CN115889296A - Spraying cleaning equipment and cleaning method - Google Patents

Abstract

The invention discloses a spray cleaning device and a cleaning method, comprising a rack, a cleaning section, a wind cutting isolation section, a rinsing section and a drying section; the spraying cleaning equipment also comprises a heat exchange system and an internal circulation exhaust system; the internal circulation exhaust system is arranged on the drying section; the heat exchange system comprises a primary heat exchanger and a secondary heat exchanger, and the heat exchange with the exhaust system and the rinsing tank is carried out, so that the externally supplied purified water is heated in the final rinsing step, and the temperature of the sprayed purified water is increased; meanwhile, the temperature of steam in the exhaust system can be reduced, and the outflow of the steam is reduced. Meanwhile, the air exhaust system can realize internal circulation; in constantly extracting the air that sprays in the cleaning equipment and carrying back cleaning equipment, the wind of fan extraction constantly makes its heat risee through the pipeline friction, can be so that the stoving effect is better, reduces the quantity and the heating power of stoving heating package, has also reduced steam and has discharged.

Description

Spraying cleaning equipment and cleaning method

Technical Field

The invention relates to the technical field of cleaning of electronic devices, in particular to a spraying cleaning device and a cleaning method.

Background

At present, along with the influences of miniaturization and high-density integration of components, a lead-free solder technology, market competitiveness, automatic assembly and the like in the market, the importance of cleaning electronic components is increased sharply, and technological challenges are brought to the cleaning of products.

Since the product is used in a harsh environment, the residue on the bottom of the device can attract moisture, causing damage such as leakage current and electrochemical migration, and therefore, the terminal on the bottom of the device must be kept clean.

In industrial application, the spraying cleaning equipment is mainly used for cleaning residual soldering flux, soldering paste, glue and the like on electronic devices, semiconductor silicon wafers, circuit boards and electronic product parts, and is also widely applied to cleaning attachments such as medium and small electroplating parts, mechanical hardware parts, automobile parts, aviation, national defense weapons, clocks, bearings, precision parts, compressor fittings, jig carriers, tools and the like.

The Chinese invention patent with the application publication number of CN 112170352A and the application publication number of 2021.01.05 discloses an online cleaning device and a cleaning process for a system packaged product, and the online cleaning device comprises a rack, a conveyor belt, a pre-cleaning process section, a chemical isolation process section and a rinsing process section, wherein the conveyor belt is used for driving the product to sequentially pass through the pre-cleaning process section, the chemical isolation process section and the rinsing process section at a certain speed to complete cleaning operation; a cleaning liquid tank is arranged below the pre-cleaning process section, the cleaning process section and the chemical isolation process section and is used for containing cleaning liquid; the pre-cleaning process section and the cleaning process section are respectively provided with an immersion liquid box for immersing products in the pre-cleaning chamber and the cleaning chamber; the cleaning process is based on the cleaning device. The invention adopts the structural design of the immersion tank, and the product is immersed while being sprayed and cleaned, so that the residues of the soldering flux are softened under the immersion action, and the cleaning effect is better.

However, the spray cleaning equipment in the prior art often has the following problems:

1. an exhaust system of the spray cleaning equipment can exhaust a large amount of steam, and the cleaning agent is carried in the large amount of steam, so that the working environment is severe; meanwhile, the cost of the cleaning agent is high, and the cleaning cost is increased due to the large amount of cleaning agent discharged for steam.

2. In the spraying and cleaning process, a large amount of energy consumption can be generated, and the promotion of national energy conservation and emission reduction advocated is not facilitated.

Disclosure of Invention

In order to overcome the problems in the prior art, the invention aims to provide spraying cleaning equipment and a cleaning method which are small in fog discharge amount, low in cost and more energy-saving.

