阅读说明：本技术 制冷系统 (Refrigeration system ) 是由 孟庆良 宋强 谭雪艳 刘江彬 刘景升 王冰 于 2019-04-18 设计创作，主要内容包括：本发明属于制冷技术领域,旨在解决现有制冷系统中将引射器设置在压缩机的进气口处易影响压缩机的运行稳定性和运行安全性的问题。为此,本发明提供了一种制冷系统,制冷系统包括蒸发器、冷凝器、节流装置、压缩机、经济器和引射器,冷凝器、经济器、节流装置、蒸发器、压缩机和引射器共同构成闭环的冷媒循环回路,引射器与经济器连接,引射器设置在压缩机的排气侧。本发明在使制冷系统实现双级增压的同时,不会由于引射器的气流不稳定,而影响压缩机运行的稳定性,同时不会对压机油的性质产生影响,不会影响压缩机运行的安全性。(The invention belongs to the technical field of refrigeration, and aims to solve the problem that the operation stability and the operation safety of a compressor are easily influenced when an ejector is arranged at an air inlet of the compressor in the conventional refrigeration system. Therefore, the invention provides a refrigerating system which comprises an evaporator, a condenser, a throttling device, a compressor, an economizer and an ejector, wherein the condenser, the economizer, the throttling device, the evaporator, the compressor and the ejector form a closed-loop refrigerant circulation loop together, the ejector is connected with the economizer, and the ejector is arranged on the exhaust side of the compressor. The invention can not affect the stability of the operation of the compressor due to the unstable airflow of the ejector, and can not affect the property of the compressor oil and the safety of the operation of the compressor while realizing the two-stage pressurization of the refrigerating system.)

1. The refrigerating system is characterized by comprising an evaporator, a condenser, a throttling device, a compressor, an economizer and an ejector, wherein the condenser, the economizer, the throttling device, the evaporator, the compressor and the ejector jointly form a closed-loop refrigerant circulation loop, the ejector is connected with the economizer, and the ejector is arranged on the exhaust side of the compressor.

2. The refrigeration system according to claim 1, further comprising a gas-liquid separator connected to the refrigerant circulation circuit, the gas-liquid separator being disposed between the evaporator and the compressor.

3. The refrigeration system of claim 1, further comprising an oil separator connected to the refrigerant circulation loop, the oil separator disposed between the compressor and the ejector.

4. The refrigerant system as set forth in claim 1, wherein said throttling device is disposed between said economizer and said evaporator.

5. The refrigerant system as set forth in claim 1, wherein said throttling device is disposed between said economizer and said condenser.

6. A refrigeration system as claimed in any of claims 1 to 5, wherein the restriction device is an electronic expansion valve.

Technical Field

The invention belongs to the technical field of refrigeration, and particularly provides a refrigeration system.

Background

The refrigeration system is a system capable of reducing indoor environment temperature, the refrigeration system is generally applied to markets, office buildings and the like, in hot summer, the indoor environment temperature of the markets, the office buildings and the like is very high, the user experience is influenced, the refrigeration system is required to be used for cooling the indoor environment at this time, and the evaporation temperature range set during refrigeration is generally-10 ℃ to-25 ℃.

Disclosure of Invention

In order to solve the problems in the prior art, namely to solve the problem that the operation stability and the operation safety of a compressor are easily influenced when an ejector is arranged at an air inlet of the compressor in the conventional refrigeration system, the invention provides the refrigeration system.

In the preferable technical scheme of the refrigeration system, the refrigeration system further comprises a gas-liquid separator, the gas-liquid separator is connected to the refrigerant circulating loop, and the gas-liquid separator is arranged between the evaporator and the compressor.

In the preferable technical scheme of the refrigeration system, the refrigeration system further comprises an oil separator, the oil separator is connected to the refrigerant circulating loop, and the oil separator is arranged between the compressor and the ejector.

In a preferred embodiment of the above refrigeration system, the throttling device is disposed between the economizer and the evaporator.

