Compressor performance test system

Abstract

The utility model discloses a compressor performance test system, which is characterized in that an air inlet of an exhaust pipeline stop valve is connected with a refrigerant outlet of a tested compressor, and an air outlet is connected with an inlet of a gas flow meter; an outlet of the gas flowmeter is connected with a gas inlet of the exhaust pressure regulating valve The exhaust pressure regulating valve air outlet is connected with the suction pressure regulating valve air inlet and the condenser first air inlet; the condenser is provided with an internal circulation electric heating assembly, a first air outlet is connected with an air inlet of the air suction pressure regulating valve, and a first liquid outlet is connected with a liquid inlet in the side wall of the lower portion of the liquid storage device. The liquid storage device is connected with the condenser in parallel, a first gas outlet is connected with a first gas inlet of the condenser, a second gas outlet is connected with a gas inlet of the gas cooler through the suction temperature regulating valve, and the liquid level is the same as that of the condenser; the suction pressure regulating valve gas outlet is connected with the gas cooler gas inlet; a gas outlet of the gas cooler is connected with a refrigerant inlet of the tested compressor through a compressor suction pipeline stop valve.

Description

Technical Field

[0001] This utility model relates to the field of environmental testing, and in particular to a compressor performance testing system. Background Technology

[0002] In existing compressor systems, heat exchangers are required as the system's condenser. To save space and improve heat exchange efficiency, plate heat exchangers are used, often in conjunction with a liquid receiver. The heat exchanger and receiver are arranged in series, with the plate heat exchanger having an inlet at the top and an outlet at the bottom, leading to the liquid receiver. The liquid receiver is positioned slightly below the plate heat exchanger. During testing, the upper part of the liquid receiver contains gas, while the lower part contains liquid, thus achieving gas-liquid separation and liquid storage. The liquid flowing out of the liquid receiver continues into the expansion valve, completing the entire refrigeration cycle.

[0003] In systems using plate heat exchangers as condensers, current technology simply connects the liquid receiver and the plate heat exchanger in series, which has two drawbacks:

[0004] First, this method is not conducive to rapid pressure increase. Compressor systems undergo dynamic testing under multiple operating conditions, requiring rapid pressure rise. However, when using high-temperature water to heat the condenser and increase pressure, only gaseous refrigerant is present in the heat exchanger, not liquid. This method of simply heating the gaseous refrigerant results in a slow pressure increase in the compressor system. A much faster method would be to directly heat a portion of the liquid refrigerant to capture the pressure change as it expands into a gaseous state.

[0005] Second, if the liquid at the receiver outlet does not have sufficient subcooling, even if the plate heat exchanger area is selected to be too large, liquid cannot be stored below the plate heat exchanger. After the refrigerant enters the receiver, the upper part of the tank is in a gaseous state and the lower part is in a liquid state, and the receiver still maintains a saturated state. If no other subcooling equipment is added to the receiver outlet, if the pressure drop in the liquid pipeline is too large, the refrigerant before the expansion valve in the liquid circuit will enter the two-phase region, generating bubbles and causing system fluctuations.

[0006] To overcome the shortcomings of existing technologies, a common solution is to add a subcooler after the receiver, such as a plate heat exchanger. One side of the plate heat exchanger receives the refrigerant flowing from the receiver outlet, while the other side receives low-temperature water for cooling, achieving a subcooling of approximately 5–10°C. Existing technologies do not employ measures to rapidly increase the pressure before the liquid circuit valves, while rapid pressure increases are crucial for dynamically changing compressor systems. Utility Model Content

[0007] The utility model description section introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0008] The technical problem to be solved by this utility model is to provide a compressor performance testing system that can achieve rapid pressure increase and provide the cooling degree of the liquid receiver outlet.

[0009] To solve the above-mentioned technical problems, the compressor performance testing system provided by this utility model includes:

[0010] The exhaust pipe shut-off valve 3 has its inlet connected to the refrigerant outlet of the compressor 1 under test, and its outlet connected to the inlet of the gas flow meter 4.