In order to achieve the purpose, the invention provides the following technical scheme: a spray cleaning device comprises a rack, a cleaning section, a wind cutting isolation section, a rinsing section and a drying section; the spraying cleaning equipment is characterized by also comprising a heat exchange system and an internal circulation exhaust system; the heat exchange system comprises a primary heat exchanger and a secondary heat exchanger which are arranged on the rinsing section, and the internal circulation exhaust system is arranged on the drying section; and isolation curtains are arranged among the cleaning section, the wind cutting isolation section, the rinsing section and the drying section.

The invention is further configured to: the spraying cleaning equipment also comprises a feeding section and a discharging section which are respectively positioned at two ends of the spraying cleaning equipment; a conveying mesh belt penetrating through the spray cleaning equipment is connected between the feeding section and the discharging section; the conveying mesh belt is sequentially provided with a cleaning section, a rinsing section and a drying section; the wind cutting isolation sections are two in number and are respectively arranged between the cleaning section and the rinsing section as well as between the rinsing section and the drying section.

The invention is further configured to: the cleaning section comprises a cleaning box body, and a pre-cleaning section, a cleaning I section and a cleaning II section which are positioned in the cleaning box body; the rinsing section comprises a rinsing box body, and a pre-rinsing section, a rinsing I section, a rinsing II section and a final rinsing section which are positioned in the rinsing box body; the drying section comprises a drying box body and a hot air drying section positioned in the drying box body; and an upper row of spray pipes and a lower row of spray pipes are arranged in the cleaning section and the rinsing section.

The invention is further configured to: the spraying cleaning equipment also comprises two high-pressure fans, and the wind cutting isolation section and the drying section are respectively connected with the high-pressure fans; the drying section is also provided with a heating bag; the internal circulation exhaust system comprises a plurality of direct current variable frequency fans and an exhaust pipeline, and a plurality of latticed vents are arranged on the exhaust pipeline; the air suction opening of the direct current variable frequency fan is connected with the high pressure fan, and the air outlet is positioned at the top of the rack.

The direct-current variable-frequency fan is small in size, high in efficiency and capable of achieving internal circulation; direct current frequency conversion fan can constantly extract the air cycle that sprays in the cleaning equipment and carry back to the cleaning equipment in, the wind of fan extraction constantly makes its heat rise through pipeline friction for the stoving effect is better, can be in order to reduce the heating power among the stoving heating system.

The invention is further configured to: the primary heat exchanger is positioned in an exhaust pipeline at the top of the cleaning section; the water inlet of the first-stage heat exchanger is connected with external water supply equipment, the water outlet of the first-stage heat exchanger is connected with the water inlet of the second-stage heat exchanger, and the water outlet of the second-stage heat exchanger is connected with the rinsing section spray pipe.

The purpose of the rinsing is to ensure the cleanliness of rinsing, the final rinsing section supplies purified water for spray rinsing through a pipeline which is externally connected with water supply equipment, the purified water is generally at room temperature at the supply point, and the externally supplied purified water needs to be heated for ensuring the cleaning effect. The primary heat exchanger arranged at the exhaust system can exchange heat with steam in the exhaust system to raise the temperature of purified water in the heat exchanger pipe; meanwhile, the temperature of steam in the exhaust system can be reduced through heat exchange, the outflow of the steam is reduced, and the discharge of cleaning liquid is reduced.

The invention is further configured to: the spraying cleaning equipment also comprises a cleaning tank and a rinsing tank; the cleaning tank is arranged at the bottom of the cleaning section; the bottoms of the cleaning tank and the rinsing tank are obliquely arranged; the rinsing tank comprises a pre-rinsing tank, a secondary rinsing tank and a final rinsing tank which are sequentially and adjacently arranged and sequentially increased, and a water outlet is formed in the lowest position of the pre-rinsing tank; the secondary heat exchanger is arranged in the pre-rinsing tank and is close to the water drainage port.

The invention is further configured to: a liquid level sensor and a heating device are also arranged in the rinsing tank; the rinsing section is supplied with water by a rinsing tank, and spray water of the rinsing section flows back to the rinsing tank; the pre-rinsing section is supplied with water by a pre-rinsing tank, and spray water of the pre-rinsing section flows back to the pre-rinsing tank.

