123results about How to "Increase inspiratory pressure" patented technology

The invention provides a non-intermittent phase-change heat storage defrosting system, which relates to an energy storage defrosting system. The defrosting system aims at solving the problems that an air source hot pump defrosting method has the poor stability and reliability of machine units and the rooms become less comfortable after heat supply is stopped. The defrosting system of the invention is characterized in that an indoor machine is connected with a first pipeline and a second pipeline; an outdoor machine is connected with a second pipeline and a third pipeline; the third pipeline is respectively connected with the indoor pipeline and the outdoor pipeline; a fourth pipeline and a fifth pipeline are respectively connected with the fist pipeline and the third pipeline; a compressor is connected with a gas-liquid separator; a four-way directional valve is respectively connected with the first and the fifth pipelines, the gas-liquid separator and the compressor; the phase-change heat storage device is connected with the fifth and the fourth pipelines through a sixth pipeline and a seventh pipeline; an eighth pipeline is respectively connected with the fifth and seventh pipelines; a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve and a ninth valve are respectively arranged on the fifth pipeline, the sixth pipeline, the seventh pipeline, the eighth pipeline, the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the first pipeline; a capillary pipe is arranged on the fourth pipeline. The defrosting system of the invention has good stability and reliability, high defrosting speed, and high comfort level of the room after the heat supply is stopped.

The invention relates to an ultra-low temperature circulation refrigeration method employing injectors. In the method, high-pressure mixed refrigerants compressed by a compressor (1) enter a condenser (2) and then enter a first gas-liquid separator (3) to realize gas and liquid phase separation, liquid refrigerants flowing out of the first gas-liquid separator (3) enter a first injector (4), gas and liquid two-phase mixed work media from an outlet of the first injector (4) are cooled by a first heat regenerator (5) and then enter a second gas-liquid separator (6) to be separated, work fluid of a second injector (8) is processed into low-pressure steam through a first throttling member (7) and a condensing evaporator (9), and the low-pressure steam is pressurized by the second injector (8), flows into the first heat regenerator (5) to be subjected to overheating and then flows back to the compressor (1); and gaseous refrigerants flowing out of the top of the first gas-liquid separator (3) flow into the condensing evaporator (9), are recooled through a second heat regenerator (10) and enter an evaporator (12) through a second throttling member (11) for refrigeration at low temperature, the ultra-low temperature can reach minus 40 DEG C to minus 170 DEG C, and the energy saving effect is good.

The present invention to an energy-storing phase change material and energy-stored air source heat pump defrosting system, belonging to the field of refrigeration equipment technology. The chemical component of said energy-storing phase change material is formed from CaCl2.6H2O and nucleating agent. Said invention also provides the concrete structure of said system. Said system can implement the function conversion from system heat production, waste heat energy storage, energy-releasing defrosting and heat production.

The invention discloses a gas-liquid phase ejector synergy refrigeration system for a double temperature direct cooling-type refrigerator, wherein a compressor, a condenser, a drying filter, a first capillary tube and a cold storage room evaporator are connected in sequence; an outlet of the cold storage room evaporator is connected with an inlet of a gas and liquid mixer of an ejector; an injected refrigerant inlet of the ejector is connected with the outlet of a frozen chamber evaporator; the outlet of the ejector is connected with the inlet of a gas-liquid separator; a saturated gaseous refrigerant outlet of the gas-liquid separator is connected with the inlet of the compressor through a compressor air suction pipe with a backheating effect; a saturated liquid refrigerant outlet is connected with the inlet of the frozen chamber evaporator through a second capillary tube; the ejector is a gas-liquid phase ejector, and the working fluid of the gas-liquid phase ejector is mixed gas-liquid refrigerants flowing out from the outlet of the cold storage room evaporator; in addition, the gas-liquid phase ejector is utilized to fully recover the expansion work in the refrigeration system during the throttling process, the suction pressure and the gas delivery capacity of the compressor can be increased obviously, the power consumption of the compressor can be reduced, and simultaneous refrigeration of the cold storage room evaporator and the frozen chamber evaporator can be achieved at different evaporating temperatures.

