Thermoelectric refrigeration assembly cleaning tool and cleaning method

Abstract

The invention provides a thermoelectric refrigeration assembly cleaning tool and a cleaning method, and belongs to the technical field of semiconductor refrigeration device cleaning. The cleaning tool comprises a pressing plate, a positioning plate and a supporting net. The positioning plate is provided with a plurality of containing grooves with the two ends open and used for containing the thermoelectric refrigeration assembly. The pressing plate and the supporting net abut against the two sides of the positioning plate correspondingly and are used for blocking the containing groove so as to limit movement of the thermoelectric refrigeration assembly. According to the cleaning tool for the thermoelectric refrigeration assemblies, the multiple thermoelectric refrigeration assemblies can be clamped at a time, efficient and lossless batch cleaning is achieved, the labor intensity of workers is effectively reduced, and the cleaning efficiency and the cleaning quality are improved; according to the cleaning method, three times of ultrasonic cleaning operation and two times of rinsing operation are alternately carried out, impurities, scaling powder, residual glue and oxide on the thermoelectric refrigeration assembly are sequentially removed, each operation is independently carried out, the operation sequence is scientific and reasonable, and the surface cleanliness of the thermoelectric refrigeration assembly is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning semiconductor refrigeration devices, and in particular relates to a cleaning tool and a cleaning method for a temperature difference electric refrigeration component. Background Art

[0002] Thermoelectric components are devices that use the thermoelectric effect of semiconductors to produce cooling. They use PN junctions made of semiconductor materials to form thermocouple pairs. When direct current is passed, the Peltier effect is generated, absorbing heat at one end of the device and releasing heat at the other end. Conventional thermoelectric cooling components include an upper ceramic sheet, a lower ceramic sheet, and N-type and P-type components arranged between the two. Thermoelectric components have the characteristics of long life, no pollution, no noise, flexible installation, and accurate temperature control. They have been widely used in many fields. However, during the production process of thermoelectric cooling components, scratches, flux, residual glue, surface oxides, etc. will be formed on the thermoelectric cooling components, affecting the welding quality of the thermoelectric cooling components when they are subsequently welded to the chip. Therefore, the thermoelectric cooling components need to be cleaned. The existing cleaning method is: first, a pure water cleaning method is used to perform a first pure water cleaning on the thermoelectric cooling component, and then a preset ratio of chemical cleaning liquid and pure water is used to perform ultrasonic cleaning on the thermoelectric cooling component after the first pure water cleaning, and finally a pure water cleaning method is used again to perform a second pure water cleaning on the thermoelectric cooling component after ultrasonic cleaning. Although this method can effectively remove the solder flux on the thermoelectric cooling component, other dirt such as residual glue and oxides are difficult to remove simultaneously. In order to ensure the cleanliness of the thermoelectric cooling component, other cleaning methods need to be used. At the same time, the thermoelectric cooling component itself is small in size, and the number of cleanings each time is large after batch production. The single-piece cleaning method is inefficient, which seriously restricts production efficiency. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a temperature difference electric refrigeration component cleaning tool and cleaning method, which is particularly suitable for realizing efficient and lossless batch cleaning, effectively reducing the labor intensity of workers and improving cleaning efficiency and cleaning quality.

[0004] The technical solution adopted by the present invention is: a cleaning tool for a thermoelectric refrigeration component, comprising a pressing plate, a positioning plate and a supporting net; the positioning plate is provided with a plurality of receiving grooves with openings at both ends for placing the thermoelectric refrigeration component; the pressing plate and the supporting net are respectively abutted against two sides of the positioning plate, for blocking the receiving grooves to limit the movement of the thermoelectric refrigeration component.

[0005] Furthermore, the support net includes a net body and a frame arranged around the net body, and the mating surfaces of the net body and the frame are flush.

[0006] Furthermore, the shape of the receiving groove is adapted to the thermoelectric refrigeration component, and the depth of the receiving groove is greater than the thickness of the thermoelectric refrigeration component by 0.5 mm to 1 mm.

[0007] Furthermore, a positioning pin is provided on the docking surface, and the positioning plate and the pressure plate are provided with corresponding connecting ears for aligning and connecting with the positioning pin.

[0008] Furthermore, the containing grooves are arranged vertically and horizontally, and the pressing plate is provided with pressure strips corresponding to the number of rows or columns of the containing grooves.

