A kind of disassembly-free cleaning plate heat exchanger

Abstract

The utility model provides a kind of dismantling-free cleaning plate heat exchanger, belong to heat exchanger equipment technical field.The technical scheme of the dismantling-free cleaning plate heat exchanger is, including heat exchanger body, still including cleaning liquid tank body and ultrasonic wave generating mechanism, heat exchanger body includes hot side port and cold side port, cleaning liquid tank body includes the storage cavity containing cleaning liquid, with the liquid outlet and liquid inlet of storage cavity and circulation pressurizing module, liquid outlet is communicated with hot side port or cold side port by first pipe line, liquid inlet is communicated with cold side port or hot side port by second pipe line, second pipe line is connected with filter mechanism, filter mechanism is at least used to filter the impurity in cleaning liquid, ultrasonic wave generating mechanism is connected on the outside wall of heat exchanger body.The utility model is switched first, second pipe line connection mode, independently controls cold / heat side cleaning path, and different types of dirt in hot side and cold side are handled pertinently.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger equipment technology, and in particular to a plate heat exchanger that does not require disassembly for cleaning. Background Technology

[0002] Plate heat exchangers, as highly efficient heat exchange equipment, are widely used in industrial fields such as chemical engineering, food processing, refrigeration and air conditioning, and metallurgy. They achieve heat exchange between hot and cold fluids through the close stacking of corrugated plates, offering significant advantages such as high heat transfer coefficients, compact structure, and small footprint. However, during long-term operation, minerals, organic matter, microorganisms, and mechanical impurities in the fluid easily deposit on the plate surface, forming fouling layers such as scale, grease, biological slime, or metal corrosion products. These fouling layers not only increase thermal resistance, leading to a decrease in heat exchange efficiency, but may also cause problems such as increased fluid pressure drop and increased flow resistance. In severe cases, shutdown for cleaning may be necessary, affecting production continuity and increasing energy costs.

[0003] Existing plate heat exchanger cleaning technologies are mainly divided into two categories: disassembly cleaning and non-disassembly cleaning. Traditional disassembly cleaning requires loosening the plate bundle clamping bolts, disassembling the plates one by one, and then mechanically scrubbing or chemically soaking them. Although the cleaning is relatively thorough, the process is cumbersome and time-consuming. At the same time, frequent disassembly can easily lead to aging of the sealing gaskets, deformation or damage of the plates, and increased equipment maintenance costs. To solve the disassembly problem, existing non-disassembly cleaning technologies mostly use a combination of circulating cleaning fluid and ultrasonic vibration. For example, the cleaning device disclosed in patent document CN104764359A uses a pump to drive the cleaning agent to circulate between the plate heat exchanger and the storage tank, and uses an ultrasonic transducer to generate vibration to assist in descaling.

[0004] However, existing non-disassembly cleaning technologies are insufficient for cleaning the cold / hot sides of plate heat exchangers. Due to differences in fluid properties between the cold and hot sides of plate heat exchangers (e.g., high temperatures on the hot side easily lead to coking, while low temperatures on the cold side easily promote microbial growth), the types and degrees of fouling often differ. Existing devices mostly use a single circulation pipeline, making it impossible to independently control the cleaning paths and parameters for the cold and hot sides, leading to inefficient cleaning or over-cleaning. Furthermore, existing devices lack effective filtration; during the cleaning process, detached dirt particles, metal shavings, and other impurities repeatedly circulate with the cleaning fluid, potentially causing secondary scratches on the plates or pipe blockages. Simultaneously, the contaminated cleaning fluid requires frequent replacement, increasing consumable waste and processing costs. Utility Model Content

[0005] This invention addresses the problems of existing plate heat exchanger cleaning devices that lack specificity for cleaning the cold / hot sides of the heat exchanger and lack effective filtration, resulting in low cleaning efficiency. It proposes a plate heat exchanger cleaning device that does not require disassembly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a non-disassembly cleaning plate heat exchanger, including a heat exchanger body, a cleaning fluid tank, and an ultrasonic generator. The heat exchanger body includes a hot-side port and a cold-side port. The cleaning fluid tank includes a storage cavity for containing cleaning fluid, an outlet and an inlet connected to the storage cavity, and a circulation pressurization module. The circulation pressurization module is used at least to pressurize the cleaning fluid in the storage cavity and output it from the outlet. The outlet is connected to the hot-side port or the cold-side port through a first pipeline, and the inlet is connected to the cold-side port or the hot-side port through a second pipeline. The second pipeline is connected to a filter mechanism, which is used at least to filter impurities in the cleaning fluid. The ultrasonic generator is connected to the outer wall of the heat exchanger body.

