A segmented thermoelectric cooling module and device

Abstract

The present invention discloses a segmented thermoelectric cooling module, comprising an upper electrode, a lower electrode, and thermoelectric elements disposed between the upper and lower electrodes. The thermoelectric elements comprise segmented P-type and N-type thermoelectric elements, each comprising at least two segments of P-type thermoelectric units and at least two segments of N-type thermoelectric units, respectively. By segmenting the thermoelectric elements in the thermoelectric cooling module to form a non-uniform thermoelectric material, the present invention improves the module's cooling performance.

Description

Technical Field

[0001] The present invention relates to the technical field of thermoelectric cooling devices, and in particular to a thermoelectric cooling module and device with segmented thermoelectric elements. Background Art

[0002] In recent years, environmental pollution and energy shortages have been a persistent social problem, significantly impacting sustainable economic development. Among new energy conversion technologies, thermoelectric conversion technology enables the mutual conversion of heat and electricity, allowing energy consumed in daily life to be reused.

[0003] In industrial environments, traditional cooling methods like water and air cooling have reached their limits. Thermoelectric cooling, however, has attracted considerable research attention due to its advantages, including small size, lack of moving parts, and low noise. However, the small temperature difference produced by thermoelectric cooling technology and its low cooling efficiency limit its widespread industrial application. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention proposes a segmented thermoelectric cooling module and device, which designs the thermoelectric elements into segments to form uneven thermoelectric materials, so as to improve the performance of the thermoelectric cooling module and the thermoelectric cooling module.

[0005] To achieve the above-mentioned objectives, the present invention proposes a segmented thermoelectric cooling module, comprising an upper electrode, a lower electrode, and a thermoelectric element arranged between the upper electrode and the lower electrode; the thermoelectric element comprises a segmented P-type thermoelectric element and an N-type thermoelectric element, wherein the P-type thermoelectric element and the N-type thermoelectric element respectively comprise at least two segments of P-type thermoelectric units and at least two segments of N-type thermoelectric units.

[0006] Furthermore, the P-type thermoelectric unit close to the upper electrode in the P-type thermoelectric element forms a P-type cold end, and the P-type thermoelectric unit close to the lower electrode forms a P-type hot end; the N-type thermoelectric unit close to the upper electrode in the N-type thermoelectric element forms an N-type cold end, and the N-type thermoelectric unit close to the lower electrode forms an N-type hot end;

[0007] Among them, the resistivity of the P-type hot end is greater than the resistivity of the P-type cold end, and the resistivity of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end decreases uniformly from the P-type hot end to the P-type cold end; the resistivity of the N-type hot end is greater than the resistivity of the N-type cold end, and the resistivity of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end decreases uniformly from the N-type hot end to the N-type cold end.

[0008] Furthermore, the thermal conductivity of the P-type hot end is greater than the thermal conductivity of the P-type cold end, and the thermal conductivity of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end decreases uniformly from the P-type hot end to the P-type cold end;

[0009] The thermal conductivity of the N-type hot end is greater than that of the N-type cold end, and the thermal conductivity of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end decreases uniformly from the N-type hot end to the N-type cold end.

[0010] Furthermore, the Seebeck coefficient of the P-type hot end is greater than the Seebeck coefficient of the P-type cold end, and the absolute value of the Seebeck coefficient of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end decreases uniformly from the P-type hot end to the P-type cold end;

[0011] The Seebeck coefficient of the N-type hot end is smaller than the Seebeck coefficient of the N-type cold end, and the absolute value of the Seebeck coefficient of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end decreases uniformly from the N-type hot end to the N-type cold end.