The invention discloses a method for controlling low-temperature heating start of an air conditioner as well as the air conditioner and a storage medium. The method for controlling low-temperature heating start of the air conditioner comprises the following steps: responding to a heating start instruction, and obtaining outdoor environment temperature and compressor duration time of stopping operation; according to the outdoor environment temperature and the compressor duration time of stopping operation or according to the outdoor environment temperature and length of a connected tube of theair conditioner, determining that the air conditioner meets a condition of entering a low-temperature heating start control mode; performing at least one of the following: controlling compressor operation, and controlling a four-way valve to electrify while operation time length of the compressor reaches first preset time length; regulating rotation speed of an outdoor fan according to the outdoorenvironment temperature; and obtaining a compressor gas exhaust temperature, and controlling a heating state of an electric heating belt of the compressor according to the gas exhaust temperature andthe outdoor environment temperature. The method can increase gas suction pressure, under a low-temperature environment, of the compressor, and strengthens use reliability of the compressor.

The invention discloses a low-grade heat energy auxiliary-drive composite low-temperature refrigerating system. The system comprises a generator, an ejector, a working medium pump, a condenser, a gas-liquid separator, a compressor, a first throttling component, a condensation evaporator, a second throttling component, an evaporator and a heater. A high-boiling-point component is condensed into liquid to serve as a low-boiling-point component cooling medium through the ejector driven by the low-grade heat energy; and the ejector has another function of increasing suction pressure of the low-boiling-point component at a suction port of the compressor to reduce the compression ratio of the compressor so as to realize lower refrigerating temperature. Because the compression process of the high-boiling-point component during circulation is finished by the ejector, the power consumption of the compressor is reduced; and the ejector also improves the suction pressure of the low-boiling-point component at the suction port of the compressor and is also favorable for further reducing the power consumption of the compressor. The system has the advantages of realizing high-efficiency utilization of a low-grade energy source, along with stable running, obvious energy saving effect and broad application prospect.

The invention discloses an air cooled heat pump unit and a control method, device and system of the unit. The control method of the air cooled heat pump unit comprises the steps of obtaining air suction pressure detected by an air suction pressure sensor; the air suction pressure is compared with the first preset air suction pressure; if the air suction pressure obtained continuously within the first preset time segment is smaller than or equal to the first preset air suction pressure, a by-pass mechanism is started, and the opening degree of a main loop electronic expansion valve is adjusted to the preset opening degree. The technical problem that when an existing air cooled heat pump unit is started under the condition of low circumstance temperature and low water temperature, frequent low-pressure protection appears, and even starting cannot be achieved is solved.

The invention discloses a refrigeration circulating system with a double-stage-injection ejector. The refrigeration circulating system comprises a compressor, a condenser, a gas and liquid separator, a first throttling mechanism, a second throttling mechanism, a first evaporator, a second evaporator and the ejector with a double-stage injection function which are connected on a pipeline, the ejector is provided with two suction chambers and two diffusers, and two refrigerant flows with different evaporating temperatures from the two evaporators are respectively injected. The double evaporators with different evaporating temperatures are arranged and can match with change of the temperature of an air side better, and irreversible loss in an evaporation heat exchange process can be reduced. Simultaneously, higher outlet pressure of the ejector with the double-stage injection function can be obtained as compared with a conventional single-stage ejector, air suction pressure of the compressor is improved, air suction specific volume is reduced, and accordingly a performance coefficient and refrigerating capacity or heating capacity of unit volume of the system are further increased. Accordingly, the refrigeration system has remarkable advantages in terms of improving performances of a refrigeration system.