[0008] Furthermore, the filtration mechanism includes a filtration chamber and a first inlet and a first outlet connected to the filtration chamber. The filtration chamber is equipped with a filter element. The first inlet is connected to one end of the second pipeline, and the first outlet is connected to the liquid inlet.

[0009] Furthermore, the filter element includes a support plate and a filter medium stacked together. The support plate has multiple liquid inlets, which are connected to the first outlet, and the filter medium is positioned facing the first inlet.

[0010] Furthermore, the filter media includes one or both of filter cotton and filter cloth.

[0011] Furthermore, the liquid inlet is provided with a first connecting flange, the filter mechanism is connected to the first connecting flange, one end of the second pipeline is connected to the first connecting flange and communicates with the first inlet.

[0012] Furthermore, the circulating pressurization module includes a pressurization pump body, a second inlet and a second outlet. A mounting bracket is provided inside the storage chamber. The pressurization pump body is fixedly connected to the mounting bracket, and there is an anti-clogging gap between the mounting bracket and the bottom wall of the storage chamber. The second inlet is connected to the storage chamber, and the second outlet is connected to the liquid outlet.

[0013] Furthermore, the distance between the second inlet and the bottom wall of the storage cavity is 5-10 cm.

[0014] Furthermore, a filter screen is connected to the second inlet port.

[0015] Furthermore, the heat exchanger body also includes a three-way connecting pipe 1 and a three-way connecting pipe 2. The first port of the three-way connecting pipe 1 is connected to the hot side port, the second port is at least used for material passage, and the third port is connected to one end of the first pipeline or the second pipeline. The first port of the three-way connecting pipe 2 is connected to the cold side port, the second port is at least used for material passage, and the third port is connected to one end of the second pipeline or the first pipeline.

[0016] Furthermore, ball valves are connected to the three ports of both the first and second tee connectors, and one end of the first or second pipe is connected to the ball valve.

[0017] Furthermore, the heat exchanger body also includes a material pipe body, and a second connecting flange is provided at both the first and second tee connection pipes. One end of the material pipe body is connected to the second connecting flange.

[0018] Furthermore, the heat exchanger body also includes a control system. The ultrasonic generating mechanism and the circulating pressurization module are both connected to the control system. The control system is used to control the opening and closing of the ultrasonic generating mechanism and the opening and closing of the circulating pressurization module.

[0019] As can be seen from the above technical solutions, the advantages of this utility model are:

[0020] This invention, through the design of a cleaning fluid circulation system and an ultrasonic generator, enables thorough removal of dirt without disassembling the plates. By switching the connection methods of the first and second pipelines, the cleaning paths on the cold and hot sides can be independently controlled, allowing for targeted treatment of different types of dirt on the hot and cold sides, effectively avoiding the problem of cleaning fluid dilution caused by traditional single-loop cleaning. A filtration mechanism is installed between the second pipeline and the inlet to filter the returned cleaning fluid, ensuring its cleanliness. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the heat exchanger body in one embodiment of the present invention;

[0023] Figure 2 This is a partial cross-sectional schematic diagram of the filtering mechanism in one embodiment of the present invention;

[0024] Figure 3 This is a partial cross-sectional view of the cleaning fluid tank in one embodiment of the present invention.