[0012] Furthermore, the resistivity calculation formula of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end is:

[0013]

[0014] Where, ρ Ph Indicates the P-type hot end resistivity, ρ Pc represents the P-type cold end resistivity, M represents that the P-type thermoelectric element contains M segments of thermoelectric units, ρ Pi represents the resistivity of the i-th thermoelectric unit in the direction from the P-type hot end to the P-type cold end in the P-type thermoelectric element;

[0015] The calculation formula of the resistivity of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end is:

[0016]

[0017] Where, ρ Nh Indicates the N-type hot end resistivity, ρ Nc represents the N-type cold end resistivity, M represents that the N-type thermoelectric element contains M segments of thermoelectric units, ρ Ni It represents the resistivity of the i-th thermoelectric unit in the direction from the N-type hot end to the N-type cold end in the N-type thermoelectric element.

[0018] Furthermore, the thermal conductivity calculation formula of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end is:

[0019]

[0020] Where λ Ph represents the thermal conductivity of the P-type hot end, λ Pc represents the thermal conductivity of the P-type cold end, λ irepresents the thermal conductivity of the i-th thermoelectric unit in the direction from the P-type hot end to the P-type cold end of the P-type thermoelectric element;

[0021] The thermal conductivity calculation formula of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end is:

[0022]

[0023] Where λ Ph Indicates the thermal conductivity of the N-type hot end, λ Pc represents the N-type cold end thermal conductivity, λ i It represents the thermal conductivity of the i-th thermoelectric unit in the direction from the N-type hot end to the N-type cold end in the N-type thermoelectric element.

[0024] Furthermore, the Seebeck coefficient of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end is calculated as follows:

[0025]

[0026] Where, α Ph Indicates the absolute value of the Seebeck coefficient of the P-type hot end, α Pc Indicates the absolute value of the P-type cold-end Seebeck coefficient, α pi represents the Seebeck coefficient of the i-th thermoelectric unit in the direction from the P-type hot end to the P-type cold end in the P-type thermoelectric element;

[0027] The calculation formula of the Seebeck coefficient of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end is:

[0028]

[0029] Where, α Nh Indicates the absolute value of the Seebeck coefficient of the N-type hot end, α Nc Indicates the absolute value of the N-type cold-end Seebeck coefficient, α Ni Represents the Seebeck coefficient of the i-th thermoelectric unit in the direction from the N-type hot end to the N-type cold end in the N-type thermoelectric element.

[0030] Based on the same concept, the present invention also proposes a thermoelectric cooling device, comprising a plurality of the above-mentioned thermoelectric cooling modules arranged according to a certain arrangement rule.

[0031] The present invention has the following advantages:

[0032] The present invention improves the performance of the thermoelectric cooling module by segmenting the thermoelectric elements in the thermoelectric cooling module to form non-uniform thermoelectric materials, thereby providing a new approach for optimizing the performance of thermoelectric cooling devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1A schematic structural diagram of a segmented thermoelectric cooling module provided in an embodiment of the present invention.

[0034] Figure 2 Schematic diagram comparing the effect of Seebeck coefficient on the thermoelectric cooling performance of segmented thermoelectric cooling modules and traditional thermoelectric cooling modules.

[0035] Figure 3 Schematic diagram comparing the effect of resistivity coefficient on the thermoelectric cooling performance of segmented thermoelectric cooling modules and traditional thermoelectric cooling modules.

[0036] Figure 4 Schematic diagram comparing the effect of thermal conductivity coefficient on the thermoelectric cooling performance of segmented thermoelectric cooling modules and traditional thermoelectric cooling modules. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact ratios, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0038] The thermoelectric cooling module mainly consists of an upper electrode 1, a lower electrode 2, and thermoelectric elements. The thermoelectric elements include an N-type thermoelectric element 3 and a P-type thermoelectric element 4, which are connected between the upper electrode 1 and the lower electrode 2, respectively. When current is applied, the temperature at the junction of the upper electrode 1 and the N-type thermoelectric element and the P-type thermoelectric element decreases, forming a cold junction; while the temperature at the junction of the lower electrode and the N-type thermoelectric element and the P-type thermoelectric element increases, forming a hot junction.

