A separator for high-pressure section of CO2 refrigerating unit

Abstract

The utility model relates to a separator for CO2 refrigerating unit high pressure section, including separator cylinder, the outer wall of separator cylinder is provided with refrigerant import, the position of separator cylinder in correspondence with refrigerant import is provided with the impact board, the upper layer of impact board is the deflector, the top of separator cylinder sets up the gas refrigerant export, the lower part of separator cylinder impact board sets up the lower layer deflector, the lower layer deflector below sets up the liquid refrigerant export, the utility model discloses the separator that increases before the ejector, and the refrigerant enters into the separator through refrigerant import, directly flows to the impact board, and the liquid falls naturally, and enters into the pressure regulating valve through the liquid refrigerant export. The gas refrigerant is guided through the lower layer deflector, and enters into the ejector through the gas refrigerant export. The utility model separates the gas and liquid in the refrigerant from the air cooler, so that all the gas refrigerant enters into the ejector, and the efficiency of the ejector is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of separator technology, and more particularly to a separator for the high-pressure section of a CO2 refrigeration unit. Background Technology

[0002] Freon, a synthetic refrigerant, is widely used in home appliances and industrial processes, but its release into the atmosphere damages the ozone layer. Globally, there is a search for green and environmentally friendly refrigerants. In the long term, CO2 refrigerant aligns with the development trend of green and environmentally friendly natural refrigerants. Energy efficiency is an unavoidable issue when using CO2 refrigeration systems. Through several generations of technological updates, the use of ejectors has further improved the energy efficiency of CO2 refrigeration units. In CO2 refrigeration systems, the fluid cooled by the gas cooler is typically a gas-liquid two-phase mixture. If it directly enters the ejector, the gas-liquid two-phase fluid will affect the ejector's efficiency and may even cause it to fail. A key characteristic of ejectors is that the high-pressure inlet requires high-pressure gas; if liquid is mixed in, it will affect the ejection effect. Currently, products in the industry do not have a separation device before the ejector. Therefore, a separator needs to be designed before the ejector inlet to separate the gas and liquid. Utility Model Content

[0003] To address the aforementioned technical problems, a separator for the high-pressure section of a CO2 refrigeration unit is provided. This invention applies to the high-pressure section of a CO2 refrigeration unit, with a pressure-bearing capacity of at least 12 MPa. The separator is located between the outlet of the gas cooler and the inlet of the ejector. It prevents liquid from the gas-liquid two-phase refrigerant after cooling from the gas cooler from entering the high-pressure inlet of the ejector, thus preventing a decrease in ejector efficiency.

[0004] The technical means adopted in this utility model are as follows:

[0005] A separator for the high-pressure section of a CO2 refrigeration unit includes a separator cylinder. A refrigerant inlet is provided on the outer wall of the separator cylinder. An impact plate is provided in the separator cylinder at the position corresponding to the refrigerant inlet. An upper guide plate is above the impact plate. A gaseous refrigerant outlet is provided at the top of the separator cylinder. A lower guide plate is provided below the impact plate of the separator cylinder. A liquid refrigerant outlet is provided below the lower guide plate.

[0006] Furthermore, an upper end cover is provided above the separator cylinder, and a lower end cover is provided below the separator cylinder. The gaseous refrigerant outlet is located on the upper end cover, and the liquid refrigerant outlet is located on the lower end cover.

[0007] Furthermore, the impact plate is vertically arranged, and multiple sets of auxiliary guide plates are arranged on the side of the impact plate facing the refrigerant inlet. The auxiliary guide plates are arranged in a herringbone shape. Specifically, each set of auxiliary guide plates forms a herringbone structure, and the left and right auxiliary guide plates of each set are staggered in the height direction. The cross section of all the auxiliary guide plates can completely cover the projection shape of the refrigerant inlet on the impact plate.

[0008] The back of the impact plate is connected to a middle guide plate, which is welded to the inside of the separator cylinder.

[0009] Furthermore, the middle layer guide plate is a circular plate with evenly distributed through holes. The sum of the cross-sectional areas of all the through holes must be greater than the cross-sectional area of ​​the refrigerant inlet. The middle layer guide plate not only serves to guide and separate refrigerant flow, but also acts as a back support to reinforce the impact plate.

[0010] Furthermore, the lower guide plate is a circular plate with a notch. The outer diameter of the lower guide plate matches the inner diameter of the separator cylinder, and it is welded to the inner side of the separator cylinder. The notch is located on the outer circumference of the circular plate to guide the refrigerant blocked by the impact plate. This allows the liquid refrigerant to flow into the lower layer and enter the system through the liquid refrigerant outlet pipe. Simultaneously, another key function of the lower guide plate is to guide the gaseous refrigerant from above to the upper middle and upper guide plates, preventing high-pressure gaseous refrigerant from impacting the liquid surface of the lower liquid refrigerant, thus avoiding instability that could affect the monitoring data of the liquid level sensor.

[0011] Furthermore, the upper guide plate is a circular plate with evenly distributed through holes, and the sum of the cross-sectional areas of all the through holes must be greater than the cross-sectional area of ​​the refrigerant inlet.

