A cold and hot water mixing device
By designing a hot and cold water mixing device, the problem of poor EL caused by uneven mixing of hot and cold water was solved, and the hot and cold water were uniformly mixed before entering the slow lifting tank, thus improving the stability of the photovoltaic module manufacturing process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHU GCL INTEGRATED NEW ENERGY TECH CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-05-29
AI Technical Summary
In the manufacturing process of photovoltaic modules, uneven mixing of hot and cold water can cause excessively hot water to directly contact the silicon wafer, resulting in poor electroluminescence (EL) performance.
Design a hot and cold water mixing device, including a hot water inlet pipe, a cold water inlet pipe, a hot water outlet pipe, an outlet pipe and a mixer, and control the mixing and distribution of hot and cold water through valves to ensure that the hot and cold water are evenly mixed before entering the slow lifting tank.
This effectively avoids direct contact between hot water and silicon wafers, reduces the occurrence of EL defects, and improves the stability of the alkaline polishing production line in the workshop.
Smart Images
Figure CN224306217U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic module manufacturing equipment technology, specifically to a hot and cold water mixing device. Background Technology
[0002] Photovoltaic modules are a technology that uses the photoelectric effect of semiconductor materials to directly convert solar energy into electrical energy. The core principle is that when sunlight shines on a photovoltaic material (such as silicon), photons excite electrons, causing charge separation, which is then collected through electrodes to form an electric current.
[0003] In the solar cell manufacturing process, one step is the BSG removal and alkaline polishing process. This involves using a BSG removal chain machine to remove the BSG wrapped around the edges and back side, retaining the front-side BSG as a mask. The wafer then enters an alkaline polishing machine where a series of chemical reactions remove the PN junctions wrapped around the edges and back side, increasing the reflectivity of the back side of the solar cell and resulting in better bifaciality. During this process, the silicon wafer, after the reaction is complete, needs to pass through a slow-pull process tank to dehydrate the surface.
[0004] During the alkaline polishing process, a slow-lift tank rapidly places the silicon wafers, loaded in a basket, into a water tank with a continuous overflow of pure water via a robotic arm. The robotic arm slowly lifts the wafers at a speed of 3 cm / s, using water surface tension to pre-dehydrate the wafer surface. The water temperature in the slow-lift tank is controlled according to the PERC process configuration, with cold and hot water mixed in the tank. Cold water is replenished normally, and hot water is added when the temperature drops below the set temperature. During the hot water slow-lift process, when hot water from the water heater (temperatures exceeding the set temperature) enters the slow-lift tank to balance the tank temperature, this superheated water, not yet fully mixed, directly contacts the silicon wafer, causing EL (electrode lamination) defects. Utility Model Content
[0005] To solve at least one technical problem of the prior art, this utility model provides a hot and cold water mixing device.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a hot and cold water mixing device, including a hot water inlet pipe, a cold water inlet pipe, a hot water outlet pipe, an outlet pipe, and a mixing device. The hot water inlet pipe is connected to the mixing device and the hot water outlet pipe respectively. A first valve is installed on the hot water inlet pipe. When the first valve is open, the hot water in the hot water inlet pipe flows to the hot water outlet pipe. When the first valve is closed, the hot water in the hot water inlet pipe flows to the mixing device. The cold water inlet pipe is connected to the mixing device and the outlet pipe respectively. A second valve is installed on the cold water inlet pipe. When the second valve is open, the cold water in the cold water inlet pipe flows to the outlet pipe. When the second valve is closed, the cold water in the cold water inlet pipe flows to the mixing device. The mixing device is also connected to the outlet pipe and the mixing device.
[0007] In some embodiments, the mixer includes a cylinder and a spiral structure disposed within the cylinder and extending axially along the cylinder.
[0008] In some embodiments, the cylinder is made of PP or PVC material, and the spiral structure is made of PPH material.
