The biphase gas and liquid flow injector synergism refrigerating system that is used for two warm derect refrigerated refrigerators
Technical field
The invention belongs to the refrigerator refrigeration technology field, be specifically related to a kind of biphase gas and liquid flow injector synergism refrigerating system for two temperature derect refrigerated refrigerators.
Background technology
Current, refrigerator is one of the most frequently used household electrical appliance.Due to the household electric refrigerator all weather operations, therefore occupied sizable ratio in household electricity, thereby made the power saving of refrigerator become extremely outstanding.Be accompanied by the raising of refrigerator Energy Efficiency Standard, and in order to reduce energy Consumption of Refrigerator, be the research topic of domestic and international extensive concern in the relevant power-saving technology of refrigerator field development always.Therefore, development refrigerator New Refrigerating technology improves the refrigerator energy-saving horizontal, will promote China's refrigerator product competitiveness in the international market, and then produce huge economy and environment benefit, meanwhile can also bring positive social benefit.
At present, the two temperature refrigerators that comprise refrigerating chamber and two storerooms of refrigerating chamber can satisfy people the requirement of different preservation temperature, economic and practical advantage at home and abroad are widely applied owing to having.In various types of two warm refrigerators, the two warm refrigerators of the direct-cooling type market that has a wide range of applications wherein.At present, what the refrigeration system of the two warm refrigerators of direct-cooling type mainly adopted is the single loop endless form, and the critical piece of system comprises compressor, condenser, device for drying and filtering, capillary, refrigerator evaporator and freezer evaporator.This system makes refrigerating chamber and freezer evaporator remain on identical evaporating temperature by a capillary throttling action, through the refrigeration of two evaporimeters, realizes refrigerating chamber and refrigerating chamber temperature requirement separately.Yet, because temperature of refrigerating chamber is high, and relatively low by the evaporating temperature of capillary-compensated realization, therefore cause the refrigerator evaporator heat transfer temperature difference large, the irreversible heat transfer loss is significantly.On the other hand, adopt capillary to realize also having produced larger irreversible loss in the throttling process of cold-producing medium, also make the efficiency of refrigeration system reduce.
In fact, the throttling process of cold-producing medium has the expansion work of recoverable, the demi-inflation merit that can adopt additional injector to reclaim throttling process in the refrigerator vapor compression type refrigerating system is used for reducing the wasted work of compressor, and the refrigeration performance of refrigeration system is improved.Before this, existing researcher has proposed injector is introduced steam compressed refrigerating circulating system both at home and abroad, consists of multi-form compression/injecting type hybrid refrigeration cycle and is applied to air-conditioner, heat pump and two temperature refrigerator.In the compression that is applied to two warm refrigerators of these propositions/injecting type hybrid refrigeration cycle system schema, mainly include the compression of two-storage temperature refrigerator refrigerating chamber and freezer evaporator series and parallel connections/injecting type hybrid refrigeration cycle dual mode.Yet, in these endless form, employing be conventional gas-gas type injector, namely working fluid and driven fluid are gas phase; Use this gas-gas type injector in the circulatory system, also insufficient to the expansion work of cold-producing medium throttling process in recovery of circulatory system, thereby improve aspect systematic function limited in one's ability.In fact, the cooling cycle system characteristics based on the two warm refrigerators of direct-cooling type can adopt solution-air two facies pattern injectors, and namely working fluid is gas-liquid two-phase mix refrigerant and driven fluid is vapor phase refrigerant; Adopt the expansion work of cold-producing medium throttling process in recovery of circulatory system to greatest extent of solution-air two facies pattern injectors in the circulatory system, thereby the refrigeration performance of cooling cycle system is significantly improved.Therefore, a kind of feasible solution that the technology of the present invention provides, i.e. a kind of gas-liquid two-phase injector synergism refrigerating circulatory system has positive impetus to the development of two temperature derect refrigerated refrigerator product power-saving technologies.