[0025] Explanation of key figure labels:

[0026] 100. Heat exchanger body; 110. Hot side port; 120. Cold side port; 200. Cleaning fluid tank; 210. Storage chamber; 211. Mounting bracket; 220. Outlet; 230. Inlet; 231. First connecting flange; 240. Circulation pressurization module; 241. Pressurization pump body; 242. Second inlet; 2421. Filter screen; 243. Second outlet; 300. Ultrasonic generating mechanism; 400 500. First pipeline; 600. Second pipeline; 610. Filtering mechanism; 620. Filter chamber; 630. First inlet; 640. Filter element; 641. Support plate; 6411. Liquid inlet; 642. Filter medium; 710. T-connector pipe one; 720. T-connector pipe two; 730. Ball valve; 740. Material pipe body; 750. Second connecting flange; 800. Control system. Detailed Implementation

[0027] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0028] Please see Figures 1-3 A non-disassembly cleaning plate heat exchanger includes a heat exchanger body 100, a cleaning fluid tank 200, and an ultrasonic generator 300. The heat exchanger body 100 includes a hot-side port 110 and a cold-side port 120. The cleaning fluid tank 200 includes a storage cavity 210 for containing cleaning fluid, an outlet 220 and an inlet 230 connected to the storage cavity 210, and a circulation pressurization module 240. The circulation pressurization module 240 is used at least to pressurize the cleaning fluid in the storage cavity 210 and output it from the outlet 220. The outlet 220 is connected to the hot-side port 110 or the cold-side port 120 through a first pipeline 400. The inlet 230 is connected to the cold-side port 120 or the hot-side port 110 through a second pipeline 500. The second pipeline 500 is connected to a filter mechanism 600, which is used at least to filter impurities in the cleaning fluid. The ultrasonic generator 300 is connected to the outer wall of the heat exchanger body 100.

[0029] In this embodiment, as Figure 1As shown, the heat exchanger body 100 is composed of multiple corrugated plates stacked together, forming channels for hot and cold fluids. A hot-side port 110 and a cold-side port 120 are respectively located on the upper and lower sides of one end of the heat exchanger body 100. The hot-side port 110 is the inlet and outlet for high-temperature fluids, and the cold-side port 120 is the inlet and outlet for low-temperature fluids. The plates are made of stainless steel or titanium alloy, and the corrugated surface design enhances turbulence and improves heat exchange efficiency. The cleaning fluid tank 200 is a cylindrical or square sealed container with a hollow internal structure forming a storage cavity 210 for storing the cleaning fluid. Its capacity is designed according to the heat exchanger size (typically 50-500L). The outlet 220 is located at the top of the cleaning fluid tank 200, and the inlet 230 is located at the bottom. A circulation pressurization module 240 is also provided inside the cleaning fluid tank 200 to pressurize the cleaning fluid in the storage cavity 210 and output it through the outlet 220. Furthermore, the first pipeline 400 can be a stainless steel pipe, with one end connected to the outlet 220 of the cleaning fluid tank 200 and the other end connected to the hot side port 110 or the cold side port 120 of the heat exchanger body 100, thus supplying the cleaning fluid to the cleaning fluid tank 200. The cleaning fluid enters the heat exchanger body 100 through the hot side port 110 or the cold side port 120. Correspondingly, the second pipeline 500 is also a stainless steel pipe, one end of which is connected to the liquid inlet 230 of the cleaning fluid tank 200, and the other end can be connected to the cold side port 120 and the hot side port 110 of the heat exchanger body 100. Thus, the cleaning fluid after the cleaning work is completed can be returned to the cleaning fluid tank 200 through the cold side port 120 or the hot side port 110, thereby forming a circulation pipeline. A filter mechanism 600 is also provided between the second pipeline 500 and the liquid inlet 230. The filter mechanism 600 can effectively filter impurities in the cleaning fluid that returns from the second pipeline 500 to the cleaning fluid tank 200, so as to ensure the cleanliness of the returned cleaning fluid. In addition, the ultrasonic generator 300 is fixed to the outer wall of the heat exchanger body 100 by bolts or adhesive. When the cleaning fluid enters the heat exchanger body 100, the ultrasonic generator 300 is turned on to generate ultrasonic vibration, which causes the cleaning fluid to form a cavitation effect inside the heat exchanger body 100, thereby enhancing the cleaning effect.

