Air return pipe assembly of evaporator

By designing a hovering return pipe and a welded close-fitting heat exchange pipe in the evaporator return pipe, combined with the clamping mechanism of the U-shaped snap, the problems of low heat exchange efficiency and poor refrigeration effect in the existing evaporator return pipe design are solved, and more efficient cooling and refrigeration effects are achieved.

CN222911605UActive Publication Date: 2025-05-27HEFEI HONGLI REFRIGERATION TECH CO LTD
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Patent Information

Application Number
CN202422012219.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-19
Publication Date
2025-05-27
Estimated Expiration
2034-08-19

AI Technical Summary

Technical Problem

The existing evaporator return pipe design has problems such as low heat exchange efficiency and poor refrigeration effect, especially during the reflux and cooling process of the evaporator.

Method used

An evaporator return pipe assembly is designed, including a middle-section hovering return pipe, a heat exchange pipe welded closely to it, a thermal insulation sleeve provided on the return pipe and the heat exchange pipe, a capillary wound on the return pipe, and a first and second U-shaped snaps for clamping the thermal insulation sleeve.

Benefits of technology

The heat exchange efficiency and cooling speed are improved through the hovering design. The clamping mechanism of the U-shaped snap avoids the separation of the return air pipe and the heat exchange pipe, ensuring the improvement of the cooling effect.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222911605U_ABST
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Abstract

The utility model discloses an evaporator air return pipe assembly, and relates to the technical field of evaporator air return pipe assemblies. An evaporator air return pipe assembly comprises an air return pipe with the middle section in a spiral shape. The heat exchange pipe is tightly attached to the spiral shape of the air return pipe; the middle section of the air return pipe is arranged to be spiral, the heat exchange pipe is arranged at the spiral position of the air return pipe and is welded and attached to the air return pipe, the heat exchange pipe can conduct heat exchange on the air return pipe in a concentrated mode, and then the heat exchange efficiency can be improved. A first U-shaped buckle and a second U-shaped buckle are buckled on a heat preservation sleeve arranged on the air return pipe and the heat exchange pipe in a sleeving mode, so that the air return pipe and the heat exchange pipe can be further close to each other, and the situation that the air return pipe and the heat exchange pipe are separated due to cracking of the welding position of the air return pipe and the heat exchange pipe in the later period is avoided; and the heat exchange efficiency is reduced and the refrigeration effect is poor due to the fact that the attaching is not tight.
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Description

Technical Field

[0001] The utility model belongs to the technical field of evaporator return air pipe assemblies, and more specifically, relates to an evaporator return air pipe assembly. Background Art

[0002] The evaporator assembly is a commonly used cooling device, mainly applied in the medical field, and can be used for refrigerating medical items (such as blood bags). When in use, one end of the evaporator pipe is connected to a compressor, and the other end is connected to a return pipe and then connected to the compressor again to form a return air cooling, so as to refrigerate the medical items to be placed.

[0003] One of the main functions of the return air pipe is to recover the low-pressure refrigerant in the evaporator, and the design of the return air pipe is crucial, which determines the refrigeration performance and efficiency of the cooling device. Therefore, special attention needs to be paid to the installation design of the return air pipe. For this reason, an evaporator return air pipe assembly is proposed. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an evaporator return air pipe assembly that can overcome or at least partially solve the above problems.

[0005] To solve the above technical problem, the basic concept of the technical solution adopted by the utility model is: an evaporator return air pipe assembly, comprising: a return air pipe with a spiral shape in the middle section; a heat exchange pipe closely attached to the spiral shape of the return air pipe and welded to the return air pipe; a heat preservation sleeve sleeved on the welded return air pipe and heat exchange pipe; a capillary tube wound around the return air pipe; a first U-shaped buckle and a second U-shaped buckle sleeved on the heat preservation sleeve, the first U-shaped buckle and the second U-shaped buckle are connected, a mounting seat is fixedly connected to the second U-shaped buckle, and a mounting hole is provided on the mounting seat.

[0006] Preferably, the number of the capillary tubes is 2.

[0007] Preferably, the first U-shaped buckle is symmetrically fixedly connected with a clamping block, a wedge-shaped convex tooth is arranged on the clamping block, the second U-shaped buckle is symmetrically fixedly connected with a clamping ring, and one end of the clamping block is inserted into the clamping groove of the clamping ring.