[0009] Furthermore, the width of the pressure strip is smaller than the corresponding width of the opening of the accommodating groove; and water-permeable openings are provided between the pressure strips.

[0010] A method for cleaning a thermoelectric refrigeration component comprises placing a plurality of thermoelectric refrigeration components into the above-mentioned thermoelectric refrigeration component cleaning tool for cleaning, wherein the front of the thermoelectric refrigeration component faces a support net.

[0011] Further, the following steps are included:

[0012] Putting the thermoelectric refrigeration component cleaning tool clamped with the thermoelectric refrigeration component into deionized water for the first ultrasonic cleaning;

[0013] Putting the cleaning tool of the thermoelectric cooling component that has undergone the first ultrasonic cleaning into a flux cleaning agent, and performing a second ultrasonic cleaning;

[0014] Putting the cleaning tool for the thermoelectric refrigeration component that has undergone the second ultrasonic cleaning into deionized water for the first rinsing;

[0015] Putting the cleaning tool for the thermoelectric refrigeration component that has been rinsed for the first time into the degumming agent for a third ultrasonic cleaning;

[0016] Putting the cleaning tool for the thermoelectric refrigeration component that has been ultrasonically cleaned for the third time into the deionized water for a second rinse;

[0017] Putting the cleaning tool for the thermoelectric refrigeration component that has been rinsed for the second time into a blast drying oven for drying;

[0018] The dried temperature difference electric cooling component cleaning tool is placed in a plasma cleaning machine for plasma cleaning.

[0019] Furthermore, the support net of the temperature difference electric refrigeration component cleaning tool is placed downward.

[0020] Furthermore, the first ultrasonic cleaning, the second ultrasonic cleaning, the third ultrasonic cleaning, the first rinsing and the second rinsing are all carried out in an ultrasonic cleaning device, and the ultrasonic cleaning device is provided with at least three independent cleaning tanks and two independent rinsing tanks, wherein the cleaning tanks respectively contain the deionized water, the flux cleaning agent and the degumming agent; and the rinsing tank contains deionized water.

[0021] The advantages and positive effects of the present invention are:

[0022] (1) The cleaning tool for thermoelectric cooling components proposed in the present application can clamp multiple thermoelectric cooling components at one time, which can not only ensure that the cleaning liquid is fully infiltrated, but also limit the thermoelectric cooling components to prevent them from moving or scratching during the cleaning process, thereby achieving efficient and non-destructive batch cleaning; effectively reducing the labor intensity of workers, improving cleaning efficiency and cleaning quality, and ensuring the welding quality of the thermoelectric cooling components during subsequent welding operations.

[0023] (2) The cleaning method proposed in the present application adopts three ultrasonic cleaning operations and two rinsing operations interspersed to remove impurities, flux and residual glue on the thermoelectric cooling components in turn, and then uses an ion cleaning machine to remove oxides on the thermoelectric cooling components. Each operation is carried out independently, and the operation sequence is scientific and reasonable, avoiding the influence between adjacent steps, ensuring a good cleaning effect, and effectively improving the surface cleanliness of the thermoelectric cooling components. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural schematic diagram of a positioning plate in a specific embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of a support network in a specific embodiment of the present invention.

[0026] Figure 3 is a side view of a support mesh in a specific embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the pressing plate structure in a specific embodiment of the present invention.

[0028] In the figure:

[0029] 1. Positioning plate 11, receiving groove 12, connecting ear

[0030] 2. Support net 21, net body 22, frame

[0031] 23, positioning pin 3, pressure plate 31, pressure strip

[0032] 32. Water permeable port DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0034] The present invention provides a cleaning tool for thermoelectric cooling components, which can clamp multiple thermoelectric cooling components at one time and ensure that the cleaning liquid fully infiltrates each component. At the same time, the thermoelectric cooling components can be limited to avoid random movement or scratches during the cleaning process, thereby achieving efficient and non-destructive batch cleaning. The use of the cleaning tool effectively reduces the labor intensity of workers, improves the cleaning efficiency and cleaning quality, and ensures the welding quality of the thermoelectric cooling components in subsequent welding operations.