[0030] In actual work process:

[0031] Preparation stage: Close the material inlet and outlet valves of the heat exchanger body 100, connect one end of the first pipeline 400 to the hot side port 110, and connect one end of the second pipeline 500 to the cold side port 120 (forming a "hot in, cold out" loop), and inject an appropriate amount of cleaning fluid (such as 5% citric acid solution or special cleaning agent) into the storage chamber 210.

[0032] Circulation cleaning stage: The circulation pressurization module 240 is activated to extract the cleaning fluid from the storage chamber 210 and deliver it to the hot side port 110 of the heat exchanger via the first pipeline 400. The cleaning fluid flows between the plates, dissolving and removing dirt. The cleaning fluid carrying impurities flows out from the cold side port 120 and enters the second pipeline 500. When the cleaning fluid flows through the filter mechanism 600, the impurities are intercepted by the filter element. The cleaned cleaning fluid is returned to the storage chamber 210 for recycling. At the same time, the ultrasonic generator 300 is activated, and the cavitation effect generated by the ultrasonic vibration accelerates the removal of dirt.

[0033] Mode switching phase: After the hot side cleaning time is set, for example, after cleaning for 30 minutes, turn off the circulation pressurization module 240 and the ultrasonic generator 300, and then adjust the pipeline connection, switching one end of the first pipeline 400 to the cold side port 120 and one end of the second pipeline 500 to the hot side port 110 (forming a "cold in, hot out" loop), repeat the above circulation cleaning steps, and perform special cleaning for the cold side (such as biological slime removal).

[0034] After cleaning, drain the cleaning fluid from the storage chamber 210, rinse the pipelines and filter mechanism 600 with clean water, restore the material inlet and outlet valves of the heat exchanger, and restart the production process.

[0035] In the above structure, by setting up a cleaning fluid circulation system and an ultrasonic generator, dirt can be thoroughly removed without disassembling the plates. The ultrasonic generator 300 and the circulation pressurization module 240 work together to effectively improve cleaning efficiency and effect. Furthermore, by switching the connection methods of the first and second pipelines 500, the cold / hot side cleaning paths can be independently controlled, allowing for targeted treatment of different types of dirt on the hot and cold sides, effectively avoiding the problem of cleaning fluid concentration dilution caused by traditional single-loop cleaning. By setting a filter mechanism 600 between the second pipeline 500 and the inlet 230, the returned cleaning fluid can be filtered, ensuring its cleanliness, thereby increasing the number of cleaning fluid circulations and reducing secondary wear on the plates caused by impurities in the returned cleaning fluid, extending the service life of the heat exchanger.

[0036] In the specific structure of the filtration mechanism 600, the filtration mechanism 600 includes a filtration chamber 610 and a first inlet 620 and a first outlet 630 connected to the filtration chamber 610. The filtration chamber 610 is provided with a filter element 640. The first inlet 620 is connected to one end of the second pipeline 500, and the first outlet 630 is connected to the liquid inlet 230.

[0037] In this embodiment, as Figure 2As shown, the filter mechanism 600 can be a cylindrical or cuboid structure. The interior of the filter mechanism 600 is hollow, forming a filter cavity 610. The filter mechanism 600 has a first inlet 620 and a first outlet 630 at opposite ends, respectively, communicating with the filter cavity 610. The first inlet 620 is located at the lower end of the filter cavity 610, and the first outlet 630 is located at the upper end of the filter cavity 610. This allows the cleaning fluid to enter from the bottom inlet and pass through the filter element 640 from bottom to top, where impurities are intercepted. Below 40, to improve the filtration effect, one end of the second pipeline 500 is connected to the first inlet 620, and the first outlet 630 is connected to the inlet 230 of the cleaning fluid tank 200. A filter element 640 is provided inside the filtration mechanism 600. After the cleaning work is completed, the cleaning fluid enters the second pipeline 500, enters the filter chamber 610 through the first inlet 620, and after being filtered by the filter element 640, it flows back to the cleaning fluid tank 200 through the first outlet 630 and the inlet 230.