[0008] Further, an inclined wall is arranged on the mounting seat, a side wall is arranged on the clamping block on the opposite surface of the wedge-shaped convex tooth, and the side wall is adjacent to the inclined wall; when one end of the clamping block is inserted into the clamping groove of the clamping ring, the side wall of the clamping block is attached to the inclined wall, so that the clamping block bends away from the inclined wall.

[0009] Furthermore, elastic buckles are fixedly connected to the end walls of the first U-shaped buckle and the second U-shaped buckle, and the elastic buckles are curved in an arc shape, and the elastic buckles on the first U-shaped buckle and the second U-shaped buckle correspond to each other.

[0010] Furthermore, the elastic buckle is bent toward the inner side of the first U-shaped buckle and the second U-shaped buckle.

[0011] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model arranges the middle section of the return air pipe into a spiral shape, arranges the heat exchange pipe at the spiral part of the return air pipe, and welds the heat exchange pipe tightly to the return air pipe, which is beneficial for the heat exchange pipe to centrally exchange heat with the return air pipe, thereby facilitating the improvement of heat exchange efficiency; and the spiral shape of the return air pipe can also accelerate the cooling of the items to be cooled;

[0012] And by buckling the first U-shaped buckle and the second U-shaped buckle on the heat preservation sleeve sleeved on the return air pipe and the heat exchange pipe, the heat preservation sleeve is clamped, so that the return air pipe and the heat exchange pipe can be further close together, so as to avoid the return air pipe and the heat exchange pipe being separated due to cracking at the welding place between the return air pipe and the heat exchange pipe in the later stage, resulting in loose fitting, which causes the heat exchange efficiency to decrease and the refrigeration effect to be poor, and the provided mounting seat can also facilitate the installation of the return air pipe, the heat exchange pipe and the heat preservation sleeve;

[0013] When the first U-shaped buckle and the second U-shaped buckle are connected, the elastic buckles on the first U-shaped buckle and the second U-shaped buckle will conflict with each other, so that the first U-shaped buckle and the second U-shaped buckle form a force moving away from each other under the resistance of the elastic buckles, which makes the wedge-shaped convex teeth on the clamping block and the clamping ring directly bite more tightly, further improving the clamping effect of the insulation sleeve, and further avoiding the separation of the return air pipe and the heat exchange pipe.

[0014] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In the attached picture:

[0016] Figure 1 This is a structural schematic diagram of a heat exchange tube of an evaporator return air pipe assembly proposed by the utility model;

[0017] Figure 2 The utility model provides an evaporator return air pipe assembly Figure 1 Schematic diagram of the A direction;

[0018] Figure 3 The utility model provides an evaporator return air pipe assembly Figure 1 Schematic diagram of the middle B direction;

[0019] Figure 4Schematic diagram of the capillary tube of an evaporator return air pipe assembly proposed by the present utility model;

[0020] Figure 5 Schematic diagram of the heat preservation sleeve of an evaporator return air pipe assembly proposed by the present utility model;

[0021] Figure 6 An evaporator return air pipe assembly proposed by the present utility model Figure 5 Cross-sectional view at C-C in;

[0022] Figure 7 Schematic diagram of the structure of the first U-shaped buckle and the second U-shaped buckle of an evaporator return air pipe assembly proposed by the present utility model;

[0023] Figure 8 Schematic diagram of the structure of the wedge-shaped convex teeth of an evaporator return air pipe assembly proposed by the present utility model;

[0024] Figure 9 Top view of an evaporator return air pipe assembly proposed by the present utility model;

[0025] Figure 10 Schematic diagram of the structure of the mounting hole of an evaporator return air pipe assembly proposed by the present utility model.

[0026] In the figure: 1, return air pipe; 10, spiral shape; 2, heat preservation sleeve; 3, heat exchange pipe; 4, capillary tube; 5, first U-shaped buckle; 51, clamping block; 511, side wall; 52, wedge-shaped convex teeth; 6, second U-shaped buckle; 61, clamping ring; 62, mounting seat; 63, mounting hole; 64, inclined wall; 7, elastic buckle. Specific implementation mode

[0027] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0028] Embodiment 1: Refer to Figures 1 - 10 , an evaporator return air pipe assembly, including: a return air pipe 1 with a spiral shape 10 at the middle section; a heat exchange pipe 3, closely attached to the spiral shape 10 of the return air pipe 1, and the heat exchange pipe 3 is welded to the return air pipe 1; a heat preservation sleeve 2, sleeved on the welded return air pipe 1 and heat exchange pipe 3; a capillary tube 4, wound around the return air pipe 1; the first U-shaped buckle 5 and the second U-shaped buckle 6 sleeved on the heat preservation sleeve 2, the first U-shaped buckle 5 and the second U-shaped buckle 6 are connected, a mounting seat 62 is fixedly connected to the second U-shaped buckle 6, and a mounting hole 63 is opened on the mounting seat 62; the number of capillary tubes 4 is 2;