[0039] Assume the temperature of the hot end is T h , the temperature of the cold end is T c The current in the loop is I. The geometric parameters of the thermoelectric element are represented by the cross-sectional area A and the length L. The physical properties of the thermoelectric element material are represented by the Seebeck coefficient α, the thermal conductivity λ, and the resistivity ρ. The subscripts p and n are used to distinguish the two thermoelectric elements.

[0040] The calculation formulas for the total resistance R and total thermal conductivity κ of the thermoelectric cooling module are:

[0041]

[0042] Heat spontaneously transfers from high temperature to low temperature. Assuming there is no heat loss, the amount of heat transferred from the hot end to the cold end due to temperature difference is:

[0043] Q k =κ(T h -T c )=κΔT (3)

[0044] The Peltier heat (heat absorption) at the cold end is:

[0045] Q π =π pn I=α pn T c I (4)

[0046] The Joule heat on the thermoelectric arm between the N-type thermoelectric element and the P-type thermoelectric element is:

[0047] Q J =I 2 R (5)

[0048] Since Joule heat is transferred to both the cold and hot ends simultaneously, the heat absorbed by the cold end from the outside is the cooling capacity of the thermoelectric cooling module:

[0049]

[0050] Based on the above analysis, the cooling performance of the thermoelectric cooling module can be represented by the following three parameters:

[0051] (1) Temperature difference

[0052] ΔT=T h -T c (7)

[0053] (2) Refrigeration capacity

[0054]

[0055] (3) Refrigeration coefficient

[0056]

[0057] It can be seen that the cooling performance of the thermoelectric cooling module is closely related to the Seebeck coefficient, resistivity and thermal conductivity of the thermoelectric material. Changes in these three physical parameters will affect the amount of heat.

[0058] In view of this, the present invention proposes a segmented thermoelectric cooling module, which designs the thermoelectric element into a segmented structure. By adjusting the Seebeck coefficient, resistivity and thermal conductivity of the thermoelectric unit in each segment, a segmented thermoelectric cooling device with non-uniform thermoelectric material composition is formed to improve the cooling performance of the thermoelectric cooling module. Figure 1 As shown, the segmented thermoelectric cooling module consists of an upper electrode 1, a lower electrode 2 and a thermoelectric element, and the thermoelectric element includes a segmented P-type thermoelectric element 4 and an N-type thermoelectric element 3; the P-type thermoelectric element 4 and the N-type thermoelectric element 3 respectively include at least two segments of P-type thermoelectric units 6 and at least two segments of N-type thermoelectric units 5.

[0059] The P-type thermoelectric unit 6 of the P-type thermoelectric element 4 near the lower electrode 2 forms a P-type hot end, and the P-type thermoelectric unit 6 near the upper electrode 1 forms a P-type cold end. The N-type thermoelectric unit 5 of the N-type thermoelectric element 3 near the upper electrode 1 forms an N-type cold end, and the N-type thermoelectric unit 5 near the lower electrode 2 forms an N-type hot end. The resistivity of the P-type hot end is greater than the resistivity of the P-type cold end, and the resistivity of the P-type thermoelectric unit 6 located between the P-type hot end and the P-type cold end decreases uniformly from the P-type hot end to the P-type cold end; the resistivity of the N-type hot end is greater than the resistivity of the N-type cold end, and the resistivity of the N-type thermoelectric unit 6 located between the N-type hot end and the N-type cold end decreases uniformly from the N-type hot end to the N-type cold end.

[0060] The resistivity calculation formula of the P-type thermoelectric unit 6 located between the P-type hot end and the P-type cold end is:

[0061]

[0062] Where, ρ Ph Indicates the P-type hot end resistivity, ρ Pc represents the P-type cold end resistivity, M represents that the P-type thermoelectric element 4 includes M segments of thermoelectric units, ρ Pi It represents the resistivity of the i-th thermoelectric unit in the direction from the P-type hot end to the P-type cold end in the P-type thermoelectric element 4.

