JP3601332B2 - Peltier module mounting structure and mounting method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mounting structure and a mounting method of a Peltier module constituting a Peltier unit.
[0002]
[Prior art]
FIG. 4 is a side view of the Peltier unit 17. The Peltier unit 17 is configured by sandwiching Peltier modules 18 and 19 between the base plates 3 and 3 of the heat sinks 1a and 1b. One heat sink 1a functions as a heat sink, and the other heat sink 1b functions as a radiator, thereby serving as a heat pump. Each of the heat sinks 1a and 1b is configured by arranging a plurality of plate fins 2 juxtaposed so as to face each other substantially vertically on a flat base plate 3.
[0003]
In the Peltier unit 17 as described above, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-125238, the heat sinks 1a and 1b are fastened by screws, and the Peltier modules 18 and 19 are sandwiched between the fastened heat sinks 1a and 1b. Is done. FIG. 5 is a transparent plan view showing a mounting structure of a conventional Peltier module in the Peltier unit 17. In this mounting structure, the screws 31, 32, 33, and 34 are tightened at four fastening points provided corresponding to the four sides of the Peltier module 18 to be sandwiched, thereby connecting the Peltier module 18 between the heat sinks 1a and 1b. To be pinched.
[0004]
[Problems to be solved by the invention]
In the Peltier unit 17 as described above, the closer the heat sinks 1a and 1b and the Peltier module 18 are in contact, the higher the heat conduction efficiency between them and the higher the heat exchange efficiency of the Peltier unit 17. In this sense, it is preferable that the screws 31,... Be tightened with as large a tightening force as possible. On the other hand, if the tightening force among the screws 31, 32, 33, 34 becomes unbalanced in the mounting structure, an eccentric load is applied to the Peltier module 18. FIG. 6 is a schematic side view showing a case where an unbalanced tightening force is generated between the screws facing each other across the Peltier module 18, such as the third screw 33 and the fourth screw 34. When an imbalance occurs in the tightening force of the screws 33 and 34 in this manner, the heat sink 1a is inclined as shown by a broken line A, and an eccentric load is applied to the Peltier module 18. In such a case, if the tightening force of each screw 31,... Is set to be large to improve the heat exchange efficiency of the Peltier unit 17, the Peltier module 18 having the silicon element sandwiched between the ceramic substrates will , Easily broken. Therefore, there is a problem that it is difficult to achieve both the improvement of the heat exchange efficiency of the Peltier unit 17 and the improvement of the reliability of the product in the conventional assembly structure.
[0005]
Further, in order to solve the above problem, there has been proposed an attachment method in which each screw is tightened a number of times little by little in the order of the first screw 31, the second screw 32, the third screw 33, and the fourth screw 34. . However, if such an attachment method is adopted, there is a problem that the number of work steps for assembling the Peltier unit 17 becomes extremely large.
[0006]
The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to sandwich a Peltier module between heat transfer members with a uniform surface pressure without increasing the number of work steps. It is an object of the present invention to provide a possible Peltier module mounting structure and mounting method.
[0007]
[Means for Solving the Problems]
Therefore, the assembly structure of the Peltier module according to the first aspect is the assembly structure of the Peltier module which is sandwiched between the two heat transfer members 1a and 1b fastened by screws and forms the Peltier unit 17. The Peltier module 18 is provided on one side and the sandwiching member 19 having a thickness substantially equal to that of the Peltier module 18 in the fastening direction is provided on one side thereof so as to face each other with the fastening portion therebetween. It is arranged so as to be sandwiched between the heat members 1a and 1b, and the second screw 12 is fastened at a position opposite to the first screw 11 with the Peltier module 18 therebetween, and the sandwiching member 19 is sandwiched. A third screw 13 is fastened at a position opposite to the first screw 11, and a tightening force of the first screw 11 is larger than a tightening force of the second screw 12 and the third screw 13 . Especially It is set to.
[0008]
In the assembly structure of the Peltier module of the first aspect, the Peltier module 18 and the sandwiching member 19 disposed on both sides of the first screw 11 restrict the heat transfer members 1a and 1b from being inclined and fastened. In addition, the surface pressure applied to the Peltier module 18 can be made uniform. Note that the sandwiching member 19 may be another Peltier module 19 itself or a dummy member having no such function. Further, by fastening the second screw 12 and the third screw 13, the heat transfer members 1a and 1b are reliably prevented from being inclined and fastened, and the surface pressure applied to the Peltier module 18 is made more uniform. It becomes possible. Furthermore, the fastening force by the screws 11, 12, 13 is evenly distributed to each part of the Peltier module 18 and the sandwiching member 19, so that the surface pressure applied to the Peltier module 18 is ensured to be uniform. It becomes possible.