[0029] The first U-shaped buckle 5 is symmetrically and fixedly connected with clamping blocks 51, and wedge-shaped convex teeth 52 are arranged on the clamping blocks 51. The second U-shaped buckle 6 is symmetrically and fixedly connected with clamping rings 61, and one end of the clamping block 51 is inserted into the clamping slot of the clamping ring 61;

[0030] The middle section of the return air pipe 1 is arranged in a spiral shape 10, and the heat exchange pipe 3 is arranged at the spiral shape 10 of the return air pipe 1 and is welded and closely attached to the return air pipe 1, which is beneficial for the heat exchange pipe 3 to centrally conduct heat exchange with the return air pipe 1, and thus is beneficial for improving the heat exchange efficiency;

[0031] Moreover, the spiral shape 10 of the return air pipe 1 can also accelerate the cooling of the items to be cooled;

[0032] And by buckling the first U-shaped buckle 5 and the second U-shaped buckle 6 on the heat preservation sleeve 2 sleeved on the return air pipe 1 and the heat exchange pipe 3, the heat preservation sleeve 2 is clamped, so that the return air pipe 1 and the heat exchange pipe 3 can be further close to each other, avoiding the separation of the return air pipe 1 and the heat exchange pipe 3 due to the cracking of the welded joint between the return air pipe 1 and the heat exchange pipe 3 in the later stage, resulting in poor fitting and a decrease in heat exchange efficiency, leading to poor refrigeration effect;

[0033] When the first U-shaped buckle 5 and the second U-shaped buckle 6 are connected, one end of the clamping block 51 on the first U-shaped buckle 5 is inserted into the clamping slot of the clamping ring 61, and the wedge-shaped convex teeth 52 on the clamping block 51 are engaged with the clamping slot of the clamping ring 61, so that the first U-shaped buckle 5 and the second U-shaped buckle 6 are connected and not easily separated;

[0034] And the mounting seat 62 on the second U-shaped buckle 6 is convenient for fixing the return air pipe 1 and the heat exchange pipe 3, thereby avoiding the separation of the return air pipe 1 and the heat exchange pipe 3 during the later use.

[0035] Embodiment 2: Refer to Figures 1 - 10 , an evaporator return air pipe assembly, which is basically the same as Embodiment 1. Further: an inclined wall 64 is arranged on the mounting seat 62, a side wall 511 is arranged on the opposite surface of the clamping block 51 with respect to the wedge-shaped convex teeth 52, and the side wall 511 is adjacent to the inclined wall 64; when one end of the clamping block 51 is inserted into the clamping slot of the clamping ring 61, the side wall 511 of the clamping block 51 is attached to the inclined wall 64, causing the clamping block 51 to bend away from the inclined wall 64;

[0036] After the first U-shaped buckle 5 and the second U-shaped buckle 6 are inserted and connected, after the clamping block 51 enters the clamping slot of the clamping ring 61, one end will contact the inclined wall 64 of the mounting seat 62. Since the inclined wall 64 is inclined, one end of the clamping block 51 passing through the clamping ring 61 will bend, which makes the wedge-shaped convex teeth 52 firmly engage the clamping ring 61, making the connection between the first U-shaped buckle 5 and the second U-shaped buckle 6 more firm;

[0037] The end walls of the first U-shaped buckle 5 and the second U-shaped buckle 6 are both fixedly connected with elastic buckles 7, and the elastic buckles 7 are curved in an arc shape, and the elastic buckles 7 on the first U-shaped buckle 5 and the second U-shaped buckle 6 correspond to each other;

[0038] When the first U-shaped buckle 5 and the second U-shaped buckle 6 are connected, the elastic buckles 7 on the first U-shaped buckle 5 and the second U-shaped buckle 6 will conflict with each other, so that the first U-shaped buckle 5 and the second U-shaped buckle 6 form a force moving away from each other under the conflict of the elastic buckles 7, which makes the wedge-shaped convex teeth 52 on the clamping block 51 and the clamping ring 61 directly bite more tightly, further improving the clamping effect of the insulation sleeve 2, and further avoiding the separation of the return air pipe 1 and the heat exchange pipe 3.

