Refrigerant automatic flow regulator and refrigerant distributor flow equalizing device using the same

Abstract

The utility model discloses a kind of refrigerant automatic flow regulator and the refrigerant distributor uniform flow device of its application, refrigerant automatic flow regulator includes tubular shell, there is hole seat inside shell, hole seat has through-hole, the cap body is externally equipped in the orifice of through-hole one end, the cap body is installed in the inside of shell by the core body made of thermal expansion and contraction material;Refrigerant distributor uniform flow device includes distributor, and the distribution pipe of distributor, distribution flow passage at least one is connected with refrigerant automatic flow regulator in communication.The utility model can obviously improve the problem that each part temperature of evaporator is uneven due to the uneven distribution of distributor.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning refrigerant distributors, specifically an automatic refrigerant flow regulator and its application in refrigerant distributor flow equalization devices. Background Technology

[0002] In air conditioning systems, the refrigerant, after being throttled by the expansion valve, needs to be distributed by a refrigerant distributor into multiple paths, each entering a branch of the evaporator. In practical applications, uneven distribution often occurs in the refrigerant distributor, meaning some branches have excessively high flow rates while others have insufficient flow rates. The refrigerant temperature in the branch with excessive flow is significantly lower than in other branches. This phenomenon is almost unavoidable due to factors such as manufacturing precision variations in the distributor branches and the imperfect heat exchange rates in each evaporator branch. These minor deviations can amplify the uneven distribution under frosting conditions. Specifically, the distribution pipes of the excessively high-flow branches are more prone to frosting, while the distribution pipes of the lower-flow branches show significantly less frosting, or even no frosting at all. Therefore, due to the uneven distribution, the temperature of the refrigerant delivered to the corresponding part of the evaporator from the excessively high-flow branches is significantly lower than that from the lower-flow branches, leading to uneven refrigerant temperature within the evaporator. Uneven refrigerant temperature inside the evaporator can further cause a significant decrease in evaporator performance, reduce energy efficiency ratio, and even lead to malfunctions such as localized fin frost formation and compressor liquid slugging due to a drop in evaporation pressure.

[0003] To solve this problem, it is necessary to improve the processing precision of the distributor to make the distribution more uniform. However, this method requires high processing precision of the distributor. In fact, even small errors in processing can lead to uneven distribution, and the uneven distribution will continue to expand during cooling operation, resulting in different performance levels or even unqualified products in the same batch of air conditioners. Utility Model Content

[0004] This invention provides an automatic refrigerant flow regulator and a flow equalization device for its application in a refrigeration distributor, in order to solve the problem of uneven refrigerant temperature in different parts of the evaporator caused by uneven distribution in the refrigeration distributor in existing air conditioning systems.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An automatic refrigerant flow regulator includes a tubular housing (2d), a hole seat (2c) is fixedly disposed inside the housing (2d), the hole seat (2c) has at least one set of through holes, the hole seat (2c) divides the interior of the housing (2d) into two sections, and each through hole of the hole seat (2c) connects the two sections inside the housing (2d); Inside the housing (2d), a cap (2e) is provided at one end of each through hole of the hole seat (2c). The outer diameter of the cap (2e) is larger than the diameter of the corresponding through hole. The projection of the cap (2e) on the hole seat (2c) completely covers the corresponding opening of the corresponding through hole. The cap (2e) is installed inside the housing (2d) by a core (2b) made of thermally expanding and contracting material.

[0006] Furthermore, the core (2b) corresponding to each cap (2e) passes through the through hole in the corresponding hole seat (2c) of the cap (2e), and there is a clearance fit between each core (2b) and the through hole; the two ends of each core (2b) extend into the two sections inside the shell (2d), each cap (2e) is fixed to one end of the corresponding core (2b), and the other end of each core (2b) is fixed in the corresponding section inside the shell (2d).

[0007] Furthermore, the other end of each core (2b) is fixed to the corresponding segment inside the housing (2d) by a fixing pin (2a).