[0011] Gas flow meter 4, whose outlet is connected to the inlet of exhaust pressure regulating valve 5;

[0012] The exhaust pressure regulating valve 5 has its outlet connected to the inlet of the intake pressure regulating valve 14 and the first inlet of the condenser 6.

[0013] The condenser 6 has an internal circulation electric heating component, its first air outlet is connected to the air inlet of the suction pressure regulating valve 14, and its first liquid outlet is connected to the liquid inlet of the lower side wall of the liquid reservoir 7.

[0014] The liquid storage tank 7 is connected in parallel with the condenser 6. Its first outlet is connected to the first inlet of the condenser 6, and its second outlet is connected to the inlet of the gas cooler 15 via the suction temperature regulating valve 13. Its liquid level is the same as that of the condenser 6.

[0015] The intake pressure regulating valve 14 has its outlet connected to the inlet of the gas cooler 15.

[0016] The gas cooler 15 has its outlet connected to the refrigerant inlet of the compressor 1 under test via the compressor suction line shut-off valve 17.

[0017] Preferably, the compressor performance testing system is further improved by including:

[0018] The first temperature and pressure measuring point 2 is located at the refrigerant outlet of the compressor.

[0019] The second temperature and pressure measuring point 18 is located at the refrigerant inlet of the compressor.

[0020] Preferably, the compressor performance testing system is further improved by including:

[0021] A one-way valve 9 is arranged between the first outlet of the liquid reservoir 7 and the first inlet of the condenser 6.

[0022] Preferably, the compressor performance testing system is further improved by including:

[0023] A static mixer 16 is arranged between the outlet of the gas cooler 15 and the compressor suction line shut-off valve 17.

[0024] Preferably, in a further improvement to the compressor performance testing system, the internal circulation electric heating component includes:

[0025] The water circuit electric regulating valve 12 is connected to the second liquid outlet of the condenser 6;

[0026] The constant flow internal circulation water pump 11 of the condenser has its inlet connected to the second liquid outlet of the condenser 6 and its outlet connected to the inlet of the electric heater 10 of the condenser water circuit.

[0027] The condenser water circuit electric heater 10 has its outlet connected to the liquid inlet of the condenser 6.

[0028] Preferably, in a further improvement to the compressor performance testing system, the liquid receiver 7 has a low liquid level alarm switch 8.

[0029] Preferably, in a further improvement to the compressor performance testing system, the condenser 6 is a plate heat exchanger.

[0030] Preferably, the compressor performance testing system is further improved by having an internal heat exchange coil in the lower half of the liquid receiver 7.

[0031] This invention designs the condenser and the liquid receiver in parallel, which solves the two problems of slow pressure rise and lack of subcooling at the outlet of the liquid receiver caused by the traditional series connection of heat exchanger and liquid receiver.

[0032] This utility model adopts the gas cooler method specified in the national standard. Part of the gaseous refrigerant in the exhaust pipe will enter the gas cooler in gaseous form, and the other part will enter the gas cooler in liquid form after passing through the condenser. A plate heat exchanger is used as the condenser. The condenser and the liquid receiver are designed in parallel. The water circuit of the condenser adopts a constant flow system and uses an internal circulating water pump. The condensed liquid refrigerant and the other part of the uncondensed gaseous refrigerant are mixed to replace the function of the evaporator and finally return to the compressor suction port.

[0033] In operation, the high-temperature water heated by the internal circulation electric heating component directly acts on the refrigerant liquid at the bottom of the condenser. According to the principle of communicating vessels, the condenser and the receiver have the same liquid level at the bottom, causing the refrigerant to expand due to heat, thus increasing the refrigerant pressure inside the condenser, i.e., the pressure before the expansion valve in the liquid circuit. Heating the liquid to increase its pressure is far more effective than directly heating the gas; the hot water causes the liquid to rapidly expand and turn into a gas, resulting in a greater volume change. Simultaneously, once the pressure stabilizes, the lower-temperature water exchanges heat with the condenser. This heat exchange effect directly acts on the liquid refrigerant at the bottom of the condenser, producing a subcooling effect and ensuring the subcooling requirement before the expansion valve in the liquid circuit. Attached Figure Description

[0034] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the present invention, supplementing the description in the specification. However, these drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by the exemplary embodiments of the present invention. The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0035] Figure 1 This is a schematic diagram of the structure of the first embodiment of this utility model.