[0063] Similarly, the resistivity of the N-type thermoelectric unit 5 located between the N-type hot end and the N-type cold end is calculated as follows:

[0064]

[0065] Where, ρ Nh Indicates the N-type hot end resistivity, ρ Nc represents the N-type cold end resistivity, M represents that the N-type thermoelectric element 3 includes M segments of thermoelectric units, ρ Ni It represents the resistivity of the i-th thermoelectric unit in the direction from the N-type hot end to the N-type cold end in the N-type thermoelectric element 3.

[0066] The thermal conductivity of the P-type hot end is greater than the thermal conductivity of the P-type cold end, and the thermal conductivity of the P-type thermoelectric unit 6 located between the P-type hot end and the P-type cold end decreases uniformly from the P-type hot end to the P-type cold end; the thermal conductivity of the N-type hot end is greater than the thermal conductivity of the N-type cold end, and the thermal conductivity of the N-type thermoelectric unit 5 located between the N-type hot end and the N-type cold end decreases uniformly from the N-type hot end to the N-type cold end.

[0067] Furthermore, the thermal conductivity calculation formula of the P-type thermoelectric unit 6 located between the P-type hot end and the P-type cold end is:

[0068]

[0069] Where λ Ph represents the thermal conductivity of the P-type hot end, λ Pc represents the thermal conductivity of the P-type cold end, λ i It represents the thermal conductivity of the i-th section of thermoelectric unit in the direction from the P-type hot end to the P-type cold end in the P-type thermoelectric element 4.

[0070] Similarly, the thermal conductivity calculation formula of the N-type thermoelectric unit 5 located between the N-type hot end and the N-type cold end is:

[0071]

[0072] Where λ Ph Indicates the thermal conductivity of the N-type hot end, λ Pc represents the N-type cold end thermal conductivity, λ i It represents the thermal conductivity of the i-th thermoelectric unit in the direction from the N-type hot end to the N-type cold end in the N-type thermoelectric element 3.

[0073] The Seebeck coefficient of the P-type hot end is greater than the Seebeck coefficient of the P-type cold end, and the Seebeck coefficient of the P-type thermoelectric unit 6 located between the P-type hot end and the P-type cold end decreases uniformly from the P-type hot end to the P-type cold end. The Seebeck coefficient of the N-type hot end is less than the Seebeck coefficient of the N-type cold end, and the Seebeck coefficient of the N-type thermoelectric unit 5 located between the N-type cold end and the N-type hot end decreases uniformly from the N-type cold end to the N-type hot end. In other words, the absolute values ​​of the Seebeck coefficients of the thermoelectric units located between the cold end and the hot end decrease uniformly from the hot end to the cold end.

[0074] Furthermore, the calculation formula of the Seebeck coefficient of the P-type thermoelectric unit 6 located between the P-type hot end and the P-type cold end is:

[0075]

[0076] Where, α Ph Indicates the absolute value of the Seebeck coefficient of the P-type hot end, α Pc Indicates the absolute value of the P-type cold-end Seebeck coefficient, α pi represents the Seebeck coefficient of the i-th thermoelectric unit in the direction from the P-type hot end to the P-type cold end in the P-type thermoelectric element 4, α Pi It represents the Seebeck coefficient of the i-th thermoelectric unit in the direction from the P-type hot end to the P-type cold end in the P-type thermoelectric element 4.

[0077] The calculation formula of the Seebeck coefficient of the N-type thermoelectric unit 5 located between the N-type hot end and the N-type cold end is:

[0078]

[0079] Where, α Nh Indicates the absolute value of the Seebeck coefficient of the N-type hot end, αNc Indicates the absolute value of the N-type cold-end Seebeck coefficient, α Ni represents the Seebeck coefficient of the i-th thermoelectric unit in the direction from the N-type hot end to the N-type cold end in the N-type thermoelectric element 3, α ni represents the Seebeck coefficient of the i-th thermoelectric unit in the direction from the N-type hot end to the N-type cold end in the N-type thermoelectric element 3.

