An efficient plate heat exchanger for preventing frosting

Abstract

The present invention relates to the field of plate heat exchangers, and discloses an efficient plate heat exchanger for preventing frosting. By means of a humidity detector and a first temperature sensor, it is judged whether to start the defrosting mode for defrosting, so as to avoid frosting on the surface of the heat exchanger due to being exposed and out of use for a long time, which affects the normal use of the heat exchanger during cold start. The high-temperature water for defrosting flows along the inner walls on both sides of the fluid cavity and conducts heat to the surfaces of a plurality of heat exchange plates, and performs "surrounding type" rapid heating defrosting on the four sides of the plates. Through a second temperature sensor and a third temperature sensor, the heat exchange rate is obtained, and it is judged whether it is necessary to start the dirt removal mode to clean the internal water scale. The controller controls the first solenoid valve and the fifth solenoid valve, and the first solenoid valve and the third solenoid valve to open the channels in different time periods respectively, and closes the other remaining valves in both cases. The liquid pump is used to suck the cleaning liquid and inject it into the double channels respectively to remove the water scale and realize self-cleaning.

Description

Technical Field

[0001] The present invention relates to the field of plate heat exchangers, and particularly to an efficient plate heat exchanger for preventing frosting. Background Art

[0002] In the current situation of tight energy supply and continuously improving environmental protection requirements, people are constantly seeking heat exchange methods that are both energy-saving and environmentally friendly, and the heat pump system is one of them. Since the heat pump can realize the function of transporting low-temperature heat energy to high-temperature heat energy, it can make extensive use of the heat in natural resources and waste heat resources, effectively saving the primary energy required for civil and industrial use. The heat pump system often needs to use a plate heat exchanger to achieve heat exchange.

[0003] When the outside temperature is relatively low, if the air contains more moisture, the moisture in the air will frost on the surface of the outside plate heat exchanger. When the heat exchanger is needed, it is difficult for the frosted heat exchanger to achieve high-quality heat exchange in a short time, resulting in the heat pump air-conditioning system being unable to quickly provide the heat exchange function, thereby reducing the use effect of the heat exchanger. To solve this problem, the mechanical defrosting method is usually adopted. For example, the mechanical defrosting device mentioned in the patent document with the publication number CN106595150A. However, using the mechanical method is not only difficult to defrost comprehensively, but also may damage the heat exchange fins. In addition, after the plate heat exchanger uses water circulation to achieve heat exchange for a period of time, internal water scale will accumulate and needs to be cleaned in time to avoid affecting the heat exchange efficiency. Therefore, we disclose an efficient plate heat exchanger for preventing frosting to meet the heat exchange requirements. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides an efficient plate heat exchanger for preventing frosting, which has the advantages of rapid defrosting, etc., and solves a series of problems such as the difficulty of comprehensive defrosting by mechanical means.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: An efficient plate heat exchanger for preventing frosting, comprising a body assembly, a detection mechanism, a defrosting mechanism, a thermal efficiency mechanism, and a decontamination mechanism. The body assembly includes a fixed pressing plate, a movable pressing plate, a liquid pump, and a plurality of evenly installed plates. A controller is installed on the fixed pressing plate, and the controller is electrically connected to the detection mechanism, the thermal efficiency mechanism, and the liquid pump. The defrosting mechanism is used for defrosting the surface of the plate heat exchanger, and the decontamination mechanism is used for removing water scale inside the heat exchanger. The controller analyzes the results of the detection mechanism and the thermal efficiency mechanism to determine whether to trigger the defrosting mechanism or the decontamination mechanism.

[0008] Preferably, the detection mechanism includes a humidity detector and a first temperature sensor. The humidity and temperature of the external environment where multiple said plates are located are respectively detected by the humidity detector and the first temperature sensor and transmitted into the controller. The humidity detector and the first temperature sensor are both installed thereon.