Through adopting above-mentioned technical scheme, use heating device to heat the water in the potcher, guarantee to supply to the spraying temperature of rinsing section in advance and rinsing I section, rinsing II section, guarantee the cleaning performance. Rinsing water enters the rinsing tank through spraying, then flows into the final rinsing tank and the pre-rinsing tank in sequence in an overflow mode, and then is discharged from the water outlet. The temperature of water discharged from the water outlet is still higher, and a secondary heat exchanger is arranged at a position close to the water outlet, so that hot water discharged from the water outlet exchanges heat with purified water entering from the outside, and the spraying temperature is increased.

The invention is further configured to: the spraying cleaning equipment also comprises a liquid storage tank, wherein the liquid storage tank is formed by welding and processing stainless steel plates, heat insulation cotton is arranged outside the liquid storage tank, and the liquid storage tank is connected with the cleaning tank and the rinsing tank; the liquid storage tank is internally provided with a slag receiving net, a water inlet pipe, a water discharging pipe and a pump suction port, and the bottom of the liquid storage tank is provided with a stainless steel heating pipe, a temperature control heating system, a liquid level detection sensor and a liquid level abnormity acousto-optic alarm device.

Due to the volatilization of water, the parts repeatedly enter and exit the cleaning tank, inevitably, cleaning liquid/rinsing liquid (DI water) can be brought out, and the overflowed cleaning liquid can cause the loss of the cleaning liquid/rinsing liquid (DI water) in the cleaning tank, so that the liquid storage tank is filled into the liquid level sensor, and the automatic liquid supplementing function is realized. When the liquid level is abnormal, the liquid level sensor sends out an alarm signal.

The spraying and cleaning equipment further comprises a circulating filter and a plurality of water pumps, and the circulating filter is connected with the cleaning tank.

The invention is further configured to: the spraying cleaning equipment also comprises a liquid receiving disc, and the liquid receiving disc is arranged at the bottom of the rack; the rack also comprises a plurality of access doors. The liquid receiving disc is arranged at the bottom of the frame and is connected with the cleaning tank and the rinsing tank; the rack also comprises a plurality of access doors.

The invention is further configured to: the spraying and cleaning equipment further comprises an electrical control system, and the electrical control system is electrically connected with the feeding section, the discharging section, the liquid level sensor and the temperature control heating system.

The invention also comprises a spray cleaning method, which is suitable for the spray cleaning equipment and comprises the following steps:

s1: feeding; conveying the piece to be cleaned into a spray cleaning machine by a conveying net belt;

s2: pre-cleaning; nozzles are respectively arranged at the upper part and the lower part of the spraying cavity, and all the nozzles spray high-pressure cleaning liquid to clean the workpiece; the pressure of the water pump is 0.2-0.5Mpa;

s3: strongly cleaning; the upper part and the lower part of the spraying cavity are respectively provided with a nozzle, all the nozzles spray high-pressure cleaning liquid to clean the workpiece, and the pressure of a water pump is 0.4-0.7Mpa;

s4: wind cutting isolation; the high-pressure fan is used for blowing off the liquid on the workpiece through the air cutting of the upper air knife and the lower air knife, so that the double effects of separating the cleaning liquid, saving the cost and improving the rinsing effect are achieved;

s5: pre-rinsing; a row of nozzles are respectively arranged above and below the spraying cavity, and all the nozzles spray high-pressure DI water to pre-rinse the workpiece;

s6: rinsing I; nozzles are respectively arranged at the upper part and the lower part of the spraying cavity, and all the nozzles spray high-pressure DI water to rinse the workpiece;

s7: rinsing II; nozzles are respectively arranged at the upper part and the lower part of the spraying cavity, and all the nozzles spray high-pressure DI water to further rinse the workpiece;

s8: final rinsing; DI water introduced from the outside of the equipment is pressurized by a booster pump, and then the workpiece is finally rinsed through an upper row of nozzles and a lower row of nozzles of a spraying cavity;

s9: cutting water by an air knife; the air cutting system mainly utilizes a high-pressure fan to blow off liquid on the workpiece through air cutting of an upper air knife and a lower air knife so as to achieve the aim of drying;

s10: drying by hot air circulation; the hot air circulation drying system adds the heating bag into the air cutting system, so that the air cutting temperature is increased, and the aim of accelerating drying is fulfilled;

s11: blanking; the conveying net belt sends the piece to be cleaned out of the spray cleaning machine.

