Condensate backflow prevention line and condensate backflow prevention system

Abstract

The application discloses a condensation anti-backflow pipeline and a condensation anti-backflow system, and belongs to the technical field of liquid refrigerant anti-backflow of energy storage systems. One end of the condensation anti-backflow pipeline is used for being communicated with an air inlet of a condenser, and the other end of the condensation anti-backflow pipeline is used for being communicated with an air outlet of a compressor; wherein the condensation anti-backflow pipeline forms an inverted U-shaped elbow at a highest point, and the highest point is connected to the air inlet of the condenser and the air outlet of the compressor through downward extension on both sides. When the compressor enters a shutdown state, the liquid refrigerant in the condenser will flow back to the condensation anti-backflow pipeline from the air inlet of the condenser, and meanwhile, the liquid refrigerant needs to overcome the gravity resistance caused by the height difference between the highest point of the condensation anti-backflow pipeline and the lowest point of the condensation anti-backflow pipeline, so as to hinder the liquid refrigerant in the condenser from flowing into the air outlet of the compressor, thereby avoiding the problems of wet compression of the compressor, unstable system operation, heat exchange effect reduction and increased operation safety hazards.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of refrigeration equipment, and particularly relates to a condensation anti-backflow pipeline and a condensation anti-backflow system. BACKGROUND

[0002] To ensure the safe and stable operation of a water chiller, it is necessary to ensure that each device in each system operates under its normal working condition. As a main device, the compressor needs to be free of liquid refrigerant in the compression cavity to avoid wet compression, which may cause unstable system operation, heat exchange effect decline and increase of operation safety hazards.

[0003] In the process of implementing the present application, the inventors found that at least the following problems exist in the prior art: When the compressor enters a shutdown state, the refrigerant in the condenser is likely to flow back into the compressor, and wet compression will occur after the next start of the compressor, resulting in damage. SUMMARY

[0004] The present application aims to improve the technical problem that when the compressor enters a shutdown state, the refrigerant in the condenser is likely to flow back into the compressor, and wet compression will occur after the next start of the compressor, resulting in damage in the prior art.

[0005] In a first aspect, the present application provides a condensation anti-backflow pipeline, one end of the condensation anti-backflow pipeline being used to communicate with an air inlet of a condenser, and the other end of the condensation anti-backflow pipeline being used to communicate with an air outlet of a compressor.

[0006] The condensation anti-backflow pipeline forms an inverted U-shaped bend at a highest point, and the highest point is connected to the air inlet of the condenser and the air outlet of the compressor on both sides.

[0007] According to one embodiment of the present application, the lowest point of the condensation anti-backflow pipeline is located on the pipeline between the highest point and the air inlet of the condenser, and the condensation anti-backflow pipeline extends upward from the lowest point and is connected to the air inlet of the condenser.

[0008] According to one embodiment of the present application, the condensation anti-backflow pipeline comprises an anti-backflow part and a first connecting part in communication with the anti-backflow part.

[0009] The anti-backflow part is arranged to extend and bend from the highest point to the lowest point, and the first connecting part is arranged to extend and bend from the highest point to the air outlet of the compressor, and the first connecting part is used to communicate with the air outlet of the compressor.

[0010] According to one embodiment of the present application, the first connecting part comprises a first bend section, and the anti-backflow part comprises a second bend section.

[0011] The first elbow section and the second elbow section are in communication with the outer wall surface of the condenser;

[0012] According to an embodiment of the present application, the first connecting portion further comprises a first extension section in communication with the first elbow section; and the anti-backflow portion further comprises a first connecting pipe section in communication with the second elbow section.

[0013] The first connecting pipe section and the first extension section are both separated from the outer wall surface of the condenser, and the first extension section is used to communicate with the exhaust port of the compressor; and / or the distance between the first elbow section and the second elbow section is less than the distance between the first connecting pipe section and the first extension section.

[0014] According to an embodiment of the present application, the anti-backflow portion further comprises a second connecting portion in communication with the anti-backflow portion.

[0015] The second connecting portion is arranged to extend in a direction from the lowest point to the air inlet of the condenser, and is used to communicate with the air inlet of the condenser.

[0016] According to an embodiment of the present application, the second connecting portion comprises a second connecting section and a third connecting section in communication with each other.

[0017] The second connecting section is in communication with the anti-backflow portion, and is arranged to extend in a first direction; and the third connecting section is used to communicate with the air inlet of the condenser.

[0018] According to an embodiment of the present application, the anti-backflow portion further comprises a fixing member.

[0019] The fixing member is arranged to be sleeved on the second connecting portion and the outer shell of the compressor in the first direction, so as to fix the position of the second connecting portion.

[0020] In a second aspect, the present application provides a condensing anti-backflow system, which comprises the condensing anti-backflow pipeline, the condenser and the compressor according to any one of the above embodiments.