[0009] In some embodiments, a third valve is installed at the inlet end of the hot water inlet pipe, and a fourth valve is installed at the inlet end of the cold water inlet pipe.
[0010] In some embodiments, a fifth valve is installed between the mixing device and the hot water outlet pipe, the fifth valve being used to control whether the mixing device is connected to the hot water outlet pipe.
[0011] In some embodiments, a sixth valve is installed between the hot water inlet pipe and the mixing valve, the sixth valve being used to control whether the hot water inlet pipe is connected to the mixing valve.
[0012] In some embodiments, a first flow meter is installed on the hot water inlet pipe, the first flow meter being used to detect the flow rate of hot water in the hot water inlet pipe;
[0013] A second flow meter is installed on the cold water inlet pipe, which is used to detect the flow rate of cold water in the cold water inlet pipe.
[0014] In some embodiments, the first flow meter and the second flow meter are float flow meters.
[0015] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:
[0016] This invention uses a water mixer to evenly mix hot and cold water, ensuring that the cold and hot water are mixed uniformly before entering the slow-lifting tank. This reduces the impact of external ambient temperature on the stability of the alkaline polishing production line in the workshop, effectively avoids direct contact of excessively hot water with silicon wafers, and reduces the occurrence of EL defects caused by direct contact of excessively hot water with silicon wafers. Attached Figure Description
[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the hot and cold water mixing device in one embodiment of the present invention;
[0019] Figure 2 This is a perspective view of the mixing device in one embodiment of the present invention. Detailed Implementation
[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0022] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0023] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.
[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.
[0025] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0026] Please see Figure 1 and Figure 2 This utility model provides a hot and cold water mixing device, including a hot water inlet pipe 1, a cold water inlet pipe 2, a hot water outlet pipe 43, an outlet pipe 4, and a mixer 5. The hot water inlet pipe 1 is connected to the mixer 5 and the hot water outlet pipe respectively. A first valve 6 is installed on the hot water inlet pipe 1. When the first valve 6 is open, the hot water in the hot water inlet pipe 1 flows to the hot water outlet pipe 43. When the first valve 6 is closed, the hot water in the hot water inlet pipe 1 flows to the mixer 5. The cold water inlet pipe 2 is connected to the mixer 5 and the outlet pipe 4 respectively. A second valve 7 is installed on the cold water inlet pipe 2. When the second valve 7 is open, the cold water in the cold water inlet pipe 2 flows to the outlet pipe 4. When the second valve 7 is closed, the cold water in the cold water inlet pipe 2 flows to the mixer 5. The mixer 5 is also connected to the outlet pipe 4 and the mixer 5.
[0027] In some embodiments, the mixing device 5 includes a cylinder 51 and a spiral structure 52 disposed within the cylinder 51 and extending axially along the cylinder 51.
[0028] In some embodiments, the cylinder 51 is made of PP or PVC material, and the spiral structure 52 is made of PPH material.
[0029] Furthermore, the length of the cylinder 51 is L, where L ≥ 40 cm.
[0030] In some embodiments, a third valve 12 is installed at the inlet end of the hot water inlet pipe 1, and a fourth valve 13 is installed at the inlet end of the cold water inlet pipe 2.
[0031] In some embodiments, a fifth valve 9 is installed between the mixing device 5 and the hot water outlet pipe 43. The fifth valve 9 is used to control whether the mixing device 5 is connected to the hot water outlet pipe 43.
[0032] In some embodiments, a sixth valve 8 is installed between the hot water inlet pipe 1 and the mixing valve 5. The sixth valve 8 is used to control whether the hot water inlet pipe 1 is connected to the mixing valve 5.
[0033] In some embodiments, a first flow meter 10 is installed on the hot water inlet pipe 1, and the first flow meter 10 is used to detect the flow rate of hot water in the hot water inlet pipe 1;
[0034] A second flow meter 11 is installed on the cold water inlet pipe 2. The second flow meter 11 is used to detect the flow rate of cold water in the cold water inlet pipe 2.
