An evaporator inner shell and an evaporator
By setting parallel and connecting grooves on the outer wall of the evaporator inner shell and manufacturing the flow guiding grooves using mechanical stamping technology, the problem of low forming precision of the inner shell is solved, achieving low-cost and high-efficiency refrigerant flow and heat exchange effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN QIXIN ELECTRIC APPLIANCE CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-23
AI Technical Summary
The existing evaporator inner shell is difficult to manufacture using mechanical stamping, resulting in low molding precision. The inner shell and outer shell are difficult to fit together completely, affecting the refrigerant flow and heat exchange efficiency. In addition, the cost of the internal high-pressure molding equipment is high.
The inner shell body is designed with multiple parallel grooves and connecting grooves on its outer wall to form a continuous flow guiding groove. It is manufactured using mechanical stamping process to ensure that the inner shell and outer shell fit tightly together, and an interference fit is used to form a flow guiding channel.
The flow guide grooves manufactured by mechanical stamping process have high precision, which reduces manufacturing costs, improves the fit between the inner shell and the outer shell and the heat exchange efficiency, and ensures uniform flow of refrigerant.
Smart Images
Figure CN224398055U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of evaporator technology, and in particular to an evaporator inner shell and an evaporator. Background Technology
[0002] Previously, evaporators used copper tubing for the refrigerant passage, but copper tubing was expensive. Therefore, evaporators with an inner and outer shell combined to form the refrigerant passage have emerged. Both the inner and outer shells are made of stamped steel, making them less expensive than copper tubing. Existing evaporators typically have a spiral groove in the inner shell, which, when assembled with the outer shell, forms the refrigerant passage within which the refrigerant flows. However, creating the spiral groove requires continuous deformation of the material in three-dimensional space, while mechanical stamping is essentially two-dimensional planar deformation, making it difficult to directly create a spiral feature. Therefore, existing spiral grooves are generally manufactured using an internal high-pressure forming process. During internal high-pressure forming, defects such as varying thickness or material flaws in the inner shell blank can easily occur, leading to minor undulations or deformations during forming. This makes it difficult for the inner and outer shells to fit completely together during assembly, creating gaps. These gaps affect the refrigerant flow, resulting in uneven refrigerant flow and reduced heat exchange efficiency. Furthermore, the operating and maintenance costs of internal high-pressure forming equipment are high, making it difficult to reduce the cost of this type of evaporator. If the structure of the evaporator's inner shell can be improved so that it can be manufactured using a mechanical stamping process, the cost of the evaporator can be further reduced. Utility Model Content
[0003] The purpose of this utility model is to provide an evaporator inner shell and an evaporator, aiming to solve the problem that the inner shell of the evaporator in the prior art cannot be made by mechanical stamping process.
[0004] To achieve the above objectives, this utility model provides an evaporator inner shell, which includes a cylindrical inner shell body. The outer wall of the inner shell body is provided with multiple parallel grooves that are parallel to each other. The parallel grooves are parallel to the top and bottom ends of the inner shell body. Each parallel groove has a break, which makes the parallel groove a non-circular annular groove. The two ends of each parallel groove are a first connecting end and a second connecting end, respectively. Between two adjacent parallel grooves, the second connecting end of one parallel groove is connected to the first connecting end of another parallel groove through a connecting groove. The adjacent connecting grooves are parallel to each other. The multiple parallel grooves and multiple connecting grooves form a single and continuously connected flow guiding groove on the outer wall of the inner shell body.
[0005] Furthermore, a first through hole is provided at the first connecting end of the parallel groove near the top of the inner shell body, and a second through hole is provided at the second connecting end of the parallel groove near the bottom of the inner shell body.
[0006] Furthermore, the included angle ∠1 formed between the connecting groove and the parallel groove is 30°-40°.
[0007] Furthermore, the included angle ∠1 formed between the connecting groove and the parallel groove is 34°.
[0008] Furthermore, the depth D1 of the flow guide groove is 2mm-3mm, and the width W1 of the flow guide groove is 10mm-15mm.
[0009] Furthermore, the depth D1 of the flow guide groove is 2.5 mm, and the width W1 of the flow guide groove is 12 mm.
[0010] Furthermore, the outer diameter of the inner shell body The inner shell body has a length of 85mm-90mm, and the inner shell body length L1 is 145mm-150mm.
[0011] Furthermore, the outer diameter of the inner shell body The length of the inner shell is 88mm, and the length L1 of the inner shell body is 148mm.
[0012] Furthermore, the inner shell is made of metal.