[0009] Preferably, the defrosting mechanism includes a defrosting heat dissipation frame, a defrosting pipe and a circulation pipe. The defrosting heat dissipation frame is made of a heat-conductive material. Multiple said plates are all located inside the defrosting heat dissipation frame and are in contact with its inner wall. A rectangular frame is fixedly connected to the top of the heat dissipation frame. A perforation is provided on the rectangular frame. One end of the defrosting pipe penetrates through the perforation and extends into the rectangular frame. A fluid cavity is provided inside the defrosting heat dissipation frame. The two ends of the defrosting pipe are indirectly communicated with the fluid cavity and the output end of the liquid pump respectively. High-temperature liquid flows and dissipates heat in the fluid cavity. A plurality of uniformly distributed and position-corresponding shunt holes are provided on the bottom side of the rectangular frame and the top inner wall of the fluid cavity. A partition plate is fixedly connected to the inner walls on both sides of the fluid cavity. A plurality of said shunt holes are respectively located on both sides of the partition plate. The input end and the output end of the liquid pump are respectively connected with a water inlet pipe and a water outlet pipe. A second solenoid valve is provided on the water inlet pipe. The control valve of the second solenoid valve is located inside the water inlet pipe and is adapted thereto. The other end of the water outlet pipe is threadedly connected with a second connecting pipe. A first one-way valve is provided on the circulation pipe.

[0010] Preferably, a plurality of clamping studs distributed on both sides are provided between the fixed pressing plate and the movable pressing plate. A plurality of connecting blocks slidably sleeved on the clamping studs are installed on the defrosting heat dissipation frame for fixing and quickly disassembling and assembling the defrosting heat dissipation frame. The two ends of a plurality of said clamping studs respectively penetrate through and and respectively extend to the outside of one side of and. Clamping nuts are threadedly sleeved on the two ends of a plurality of said clamping studs.

[0011] Preferably, a high-temperature interface, a low-temperature interface, a low-temperature outlet and a high-temperature outlet are provided on the fixed pressing plate. A low-temperature liquid outlet pipe and a high-temperature liquid outlet pipe are respectively connected to the low-temperature outlet and the high-temperature outlet. The other ends of the high-temperature interface and the low-temperature interface are respectively connected with a hot water conduit and a cold water conduit. Cold and hot water injection and outflow are realized through the above-mentioned multiple interfaces and pipes. The other end of the hot water conduit is connected to the second connecting pipe. A defrosting branch pipe is connected to the hot water conduit. The other end of the defrosting branch pipe is communicated with the defrosting pipe. A second one-way valve is provided on the cold water conduit. A mounting plate is fixedly sleeved on the hot water conduit. A fourth solenoid valve is provided on the mounting plate. The control valve of the fourth solenoid valve is located inside the defrosting branch pipe and is adapted thereto.

[0012] Preferably, the thermal efficiency mechanism includes a second temperature sensor and a third temperature sensor, which are respectively located in the high-temperature liquid outlet pipe and the high-temperature interface, and transmit the liquid temperature therein to the controller respectively. By analyzing the data by the controller, the heat exchange rate is obtained. The high-temperature interface is used to connect the hot water input.

[0013] Preferably, a warning lamp electrically connected thereto is provided on the controller. If the real-time heat exchange rate of the heat exchanger is lower than the set value in the controller, the corresponding warning lamp lights up to play a warning role. At the same time, the liquid pump is turned on by the controller to remove scale, and the warning lamp has multiple display states.

[0014] Preferably, the dirt removal mechanism includes a descaling pipe and a descaling branch pipe. A descaling box communicated with the liquid pump through the descaling pipe is installed on the movable pressing plate. The descaling box stores the descaling solution required to clean the heat exchanger pipeline. The output end of the liquid pump is respectively communicated with the high-temperature interface and the low-temperature interface through a hot water conduit and a descaling branch pipe. A first solenoid valve is provided on the descaling pipe, and the control valve of the first solenoid valve is located in the descaling pipe and is adapted thereto. A third solenoid valve is provided on the descaling branch pipe, and the control valve of the third solenoid valve is located in the descaling branch pipe and is adapted thereto. A fixed block is fixedly connected to one side of each of them. The descaling pipe sequentially passes through the two fixed blocks and is sleeved in the two fixed blocks.