[0035] In some embodiments, the first flow meter 10 and the second flow meter 11 are float flow meters.
[0036] When the fourth valve 13 and the second valve 7 are open, and the third valve 12, the sixth valve 8, the first valve 6, and the fifth valve 9 are closed, the hot and cold water mixing device injects cold water into the slow-lifting tank. When the third valve 12 and the first valve 6 are open, and the fourth valve 13, the sixth valve 8, the fifth valve 9, and the second valve 7 are closed, the hot and cold water mixing device injects hot water into the slow-lifting tank. When the third valve 12, the fourth valve 13, the sixth valve 8, and the fifth valve 9 are open, and the first valve 6 and the second valve 7 are closed, the hot and cold water mixing device injects mixed warm water into the slow-lifting tank, and the mixed warm water is injected into the slow-lifting tank from the hot water outlet pipe 43 and the outlet pipe 4. When the third valve 12, the fourth valve 13, and the sixth valve 8 are open, and the first valve 6, the second valve 7, and the fifth valve 9 are closed, the hot and cold water mixing device injects mixed warm water into the slow-lifting tank, and the mixed warm water is injected into the slow-lifting tank only from the outlet pipe 4.
[0037] This invention allows for the injection of cold water, hot water, and mixed warm water into the slow-lifting tank by opening or closing different valves, in order to adapt to the process characteristics of different products on the production line.
[0038] Furthermore, the third valve 12 and the fourth valve 13 can be manual diaphragm valves.
[0039] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A hot and cold water mixing device, characterized in that, The system includes a hot water inlet pipe, a cold water inlet pipe, a hot water outlet pipe, an outlet pipe, and a mixing valve. The hot water inlet pipe is connected to both the mixing valve and the hot water outlet pipe. A first valve is installed on the hot water inlet pipe. When the first valve is open, the hot water in the hot water inlet pipe flows to the hot water outlet pipe. When the first valve is closed, the hot water in the hot water inlet pipe flows to the mixing valve. The cold water inlet pipe is connected to both the mixing valve and the outlet pipe. A second valve is installed on the cold water inlet pipe. When the second valve is open, the cold water in the cold water inlet pipe flows to the outlet pipe. When the second valve is closed, the cold water in the cold water inlet pipe flows to the mixing valve. The mixing valve is also connected to both the outlet pipe and the mixing valve.
2. The hot and cold water mixing device as described in claim 1, characterized in that, The mixing device includes a cylinder and a spiral structure disposed within the cylinder and extending axially along the cylinder.
3. The hot and cold water mixing device as described in claim 2, characterized in that, The cylinder is made of PP or PVC material, and the spiral structure is made of PPH material.
4. The hot and cold water mixing device as described in claim 1, characterized in that, A third valve is installed at the inlet end of the hot water inlet pipe, and a fourth valve is installed at the inlet end of the cold water inlet pipe.
5. The hot and cold water mixing device as described in claim 1, characterized in that, A fifth valve is installed between the mixing device and the hot water outlet pipe. The fifth valve is used to control whether the mixing device is connected to the hot water outlet pipe.
6. The hot and cold water mixing device as described in claim 1, characterized in that, A sixth valve is installed between the hot water inlet pipe and the mixing valve. The sixth valve is used to control whether the hot water inlet pipe is connected to the mixing valve.
7. The hot and cold water mixing device according to any one of claims 1 to 6, characterized in that, A first flow meter is installed on the hot water inlet pipe, and the first flow meter is used to detect the flow rate of hot water in the hot water inlet pipe; A second flow meter is installed on the cold water inlet pipe, which is used to detect the flow rate of cold water in the cold water inlet pipe.
8. The hot and cold water mixing device as described in claim 7, characterized in that, The first flow meter and the second flow meter are float flow meters.