Ejector oil return capacity measuring system

Abstract

The utility model relates to the technical field of two-device manufacturing, in particular to a system for measuring the oil return capacity of an ejector. The system comprises a first branch, the first branch comprises a simulation condenser, a pressure regulating valve, a pressure sensor, a gas flowmeter and a first switch which are sequentially connected in the gas output direction, and the simulation condenser outputs gas; the second branch comprises a simulation evaporator, a pressure gauge, a liquid flowmeter, a second switch and an ejector which are sequentially connected in the oil liquid output direction, the ejector is provided with a jet flow end and a leading-in end, the first branch is connected with the jet flow end through the first switch, and the second branch is connected with the leading-in end through the second switch. The second branch is connected with the leading-in end through the second switch, oil in the simulation evaporator is led out by the ejector, the ejector oil return capacity measuring system can accurately measure the actual oil return amount of each gear of the ejector under each working condition, and the oil return capacity of the ejector is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to two ware manufacturing technical field, concretely relates to a kind of ejector oil return capacity measuring system. BACKGROUND

[0002] If there are more refrigeration oil inside evaporator, it will affect heat exchange effect, refrigeration oil density decreases, generally on the surface of liquid refrigerant, so through the way of ejector oil return, refrigeration oil on the surface of refrigerant inside evaporator can be ejected out in time, so as to ensure unit heat exchange effect.

[0003] At present, large water chiller adopts the way of ejector oil return to eject the oil accumulated in full liquid evaporator back to compressor, because the ejector ejecting process involves the interaction of complex two-phase fluid, the actual oil return amount of ejector cannot be effectively calculated, and the problem of insufficient oil return capacity caused by unreasonable selection of ejector often occurs. UTILITY MODEL CONTENT

[0004] The utility model aims at avoiding the deficiencies in the prior art and provides an ejector oil return capacity measuring system, which can accurately measure the actual oil return amount of each gear ejector under each working condition, and ensure the oil return capacity of the ejector.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A first branch is provided, the first branch includes analog condenser, pressure regulating valve, pressure sensor, gas flow meter, first switch connected in sequence, the analog condenser outputs gas and transmits along the direction of the first switch;

[0007] Specifically, the first branch is used for outputting high-pressure gas in condenser, wherein the condenser is an analog condenser simulating real condenser, the high-pressure gas in the analog condenser is adjusted to the working condition to be simulated through the pressure regulating valve, the pressure sensor detects the degree of high-pressure gas output by the analog condenser, and the high-pressure gas of the set working condition can be output by opening the first switch,

[0008] A second branch is provided, the second branch includes analog evaporator, pressure gauge, liquid flow meter, second switch connected in sequence,

[0009] Specifically, the second branch is used for outputting oil liquid in evaporator, wherein the evaporator is an analog evaporator simulating real evaporator,

[0010] An ejector is provided, the ejector is provided with jet flow end and introduction end, the first branch is connected with the jet flow end through the first switch, the second branch is connected with the introduction end through the second switch, and the oil liquid in the analog evaporator is ejected out along the direction of the second switch by the ejector.

[0011] Specifically, the simulation condenser transmits the high-pressure gas to the ejector, so as to simulate the pressure at the injection end of the ejector in the actual operation of the unit, and the ejector introduces the oil liquid in the simulation evaporator into the ejector, so that the two channels of the first branch and the second branch are finally mixed in the ejector and discharged.

[0012] In some embodiments, the simulation condenser is arranged as a condenser tank. Arranging it as a condenser tank facilitates the realization of the function of the condenser.

[0013] In some embodiments, the simulation evaporator is arranged as an evaporator tank. Arranging it as an evaporator tank facilitates the realization of the function of the evaporator.

[0014] In some embodiments, the pressure regulating valve is an electronic pressure regulating valve.

[0015] The electronic pressure regulating valve facilitates the adjustment of the corresponding pressure.

[0016] In some embodiments, the output port of the simulation evaporator is provided with a filter, and the simulation evaporator is connected to the pressure gauge through the filter.

[0017] The filter is used to filter impurities in the simulation evaporator, so as to avoid the impurities affecting the calculation error of the liquid flow meter and ensure the accuracy of the data measured by the liquid flow meter.