[0015] Preferably, a first connecting pipe is threadedly connected to one end of each of the low-temperature liquid outlet pipe and the high-temperature liquid outlet pipe. Filter plates for collecting scale are installed in the two first connecting pipes. Corresponding solenoid valves or check valves are provided on the above-mentioned multiple pipelines to realize the independent operation of multiple pipeline channels. A plurality of uniformly distributed filter holes are formed in the two filter plates for filtering scale residues.

[0016] Preferably, the liquid pump, in cooperation with the controller, and multiple solenoid valves and check valves, constitute multiple working modes, including a working mode, a defrosting mode, and a dirt removal mode, and different valve opening methods correspond to different modes.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides an efficient plate heat exchanger for preventing frosting, having the following beneficial effects:

[0019] 1. The high-efficiency plate heat exchanger with anti-frosting function digitizes the humidity and temperature data of the external environment where the heat exchanger is located through a humidity detector and a first temperature sensor, and transmits the data to the controller for analysis. If the highest humidity or the lowest temperature set in the controller is reached, the defrosting mode is activated to defrost, avoiding frosting on the surface of the heat exchanger due to long-term exposure and affecting the normal use during cold start of the heat exchanger.

[0020] 2. The high-efficiency plate heat exchanger with anti-frosting function controls the second solenoid valve, the fourth solenoid valve, the fifth solenoid valve and the first one-way valve to open the passage by the controller, and controls the first solenoid valve, the third solenoid valve and the second one-way valve to close the passage, so that the input end of the liquid pump sucks in high-temperature water and indirectly discharges a part of the high-temperature water into the rectangular frame from the output end. Through the action of a plurality of evenly distributed shunt holes, the high-temperature water for defrosting flows along the inner walls on both sides of the fluid cavity, and conducts heat to the surfaces of a plurality of heat exchange plates, performing "surrounding" rapid heating defrosting on the four sides of the plates, rather than using mechanical defrosting, which may result in poor effect and easy damage to the plates.

[0021] 3. The high-efficiency plate heat exchanger with anti-frosting function controls the second solenoid valve, the fifth solenoid valve and the second one-way valve to open the passage by the controller, controls the first one-way valve, the first solenoid valve, the third solenoid valve and the fourth solenoid valve to close. The high-temperature water enters from the high-temperature interface and flows out from the low-temperature liquid outlet pipe, and the low-temperature water enters the heat exchanger from the low-temperature interface and flows out from the high-temperature liquid outlet pipe, so as to realize heat exchange through a plurality of internal heat exchange plates.

[0022] 4. The high-efficiency plate heat exchanger with anti-frosting function transmits the liquid temperatures in the high-temperature liquid outlet pipe and the high-temperature interface to the controller respectively through the settings of the second temperature sensor and the third temperature sensor. By analyzing the data by the controller, the heat exchange rate is obtained. If the heat exchange rate is lower than the lower limit value set in the controller, it may be that there is thick scale inside the plate passage, resulting in reduced heat exchange efficiency. Then the decontamination mode is activated for dredging and cleaning to realize the self-cleaning function of the heat exchanger.