The present invention relates to a compression / injection mixed refrigerating machine unit in the field of refrigerating technology. Said invention includes compressor, oil separator, condenser, high-pressure liquid storage device, filtering dryer, sight glass, electromagnetic valve, two-stage injector, low-pressure liquid storage device, thermal expansion valve and evaporator. Said invention also provides their connection mode and its working principle.

A novel compression / injection mixed refrigerating cyclic system used for a double-temperature refrigerator comprises a compressor, an outlet of the compressor is connected with an inlet of a condenser, the outlet of the condenser is divided into two paths, one path is connected with a first jet nozzle of a double-jet nozzle ejector, the other path is connected with an inlet of an evaporator of a refrigerating chamber by a first capillary tube, and an outlet of the evaporator of the refrigerating chamber is connected with a second jet nozzle of the double-jet nozzle ejector; the double-jet nozzle ejector is connected with an outlet of the evaporator of the refrigerating chamber by an injection refrigerating agent inlet; an outlet of the double-jet nozzle ejector is connected with an inlet of a gas-liquid separator; an outlet of the gas-liquid separator is divided into two paths, one path is that a saturated gas-state refrigerating agent outlet is connected with an inlet of the compressor, and the other path is that a saturated liquid-state refrigerating agent outlet is connected with the inlet of the evaporator of the refrigerating chamber by a second capillary tube; and the double-jet nozzle ejector fully utilizes the expansion work in the throttling process in a refrigerating system, the suction pressure and the gas output quantity of the compressor can be promoted obviously, the power consumption of the compressor is reduced, the performance of the refrigerating cyclic system is improved effectively, and the refrigeration of the refrigerating chamber and the evaporator of the refrigerating chamber can be realized simultaneously.

The invention provides a control method for uniformly distributing a refrigerant during refrigeration of a modular multi-split air conditioner. The control method comprises the following steps of a) calculating the total capacity requirement N of an indoor unit module for m outdoor unit modules connected in parallel under the refrigeration operation state; b) initially distributing the capacity requirement of each outdoor unit module; c) detecting the bottom temperature Tbi of a compressor of the ith outdoor unit module by using a first temperature sensor; d) detecting the air return temperature Tri of the compressor of the ith outdoor unit module by using a second temperature sensor; e) calculating the air return superheat SHi of the ith outdoor unit module according to a formula that Shi=Tbi-Tri; f) adjusting the capacity requirement Ni of the ith outdoor unit module according to the air return superheat Shi of the ith outdoor unit module, making the air return superheat Shi and the adjusted capacity requirement NI' meet the following function: I=1,2,3,ellipsis,m, wherein NI'=[NI']=min{n belongs to Z and NI' is less than or equal to n}, and repeating steps c, d, e and f every ten minutes. The invention also provides a modular multi-split air conditioner for uniformly distributing a refrigerant during refrigeration. By the control method, the refrigerant in outdoor unit modules is distributed uniformly.

The invention provides a solar assisted ejector synergized steam compression type heat pump circulating system and method. The system comprises a compressor and a condenser which are connected with each other; the outlet of the condenser is divided into two paths; one path passes through a stop valve to be connected with the inlet of a booster pump; the outlet of the booster pump is connected with a solar heat collector / generator inlet; a solar heat collector / generator outlet is connected with an ejector working fluid inlet; the other path is connected with an expansion valve inlet and an expansion valve outlet is connected with an evaporator inlet; an evaporator outlet is divided into two paths; one path passes through the stop valve to be connected with an ejector driving fluid inlet, and the other path passes through the stop valve to be connected with a gas suction opening of the compressor; an ejector outlet passes through the stop valve to be connected with the gas suction opening of the compressor. According to the system, high-pressure working fluid is provided for an ejector by using a solar heat collector / generator, and low-temprature refrigerating agent gas at the evaporator outlet is ejected into the ejector, and the gas suction pressure of the compressor is improved, so that the power consumption of the compressor in the cycle is reduced, the gas outlet amount is improved, and the performance of the heat pump circulating system is improved.

