Heat exchanger structure with built-in dirt self-cleaning device

Abstract

According to the heat exchanger structure with the built-in dirt self-cleaning device, a plurality of high-pressure outlet flow channels are transversely arranged on the top face in a main cavity in parallel, the high-pressure outlet flow channels are arranged in the main cavity in an embedded mode, and a cleaning connector is connected with a four-way electromagnetic valve through a cleaning pipeline; the four-way electromagnetic valve is arranged in the middle of the cold liquid inlet pipe and communicated with the cold liquid inlet pipe, the four-way electromagnetic valve is in linkage control connection with the temperature sensor through a cable, and the temperature sensor is arranged in the middle of the cold liquid outlet pipe. The cleaning structure is further communicated with a cold liquid inlet pipe through a pipeline and an electromagnetic valve, so that water of the cold liquid inlet pipe is directly led out, the inner diameter of the cleaning structure is reduced, the high-pressure cleaning effect is achieved, the electromagnetic valve is further connected with a temperature sensor arranged at the position of a cold liquid outlet pipe, and when the outlet pipe is stably lowered to the limit, the electromagnetic valve is started for cleaning; therefore, the self-cleaning effect of the whole heat exchanger is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchanger structures, and specifically relates to a heat exchanger structure with a built-in dirt self-cleaning device. Background Art

[0002] The plate heat exchanger is a new type of high-efficiency heat exchanger composed of a series of metal sheets with a certain corrugated shape. It has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small footprint, wide application and long service life.

[0003] At present, the plate heat exchanger is a new type of heat exchanger made of a series of metal sheets with a certain corrugated shape. Thin rectangular channels are formed between various plates, and heat exchange is carried out through the plates. The plate heat exchanger is a heat exchanger made of thin metal plates pressed into heat exchange plates with a certain corrugated shape, which are then stacked and fastened with clamps and bolts. The working fluid flows through the narrow and tortuous channel formed between the two plates. The cold and hot fluids pass through the flow channel in turn. There is an interlayer plate in the middle to separate the fluids and exchange heat through this plate.

[0004] However, in the long-term practical process, condensation and other dirt will adhere to the surface of the plate heat exchanger, affecting the working efficiency of the plate heat exchanger. In recent years, relevant technologies have also emerged for the cleaning methods of plate heat exchangers. It is proposed to use fans for self-cleaning, but the disadvantage is that large particles cannot be completely cleaned and the cleaning efficiency is low; or use filters and spray pipes for self-cleaning, but the disadvantage is that filter cleaning is prone to blockage and the filter needs to be replaced from time to time; further actively use scrapers to clean the heat exchanger, but the disadvantage is that the scraper cleaning structure is complex and requires independent power drive. Summary of the invention

[0005] In order to solve the above problems, this paper proposes a heat exchanger structure with a built-in dirt self-cleaning device, a plurality of plates are arranged in parallel and equidistantly inside the main cavity of the heat exchanger, hot liquid conduits are arranged at both ends of the heat exchanger, and cold liquid inlet pipes and cold liquid outlet pipes are arranged on the upper and lower sides of the heat exchanger in a left-right axially symmetrical manner, a plurality of high-pressure outlet flow channels are arranged in parallel and transversely on the inner top surface of the main cavity, the high-pressure outlet flow channels are arranged in an embedded manner inside the main cavity, the upper ends of the high-pressure outlet flow channels are symmetrically connected to guide flow channels, the upper middle parts of the guide flow channels are connected to the outside in a conductive manner, the inner main pipes are arranged symmetrically inside the main cavity, and the inner main pipes are connected to the upper middle parts of the front and rear sides of the main cavity through cleaning interfaces. The cleaning interface is connected with the four-way solenoid valve through the cleaning pipeline, the four-way solenoid valve is arranged in the middle of the cold liquid inlet pipe and is connected, the four-way solenoid valve is connected with the temperature sensor through a cable and linkage control, the temperature sensor is arranged in the middle of the cold liquid outlet pipe, and a cleaning structure is embedded in the upper part of the original heat exchanger structure, and the cleaning structure is not only aligned with the surface of the plate, but also interconnected with the cold liquid inlet pipe through the pipeline and the solenoid valve, so as to realize the use of the water of the cold liquid inlet pipe to directly lead out the inner diameter of the cleaning structure to reduce the effect of high-pressure cleaning, and the solenoid valve is also connected to the temperature sensor arranged at the cold liquid outlet pipe, when the outlet pipe is stably reduced to the limit, the solenoid valve is started for cleaning, so as to achieve the self-cleaning effect of the overall heat exchanger.

