following specific steps: S10, carrying out three-dimensional scanning on the face of a human body to obtain scanning data; S20, processing the scanning data and performing face reverse modeling to obtain a face model; S30, designing a preliminary mask contour model according to the face model; S40, adding interfaces matched with an expiration device and an inspiration device to the preliminary mask contour model to obtain a final mask contour model; S50, performing 3D printing on the final mask contour model to obtain a mask contour model entity; and S60, installing the expiration device, the inspiration device and a tightening belt at the interface of the mask contour model entity to obtain the final customized mask. The customized mask prepared by the preparation method is good in matching property with a human face and high in adaptation degree, and tightening marks are not easily formed locally after the mask is worn for a long time; and the breathing resistance and the inspiration resistance of the mask can be greatly reduced, and a wearer can breathe smoothly.

The utility model relates to a suction muffler of a refrigeration compressor, which belongs to accessories of the refrigeration compressor. Including the main shell and the shell cover, the main shell has the main shell suction cavity, the main shell air inlet, the main shell muffler chamber, the main shell air outlet interface and the filter screen, the shell cover has the shell cover suction cavity and Shell cover anechoic chamber, features: a pair of splints are formed in the anechoic chamber of the main shell, and a slot for inserting plates is formed between the pair of splints, a transitional ventilation pipe and an air induction pipe are formed in the anechoic chamber on the main shell, and a transitional air pipe is formed in the anechoic chamber under the main shell It constitutes the ventilation pipe of the main shell; the inserting plate is formed in the sound-absorbing chamber of the shell cover, and the inserting plate is inserted into the slot of the inserting plate; A liquid discharge hole is opened on the bottom of the suction chamber of the shell and on the pipe wall of the air intake pipe of the shell cover. Advantages: The upper and lower anechoic chambers are enlarged, the path of the entire suction pipeline is long, the suction resistance of the suction pipeline is reduced, and it is beneficial to the efficient operation of the refrigeration compressor; it can protect the cylinder.

A refrigeration compressor suction muffler includes a shell body and a shell cover; the inside of the shell body is provided with a partition plate, the partition plate extends from the front inner wall of the shell body to the rear inner wall of the shell body, and the partition divides a shell body cavity into a first silencing cavity and a second silencing cavity which communicate with each other; an air outlet nozzle extends from the left end of the outer wall of the front side of the shell body, the air outlet nozzle communicates with the second silencing cavity, and shell body positioning members are arranged on the outer wall of the shell and surrounds the periphery of the shell body at intervals; shell cover positioning members are arranged around the outer wall of the shell coverand at positions corresponding to the shell body positioning members at intervals, and the shell cover positioning members are matched with the shell body positioning members, an air inlet hole is formed in the right side wall of the shell cover, and the air inlet hole communicates with the first silencing cavity; and the refrigeration compressor suction muffler is characterized in that a shell body upper edge seal fitting groove is formed in the position of the peripheral edge of the outer wall of the shell cover side facing the shell body and the position corresponding to the upper edge of the shell body, and the shell body upper edge seal fitting groove is matched with the upper edge of the shell body in a sealing mode. According to the refrigeration compressor suction muffler, the noise is significantly reduced, the air suction resistance is decreased, and the volume is reduced to improve the assembly efficiency.

The invention relates to a flexible fluid-directing double-spiral-sleeve type heat exchanger which comprises a compressor, a condenser, an evaporator and a collecting barrel; the structures of the condenser and the evaporator comprise tube sleeves and thin heat exchanging pipes; the outer wall of each thin heat exchanging pipe is provided with flexible fluid directors at intervals,and the condensers and the evaporators are respectively communicated with the compressor by the heat exchanger; the heat exchanger comprises an outer sleeve barrel, an upper exhaust port, a lower exhaust port, an evaporator connecting port, a compressor connecting port, and an inner heat exchanging pipe; the invention causes that the cooling water and a refrigerant to run in a reverse spiral mode so as to improve the coefficient of heat exchanging; the existence of flexible fluid director further intensifies the heat exchanging efficiency of the heat exchanger; the energy efficiency ratio (EER) of the invention is more than or equal to 5.66, coefficient of performance (COP) is more than or equal to 4.8, coefficient of heat transfer (K) is more than or equal to 2000W / M <2> DEG C, capacity of heat extraction ranges from 1KW to 400KW, refrigerating output is increased by about 30 percent compared with the prior art, while the materials used for the heat exchanging pipe is reduced about 20 percent, and effects of saving energy and reducing consumption are obvious. Therefore, the invention achieves the requirements and aims of saving energy, increasing efficiency and reducing power consumption.