[0035] like Figure 1-Figure 4 As shown, the cleaning tool for the thermoelectric refrigeration component proposed in the present application includes a pressing plate 3, a positioning plate 1 and a supporting net 2; wherein, the positioning plate 1 is provided with a plurality of receiving grooves 11 with openings at both ends for placing the thermoelectric refrigeration component; the pressing plate 3 and the supporting net 2 are respectively abutted against the two sides of the positioning plate 1, for blocking the receiving grooves 11 to limit the movement of the thermoelectric refrigeration component.

[0036] The positioning plate 1 is a flat plate with a certain thickness, and the receiving groove 11 forms a through groove along the thickness direction thereof. The thermoelectric cooling component in the present application includes an upper ceramic sheet, a lower ceramic sheet, and N-type and P-type elements arranged therebetween, and is in the shape of a regular plate as a whole. The thermoelectric cooling component is placed in the receiving groove 11 along the thickness direction. The shape and size of the receiving groove 11 are adapted to the thermoelectric cooling component to be cleaned, and should not be too large or too small; it is understandable that when the receiving groove 11 is too small, it is difficult to place the thermoelectric cooling component therein, which may easily cause damage to the thermoelectric cooling component; when the receiving groove 11 is too large, the thermoelectric cooling component therein may easily move or change its posture during the cleaning or transfer process, thereby affecting the cleaning effect of the thermoelectric cooling component.

[0037] The above-mentioned pressing plate 3 and supporting net 2 are arranged on both sides of the positioning plate 1 in the thickness direction. Preferably, the positioning plate 1 and the supporting net 2 are respectively attached to the two side surfaces of the positioning plate 1 to ensure that there is no gap between the three, so as to prevent the thermoelectric cooling component from falling out of the receiving groove 11 from the gap; wherein the supporting net 2 is provided with dense meshes, so that the cleaning liquid can enter or flow out of the receiving groove 11 through the meshes, and after sufficient contact and reaction with the thermoelectric cooling component in the receiving groove 11, the flux, residual glue, surface oxide and other residues on the thermoelectric cooling component are taken away, which helps to achieve a good cleaning effect; at the same time, after the cleaning is completed, the supporting net 2 of the cleaning tool is placed downward on a plane, and the pressing plate 3 and the positioning plate 1 are removed successively, and the thermoelectric cooling component can be placed flat on the supporting net 2, so that multiple thermoelectric cooling components can be taken out conveniently, efficiently and safely.

[0038] The above-mentioned support net 2 includes a net body 21 and a frame 22 arranged around the net body 21. The net body 21 is made of a material with properties such as wear resistance, chemical resistance, flexibility and self-lubrication, which can effectively intercept without scratching the thermoelectric refrigeration component; the frame 22 is made of a material with a certain rigidity to form sufficient support for the net body 21 and is not easy to deform; the positioning plate 1 and the pressure plate 3 are also made of a material with a certain rigidity to effectively limit the movement or separation of the thermoelectric refrigeration component.

[0039] Preferably, the surface where the frame 22 contacts the positioning plate 1 is a docking surface, and the docking surfaces of the mesh body 21 and the frame 22 are flush, so that the mesh body 21 can fit in the receiving groove 11;

[0040] Furthermore, the depth of the receiving groove 11 is greater than the thickness of the thermoelectric refrigeration component by 0.5mm-1mm, so that when the thermoelectric refrigeration component is placed in the receiving groove 11, since the density of the thermoelectric refrigeration component is greater than the density of the cleaning solution, the thermoelectric refrigeration component will settle on the supporting net 2, and the mesh body 21 of the supporting net 2 has a smooth structure, and the component is not easily scratched due to friction during the cleaning process; through this design, on the one hand, it is convenient for the cleaning liquid to fully contact various parts of the thermoelectric refrigeration component, evenly remove residues in different parts, and achieve a good cleaning effect; on the other hand, it can avoid the thermoelectric refrigeration component from being damaged by friction due to contact with the pressure plate 3.

[0041] Furthermore, a positioning pin 23 is provided on the docking surface, and the positioning plate 1 and the pressure plate 3 are provided with corresponding connecting ears 12, which are used to be connected in alignment with the positioning pin 23, thereby realizing the connection of the pressure plate 3, the positioning plate 1 and the support net 2 into one; specifically, the connecting ear 12 is provided with a connecting hole adapted to the positioning pin 23; the positioning pin 23, the connecting ear 12 and the connecting hole are all arranged in alignment, so that after the positioning pin 23 passes through the connecting ear 12 of the positioning plate 1 and the connecting ear 12 of the pressure plate 3 in turn, the pressure plate 3 and the support net 2 can form an effective blockage of the accommodating groove 11.