In a preferred embodiment of the above refrigeration system, the throttling device is disposed between the economizer and the condenser.

In a preferred embodiment of the above refrigeration system, the throttling device is an electronic expansion valve.

The ejector is arranged on the exhaust side of the compressor, so that the refrigerating system can realize double-stage pressurization, the stability of the operation of the compressor cannot be influenced due to unstable airflow of the ejector, the property of the compressor oil cannot be influenced, and the safety of the operation of the compressor cannot be influenced.

Drawings

FIG. 1 is a schematic diagram of the construction of the refrigeration system of the present invention;

FIG. 2 is a table of refrigeration data for a typical prior art refrigeration system;

FIG. 3 is a table of refrigeration data for a prior art two-stage compression refrigeration system;

FIG. 4 is a table of refrigeration data for a prior art refrigeration system utilizing vapor-filling enthalpy-increasing compression;

FIG. 5 is a table of refrigeration data for a prior art refrigeration system having an ejector located on the inlet side of the compressor;

fig. 6 is a table of refrigeration data for a refrigeration system having an ejector located on the discharge side of the compressor in accordance with the present invention.

Reference numerals:

1. an evaporator; 2. a condenser; 3. a throttling device; 4. a compressor; 5. an economizer; 6. an ejector; 7. a gas-liquid separator; 8. an oil separator.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

Based on the problem that the running stability and running safety of a compressor are easily affected when an ejector is arranged at an air inlet of the compressor in the conventional refrigerating system pointed out by the background art, the invention provides a refrigerating system, which aims to realize double-stage pressurization through the ejector, simultaneously avoid the influence on the running stability of the compressor due to unstable airflow of the ejector, avoid the influence on the properties of compressor oil and avoid the influence on the running safety of the compressor.

Specifically, as shown in fig. 1, the refrigeration system of the present invention includes an evaporator 1, a condenser 2, a throttling device 3, a compressor 4, an economizer 5, and an ejector 6, the condenser 2, the economizer 5, the throttling device 3, the evaporator 1, the compressor 4, and the ejector 6 together form a closed-loop refrigerant circulation circuit, the ejector 6 is connected to the economizer 5, and the ejector 6 is disposed on an exhaust side of the compressor 4. Wherein, condenser 2 is connected with economizer 5 through the pipeline, economizer 5 is connected with evaporimeter 1 through the pipeline, evaporimeter 1 is connected with compressor 4 through the pipeline, compressor 4 is connected with ejector 6 through the pipeline, ejector 6 is connected with condenser 2 through the pipeline, throttling arrangement 3 can be connected between evaporimeter 1 and economizer 5, also can connect between condenser 2 and economizer 5, through such setting, make condenser 2, economizer 5, throttling arrangement 3, evaporimeter 1, compressor 4 and ejector 6 can constitute closed-loop refrigerant circulation circuit jointly. Besides, the economizer 5 is connected with the ejector 6 through an independent pipeline, in the process of refrigerating the refrigerating system, a liquid-phase refrigerant from the condenser 2 is divided into two parts in the economizer 5, the first part of the refrigerant continuously flows to the evaporator 1, the second part of the refrigerant is divided to the ejector 6, the first part of the refrigerant is changed into a gas-phase refrigerant after passing through the evaporator 1, the gas-phase refrigerant is changed into a high-pressure gas-phase refrigerant after continuously passing through the compressor 4, the ejector 6 receives the second part of the refrigerant from the economizer 5 and the high-pressure gas-phase refrigerant from the compressor 4, wherein the pressure of the second part of the refrigerant from the economizer 5 is smaller than that of the high-pressure gas-phase refrigerant from the compressor 4, the refrigerants with different pressures and different phases are mixed in the ejector 6, and the ejector 6 generates a mixing shock wave phenomenon, so that the pressure of the ejector 6 is increased, under the combined action of the compressor 4, a two-stage supercharging effect is formed. It should be noted that the economizer 5 is a heat exchanger, and functions to absorb heat through throttling evaporation of the refrigerant itself, so as to supercool another part of the refrigerant.