Summary of the invention
For solving defective and the deficiency that exists in above-mentioned prior art, the object of the present invention is to provide a kind of biphase gas and liquid flow injector synergism refrigerating system for two temperature derect refrigerated refrigerators, utilize the gas-liquid two-phase flow injector fully to reclaim the expansion work of cold-producing medium throttling process in refrigeration system, thereby and utilize the pressurization of gas-liquid two-phase flow injector significantly to promote the displacement that suction pressure of compressor reduces the power consumption of compressor in circulation and improves compressor; And can realize that refrigerating chamber and freezer evaporator maintain different evaporating temperatures and freeze simultaneously, the significant pressurization of solution-air two-phase injector has effectively been improved the performance of two temperature derect refrigerated refrigerator cooling cycle systems.
For achieving the above object, the technical solution adopted in the present invention is:
The biphase gas and liquid flow injector synergism refrigerating system that is used for two warm derect refrigerated refrigerators, compressor 101, condenser 102, device for drying and filtering 103, the first capillary 104 are connected with refrigerator evaporator successively and are connected, the outlet of refrigerator evaporator 105 is connected with air and liquid mixer 110 entrances of injector 106, being connected by the outlet of injection refrigerant inlet with freezer evaporator 109 of injector 106, the outlet of injector 106 is connected with the entrance of gas-liquid separator 107; Gas-liquid separator 107 outlet minute two-way, one road saturated gaseous state refrigerant outlet is connected with compressor 101 entrances by the compressor suction duct that the backheat effect is arranged, and the saturated liquid refrigerant outlet in another road is connected with freezer evaporator 109 entrances after through the second capillary 108; Described injector 106 is the biphase gas and liquid flow injector, and namely its working fluid is the gas-liquid two-phase mix refrigerant from refrigerator evaporator 105 outlets.
In described injector 106 directly from the gas-liquid two-phase mix refrigerant pressure of refrigerator evaporator 105 outlets greater than from freezer evaporator 109 refrigerant vapour pressure out.
The outlet refrigerant vapour of described freezer evaporator 109 by the gas-liquid two-phase mix refrigerant injection that directly exports from refrigerator evaporator 105, mixes rear supercharging and enters gas-liquid separator 107 in injector 106 in injector 106.
Described injector 106 comprises air and liquid mixer 110 and the nozzle 111 that is connected, and described nozzle 111 is arranged in suction chamber 112, and suction chamber 112 is connected with diffuser with mixing chamber 113 and is connected successively.
Than the existing injector synergy circulatory system for two temperature refrigerators, the present invention has following advantage:
1, the biphase gas and liquid flow injector synergism refrigerating circulatory system of the present invention utilizes the biphase gas and liquid flow injector can fully reclaim expansion work in refrigeration system throttling process.this is because all can satisfy the requirement of refrigerating chamber cooling load from condenser and through cold-producing medium capillaceous in the evaporation of refrigerator evaporator part, and the gas-liquid two-phase mix refrigerant of refrigerator evaporator outlet is all as the working fluid of injector, go injection from the freezer evaporator refrigerant vapour, the working fluid mass flow of injector and total enthalpy all obviously improve in this case, primary operating characteristics rule according to injector, this biphase gas and liquid flow injector can obtain larger step-up ratio, therefore thereby the biphase gas and liquid flow injector significantly promotes the displacement that suction pressure of compressor reduces the power consumption of compressor in circulation and improves compressor, effectively improved the cooling cycle system performance and can also realize that refrigerating chamber and refrigerating chamber freeze simultaneously under different evaporating temperatures.
2, with the injector of air and liquid mixer, can well realize the gas-liquid mixed uniformization effect by this air and liquid mixer, and then effectively bring into play the service behaviour of biphase gas and liquid flow injector.
System of the present invention is a kind of economy, effective, feasible improvement scheme, can effectively improve two warm derect refrigerated refrigerator cooling cycle system performances, promotes the development of household electric refrigerator product power-saving technology.
Description of drawings
Fig. 1 is cooling cycle system schematic diagram of the present invention.
Fig. 2 is emitter construction schematic diagram of the present invention.