[0038] By installing a filter element 640 inside the filter chamber 610, impurities are effectively intercepted and filtered, improving the cleanliness of the returned cleaning fluid and thus increasing the service life of the cleaning fluid.

[0039] Specifically, the filter element 640 includes a support plate 641 and a filter medium 642 stacked together. The support plate 641 is provided with a plurality of liquid inlets 6411, which are connected to the first outlet 630. The filter medium 642 is disposed facing the first inlet 620. The filter medium 642 includes one or both of filter cotton and filter cloth.

[0040] In this embodiment, the support plate 641 is a circular or rectangular plate structure with a surface treated to increase friction, such as by drawing fibers, to prevent the filter medium 642 from sliding. The liquid inlets 6411 are circular or oblong holes, and multiple liquid inlets 6411 are evenly distributed in a honeycomb pattern to ensure smooth flow of the cleaning fluid. The support plate 641 is fixed to the inner wall of the filter chamber 610 by bolts or by a snap-fit ​​installation. The filter medium 642 includes filter cotton or filter cloth. The filter cotton can be made of polyester fiber or polypropylene fiber, with a density of 10-100 kg / m³, a thickness of 5-20 mm, and a filtration accuracy of 1-100 μm. The high-loft structure provides a large specific surface area (1-5 m² / g) for adsorbing fine particles (such as colloids and microorganisms). The filter cloth can be made of polypropylene, polyester or nylon, and the weaving method includes plain weave, twill weave or satin weave. The filtration accuracy is 5-100μm. The filter medium 642 can adopt a single-layer structure, that is, using filter cotton or filter cloth alone, or a composite structure, that is, filter cotton on the top layer and filter cloth on the bottom layer, or a multi-layer alternating structure, that is, filter cotton and filter cloth are alternately stacked to enhance the depth filtration effect, which is suitable for high turbidity cleaning liquids.

[0041] The filter element 640 is vertically installed in the filter chamber 610. The edge of the filter medium 642 is fixed to the edge of the support plate 641 by an elastic sealing ring or a stainless steel pressure ring to ensure no liquid bypass leakage. The support plate 641 provides support for the filter medium 642. The filter medium 642 faces upward and the support plate 641 is directly opposite the first outlet 630, so that the cleaning liquid first passes through the filter medium 642 and then flows out through the liquid outlet 6411 of the support plate 641, ensuring that impurities are intercepted on the surface and inside of the filter medium 642.

[0042] In the above structure, by setting a support plate 641 and a filter medium 642, the support plate 641 provides support for the filter medium 642. The support plate 641 can withstand the instantaneous impact of the cleaning liquid, effectively preventing the filter medium 642 from shifting. The filter medium 642 is a structure of filter cotton and / or filter cloth, which can further improve the filtration effect.

[0043] In addition, the liquid inlet 230 is provided with a first connecting flange 231, the filter mechanism 600 is connected to the first connecting flange 231, one end of the second pipeline 500 is connected to the first connecting flange 231 and communicates with the first inlet 620.

[0044] In this embodiment, as Figure 1 As shown, the first connecting flange 231 is made of stainless steel or carbon steel, and its outer diameter is larger than that of the inlet 230. Its sealing surface is flat or raised, with O-ring grooves and an internal sealing ring. The surface of the first connecting flange 231 has 4-8 bolt holes evenly distributed to ensure sufficient connection stability. The first outlet 630 of the filter mechanism 600 has a connecting plate that matches the first connecting flange 231, and the two are rigidly connected by a bolt group. After the first outlet 630 and the inlet 230 are connected by the flange, a straight flow channel is formed. One end of the second pipeline 500 is then connected to the first inlet 620.

[0045] In the above structure, the filter mechanism 600 and the cleaning fluid tank 200 are connected by the first connecting flange 231, which facilitates installation and disassembly, improves loading and unloading efficiency, and can be reused after disassembly, improving positioning accuracy, avoiding leakage risk caused by installation deviation, effectively improving sealing effect and preventing leakage.