[0042] In a specific embodiment, there are at least two positioning pins 23 which are offset on the frame 22 of the support net 2 . The connecting ears 12 on the pressing plate 3 and the support net 2 protrude outward from their main bodies and are arranged corresponding to the positions of the positioning pins 23 .

[0043] Preferably, the receiving grooves 11 are arranged vertically and horizontally, and the pressure plate 3 is provided with pressure strips 31 corresponding to the number of rows or columns of the receiving grooves 11. When the pressure plate 3 is connected to the positioning plate 1, each pressure strip 31 can be aligned with a row or a column of the receiving grooves 11 to form an effective blockage for the receiving grooves 11.

[0044] The width of the above-mentioned pressure strip 31 is smaller than the corresponding width of the opening of the receiving groove 11, so that the pressure strip 31 does not completely cover the opening of the receiving groove 11, and a gap with a certain width is formed between the two. The size of the gap can allow the cleaning liquid to enter and exit, but it is not enough to make the thermoelectric refrigeration component fall out of the receiving groove 11; a water permeable port 32 is provided between the pressure strips 31; through the above-mentioned technical solution, the cleaning liquid can freely enter and flow out of the receiving groove 11 on both sides, thereby enhancing the flow performance of the cleaning liquid, effectively improving its flushing force and permeability, expanding the cleaning area, reducing the cleaning time, and also reducing the time required for the cleaning liquid to enter and flow out of the receiving groove 11, significantly improving the cleaning efficiency and cleaning quality.

[0045] The present application also proposes a method for cleaning a thermoelectric refrigeration component, wherein a plurality of thermoelectric refrigeration components are placed in the cleaning tool proposed in the present application for cleaning, wherein the front of the thermoelectric refrigeration components faces the support net 2, and the support net 2 of the cleaning tool faces downward.

[0046] The cleaning method comprises the following steps:

[0047] S1, placing the cleaning tool with the thermoelectric refrigeration component clamped therein into deionized water for the first ultrasonic cleaning to remove impurities remaining inside the thermoelectric refrigeration component during the production process;

[0048] S2, placing the cleaning tool that has undergone the first ultrasonic cleaning into a flux cleaning agent, and performing a second ultrasonic cleaning to remove the flux remaining on the surface of the thermoelectric cooling component during the welding process;

[0049] There are generally two types of flux: water-soluble flux and oil-soluble flux. In this application, the corresponding flux cleaning agent is selected according to the flux composition used. As the cleaning liquid for the second ultrasonic cleaning, the flux attached to the surface of the thermoelectric cooling component can be dissolved in the flux cleaning agent and fully removed.

[0050] S3, placing the cleaning tooling that has undergone the second ultrasonic cleaning into deionized water for the first rinse;

[0051] After the first ultrasonic cleaning of the thermoelectric cooling component in the cleaning tool, most of the flux attached to its surface has been removed, but it is inevitable that some residues will remain. The second ultrasonic cleaning can completely remove the flux, ensuring the cleaning effect of the flux.

[0052] S4, placing the cleaning tooling that has been rinsed for the first time into a degumming agent for a third ultrasonic cleaning;

[0053] After removing the residual flux on the surface of the thermoelectric cooling component, there is still a colloid attached to the ceramic sheet or used in the production process on the thermoelectric cooling component. According to the composition of the colloid, a corresponding degumming agent is selected as the cleaning liquid for the third ultrasonic cleaning to fully react with the residual glue on the thermoelectric cooling component and remove it.

[0054] S5, placing the cleaning tooling that has undergone the third ultrasonic cleaning into deionized water for a second rinse;

[0055] Similarly, most of the residual glue on the thermoelectric cooling component has been removed after the third ultrasonic cleaning, but it is inevitable that some residues still remain. The second rinse is performed to ensure that all the residual glue is removed.

[0056] S6, placing the cleaning tooling that has been rinsed for the second time into a blast drying oven for drying;

[0057] By drying quickly, water stains on the surface of the thermoelectric cooling component caused by slow drying can be avoided, which affects the appearance of the thermoelectric cooling component.