[0008] A refrigerant distributor flow equalization device includes a distributor (1), which has a main channel and multiple distribution channels. One end of each distribution channel is connected to one end of the main channel, and the other end of the main channel is located on the side of the distributor (1) to form an inlet. The other end of each distribution channel is located on the side of the distributor (1) to form a distribution port. Each distribution port of the distributor (1) is connected to a distribution pipe (3), and each distribution pipe (3) is connected to the aforementioned refrigerant automatic flow regulator (2).

[0009] Furthermore, each distribution channel is connected to the aforementioned refrigerant automatic flow regulator (2).

[0010] A refrigerant distributor flow equalization device includes a distributor (1), which has a main channel and multiple distribution channels. One end of each distribution channel is connected to one end of the main channel, and the other end of the main channel is located on the side of the distributor (1) to form an inlet. The other end of each distribution channel is located on the side of the distributor (1) to form a distribution port. Each distribution port of the distributor (1) is connected to a distribution pipe (3), and each distribution channel is connected to the aforementioned refrigerant automatic flow regulator (2).

[0011] In this invention, at least one of the distribution pipe and distribution channel of the distributor is integrated with an automatic refrigerant flow regulator. This automatic refrigerant flow regulator uses a thermally expandable and contraction-sensitive core. Based on the refrigerant temperature, the core adjusts the flow gap between the cap and the through-hole. When the refrigerant temperature decreases, the core shortens due to thermal expansion and contraction, reducing the flow gap between the cap and the through-hole, thereby reducing the refrigerant flow rate. When the refrigerant temperature rises, the core lengthens due to thermal expansion and contraction, increasing the flow gap between the cap and the through-hole, thereby increasing the refrigerant flow rate.

[0012] Therefore, when uneven distribution in the distributor results in some branches having high flow rates and others having low flow rates, the refrigerant automatic flow regulator of this invention can adjust the refrigerant flow rate in the corresponding branches according to the temperature. Specifically, in branches with excessive flow rates, the cooling of the core reduces the flow gap between the cap and the orifice, thereby reducing the refrigerant flow rate in the corresponding branch and increasing the refrigerant temperature in the corresponding branch. In branches with low flow rates, the thermal expansion of the core increases the flow gap between the cap and the orifice, thereby increasing the refrigerant flow rate in the corresponding branch and decreasing the refrigerant temperature in the corresponding branch.

[0013] This invention employs an automatic refrigerant flow regulator based on the principle of thermal expansion and contraction. It automatically adjusts the flow rate of different branches according to the refrigerant temperature in different branches, which can effectively address the problem of uneven refrigerant temperature in different parts of the evaporator caused by uneven distribution by the distributor.

[0014] This invention can significantly improve the problem of uneven temperature distribution in different parts of the evaporator caused by uneven distribution by the distributor, and has the following advantages: 1. Automatic adjustment, requiring neither electronic nor manual adjustment; 2. It is easy to use. Just install an automatic refrigerant flow regulator on each branch of the distributor. No manual adjustment is required.

[0015] 3. Fully mechanical self-adjusting mechanism, ensuring high reliability. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the flow equalization device of the refrigeration distributor in an embodiment of this utility model.

[0017] Figure 2 This is a structural diagram of the automatic refrigerant flow regulator in an embodiment of this utility model.

[0018] Figure 3 This is a state diagram of the refrigerant automatic flow regulator reducing the flow rate in an embodiment of this utility model.

[0019] Figure 4This is a state diagram of the refrigerant automatic flow regulator increasing the flow rate in an embodiment of this utility model.

[0020] Figure 5 This is a structural diagram of a multi-hole refrigerant automatic flow regulator in an embodiment of the utility model. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Example 1 like Figure 1 As shown, this embodiment discloses a refrigeration distributor flow equalization device, including a distributor 1. The distributor 1 has a main channel 1a and multiple distribution channels 1b. One end of each distribution channel 1b is connected to one end of the main channel 1a. The other end of the main channel 1a is located on one side of the distributor 1 to form an inlet. The other end of each distribution channel 1b is located on the other side of the distributor 1 to form a distribution port. Each distribution port of the distributor 1 is connected to a distribution pipe 3. Each distribution pipe 3 is used to connect different parts of the air conditioner evaporator. Each distribution channel 1b and the corresponding distribution pipe 3 constitute a branch of the distributor 1.