[0018] In some embodiments, the first switch is a first electromagnetic valve.

[0019] The first switch is arranged as a first electromagnetic valve, and the intelligent performance of the electromagnetic valve is high.

[0020] In some embodiments, the second switch is a second electromagnetic valve.

[0021] The second switch is arranged as a first electromagnetic valve, and the intelligent performance of the electromagnetic valve is high.

[0022] In some embodiments, the size of the simulation condenser is 1:1 reduced from the size of the actual condenser.

[0023] The size of the simulation condenser is 1:1 reduced from the size of the actual condenser, which ensures the accuracy of the simulation.

[0024] In some embodiments, the size of the simulation evaporator is 1:1 reduced from the size of the actual evaporator.

[0025] The size of the simulation evaporator is 1:1 reduced from the size of the actual condenser, which ensures the accuracy of the simulation.

[0026] In some embodiments, the oil in the simulated evaporator is drawn out by the ejector to the compressor.

[0027] The oil mixed into the evaporator is returned to the compressor.

[0028] The beneficial effects of the ejector oil return capacity measuring system of the utility model are:

[0029] The ejector oil return capacity measuring system of the utility model, before selecting the ejector, first connects the to-be-measured ejector to the simulated evaporator and the simulated condenser in the measuring system, opens the first switch in the first branch and adjusts the pressure regulating valve in the first branch, so that the working condition of the simulated condenser is realized, thereby simulating the ejector injection end pressure when the unit is actually running, opens the second switch in the second branch, reads the data of the gas flow meter and the liquid flow meter, so that the oil in the simulated evaporator is drawn out by the ejector, and the actual oil return amount of the ejector under the working condition is measured. Therefore, the sizes of the ejector injection flow of different models of ejectors under different working condition pressures are obtained, the selection of the ejector for different cold units is facilitated, and the oil return capacity of the ejector is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the structure schematic diagram of the ejector oil return capacity measuring system of the utility model embodiment.

[0031] REFERENCE NUMERALS

[0032] 1, simulated condenser; 2, pressure regulating valve; 3, pressure sensor; 4, gas flow meter; 5, first switch; 6, simulated evaporator; 7, pressure gauge; 8, liquid flow meter; 9, second switch; 10, ejector; 11, jet end; 12, introduction end; 13, filter; 14, compressor. DETAILED DESCRIPTION

[0033] The preferred embodiments of the utility model will be described in more detail below with reference to the drawings. Although the preferred embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to make the utility model more thorough and complete, and to fully convey the scope of the utility model to those skilled in the art.

[0034] The terms used in the utility model are only for the purpose of describing specific embodiments, and are not intended to limit the utility model. The singular form "a", "an" and "the" used in the utility model and the appended claims are also intended to include the plural form, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0035] It should be understood that although the terms "first", "second", "third", etc. can be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0036] Embodiment 1

[0037] If there is a lot of refrigeration oil inside the evaporator, the heat exchange effect will be affected, the density of the refrigeration oil will decrease, and the refrigeration oil will generally be on the surface of the liquid refrigerant. Therefore, by using the injection oil return method, the refrigeration oil on the surface of the refrigerant inside the evaporator can be injected out in time, thereby ensuring the heat exchange effect of the unit.

[0038] At present, the injection oil return method is used to inject the oil accumulated in the flooded evaporator back to the compressor 14. Since the injection process of the injector 10 involves the interaction of complex two-phase fluid, the actual oil return amount of the injector 10 cannot be effectively calculated, and the problem of insufficient oil return capacity caused by unreasonable selection of the injector 10 often occurs.