[0021] The condenser comprises a first condensing portion and a second condensing portion connected with each other, the first condensing portion is parallel to the first direction, and forms an included angle with the second condensing portion.

[0022] The first condensing portion has an air inlet in communication with the condensing anti-backflow pipeline; or the second condensing portion has an air inlet in communication with the condensing anti-backflow pipeline.

[0023] According to one embodiment of the present application, the condensation anti-backflow pipeline is close to the outer wall surface of the condenser from the pipelines on both sides of the highest point.

[0024] The one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0025] In the above embodiments of the present application, when the compressor enters the shutdown state, the liquid refrigerant in the condenser will flow back from the air inlet of the condenser to the condensation anti-backflow pipeline, and at the same time, the liquid refrigerant needs to overcome the gravitational resistance caused by the height between the highest point of the condensation anti-backflow pipeline and the lowest point of the condensation anti-backflow pipeline to hinder the liquid refrigerant in the condenser from flowing into the exhaust port of the compressor. The present application realizes effective prevention of the problem of wet compression damage of the compressor in a low-cost manner.

[0026] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings, wherein:

[0028] Figure 1 FIG. 1 is a structural schematic diagram of a condensation anti-backflow system provided by an embodiment of the present application.

[0029] Reference Signs:

[0030] 10, anti-backflow part;

[0031] 11, second elbow segment; 12, first connecting pipe segment;

[0032] 20, first connecting part;

[0033] 21, first elbow segment; 22, first extension segment;

[0034] 30, second connecting part;

[0035] 31, second connecting segment; 32, third connecting segment;

[0036] 1, condensation anti-backflow pipeline; 2, condenser; 3, compressor;

[0037] a, highest point; b, lowest point. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for the purpose of explaining the present application, and cannot be understood as a limitation of the present application.

[0039] Reference is made below Figure 1 A condensation anti-backflow pipeline 1 and a condensation anti-backflow system according to embodiments of the present application are described.

[0040] The condensation anti-backflow pipeline 1 is used to prevent the backflow of liquid refrigerant condensed from gaseous refrigerant in the condenser 2 into the compressor 3 cavity from the exhaust port of the compressor 3, thereby avoiding wet compression of the compressor 3 and ensuring the safe and stable operation of the water chiller.

[0041] The condensation anti-backflow pipeline 1 forms an inverted U-shaped bend at the highest point a, and the highest point a extends downward on both sides to be connected to the air inlet of the condenser 2 and the exhaust port of the compressor 3.

[0042] It should be noted that a height difference is formed between the highest point a of the condensation anti-backflow pipeline 1 and the lowest point b of the condensation anti-backflow pipeline 1 to hinder the flow of liquid refrigerant in the condenser 2 into the exhaust port of the compressor 3.

[0043] In the above embodiments of the present application, when the compressor 3 enters the shutdown state, the liquid refrigerant in the condenser 2 will flow back into the condensation anti-backflow pipeline 1 from the air inlet of the condenser 2, and the liquid refrigerant needs to overcome the gravitational resistance caused by the height difference between the highest point a of the condensation anti-backflow pipeline 1 and the lowest point b of the condensation anti-backflow pipeline 1 to hinder the flow of liquid refrigerant in the condenser 2 into the exhaust port of the compressor 3.

[0044] The present application avoids the problem of unstable operation of the water chiller and reduced heat exchange effect caused by wet compression of the compressor 3, and increases the safety risk of operation in a low-cost manner. At the same time, it can also avoid damage to the compressor 3.

[0045] In some embodiments, the lowest point b of the condensation anti-backflow pipeline 1 is located on the pipeline between the highest point a and the air inlet of the condenser 2, and the condensation anti-backflow pipeline 1 extends upward from the lowest point b to be connected to the air inlet of the condenser 2.

[0046] The condensation anti-backflow pipeline 1 comprises an anti-backflow part 10 and a first connecting part 20 in communication with the anti-backflow part 10.

[0047] The anti-backflow part 10 is arranged to extend in a direction from the highest point a to the lowest point b; and the first connecting part 20 is arranged to extend in a direction from the highest point a to the exhaust port of the compressor 3, and the first connecting part 20 is used to communicate with the exhaust port of the compressor 3.

[0048] In this embodiment, the anti-backflow part 10 extends in a direction from the highest point a to the lowest point b and then extends upward to be connected to the air inlet of the condenser 2, which can increase the path length of the condensation anti-backflow pipeline 1, thereby accommodating more liquid refrigerant and preventing the liquid refrigerant from flowing into the exhaust port of the compressor 3.

[0049] For example, the first connecting part 20 includes a first elbow section 21, and the anti-backflow part 10 includes a second elbow section 11.