[0023] 5. The high-efficiency plate heat exchanger with anti-frosting function controls the first solenoid valve, the fifth solenoid valve and the first solenoid valve, the third solenoid valve to open the passage in different time periods respectively by the controller, and closes the other remaining valves in the two cases respectively. Thus, the cleaning liquid in the descaling tank is sucked by the liquid pump and injected into the double channels respectively for removing scale, so as to realize intelligent automatic scale removal and improve the practicability of the device. If the heat exchange rate is still low after cleaning, it may be that the heat exchange plates are misaligned and the plates are leaking. It is necessary to replace the plates in time for repair to realize the self-inspection function of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0025] Figure 2 Schematic diagram of the three-dimensional structure of another perspective of the present invention;

[0026] Figure 3 Schematic diagram of the three-dimensional structure of the heat exchanger body of the present invention;

[0027] Figure 4 Schematic diagram of the three-dimensional structure of another perspective of the heat exchanger body of the present invention;

[0028] Figure 5 Schematic diagram of the three-dimensional structure of the present invention excluding the defrosting mechanism;

[0029] Figure 6 Schematic diagram of the three-dimensional structure of the defrosting mechanism of the present invention;

[0030] Figure 7 Schematic diagram of the three-dimensional structure of the dirt removal mechanism of the present invention;

[0031] Figure 8 For the present invention Figure 6 Partial enlarged structure schematic diagram in;

[0032] Figure 9 Schematic diagram of the method for judging the defrosting mode and working mode of the present invention;

[0033] Figure 10 Schematic diagram of the method for judging the dirt removal mode and working mode of the present invention.

[0034] In the figure: 1, fixed pressing plate; 2, movable pressing plate; 3, controller; 4, humidity detector; 5, first temperature sensor; 6, defrosting heat dissipation frame; 7, connecting block; 8, clamping stud; 9, high-temperature interface; 10, low-temperature interface; 11, low-temperature liquid outlet pipe; 12, high-temperature liquid outlet pipe; 13, first connecting pipe; 14, liquid pump; 15, water inlet pipe; 16, second connecting pipe; 17, defrosting branch pipe; 18, rectangular frame; 19, fluid cavity; 20, partition plate; 21, diversion hole; 22, defrosting pipe; 23, circulation pipe; 24, first check valve; 25, second temperature sensor; 26, third temperature sensor; 27, cold water conduit; 28, hot water conduit; 29, descaling tank; 30, descaling pipe; 31, first solenoid valve; 32, second solenoid valve; 33, descaling branch pipe; 34, third solenoid valve; 35, second check valve; 36, fourth solenoid valve; 37, fixed block; 38, warning lamp; 39, filter plate; 40, fifth solenoid valve. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes an efficient plate heat exchanger with anti-frosting.

[0037] In a typical implementation manner of the present application, as Figures 1-10 shown, an efficient plate heat exchanger with anti-frosting includes a body assembly, a detection mechanism, a defrosting mechanism, a thermal efficiency mechanism, and a dirt removal mechanism. The body assembly includes a fixed pressing plate 1, a movable pressing plate 2, a liquid pump 14, and a plurality of evenly installed plates. A controller 3 is installed on the fixed pressing plate 1. The controller 3 is electrically connected to the detection mechanism, the thermal efficiency mechanism, and the liquid pump 14. By analyzing the results of the detection mechanism and the thermal efficiency mechanism through the controller 3, it is respectively determined whether to trigger the defrosting mechanism and the dirt removal mechanism, and the defrosting mechanism and the dirt removal mechanism are respectively used to defrost the surface of the plate heat exchanger and remove scale inside the heat exchanger.

[0038] Furthermore, in the above solution, the detection mechanism includes a humidity detector 4 and a first temperature sensor 5. The humidity and temperature of the external environment where the plurality of plates are located are respectively detected by the humidity detector 4 and the first temperature sensor 5 and transmitted into the controller 3. The humidity detector 4 and the first temperature sensor 5 are both installed on the fixed pressing plate 1. Through the settings of the humidity detector 4 and the first temperature sensor 5, the humidity and temperature data of the external environment where the heat exchanger is located are digitalized, which is convenient for the controller 3 to analyze.