[0046] In the specific structure of the circulating pressurization module 240, the circulating pressurization module 240 includes a pressurization pump body 241, a second inlet 242, and a second outlet 243. A mounting bracket 211 is provided inside the storage chamber 210. The pressurization pump body 241 is fixedly connected to the mounting bracket 211, and there is an anti-clogging gap between the mounting bracket 211 and the bottom wall of the storage chamber 210. The second inlet 242 communicates with the storage chamber 210, and the second outlet 243 communicates with the liquid outlet 220. The distance between the second inlet 242 and the bottom wall of the storage chamber 210 is 5-10 cm. A filter screen 2421 is connected to the port of the second inlet 242.

[0047] In this embodiment, as Figure 3 As shown, a mounting bracket 211 is provided in the storage chamber 210. The mounting bracket 211 is an L-shaped stainless steel bracket with a waist-shaped hole in the horizontal plate and a vertical plate welded to the bottom wall of the storage chamber 210. The anti-clogging gap formed between the mounting bracket 211 and the bottom wall ensures that the sediment will not accumulate below the pump body and avoid clogging the second inlet 242. The pressurizing pump body 241 is rigidly connected to the mounting bracket 211 via bolts through the waist-shaped hole on the horizontal plate. The base is equipped with shock-absorbing rubber pads to reduce vibration transmission. The second inlet 242 of the circulating pressurizing module 240 can be a short pipe structure with a filter screen 2421 at the port. The opening height of the second inlet 242 is 5-10cm away from the bottom wall of the storage chamber 210, thereby further preventing impurities deposited in the storage chamber 210 from entering the pressurizing pump body 241 through the second inlet 242 and damaging the pressurizing pump body 241. The second outlet 243 of the circulating pressurizing module 240 is connected to the liquid outlet 220 through a reducing short pipe. In addition, a lifting check valve is provided at the liquid outlet 220 to prevent the cleaning fluid from flowing back and damaging the pump body.

[0048] In the above structure, by mounting the circulating pressurization module 240 inside the cleaning fluid tank 200 with the mounting bracket 211, and integrating it with the cleaning fluid tank 200, the integration effect of the plate heat exchanger is improved, and the ease of use is enhanced. In addition, a certain distance is provided between the mounting bracket 211 and the bottom wall of the storage chamber 210, and between the second inlet 242 and the bottom wall of the storage chamber 210, which can effectively prevent sediment impurities in the storage chamber 210 from entering the pressurization pump body 241, thereby preventing blockage and damage to the pressurization body, and thus improving the delivery efficiency of the cleaning fluid.

[0049] In the specific connection structure of the first pipeline 400 and the second pipeline 500, the heat exchanger body 100 also includes a three-way connecting pipe 1 710 and a three-way connecting pipe 2 720. Port 1 of the three-way connecting pipe 1 710 is connected to the hot side port 110, port 2 is at least for material passage, and port 3 is connected to one end of the first pipeline 400 or the second pipeline 500. Port 1 of the three-way connecting pipe 2 720 is connected to the cold side port 120, port 2 is at least for material passage, and port 3 is connected to one end of the second pipeline 500 or the first pipeline 400. Ball valves 730 are connected to the three ports of both the three-way connecting pipe 1 710 and the three-way connecting pipe 2 720, and one end of the first pipeline 400 or the second pipeline 500 is connected to the ball valve 730.

[0050] In this embodiment, as Figure 1 As shown, both tee connector 710 and tee connector 720 can be made of seamless stainless steel pipe, with their outer diameter matching that of the hot / cold side port 120. The tees are of equal diameter and the bifurcation angle is 90°. Pipe port 1 is connected to the hot / cold side port 120 via flange or welding, with a raised sealing surface and O-ring grooves. Pipe port 2 connects to the material pipeline, with the same interface as pipe port 1, and includes a removable filter screen 2421 to prevent foreign objects from entering the heat exchanger. A valve structure can also be installed at pipe port 2. Pipe port 3 connects to a ball valve 730, using socket welding or threaded connection. Both the first pipeline 400 and the second pipeline 500 can be made of seamless stainless steel pipe and connected to the ball valve 730 via flange or quick-connect structure.