[0039] In view of the problem that the oil return amount of the injector 10 cannot be effectively calculated and simulated, an injector 10 oil return capacity measuring system is developed, as shown in Figure 1 The embodiment discloses an injector 10 oil return capacity measuring system, which comprises:

[0040] A first branch, the first branch comprises an analog condenser 1, a pressure regulating valve 2, a pressure sensor 3, a gas flow meter 4 and a first switch 5 connected in sequence in the gas output direction, and the analog condenser 1 outputs gas;

[0041] Specifically, the first branch is used to output high-pressure gas in the condenser, wherein the condenser is an analog condenser 1 simulating a real condenser, the high-pressure gas in the analog condenser 1 is adjusted to the working condition to be simulated through the pressure regulating valve 2, the pressure sensor 3 detects the degree of the high-pressure gas output by the analog condenser 1, and the high-pressure gas of the set working condition is output by opening the first switch 5,

[0042] That is, the simulation condenser 1 is a device for simulating the working state of a real condenser. In some experimental or test scenarios, it is not convenient to use a real condenser directly, or in order to study the performance of the condenser under certain working conditions, a flexible simulation device is needed. For example, when developing a new type of refrigerant or studying the impact of condenser structure improvement on performance, the simulation condenser 1 can provide a controllable experimental platform.

[0043] The pressure regulating valve 2 is a key component connected to the output end of the simulation condenser 1. Its function is to adjust the high-pressure gas in the simulation condenser 1 to the working condition pressure to be simulated. For example, if a condenser working condition with a normal operating pressure of 1.5 MPa is to be simulated, the pressure regulating valve 2 can adjust the gas with a higher pressure (such as 2.0 MPa) that may exist in the simulation condenser 1 to 1.5 MPa. The pressure regulating valve 2 achieves precise control of pressure by adjusting the opening of its internal valve, which can automatically or manually adjust the opening of the valve according to the set pressure value to achieve the required output pressure.

[0044] The pressure sensor 3 is installed at the output end of the simulation condenser 1 to detect the pressure of the high-pressure gas output by the simulation condenser 1. It can convert the pressure signal into an electrical signal in real time and feed it back to the control system. For example, after the pressure regulating valve 2 adjusts the pressure, the pressure sensor 3 can accurately measure the actual pressure of the output gas at that time. If the actual pressure deviates from the set simulation working condition pressure, the control system can further adjust the pressure regulating valve 2 according to the signal fed back by the pressure sensor 3 to make the pressure reach the precise set value. The accuracy of the pressure sensor 3 is crucial to the accuracy of the entire simulation system, so a high-precision pressure sensor 3 is usually selected to ensure the reliability of the measurement.

[0045] The first switch 5 is a key component for controlling the on-off of the high-pressure gas output by the simulation condenser 1. When it is necessary to output the high-pressure gas of the set working condition to the subsequent system or experimental device, the first switch 5 is turned on, and the high-pressure gas adjusted by the simulation condenser 1 through the pressure regulating valve 2 and confirmed by the pressure sensor 3 can be smoothly output. For example, in a performance test experiment of a refrigeration system, when the simulation condenser 1 has adjusted the gas to the required working condition pressure and the pressure sensor 3 shows that the pressure is stable, the first switch 5 is turned on, and these high-pressure gases of the set working condition can enter the evaporator or other related components after the condenser to perform subsequent experimental operations, such as testing the refrigeration effect, analyzing the system running stability, etc.

[0046] The second branch includes, in sequence along the oil liquid output direction, a simulation evaporator 6, a pressure gauge 7, a liquid flow meter 8, a second switch 9,

[0047] In particular, the second branch is used to output the oil liquid in the evaporator, wherein the evaporator is a simulation evaporator 6 simulating a real evaporator,

[0048] An ejector 10 is provided with a jet end 11 and an intake end 12, the first branch is connected with the jet end 11 through the first switch 5, the second branch is connected with the intake end 12 through the second switch 9, and the oil liquid in the simulation evaporator 6 is ejected by the ejector 10.

[0049] The simulation evaporator 6 is a device in the system for simulating the working state of a real evaporator. In many experimental or test scenarios, in order to study the performance of the evaporator, such as heat exchange efficiency, oil liquid flow characteristics, etc., a simulation evaporator 6 that can be flexibly controlled and adjusted is needed. It can produce oil liquid with certain temperature, pressure and flow rate, etc. These parameters can be set according to the needs of experiments or tests. For example, when studying the evaporation characteristics of new refrigerants in the evaporator, the simulation evaporator 6 can provide a stable oil liquid output environment to observe and analyze the evaporation process of the refrigerant.