[0039] Further, in the above solution, the defrosting mechanism includes a defrosting heat dissipation frame 6, a defrosting pipe 22, and a circulation pipe 23. The defrosting heat dissipation frame 6 is made of a heat-conductive material. A plurality of plates are all located within the defrosting heat dissipation frame 6 and are in contact with its inner wall. Through the setting of the defrosting heat dissipation frame 6, it is convenient to achieve "wrapped" rapid defrosting. A rectangular frame 18 is fixedly connected to the top of the defrosting heat dissipation frame 6. A perforation is provided on the rectangular frame 18. One end of the defrosting pipe 22 passes through the perforation and extends into the rectangular frame 18. A fluid cavity 19 is provided within the defrosting heat dissipation frame 6. The two ends of the defrosting pipe 22 are indirectly communicated with the fluid cavity 19 and the output end of the liquid pump 14 respectively. High-temperature liquid flows and dissipates heat within the fluid cavity 19. A plurality of uniformly distributed and position-corresponding diversion holes 21 are provided on the bottom side of the rectangular frame 18 and the top-side inner wall of the fluid cavity 19. A partition plate 20 is fixedly connected to the inner walls on both sides of the fluid cavity 19. A plurality of diversion holes 21 are respectively located on both sides of the partition plate 20. The input end and the output end of the liquid pump 14 are respectively connected with a water inlet pipe 15 and a water outlet pipe. A second solenoid valve 32 is provided on the water inlet pipe 15. The control valve of the second solenoid valve 32 is located within the water inlet pipe 15 and is adapted thereto. The other end of the water outlet pipe is threadedly connected with a second connecting pipe 16. A first one-way valve 24 is provided on the circulation pipe 23. Through the setting of the first one-way valve 24, in the normal working mode, the high-temperature liquid will not be injected back into the fluid cavity 19, avoiding the occurrence of backflow phenomenon.

[0040] Further, in the above solution, a plurality of clamping studs 8 distributed on both sides are provided between the fixed pressing plate 1 and the movable pressing plate 2. A plurality of connecting blocks 7 slidably sleeved on the clamping studs 8 are installed on the defrosting heat dissipation frame 6 for fixing and quickly disassembling and assembling the defrosting heat dissipation frame 6. The two ends of the plurality of clamping studs 8 respectively penetrate through the fixed pressing plate 1 and the movable pressing plate 2 and extend to the outside of one side of the fixed pressing plate 1 and the movable pressing plate 2 respectively. Clamping nuts are threadedly sleeved on the two ends of the plurality of clamping studs 8. Through the setting of the clamping studs 8 and the clamping nuts, it is convenient to disassemble and assemble a plurality of heat exchange plates.

[0041] Further, in the above solution, the fixed pressing plate 1 is provided with a high-temperature interface 9, a low-temperature interface 10, a low-temperature outlet and a high-temperature outlet. A low-temperature liquid outlet pipe 11 and a high-temperature liquid outlet pipe 12 are respectively connected to the low-temperature outlet and the high-temperature outlet. The other ends of the high-temperature interface 9 and the low-temperature interface 10 are respectively connected to a hot water conduit 28 and a cold water conduit 27. Through the above-mentioned multiple interfaces and pipes, the injection and outflow of cold and hot water are realized. The other end of the hot water conduit 28 is connected to the second connecting pipe 16. A defrosting branch pipe 17 is connected to the hot water conduit 28. The other end of the defrosting branch pipe 17 is communicated with the defrosting pipe 22. A second one-way valve 35 is provided on the cold water conduit 27. An installation plate is fixedly sleeved on the hot water conduit 28. A fourth solenoid valve 36 is provided on the installation plate. The control valve of the fourth solenoid valve 36 is located in the defrosting branch pipe 17 and is adapted to it. Through the setting of the second one-way valve 35, when the liquid pump 14 removes scale from the cold water conduit 27, the cleaning solution will not be directly discharged outward from the cold water conduit 27 without passing through the inside of the heat exchanger.