[0051] When materials need to pass through, the ball valve 730 closes port three, and port one connects to port two, allowing materials (such as hot water or refrigerant) to pass through the heat exchanger. When cleaning is required, the valve structure closes port two, and port one connects to port three, allowing cleaning fluid to enter the heat exchanger.

[0052] In the above structure, the hot / cold side port 120, the first and second pipelines 500 and the material pipeline are connected by a three-way structure, and the material circuit and cleaning circuit can be quickly switched by operating two ball valves, thereby improving work efficiency.

[0053] In addition, the heat exchanger body 100 also includes a material pipe body 740, a second connecting flange 750 at both the first tee connecting pipe 710 and the second tee connecting pipe port, and one end of the material pipe body 740 is connected to the second connecting flange 750.

[0054] In this embodiment, the second connecting flange 750 can be made of stainless steel or carbon steel, with an outer diameter twice that of the pipe opening. It adopts a raised face or full-face sealing form, with a sealing ring embedded in the sealing groove. The surface of the second connecting flange 750 has 4-12 bolt holes evenly distributed. The material pipe body 740 is made of seamless stainless steel, and one section of the material pipe body 740 has a flange structure that mates with the second connecting flange 750, and is bolted to the second connecting flange 750. By setting the second connecting flange 750, standardized connection is achieved, compatibility is improved, connection sealing is enhanced, and maintenance and replacement are convenient.

[0055] In addition, the heat exchanger body 100 also includes a control system 800, and the ultrasonic generating mechanism 300 and the circulating pressurization module 240 are all connected to the control system 800. The control system 800 is used to control the opening and closing adjustment of the ultrasonic generating mechanism 300 and the opening and closing adjustment of the circulating pressurization module 240.

[0056] In this embodiment, the control system 800 can adopt existing technology. The control system 800 includes a controller, an operating interface, and a sensor module. The controller can be a Siemens S7-1200 PLC or a Mitsubishi FX5U series PLC. The controller is connected to the ultrasonic generator 300 and the circulating pressurization module 240. The operating interface can be a 7-inch color touchscreen (such as a Weintek MT8071iE), supporting touch operation and parameter setting, with an IP65 protection rating. The sensor module includes a pressure sensor, a temperature sensor, and a liquid level sensor. The pressure sensor is installed at the second inlet 242 and the second outlet 243 of the circulating pressurization module 240. The temperature sensor is installed in the cleaning fluid circuit, and the liquid level sensor monitors the liquid level in the storage chamber 210.

[0057] During actual operation, initialization involves the system self-checking sensor status and liquid level (automatically replenishing water if the liquid level is below the set value). The ultrasonic generator 300 and the circulating pressurization module 240 are in standby mode. Cleaning parameters can then be set via the touchscreen, followed by starting the circulating pressurization module 240. The pressure sensor provides real-time pressure feedback, and the system enters a stable operating state when the pressure reaches the predetermined value. After a 5-second delay, the ultrasonic generator 300 is activated. The ultrasonic cavitation effect removes dirt from the heat exchanger plates, and the circulating pump transports the detached impurities to the filtration mechanism 600. After the set time is reached, the system first stops the ultrasonic generator, and then stops the circulating pump after a 30-second delay to prevent residual impurities from accumulating.

[0058] In the above structure, by setting the control system 800 to control the opening and closing adjustment of the ultrasonic generating mechanism 300 and the circulating pressurization module 240, automated and precise control can be achieved, improving the cleaning effect. It can automatically match the best cleaning parameters for different types of dirt (such as scale and grease), improve the automation effect, and reduce manual intervention.