[0039] The elastic buckle 7 is bent toward the inner side of the first U-shaped buckle 5 and the second U-shaped buckle 6;

[0040] This allows one end of the elastic buckle 7 to extend into the thermal insulation sleeve 2 when the elastic buckle 7 on the first U-shaped buckle 5 and the second U-shaped buckle 6 collide with each other, thereby enhancing the engagement with the thermal insulation sleeve 2 .

[0041] The utility model arranges the middle section of the return air pipe 1 into a spiral shape 10, arranges the heat exchange pipe 3 at the spiral shape 10 of the return air pipe 1, and welds the heat exchange pipe 3 to the return air pipe 1 tightly, which is conducive to the heat exchange pipe 3 to centrally exchange heat with the return air pipe 1, thereby facilitating the improvement of heat exchange efficiency; and the spiral shape 10 of the return air pipe 1 can also accelerate the cooling of the items to be cooled;

[0042] Furthermore, by buckling the first U-shaped buckle 5 and the second U-shaped buckle 6 on the heat preservation sleeve 2 sleeved on the return air pipe 1 and the heat exchange pipe 3, the heat preservation sleeve 2 is clamped, so that the return air pipe 1 and the heat exchange pipe 3 can be further close together, so as to avoid the return air pipe 1 and the heat exchange pipe 3 being separated due to cracking at the welding point between the return air pipe 1 and the heat exchange pipe 3 in the later stage, resulting in loose fitting, which causes the heat exchange efficiency to decrease, resulting in poor refrigeration effect;

[0043] When the first U-shaped buckle 5 and the second U-shaped buckle 6 are connected, the elastic buckles 7 on the first U-shaped buckle 5 and the second U-shaped buckle 6 will conflict with each other, so that the first U-shaped buckle 5 and the second U-shaped buckle 6 form a force moving away from each other under the conflict of the elastic buckles 7, which makes the wedge-shaped convex teeth 52 on the clamping block 51 and the clamping ring 61 directly bite more tightly, further improving the clamping effect of the insulation sleeve 2, and further avoiding the separation of the return air pipe 1 and the heat exchange pipe 3.

[0044] The above are only the preferred embodiments of the present utility model and do not impose any formal limitations on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications using the technical content prompted above to form equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An evaporator return air pipe assembly, characterized in that: include: A return air pipe (1) with a spiral shape (10) in the middle; The heat exchange tube (3) is closely attached to the spiral shape (10) of the return air tube (1), and the heat exchange tube (3) and the return air tube (1) are connected by welding; A heat-insulating sleeve (2) is sleeved on the return air pipe (1) and the heat exchange pipe (3) connected by welding; A capillary tube (4) is wound around the air return tube (1); A first U-shaped buckle (5) and a second U-shaped buckle (6) are sleeved on the thermal insulation sleeve (2); the first U-shaped buckle (5) and the second U-shaped buckle (6) are connected to each other; a mounting seat (62) is fixedly connected to the second U-shaped buckle (6); and a mounting hole (63) is provided on the mounting seat (62).

2. The evaporator return air pipe assembly according to claim 1, characterized in that: The number of the capillaries (4) is 2.

3. The evaporator return air pipe assembly according to claim 1, characterized in that: A clamping block (51) is symmetrically fixedly connected to the first U-shaped clamping buckle (5), and a wedge-shaped protruding tooth (52) is provided on the clamping block (51). A clamping ring (61) is symmetrically fixedly connected to the second U-shaped clamping buckle (6), and one end of the clamping block (51) is inserted into a clamping groove of the clamping ring (61).

4. The evaporator return air pipe assembly according to claim 3, characterized in that: The mounting seat (62) is provided with an inclined wall (64), and the clamping block (51) is provided with a side wall (511) on the surface opposite to the wedge-shaped protruding tooth (52), and the side wall (511) is adjacent to the inclined wall (64); When one end of the clamping block (51) is inserted into the clamping groove of the clamping ring (61), the side wall (511) of the clamping block (51) abuts against the inclined wall (64), so that the clamping block (51) is bent in a direction away from the inclined wall (64).

5. The evaporator return air pipe assembly according to claim 4, characterized in that: The end walls of the first U-shaped buckle (5) and the second U-shaped buckle (6) are both fixedly connected with elastic buckles (7), and the elastic buckles (7) are curved in an arc shape, and the elastic buckles (7) on the first U-shaped buckle (5) and the second U-shaped buckle (6) correspond to each other.

6. The evaporator return air pipe assembly according to claim 5, characterized in that: The elastic buckle (7) is bent toward the inner side of the first U-shaped buckle (5) and the second U-shaped buckle (6).