[0042] Further, in the above solution, the thermal efficiency mechanism includes a second temperature sensor 25 and a third temperature sensor 26. The second temperature sensor 25 and the third temperature sensor 26 are respectively located in the high-temperature liquid outlet pipe 12 and the high-temperature interface 9, and respectively transmit the liquid temperature therein to the controller 3. After analyzing the data by the controller 3, the heat exchange rate is obtained. The high-temperature interface 9 is used to connect the hot water input. After analyzing the heat exchange rate by the controller 3, it is decided whether it is necessary to remove scale from the inside of the heat exchanger.

[0043] Further, in the above solution, a warning lamp 38 electrically connected to the controller 3 is provided on the controller 3. If the real-time heat exchange rate of the heat exchanger is lower than the set value in the controller 3, the corresponding warning lamp 38 lights up to play a warning role. At the same time, the liquid pump 14 is turned on by the controller 3 to remove scale. The warning lamp 38 has multiple display states. If the heat exchange rate is still not high after removing scale from the inside of the heat exchanger, the warning lamp 38 emits corresponding information to indicate that there may be a situation of plate position deviation or plate leakage, and maintenance needs to be carried out in time.

[0044] Further, in the above solution, the decontamination mechanism includes a descaling pipe 30 and descaling branch pipes 33. A descaling tank 29 connected to a liquid pump 14 through the descaling pipe 30 is installed on the movable pressing plate 2. A descaling solution for cleaning the heat exchanger pipeline is stored in the descaling tank 29. The output end of the liquid pump 14 is respectively connected to a high-temperature interface 9 and a low-temperature interface 10 through a hot water conduit 28 and the descaling branch pipes 33. A first solenoid valve 31 is provided on the descaling pipe 30. The control valve of the first solenoid valve 31 is located inside the descaling pipe 30 and is adapted thereto. A third solenoid valve 34 is provided on the descaling branch pipe 33. The control valve of the third solenoid valve 34 is located inside the descaling branch pipe 33 and is adapted thereto. Fixed blocks 37 are fixedly connected to one side of the fixed pressing plate 1 and the movable pressing plate 2. The descaling pipe 30 sequentially passes through the two fixed blocks 37 and is sleeved inside the two fixed blocks 37. Through the arrangement of the fixed blocks 37, it is convenient to fix the relatively long descaling pipe 30, and it is convenient for the liquid pump 14 to suck the special cleaning liquid in the descaling tank 29 and discharge it into the heat exchanger for descaling.

[0045] Further, in the above solution, first connecting pipes 13 are threadedly connected to one ends of the low-temperature liquid outlet pipe 11 and the high-temperature liquid outlet pipe 12. Filter plates 39 for collecting water scale are installed inside the two first connecting pipes 13. Corresponding solenoid valves or check valves are provided on the above-mentioned multiple pipelines to realize the independent operation of multiple pipeline channels. A plurality of uniformly distributed filter holes are provided on each of the two filter plates 39 for filtering water scale residues. Through the threaded connection arrangement, it is convenient to remove the first connecting pipe 13 for cleaning and maintenance to avoid blockage inside the first connecting pipe 13 caused by long-term use.

[0046] Further, in the above solution, the liquid pump 14, the controller 3, and multiple solenoid valves and check valves cooperate with each other to form multiple working modes, namely the working mode, the defrosting mode, and the decontamination mode. Among them, different valve opening methods correspond to different modes. Through the mutual adjustment of multiple modes, the utilization rate of the liquid pump 14 is improved, and the service life of the heat exchanger is also improved.

[0047] Working principle: During use, through the humidity detector 4 and the first temperature sensor 5, the external environment humidity and temperature data of the heat exchanger are digitized and transmitted to the controller 3 for analysis. If the highest humidity or the lowest temperature set in the controller 3 is reached, the defrosting mode is started for defrosting to prevent the heat exchanger from frosting on the surface due to long-term exposure and inactivity, which affects the normal use of the heat exchanger.