A non-azeotropic hydrocarbon mixture automatic overlapping refrigerating cycle system for a double-temperature refrigerator comprises a compressor, the compressor, a condenser, a dry filter, a first heat returning device, a first capillary tube and a refrigerating chamber evaporator are sequentially connected, an outlet of the refrigerating chamber evaporator is connected with an inlet of a gas-liquid separator, an outlet of the gas-liquid separator is divided into two paths, a saturation liquid state cooling agent in one path passes a second capillary tube to be connected with a cooling fluid inlet of a condensation evaporator, a saturation liquid state cooling agent in the other path is connected to a hot fluid inlet of the condensation evaporator, a hot liquid outlet of the condensation evaporator passes a second heat returning device and a third capillary tube to be connected with an inlet of a freezing chamber evaporator, and an outlet of the freezing chamber evaporator passes the second heat returning device to be connected with a cold fluid outlet of the condensation evaporator and then passes the first heat returning device to be connected with an inlet of the compressor. The performance of the refrigerating cycle system of the double-temperature refrigerator is effectively improved by utilizing the temperature glide and the achievable automatic overlapping cycle characteristic of the non-azeotropic mixture cooling agent, and the development of the energy-saving technology of household refrigerator products is promoted.

The invention discloses a two-stage evaporative refrigeration system provided with an ejector. The two-stage evaporative refrigeration system provided with the ejector comprises a first-stage refrigeration pipeline, a second-stage refrigeration pipeline and a third-stage refrigeration pipeline, wherein the two ends of the first-stage refrigeration pipeline communicate with a compressor and a first gas-liquid separator correspondingly, and a first condenser is arranged on the first-stage refrigeration pipeline; the second-stage refrigeration pipeline comprises a first refrigeration sub-pipeline and a second refrigeration sub-pipeline which are arranged in parallel, the two ends of the first refrigeration sub-pipeline communicate with the first gas-liquid separator and a second gas-liquid separator correspondingly, and the two ends of the second refrigeration sub-pipeline communicate with the first gas-liquid separator and the compressor correspondingly; and the third-stage refrigeration pipeline comprises a first refrigeration branched pipeline and a second refrigeration branched pipeline which are arranged in parallel, the first refrigeration branched pipeline communicates with the second gas-liquid separator and the ejector, the second refrigeration branched pipeline communicates with the second gas-liquid separator and the compressor, and a second evaporator is arranged on the third-stage refrigeration pipeline. According to the two-stage evaporative refrigeration system provided with the ejector, part of expansion work is recovered, and thus energy efficiency is improved; the thickness of a liquid film is reduced, and thus condensation efficiency is improved; and the operating stability of the second evaporator is improved, and all heat exchanger components are regulated and controlled.

The invention relates to a heat pump air conditioner, which comprises a compressor, an indoor heat exchanger, a gas-liquid separator, an outdoor heat exchanger, a throttling device and an injector. An inlet of the injector is communicated with one end of the indoor heat exchanger; the other end of the indoor heat exchanger is communicated with a high-pressure outlet of the compressor; a low-pressure inlet of the compressor is communicated with an upper cavity of the gas-liquid separator; an outlet of the injector is communicated with the upper cavity of the gas-liquid separator; an air suction hole of the injector is communicated with one end of the outdoor heat exchanger; and the other end of the outdoor heat exchanger is communicated with the bottom of the gas-liquid separator. When the heat pump air conditioner works at an outdoor low-temperature environment, the heat pump air conditioner uses the injector to raise pressure of low-pressure cooling medium gas entering from a low-pressure inlet of the compressor, so as to raise gas suction pressure of the compressor, and enable the compressor to be in a normal pressure range, thereby ensuring that the heat pump air conditioner can still work normally at the outdoor low-temperature environment and has favorable heating effect.