[0023] In this embodiment, each distribution pipe 3 is connected to an automatic refrigerant flow regulator 2, or each distribution channel 1b of the distributor 1 is connected to an automatic refrigerant flow regulator 2, or each distribution pipe 3 and each distribution channel 1b of the distributor 1 is connected to an automatic refrigerant flow regulator 2.

[0024] like Figure 2 As shown, the refrigerant automatic flow regulator 2 disclosed in this embodiment includes a tubular housing 2d, with pipe openings at both axial ends. A cylindrical seat 2c is coaxially fixed inside the housing 2d. The outer diameter of the seat 2c matches the inner diameter of the housing 2d, and the circumferential side of the seat 2c is fixed to the circumferential inner wall of the housing 2d. The seat 2c divides the interior of the housing 2d into two sections axially.

[0025] The center of the hole seat 2c is coaxially provided with a through hole 2f, which connects the two sections inside the shell 2d.

[0026] Inside one section of the housing 2d, there is a cap 2e. The cap 2e is round and coaxial with the through hole 2f at the center of the hole seat 2c. The cap 2e is located outside one end of the through hole 2f. The outer diameter of the cap 2e is larger than the diameter of the through hole 2f, so that the projection of the cap 2e on the corresponding end of the hole seat 2c in the axial direction completely covers the corresponding opening of the through hole 2f.

[0027] A core 2b is coaxially fixed to the side of the cap 2e facing the corresponding through hole 2f. The core 2b is made of a material that expands and contracts with temperature. The core 2b passes through the through hole 2f and extends into another section of the shell 2d. The core 2b and the through hole 2f are fitted with a clearance.

[0028] The end of the core 2b located inside another section of the shell 2d is radially connected with a fixing pin 2a, and the two ends of the fixing pin 2a are respectively fixed to the circumferential inner wall of the shell 2d.

[0029] When the refrigerant automatic flow regulator 2 is connected to the distribution pipe 3, the distribution pipe 3 is disconnected in the middle. The two ends of the housing 2d in the refrigerant automatic flow regulator 2 are connected to the two broken ends of the distribution pipe 3, thereby connecting the refrigerant automatic flow regulator 2 to the distribution pipe 3.

[0030] When the refrigerant automatic flow regulator 2 is connected to the distribution channel 1b, the middle of the distribution channel 1b is disconnected. The two ends of the housing 2d in the refrigerant automatic flow regulator 2 are connected to the two disconnected ends of the distribution channel 1b, thereby connecting the refrigerant automatic flow regulator 2 to the distribution channel 1b.

[0031] In this embodiment, the liquid refrigerant of the refrigeration system is distributed by distributor 1 before entering the evaporator, and then enters various parts of the evaporator of the refrigeration system through distribution pipe 3. The core component of the refrigerant automatic flow regulator 2 in this embodiment is core 2b, which is connected to cap 2e at its upper part. Core 2b is made of a material that is extremely sensitive to thermal expansion and contraction and has a very high coefficient of thermal expansion.

[0032] The core 2b passes through the through hole 2f and is fixed inside the housing 2d by the fixing pin 2a. The hole seat 2c is fixed inside the housing 2d. The refrigerant flows into the housing 2d from one end of the pipe opening, then flows through the gap between the axially corresponding ends of the cap 2e and the hole seat 2c, and the circumferential gap between the core 2b and the through hole 2f, before flowing into the other end of the housing 2d and finally flowing out from the other end of the pipe opening.

[0033] like Figure 3 As shown, if the refrigerant temperature is low, the core 2b will shrink due to thermal expansion and contraction, and the cap 2e connected to the core 2b will move towards the hole seat 2c, narrowing the gap between the cap 2e and the hole seat 2c, thereby reducing the refrigerant flow and creating a flow restriction effect.

