Piezoelectric pump shell for seat comfort system and piezoelectric air pump

Abstract

The embodiment of the utility model relates to the technical field of piezoelectric air pumps, in particular to a piezoelectric pump shell used for a seat comfort system and a piezoelectric air pump, the piezoelectric pump shell comprises a shell body, the shell body is provided with a through hole and at least two containing grooves, the bottom of each containing groove is respectively provided with an air inlet hole and an air outlet hole, the through hole penetrates through the shell body along a first direction, and the through hole penetrates through the shell body along a second direction; at least one filling hole is further formed between the air inlet hole and the air outlet hole in the same containing groove, the air inlet hole, the air outlet hole and the filling hole are all formed in the second direction, the second direction is perpendicular to the first direction, and the air inlet hole, the air outlet hole and the filling hole are communicated with the through hole; and the filling part is accommodated in the filling hole, and the filling part is used for sealing and blocking the position, corresponding to the filling hole, in the through hole, so that a complete gas path is formed in the shell. The middle gas path channel is arranged in the piezoelectric pump shell, the shell can be manufactured through one-time injection molding and other integrated forming processes, then the filling part is arranged in the filling hole through the one-time forming process, and manufacturing of the piezoelectric pump shell can be completed.

Description

Technical Field

[0001] Embodiments of the present utility model relate to the field of piezoelectric pumps, and in particular to a piezoelectric pump housing and a piezoelectric pump for a seat comfort system. Background Art

[0002] A piezoelectric pump is a gas pump that uses a piezoelectric vibrator made of piezoelectric ceramics as a driving element. Traditional piezoelectric pumps can be single-chamber or designed with multiple chambers connected in series to increase flow rate or velocity; when designed with a series-parallel structure of multiple chambers, there needs to be an intermediate gas flow channel inside the housing to connect adjacent piezoelectric chambers. If both the upper and lower housings are single-layer designs, the part of the intermediate gas flow channel cannot be injection molded and requires 3D printing. The current 3D printing technology cannot guarantee accuracy and has a high cost; moreover, 3D printing has low production efficiency in large-scale production. Summary of the Utility Model

[0003] Embodiments of the present utility model provide a piezoelectric pump housing and a piezoelectric pump for a seat comfort system, aiming to solve the problem in the prior art that a piezoelectric pump housing with a single-layer design for both the upper and lower housings and having an intermediate gas flow channel cannot be formed by injection molding.

[0004] To solve the above technical problems, one technical solution adopted by the present utility model is: to provide a piezoelectric pump housing for a seat comfort system, including:

[0005] A housing having a through hole and at least two accommodation grooves, an air inlet hole and an air outlet hole are respectively opened at the bottom of each accommodation groove, the through hole penetrates the housing along a first direction, and at least one filling hole is further opened between the air inlet hole and the air outlet hole in the same accommodation groove. The air inlet hole, the air outlet hole, and the filling hole are all arranged along a second direction, the second direction is perpendicular to the first direction, and the air inlet hole, the air outlet hole, and the filling hole are respectively communicated with the through hole;

[0006] A filling part is received in the filling hole, and the filling part is used to seal and block the corresponding part of the through hole at the filling hole.

[0007] Optionally, the second direction is the thickness direction of the housing.

[0008] Optionally, the number of filling holes between the air inlet hole and the air outlet hole in the same accommodation groove is one, and the filling holes and the filling parts are arranged in one-to-one correspondence.

[0009] Optionally, the housing is an integrally formed structure.

[0010] Optionally, the housing is formed by injection molding.

[0011] Optionally, the filling portion is injection-molded in the filling hole.

[0012] Another technical solution adopted by the present utility model is: to provide a piezoelectric air pump for a seat comfort system, comprising:

[0013] Piezoelectric vibrators;

[0014] Two of the above-mentioned piezoelectric pump housings, the two housings are stacked so that every two facing accommodation grooves are butted to form a piezoelectric cavity, and the piezoelectric vibrators are arranged in each piezoelectric cavity, and each piezoelectric cavity is correspondingly provided with the air inlet hole and the air outlet hole; the air outlet hole of one piezoelectric cavity is communicated with the air inlet hole of the adjacent other piezoelectric cavity, and a check valve is arranged in the air outlet hole.