The invention belongs to the technical field of protective articles, and particularly relates to a protective mask and a preparation method thereof. The protective mask provided by the invention comprises a main body and ear rope sleeves, wherein the main body comprises a fabric layer, a first porous membrane material layer, a two-component fabric layer, a second porous membrane material layer anda non-woven fabric layer which are sequentially stacked from outside to inside; a hot melting fiber net is arranged between the fabric layer and the first porous membrane material layer; the first porous membrane material layer and the second porous membrane material layer are polytetrafluoroethylene porous membranes or melt-blown non-woven fabrics independently; and at least one of the first porous membrane material layer and the second porous membrane material layer is a polytetrafluoroethylene porous membrane. The first porous membrane material layer and the second porous membrane materiallayer form a double-layer porous membrane structure, so the liquid-repellent and mist-repellent properties of the protective mask is achieved, and it is guaranteed that the layer structure of the protective mask is not changed when the protective mask is cleaned; and filtering is not conducted through electrostatic interaction, and the protective mask can be washed with water.

The invention relates to an F25B refrigeration machine, a refrigeration device or system class in international patent classification (IPC) through searching, and particularly belongs to a refrigeration screw compressor suction end base with a check valve. According to the technical scheme adopted by the invention, the refrigeration screw compressor suction end base comprises a suction end body (1), and is characterized in that an end body sealing surface (2) is made on the suction end body (1), and a check valve (3) is arranged on the end body sealing surface (2). The refrigeration screw compressor suction end base with the check valve has the beneficial effects that the check valve in a compressor replaces an external pipeline check valve, and thus the back flow on a high pressure side and a low pressure side of the compressor is effectively prevented to ensure that suction pipelines in the design of the compressor unit are more simplified, connecting parts of external pipelines are reduced, and refrigerating fluid leakage points are reduced; and due to the adoption of the structure design of the flap check valve, the convenience is brought for checking and cleaning a filter of the compressor, and the suction resistance can be effectively reduced and the refrigerating capacity of the compressor is increased.

The invention provides an air suction device, a compression air suction structure and air conditioning equipment. The air suction device comprises an air suction pipeline. The air suction pipeline comprises a necking pipe section, a first pipe section and a second pipe section which are connected in sequence, and an air inlet of the necking pipe section is used for being in butt joint and communicated with an air outlet of an air conveying pipeline; a filtering device is arranged at a butt joint of the air inlet of the necking pipe section and the air outlet of the air conveying pipeline; at least parts of the necking pipe section, the first pipe section and the second pipe section are arranged on the outer side of the compressor; the plurality of second pipe sections are arranged in parallel and correspond to multiple compression air cylinders of the compressor in a one-to-one mode, and an air outlet of each second pipe section communicates with an air inlet of the corresponding compression air cylinder. Therefore, gas filtered by the filtering device sequentially passes through the necking pipe section, the first pipe section and the second pipe sections and then directly entersthe corresponding compression air cylinders. The air suction device is used for solving the problem that in the prior art, the air suction efficiency of the compressor is low.