[0034] like Figure 4 As shown, when the refrigerant temperature rises, the core 2b expands and elongates due to thermal expansion and contraction. The cap 2e connected to the core 2b moves away from the orifice 2c, widening the gap between the cap 2e and the orifice 2c, thereby increasing the refrigerant flow rate.

[0035] Therefore, if the refrigerant temperature in the different branches of distributor 1 is different due to uneven distribution, the branch with a larger flow rate will have a lower temperature. Due to the presence of refrigerant automatic flow regulator 2, the flow rate in the branch with a larger flow rate will be limited, thereby reducing the refrigerant flow rate in the branch with a larger flow rate and lowering the refrigerant temperature in the branch with a larger flow rate. This improves the problem of uneven refrigerant temperature in different parts of the evaporator caused by uneven distribution of the distributor.

[0036] As described above, this embodiment adds an automatic refrigerant flow regulator to the distribution pipe after the refrigerant distributor. It relies on the mechanical structure and temperature changes to cause the thermal expansion and contraction effect of the core of the automatic flow regulator, which causes a change in length, and automatically improves the phenomenon of uneven flow distribution. Its structure is simple and reliable and has great practical value.

[0037] Example 2 like Figure 1 As shown, this embodiment discloses a refrigeration distributor flow equalization device, including a distributor 1. The distributor 1 has a main channel 1a and multiple distribution channels 1b. One end of each distribution channel 1b is connected to one end of the main channel 1a. The other end of the main channel 1a is located on one side of the distributor 1 to form an inlet. The other end of each distribution channel 1b is located on the other side of the distributor 1 to form a distribution port. Each distribution port of the distributor 1 is connected to a distribution pipe 3. Each distribution pipe 3 is used to connect different parts of the air conditioner evaporator.

[0038] In this embodiment, each distribution pipe 3 is connected to an automatic refrigerant flow regulator 2, or each distribution channel 1b of the distributor 1 is connected to an automatic refrigerant flow regulator 2, or each distribution pipe 3 and each distribution channel 1b of the distributor 1 is connected to an automatic refrigerant flow regulator 2.

[0039] This embodiment also discloses an automatic refrigerant flow regulator 2, including a tubular housing 2d, with pipe openings at both axial ends. A cylindrical seat 2c is coaxially fixed inside the housing 2d, the outer diameter of which matches the inner diameter of the housing 2d, and the circumferential side of the seat 2c is fixed to the circumferential inner wall of the housing 2d, thus dividing the interior of the housing 2d into two sections axially by the seat 2c.

[0040] like Figure 5 As shown, the hole seat 2c has at least one set of through holes 2f. The axial direction of each set of through holes 2f is parallel to the axial direction of the hole seat 2c and the shell 2d. One set of through holes 2f is located at the center of the hole seat 2c as a central through hole. Each set of through holes 2f in the hole seat 2c connects the two sections inside the shell 2d respectively.

[0041] Inside one section of the housing 2d, there are several caps 2e, each cap 2e being round. The caps 2e correspond one-to-one with each through hole 2f in the hole seat 2c, and each cap 2e is located outside one end of the corresponding through hole 2f. The outer diameter of each cap 2e is larger than the diameter of the corresponding through hole 2f, so that the projection of each cap 2e on the corresponding end of the hole seat 2c in the axial direction completely covers the corresponding opening of the corresponding through hole 2f.

[0042] Each cap 2e has a core 2b coaxially fixedly connected to the side facing the corresponding through hole 2f. The core 2b is made of a material that expands and contracts with temperature. Each core 2b passes through the corresponding through hole 2f and extends into another section of the shell 2d. The length of the penetration section (the part of the core that penetrates into another section of the shell 2d) of each core 2b is different, and there is a clearance fit between each core 2b and the through hole 2f.

[0043] Each core 2b is radially mounted with a fixing pin 2a at its end located in another section of the housing 2d. The two ends of each fixing pin 2a are fixed to the circumferential inner wall of the housing 2d, and the fixing positions of each fixing pin 2a on the circumferential inner wall of the housing 2d are at different axial heights within the housing 2d.