[0012]
According to a second aspect of the present invention, the fastening force of the first screw 11 is about twice the fastening force of the second screw 12 and the third screw 13.
[0013]
In the assembly structure of the Peltier module according to the second aspect, the fastening force of the screws 11, 12, and 13 is equally distributed to each of the Peltier module 18 and the sandwiching member 19, and the surface applied to the Peltier module 18 is provided. It is possible to ensure that the pressure is uniform.
[0014]
The assembly structure of the Peltier module according to claim 3 is characterized in that the screw size of the first screw 11 is larger than the screw sizes of the second screw 12 and the third screw 13.
[0015]
In assembly structure of the Peltier module as claimed in claim 3, in the case of changing the clamping force as claimed in claim 3 or claim 4, without a large change in the tightening torque, axial force change caused by the magnitude change the thread size Thus, the tightening force can be changed. Therefore, problems such as loosening of the screw due to an excessively small torque and breakage of the screw due to an excessively large torque as in the case of changing the tightening torque can be avoided, and as a result, the reliability of the product is improved.
[0016]
The method of assembling a Peltier module according to claim 4 is the method of assembling a Peltier module sandwiched between two heat transfer members 1a and 1b fastened by screws to constitute a Peltier unit 17. The Peltier module 18 is provided on one side and the sandwiching member 19 having a thickness substantially equal to that of the Peltier module 18 in the fastening direction is provided on one side thereof so as to face each other with the fastening portion therebetween. It is arranged so as to be sandwiched between the heat members 1a and 1b, and a fastening point of the second screw 12 is provided at a position opposite to the fastening point of the first screw 11 with the Peltier module 18 interposed therebetween. A fastening point of the third screw 13 is provided at a position opposite to the fastening point of the first screw 11 with the sandwiching member 19 interposed therebetween, and the first screw 11 is first tightened, and then the third screw 13 is tightened. It is characterized in that fastening screws 12 or the third screw 13.
[0017]
The assembling method of the Peltier module of the claim 4, are first entered into the first screw 11 the fastening portion is provided at a position sandwiched between the Peltier module 18 and the sandwiched member 19. Therefore, even if the screws 11, 12, and 13 are fastened to the end at a stretch, the surface pressure applied to the Peltier module 18 can be made uniform.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, specific embodiments of an assembly structure and an assembly method of a Peltier module according to the present invention will be described in detail with reference to the drawings.
[0019]
FIG. 4 is a side view of the Peltier unit 17. The Peltier unit 17 includes a first Peltier module 18 and a second Peltier module 19 sandwiched between base plates 3 of heat sinks (heat transfer members) 1a and 1b. The two Peltier modules 18 and 19 have the same configuration in the form of a planar square, and have substantially the same thickness in the clamping direction by the heat sinks 1a and 1b. By energizing the Peltier modules 18 and 19 in a predetermined direction, one of the heat sinks 1a functions as a heat sink and the other heat sink 1b functions as a radiator, thereby serving as a heat pump. . Each of the heat sinks 1a and 1b is configured by arranging a plurality of plate fins 2 juxtaposed so as to face each other substantially vertically on a flat base plate 3.
[0020]
FIG. 1 is a transparent plan view showing the assembly structure of the Peltier module in the Peltier unit 17 as seen through the heat sink 1a. In this assembly structure, the first screw 11 is fastened between the first Peltier module 18 and the second Peltier module 19 to be sandwiched at substantially equal intervals from the two Peltier modules 18, 19. Then, the second screw 12 is fastened at a position facing the first screw 11 with the first Peltier module 18 interposed therebetween, and the third screw 13 is fastened at a position facing the first screw 11 with the second Peltier module 19 interposed therebetween. Is to be concluded. The distances between the screws 11, 12, 13 and the adjacent Peltier modules 18, 19 are substantially equal to each other.