[0080] The present invention further proposes a segmented thermoelectric cooling device, comprising a plurality of the segmented thermoelectric cooling modules described above, wherein the plurality of segmented thermoelectric cooling modules are distributed according to a certain arrangement rule.

[0081] In this example, the thermoelectric element is divided into two segments. The first segment is connected to the lower electrode 2, forming the hot end, and the second segment is connected to the upper electrode 1, forming the cold end. This study investigates the impact of physical parameters on cooling performance in segmented thermoelectric cooling devices (STECs) and traditional thermoelectric cooling devices (TECs). The average resistivity, average thermal conductivity, and average Seebeck coefficient of the thermoelectric elements in the segmented thermoelectric cooling module are identical to those in traditional hotspot control devices.

[0082] The cold end load air convection heat transfer coefficient is 1500W / (m 2 ·K), hot end temperature T h The temperature is set to 300 K and the ambient temperature is 295.15 K. The physical properties of the TEC thermoelectric element are shown in Table 1.

[0083] Table 1. Physical properties of TEC thermoelectric elements

[0084]

[0085]

[0086] In order to ensure that the average resistivity, thermal conductivity and Seebeck coefficient of the thermoelectric cooling modules of both segmented and non-segmented structures are constant, the physical properties of the p-type and n-type thermoelectric element materials in STEC are set as shown in Table 2.

[0087] Table 2. Physical properties of P and N type thermoelectric elements in STEC

[0088]

[0089] The first step is to consider the influence of the Seebeck coefficient. The resistivity and thermal conductivity are set to be consistent with the traditional structure TEC parameters. The Seebeck coefficient follows the segmented value. The performance of the thermoelectric cooling device is compared when the thermoelectric element is not segmented and when it is divided into two segments. Figure 2 As shown, Figure 2 (a) Comparing the temperature difference with the current, it can be clearly seen that the temperature difference generated by STEC is greater than that generated by TEC; Figure 2 (b) Comparing the variation of cold end cooling capacity with current, it can be clearly seen that the cooling capacity of STEC is greater than that of TEC.

[0090] The second step is to consider the effect of resistivity. The Seebeck coefficient and thermal conductivity are set to be consistent with the traditional structure TEC parameters. The resistivity follows the segmented value. The performance of the thermoelectric cooling device is compared when the thermoelectric element is not segmented and when it is divided into two segments. Figure 3 As shown, Figure 3 (a) Comparing the temperature difference with the current, it can be clearly seen that the temperature difference generated by STEC is greater than that generated by TEC; Figure 3 (b) Comparing the variation of cold end cooling capacity with current, it can be clearly seen that the cooling capacity of STEC is greater than that of TEC.

[0091] The third step considers the effect of thermal conductivity. The Seebeck coefficient and resistivity are set to be consistent with the traditional structure TEC parameters. The thermal conductivity follows the segmented value. The performance of the thermoelectric cooling device is compared when the thermoelectric element is not segmented and when it is divided into two segments. Figure 4 As shown, Figure 4 (a) Comparing the temperature difference with the current, it can be clearly seen that the temperature difference generated by STEC is greater than that generated by TEC; Figure 4 (b) Comparing the variation of cold end cooling capacity with current, it can be clearly seen that the cooling capacity of STEC is greater than that of TEC.

[0092] In summary, the performance of thermoelectric cooling devices can be improved by designing thermoelectric elements in sections.