The invention discloses an ejector expansion auto-cascade refrigeration circulation system and a work process. The system comprises a compressor, a condenser, an ejector, a gas and liquid separator, athrottling valve, an evaporator, a backpressure valve and an evaporation cooler which are connected on a pipeline; the ejector takes condenser outlet high-pressure non-azeotropy mixture refrigerationagent gas and liquid two-phase fluid as work fluid, an evaporator outlet low-pressure refrigeration agent is ejected, a two-phase refrigerant obtained after mixed pressure rise enters the gas and liquid separator through an ejector outlet to be separated into the liquid state and the gas state, a gas outlet of the gas and liquid separator is divided into two paths, one path is connected with an air suction pipeline of the compressor, and the other path is connected with a condensation channel inlet of the evaporation condenser; a liquid outlet of the gas and liquid separator is connected withthe backpressure valve, and the backpressure valve adjusts the flow and the pressure of the refrigeration agent of the evaporation condenser by sensing the liquid outlet pressure of the gas and liquid separator. The ejector and the backpressure valve are effectively arranged in the auto-cascade refrigeration circulation system, the ejector expansion power recycling effect and the system dynamic adjusting effect can be sufficiently improved, and the refrigeration efficiency of the auto-cascade refrigeration circulation system can be efficiently improved.

The invention provides a heat pump system. The heat pump system comprises a compressor, a first heat exchanger, a second heat exchanger, an ejector, a gas-liquid separator, a throttling device, a first reversing assembly, a second reversing assembly and a third reversing assembly. The second reversing assembly and the third reversing assembly are matched with the first reversing assembly so that the heat pump system can be conveniently switched to be under a refrigerating working condition, a heating working condition, a jet-refrigerating working condition and a jet-heating working condition, and the heat pump system can be selectively under the proper operating condition according to the operating situation so as to operate more efficiently, for example, selection of the operating mode of the heat pump system can be determined according to the high-low pressure difference in the operating process of the heat pump system.

The invention discloses a CO2 high-temperature heat pump system. The CO2 high-temperature heat pump system comprises a condenser, a vortex tube, a compressor, a gas-liquid separator, a first expansion valve, a second expansion valve and an evaporator, wherein an outlet of the compressor is connected with an inlet of the vortex tube; a high-temperature outlet of the vortex tube is connected with a refrigerating fluid inlet of the condenser; a low-temperature outlet of the vortex tube is connected with the gas-liquid separator; a refrigerating fluid outlet of the condenser is connected with the gas-liquid separator via the first expansion valve; a gas outlet of the gas-liquid separator is connected to an inlet of the compressor through a gas suction tube; a liquid outlet of the gas-liquid separator is connected to a first inlet of the evaporator via the second expansion valve; and a first outlet of the evaporator is connected with the gas-liquid separator. The vortex tube and an ejector are arranged on the heat pump system, a vortex shedding effect of the vortex tube is utilized, water with high temperature can be provided by the condenser under the condition that a heat pump has constant exhaust pressure, and the application range of the high-temperature heat pump is expanded further; and moreover, the air suction pressure of the compressor can be increased with the aid of the ejector, and the energy efficiency of the heat pump is improved.

The invention provides a mixed refrigerant refrigeration circulating system which comprises a compressor, a generator, a first condenser, a first heat exchanger, a throttling valve, an evaporator, an injector, a second condenser, a liquid-vapor separator and a driving pump. Mixed refrigerant passes the compressor to enter the generator, the condensers and the heat exchanger, and then enters the heat exchanger to be reheated prior to be injected by the injector; after being mixed with the injected refrigerant, the mixed refrigerant enters the condensers to turn into vapor and liquid phases, and after being separated via the liquid-vapor separator, the vapor-phase refrigerant enters the compressor; the liquid-phase refrigerant passes the driving pump and the generator, then flows into the injector prior to injecting the vapor-phase refrigerant reheated by the heat exchanger, and finally is mixed in the injector prior to entering condensers, and accordingly circulation is finished. The mixed refrigerant refrigeration circulating system has the advantages that the compressor is used for heat remove, high-temperature and high-pressure steam is generated to drive the injector to inject throttled refrigerant, suction pressure of the compressor is raised, back pressure is increased, and efficient low-temperature refrigeration is achieved.