In summary, the technical scheme of the invention has the following beneficial effects:

1. this application has designed heat transfer system, sets up in exhaust system department, and external water supply equipment supplies the pure water and sprays the rinsing, and the pure water of supply generally is the room temperature, need to heat the pure water of external supply for guaranteeing clean effect. The heat exchanger is arranged near the exhaust system, and can exchange heat with steam in the exhaust system to raise the temperature of the sprayed purified water; meanwhile, the temperature of the steam in the exhaust system can be reduced, and the outflow of the steam is reduced.

2. This application has also set up heat transfer system in potcher drain outlet department, makes the pure water heat transfer of outlet exhaust hot water and outside entering, when improving the spray temperature, also can reduce the power of heating rod in the potcher, resources are saved.

3. The air exhaust system adopts the direct-current variable-frequency fan, is small in size and high in efficiency, and can realize internal circulation; direct current frequency conversion fan can constantly extract the air that sprays in the cleaning equipment and carry back cleaning equipment in, the wind of fan extraction constantly makes its heat rise through pipeline friction for the stoving effect is better, can reduce the quantity and the heating power of the heating package among the stoving heating system.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic front view of the overall structure of the present invention;

FIG. 2 is a top view of the internal structure of the present invention;

FIG. 3 is a front view of the internal structure of the present invention;

FIG. 4 is a rear view of the internal structure of the present invention;

FIG. 5 is a rear view of the electrical control system box with the internal structure removed in accordance with the present invention;

FIG. 6 is a rear view of the overall structure of the present invention;

FIG. 7 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;

fig. 8 is a flow chart of the spray cleaning method of the present invention.

1-frame, 2-feeding section, 3-discharging section, 4-condenser, 5-cleaning box, 51-pre-cleaning section, 52-cleaning section, 53-cleaning tank, 6-wind-cutting isolation box, 61-wind-cutting isolation section, 7-rinsing box, 71-pre-rinsing section, 72-rinsing I section, 73-rinsing II section, 74-final rinsing section, 75-rinsing tank, 8-wind-cutting isolation section II, 9-drying box, 91-drying section, 10-liquid storage box, 11-air exhaust system, 12-primary heat exchanger, 13-secondary heat exchanger, 110-circulating filter, 120-water pump, 130-high pressure fan, 140-heating bag, 150-electric control system box.

Detailed Description

In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc., referred to in the following embodiments are directions with reference to the drawings only, and thus, the directional terms used are intended to illustrate rather than limit the inventive concept.

The invention is further described with reference to the drawings and the preferred embodiments.

Example 1:

as shown in fig. 1-7, which are schematic diagrams of basic structures of preferred embodiments of the present invention, an online spray cleaning apparatus includes a frame 1, a cleaning section, a wind-cutting isolation section, a rinsing section and a drying section; the spraying cleaning equipment is characterized by also comprising a heat exchange system and an internal circulation exhaust system; the heat exchange system comprises a primary heat exchanger 12 and a secondary heat exchanger 13 which are arranged on the rinsing section, and the internal circulation exhaust system is arranged on the drying section 91; and isolation curtains are arranged among the cleaning section, the wind cutting isolation section, the rinsing section and the drying section.