[0050] A pressure gauge 7 is installed after the simulation evaporator 6, used to monitor the pressure of the oil liquid in the second branch in real time. It can visually display the pressure value of the oil liquid, providing important reference information for the running state of the system. For example, when the simulation evaporator 6 outputs oil liquid, the pressure gauge 7 can display the pressure of the oil liquid at this time. If the pressure is too high or too low, it may affect the normal work of subsequent equipment, such as the measurement accuracy of the liquid flow meter 8 or the working effect of the ejector 10. By observing the readings of the pressure gauge 7, the operator can timely find the pressure abnormality in the system and take corresponding measures to adjust.

[0051] A liquid flow meter 8 is located after the pressure gauge 7, used to accurately measure the flow of the oil liquid in the second branch. It can convert the flow signal of the oil liquid into an electrical signal and feed back to the control system. In many experiments and industrial applications, the flow of the oil liquid is a key parameter. For example, when studying the heat exchange performance of the evaporator, the flow of the oil liquid needs to be accurately known in order to calculate the heat exchange amount. The liquid flow meter 8 can monitor the flow change of the oil liquid in real time, if the flow fluctuates or does not match the set value, the control system can adjust the output of the simulation evaporator 6 or other related parts of the system according to the feedback signal of the flow meter, to ensure the stability of the flow.

[0052] The second switch 9 is a key component for controlling the output of the oil in the second branch. When it is necessary to output the oil in the simulation evaporator 6 to the subsequent system or experimental device, the second switch 9 is opened, and the oil can flow out smoothly. For example, in a test experiment of a lubrication system, when the simulation evaporator 6 has generated oil meeting the experimental requirements, and the pressure gauge 7 and the liquid flow meter 8 show that the pressure and flow of the oil are stable, the second switch 9 is opened, and the oil can enter the subsequent lubrication components, such as bearings, to test the lubrication effect. The opening and closing of the second switch 9 can flexibly control the output of the oil, facilitating the debugging and operation of the experiment or system.

[0053] The ejector 10 is a device that works on the principle of fluid dynamics, which is provided with a jet end 11 and an introduction end 12. In the system, the main function of the ejector 10 is to draw out the oil in the simulation evaporator 6. When the high-pressure gas in the first branch enters the jet end 11 of the ejector 10 through the first switch 5, a high-speed jet will be generated at the jet end 11. According to Bernoulli's equation, the high-speed jet will cause a negative pressure area inside the ejector 10. This negative pressure area will suck the oil in the simulation evaporator 6 in the second branch through the introduction end 12, thereby realizing the oil drawing-out operation. For example, in some occasions where it is necessary to transport oil from a low-pressure area to a high-pressure area, the ejector 10 can effectively draw out and transport the oil to the designated position by using the power of the high-pressure gas.

[0054] The first branch is connected to the jet end 11 of the ejector 10 through the first switch 5. When the first switch 5 is opened, the high-pressure gas (gas processed by the simulation condenser 1, the pressure regulating valve 2, etc.) in the first branch will enter the jet end 11 of the ejector 10 to provide a power source for the ejector 10. The second branch is connected to the introduction end 12 of the ejector 10 through the second switch 9. When the second switch 9 is opened, the oil (oil from the simulation evaporator 6, which has been monitored by the pressure gauge 7 and the liquid flow meter 8) in the second branch can be sucked into the ejector 10 by the negative pressure area. This connection mode enables the two branches to work cooperatively under the action of the ejector 10, realizing the efficient drawing-out and transportation of the oil.

[0055] Specifically, the simulation condenser 1 transmits the high-pressure gas to the ejector 10, thereby simulating the pressure of the jet end of the ejector 10 when the machine set is actually running. The ejector 10 draws the oil in the simulation evaporator 6 into the ejector 10, so that the two channels of the first branch and the second branch are finally mixed and discharged in the ejector 10.

[0056] That is, the simulation evaporator 6 and the condenser, wherein the high-pressure gas of the condenser can be adjusted by the electronic pressure regulating valve 2 after the simulation unit is actually operated, and the ejector 10 is injected into the end pressure, and the refrigeration oil inside the evaporator is injected by the liquid flow meter 8. Through this scheme, the size of the injection flow of the ejector 10 of different types under different working conditions and pressures can be obtained, which is convenient for the design of the ejector 10 selection of different refrigeration units. Therefore, the oil return amount of each gear of the ejector 10 is determined, which guides the design selection and optimization of the ejector 10.