An ejector enhanced auto-cascade steam compressing type refrigeration cycle system comprises a compressor, a condenser and a gas-liquid separator which are connected in sequence. An outlet of the gas-liquid separator is divided into two paths, one saturated refrigerant liquid outlet is connected with a work fluid inlet of an ejector, and the other saturated refrigerant gas outlet is connected with a condensation side inlet of an evaporation condenser. A condensation side outlet of the condenser is connected with an inlet of an expansion valve, an outlet of the expansion valve is connected with an inlet of the evaporator, an outlet of the evaporator is connected with a driving fluid inlet of the ejector, an outlet of the ejector is connected with an evaporation side inlet of the evaporation condenser, an evaporation side outlet of the evaporation condenser is connected with a gas suction opening of the compressor, and a cycle is completed. The ejector is used in the auto-cascade steam compressing type refrigeration cycle system for replacing an expansion valve or a capillary tube to recycle part of expansion power in the throttling process, the gas suction pressure of the compressor is improved, and therefore power consumption of the compressor in the cycle is reduced, the gas conveying amount of the compressor is improved, and the performance of the auto-cascade steam compressing type refrigeration cycle system is effectively improved.

The invention provides an air conditioner system and a control method thereof. The air conditioner system comprises a compressor (1), an outdoor heat exchanger (2) and an indoor heat exchanger (3); an ejector (4) is further arranged between the outdoor heat exchanger (2) and the indoor heat exchanger (3); a gas-liquid separator (5) is further arranged between the ejector (4) and the indoor heat exchanger (3); and a liquid outlet (53) of the gas-liquid separator (5) is connected to the indoor heat exchanger (3). A refrigerant ejected out by the ejector is ejected into the gas-liquid separator to be subjected to gas-liquid separating, separated gas enters the compressor, and separated liquid enters the indoor heat exchanger, so that the dryness of the refrigerant entering the evaporator is effectively reduced, the heat exchanging efficiency of the evaporator is effectively improved, and the refrigeration capacity and refrigeration efficiency especially under the high temperature environment are improved.

The invention belongs to the technical field of air conditioners and particularly relates to an air conditioning system. In order to effectively improve cooling / heating effect of an air conditioner and reduce energy consumption, the air conditioning system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, an auxiliary heat exchanger and an ejector; the compressor, the outdoor heat exchanger, the auxiliary heat exchanger, the indoor heat exchanger and the ejector form a coolant cycle main loop; the compressor, the outdoor heat exchanger / indoor heat exchanger, the auxiliary heat exchanger and the ejector form a coolant cycle branch loop; in cooling / heating cycle, part of a coolant from the compressor flows into the ejector along the main loop, the other part of thecoolant flows into the ejector along the branch loop, and the two parts of the coolant are mixed in the ejector before the mixture reflows into the compressor. The auxiliary heat exchanger is used toimprove the supercooling effect of the coolant; the ejector is used to increase the suction pressure of the compressor, arriving at pressure increasing and efficiency improving; the cooling effect ofthe air conditioner in a high temperature environment and the heating effect thereof in a low temperature environment are improved, and energy consumption is reduced.

