Liquid impact experimental device for high-pressure cavity scroll compressor

Abstract

The utility model relates to a compressor experimental test technical field especially relates to a high pressure cavity scroll compressor liquid impact experimental device. The utility model discloses: by pipeline connection of condenser, liquid storage tank, electronic expansion valve, evaporator in proper order, the inlet of condenser is connected with the outlet of evaporator respectively with the exhaust line of the compressor of being tested and the suction line, forms the loop, still be connected with the liquid return tank on the pipeline between evaporator and the compressor of being tested, and the liquid return tank is also connected with the liquid storage tank. The utility model provides the judgment basis for verifying the reliability of high pressure cavity compressor anti liquid knock, compared with other experimental devices, the invention good reliability, experimental cycle is short, and the experimental effectiveness is high, and the stability is good, and can simulate different liquid return type situation, can be used as the standard experimental device of compressor spare part design allowance.

Description

Technical Field

[0001] This utility model relates to the field of compressor experimental testing technology, and in particular to a liquid impact experimental device for a high-pressure chamber scroll compressor. Background Technology

[0002] With the improvement of energy efficiency ratings and the demand for energy saving, the requirements for variable frequency scroll compressors are becoming more and more common in the air conditioning market. A part of the structure of a variable frequency scroll compressor is a high-pressure chamber. High-pressure chamber compressors are significantly different from low-pressure chamber compressors. In low-pressure chambers, air intake enters the entire compressor cavity before entering the scroll plate for compression, while in high-pressure chambers, air intake directly enters the scroll plate for compression, and then exhaust fills the entire compressor cavity. Due to this difference, some test methods applicable to low-pressure chamber compressors are often not applicable to high-pressure chamber compressors. Therefore, it is necessary for high-pressure chamber compressors to have their own test methods.

[0003] Like low-pressure compressors, high-pressure compressors also face the risk of liquid return during actual use. Because liquids are incompressible, liquid return during operation poses a significant challenge to the reliability of compressor components. Slight liquid return may lead to increased load and wear, while significant return can damage the compressor, such as causing the scroll plate to break, the cross ring to fracture, or bearing wear. Therefore, ideally, the compressor should operate with a pure gaseous state throughout the entire intake process. However, in reality, compressor compression of liquids is often unavoidable. Occasional short periods of liquid compression or continuous operation with small amounts of liquid are possible, especially during initial unit startup, low ambient temperature operation, and defrosting operation. Therefore, the compressor design must account for this situation, and the design margins of components related to liquid return, such as the scroll plate and cross ring, must be guaranteed.

[0004] Therefore, the increased margin in the design needs to be verified experimentally. However, the unique characteristics of high-pressure compressors mean their verification approach differs somewhat from that of low-pressure compressors. Low-pressure compressors are designed with liquid refrigerant filled within the compressor cavity, which is then carried into the scroll plate by the suction gas. High-pressure compressors, on the other hand, store the liquid refrigerant in a sealed container connected to the compressor inlet. Currently, there are no fixed experimental and evaluation standards for the liquid slugging resistance of high-pressure compressors. Often, it is assessed by simulating liquid return conditions in a water-cooled compressor life test device. This method is time-consuming, and relying solely on controlling suction superheat to determine liquid return has significant limitations, making it difficult to definitively determine whether liquid compression has occurred. Therefore, it is essential to invent a more intuitive and verifiable liquid return test device to verify the reliability of the compressor's design margin.

[0005] In view of the problems existing in the above-mentioned prior art, it is necessary to study and design a new type of high-pressure chamber scroll compressor liquid impact experimental device to overcome the problems existing in the prior art. Summary of the Invention

[0006] To address the technical problems identified in the prior art, this invention provides a liquid impact testing device for high-pressure chamber scroll compressors. This invention can perform liquid impact tests on high-pressure chamber compressors and can quickly and accurately evaluate whether the compressor's resistance to liquid impact is significantly improved, thus providing reliable testing value for the design of high-pressure chamber compressors.