[0013] This utility model also provides an evaporator, which includes an outer shell, a bottom shell, and an evaporator inner shell as described above. The bottom shell is disposed at the bottom of the outer shell, and the inner shell body is disposed inside the outer shell. The outer wall of the inner shell body and the inner wall of the outer shell are interference-fitted, and a flow channel is formed between the flow guide groove of the inner shell body and the outer shell.
[0014] The evaporator inner shell and evaporator provided by this utility model, compared with the prior art, do not have threaded structures in the parallel groove and connecting groove. Both the parallel groove and the connecting groove can be made by mechanical stamping process, so that all the structures of the flow guiding groove can be manufactured by mechanical stamping process, resulting in low manufacturing cost. Moreover, the structure obtained by mechanical stamping process has high dimensional accuracy, which can ensure the stability of the cross-sectional shape of the flow guiding groove, avoiding the problem of low precision in high-pressure forming in the prior art, realizing high-precision forming, significantly improving the fit, and ensuring the tight fit between the inner shell body and the outer shell. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the evaporator's inner shell;
[0016] Figure 2 This is a cross-sectional view of the evaporator's inner shell;
[0017] Figure 3 This is a three-dimensional structural diagram of the evaporator;
[0018] Figure 4 This is a cross-sectional view of the evaporator.
[0019] Explanation of reference numerals in the attached figures:
[0020] 1. Inner shell body; 11. Parallel groove; 111. First connecting end; 112. Second connecting end; 113. First through hole; 114. Second through hole; 12. Connecting groove; 13. Flow guiding groove; 2. Outer shell; 3. Bottom shell; 4. Flow guiding channel; Detailed Implementation
[0021] The present invention will be described in detail below with reference to specific embodiments.
[0022] In this utility model, unless otherwise explicitly specified and limited, when terms such as "set in," "connected," or "linked" appear, these terms should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through one or more intermediate media. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The directional terms appearing in this utility model are for the purpose of better describing the characteristics of the features and the relationships between them. It should be understood that when the placement direction of this utility model changes, the direction of the characteristics of the features and the relationships between them also changes accordingly. Therefore, directional terms do not constitute an absolute limitation on the characteristics of the features and the relationships between them in space, but only a relative limitation.
[0023] This utility model provides an evaporator inner shell and an evaporator, such as Figures 1 to 4 As shown, it includes a cylindrical inner shell body 1. The outer wall of the inner shell body 1 is provided with multiple parallel grooves 11. The parallel grooves 11 are parallel to the top and bottom ends of the inner shell body 1. Each parallel groove 11 has a break, making it a non-circular annular groove. The two ends of each parallel groove 11 are a first connecting end 111 and a second connecting end 112, respectively. Between two adjacent parallel grooves 11, the second connecting end 112 of one parallel groove 11 is connected to the first connecting end 111 of another parallel groove 11 via a connecting groove 12. Adjacent connecting grooves 12 are parallel to each other. The multiple parallel grooves 11 and multiple connecting grooves 12 form a single, continuously connected flow-guiding groove 13 on the outer wall of the inner shell body 1. Specifically, the connecting groove 12 is preferably as follows: Figure 1 The oblique groove shown can be any other shape, such as a bent or curved groove, as long as it can connect the first connecting end 111 of the parallel groove 11 to the second connecting end 112 of the adjacent parallel groove 11.
[0024] Based on the above structural configuration, the parallel groove 11 and the connecting groove 12 are not threaded structures. Both the parallel groove 11 and the connecting groove 12 can be manufactured by mechanical stamping, so that all structures of the formed flow guide groove 13 can be manufactured by mechanical stamping, resulting in low manufacturing cost. Moreover, the structure obtained by mechanical stamping has high dimensional accuracy, which can ensure the stability of the cross-sectional shape of the flow guide groove 13, avoiding the problem of low precision in internal high-pressure forming as in the prior art, achieving high-precision forming, significantly improving fit, and ensuring a tight fit between the inner shell body 1 and the outer shell 2.
[0025] In this invention, a first through hole 113 is provided at the first connecting end 111 of the parallel groove 11 near the top of the inner shell body 1. The first through hole 113 serves as the inlet for the refrigerant to enter the evaporator and connects to an external pipeline to ensure that the refrigerant is evenly distributed to the guide groove 13. A second through hole 114 is provided at the second connecting end 112 of the parallel groove 11 near the bottom of the inner shell body 1. The second through hole 114 serves as the outlet for the refrigerant and connects to the compressor to complete the circulation. Of course, it is also possible for the first through hole 113 to serve as the outlet for the refrigerant and the second through hole 114 to serve as the inlet for the refrigerant to enter the evaporator.
[0026] In this invention, the included angle ∠1 formed between the connecting groove 12 and the parallel groove 11 is 30°-40°, and more preferably, the included angle ∠1 formed between the connecting groove 12 and the parallel groove 11 is 34°. The aforementioned inclination angle of the connecting groove 12 has a relatively small impact on the flow of the refrigerant.