As shown in fig. 2-3, the on-line spray cleaning device further comprises a feeding section 2 and a discharging section 3 respectively located at two ends of the spray cleaning device; a conveying mesh belt penetrating through the spray cleaning equipment is connected between the feeding section 2 and the discharging section 3; the conveying mesh belt is sequentially provided with a cleaning section, a rinsing section and a drying section; the wind cutting isolation sections are two in number and are respectively arranged between the cleaning section and the rinsing section as well as between the rinsing section and the drying section.

The cleaning section comprises a cleaning box body 5, and a pre-cleaning section 51, a cleaning I section 52 and a cleaning II section 521 which are positioned in the cleaning box body; the rinsing section comprises a rinsing box body 7, and a pre-rinsing section 71, a rinsing I section 72, a rinsing II section 73 and a final rinsing section 74 which are positioned in the rinsing box body 7; the drying section 91 comprises a drying box body 9 and a hot air drying I section and a hot air drying II section which are positioned in the drying box body 9. And an upper row of spray pipes and a lower row of spray pipes are arranged in the cleaning section and the rinsing section.

The spraying cleaning equipment also comprises two high-pressure fans 130, and the wind-cutting isolation section 61 and the drying section 91 are respectively connected with the high-pressure fans 130; the drying section 91 is also provided with a heating bag 140; the internal circulation exhaust system comprises a plurality of direct current variable frequency fans and an exhaust pipeline, wherein an exhaust inlet of each direct current variable frequency fan is connected with the high-pressure fan 130, and an air outlet is positioned at the top of the rack 1.

The direct-current variable frequency fan has small volume and high efficiency, and can realize internal circulation; direct current frequency conversion fan can constantly extract the air that sprays in the cleaning equipment and carry back cleaning equipment in, the wind of fan extraction constantly makes its heat rise through pipeline friction for the stoving effect is better, can reduce the heating power among the stoving heating system.

As shown in fig. 7, the primary heat exchanger 12 is located in the exhaust duct at the top of the cleaning section; the water inlet of the primary heat exchanger 12 is connected with external water supply equipment, the water outlet of the primary heat exchanger 12 is connected with the water inlet of the secondary heat exchanger 13, and the water outlet of the secondary heat exchanger 13 is connected with the spray pipe of the final rinsing section 74.

In order to ensure the cleanliness of rinsing, the final rinsing section is externally connected with water supply equipment through a pipeline to supply purified water for spray rinsing, the purified water at the supply point is generally at room temperature, and the externally supplied purified water needs to be heated in order to ensure the cleaning effect. The primary heat exchanger 12 arranged at the exhaust system 11 can exchange heat with steam in the exhaust system 11 to raise the temperature of purified water in the heat exchanger pipe; meanwhile, the temperature of steam in the exhaust system 11 can be reduced through heat exchange, the outflow of the steam is reduced, and the discharge of cleaning liquid is reduced.

The spray cleaning equipment also comprises a cleaning tank 53 and a rinsing tank 75; the cleaning tank 53 is arranged at the bottom of the cleaning section; the bottoms of the cleaning tank 53 and the rinsing tank 75 are both obliquely arranged; the rinsing tank 53 comprises a pre-rinsing tank, a secondary rinsing tank and a final rinsing tank which are sequentially and adjacently arranged and sequentially increased, and a water outlet is formed in the lowest position of the pre-rinsing tank. The secondary heat exchanger 13 is arranged in the pre-rinsing tank and is close to the water outlet.

A liquid level sensor and a heating device are arranged in the rinsing tank 75; the rinsing section is supplied with water from a rinsing tank 75, and spray water of the rinsing section flows back to the rinsing tank 75; the pre-rinsing section is supplied with water by a pre-rinsing tank, and spray water of the pre-rinsing section flows back to the pre-rinsing tank.

By adopting the technical scheme, the purified water in the rinsing tank 75 is heated by using the heating device, the spraying temperature supplied to the pre-rinsing section 71, the rinsing I section 72 and the rinsing II section 73 is ensured, and the cleaning effect is ensured. Rinsing water enters the rinsing tank 75 by spraying, then sequentially flows into the final rinsing tank and the pre-rinsing tank in an overflow mode, and then is discharged from the water outlet; the temperature of water discharged from the water outlet is still higher, and a secondary heat exchanger is arranged at a position close to the water outlet, so that the purified water outside through the primary heat exchange is heated again, and the secondary heat exchanger 13 is connected with a rinsing spray pipe, thereby ensuring the cleaning effect of final rinsing.