[0007] The technical means adopted in this utility model are as follows: A high-pressure chamber scroll compressor liquid shock experimental device includes: a condenser, a liquid storage tank, an electronic expansion valve, and an evaporator connected in sequence by pipelines; Furthermore, the inlet of the condenser and the outlet of the evaporator are respectively connected to the exhaust pipe and suction pipe of the compressor under test to form a loop; Furthermore, a return liquid tank is connected to the pipeline between the evaporator and the compressor under test, and the return liquid tank is also connected to the liquid storage tank.

[0008] Furthermore, the condenser is a shell-and-tube heat exchanger, and an exhaust temperature sensor and a high-pressure sensor are installed on the pipeline between its inlet and the exhaust pipeline of the compressor under test.

[0009] Furthermore, the liquid storage tank includes three ports: the upper inlet is connected to the outlet of the condenser via a pipeline, the outlet is connected to the inlet of the electronic expansion valve via a pipeline, and the lower port is connected to the return pipe.

[0010] Furthermore, the evaporator is a shell-and-tube heat exchanger, and a first solenoid valve, a suction temperature sensor, and a low-pressure sensor are sequentially installed on the pipeline between its outlet and the suction pipeline of the compressor under test.

[0011] Furthermore, the return tank is equipped with four interfaces: one at the top and three at the bottom. Furthermore, the interface at the top of the return tank is connected to the suction line of the compressor under test via a second branch, which is connected to the pipeline between the first solenoid valve and the suction temperature sensor. Furthermore, of the three interfaces at the bottom of the return tank, one interface is connected to the suction pipe of the compressor under test through the third branch, and is connected to the pipe between the first solenoid valve and the suction temperature sensor; one pipe is connected to the pipe opening at the bottom of the storage tank through the first branch; and another pipe is directly connected to the atmosphere through the fourth branch.

[0012] Furthermore, a first shut-off valve, a second shut-off valve, a second solenoid valve, and a third shut-off valve are respectively installed on the first branch, the second branch, the third branch, and the fourth branch.

[0013] Furthermore, the return tank is equipped with two circular sight glasses.

[0014] Compared with the prior art, the present invention has the following advantages: The liquid impact test device for high-pressure chamber scroll compressors provided by this utility model provides a basis for judging the reliability of high-pressure chamber compressors against liquid impact. Compared with other test devices, this invention has good reliability, short test cycle, high test effectiveness, good stability, and can simulate different types of liquid return. It can be used as a standard test device for the design margin of compressor components. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] In the diagram: 10. Compressor under test; 11. Discharge temperature sensor; 12. High pressure sensor; 20. Condenser; 30. Liquid receiver; 40. Electronic expansion valve; 50. Evaporator; 51. First solenoid valve; 52. Suction temperature sensor; 53. Low pressure sensor; 60. Liquid return tank; 61. First shut-off valve; 611. First branch; 62. Second shut-off valve; 621. Second branch; 63. Second solenoid valve; 631. Third branch; 64. Third shut-off valve; 641. Fourth branch. Detailed Implementation

[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0022] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0023] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0025] like Figure 1 As shown, this utility model provides a liquid impact test device for a high-pressure chamber scroll compressor, comprising: a condenser 20, a liquid storage tank 30, an electronic expansion valve 40, and an evaporator 50 connected in sequence by pipelines; the inlet of the condenser 20 and the outlet of the evaporator 50 are respectively connected to the exhaust pipeline and the suction pipeline of the compressor under test 10, forming a loop; a return liquid tank 60 is also connected to the pipeline between the evaporator 50 and the compressor under test 10, and the return liquid tank 60 is also connected to the liquid storage tank 30.

[0026] The condenser 20 is a shell-and-tube heat exchanger, and an exhaust temperature sensor 11 and a high pressure sensor 12 are installed on the pipeline between its inlet and the exhaust pipeline of the compressor 10 under test.

[0027] The liquid storage tank 30 includes three ports: the upper inlet is connected to the outlet of the condenser 20 via a pipeline, the outlet is connected to the inlet of the electronic expansion valve 40 via a pipeline, and the lower port is connected to the return pipe 60.