Preferably, the refrigeration system further includes a gas-liquid separator 7, the gas-liquid separator 7 is connected to the refrigerant circulation circuit, and the gas-liquid separator 7 is disposed between the evaporator 1 and the compressor 4. That is, the gas-liquid separator 7 is provided on the intake side of the compressor 4 and on the exhaust side of the evaporator 1, and by this arrangement, the intake side of the compressor 4 is prevented from sucking the liquid-phase refrigerant by the gas-liquid separator 7 to cause liquid slugging, thereby damaging the compressor 4.

Preferably, the refrigeration system further includes an oil separator 8, the oil separator 8 is connected to the refrigerant circulation circuit, and the oil separator 8 is disposed between the compressor 4 and the ejector 6. That is, the oil separator 8 is disposed on the exhaust side of the compressor 4 and on the intake side of the ejector 6, and during the operation of the compressor 4, the refrigerant and the lubricating oil in the compressor 4 are vaporized into a mixture, and after the mixture leaves the compressor 4, the lubricating oil in the compressor 4 is reduced, and through the action of the oil separator 8, the lubricating oil can be returned to the oil storage tank of the compressor 4, thereby preventing the compressor 4 from being out of order due to lack of the lubricating oil, and prolonging the service life of the compressor 4.

In the present invention, the throttling device 3 may be an electronic expansion valve, a manual expansion valve, a capillary tube, etc., and those skilled in the art can flexibly set the specific structure of the throttling device 3 in practical application, and such adjustment and change of the specific structure of the throttling device 3 do not limit the present invention, and should be limited within the protection scope of the present invention.

Through repeated tests, comparison and analysis of the inventor, compared with a common refrigeration system, a two-stage compression refrigeration system, an air-supplementing enthalpy-increasing compression refrigeration system and a refrigeration system with an ejector 6 arranged on the air inlet side of a compressor 4 in the prior art, the energy efficiency ratio of the refrigeration system is remarkably improved. Because the set evaporation temperature interval is generally-10 ℃ to-25 ℃ when the refrigeration system is used for refrigeration, four evaporation temperature values of-10 ℃, 15 ℃, 20 ℃ and-25 ℃ are selected to compare and analyze the energy efficiency ratio of the refrigeration system with the energy efficiency ratio of the refrigeration system in the prior art.

As shown in fig. 2 and 6, the energy efficiency ratio of the refrigeration system of the present invention is greatly improved compared to the energy efficiency ratio of the ordinary refrigeration system in the prior art, and the improved energy efficiency ratio can be calculated to be up to 18%.

As shown in fig. 3 and 6, the energy efficiency ratio of the refrigeration system of the present invention is greatly improved compared to the energy efficiency ratio of the refrigeration system of the two-stage compression in the prior art, and the improved energy efficiency ratio can be calculated to be up to 12.7%.

As shown in fig. 4 and 6, the energy efficiency ratio of the refrigeration system of the present invention is significantly improved compared to the energy efficiency ratio of the refrigeration system of the prior art with vapor-filling enthalpy-increasing compression, and the improved energy efficiency ratio can be calculated to be up to 2.54%.

As shown in fig. 5 and 6, compared with the energy efficiency ratio of the refrigeration system in which the ejector 6 is disposed on the air inlet side of the compressor 4 in the prior art, the energy efficiency ratio of the refrigeration system of the present invention is significantly improved, and the improved energy efficiency ratio can be calculated to be up to 1.67%.

Therefore, the refrigerating system can realize double-stage pressurization, compared with the refrigerating system in which the ejector 6 is arranged on the air inlet side of the compressor 4 in the prior art, the refrigerating system cannot influence the running stability of the compressor 4 due to unstable airflow of the ejector 6, cannot influence the property of compressor oil, and cannot influence the running safety of the compressor 4, and the energy efficiency ratio of the refrigerating system in the refrigerating process is obviously higher than that of any type of refrigerating system in the prior art, so that the refrigerating system is ensured to have high refrigerating capacity, and is more energy-saving.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.