As shown in fig. 4-5, the spray cleaning device further comprises a liquid storage tank 10, the liquid storage tank is formed by welding stainless steel plates, heat insulation cotton is arranged outside the liquid storage tank 10, and the liquid storage tank 10 is connected with the cleaning tank 53 and the rinsing tank 75; the liquid storage tank 10 is internally provided with a slag receiving net, a water inlet pipe, a water discharging pipe and a pump suction port, and the bottom of the liquid storage tank 10 is provided with a stainless steel heating pipe, a temperature control heating system, a liquid level detection sensor and a liquid level abnormity acousto-optic alarm device.

Due to the volatilization of water, the cleaning liquid/rinsing liquid (DI water) inevitably comes out by the parts repeatedly entering and exiting the cleaning tank 53, and the overflowing cleaning liquid causes the cleaning liquid/rinsing liquid (DI water) in the cleaning tank 53 to be lost, so the liquid storage tank 10 is provided with a liquid level sensor, and the automatic liquid supplementing function is realized. When the liquid level is abnormal, the liquid level sensor sends out an alarm signal.

The spray cleaning equipment further comprises a circulating filter 110 and a plurality of water pumps 120, wherein the circulating filter 110 is connected with the cleaning tank 53. The spraying cleaning equipment also comprises a liquid receiving disc, and the liquid receiving disc is arranged at the bottom of the rack 1; the rack also comprises a plurality of access doors.

The spraying and cleaning equipment further comprises an electrical control system 150, wherein the electrical control system is positioned in an electrical control system box and is electrically connected with the feeding section 2, the discharging section 3, the liquid level sensor and the temperature control heating system.

Example 2:

for an application example of the cleaning step of the spray cleaning device described in the present application, as shown in fig. 8, a spray cleaning method includes the following steps:

s1: feeding; conveying the piece to be cleaned into a spray cleaning machine by a conveying net belt; the feeding interface has a plate feeding detection function, when no plate enters in more than 3min (time is adjustable), the equipment automatically enters a standby state, the spraying pump and the fan stop working, and the operation cost of the equipment is saved.

S2: pre-cleaning; nozzles are respectively arranged above and below the spraying cavity, and all the nozzles spray high-pressure cleaning liquid to clean the workpiece; the pressure of the water pump is 0.2-0.5Mpa;

s3: strongly cleaning; the upper part and the lower part of the spraying cavity are respectively provided with a nozzle, all the nozzles spray high-pressure cleaning liquid to clean the workpiece, and the pressure of a water pump is 0.4-0.7Mpa; nozzles are respectively arranged at the upper part and the lower part of the spraying cavity, and all the nozzles spray high-pressure cleaning liquid to clean the workpiece; and the cleaned cleaning liquid is collected by the liquid receiving tank and then flows back to the cleaning liquid storage tank for circular filtration and heating. The heating system adopts a PID control system, digital display is realized, the control precision is high, and an overtemperature protection device is arranged.

S4: wind cutting isolation; the high-pressure fan is used for blowing off the liquid on the workpiece through the air cutting of the upper air knife and the lower air knife, so that the double effects of separating the cleaning liquid, saving the cost and improving the rinsing effect are achieved;

s5: pre-rinsing; a row of nozzles are respectively arranged above and below the spraying cavity, and all the nozzles spray high-pressure DI water to pre-rinse the workpiece; a row of nozzles are respectively arranged above and below the spraying cavity, and all the nozzles spray high-pressure DI water to pre-rinse the workpiece; the DI water after the pre-rinsing is directly discharged, so that the subsequent rinsing DI water has lower concentration, and the subsequent rinsing effect is ensured.