[0006] The main cavity is in the shape of a transverse rectangular integrated cavity, a heat exchange cavity is arranged inside the main cavity, a plurality of plates are arranged in parallel transversely inside the heat exchange cavity, a cold liquid inlet pipe and a cold liquid outlet pipe are arranged on the upper and lower sides of the heat exchange cavity, the plates are all inner cavity plates, both ends of the plates are connected to the internal flow channels at the left and right ends of the main cavity, the plates are connected to the hot liquid conduits through the internal flow channels, and various flow channels are arranged inside the inner wall of the main cavity, not only the hot liquid diversion inside the plate can be realized, but also the effect of the internal cleaning mechanism can be realized, thereby achieving the integrity of the overall heat exchanger.

[0007] The four-way solenoid valve is an electrically controlled solenoid valve, with large-diameter interfaces at the upper and lower ends and small-diameter interfaces at the left and right ends. The large-diameter interface is connected to the cold liquid inlet, and the small-diameter interface is connected to the cleaning pipeline. The four-way solenoid valve can not only directly perform heat exchange operations of the heat exchanger through the large-diameter interface under normal operation, but also convert the valve core when cleaning is required. Such conversion can not only discharge the cold liquid inside the heat exchange chamber in advance, but also provide water supply for the cleaning mechanism.

[0008] The shape of the inner main pipe is a circular pipe, which is a single-pass countersunk circular pipe. The outer end of the inner main pipe is connected to the cleaning interface. The bottom side of the inner end of the inner main pipe is laterally conductively provided with a drainage guide groove. The shape of the drainage guide groove is a flat rectangular guide groove. The upper side of the drainage guide groove is connected to the inner main pipe, and the lower side of the drainage guide groove is connected to the high-pressure outlet flow channel. The cold water introduced into the cleaning interface is poured into the drainage guide groove in a diverted manner through the inner pipe, and the cold water is pressurized at the first level through the flat drainage guide groove, which is convenient for the subsequent spraying effect.

[0009] The cross-sectional shape of the high-pressure outlet flow channel is a tapered flow channel that is wide at the top and narrow at the bottom. The high-pressure outlet flow channel is arranged in a horizontally parallel manner in the middle between the two plates. The upper end of the high-pressure outlet flow channel is connected to the drainage guide groove, and the lower end of the high-pressure outlet flow channel is connected to the interior of the main cavity. The lowermost end of the high-pressure outlet flow channel is outwardly expanded and provided with an outward-expanding nozzle. Cold water is sprayed onto the outer surface of the plate through the high-pressure outlet flow channel, thereby cleaning the plate. Moreover, the tapered narrow-mouthed flow channel and the outward-expanding nozzle can allow the cold water to be pressurized and sprayed, thereby ensuring that the water has sufficient water pressure to rinse the plate and ensure the cleanliness of the plate.

[0010] Beneficial effects:

[0011] By setting an embedded cleaning structure above the original internal structure of the heat exchanger, and the cleaning structure is not only aligned with the surface of the plate, but also interconnected with the cold liquid inlet pipe through the pipeline and the solenoid valve, the water from the cold liquid inlet pipe can be directly discharged to reduce the inner diameter of the cleaning structure to achieve the effect of high-pressure cleaning, and the solenoid valve is also connected to the temperature sensor set at the cold liquid outlet pipe. When the outlet pipe is steadily reduced to the limit, the solenoid valve is started for cleaning, thereby achieving the self-cleaning effect of the entire heat exchanger.

[0012] By arranging various flow channels inside the inner wall of the main cavity, not only the hot liquid diversion inside the plate can be achieved, but also the effect of the internal cleaning mechanism can be achieved, thereby achieving the integrity of the overall heat exchanger.

[0013] The four-way solenoid valve can not only directly perform heat exchange operations of the heat exchanger under normal operation through the large-diameter interface, but also switch the valve core when cleaning is required. Such a conversion can not only discharge the cold liquid inside the heat exchange chamber in advance, but also provide water supply for the cleaning mechanism.

[0014] The cold water introduced into the cleaning interface is poured into the drainage groove in a diverted manner through the internal pipe, and the cold water is pressurized at the first level through the flat drainage groove to facilitate the subsequent spraying effect.