[0028] The evaporator 50 is a shell-and-tube heat exchanger. A first solenoid valve 51, a suction temperature sensor 52, and a low-pressure sensor 53 are sequentially installed on the pipeline between its outlet and the suction pipeline of the compressor 10 under test.

[0029] The return liquid tank 60 has four interfaces: one at the top and three at the bottom. The interface at the top of the return liquid tank 60 is connected to the suction pipe of the compressor 10 under test via the second branch 621, which is connected to the pipe between the first solenoid valve 51 and the suction temperature sensor 52. Of the three interfaces at the bottom of the return liquid tank 60, one interface is connected to the suction pipe of the compressor 10 under test via the third branch 631, which is connected to the pipe between the first solenoid valve 51 and the suction temperature sensor 52; one pipe is connected to the pipe opening at the bottom of the storage tank 30 via the first branch 611; and the other pipe is directly connected to the atmosphere via the fourth branch 641.

[0030] A first shut-off valve 61, a second shut-off valve 62, a second solenoid valve 63, and a third shut-off valve 64 are respectively installed on the first branch 611, the second branch 621, the third branch 631, and the fourth branch 641.

[0031] Two circular sight glasses are installed on the return tank 60.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-pressure chamber scroll compressor liquid impact experimental apparatus, characterized in that: The high-pressure chamber scroll compressor liquid impact experimental device includes: a condenser (20), a liquid storage tank (30), an electronic expansion valve (40), and an evaporator (50) connected in sequence by pipelines. The inlet of the condenser (20) and the outlet of the evaporator (50) are respectively connected to the exhaust pipe and suction pipe of the compressor (10) under test to form a loop; A return liquid tank (60) is also connected to the pipeline between the evaporator (50) and the compressor (10) under test, and the return liquid tank (60) is also connected to the storage tank (30).

2. The experimental apparatus for liquid impact of a high-pressure chamber scroll compressor according to claim 1, characterized in that: The condenser (20) is a shell-and-tube heat exchanger, and an exhaust temperature sensor (11) and a high pressure sensor (12) are installed on the pipeline between its inlet and the exhaust pipeline of the compressor (10) under test.

3. The experimental apparatus for liquid impact of a high-pressure chamber scroll compressor according to claim 1, characterized in that: The liquid storage tank (30) includes three ports: the upper inlet is connected to the outlet of the condenser (20) through a pipeline, the outlet is connected to the inlet of the electronic expansion valve (40) through a pipeline, and the lower port is connected to the return tank (60).

4. The experimental apparatus for liquid impact of a high-pressure chamber scroll compressor according to claim 1, characterized in that: The evaporator (50) is a shell-and-tube heat exchanger, and a first solenoid valve (51), a suction temperature sensor (52) and a low-pressure sensor (53) are sequentially installed on the pipeline between its outlet and the suction pipeline of the compressor (10) under test.

5. The experimental apparatus for liquid impact of a high-pressure chamber scroll compressor according to claim 1, characterized in that: The return tank (60) is provided with four interfaces, one interface at the top and three branch interfaces at the bottom; The interface at the top of the return tank (60) is connected to the suction pipe of the compressor (10) under test through the second branch (621). The second branch (621) is connected to the pipe between the first solenoid valve (51) and the suction temperature sensor (52). Of the three interfaces at the bottom of the return tank (60), one interface is connected to the suction pipe of the compressor (10) under test through the third branch (631), and is connected to the pipe between the first solenoid valve (51) and the suction temperature sensor (52). One pipe is connected to the pipe opening at the bottom of the storage tank (30) through the first branch (611). Another pipe is directly connected to the atmosphere through the fourth branch (641).

6. The experimental apparatus for liquid impact of a high-pressure chamber scroll compressor according to claim 5, characterized in that: The first branch (611), the second branch (621), the third branch (631) and the fourth branch (641) are respectively equipped with a first shut-off valve (61), a second shut-off valve (62), a second solenoid valve (63) and a third shut-off valve (64).

7. The experimental apparatus for liquid impact of a high-pressure chamber scroll compressor according to claim 1, characterized in that: The return tank (60) is equipped with two circular sight glasses.

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