[0027] In this invention, the depth D1 of the flow guiding groove 13 is 2mm-3mm, more preferably 2.5mm, and the width W1 is 10mm-15mm, more preferably 12mm. By setting the depth and width of the flow guiding groove 13 as described above, the heat exchange area is maximized, resulting in better heat exchange performance, further improving overall heat exchange efficiency, and ensuring smooth flow of the refrigerant.
[0028] In this utility model, the outer diameter of the inner shell body 1 The outer diameter is 85mm-90mm, and more preferably, the outer diameter of the inner shell body 1 is... The length L1 of the inner shell body 1 is 145mm-150mm, and more preferably, the length L1 of the inner shell body 1 is 148mm.
[0029] In this utility model, the inner shell body 1 is made of metal, which has good thermal conductivity and can improve the cooling performance. It is preferably made of steel plate, but it can also be made of other heat-conducting materials with good thermal conductivity.
[0030] This utility model also provides an evaporator, which includes an outer shell 2, a bottom shell 3, and an inner shell as described above. The bottom shell 3 is disposed at the bottom of the outer shell 2, and the inner shell body 1 is disposed inside the outer shell 2. The outer wall of the inner shell body 1 and the inner wall of the outer shell 2 are press-fitted. A flow channel 4 is formed between the flow-guiding groove 13 of the inner shell body 1 and the outer shell 2. The refrigerant enters the flow channel 4 through the first through hole 113 and finally flows out through the second through hole 114, thus realizing the function of the evaporator.
[0031] In summary, this type of evaporator inner shell and evaporator can solve the problem that the inner shell of the evaporator in the prior art cannot be manufactured by mechanical stamping process.
[0032] Where there is no conflict, the above embodiments and features can be combined with each other.
[0033] 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 the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. An evaporator inner shell, characterized in that: The inner shell body (1) is cylindrical. The outer wall of the inner shell body (1) is provided with multiple parallel grooves (11) that are parallel to each other. The parallel grooves (11) are parallel to the top and bottom ends of the inner shell body (1). Each parallel groove (11) is provided with a break. The break makes the parallel groove (11) a non-circular annular groove. The two ends of each parallel groove (11) are a first connecting end (111) and a second connecting end (112), respectively. Between two adjacent parallel grooves (11), the second connecting end (112) of one parallel groove (11) is connected to the first connecting end (111) of another parallel groove (11) through a connecting groove (12). The adjacent connecting grooves (12) are parallel to each other. The multiple parallel grooves (11) and multiple connecting grooves (12) form a single and continuously connected flow guide groove (13) on the outer wall of the inner shell body (1).
2. The evaporator inner shell according to claim 1, characterized in that: A first through hole (113) is provided at the first connecting end (111) of the parallel groove (11) near the top of the inner shell body (1), and a second through hole (114) is provided at the second connecting end (112) of the parallel groove (11) near the bottom of the inner shell body (1).
3. The evaporator inner shell according to claim 1, characterized in that: The included angle ∠1 formed between the connecting groove (12) and the parallel groove (11) is 30°-40°.
4. The evaporator inner shell according to claim 3, characterized in that: The included angle ∠1 formed between the connecting groove (12) and the parallel groove (11) is 34°.
5. The evaporator inner shell according to claim 1, characterized in that: The depth D1 of the flow guide groove (13) is 2mm-3mm, and the width W1 of the flow guide groove (13) is 10mm-15mm.
6. The evaporator inner shell according to claim 5, characterized in that: The depth D1 of the flow guide groove (13) is 2.5 mm, and the width W1 of the flow guide groove (13) is 12 mm.
7. The evaporator inner shell according to claim 1, characterized in that: Outer diameter of the inner shell body (1) The length of the inner shell body (1) is 85mm-90mm, and the length L1 is 145mm-150mm.
8. The evaporator inner shell according to claim 7, characterized in that: Outer diameter of the inner shell body (1) The length of the inner shell body (1) is 88mm, and the length L1 of the inner shell body (1) is 148mm.
9. The evaporator inner shell according to claim 1, characterized in that: The inner shell body (1) is made of metal.
10. An evaporator, characterized in that: It includes an outer shell (2), a bottom shell (3) and an evaporator inner shell as described in any one of claims 1 to 9. The bottom shell (3) is disposed at the bottom of the outer shell (2), the inner shell body (1) is disposed inside the outer shell (2), and the outer wall of the inner shell body (1) and the inner wall of the outer shell (2) are interference fit. A flow channel (4) is formed between the flow guide groove (13) of the inner shell body (1) and the outer shell (2).