The invention discloses an oxygen-making and nitrogen-making air compressor, relating to the field of air compressors. The oxygen-making and nitrogen-making air compressor comprises an air compressor main machine (1), an air buffering tank (2), an oil remover (3), an air filter (4), a cooling air duct (5) and a cooler (6), wherein the air compressor main machine (1), the air buffering tank (2), the oil remover (3), and the air filter (4) are sequentially connected, and the air filter (4) is connected with the cooler (6) by the cooling air duct (5); and the air filter (4) uses an air filter element with a nanometre surface layer. The filter element of the oxygen-making and nitrogen-making air compressor is low in air suction resistance and energy consumption, thus greatly increasing the service life of the air compressor main machine; and the oxygen-making and nitrogen-making air compressor is convenient to clean, low in maintenance cost, safe and reliable.

The invention discloses a rotor-free unmanned aerial vehicle in the technical field of unmanned aerial vehicles, the rotor-free unmanned aerial vehicle comprises a vehicle body and four sets of vehicle arms annularly arranged on the periphery of the vehicle body, an air inlet bin is arranged in the vehicle body, the air inlet bin is provided with air inlets communicating to the two sides of the vehicle body, and the vehicle arms are each of a hollow pipe body structure; the inner side ends of the machine arms are communicated with the air inlet bin through soft air pipes, the outer side ends of the machine arms are communicated with airflow jet rings, turbofans driven by servo motors are arranged in the four sets of machine arms respectively, and a battery mainboard bin is arranged at the position, located below the air inlet bin, in the machine body. According to the rotor-free unmanned aerial vehicle, most topographic conditions can be ignored, the unmanned aerial vehicle is different from an unmanned aerial vehicle with external rotor wings, blades are prone to being damaged during flight, the unmanned aerial vehicle is damaged, and the unmanned aerial vehicle with the built-in rotor wings can be ignored from the dangerous factors, so that the unmanned aerial vehicle with the built-in rotor wings is safe and reliable. And the unmanned aerial vehicle has good flight stability, controllability and safety.

The invention discloses a double-rotor double-stage compressor and a refrigerating / heating system thereof. The compressor comprises a double-stage compression mechanism, a driving motor, a shell, a liquid reservoir, an air suction pipe and a connecting pipe, wherein the driving motor is used for driving the double-stage compression mechanism; the double-stage compression mechanism and the driving motor are arranged in the shell; the double-stage compression mechanism comprises a low-pressure-stage rotor compression mechanism and a high-pressure-stage rotor compression mechanism; the connecting pipe comprises a three-way pipe, and a low-pressure-stage air exhaust pipe, a high-pressure-stage air suction pipe and an injection pipe which are connected with the three-way pipe; an inlet of the liquid reservoir is connected with the air suction pipe, and an outlet of the liquid reservoir is connected with a low-pressure-stage air cylinder of the low-pressure-stage rotor compression mechanism; one end of the low-pressure-stage air exhaust pipe is connected with an air exhaust opening of the low-pressure-stage rotor compression mechanism, and the other end of the low-pressure-stage air exhaust pipe is connected with the three-way pipe; one end of the high-pressure-stage air suction pipe is connected with the three-way pipe, and the other end of the high-pressure-stage air suction pipe is connected with a high-pressure-stage air cylinder of the high-pressure-stage rotor compression mechanism. According to the double-rotor double-stage compressor and the refrigerating / heating system thereof, the aims of realizing double-stage compression, central air supplementation and increase of the enthalpy, reducing the air exhaust temperature and improving the capacity of the compressor are achieved, and a lower bearing structure of the compressor is simplified.

The invention provides a compressor gas valve set, a compressor and a refrigerator. The compressor gas valve set comprises an air suction valve block, the air suction valve block comprises a body, anair suction valve tongue is formed on the body, the air suction valve tongue is provided with a seal part for sheltering an air cylinder air suction opening and a connecting part formed between the seal part and the body, and the seal part is provided with a fan ring arc segment which is matched with the shape of the air cylinder air suction opening. According to the compressor gas valve set, thecompressor and the refrigerator, due to the fact that the fan ring arc segment of the seal part of the air suction valve tongue is matched with the shape of the air cylinder air suction opening, the area of an air cylinder hole can be used to the maximum degree, the air suction area is ensured, the air suction efficiency is improved, and the refrigeration amount and the energy efficiency of the compressor can be improved.