[0044] When the refrigerant automatic flow regulator 2 is connected to the distribution pipe 3, the distribution pipe 3 is disconnected in the middle. The two ends of the housing 2d in the refrigerant automatic flow regulator 2 are connected to the two broken ends of the distribution pipe 3, thereby connecting the refrigerant automatic flow regulator 2 to the distribution pipe 3.

[0045] When the refrigerant automatic flow regulator 2 is connected to the distribution channel 1b, the middle of the distribution channel 1b is disconnected. The two ends of the housing 2d in the refrigerant automatic flow regulator 2 are connected to the two disconnected ends of the distribution channel 1b, thereby connecting the refrigerant automatic flow regulator 2 to the distribution channel 1b.

[0046] The preferred embodiments of this utility model have been described in detail above with reference to the accompanying drawings. These embodiments are merely descriptions of preferred embodiments and are not intended to limit the concept and scope of this utility model. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. Such combinations, as long as they do not violate the spirit of this utility model, should also be considered as part of this disclosure. To avoid unnecessary repetition, this utility model will not further describe all possible combinations.

[0047] This utility model is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this utility model and without departing from the design idea of ​​this utility model, all modifications and improvements made by those skilled in the art to the technical solution of this utility model should fall within the protection scope of this utility model. The technical content for which protection is sought in this utility model has been fully recorded in the claims.

Claims

1. An automatic refrigerant flow regulator, comprising a tubular housing (2d), characterized in that, A hole seat (2c) is fixedly provided inside the shell (2d). The hole seat (2c) has at least one set of through holes. The hole seat (2c) divides the interior of the shell (2d) into two sections, and each through hole of the hole seat (2c) connects the two sections inside the shell (2d). Inside the housing (2d), a cap (2e) is provided at one end of each through hole of the hole seat (2c). The outer diameter of the cap (2e) is larger than the diameter of the corresponding through hole. The projection of the cap (2e) on the hole seat (2c) completely covers the corresponding opening of the corresponding through hole. The cap (2e) is installed inside the housing (2d) by a core (2b) made of thermally expanding and contracting material.

2. The refrigerant automatic flow regulator according to claim 1, characterized in that, The core (2b) corresponding to each cap (2e) passes through the through hole in the corresponding hole seat (2c) of the cap (2e), and there is a clearance fit between each core (2b) and the through hole; the two ends of each core (2b) extend into the two sections inside the shell (2d), each cap (2e) is fixed to one end of the corresponding core (2b), and the other end of each core (2b) is fixed in the corresponding section inside the shell (2d).

3. The refrigerant automatic flow regulator according to claim 2, characterized in that, The other end of each core (2b) is fixed to the corresponding segment inside the shell (2d) by a fixing pin (2a).

4. A refrigeration distributor flow equalization device, comprising a distributor (1), wherein the distributor (1) has a main channel and a plurality of distribution channels, one end of each distribution channel is connected to one end of the main channel, the other end of the main channel is provided on the side of the distributor (1) to form an inlet, and the other end of each distribution channel is respectively provided on the side of the distributor (1) to form a distribution port, and each distribution port of the distributor (1) is respectively connected to a distribution pipe (3), characterized in that, Each distribution pipe (3) is connected to an automatic refrigerant flow regulator (2) as described in any one of claims 1-3.

5. A refrigeration distributor flow equalization device according to claim 4, characterized in that, Each distribution channel is connected to an automatic refrigerant flow regulator (2) as described in any one of claims 1-3.

6. A refrigeration distributor flow equalization device, comprising a distributor (1), wherein the distributor (1) has a main channel and a plurality of distribution channels, one end of each distribution channel is connected to one end of the main channel, the other end of the main channel is provided on the side of the distributor (1) to form an inlet, and the other end of each distribution channel is respectively provided on the side of the distributor (1) to form a distribution port, and each distribution port of the distributor (1) is respectively connected to a distribution pipe (3), characterized in that, Each distribution channel is connected to an automatic refrigerant flow regulator (2) as described in any one of claims 1-3.

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