Fig. 3 is the circulation pressure-enthalpy diagram (p – h figure) of the cooling cycle system course of work of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
as shown in Figure 1, the present invention is a kind of biphase gas and liquid flow injector synergism refrigerating system for two temperature derect refrigerated refrigerators, comprise compressor 101, the outlet of compressor 101 is connected with the entrance of condenser 102, the outlet of condenser 102 is connected with the entrance of device for drying and filtering 103, the outlet of device for drying and filtering 103 is connected with the entrance of the first capillary 104, described the first capillary 104 is through taking certain backheat mode (wound form with compressor suction duct, or formula is tied up in subsides, or bushing type) be connected with refrigerator evaporator 105 entrances after, refrigerator evaporator 105 outlets are connected with air and liquid mixer 110 entrances of injector 106, being connected with freezer evaporator 109 outlets by injection vapor phase refrigerant entrance of injector 106, injector 106 two phase refrigerant outlets are connected with the entrance of gas-liquid separator 107, gas-liquid separator 107 outlet minute two-way, one road saturated gaseous state refrigerant outlet via compressor suction duct and with the first capillary 104 backheats after directly be connected with compressor 101 entrances, the saturated liquid refrigerant outlet in another road is connected with freezer evaporator 109 entrances after through the second capillary 108, injector 106 is the biphase gas and liquid flow injector, and namely its working fluid is the gas-liquid two-phase mix refrigerant from refrigerator evaporator 105 outlets.
As shown in Figure 2, injector 106 of the present invention comprises air and liquid mixer 110 and the nozzle 111 that is connected, and described nozzle 111 is arranged in suction chamber 112, and suction chamber 112 is connected with diffuser with mixing chamber 113 and is connected successively.
as shown in Figure 3, circulation pressure-enthalpy diagram (p – h figure) for the cooling cycle system course of work of the present invention, the refrigeration system course of work of its signal is: isolated saturated gaseous refrigerant in gas-liquid separator 107 (locating for 7 in figure) via with the first capillary 104 backheats after enter compressor 101 entrances (locating in figure) at 1, boosting after compressed heats up becomes superheated vapor (locating in figure) at 2, becomes the subcooled liquid (locating in figure) of high pressure at 2 superheated vapor (locating in figure) is emitted heat in condenser 102 after at 3, enter the first capillary 104 from condenser 102 high-pressure sub-cooled liquid out through after device for drying and filtering 103, (locating for 4 in figure) enters refrigerator evaporator 105 after throttling and backheat realize the step-down cooling, and the heat absorption evaporation realizes the refrigeration purpose in refrigerator evaporator 105, the gas-liquid two-phase mix refrigerant (locating for 5 in figure) of refrigerator evaporator 105 outlets enters the air and liquid mixer 110 of injector 106 as working fluid, and after expanding, nozzle 111 becomes low-voltage high speed gas-liquid two-phase mix refrigerant (a 5 ' place in figure), from out refrigerant vapour of freezer evaporator 109 (in figure 10), after mixing in the mixing chamber 113 of injector 106, (a 6 ' place in figure) discharges (locating in figure) again at 6 after diffuser 114 superchargings of injector 106 at the further injection of suction chamber 112 of injector 106, the gas-liquid two-phase mix refrigerant of injector 106 outlets enters gas-liquid separator 107 and carries out gas-liquid separation, wherein return to compressor suction duct from the isolated saturated gaseous refrigerant of gas-liquid separator 107 (in figure) at 7, and isolated saturated liquid refrigerant (locating for 8 in figure) enters freezer evaporator 109 heat absorption evaporation realization refrigeration purposes by the second capillary 108 step-down coolings rear (locating in figure) at 9, the refrigerant vapour (locating for 10 in figure) of freezer evaporator 109 outlets is as being entered injector 106 by the injection refrigerant vapour, more than complete whole cyclic process.
Having four different operating pressures in whole system On The Cycle Working Process of the present invention, is condenser 102 condensing pressures, compressor 101 pressures of inspiration(Pi), refrigerator evaporator 105 evaporating pressures and freezer evaporator 109 evaporating pressures successively.Wherein condenser 102 condensing pressures, refrigerator evaporator 105 evaporating pressures and freezer evaporator 109 evaporating pressures are that working by the circulatory system is determined (i.e. a condensation temperature and two evaporating temperatures), and this depends on again cryogenic temperature requirement and air ambient temperature; Compressor 101 pressures of inspiration(Pi) are determined by the conservation of mass, the conservation of momentum and energy conservation relation in the operating characteristic of injector 106, circulation.