[0057] That is, the simulation condenser 1 transmits high-pressure gas to the jet end 11 of the ejector 10, which simulates the pressure condition of the jet end of the ejector 10 in the actual operation of the unit. By accurately adjusting the high-pressure gas output by the simulation condenser 1 through the electronic pressure regulating valve 2, the pressure of the jet end of the ejector 10 under different working conditions can be simulated. For example, in a small refrigeration unit, the pressure of the jet end of the ejector 10 may be relatively low, while in a large industrial refrigeration unit, the pressure will be higher. The electronic pressure regulating valve 2 can adjust the pressure to a specific value, such as 0.8MPa, 1.2MPa, etc., according to the experiment or design requirements, so as to provide different pressure levels of gas power source for the ejector 10, so that the ejector 10 can operate under conditions close to the actual working environment.

[0058] The ejector 10 introduces the oil liquid in the simulation evaporator 6 into the ejector 10, which is realized by using the negative pressure effect inside the ejector 10. When the high-pressure gas of the simulation condenser 1 enters the jet end 11 of the ejector 10 to generate high-speed jet flow, a negative pressure area is formed inside the ejector 10, which can suck the oil liquid in the simulation evaporator 6 through the second branch. The oil liquid in the simulation evaporator 6 is equivalent to the injected medium, and in this process, the liquid flow meter 8 accurately measures the flow of the oil liquid. The liquid flow meter 8 can monitor the flow change of the oil liquid in real time and feed back the flow data to the control system. For example, when the ejector 10 works under different pressure conditions, the liquid flow meter 8 can measure the injection flow of the oil liquid under each pressure level, such as 0.5L / min under 0.8MPa pressure, 0.8L / min under 1.2MPa pressure, etc.

[0059] The two passages of the first branch and the second branch are finally mixed inside the ejector 10 and discharged. Inside the ejector 10, the high-pressure gas is fully mixed with the oil liquid. This mixing process not only realizes the delivery of the oil liquid, but also has an impact on the characteristics of the oil liquid, such as atomization. The mixed gas-oil liquid mixture is discharged from the ejector 10, and the state of the discharged mixture can reflect the working effect of the ejector 10. For example, if the atomization effect of the mixture is good, it means that the working performance of the ejector 10 under this working condition is good, which can effectively discharge and atomize the oil liquid, and is beneficial to the subsequent lubrication or heat exchange process.

[0060] Through this scheme, the ejector flow of different models of ejector 10 under different working conditions can be obtained. This has important guiding significance for designers to select the type of ejector 10. When designing refrigeration units with different cooling capacities, appropriate ejector 10 models can be selected according to the experimental data. For example, for units with small cooling capacity, ejectors 10 that can achieve the required ejector flow at lower pressure can be selected; for units with large cooling capacity, ejectors 10 with larger ejector flow at higher pressure can be selected. At the same time, these data can also be used to optimize the design of the ejector 10. Designers can analyze the influence of the structure, size and other parameters of the ejector 10 on the performance according to the ejector flow data under different working conditions, further improve the design of the ejector 10, so that it can achieve better ejecting effect under various working conditions, and improve the operating efficiency and reliability of the entire refrigeration system. For example, by optimizing the nozzle shape, throat diameter and other parameters of the ejector 10, the ejector flow of the ejector 10 under different pressures can be improved, and the resistance loss of the oil liquid during the ejecting process can be reduced, thereby improving the overall performance of the system.

[0061] Further,

[0062] In this embodiment, the simulated condenser 1 is provided as a condenser tank. It is provided as a condenser tank so as to facilitate the function of the condenser.

[0063] In this embodiment, the simulated evaporator 6 is provided as an evaporator tank. It is provided as an evaporator tank so as to facilitate the function of the evaporator.

[0064] In this embodiment, the pressure regulating valve 2 is an electronic pressure regulating valve 2.

[0065] The electronic pressure regulating valve 2 facilitates the adjustment of the corresponding pressure.

[0066] In this embodiment, the output port of the simulated evaporator 6 is provided with a filter 13, and the simulated evaporator 6 is connected with the pressure gauge 7 through the filter 13.