[0093] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A segmented thermoelectric cooling module, comprising an upper electrode, a lower electrode, and a thermoelectric element disposed between the upper electrode and the lower electrode, characterized in that: The thermoelectric element includes a segmented P-type thermoelectric element and an N-type thermoelectric element, wherein the P-type thermoelectric element and the N-type thermoelectric element respectively include at least two segments of P-type thermoelectric units and at least two segments of N-type thermoelectric units; The P-type thermoelectric unit close to the upper electrode in the P-type thermoelectric element forms a P-type cold end, and the P-type thermoelectric unit close to the lower electrode forms a P-type hot end; the N-type thermoelectric unit close to the upper electrode in the N-type thermoelectric element forms an N-type cold end, and the N-type thermoelectric unit close to the lower electrode forms an N-type hot end; The resistivity of the P-type hot end is greater than that of the P-type cold end, and the resistivity of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end decreases uniformly from the P-type hot end to the P-type cold end; the resistivity of the N-type hot end is greater than that of the N-type cold end, and the resistivity of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end decreases uniformly from the N-type hot end to the N-type cold end; The resistivity calculation formula of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end is: Where, ρ Ph Indicates the P-type hot end resistivity, ρ Pc represents the P-type cold end resistivity, M represents that the P-type thermoelectric element contains M segments of thermoelectric units, ρ Pi represents the resistivity of the i-th thermoelectric unit in the direction from the P-type hot end to the P-type cold end in the P-type thermoelectric element; The calculation formula of the resistivity of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end is: Where, ρ Nh Indicates the N-type hot end resistivity, ρ Nc represents the N-type cold end resistivity, M represents that the N-type thermoelectric element contains M segments of thermoelectric units, ρ Ni It represents the resistivity of the i-th thermoelectric unit in the direction from the N-type hot end to the N-type cold end in the N-type thermoelectric element.

2. The segmented thermoelectric cooling module according to claim 1, wherein: The thermal conductivity of the P-type hot end is greater than the thermal conductivity of the P-type cold end, and the thermal conductivity of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end decreases uniformly from the P-type hot end to the P-type cold end; The thermal conductivity of the N-type hot end is greater than that of the N-type cold end, and the thermal conductivity of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end decreases uniformly from the N-type hot end to the N-type cold end.

3. The segmented thermoelectric cooling module according to claim 1, wherein: The Seebeck coefficient of the P-type hot end is greater than the Seebeck coefficient of the P-type cold end, and the absolute value of the Seebeck coefficient of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end decreases uniformly from the P-type hot end to the P-type cold end; The Seebeck coefficient of the N-type hot end is smaller than the Seebeck coefficient of the N-type cold end, and the absolute value of the Seebeck coefficient of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end decreases uniformly from the N-type hot end to the N-type cold end.

4. The segmented thermoelectric cooling module according to claim 2, wherein: The thermal conductivity calculation formula of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end is: Where λ Ph represents the thermal conductivity of the P-type hot end, λ Pc represents the thermal conductivity of the P-type cold end, λ i represents the thermal conductivity of the i-th thermoelectric unit in the direction from the P-type hot end to the P-type cold end of the P-type thermoelectric element; The thermal conductivity calculation formula of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end is: Where λ Ph Indicates the thermal conductivity of the N-type hot end, λ Pc represents the N-type cold end thermal conductivity, λ i It represents the thermal conductivity of the i-th thermoelectric unit in the direction from the N-type hot end to the N-type cold end in the N-type thermoelectric element.

5. The segmented thermoelectric cooling module according to claim 3, wherein: The calculation formula of the Seebeck coefficient of the P-type thermoelectric unit located between the P-type hot end and the P-type cold end is: Where, α Ph Indicates the absolute value of the Seebeck coefficient of the P-type hot end, α Pc Indicates the absolute value of the P-type cold-end Seebeck coefficient, α pi represents the Seebeck coefficient of the i-th thermoelectric unit in the direction from the P-type hot end to the P-type cold end in the P-type thermoelectric element; The calculation formula of the Seebeck coefficient of the N-type thermoelectric unit located between the N-type hot end and the N-type cold end is: Where, α Nh Indicates the absolute value of the Seebeck coefficient of the N-type hot end, α Nc Indicates the absolute value of the N-type cold-end Seebeck coefficient, α Ni Represents the Seebeck coefficient of the i-th thermoelectric unit in the direction from the N-type hot end to the N-type cold end in the N-type thermoelectric element.

6. A thermoelectric cooling device, characterized in that: The invention comprises a plurality of thermoelectric cooling modules according to any one of claims 1 to 5, which are arranged according to a certain arrangement rule.

Images