[0015] The cold water is sprayed onto the outer surface of the plate through the high-pressure outlet flow channel, so that the plate can be cleaned. The conical narrow flow channel and the outward-expanding nozzle can spray the cold water under pressure, thereby ensuring that the water has enough water pressure to flush the plate and keep the plate clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a heat exchanger with a built-in dirt self-cleaning device;

[0017] Figure 2 It is a cross-sectional schematic diagram of a heat exchanger structure with a built-in dirt self-cleaning device;

[0018] Figure 3 It is a partial enlarged cross-sectional view of a heat exchanger structure with a built-in dirt self-cleaning device;

[0019] In the figure; 1. main cavity, 2. plate, 3. hot liquid conduit, 4. cold liquid inlet pipe, 5. cold liquid outlet pipe, 6. four-way solenoid valve, 7. temperature sensor, 8. cleaning pipeline, 9. cleaning interface, 10. internal main pipe, 11. guide flow channel, 12. high-pressure outlet flow channel, 13. outward expansion nozzle. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0021] Main cavity 1, plate 2, hot liquid conduit 3, cold liquid inlet pipe 4, cold liquid outlet pipe 5, four-way solenoid valve 6, temperature sensor 7, cleaning pipeline 8, cleaning interface 9, internal main pipe 10, guide flow channel 11, high-pressure outlet flow channel 12, and external expansion nozzle 13.

[0022] like Figure 1 , 2 , as shown in 3;

[0023] A heat exchanger structure with a built-in dirt self-cleaning device, wherein a plurality of plates 2 are arranged in parallel and equidistantly in the main cavity 1 of the heat exchanger, hot liquid conduits 3 are arranged at both left and right ends of the heat exchanger, and cold liquid inlet pipes 4 and cold liquid outlet pipes 5 are arranged in a left-right axially symmetrical manner on the upper and lower sides of the heat exchanger, a plurality of high-pressure outlet flow channels 12 are arranged in parallel in the inner top surface of the main cavity 1, the high-pressure outlet flow channels 12 are arranged in an embedded manner in the main cavity 1, and guide flow channels 11 are arranged in a left-right symmetrical and conductive manner at the upper ends of the high-pressure outlet flow channels 12, and an inner main pipe 10 is arranged in a conductive manner to the outside in the middle and upper parts of the guide flow channels 11, The inner main pipe 10 is symmetrically arranged inside the main cavity 1, and the inner main pipe 10 is connected to the middle upper part of the front and rear sides of the main cavity 1 through a cleaning interface 9. The cleaning interface 9 is connected to the four-way solenoid valve 6 through a cleaning pipeline 8. The four-way solenoid valve 6 is arranged in the middle of the cold liquid inlet pipe 4 and is connected. The four-way solenoid valve 6 is connected to the temperature sensor 7 through a cable. The temperature sensor 7 is arranged in the middle of the cold liquid outlet pipe 5. The shape of the main cavity 1 is a horizontal rectangular integrated cavity. A heat exchange cavity is arranged inside the main cavity 1. A plurality of plates 2 are arranged in parallel inside the heat exchange cavity. A cold liquid inlet pipe 4 and a cold liquid outlet pipe 5 are provided on both the upper and lower sides. The plates 2 are all inner cavity plates 2. Both ends of the plates 2 are conductively connected to the internal flow channels on the left and right ends of the main cavity 1. The plates 2 are mutually conductive with the hot liquid conduit 3 through the internal flow channels. The four-way solenoid valve 6 is an electrically controlled solenoid valve. Large-caliber interfaces are provided on the upper and lower ends of the four-way solenoid valve 6. Small-caliber interfaces are provided on the left and right ends of the four-way solenoid valve 6. The large-caliber interface is connected to the cold liquid inlet, and the small-caliber interface is connected to the cleaning pipeline 8. The shape of the internal main pipe 10 is a circular pipe. The internal main pipe 10 is a single-pass countersunk round pipe. The internal main pipe 1 The outer end of 0 is communicated with the cleaning interface 9, and the inner end bottom side of the inner main pipe 10 is laterally conductively provided with a drainage guide groove, the shape of the drainage guide groove is a flat rectangular guide groove, the upper side of the drainage guide groove is communicated with the inner main pipe 10, and the lower side of the drainage guide groove is communicated with the high-pressure outlet flow channel 12. The cross-sectional shape of the high-pressure outlet flow channel 12 is a conical flow channel that is wide at the top and narrow at the bottom. The high-pressure outlet flow channel 12 is laterally parallel and arranged in the middle between the two plates 2. The upper end of the high-pressure outlet flow channel 12 is communicated with the drainage guide groove, and the lower end of the high-pressure outlet flow channel 12 is communicated with the interior of the main cavity 1. The lower end of the high-pressure outlet flow channel 12 is outwardly expanded and provided with an outward expansion nozzle 13.