[0015] Optionally, the piezoelectric vibrator divides the piezoelectric cavity into two non-communicating sub-cavities. Among them, between two adjacent piezoelectric cavities, the air outlet hole of one sub-cavity is communicated with the air inlet hole of the adjacent other sub-cavity through the through hole.

[0016] Optionally, both ends of the housing further have an air inlet joint and an exhaust joint, and the air inlet joint is communicated with one end of the through hole, and the exhaust joint is communicated with the other end of the through hole.

[0017] Optionally, the piezoelectric vibrator includes a flexible circuit board, a piezoelectric ceramic and a metal sheet; a first seal and a second seal are arranged in the piezoelectric cavity, the piezoelectric ceramic and the metal sheet are respectively arranged at both ends of the flexible circuit board; the first seal and the second seal are respectively located at opposite ends of the flexible circuit board, and the first seal and the second seal jointly clamp the edge of the flexible circuit board; the two housings are respectively crimped on both sides of the first seal and the second seal facing away from each other.

[0018] The beneficial effects of the embodiments of the present utility model are as follows: Different from the prior art, the piezoelectric pump housing in the present utility model includes a housing and a filling part. Along the first direction, the housing is provided with a through hole that penetrates the housing along the first direction. A receiving groove is also provided at a preset position of the housing. An air inlet hole and an air outlet hole are respectively provided at the bottom of the receiving groove. The air inlet hole and the air outlet hole are arranged at intervals, and both the air inlet hole and the air outlet hole are arranged along the second direction, and the second direction is perpendicular to the first direction. At least one filling hole is also formed between the air inlet hole and the air outlet hole located in the same receiving groove. The filling hole is arranged along the second direction, and the filling hole, the air inlet hole, and the air outlet hole are respectively communicated with the through hole. The filling part is received in the filling hole, and the filling part is used to seal and block the corresponding position of the through hole at the filling hole, so as to form a complete air path in the housing. In the present application, an intermediate air path channel is provided inside the piezoelectric pump housing, but the housing can be manufactured through an integral forming process such as one-time injection molding, and then the filling part is arranged in the filling hole through a one-time forming process, and the manufacturing of the piezoelectric pump housing can be completed without 3D printing, with higher production efficiency and cost savings in manufacturing. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual ratio.

[0020] Figure 1 is a schematic structural diagram of a piezoelectric pump housing for a seat comfort system in an embodiment of the present utility model;

[0021] Figure 2 is a cross-sectional view of a piezoelectric pump housing for a seat comfort system in an embodiment of the present utility model;

[0022] Figure 3 is a schematic structural diagram of a piezoelectric pump for a seat comfort system in an embodiment of the present utility model;

[0023] Figure 4 is a cross-sectional view of a piezoelectric pump for a seat comfort system in an embodiment of the present utility model;

[0024] Figure 5 is Figure 4 an enlarged schematic view of part A in

[0025] Figure 6 is an exploded schematic diagram of a piezoelectric pump for a seat comfort system in an embodiment of the present utility model.

[0026] Description of the Reference Numerals:

[0027] 100, piezoelectric pump housing; 1, housing; 11, through hole; 12, receiving groove; 13, intake hole; 14, outlet hole; 15, filling hole; 2, filling part; 200, piezoelectric vibrator; 2001, flexible circuit board; 2002, piezoelectric ceramic; 2003, metal sheet; 300, piezoelectric cavity; 3001, sub-cavity; 400, intake joint; 500, exhaust joint; 600, first seal; 700, second seal; 1000, piezoelectric air pump. Detailed implementation manners

[0028] For the convenience of understanding the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in this specification in the description of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0030] Please refer to Figure 1 , the present invention provides a piezoelectric pump housing 100 for a seat comfort system. The piezoelectric pump housing 100 includes a housing 1 and a filling part 2. Among them, the housing 1 is the main part of the piezoelectric pump housing 100, and the filling part 2 is arranged in the housing 1 to form a complete gas path in the housing 1.