[0036] Figure 2 This is a schematic diagram of the structure of the second embodiment of this utility model.

[0037] Explanation of reference numerals in the attached figures

[0038] Compressor 1 under test

[0039] First temperature and pressure measuring point 2

[0040] Exhaust pipe shut-off valve 3

[0041] Gas flow meter 4

[0042] Exhaust pressure regulating valve 5

[0043] Condenser 6

[0044] Liquid reservoir 7

[0045] Low liquid level alarm switch 8

[0046] One-way valve 9

[0047] Condenser water circuit electric heater 10

[0048] 11 condenser constant flow internal circulating water pump

[0049] Water circuit electric regulating valve 12

[0050] Intake pressure regulating valve 14

[0051] Gas cooler 15

[0052] Static Mixer 16

[0053] Compressor suction line shut-off valve 17

[0054] Second temperature and pressure measuring point 18. Detailed Implementation

[0055] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can fully understand other advantages and technical effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through different specific embodiments, and various details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of this utility model can be implemented in many different forms and should not be construed as limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of this utility model thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements.

[0056] First embodiment;

[0057] refer to Figure 1 As shown, this utility model provides a compressor performance testing system, comprising:

[0058] The exhaust pipe shut-off valve 3 has its inlet connected to the refrigerant outlet of the compressor 1 under test, and its outlet connected to the inlet of the gas flow meter 4.

[0059] Gas flow meter 4, whose outlet is connected to the inlet of exhaust pressure regulating valve 5;

[0060] The exhaust pressure regulating valve 5 has its outlet connected to the inlet of the intake pressure regulating valve 14 and the first inlet of the condenser 6.

[0061] The condenser 6 has an internal circulation electric heating component, its first air outlet is connected to the air inlet of the suction pressure regulating valve 14, and its first liquid outlet is connected to the liquid inlet of the lower side wall of the liquid reservoir 7.

[0062] The liquid storage tank 7 is connected in parallel with the condenser 6. Its first outlet is connected to the first inlet of the condenser 6, and its second outlet is connected to the inlet of the gas cooler 15 via the suction temperature regulating valve 13. Its liquid level is the same as that of the condenser 6.

[0063] The gas pressure regulating valve 14 has its outlet connected to the inlet of the gas cooler 15.

[0064] The gas cooler 15 has its outlet connected to the refrigerant inlet of the compressor 1 under test via the compressor suction line shut-off valve 17.

[0065] Furthermore, it should be understood that although the terms "first," "second," etc., may be used herein to describe different elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, or portion from another element, component, region, layer, or portion. Therefore, without departing from the teachings of exemplary embodiments according to this utility model, the first element, component, region, layer, or portion discussed below may also be referred to as the second element, component, region, layer, or portion.

[0066] Second embodiment;

[0067] refer to Figure 2 As shown, this utility model provides a compressor performance testing system, comprising:

[0068] The exhaust pipe shut-off valve 3 has its inlet connected to the refrigerant outlet of the compressor 1 under test, and its outlet connected to the inlet of the gas flow meter 4.

[0069] Gas flow meter 4, whose outlet is connected to the inlet of exhaust pressure regulating valve 5;

[0070] The exhaust pressure regulating valve 5 has its outlet connected to the inlet of the intake pressure regulating valve 14 and the first inlet of the condenser 6.

[0071] The condenser 6 has an internal circulation electric heating component, its first air outlet is connected to the air inlet of the suction pressure regulating valve 14, and its first liquid outlet is connected to the liquid inlet of the lower side wall of the liquid reservoir 7.

[0072] The liquid storage tank 7 is connected in parallel with the condenser 6. Its first outlet is connected to the first inlet of the condenser 6, and its second outlet is connected to the inlet of the gas cooler 15 via the suction temperature regulating valve 13. Its liquid level is the same as that of the condenser 6.