[0048] After the defrosting mode is turned on, the controller 3 controls the second solenoid valve 32, the fourth solenoid valve 36, the fifth solenoid valve 40 and the first check valve 24 to open the channels, and controls the first solenoid valve 31, the third solenoid valve 34 and the second check valve 35 to close the channels, so that the input end of the liquid pump 14 sucks in high-temperature water and indirectly discharges a part of the high-temperature water into the rectangular frame 18 from the output end. Through the action of a plurality of evenly distributed shunt holes 21, the high-temperature water for defrosting flows along the inner walls on both sides of the fluid cavity 19, and conducts heat to the surfaces of a plurality of heat exchange plates, thereby performing "surrounding type" rapid heating defrosting on the four sides of the plates, avoiding the situation of poor mechanical defrosting effect and easy damage to the plates.

[0049] If defrosting is not required, the working mode is turned on. The controller 3 controls the second solenoid valve 32, the fifth solenoid valve 40 and the second check valve 35 to open the channels, and controls the first check valve 24, the first solenoid valve 31, the third solenoid valve 34 and the fourth solenoid valve 36 to close. The high-temperature water enters from the high-temperature interface 9 and flows out from the low-temperature liquid outlet pipe 11, and the low-temperature water enters the heat exchanger from the low-temperature interface 10 and flows out from the high-temperature liquid outlet pipe 12, thereby completing the heat exchange.

[0050] Through the settings of the second temperature sensor 25 and the third temperature sensor 26, the liquid temperatures in the high-temperature liquid outlet pipe 12 and the high-temperature interface 9 are respectively transmitted to the controller 3. By analyzing the data by the controller 3, the heat exchange rate is obtained. If the heat exchange rate is lower than the lower limit value set in the controller 3, it may be that there is relatively thick water scale inside the plate channels, resulting in a reduction in heat exchange efficiency. Then the decontamination mode is turned on for dredging and cleaning.

[0051] After the decontamination mode is turned on, the controller 3 controls the first solenoid valve 31, the fifth solenoid valve 40 and the first solenoid valve 31, the third solenoid valve 34 to open the channels in different time periods respectively, and closes the other remaining valves in both cases, so as to suck the cleaning liquid in the descaling tank 29 into the liquid pump 14 and inject it into the double channels respectively for removing water scale, thereby achieving the purpose of intelligent automatic cleaning, improving the practicability of the device. If the heat exchange rate is still low after cleaning, it may be that the heat exchange plates are misaligned and the plates are leaking. The warning light 38 emits corresponding information to prompt for maintenance.

[0052] By setting the filter plate 39, it is used for collecting water scale after the decontamination mode is turned on. Through the threaded connection method, it is convenient to remove the first connecting pipe 13 for cleaning and maintenance after using for a period of time, avoiding the blockage inside the first connecting pipe 13 caused by long-term use and affecting the normal use of the heat exchanger.