[0012] Furthermore, the positions of the circular holes in the upper and middle guide vanes are completely staggered and do not overlap.

[0013] Furthermore, a filter screen is installed between the upper guide plate and the upper cover of the separator. The filter screen is made of stainless steel, and its height is typically around 100mm, with a mesh size of 100-150 mesh. The filter screen height and mesh size can also be adjusted according to different operating conditions.

[0014] Furthermore, the separator fixing component is located on the outside of the separator cylinder and welded to the separator cylinder. The size and number of the separator fixing component can be adjusted according to different operating conditions.

[0015] Furthermore, it is applied to the high-pressure section of CO2 refrigeration units, in the pre-separation system after the gas cooler outlet and before the ejector.

[0016] Compared with existing technologies, this invention has the following advantages: The separator added before the ejector allows refrigerant to enter through the refrigerant inlet and flow directly to the impact plate. This causes the liquid to fall naturally through the gaps around the lower guide plate, flowing into the lower end cover of the separator, and then into the pressure regulating valve through the liquid refrigerant outlet. Gaseous refrigerant, guided by the lower guide plate, then through the middle and upper guide plates, and passing through the filter screen, enters the ejector through the gas refrigerant outlet. This separates the gas and liquid refrigerant from the gas cooler, ensuring that only gaseous refrigerant enters the ejector, thus guaranteeing its efficiency. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the external structure of this utility model.

[0019] Figure 2 This is an exploded view of the structure of this utility model.

[0020] In the diagram: 1. Separator cylinder, 2. Separator upper cover, 3. Filter screen, 4. Upper guide plate, 5. Refrigerant inlet, 6. Impact plate, 7. Lower guide plate, 8. Liquid level sensor interface, 9. Gas refrigerant outlet, 10. Middle guide plate, 11. Separator fixing component, 12. Separator lower cover, 13. Liquid refrigerant outlet. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] like Figure 1 , Figure 2 As shown in the figure, this utility model embodiment discloses a separator for the high-pressure section of a CO2 refrigeration unit, including a separator cylinder 1. A refrigerant inlet 5 is provided on the outer wall of the separator cylinder. An impact plate 6 is provided in the separator cylinder at the position corresponding to the refrigerant inlet. Above the impact plate is an upper guide plate 4. A gaseous refrigerant outlet 9 is provided above the separator cylinder. A lower guide plate 7 is provided below the impact plate of the separator cylinder. A liquid refrigerant outlet 13 is provided below the lower guide plate.

[0029] Furthermore, a separator upper end cover 2 is provided above the separator cylinder, and a separator lower end cover 12 is provided below the separator cylinder. The gaseous refrigerant outlet is located on the separator upper end cover, and the liquid refrigerant outlet is located on the separator lower end cover.

[0030] Furthermore, the impact plate is vertically arranged, and multiple sets of auxiliary guide plates are arranged on the side of the impact plate facing the refrigerant inlet. The auxiliary guide plates are arranged in a herringbone shape. Specifically, each set of auxiliary guide plates forms a herringbone structure, and the left and right auxiliary guide plates of each set are staggered in the height direction. The cross section of all the auxiliary guide plates can completely cover the projection shape of the refrigerant inlet on the impact plate.

[0031] The back of the impact plate is connected to a middle guide plate 10, which is welded to the inside of the separator cylinder.

[0032] Furthermore, the middle layer guide plate is a circular plate with evenly distributed through holes. The sum of the cross-sectional areas of all the through holes must be greater than the cross-sectional area of ​​the refrigerant inlet. The middle layer guide plate not only serves to guide and separate refrigerant flow, but also acts as a back support to reinforce the impact plate.

[0033] Furthermore, the lower guide plate is a circular plate with a notch. The outer diameter of the lower guide plate matches the inner diameter of the separator cylinder, and it is welded to the inner side of the separator cylinder. The notch is located on the outer circumference of the circular plate to guide the refrigerant blocked by the impact plate. This allows the liquid refrigerant to flow into the lower layer and enter the system through the liquid refrigerant outlet pipe. Simultaneously, another key function of the lower guide plate is to guide the gaseous refrigerant from above to the upper middle and upper guide plates, preventing high-pressure gaseous refrigerant from impacting the liquid surface of the lower liquid refrigerant, thus avoiding instability that could affect the monitoring data of the liquid level sensor.

[0034] Furthermore, the upper guide plate is a circular plate with evenly distributed through holes, and the sum of the cross-sectional areas of all the through holes must be greater than the cross-sectional area of ​​the refrigerant inlet.

[0035] Furthermore, the positions of the circular holes in the upper and middle guide vanes are completely staggered and do not overlap.

[0036] Furthermore, a filter screen 3 is installed between the upper guide plate and the upper cover of the separator. The filter screen is made of stainless steel, and the height of a stainless steel filter screen is usually around 100mm, with a mesh size of 100 to 150 mesh. The filter screen height and mesh size can also be adjusted according to different operating conditions.