[0050] The first elbow section 21 communicates with the second elbow section 11, and both the first elbow section 21 and the second elbow section 11 abut against the outer wall surface of the condenser 2.

[0051] The first connecting part 20 further includes a first extension section 22 that communicates with the first elbow section 21, and the anti-backflow part 10 further includes a first connecting pipe section 12 that communicates with the second elbow section 11.

[0052] The first connecting pipe section 12 and the first extension section 22 are both separated from the outer wall surface of the condenser 2, and the first extension section 22 is configured to communicate with the exhaust port of the compressor 3.

[0053] In this example, the first connecting pipe section 12 and the first extension section 22 are separated from the outer wall surface of the condenser 2, which can form support points at the connection between the first connecting pipe section 12 and the first elbow section 21 and at the connection between the first extension section 22 and the second elbow section 11, thereby better abutting the first elbow section 21 and the second elbow section 11 against the outer wall surface of the condenser 2 to improve the stability and anti-vibration capability of the whole.

[0054] In the design and implementation, the distance between the first elbow section 21 and the second elbow section 11 is less than the distance between the first connecting pipe section 12 and the first extension section 22.

[0055] This design can make the anti-backflow part 10 extend in a larger range from the highest point a to the lowest point b, thereby increasing the volume of the anti-backflow part 10 and accommodating more liquid refrigerant, and can also make the distance between the first elbow section 21 and the second elbow section 11 smaller, thereby making the formed inverted U-shaped elbow more firmly contact the outer wall of the condenser 2.

[0056] In some embodiments, the condensation anti-backflow pipeline 1 further includes a second connecting part 30 that communicates with the anti-backflow part 10.

[0057] The second connecting part 30 extends in a direction from the lowest point b to the air inlet of the condenser 2 and is configured to communicate with the air inlet of the condenser 2.

[0058] In this embodiment, the bending extension design of the second connecting portion 30 increases the volume, which can accommodate more liquid refrigerant, and avoids the liquid refrigerant flowing into the exhaust port of the compressor 3.

[0059] For example, the second connecting portion 30 includes a second connecting segment 31 and a third connecting segment 32 which are in communication with each other.

[0060] The second connecting segment 31 is in communication with the anti-backflow portion 10, and the second connecting segment 31 is arranged to extend in the first direction; the third connecting segment 32 is used to communicate with the air inlet of the condenser 2.

[0061] In this example, the first direction can be a horizontal direction, and the design makes the connection between the second connecting segment 31 and the third connecting segment 32 form a support area, which is used for the sheath rope or other fixing member to be sheathed, so as to fix the second connecting portion 30 on the shell of the compressor 3.

[0062] For example, the condensing anti-backflow pipeline 1 further includes a fixing member; the fixing member is sheathed on the second connecting portion 30 and the shell of the compressor 3 along the first direction, so as to fix the position of the second connecting portion 30.

[0063] The present application also provides a condensing anti-backflow system, which includes the condensing anti-backflow pipeline 1 of any of the above embodiments, the condenser 2 and the compressor 3.

[0064] The condenser 2 includes a first condensing portion 201 and a second condensing portion 202 which are connected to each other, the first condensing portion 201 is parallel to the first direction, and forms an included angle with the second condensing portion 202.

[0065] For example, the first direction can be a horizontal direction, the first condensing portion 201 extends in the horizontal direction, the second condensing portion 202 is integrally formed with the first condensing portion 201 and extends in a direction below the horizontal direction, and the included angle between the first condensing portion 201 and the second condensing portion 202 can be greater than 90° or 90°. This embodiment is not limited.

[0066] The first condensing portion 201 has an air inlet in communication with the condensing anti-backflow pipeline 1; or the second condensing portion 202 has an air inlet in communication with the condensing anti-backflow pipeline 1.

[0067] In some embodiments, the condensing anti-backflow pipeline 1 is close to the outer wall surface of the condenser 2 from the pipelines on both sides of the highest point a.

[0068] The condensing anti-backflow system can be at least one of the following structural forms:

[0069] One, when the air inlet is at the end of the first condensing part 201, the compressor 3 can be arranged according to the layout requirement, closer to the air inlet, while one end of the condensing anti-backflow pipeline 1 is communicated with the air inlet of the condenser 2, and the other end of the condensing anti-backflow pipeline 1 is communicated with the exhaust port of the compressor 3 (not shown).

[0070] In this embodiment, since the first condensing part 201 is arranged horizontally, which makes the liquid refrigerant accumulated from the air inlet of the first condensing part 201 large, the distance of the height difference between the highest point a of the condensing anti-backflow pipeline 1 and the lowest point b of the condensing anti-backflow pipeline 1 can be adaptively reduced.