[0031] Please refer to Figure 2 , for the convenience of description, the direction shown by the X-axis in Figure 2 is now taken as the first direction, Figure 2The direction shown by the Y-axis in [description] is the second direction. The housing 1 is generally block-shaped. Along the first direction, the housing 1 is provided with a through hole 11, and the through hole 11 penetrates the housing 1 along the first direction. Two accommodation grooves 12 are also provided at a preset position of the housing 1. An air inlet hole 13 and an air outlet hole 14 are respectively provided at the bottom of each accommodation groove 12. The air inlet hole 13 and the air outlet hole 14 are arranged at intervals, and both the air inlet hole 13 and the air outlet hole 14 are arranged along the second direction, and the second direction is perpendicular to the first direction. At least one filling hole 15 is also formed between the air inlet hole 13 and the air outlet hole 14 located in the same accommodation groove 12. The filling hole 15 is arranged along the second direction, and the filling hole 15, the air inlet hole 13, and the air outlet hole 14 are respectively communicated with the through hole 11.

[0032] The filling part 2 is generally cylindrical, and the filling part 2 is received in the filling hole 15. The filling part 2 is used to seal and block the corresponding position of the through hole 11 at the filling hole 15, so that the air path at the position of the filling part 2 in the through hole 11 is separated, and the part between adjacent two filling parts in the through hole 11 forms an intermediate air flow channel. The housing 1 of the piezoelectric pump housing 100 proposed in this application can be manufactured through a single one-piece forming process, and then the filling part 2 is arranged in the filling hole 15 through a single forming process, and the manufacturing of the piezoelectric pump housing 100 can be completed.

[0033] Please refer to Figure 2 , in some embodiments, the second direction is the thickness direction of the housing 1 to facilitate the formation of the air inlet hole 13, the air outlet hole 14, and the filling hole 15.

[0034] Please refer to Figure 2 , in some embodiments, the number of filling holes 15 between the air inlet hole 13 and the air outlet hole 14 located in the same accommodation groove 12 is one to reduce the production process.

[0035] In some embodiments, the housing 1 is a one-piece forming structure, that is, the housing 1 can be formed through a single processing. The processes for producing the housing 1 include but are not limited to injection molding, 3D printing, and metal powder laser one-piece forming.

[0036] In a specific embodiment, the housing 1 is formed by injection molding, and injection molding has the advantages of high efficiency and high precision.

[0037] In some embodiments, the filling part 2 is injection molded in the filling hole 15. In a specific embodiment, the piezoelectric pump housing 100 proposed in this application can be injection molded twice. Specifically, the housing 1 is formed by the first injection molding, and the filling part 2 is injection molded into the filling hole 15 by the second injection molding.

[0038] In summary, the piezoelectric pump housing 100 includes a housing 1 and a filling portion 2. Along a first direction, the housing 1 is provided with a through hole 11 which penetrates the housing 1 along the first direction. A receiving groove 12 is further provided at a preset position of the housing 1. An air inlet hole 13 and an air outlet hole 14 are respectively provided at the bottom of the receiving groove 12. The air inlet hole 13 and the air outlet hole 14 are arranged at intervals, and both the air inlet hole 13 and the air outlet hole 14 are arranged along a second direction which is perpendicular to the first direction. At least one filling hole 15 is further formed between the air inlet hole 13 and the air outlet hole 14 located in the same receiving groove 12. The filling hole 15 is arranged along the second direction, and the filling hole 15, the air inlet hole 13 and the air outlet hole 14 are respectively communicated with the through hole 11. The filling portion 2 is received in the filling hole 15, and the filling portion 2 is used for sealing and blocking the corresponding position of the through hole 11 at the filling hole 15, so as to form a complete air path in the housing 1. In the present application, an intermediate air path channel is provided inside the piezoelectric pump housing 100, but the housing 1 can be manufactured through an integral forming process such as one-time injection molding, and then the filling portion 2 is arranged in the filling hole 15 through a one-time forming process, so as to complete the manufacture of the piezoelectric pump housing 100 without 3D printing, with higher production efficiency and cost savings.