[0021]
Next, a method of assembling the Peltier module will be described with reference to the schematic side view of FIG. The Peltier modules 18 and 19 are sandwiched between the heat sinks 1a and 1b by using a predetermined positioning member in advance. First, the first screw 11 is fastened to the end with a predetermined fastening torque (axial force). Then, the second screw 12 is tightened at a stretch to the end with a tightening torque (axial force) of about の of the first screw 11. Then, the third screw 13 is further tightened all at once with the same tightening torque as that of the second screw 12. As a result, the second screw 12 and the third screw 13 apply approximately １ ／ of the tightening force of the first screw 11 to the heat sinks 1a and 1b.
[0022]
If the above-mentioned Peltier module assembly structure in which the first screw 11 is fastened between the two Peltier modules 18 and 19 is used, the Peltier modules 18 and 19 themselves restrict the inclination of the heat sink 1a. Accordingly, the Peltier modules 18 and 19 can be brought into close contact with the base surfaces 3 of the heat sinks 1a and 1b with uniform surface pressure. Moreover, the second screw 12 and the third screw 13 are tightened at a position facing the first screw 11 with the Peltier modules 18 and 19 interposed therebetween. Accordingly, the surface pressure becomes more uniform. In this case, first, the first screw 11 existing between the two Peltier modules 18, 19 is fastened, and then the second screw 12 and the third screw 13 located on both sides are fastened. Therefore, it is possible to reliably avoid a situation in which the heat sink 1a is inclined during the tightening process of the screws 11, 12, and 13 and this is fixed as it is. Therefore, even if the screws 11, 12, 13 are tightened all at once until they reach the respective tightening torques, no imbalance occurs in the surface pressure. Therefore, the number of steps for assembling the Peltier unit 17 is not increased. Further, the tightening force of the first screw 11 that applies the tightening force to both the Peltier modules 18 and 19 is set to approximately twice the tightening force of the second screw 12 and the third screw 13. Therefore, the fastening force of each screw 11, 12, 13 is evenly distributed to each part of the Peltier modules 18, 19, whereby the surface pressure distribution becomes more uniform. In the above description, the first screw 11, the second screw 12, and the third screw 13 have the same screw size, and the tightening force is changed by changing the tightening torque. The screw size of the screw 11 may be made larger than the screw size of the second screw 12 and the third screw 13, and these may be tightened with substantially the same tightening torque, thereby changing the tightening force. In this way, problems such as loosening of the screw due to an excessively small torque and breakage of the screw due to an excessively large torque, as in the case of changing the tightening torque, can be avoided, thereby improving the reliability of the product.
[0023]
Although the specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be implemented with various modifications within the scope of the present invention. For example, since the Peltier unit 17 includes two Peltier modules 18 and 19, the second Peltier module 19 functions as a sandwiching member having an assembly structure. However, in the case of the Peltier unit 17 including only the first Peltier module 18, a dummy member having a thickness in the screw fastening direction substantially equal to that of the first Peltier module 18 can be used as the sandwiching member.
[0024]
Also, in the case of the Peltier unit 17 in which three or more Peltier modules 18,... Are sandwiched between the heat sinks 1a, 1b, the Peltier modules 18,. The assembly structure and the assembly method can be applied. In this case as well, a screw fastening portion is provided between the Peltier modules 18 and so on, and another screw fastening portion is provided at a position facing the fastening portion and the Peltier module 18 and so on. At the time of assembling, similarly, the screws to be fastened between the Peltier modules 18 are firstly fastened.
[0025]
Further, as a structure for assembling the single Peltier module 18, a structure as shown in FIG. 3 can be adopted. In this assembling structure, a fastening portion of the first screw 11 is provided at the center of the Peltier module 18, and the heat sinks 1a and 1b are fastened by one first screw 11 at the fastening portion. In this case, portions of the Peltier module 18 that face each other with the fastening portion of the first screw 11 interposed therebetween function as a Peltier module and a sandwiching member. Therefore, one Peltier module 18 can restrict the heat sinks 1a and 1b from being inclined and fastened, thereby preventing the surface pressure from being unbalanced.
[0026]
In the present specification, the thermoelectric semiconductor itself is called a Peltier element, and a structure in which the Peltier elements are arranged and sandwiched by ceramic plates from both sides thereof is called a Peltier module 18, and the Peltier module 18 and the heat sink 1a 1b is referred to as a Peltier unit 17.