[0071] Meanwhile, it should be pointed out that, when the overall layout of the water chiller is considered, the compressor 3 and the condenser 2 in this embodiment will occupy a larger space of the water chiller, and the space utilization rate is low.

[0072] Two, when the air inlet is at the end of the second condensing part 202, one end of the condensing anti-backflow pipeline 1 is communicated with the air inlet of the condenser 2, and the other end of the condensing anti-backflow pipeline 1 is communicated with the exhaust port of the compressor 3 (as shown in Figure 1

[0073] In this embodiment, the second condensing part 202 extends in the direction below the horizontal direction, so that the liquid refrigerant accumulated from the air inlet of the second condensing part 202 is small, and the distance of the height difference between the highest point a of the condensing anti-backflow pipeline 1 and the lowest point b of the condensing anti-backflow pipeline 1 can be adaptively increased.

[0074] Meanwhile, compared with the first embodiment, the compressor 3 and the condenser 2 in this embodiment occupy a smaller space of the water chiller, and the space utilization rate is high.

[0075] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and are not limited in number, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the front and rear associated objects.

[0076] ​In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0077] In the description of the present application, "first feature" and "second feature" can include one or more of the features.

[0078] In the description of the present application, "a plurality of" means two or more.

[0079] In the description of the present application, "above" or "below" the first feature of the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0080] In the description of the present application, "above", "over" and "on" the first feature of the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0081] In the description of the present application, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0082] Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A condensate backflow prevention pipeline, characterized in that, The condensate anti-backflow pipeline (1) has an inverted U-shaped bend, including: an anti-backflow part (10) and a first connecting part (20) connected to the anti-backflow part (10); the anti-backflow part (10) and the first connecting part (20) extend downward from both sides of the highest point (a) of the bend, respectively. The first connecting part (20) includes: a first bend section (21) and a first extension section (22) communicating with the first bend section (21), the first extension section (22) being used to communicate with the exhaust port of the compressor (3); the anti-backflow part (10) being used to communicate with the air inlet of the condenser (2) includes: a second bend section (11) and a first connecting pipe section (12) communicating with the second bend section (11). Wherein, the first connecting pipe section (12) and the first extension section (22) are both separated from the outer wall surface of the condenser (2); and / or, the distance between the first bend section (21) and the second bend section (11) is less than the distance between the first connecting pipe section (12) and the first extension section (22).

2. The condensate backflow prevention pipeline according to claim 1, characterized in that, include: The lowest point (b) of the condensate backflow prevention pipeline (1) is located on the pipeline between the highest point (a) and the air inlet of the condenser (2), and the condensate backflow prevention pipeline (1) extends upward from the lowest point (b) to the air inlet of the condenser (2).

3. The condensate backflow prevention pipeline according to claim 2, characterized in that, The anti-backflow part (10) is bent and extended from the highest point (a) toward the lowest point (b); the first connecting part (20) is bent and extended from the highest point (a) toward the exhaust port of the compressor (3), and the first connecting part (20) is used to communicate with the exhaust port of the compressor (3).

4. The condensate backflow prevention pipeline according to claim 1, characterized in that, The first bend (21) is connected to the second bend (11), and both the first bend (21) and the second bend (11) abut against the outer wall of the condenser (2).

5. The condensate backflow prevention pipeline according to claim 2, characterized in that, It also includes: a second connecting part (30) that is connected to the anti-backflow part (10); The second connecting part (30) is bent and extended from the lowest point (b) toward the air inlet of the condenser (2), and the second connecting part (30) is used to communicate with the air inlet of the condenser (2).

6. The condensate backflow prevention pipeline according to claim 5, characterized in that, The second connecting part (30) includes: a second connecting segment (31) and a third connecting segment (32) that are interconnected; The second connecting section (31) is connected to the anti-backflow part (10), and the second connecting section (31) extends in the first direction; the third connecting section (32) is used to connect to the air inlet of the condenser (2).

7. The condensate backflow prevention pipeline according to claim 6, characterized in that, Also includes: Fasteners; The fastener is sleeved on the housing of the second connecting part (30) and the compressor (3) along the first direction to fix the position of the second connecting part (30).

8. A condensate backflow prevention system, characterized in that, Includes the condenser anti-backflow pipeline (1), condenser (2), and compressor (3) as described in any one of claims 1-7; The condenser (2) includes a first condensing section (201) and a second condensing section (202) connected to each other. The first condensing section (201) is parallel to a first direction and forms an angle with the second condensing section (202). The first condenser (201) has an air inlet that communicates with the condensation anti-backflow pipeline (1); or, the second condenser (202) has an air inlet that communicates with the condensation anti-backflow pipeline (1).

9. The condensate backflow prevention system according to claim 8, characterized in that, The anti-backflow condensate pipe (1) extends from both sides of the highest point (a) and is close to the outer wall of the condenser (2).

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