[0073] One-way valve 9 is arranged between the first outlet of liquid reservoir 7 and the first inlet of condenser 6.

[0074] The gas pressure regulating valve 14 has its outlet connected to the inlet of the gas cooler 15.

[0075] Gas cooler 15, whose outlet is connected to the refrigerant inlet of the compressor 1 under test via compressor suction line shut-off valve 17;

[0076] A static mixer 16 is arranged between the gas outlet of the gas cooler 15 and the compressor suction line shut-off valve 17; wherein, the first temperature and pressure measuring point 2 is arranged at the compressor refrigerant outlet.

[0077] The second temperature and pressure measuring point 18 is located at the refrigerant inlet of the compressor.

[0078] For example, the internal circulation electric heating assembly in the second embodiment described above includes:

[0079] The water circuit electric regulating valve 12 is connected to the second liquid outlet of the condenser 6;

[0080] The constant flow internal circulation water pump 11 of the condenser has its inlet connected to the second liquid outlet of the condenser 6 and its outlet connected to the inlet of the electric heater 10 of the condenser water circuit.

[0081] The condenser water circuit electric heater 10 has its outlet connected to the liquid inlet of the condenser 6;

[0082] The liquid receiver 7 has a low liquid level alarm switch 8, and the condenser 6 is a plate heat exchanger.

[0083] Alternatively, in the second embodiment, the lower half of the reservoir 7 has an internal heat exchange coil.

[0084] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless explicitly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0085] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A compressor performance testing system, characterized in that, include: The exhaust pipe shut-off valve (3) has its inlet connected to the refrigerant outlet of the compressor (1) under test, and its outlet connected to the inlet of the gas flow meter (4). Gas flow meter (4), whose outlet is connected to the inlet of exhaust pressure regulating valve (5); The exhaust pressure regulating valve (5) has its outlet connected to the intake port of the intake pressure regulating valve (14) and the first intake port of the condenser (6); The condenser (6) has an internal circulation electric heating component, its first outlet is connected to the inlet of the suction pressure regulating valve (14), and its first liquid outlet is connected to the liquid inlet of the lower side wall of the liquid reservoir (7). The liquid reservoir (7) is connected in parallel with the condenser (6). Its first outlet is connected to the first inlet of the condenser (6), and its second outlet is connected to the inlet of the gas cooler (15) via the intake temperature regulating valve (13). Its liquid level is the same as that of the condenser (6). The intake pressure regulating valve (14) has its outlet connected to the inlet of the gas cooler (15); The gas cooler (15) has its outlet connected to the refrigerant inlet of the compressor (1) under test via the compressor suction line shut-off valve (17).

2. The compressor performance testing system as described in claim 1, characterized in that, Also includes: The first temperature and pressure measuring point (2) is located at the refrigerant outlet of the compressor. The second temperature and pressure measuring point (18) is located at the refrigerant inlet of the compressor.

3. The compressor performance testing system as described in claim 1, characterized in that, Also includes: A one-way valve (9) is arranged between the first outlet of the liquid reservoir (7) and the first inlet of the condenser (6).

4. The compressor performance testing system as described in claim 1, characterized in that, Also includes: A static mixer (16) is arranged between the outlet of the gas cooler (15) and the compressor suction line shut-off valve (17).

5. The compressor performance testing system as described in claim 1, characterized in that, The internal circulation electric heating assembly includes: The water circuit electric regulating valve (12) is connected to the second liquid outlet of the condenser (6); The constant flow internal circulation water pump (11) of the condenser has its inlet connected to the second liquid outlet of the condenser (6) and its outlet connected to the inlet of the electric heater (10) of the condenser water circuit. The condenser water circuit electric heater (10) has its outlet connected to the liquid inlet of the condenser (6).

6. The compressor performance testing system as described in claim 1, characterized in that: The reservoir (7) has a low level alarm switch (8).

7. The compressor performance testing system as described in claim 1, characterized in that: The condenser (6) is a plate heat exchanger.

8. The compressor performance testing system as described in claim 1, characterized in that: The lower half of the reservoir (7) has an internal heat exchange coil.

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