[0059] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plate heat exchanger that requires no disassembly for cleaning, comprising a heat exchanger body (100), characterized in that, It also includes a cleaning fluid tank (200) and an ultrasonic generator (300). The heat exchanger body (100) includes a hot-side port (110) and a cold-side port (120). The cleaning fluid tank (200) includes a storage chamber (210) for containing cleaning fluid, an outlet (220) and an inlet (230) connected to the storage chamber (210), and a circulation pressurization module (240). The circulation pressurization module (240) is at least used to pressurize the cleaning fluid in the storage chamber (210) and then discharge it from the outlet (220) (220) (230). 0) Output, the liquid outlet (220) is connected to the hot side port (110) or the cold side port (120) through the first pipeline (400), the liquid inlet (230) is connected to the cold side port (120) or the hot side port (110) through the second pipeline (500), the second pipeline (500) is connected to a filter mechanism (600), the filter mechanism (600) is used to filter impurities in the cleaning liquid, and the ultrasonic generating mechanism (300) is connected to the outer wall of the heat exchanger body (100).

2. The plate heat exchanger that does not require disassembly for cleaning according to claim 1, characterized in that, The filtration mechanism (600) includes a filtration chamber (610) and a first inlet (620) and a first outlet (630) connected to the filtration chamber (610). The filtration chamber (610) is provided with a filter element (640). The first inlet (620) is connected to one end of the second pipeline (500), and the first outlet (630) is connected to the liquid inlet (230).

3. The plate heat exchanger that does not require disassembly for cleaning according to claim 2, characterized in that, The filter element (640) includes a support plate (641) and a filter medium (642) stacked together. The support plate (641) is provided with a plurality of liquid inlets (6411). The liquid inlets (6411) are connected to the first outlet (630). The filter medium (642) is disposed facing the first inlet (620). And / or, the filter medium (642) includes one or both of filter cotton and filter cloth.

4. The plate heat exchanger that does not require disassembly for cleaning according to claim 2, characterized in that, The inlet (230) is provided with a first connecting flange (231), the filter mechanism (600) is connected to the first connecting flange (231), one end of the second pipeline (500) is connected to the first connecting flange (231) and communicates with the first inlet (620).

5. The plate heat exchanger that does not require disassembly for cleaning according to claim 1, characterized in that, The circulating pressurization module (240) includes a pressurization pump body (241), a second inlet (242), and a second outlet (243). The storage cavity (210) is provided with a mounting bracket (211). The pressurization pump body (241) is fixedly connected to the mounting bracket (211), and there is an anti-clogging gap between the mounting bracket (211) and the bottom wall of the storage cavity (210). The second inlet (242) is connected to the storage cavity (210), and the second outlet (243) is connected to the liquid outlet (220).

6. The plate heat exchanger that does not require disassembly for cleaning according to claim 5, characterized in that, The distance between the second inlet (242) and the bottom wall of the storage cavity (210) is 5-10 cm; And / or, a filter (2421) is connected to the port of the second inlet (242).

7. The plate heat exchanger that does not require disassembly for cleaning according to claim 1, characterized in that, The heat exchanger body (100) further includes a three-way connecting pipe one (710) and a three-way connecting pipe two (720). The first port of the three-way connecting pipe one (710) is connected to the hot side port (110), the second port is at least used for material passage, and the third port is connected to one end of the first pipeline (400) or the second pipeline (500). The first port of the three-way connecting pipe two (720) is connected to the cold side port (120), the second port is at least used for material passage, and the third port is connected to one end of the second pipeline (500) or the first pipeline (400).

8. The plate heat exchanger that does not require disassembly for cleaning according to claim 7, characterized in that, Ball valves (730) are connected to the three ports of the first three-way connecting pipe (710) and the second three-way connecting pipe (720). One end of the first pipe (400) or the second pipe (500) is connected to the ball valve (730).

9. A plate heat exchanger that does not require disassembly for cleaning according to claim 7, characterized in that, The heat exchanger body (100) also includes a material pipe body (740), and a second connecting flange (750) is provided at both the first tee connecting pipe (710) and the second tee connecting pipe port. One end of the material pipe body (740) is connected to the second connecting flange (750).

10. A plate heat exchanger that does not require disassembly for cleaning according to claim 1, characterized in that, The heat exchanger body (100) also includes a control system (800), the ultrasonic generating mechanism (300) and the circulating pressurization module (240) are both connected to the control system (800), and the control system (800) is used to control the opening and closing adjustment of the ultrasonic generating mechanism (300) and the opening and closing adjustment of the circulating pressurization module (240).

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