[0039] The present utility model further provides a piezoelectric pump 1000 for a seat comfort system. Please refer to Figure 3 and Figure 4 , the piezoelectric pump 1000 includes a piezoelectric vibrator 200 and two of the above-mentioned piezoelectric pump housings 100. The housing 1 of one piezoelectric pump housing 100 is stacked with the housing 1 of another piezoelectric pump housing 100, so that two opposite receiving grooves 12 are butted to form a piezoelectric cavity 300. At least two piezoelectric cavities 300 are provided, and the piezoelectric cavities 300 are arranged at intervals and communicate with each other in sequence. A piezoelectric vibrator 200 is provided in each piezoelectric cavity 300, and the piezoelectric vibrator 200 is a driving unit of the piezoelectric pump 1000. An air inlet hole 13 and an air outlet hole 14 as described above are respectively provided corresponding to each piezoelectric cavity 300. The air outlet hole 14 of one piezoelectric cavity 300 is communicated with the air inlet hole 13 of an adjacent another piezoelectric cavity 300 through an intermediate air flow channel, so that the air discharged from one piezoelectric cavity 300 can enter the next piezoelectric cavity 300, and the air flow flowing out of the last piezoelectric cavity 300 is the air flow output by the piezoelectric pump 1000. Check valves are provided at all the air outlet holes.

[0040] Please refer to Figure 4 and Figure 5 , Figure 5 is Figure 4An enlarged schematic view of part A. The piezoelectric vibrator 200 divides the piezoelectric cavity 300 into two non - communicating sub - cavities 3001. Between any two adjacent piezoelectric cavities 300, the air outlet 14 of the sub - cavity 3001 of one piezoelectric cavity 300 is communicated with one end of the through - hole 11, and the air inlet 13 of the sub - cavity 3001 of the other piezoelectric cavity 300 is communicated with the other end of the through - hole 11, so as to realize the connection of any two adjacent piezoelectric cavities 300 through the through - hole 11.

[0041] Please refer to Figure 4 and Figure 5 , the piezoelectric vibrator 200 includes a flexible circuit board 2001, a piezoelectric ceramic 2002 and a metal sheet 2003. The flexible circuit board 2001 is generally sheet - shaped. The flexible circuit board 2001 (Flexible Printed Circuit, abbreviated as FPC) is a printed circuit board made of polyimide or polyester film as the substrate, which has high reliability and good flexibility. It has the characteristics of high wiring density, light weight, thin thickness and good bendability. The piezoelectric ceramic 2002 is generally circular - sheet - shaped and the metal sheet 2003 is generally sheet - shaped. The material of the metal sheet 2003 includes but is not limited to copper, iron, aluminum or alloy. The piezoelectric ceramic 2002 and the metal sheet 2003 are respectively arranged at both ends in the thickness direction of the flexible circuit board 2001.

[0042] Please refer to Figure 4 and Figure 6 , the piezoelectric cavity 300 is also provided with a first seal 600 and a second seal 700. The first seal 600 and the second seal 700 are respectively located at opposite ends of the flexible circuit board 2001. The first seal 600 and the second seal 700 jointly clamp the edge of the flexible circuit board 2001 to seal and separate the two sub - cavities 3001 of the same piezoelectric cavity 300, which can reduce the leakage between the two sub - cavities 3001. The two shells 1 are respectively crimped on the opposite sides of the first seal 600 and the second seal 700 to fix the first seal 600 and the second seal 700. The specific forms of the first seal 600 and the second seal 700 include but are not limited to sealing rings and sealing strips.