[0058] S7, placing the dried cleaning tooling into a plasma cleaning machine for plasma cleaning.

[0059] After drying, the surface of the thermoelectric cooling component can be clean and free of dirt and water stains, but there are still oxides generated in the production process on its surface. Put the cleaning tooling into the vacuum chamber of the plasma cleaning machine, turn on the vacuum pump to evacuate, and then turn on the RF power supply to generate a hydrogen-argon mixed gas to remove the oxides on the surface of the thermoelectric cooling component. This step can enhance the solderability of the thermoelectric cooling component with the client's heat sink, fins and other heat dissipation equipment as well as electronic devices such as chips.

[0060] At this point, all impurities, flux, residual glue and oxides on the thermoelectric cooling component have been removed, meeting the cleaning quality requirements. The cleaning tool can be taken out and placed on a flat surface, and the pressing plate 3 and the positioning plate 1 can be removed in turn. Finally, the thermoelectric cooling component on the support net 2 can be taken out and entered into the next processing step.

[0061] In the present application, the first ultrasonic cleaning, the second ultrasonic cleaning, the third ultrasonic cleaning, the first rinsing and the second rinsing are all carried out in an ultrasonic cleaning device, which is provided with at least three independent cleaning tanks and two independent rinsing tanks, wherein the cleaning tanks are respectively filled with deionized water, flux cleaning agent and degumming agent; the rinsing tank is filled with deionized water; during cleaning, the cleaning tooling is manually taken in and placed to realize the circulation of the cleaning tooling between different cleaning tanks and rinsing tanks.

[0062] The cleaning method proposed in the present application adopts three ultrasonic cleaning operations and two rinsing operations interspersed to remove impurities, flux and residual glue on the thermoelectric cooling components in turn, and then uses an ion cleaning machine to remove oxides on the thermoelectric cooling components. Each operation is performed independently, and the operation sequence is scientific and reasonable, avoiding the influence between adjacent steps, ensuring a good cleaning effect, and effectively improving the surface cleanliness of the thermoelectric cooling components; at the same time, the thermoelectric cooling components can be cleaned in batches, and each thermoelectric cooling component can achieve the same cleaning effect. Workers only need to perform loading and unloading operations, which greatly reduces the labor intensity of workers, improves cleaning efficiency, and thereby reduces the overall production cost of the thermoelectric cooling components.

[0063] The technical solution of the present application is described in detail below in conjunction with specific embodiments.

[0064] Example 1

[0065] The present application proposes a cleaning tool for a thermoelectric cooling component, which is used to clean a thermoelectric cooling component with a specification of 6mm×6mm×3mm. The thermoelectric cooling component has a "sandwich" structure consisting of a cold surface ceramic substrate, a hot surface ceramic substrate and bismuth telluride grains, which can accurately control the temperature of electronic components. The substrate, components and chips of the thermoelectric cooling component are welded using solders such as lead-tin / tin-antimony / gold-tin.

[0066] The cleaning tool includes a pressing plate 3, a positioning plate 1 and a supporting net 2; wherein the thickness of the positioning plate 1 is 4 mm, and the size of the receiving groove 11 is 7 mm×7 mm; the positioning plate 1 is provided with 500 receiving grooves 11 arranged vertically and horizontally, the number of receiving grooves 11 in each row is 25, and there are 20 rows in total; both ends of the receiving groove 11 are provided with openings; the pressing plate 3 is provided with 20 pressure strips 31, and water permeable openings 32 are provided between the pressure strips 31.

[0067] The positioning plate 1 and the pressure plate 3 in the present application are made of aluminum alloy material, the mesh body 21 of the support net 2 is made of nylon material with a mesh size of 80 meshes, and the frame of the support net 2 is also made of aluminum alloy material, which has good rigidity and anti-deformation properties.

[0068] A locating pin 23 is respectively provided on the two opposite sides of the frame of the support net 2, and the two locating pins 23 are staggered; corresponding positions of the positioning plate 1 and the pressing plate 3 are provided with connecting ears 12, and the connecting ears 12 are provided with connecting ears 12 that can accommodate the positioning pin 23 to pass through. By passing the connecting ears 12 of the positioning plate 1 through the locating pin 23, and then passing the connecting ears 12 of the pressing plate 3 through the locating pin 23, the pressure strips 31 on the support net 2 and the pressing plate 3 can be respectively attached to the openings of the accommodating groove 11 on the positioning plate 1, thereby completing the alignment connection of the three.