[0027]
【The invention's effect】
In the Peltier module assembling structure of the first aspect, the Peltier module and the sandwiching member disposed on both sides of the first screw restrict the heat transfer member from being inclined and fastened. The obtained surface pressure distribution can be made uniform. Therefore, even if the fastening force by the screw is increased, it is possible to avoid the Peltier module from being damaged, thereby making it possible to achieve both improvement in the heat exchange efficiency of the Peltier unit and improvement in the reliability of the product. Further, by fastening the second screw and the third screw, it is possible to reliably prevent the heat transfer member from being inclined and fastened. Therefore, the distribution of the surface pressure applied to the Peltier module can be made more uniform. Furthermore, the fastening force of the screw can be evenly distributed to each part of the Peltier module and the sandwiching member. Therefore, the distribution of the surface pressure applied to the Peltier module can be made more uniform.
[0029]
Furthermore, in the assembly structure of the Peltier module according to the second aspect, the fastening force by the screw can be evenly distributed to each part of the Peltier module and the sandwiching member. Therefore, the distribution of the surface pressure applied to the Peltier module can be made more uniform.
[0030]
In the assembly structure of the Peltier module according to the third aspect, since the tightening force is changed by an axial force change due to a change in the screw size, the screw is not changed by an excessively small torque such as when the tightening torque is changed. Problems such as screw breakage due to loosening and excessive torque can be avoided, and as a result, the reliability of the product is improved.
[0031]
According to the method of assembling the Peltier module of the fourth aspect , even if each screw is fastened to the end, the screw can be fastened without tilting the heat transfer member. Therefore, it is possible to reliably avoid an increase in the number of work steps for assembling the Peltier unit.
[Brief description of the drawings]
FIG. 1 is a transparent plan view showing an assembly structure of a Peltier module according to an embodiment of the present invention.
FIG. 2 is a schematic side view showing the assembly structure.
FIG. 3 is a transparent plan view showing a modification of the assembly structure of the Peltier module.
FIG. 4 is a side view of a Peltier unit configured by using the above-mentioned Peltier module assembly structure.
FIG. 5 is a transparent plan view showing an assembly structure of a conventional Peltier module.
FIG. 6 is a schematic side view showing a Peltier unit configured by using a conventional Peltier module assembly structure.
[Explanation of symbols]
1a Heat sink 1b Heat sink 11 First screw 12 Second screw 13 Third screw 17 Peltier unit 18 First Peltier module 19 Second Peltier module

Claims (4)

In the assembly structure of the Peltier module which is sandwiched between the two heat transfer members (1a, 1b) fastened by screws and constitutes the Peltier unit (17), the first screw (11) is fastened relative to the fastening position. The Peltier module (18) is provided on one side, and the sandwiching member (19) having a thickness substantially equal to the Peltier module (18) in the fastening direction is provided on the other side. It is arranged so as to be sandwiched between the members (1a, 1b), and a second screw (12) is fastened at a position facing the first screw (11) with the Peltier module (18) interposed therebetween. A third screw (13) is fastened at a position opposite to the first screw (11) with the sandwiching member (19) interposed therebetween, and the tightening force of the first screw (11) is reduced by the second screw (12). ) And the tightening force of the third screw (13). Assembly structure of the Peltier module and wherein the are. 2. The Peltier module as claimed in claim 1 , wherein the tightening force of the first screw is approximately twice as large as the tightening force of the second screw and the third screw. Construction. The thread size of the first screw (11), a Peltier module according to claim 1 or claim 2, characterized in that it is larger than the screw size of the second screw (12) and the third thread (13) Assembly structure. In a method for assembling a Peltier module which is sandwiched between two heat transfer members (1a, 1b) fastened by screws and constitutes a Peltier unit (17), the first screw (11) is fastened relative to the fastening point. The Peltier module (18) on one side and the sandwiching member (19) having a thickness substantially equal to the Peltier module (18) in the fastening direction on the other side. The second screw (12) is disposed so as to be sandwiched between the members (1a, 1b), and the second screw (12) is located at a position facing the fastening position of the first screw (11) with the Peltier module (18) therebetween. A fastening point is provided, and a fastening point of the third screw (13) is provided at a position opposite to the fastening point of the first screw (11) with the sandwiching member (19) interposed therebetween. Tighten screw (11) , Then assembling method of the Peltier module, which comprises fastening a second screw (12) or the third screw (13).

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