The vapor-liquid separation type two-phase liquid separator includes mainly liquid inlet pipe, vertical vapor-liquid separator, liquid separating port and vapor bypass tube. The liquid inlet pipe enters the vapor-liquid separator from its upper part and reaches its bottom. The vapor-liquid separator has liquid separating port installed on the bottom and vapor bypass tube installed in the top. In the present invention, the two phase flow is first vapor-liquid separately, only the separated refrigerant is then divided, and the separated refrigerant vapor in bypassed directly to the outlet of the evaporator. Unlike traditional two-phase liquid separator, which has flow rate distribution affected by the instability and uncertainty of the two-phase flow, the present invention has high design efficiency of air conditioner. In addition, the decrease of evaporator flow rate is favorable to raising energy efficiency of the air conditioner.

The invention discloses a cold water air conditioner system comprising a plate-type evaporator, a compressor and a condenser. The plate-type evaporator, the compressor and the condenser are connected through a pipeline. A temperature sensor and a pressure sensor are mounted on an air suction pipeline of the compressor. A bypass pipeline is connected on an outlet pipeline of the compressor. The other end of the bypass pipeline communicates with an inlet pipeline of the plate-type evaporator. An electromagnetic valve is mounted on the bypass pipeline. When the actual superheat degree is smaller than the standard superheat degree and the air suction pressure is smaller than the standard air suction pressure, the electromagnetic valve is opened. When the actual superheat degree is larger than or equal to the standard superheat degree or the air suction pressure is larger than or equal to the standard air suction pressure, the electromagnetic valve is opened. A pressure balancing valve is not adopted to preventing ice blockage any more but a common electromagnetic valve is adopted to achieve the ice blockage preventing effect, so that the ice blockage preventing cost is reduced greatly. Compared with the pressure balancing valve, the electromagnetic valve is higher in precision, smaller in weight and more precise in controlling, it is guaranteed that the interior of the evaporator is free from icing, and the ice blockage phenomenon of the plate-type evaporator is removed thoroughly.

The invention provides a heat pump system. In a heating mode, a second reversing module communicates a second port of a first heat exchanger with an inlet of a heating sprayer, and communicates an outlet of a throttling device with a second port of a second heat exchanger; and in a refrigerating mode, the second reversing module communicates the second port of the second heat exchanger with an inlet of a refrigerating sprayer, and communicates the outlet of the throttling device with a second port of the first heat exchanger. The heating sprayer and the refrigerating sprayer are respectively designed according to the demands of heating working conditions and refrigeration working conditions, and can adapt to the demands of the heating working conditions and the refrigeration working conditions; and the heat pump system switches the heating sprayer of the refrigerating sprayer to enter a cycle through the second reversing module according to the working conditions, can respectively recover the expansion power through the heating sprayer and the refrigerating sprayer to reduce the power of a compressor, and totally improves the energy efficiency.

The invention relates to the field of heat pump air-cooling type air conditioners, in particular to a control method for an intelligent frost-free air conditioner. The control method is characterized by comprising the following steps: arranging a storage tank with two channels in advance at first, wherein the two channels are respectively connected with an air suction end and an air discharge end of a compressor; preparing a low pressure detector and a high pressure detector in a control system, and respectively placing the low pressure detector and the high pressure detector on an air suction pipe and an air discharge pipe of the compressor; setting a low air pressure value and a high air pressure value in a control program; and controlling opening or closing of two valves by using the control program through the air pressure values acquired by the detectors according to the set air pressure values. When the air conditioner runs in a heating mode in a low-temperature environment, evaporating temperature and pressure of an outdoor heat exchanger are gradually reduced due to temperature and humidity of the environment, when the evaporating temperature and the pressure of the outdoor heat exchanger are reduced to set standard values, the low pressure valve is opened, and a refrigerant in the storage tank enters a compression circulation system to guarantee that the outdoor heat exchanger always works in a frost-free state. The comfort level of the air conditioner is improved, the efficiency is improved, and energy is saved.