[0024] Implementation examples;

[0025] During normal use, hot liquid is poured into one end of the main cavity 1 through the hot liquid conduit 3 and flows out from the other end through the inside of the plate 2, so that the inside of the heat exchange cavity can exchange heat normally. The cold liquid inlet pipe 4 introduces cold liquid into the inside of the heat exchange cavity through the four-way solenoid valve 6 to perform heat exchange operation, and then flows out from the cold liquid outlet pipe 5.

[0026] When the temperature sensor 7 of the cold liquid outlet pipe 5 senses that the water temperature of the outlet pipe slowly and gradually decreases to the threshold value over a long period of time, the four-way solenoid valve 6 is started, and the liquid originally to be used for heat exchange flows into the cleaning interface 9, the internal main pipe 10, the guide channel 11 and the high-pressure outlet channel 12 through the cleaning pipeline 8 in sequence for step-by-step physical pressurization, and finally the surface of the plate 2 is sprayed and cleaned with high pressure through the external expansion nozzle 13. When the temperature received by the temperature sensor 7 rises to the set cleaning threshold, the four-way solenoid valve 6 is restored, thereby completing the automated internal cleaning operation of the heat exchanger and continuing the heat exchange.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat exchanger structure with a built-in dirt self-cleaning device, wherein a plurality of plates are arranged in parallel and equidistantly in the main cavity of the heat exchanger, hot liquid conduits are arranged at both ends of the heat exchanger, and cold liquid inlet pipes and cold liquid outlet pipes are arranged at both upper and lower sides of the heat exchanger in a symmetrical manner in the left and right axes, characterized in that: A plurality of high-pressure outlet flow channels are arranged in parallel and transversely on the inner top surface of the main cavity. The high-pressure outlet flow channels are arranged in an embedded manner inside the main cavity. The upper ends of the high-pressure outlet flow channels are symmetrically connected to guide flow channels on the left and right sides. An inner main pipe is arranged on the upper middle part of the guide flow channels to be connected to the outside. The inner main pipe is symmetrically arranged inside the main cavity. The inner main pipe is connected to the upper middle part of the front and rear sides of the main cavity through a cleaning interface. The cleaning interface is connected to a four-way solenoid valve through a cleaning pipeline. The four-way solenoid valve is arranged in the middle of the cold liquid inlet pipe and is connected thereto. The four-way solenoid valve is connected to a temperature sensor through a cable for linkage control. The temperature sensor is arranged in the middle of the cold liquid outlet pipe.

2. A heat exchanger structure with a built-in dirt self-cleaning device according to claim 1, characterized in that: The main cavity is in the shape of a transverse rectangular integrated cavity, a heat exchange cavity is arranged inside the main cavity, a plurality of plates are arranged in parallel transversely inside the heat exchange cavity, a cold liquid inlet pipe and a cold liquid outlet pipe are arranged on the upper and lower sides of the heat exchange cavity, the plates are all inner cavity plates, both ends of the plates are connected to the internal flow channels at the left and right ends of the main cavity, and the plates are connected to the hot liquid conduit through the internal flow channels.

3. The heat exchanger structure with a built-in dirt self-cleaning device according to claim 1, characterized in that: The four-way solenoid valve is an electrically controlled solenoid valve, with large-diameter interfaces at the upper and lower ends and small-diameter interfaces at the left and right ends. The large-diameter interface is connected to the cold liquid inlet, and the small-diameter interface is connected to the cleaning pipeline.

4. The heat exchanger structure with a built-in dirt self-cleaning device according to claim 1, characterized in that: The inner main pipe is in the shape of a circular pipe, which is a single-pass countersunk circular pipe. The outer end of the inner main pipe is connected to the cleaning interface, and a drainage guide groove is provided on the bottom side of the inner end of the inner main pipe in a transverse conductive manner. The drainage guide groove is in the shape of a flat rectangular guide groove. The upper side of the drainage guide groove is connected to the inner main pipe, and the lower side of the drainage guide groove is connected to the high-pressure outlet flow channel.

5. The heat exchanger structure with a built-in dirt self-cleaning device according to claim 1, characterized in that: The cross-sectional shape of the high-pressure outlet flow channel is a tapered flow channel that is wide at the top and narrow at the bottom. The high-pressure outlet flow channel is arranged in a horizontally parallel manner in the middle between the two plates. The upper end of the high-pressure outlet flow channel is connected to the diversion guide groove, and the lower end of the high-pressure outlet flow channel is connected to the interior of the main cavity. The lowermost end of the high-pressure outlet flow channel is outwardly expanded and provided with an outward-expanding nozzle.

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