[0069] The cleaning tool can clamp 1-500 thermoelectric refrigeration components at a time, can limit the thermoelectric refrigeration components, and allow the cleaning liquid to flow freely in the receiving tank 11, thereby achieving efficient and lossless batch cleaning and significantly improving the cleaning efficiency of the thermoelectric refrigeration components.

[0070] Example 2

[0071] A method for cleaning a thermoelectric cooling component, wherein the cleaning tool having 500 thermoelectric cooling components clamped therein in Example 1 is successively placed in an ultrasonic cleaning device and a plasma cleaning machine for cleaning, wherein the front of the thermoelectric cooling component faces a support net 2, and the support net 2 of the cleaning tool is placed downward.

[0072] The ultrasonic cleaning equipment is provided with at least three independent cleaning tanks and two independent rinsing tanks, wherein the cleaning tanks are respectively filled with deionized water, flux cleaning agent and degumming agent; and the rinsing tank is filled with deionized water.

[0073] The cleaning method comprises the following steps:

[0074] S1. Place the cleaning tool with the thermoelectric cooling component clamped therein into deionized water for the first ultrasonic cleaning, set the working frequency to 40 Hz, and the cleaning time to 3 minutes; remove the impurities remaining inside the thermoelectric cooling component during the production process;

[0075] S2, placing the cleaning tool that has undergone the first ultrasonic cleaning into the flux cleaning agent for the second ultrasonic cleaning, setting the working frequency to 40HZ and the cleaning time to 3min, to remove the flux remaining on the surface of the thermoelectric cooling component during the welding process;

[0076] In this embodiment, the soldering flux used in the thermoelectric cooling component is mainly composed of rosin, so the soldering flux cleaning agent is selected from rosin cleaning agent, which can fully dissolve the soldering flux attached to the surface of the thermoelectric cooling component to achieve a cleaning effect.

[0077] S3. Put the cleaning tooling that has undergone the second ultrasonic cleaning into deionized water for the first rinse; the rinsing time is 1 minute, and all the residual flux on the thermoelectric cooling component is removed.

[0078] S4. Put the cleaning tooling that has been rinsed for the first time into the degumming agent for the third ultrasonic cleaning; set the working frequency to 40HZ and the cleaning time to 3min.

[0079] The main component of the degumming agent used in this embodiment is tridecaned hydrocarbons, which can effectively remove the residual colloid on the surface of the thermoelectric cooling component.

[0080] S5. Put the cleaning tooling that has undergone the third ultrasonic cleaning into deionized water for a second rinse; the rinsing time is 1 minute. Similarly, most of the residual glue on the thermoelectric cooling component has been removed after the third ultrasonic cleaning, but it is inevitable that some residues remain. The second rinse is performed to ensure that all the residual glue is removed.

[0081] S6. Put the cleaning tooling that has been rinsed for the second time into a blast drying oven for drying; set the drying temperature to 150° C. and the drying time to 3 minutes.

[0082] S7, placing the dried cleaning tooling into a plasma cleaning machine for plasma cleaning.

[0083] After drying, the surface of the thermoelectric cooling component is clean and free of dirt and water stains, but there are still oxides produced during the production process on its surface. The cleaning tool is placed in the vacuum chamber of the plasma cleaning machine, and after the vacuum pump is turned on to evacuate, the radio frequency power supply is turned on to generate a hydrogen-argon mixed gas to remove the oxides on the surface of the thermoelectric cooling component.

[0084] After testing, the residual amount of impurities, flux, residual glue and oxide on the thermoelectric cooling components is ≤1.0mg / cm 2 , meet the residual amount ≤1.0mg / cm 2 The standard is far superior to the cleaning effect achieved by the methods in the prior art.

[0085] The thermoelectric cooling component cleaning tool proposed in the present application can clamp multiple thermoelectric cooling components at one time and ensure that the cleaning liquid fully infiltrates each component. At the same time, it can limit the thermoelectric cooling components to prevent them from moving randomly or being scratched during the cleaning process, thereby achieving efficient and lossless batch cleaning.

