Ejector throttling air supply system and heat pump or refrigeration system air supply method

Abstract

The invention relates to an ejector throttling and vapor supplementing system. The system comprises a vapor supplementing compressor, a condenser, a first ejector, a flash evaporator or an economizer, a second ejector, a vapor-liquid separator and an evaporator which form a closed circulation circuit, wherein the first ejector is connected in series between the outlet of the condenser and the inlet of the flash evaporator or the inlet of the auxiliary economizer; the ejection inlet of the first ejector is connected with the vapor outlet of the vapor-liquid separator; a second ejector is connected in series between the liquid outlet of the flash evaporator or the economizer and the inlet of the vapor-liquid separator; the ejection inlet of the second ejector is connected with the outlet of the evaporator; the outlet of the compressor is connected with the inlet of the condenser; and the vapor outlet of the vapor-liquid separator is connected with the vapor suction port of the compressor. The ejectors which have a simple structure and low cost, are not provided with moving parts and have high adaptability to the two-phase flow working condition are used for replacing a throttling device, so that the performance of the system can be integrally improved.

Description

Technical field

[0001] The invention relates to the technical field of refrigeration and air conditioning, in particular to a throttling air supply system and a heat pump or refrigeration system air supply method suitable for air source heat pump systems and refrigeration equipment.

Background technique

[0002] The heating capacity of existing air source heat pumps tends to attenuate with the decrease of outdoor ambient temperature. In order to improve the heating performance, the low-temperature heat pump system generally adopts the method of intermediate air supply compressor to improve the heating capacity of the low temperature system, mainly including the intermediate air supply system of the flasher. and economizer make-up air system, see figure 1 and figure 2 , which includes a closed cycle loop composed of compressor 205, condenser 206, evaporator 208, throttle valve F1 and throttle valve F2, flasher 200 or economizer 201, so that the compressor operates accor...

Examples

Embodiment 1

[0028] For example one, please refer to image 3 , The system consists of a compressor 105, a condenser 106, a first ejector 101, a flasher 103, a second ejector 102, a gas-liquid separator 107, a throttling device, and an evaporator 108. The high-temperature and high-pressure refrigerant vapor 4 discharged from the compressor transfers heat to the brine through the condenser 106 and can be used for room heating or as domestic hot water. The high-pressure refrigerant liquid 5 coming out of the condenser 106 enters the first ejector 101 as a working fluid, injects the low-temperature and low-pressure refrigerant vapor 1 coming out of the gas-liquid separator 107, and is throttled, mixed, and diffused by the first ejector 101. After being pressurized, it enters the flasher 103, and the medium-pressure refrigerant vapor at the upper part enters the air supply port 109 of the compressor, and the medium-pressure refrigerant liquid at the lower part is used as the working fluid of t...

Embodiment 2

[0029] Embodiment 2 Please refer to Figure 5 , similar to Embodiment 1, the economizer 104 system is used to replace the flasher 103 system, and a part of the subcooled liquid refrigerant 5 coming out of the condenser 106 is throttled by the first injector 101 6 and mixed with the injection fluid 7, diffused 8 and then enter the economizer 104 to absorb heat and become refrigerant vapor 9 and then enter the air supply port of the compressor.

[0030] see Figure 6 In the third embodiment, on the basis of the second embodiment, two-stage compression is used to replace the original quasi-two-stage compression system. A small part of the refrigerant vapor 1 at the outlet of the gas-liquid separator 107 is ejected by the first injector 101, and the main part is ejected by the first ejector 101. The low-pressure compressor 112 sucks in, compresses and discharges 2 and the refrigerant vapor 9 from the economizer 104 mixes 3 and enters the suction port of the high-pressure compress...

Technical field

[0001] The invention relates to the technical field of refrigeration and air conditioning, in particular to a throttling air supply system and a heat pump or refrigeration system air supply method suitable for air source heat pump systems and refrigeration equipment.

Background technique

[0002] The heating capacity of existing air source heat pumps tends to attenuate with the decrease of outdoor ambient temperature. In order to improve the heating performance, the low-temperature heat pump system generally adopts the method of intermediate air supply compressor to improve the heating capacity of the low temperature system, mainly including the intermediate air supply system of the flasher. and economizer make-up air system, see figure 1 and figure 2 , which includes a closed cycle loop composed of compressor 205, condenser 206, evaporator 208, throttle valve F1 and throttle valve F2, flasher 200 or economizer 201, so that the compressor operates accor...

Examples

Embodiment 1

[0028] For example one, please refer to image 3 , The system consists of a compressor 105, a condenser 106, a first ejector 101, a flasher 103, a second ejector 102, a gas-liquid separator 107, a throttling device, and an evaporator 108. The high-temperature and high-pressure refrigerant vapor 4 discharged from the compressor transfers heat to the brine through the condenser 106 and can be used for room heating or as domestic hot water. The high-pressure refrigerant liquid 5 coming out of the condenser 106 enters the first ejector 101 as a working fluid, injects the low-temperature and low-pressure refrigerant vapor 1 coming out of the gas-liquid separator 107, and is throttled, mixed, and diffused by the first ejector 101. After being pressurized, it enters the flasher 103, and the medium-pressure refrigerant vapor at the upper part enters the air supply port 109 of the compressor, and the medium-pressure refrigerant liquid at the lower part is used as the working fluid of t...

Embodiment 2

[0029] Embodiment 2 Please refer to Figure 5 , similar to Embodiment 1, the economizer 104 system is used to replace the flasher 103 system, and a part of the subcooled liquid refrigerant 5 coming out of the condenser 106 is throttled by the first injector 101 6 and mixed with the injection fluid 7, diffused 8 and then enter the economizer 104 to absorb heat and become refrigerant vapor 9 and then enter the air supply port of the compressor.

[0030] see Figure 6 In the third embodiment, on the basis of the second embodiment, two-stage compression is used to replace the original quasi-two-stage compression system. A small part of the refrigerant vapor 1 at the outlet of the gas-liquid separator 107 is ejected by the first injector 101, and the main part is ejected by the first ejector 101. The low-pressure compressor 112 sucks in, compresses and discharges 2 and the refrigerant vapor 9 from the economizer 104 mixes 3 and enters the suction port of the high-pressure compress...

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