[0037] Furthermore, a separator fixing component 11 is provided on the outside of the separator cylinder and welded to the separator cylinder. The size and number of the separator fixing components can be adjusted according to different operating conditions.

[0038] Furthermore, it is applied to the high-pressure section of CO2 refrigeration units, in the pre-separation system after the gas cooler outlet and before the ejector.

[0039] During operation, the refrigerant flowing from the air cooler to the separator enters the separator through the refrigerant inlet 5 and flows directly to the impact plate 6. This allows the liquid to naturally fall through the gaps around the lower guide plate 7, flowing into the lower end cover 12 of the separator, and then into the pressure regulating valve through the liquid refrigerant outlet 13. Meanwhile, the gaseous refrigerant, guided by the lower guide plate 7, passes through the middle guide plate 10 and the upper guide plate 4, and then through the filter screen 3, entering the ejector through the gas refrigerant outlet 9. This process separates the gaseous and liquid refrigerant from the air cooler, ensuring that only gaseous refrigerant enters the ejector, thus guaranteeing its efficiency.

[0040] As an expandable implementation, the separator cylinder 1 is also provided with a liquid level sensor interface 8, which is located in the interval between the lower guide plate and the lower end cover of the separator, and is used to monitor the liquid level in the separator.

[0041] This invention is located between the outlet of the gas cooler and the high-pressure gas inlet of the ejector, and is applicable with or without a parallel heat exchanger. After the high-pressure CO2 gas passes through the gas cooler, a small amount of liquid or mist-like CO2 gas will enter the high-pressure gas inlet of the ejector through the pipeline. By installing a separator before the ejector, the gas can be separated and directly enter the high-pressure gas inlet of the ejector. The separated liquid or mist-like gas can be converted into liquid through a pressure regulating valve and enter the flash tank.

[0042] This invention can separate the gas and liquid in the high-pressure section without sacrificing any system energy efficiency, so that the refrigerant entering the high-pressure gas inlet of the ejector is in a gaseous state, thus ensuring the efficiency of the ejector and the energy efficiency of the system.

[0043] 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 separator for the high-pressure section of a CO2 refrigeration unit, characterized in that, The separator includes a separator cylinder, the outer wall of which is provided with a refrigerant inlet. An impact plate is provided in the separator cylinder at the position corresponding to the refrigerant inlet. Above the impact plate is an upper guide plate. A gaseous refrigerant outlet is provided at the top of the separator cylinder. A lower guide plate is provided below the impact plate of the separator cylinder. A liquid refrigerant outlet is located below the lower baffle plate.

2. The separator for the high-pressure section of a CO2 refrigeration unit according to claim 1, characterized in that, The separator cylinder is provided with an upper end cover and a lower end cover. The gaseous refrigerant outlet is located on the upper end cover and the liquid refrigerant outlet is located on the lower end cover.

3. The separator for the high-pressure section of a CO2 refrigeration unit according to claim 1, characterized in that, The impact plate is vertically arranged, and multiple sets of auxiliary guide plates are arranged on the side of the impact plate facing the refrigerant inlet. The auxiliary guide plates are arranged in a herringbone shape. Specifically, each set of auxiliary guide plates forms a herringbone structure, and the left and right auxiliary guide plates of each set are staggered in the height direction. The cross section of all the auxiliary guide plates can completely cover the projection shape of the refrigerant inlet on the impact plate. The back of the impact plate is connected to a middle guide plate, which is welded to the inside of the separator cylinder.

4. The separator for the high-pressure section of a CO2 refrigeration unit according to claim 3, characterized in that, The middle layer guide plate is a circular plate with evenly distributed through holes. The sum of the cross-sectional areas of all the through holes must be greater than the cross-sectional area of ​​the refrigerant inlet.

5. The separator for the high-pressure section of a CO2 refrigeration unit according to claim 1, characterized in that, The lower guide plate is a circular plate with a notch. The outer diameter of the lower guide plate matches the inner diameter of the separator cylinder. It is welded to the inner side of the separator cylinder. The notch is set on the outer circumferential surface of the circular plate to guide the refrigerant blocked by the impact plate.

6. The separator for the high-pressure section of a CO2 refrigeration unit according to claim 1, characterized in that, The upper guide plate is a circular plate with evenly distributed through holes. The sum of the cross-sectional areas of all the through holes must be greater than the cross-sectional area of ​​the refrigerant inlet.

7. The separator for the high-pressure section of a CO2 refrigeration unit according to claim 3, characterized in that, The positions of the circular holes in the upper and middle guide vanes are all staggered and do not overlap.

8. The separator for the high-pressure section of a CO2 refrigeration unit according to claim 1, characterized in that, A filter screen with a mesh size of 100 to 150 mesh is provided between the upper guide plate and the upper cover of the separator.

9. The separator for the high-pressure section of a CO2 refrigeration unit according to claim 1, characterized in that, The separator for the high-pressure section of a CO2 refrigeration unit is used in the pre-separation system after the outlet of the gas cooler and before the ejector in the high-pressure section of the CO2 refrigeration unit.

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