[0067] The filter 13 is used to filter impurities in the analog evaporator 6, to avoid the impurities affecting the liquid flow meter 8 to cause calculation errors, and to ensure the accuracy of the data measured by the liquid flow meter 8.

[0068] That is, the filter 13 is installed at the output port of the analog evaporator 6, and its main function is to filter impurities that may exist in the analog evaporator 6. These impurities may come from the wear of materials inside the analog evaporator 6, particles generated by the oxidation of oil, or dust and other pollutants in the external environment. For example, during the long-term operation of the analog evaporator 6, the internal metal parts may generate small metal particles due to friction, and the oil may generate some gel or particulate matter after being oxidized at high temperature or after long-term use. The filter 13 can effectively intercept these impurities to prevent them from entering the subsequent system. One of the key functions of the filter 13 is to avoid impurities affecting the liquid flow meter 8. The liquid flow meter 8 is a precise measuring instrument, and its internal structure is usually delicate, such as the turbine blades in the turbine flow meter, the electrodes in the electromagnetic flow meter, etc. If impurities enter the liquid flow meter 8, they may cause damage to these components. For example, metal particles may scratch the turbine blades, affecting the normal rotation of the turbine and causing inaccurate flow measurement; particulate matter may block the electrodes of the electromagnetic flow meter, interfering with the electrochemical reaction between the electrodes and the oil, causing errors in the flow signal. The filter 13 intercepts impurities to ensure that the oil entering the liquid flow meter 8 is clean, thereby avoiding physical damage or chemical interference of impurities to the liquid flow meter 8, and ensuring that the liquid flow meter 8 can accurately measure the flow of oil.

[0069] Because the filter 13 can effectively filter impurities, the liquid flow meter 8 will not be disturbed by impurities during measurement, thereby ensuring the accuracy of the data measured by the liquid flow meter 8. Accurate flow data is crucial for the operation and analysis of the entire system. In studying the performance of the ejector 10, accurate oil flow is the basis for calculating the ejector efficiency and analyzing the ejector effect. For example, when testing the ejector flow of the ejector 10 under different working pressure conditions, if the measurement data of the liquid flow meter 8 is inaccurate, it will lead to misjudgment of the performance of the ejector 10. With the protection of the filter 13, the liquid flow meter 8 can stably and accurately output flow data, providing reliable data support for the selection and design of the ejector 10, performance optimization, etc. At the same time, accurate flow data can also help to discover abnormal situations in the system in a timely manner, such as sudden flow decrease due to blockage inside the analog evaporator 6, etc., so that the operator can take timely measures to handle it.

[0070] In this embodiment, the first switch 5 is a first electromagnetic valve.

[0071] The first switch 5 is set as a first electromagnetic valve, and the electromagnetic valve has high intelligent performance.

[0072] In this embodiment, the second switch 9 is a second electromagnetic valve.

[0073] The second switch 9 is set as a first electromagnetic valve, and the intelligent performance of the electromagnetic valve is higher.

[0074] In this embodiment, the size of the simulation condenser 1 is reduced by 1:1 to the size of the actual condenser.

[0075] The size of the simulation condenser 1 is reduced by 1:1 to the size of the actual condenser, ensuring the accuracy of the simulation.

[0076] In this embodiment, the size of the simulation evaporator 6 is reduced by 1:1 to the size of the actual evaporator.

[0077] The size of the simulation evaporator 6 is reduced by 1:1 to the size of the actual condenser, ensuring the accuracy of the simulation.

[0078] In this embodiment, the oil in the simulation evaporator 6 is led out to the compressor 14 by the ejector 10.

[0079] The oil mixed into the evaporator is returned to the compressor 14.

[0080] The working principle is as follows:

[0081] The simulation condenser 1 tank, the electronic pressure regulating valve 2, the pressure sensor 3, the gas flow meter 4, and the first electromagnetic valve form a gas channel, which is an ejector channel, used for simulating the high-pressure gas channel of the condenser at the end of the jet pipe of the ejector 10.