The invention provides an air-conditioning system. The air-conditioning system comprises a compressor, two four-way valves, a condenser, two heat exchangers, an ejector, three throttling devices and two electromagnetic valves, wherein a first connector of the first four-way valve is communicated with an exhausting end of the compressor; a second connector of the first four-way valve is communicated with a first connector of the second four-way valve; a third connector of the first four-way valve is communicated with an injection opening of the ejector; a fourth connector of the first four-way valve is communicated with the low-temperature heat exchanger; a second connector of the second four-way valve is communicated with the condenser; a third connector of the second four-way valve is communicated with an entrance port of the ejector; a fourth connector of the second four-way valve is communicated with the high-temperature heat exchanger; the condenser, the high-temperature heat exchanger and the low-temperature heat exchanger are communicated to one another through the first throttling device, the second throttling device and the third throttling device respectively; and an inlet of the compressor is communicated with the injection opening and the entrance port of the ejector through the first electromagnetic valve and the second electromagnetic valve respectively and is communicated with an outlet of the ejector. By using the air-conditioning system, the energy utilization rate can be increased, and the comfort level of a room is improved.

The invention discloses a rotary compressor with an air suction turbocharging mechanism. The rotary compressor comprises a sealed shell, a gas-liquid separator, an exhaust pipe and the air suction turbocharging mechanism, wherein the sealed shell is internally provided with a motor assembly and a compression pump assembly; the gas-liquid separator is communicated with the compression pump assembly through an air inlet elbow; the exhaust pipe is arranged at the upper end of the sealed shell; the motor assembly comprises a stator and a rotor, and a rotating shaft of the compressor is driven by the rotor to rotate; the compression pump assembly comprises an upper flange, an air cylinder, and a lower flange arranged along the axial direction of the rotating shaft of the compressor and a roller arranged on the rotating shaft of the compressor, and the air cylinder is provided with an air inlet pipeline connected with the air inlet elbow; and the air suction turbocharging mechanism comprises turbine blades located in the air inlet pipeline, a blade shaft for mounting the turbine blades and a driving part connecting the blade shaft and the rotating shaft of the compressor. By using a turbocharging way, the air suction pressure of the compressor is increased, the influence of clearance volume to sucked air backflow is reduced, and the volume efficiency of a pump body is increased, so that the performance of the compressor is improved.

The invention discloses a low-temperature heat pump circulation system suitable for large temperature span and a circulation method. The system uses two compressors, namely the low-pressure side compressor and the high-pressure side compressor; exhaust of the high and low pressure compressors forms two different condensation temperatures, and the requirement for large-temperature-span heat supplyis met; the circulation can be independently operated through the two compressors, two independent systems are coupled through an ejector, the operation reliability of the systems is improved, and thelarge-temperature-span heat supply is achieved through gradient heating at the double condensation temperatures; meanwhile, through the ejector, the air suction pressure of the low-pressure side compressor can be improved, the air suction pressure of the high-pressure side compressor is controlled through middle flash evaporation, and therefore the pressure ratio of the two compressors is reduced, the operation at the low environment temperature is adapted, and the overall performance of the system is improved; and in addition, due to the fact that the evaporation temperatures of two evaporators are different due to the pressure increasing effect of the ejector, irreversible losses in the heat transfer process between a refrigerant and a heat source are reduced, and the system performanceis improved.

The invention discloses an electric vehicle heat pump type air conditioning system with an ejector. A first four-way reversing valve and a second four-way reversing valve are separately arranged in the system as a refrigerant flow path switching valve group, and the ejector with a double-loop form is used for recovering expansion work in the throttling process, and the operation of the system in different modes of cooling, heating and defrosting is achieved. The electric vehicle heat pump type air conditioning system with the ejector adopts the ejector to realize the expansion work recovery inthe throttling process, and simultaneously increases the suction pressure of a compressor, thereby improving the refrigeration and heating capacity of the system as well as the refrigeration and heating efficiency; and the electric vehicle heat pump type air conditioning system with the ejector especially solves the problem of too low suction pressure of the operation of a heat pump under the lowtemperature working condition, and increases cycle economy.