[0053] By setting the corresponding trigger mechanism, the above-mentioned multiple modes are converted with each other, which not only improves the utilization rate of the liquid pump 14, but also enables the traditional heat exchanger to have practical functions such as defrosting and descaling, and improves the service life of the heat exchanger.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient plate heat exchanger for preventing frosting, comprising a body assembly, a detection mechanism, a defrosting mechanism, a thermal efficiency mechanism and a decontamination mechanism, characterized in that: The body component includes a fixed pressing plate (1), a movable pressing plate (2), a liquid pump (14), and a plurality of evenly installed plates. A controller (3) is installed on the fixed pressing plate (1). The controller (3) is electrically connected to a detection mechanism, a thermal efficiency mechanism, and the liquid pump (14). The defrosting mechanism is used to defrost the surface of the plate heat exchanger, and the dirt removal mechanism is used to remove scale inside the heat exchanger. The controller (3) analyzes the results of the detection mechanism and the thermal efficiency mechanism to determine whether to trigger the defrosting mechanism or the dirt removal mechanism; The detection mechanism includes a humidity detector (4) and a first temperature sensor (5). The humidity and temperature of the external environment where the plurality of plates are located are respectively detected by the controller (3) and the humidity detector (4) and transmitted into the controller (3); The defrosting mechanism includes a defrosting heat dissipation frame (6), a defrosting pipe (22), and a circulation pipe (23). The defrosting heat dissipation frame (6) is made of a heat-conducting material. The plurality of plates are all located inside the defrosting heat dissipation frame (6) and are in contact with its inner wall. A fluid cavity (19) is opened inside the defrosting heat dissipation frame (6). The two ends of the defrosting pipe (22) are indirectly communicated with the fluid cavity (19) and the output end of the liquid pump (14) respectively. High-temperature liquid flows in the fluid cavity (19) and dissipates heat; A plurality of clamping studs (8) are distributed on both sides between the fixed pressing plate (1) and the movable pressing plate (2). A plurality of connecting blocks (7) sleeved on the clamping studs (8) are installed on the defrosting heat dissipation frame (6) to fix and quickly disassemble and assemble the defrosting heat dissipation frame (6); The fixed pressing plate (1) is provided with a high-temperature interface (9), a low-temperature interface (10), a low-temperature outlet, and a high-temperature outlet. A low-temperature liquid outlet pipe (11) and a high-temperature liquid outlet pipe (12) are respectively connected to the low-temperature outlet and the high-temperature outlet. The other ends of the high-temperature interface (9) and the low-temperature interface (10) are respectively connected to a hot water conduit (28) and a cold water conduit (27). The injection and outflow of cold and hot water are realized through the above-mentioned multiple interfaces and pipelines.

2. The high-efficiency plate heat exchanger for preventing frosting according to claim 1, wherein: The thermal efficiency mechanism includes a second temperature sensor (25) and a third temperature sensor (26). The second temperature sensor (25) and the third temperature sensor (26) are respectively located inside the high-temperature liquid outlet pipe (12) and the high-temperature interface (9), and respectively transmit the liquid temperature therein into the controller (3). The controller (3) analyzes the data to obtain the heat exchange rate.

3. The high-efficiency plate heat exchanger for preventing frosting according to claim 2, wherein: A warning lamp (38) electrically connected to the controller (3) is provided on the controller (3). If the real-time heat exchange rate of the heat exchanger is lower than the set value in the controller (3), the corresponding warning lamp (38) lights up to play a warning role. At the same time, the liquid pump (14) is started by the controller (3) to remove scale.

4. The high-efficiency plate heat exchanger for preventing frosting according to claim 3, characterized in that: The decontamination mechanism includes a descaling pipe (30) and a descaling branch pipe (33). A descaling tank (29) connected to a liquid pump (14) through the descaling pipe (30) is installed on the movable pressing plate (2). A descaling solution for cleaning the heat exchanger pipeline is stored in the descaling tank (29). The output end of the liquid pump (14) is respectively connected to a high-temperature interface (9) and a low-temperature interface (10) through a hot water conduit (28) and the descaling branch pipe (33).

5. The high-efficiency plate heat exchanger for preventing frosting according to claim 1, characterized in that: One end of each of the low-temperature liquid outlet pipe (11) and the high-temperature liquid outlet pipe (12) is threadedly connected with a first connecting pipe (13). Filter plates (39) for collecting water scale are installed in both of the two first connecting pipes (13). Corresponding solenoid valves or check valves are provided on the above-mentioned multiple pipelines to realize the independent operation of multiple pipeline channels.

6. The high-efficiency plate heat exchanger for preventing frosting according to claim 1, wherein: The liquid pump (14) cooperates with the controller (3), as well as multiple solenoid valves and check valves to form multiple working modes, including a working mode, a defrosting mode, and a decontamination mode.

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