S6: rinsing I; nozzles are respectively arranged above and below the spraying cavity, and all the nozzles spray high-pressure DI water to rinse the workpiece;

s7: rinsing II; nozzles are respectively arranged at the upper part and the lower part of the spraying cavity, and all the nozzles spray high-pressure DI water to further rinse the workpiece; nozzles are respectively arranged at the upper part and the lower part of the spraying cavity, and all the nozzles spray high-pressure DI water to rinse the workpiece; and the rinsed DI water is collected by the liquid receiving tank, flows back to enter a rinsing liquid storage tank for heating, overflows step by step through the rinsing liquid storage tank, and is subjected to circulating filtration through a deionized water device. The heating system adopts a PID control system, digital display is realized, the control precision is high, and an overtemperature protection device is arranged.

S8: final rinsing; DI water introduced from the outside of the equipment is pressurized by a booster pump, and then the workpiece is finally rinsed through an upper row of nozzles and a lower row of nozzles of a spraying cavity; DI water introduced from the outside of the device is pressurized by a booster pump, the workpiece is subjected to final rinsing through an upper row of nozzles and a lower row of nozzles of a spraying cavity, and the DI water subjected to final rinsing flows back to a rinsing liquid storage tank after being collected by a liquid receiving tank.

S9: cutting water by an air knife; the air cutting system mainly utilizes a high-pressure fan to blow off liquid on the workpiece through air cutting of an upper air knife and a lower air knife so as to achieve the aim of drying;

s10: drying by hot air circulation; the hot air circulation drying system adds the heating bag into the air cutting system, so that the air cutting temperature is increased, and the aim of accelerating drying is fulfilled;

s11: blanking; the conveying net belt sends the piece to be cleaned out of the spray cleaning machine.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A spray cleaning device comprises a rack, a cleaning section, a wind cutting isolation section, a rinsing section and a drying section; the spraying cleaning equipment is characterized by also comprising a heat exchange system and an internal circulation exhaust system; the heat exchange system comprises a primary heat exchanger and a secondary heat exchanger; the internal circulation exhaust system is arranged on the drying section; and isolation curtains are arranged among the cleaning section, the wind cutting isolation section, the rinsing section and the drying section.

2. The spray cleaning device according to claim 1, further comprising a loading section and a unloading section respectively located at two ends of the spray cleaning device; a conveying mesh belt penetrating through the spray cleaning equipment is connected between the feeding section and the discharging section; the conveying mesh belt is sequentially provided with a cleaning section, a rinsing section and a drying section; the wind cutting isolation sections are two in number and are respectively arranged between the cleaning section and the rinsing section as well as between the rinsing section and the drying section.

3. The spray cleaning device of claim 2, wherein the cleaning section comprises a cleaning tank body and a pre-cleaning section, a cleaning I section and a cleaning II section which are positioned in the cleaning tank body; the rinsing section comprises a rinsing box body, and a pre-rinsing section, a rinsing I section, a rinsing II section and a final rinsing section which are positioned in the rinsing box body; the drying section comprises a drying box body and a hot air drying section positioned in the drying box body; and an upper row of spray pipes and a lower row of spray pipes are arranged in the cleaning section and the rinsing section.

4. The spray cleaning device according to claim 3, further comprising two high pressure fans, wherein the wind-cut isolation section and the drying section are respectively connected with the high pressure fans; the drying section is also provided with a heating bag; the internal circulation exhaust system comprises a plurality of direct current variable frequency fans and an exhaust pipeline, and a plurality of latticed vents are arranged on the exhaust pipeline; the direct current frequency conversion fan inlet scoop be in and connect high pressure positive blower, air outlet department is located the top of frame.

5. The spray cleaning device of claim 4, wherein a primary heat exchanger is disposed in the exhaust duct adjacent to the top of the cleaning section; the water inlet of the first-stage heat exchanger is connected with external water supply equipment, the water outlet of the first-stage heat exchanger is connected with the water inlet of the second-stage heat exchanger, and the water outlet of the second-stage heat exchanger is connected with the rinsing section spray pipe.