[0082] The second electromagnetic valve, the liquid flow meter 8, the pressure gauge 7, the filter 13, and the simulation evaporator 6 form a liquid channel, which is a channel to be ejected, used for simulating the oil mixing channel of the evaporator at the end of the introduction pipe of the ejector 10. The two channels are finally mixed in the ejector 10, discharged through the compressor 14 tank, and adjusted in pressure through the electronic pressure regulating valve 2 to be consistent with the actual operating condition of the ejector 10. Finally, the actual oil return amount of the ejector 10 is measured through the liquid flow meter 8.

[0083] The filter 13 is used to filter the impurities in the evaporator tank, ensuring the accuracy of the data measured by the liquid flow meter 8.

[0084] Embodiment 2

[0085] To further illustrate the working method of the ejector 10 oil return capacity measuring system of the utility model,

[0086] The embodiment discloses a use method of an ejector 10 oil return capacity measuring system.

[0087] A first branch, the first branch comprising an analog condenser 1, a pressure regulating valve 2, a pressure sensor 3, a gas flow meter 4, a first switch 5 connected in sequence along a gas output direction, the analog condenser 1 outputs gas;

[0088] Specifically, the first branch is used to output high-pressure gas in the condenser, wherein the condenser is an analog condenser 1 simulating a real condenser, the analog condenser 1 adjusts the high-pressure gas in it to a working condition to be simulated through the pressure regulating valve 2, the pressure sensor 3 detects the degree of the high-pressure gas output by the analog condenser 1, and opening the first switch 5 can make the high-pressure gas of the set working condition output,

[0089] A second branch, the second branch comprising an analog evaporator 6, a pressure gauge 7, a liquid flow meter 8, a second switch 9 connected in sequence along an oil liquid output direction,

[0090] Specifically, the second branch is used to output oil liquid in the evaporator, wherein the evaporator is an analog evaporator 6 simulating a real evaporator,

[0091] An ejector 10, the ejector 10 being provided with a jet flow end 11 and an introduction end 12, the first branch being connected with the jet flow end 11 through the first switch 5, the second branch being connected with the introduction end 12 through the second switch 9, and the oil liquid in the analog evaporator 6 being introduced into the ejector 10 by the ejector 10.

[0092] Specifically, the analog condenser 1 transmits the high-pressure gas to the ejector 10, thereby simulating the pressure of the jet flow end of the ejector 10 in actual operation of the unit, and the ejector 10 introduces the oil liquid in the analog evaporator 6 into the ejector 10, so that the two channels of the first branch and the second branch are finally mixed in the ejector 10 and discharged.

[0093] That is, the analog evaporator 6 and the condenser, wherein the high-pressure gas of the condenser can be adjusted through the electronic pressure regulating valve 2 to simulate the pressure of the jet flow end of the ejector 10 in actual operation of the unit, and the refrigerated oil in the evaporator introduced by the ejector can be measured through the liquid flow meter 8; through this scheme, the size of the ejector 10 jet flow under different working condition pressures and different models can be obtained, which facilitates the design of the selection of the ejector 10 for different refrigeration units. Therefore, the oil return amount of each gear of the ejector 10 is determined, which guides the selection design and synchronously optimizes the ejector 10.

[0094] Further,

[0095] In the embodiment, the analog condenser 1 is arranged as a condenser tank body, thereby facilitating the realization of the function of the condenser.

[0096] In this embodiment, the simulation evaporator 6 is arranged as an evaporator tank. It is arranged as an evaporator tank so as to facilitate the function of the evaporator.

[0097] In this embodiment, the pressure regulating valve 2 is an electronic pressure regulating valve 2.

[0098] The electronic pressure regulating valve 2 facilitates the adjustment of the corresponding pressure.

[0099] In this embodiment, the output port of the simulation evaporator 6 is provided with a filter 13, and the simulation evaporator 6 is connected with the pressure gauge 7 through the filter 13.

[0100] The filter 13 is used to filter the impurities in the simulation evaporator 6, so as to avoid the impurities affecting the calculation error of the liquid flow meter 8 and ensure the accuracy of the data measured by the liquid flow meter 8.

[0101] In this embodiment, the first switch 5 is a first electromagnetic valve.

[0102] The first switch 5 is arranged as a first electromagnetic valve, and the intelligent performance of the electromagnetic valve is high.