[0043] Please refer to Figure 3 and Figure 4 , in the piezoelectric air pump 1000, at both ends of the shell 1, there are also an air inlet joint 400 and an exhaust joint 500 respectively. The air inlet joint 400 is communicated with one end of the through - hole 11, and the exhaust joint 500 is communicated with the other end of the through - hole 11. The air inlet joint 400 and the exhaust joint 500 are structures that extend the through - hole 11 axially to the outside. Actually, they are integrally formed with the shell 1, and the setting of the air inlet joint 400 and the exhaust joint 500 can facilitate the quick connection of the piezoelectric air pump 1000 with the external air pipe.

[0044] It should be noted that the description and drawings of the present utility model provide preferred embodiments of the present utility model. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations to the content of the present utility model. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Moreover, the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the description of the present utility model. Further, for those of ordinary skill in the art, improvements or modifications can be made based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A piezoelectric pump housing for a seat comfort system, characterized in that: include: A shell having a through hole and at least two containing grooves, wherein an air inlet hole and an air outlet hole are respectively provided at the bottom of each of the containing grooves, wherein the through hole penetrates the shell along a first direction, and at least one filling hole is further provided between the air inlet hole and the air outlet hole in the same containing groove, wherein the air inlet hole, the air outlet hole and the filling hole are all arranged along a second direction, wherein the second direction is perpendicular to the first direction, and wherein the air inlet hole, the air outlet hole and the filling hole are respectively connected to the through hole; A filling portion is received in the filling hole, and is used to seal and block a portion of the through hole corresponding to the filling hole.

2. The piezoelectric pump housing for a seat comfort system according to claim 1, characterized in that: The second direction is a thickness direction of the shell.

3. The piezoelectric pump housing for a seat comfort system according to claim 1, characterized in that: The number of the filling hole between the air inlet hole and the air outlet hole in the same accommodating groove is one, and the filling hole is arranged in a one-to-one correspondence with the filling part.

4. The piezoelectric pump housing for a seat comfort system according to any one of claims 1 to 3, characterized in that: The shell is an integrally formed structure.

5. The piezoelectric pump housing for a seat comfort system according to claim 4, characterized in that: The housing is injection molded.

6. The piezoelectric pump housing for a seat comfort system according to any one of claims 1 to 3, characterized in that: The filling portion is formed in the filling hole by injection molding.

7. A piezoelectric pump for a seat comfort system, characterized in that: include: Piezoelectric vibrator; Two piezoelectric pump housings as described in any one of claims 1 to 6, the two housings are stacked so that every two facing accommodating grooves are connected to form a piezoelectric cavity, each piezoelectric cavity is provided with the piezoelectric vibrator, and each piezoelectric cavity is correspondingly provided with the air inlet and the air outlet; the air outlet of one piezoelectric cavity is connected to the air inlet of another adjacent piezoelectric cavity, and a one-way valve is provided in each of the air outlets.

8. The piezoelectric pump for a seat comfort system according to claim 7, characterized in that: The piezoelectric vibrator divides the piezoelectric cavity into two sub-cavities that are not connected to each other, wherein between two adjacent piezoelectric cavities, the air outlet of one sub-cavity is connected to the air inlet of another adjacent sub-cavity through the through hole.

9. The piezoelectric pump for a seat comfort system according to claim 7 or 8, characterized in that: The two ends of the shell are respectively provided with an air inlet joint and an air outlet joint, the air inlet joint is communicated with one end of the through hole, and the air outlet joint is communicated with the other end of the through hole.

10. The piezoelectric pump for a seat comfort system according to claim 7 or 8, characterized in that: The piezoelectric vibrator includes a flexible circuit board, a piezoelectric ceramic and a metal sheet; a first seal and a second seal are provided in the piezoelectric cavity, and the piezoelectric ceramic and the metal sheet are respectively arranged at two ends of the flexible circuit board; the first seal and the second seal are respectively located at opposite ends of the flexible circuit board, and the first seal and the second seal jointly clamp the edge of the flexible circuit board; the two shells are respectively crimped on the opposite sides of the first seal and the second seal.

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