[0086] The cleaning method proposed in the present application adopts three ultrasonic cleaning operations and two rinsing operations interspersed to remove impurities, flux and residual glue on the thermoelectric cooling components in turn, and then uses an ion cleaning machine to remove oxides on the thermoelectric cooling components. Each operation is performed independently, and the operation sequence is scientific and reasonable, avoiding the influence between adjacent steps, ensuring a good cleaning effect, and effectively improving the surface cleanliness of the thermoelectric cooling components; at the same time, the thermoelectric cooling components can be cleaned in batches, and each thermoelectric cooling component can achieve the same cleaning effect. Workers only need to perform loading and unloading operations, which greatly reduces the labor intensity of workers and improves cleaning efficiency, thereby reducing the overall production cost of the thermoelectric cooling components and ensuring the welding quality of the thermoelectric cooling components in subsequent welding operations.

[0087] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A cleaning tool for a thermoelectric refrigeration component, characterized in that: It includes a pressing plate, a positioning plate and a supporting net; the positioning plate is provided with a plurality of receiving grooves with openings at both ends for placing the thermoelectric refrigeration components; the pressing plate and the supporting net are respectively abutted against the two sides of the positioning plate, for blocking the receiving grooves to limit the movement of the thermoelectric refrigeration components.

2. The cleaning tool for thermoelectric refrigeration components according to claim 1, characterized in that: The supporting net comprises a net body and a frame arranged around the net body, and the mating surfaces of the net body and the frame are flush.

3. The cleaning tool for thermoelectric refrigeration components according to claim 2, characterized in that: The shape of the receiving groove is adapted to the thermoelectric refrigeration component, and the depth of the receiving groove is greater than the thickness of the thermoelectric refrigeration component by 0.5 mm to 1 mm.

4. The cleaning tool for thermoelectric refrigeration components according to claim 2 or 3, characterized in that: The butt joint surface is provided with a positioning pin, and the positioning plate and the pressure plate are provided with corresponding connecting ears for aligning and connecting with the positioning pin.

5. The cleaning tool for thermoelectric refrigeration components according to claim 4, characterized in that: The containing grooves are arranged vertically and horizontally, and the pressing plate is provided with pressing strips corresponding to the number of rows or columns of the containing grooves.

6. The cleaning tool for thermoelectric refrigeration components according to claim 5, characterized in that: The width of the pressure strip is smaller than the corresponding width of the opening of the accommodating groove; and water-permeable openings are arranged between the pressure strips.

7. A method for cleaning a thermoelectric refrigeration component, characterized in that: Put a plurality of temperature difference refrigeration components into the temperature difference electric refrigeration component cleaning tool as described in any one of claims 1 to 6 for cleaning, with the front of the temperature difference electric refrigeration components facing the support net.

8. The method for cleaning a thermoelectric refrigeration component according to claim 7, characterized in that: The following steps are involved: Putting the thermoelectric refrigeration component cleaning tool clamped with the thermoelectric refrigeration component into deionized water for the first ultrasonic cleaning; Putting the cleaning tool of the thermoelectric cooling component that has undergone the first ultrasonic cleaning into a flux cleaning agent, and performing a second ultrasonic cleaning; Putting the cleaning tool for the thermoelectric refrigeration component that has undergone the second ultrasonic cleaning into deionized water for the first rinsing; Putting the cleaning tool for the thermoelectric refrigeration component that has been rinsed for the first time into the degumming agent for a third ultrasonic cleaning; Putting the cleaning tool for the thermoelectric refrigeration component that has been ultrasonically cleaned for the third time into the deionized water for a second rinse; Putting the cleaning tool for the thermoelectric refrigeration component that has been rinsed for the second time into a blast drying oven for drying; The dried temperature difference electric cooling component cleaning tool is placed in a plasma cleaning machine for plasma cleaning.

9. The method for cleaning a thermoelectric refrigeration component according to claim 7, characterized in that: The support net of the temperature difference electric refrigeration component cleaning tool is placed downward.

10. The method for cleaning a thermoelectric refrigeration component according to claim 8, characterized in that: The first ultrasonic cleaning, the second ultrasonic cleaning, the third ultrasonic cleaning, the first rinsing and the second rinsing are all carried out in an ultrasonic cleaning device, and the ultrasonic cleaning device is provided with at least three independent cleaning tanks and two independent rinsing tanks, wherein the cleaning tanks respectively contain the deionized water, the flux cleaning agent and the degumming agent; and the rinsing tank contains deionized water.

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