[0103] In this embodiment, the second switch 9 is a second electromagnetic valve.

[0104] The second switch 9 is arranged as a first electromagnetic valve, and the intelligent performance of the electromagnetic valve is high.

[0105] In this embodiment, the size of the simulation condenser 1 is reduced by 1:1 to the size of the actual condenser.

[0106] The size of the simulation condenser 1 is reduced by 1:1 to the size of the actual condenser, which ensures the accuracy of the simulation.

[0107] In this embodiment, the size of the simulation evaporator 6 is reduced by 1:1 to the size of the actual evaporator.

[0108] The size of the simulation evaporator 6 is reduced by 1:1 to the size of the actual condenser, which ensures the accuracy of the simulation.

[0109] In this embodiment, the oil in the simulation evaporator 6 is drawn out to the compressor 14 by the ejector 10.

[0110] The oil mixed into the evaporator is returned to the compressor 14.

[0111] When starting to operate, the electronic pressure regulating valve 2, the first electromagnetic valve and the second electromagnetic valve are opened in sequence, the set value of the electronic pressure regulating valve 2 is set, the entire system forms an ejector system, after the pressure is stabilized to the set value, the data of the gas flow meter 4 and the liquid flow meter 8 are read, and the actual oil return amount of the ejector 10 under the working condition is measured. According to the actual oil return amount, the specification of the ejector 10 is adjusted.

[0112] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples herein are not intended to limit the scope of the present application unless otherwise specifically stated. Also, it is to be understood that the drawings are not necessarily drawn to scale of the actual proportions of the parts being depicted. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because such techniques, methods, and apparatus are considered to be part of the field, but are nevertheless well within the scope of the application. In all examples shown and discussed herein, any specific values are to be interpreted as illustrative only and not as limiting. Thus, other examples of the illustrative embodiments can have different values. It is to be noted that like numbers and letters refer to like elements throughout the several views of the drawings and that the exemplified embodiments can not reflect the specific numbers of the claims herein.

[0113] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal", and "top, bottom" and the like are generally based on the orientation or positional relationships shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of the parts themselves.

[0114] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices as described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0115] In addition, it should be noted that the use of the words "first", "second", and the like to describe various components is merely intended to distinguish the corresponding components, and the words do not have special meanings unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0116] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A system for measuring the oil return capacity of an ejector, characterized in that, include: The first branch includes a simulated condenser, a pressure regulating valve, a pressure sensor, a gas flow meter, and a first switch connected in sequence. The simulated condenser outputs gas and transmits it along the direction of the first switch. The second branch includes a simulated evaporator, a pressure gauge, a liquid flow meter, and a second switch connected in sequence. An ejector is provided, which has a jet end and an inlet end. The first branch is connected to the jet end through the first switch, and the second branch is connected to the inlet end through the second switch. The oil in the simulated evaporator is drawn out by the ejector along the direction of the second switch.

2. The ejector oil return capacity measuring system according to claim 1, characterized in that, The simulated condenser is configured as a condenser tank.

3. The ejector oil return capacity measuring system according to claim 1, characterized in that, The simulated evaporator is configured as an evaporator tank.

4. The ejector oil return capacity measuring system according to claim 1, characterized in that, The pressure regulating valve is an electronic pressure regulating valve.

5. The ejector oil return capacity measuring system according to claim 1, characterized in that, The output port of the simulated evaporator is equipped with a filter, and the simulated evaporator is connected to the pressure gauge via the filter.

6. The ejector oil return capacity measuring system according to claim 1, characterized in that, The first switch is a first solenoid valve.

7. The ejector oil return capacity measuring system according to claim 1, characterized in that, The second switch is a second solenoid valve.

8. The ejector oil return capacity measuring system according to claim 1, characterized in that, The dimensions of the simulated condenser are replicated from the actual condenser at a 1:1 scale.

9. The ejector oil return capacity measuring system according to claim 1, characterized in that, The dimensions of the simulated evaporator are replicated from the actual evaporator at a 1:1 scale.

10. The ejector oil return capacity measuring system according to claim 1, characterized in that, The oil in the simulated evaporator is drawn out to the compressor by the ejector.

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