6. The spray cleaning apparatus of claim 5, further comprising a cleaning tank and a rinse tank; the cleaning tank is arranged at the bottom of the cleaning section; the bottoms of the cleaning tank and the rinsing tank are obliquely arranged; the rinsing tank comprises a pre-rinsing tank, a secondary rinsing tank and a final rinsing tank which are sequentially and adjacently arranged and sequentially increased, and a water outlet is formed in the lowest position of the pre-rinsing tank; the secondary heat exchanger is arranged in the pre-rinsing tank and is close to the water outlet.

7. The spray cleaning device according to claim 6, characterized in that a liquid level sensor and a heating device are arranged in the rinsing tank; the rinsing section is supplied with water by a rinsing tank, and spray water of the rinsing section flows back to the rinsing tank; the pre-rinsing section is supplied with water by a pre-rinsing groove, and spray water of the pre-rinsing section flows back to the pre-rinsing groove.

8. The spray cleaning device of claim 7 further comprising a tank connected to said cleaning tank and rinse tank; the liquid storage tank is internally provided with a slag receiving net, a water inlet pipe, a water discharge pipe and a pump suction port, and the bottom of the liquid storage tank is provided with a stainless steel heating pipe, a temperature control heating system, a liquid level detection sensor and a liquid level abnormity acousto-optic alarm device.

9. The spray cleaning device according to claim 8, further comprising a liquid receiving tray, a circulation filter and a plurality of water pumps, wherein the circulation filter is connected with the cleaning tank; the water pump is respectively connected with the cleaning section and the rinsing section; the liquid receiving disc is arranged at the bottom of the frame and is connected with the cleaning tank and the rinsing tank; the rack also comprises a plurality of access doors.

10. A spray cleaning method, applicable to a spray cleaning apparatus according to any one of claims 1 to 9, comprising the steps of:

s1: feeding; conveying the piece to be cleaned into a spray cleaning machine by a conveying net belt;

s2: pre-cleaning; nozzles are respectively arranged at the upper part and the lower part of the spraying cavity, and all the nozzles spray high-pressure cleaning liquid to clean the workpiece; the pressure of the water pump is 0.2-0.5Mpa;

s3: strongly cleaning; the upper part and the lower part of the spraying cavity are respectively provided with a nozzle, all the nozzles spray high-pressure cleaning liquid to clean the workpiece, and the pressure of a water pump is 0.4-0.7Mpa;

s4: wind cutting isolation; the high-pressure fan is used for blowing off the liquid on the workpiece through the air cutting of the upper air knife and the lower air knife, so that the double effects of separating the cleaning liquid, saving the cost and improving the rinsing effect are achieved;

s5: pre-rinsing; a row of nozzles are respectively arranged above and below the spraying cavity, and all the nozzles spray high-pressure DI water to pre-rinse the workpiece;

s6: rinsing I; nozzles are respectively arranged at the upper part and the lower part of the spraying cavity, and all the nozzles spray high-pressure DI water to rinse the workpiece;

s7: rinsing II; nozzles are respectively arranged at the upper part and the lower part of the spraying cavity, and all the nozzles spray high-pressure DI water to further rinse the workpiece;

s8: final rinsing; DI water introduced from the outside of the equipment is pressurized by a booster pump, and then the workpiece is finally rinsed through an upper row of nozzles and a lower row of nozzles of a spraying cavity;

s9: cutting water by an air knife; the air cutting system mainly utilizes a high-pressure fan to blow off liquid on the workpiece through air cutting of an upper air knife and a lower air knife so as to achieve the aim of drying;

s10: drying by hot air circulation; the hot air circulation drying system adds the heating bag into the air cutting system, so that the air cutting temperature is increased, and the aim of accelerating drying is fulfilled;

s11: blanking; the conveying net belt sends the piece to be cleaned out of the spray cleaning machine.

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