Energy-saving tower heat exchanger and control method thereof

Abstract

The application discloses an energy-saving tower type heat exchange device and a control method thereof, wherein the energy-saving tower type heat exchange device comprises a heat exchange component, a refrigerant supply component and a controller; the heat exchange component comprises a first heat exchanger and a second heat exchanger; the refrigerant supply component is selectively connected with the first heat exchanger and the second heat exchanger through a fluid pipeline; the controller comprises a first temperature sensor, a second temperature sensor and a wind speed sensor; the first temperature sensor is arranged on an outer side wall of the first heat exchanger, and the second temperature sensor is arranged on an outer side wall of the second heat exchanger; when the temperature value of the corresponding area of any heat exchanger is lower than a preset first temperature threshold value, the controller controls the refrigerant supply component to cut off the refrigerant supply to the heat exchanger; when the temperature of the corresponding area of any heat exchanger is higher than a preset second temperature threshold value, the controller controls the refrigerant supply component to restore the refrigerant supply to the heat exchanger. The heat exchange efficiency can be improved, and the energy consumption can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange equipment, in particular to an energy-saving tower type heat exchange device and a control method thereof. BACKGROUND

[0002] The existing heat exchange devices generally have the problems of low heat exchange efficiency and high energy consumption. The conventional heat exchange equipment usually adopts a fixed heat exchange structure, which cannot dynamically adjust the heat exchange intensity according to the actual working condition, resulting in serious energy waste. In particular, in the tower type heat exchange device, due to uneven distribution of environmental temperature, the fixed flow of refrigerant supply mode will cause the situation of overcooling in some areas and insufficient heat exchange in some areas. In addition, the existing device lacks an intelligent temperature monitoring and refrigerant supply control system, and it is difficult to realize precise energy-saving operation. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an energy-saving tower type heat exchange device, which can improve the heat exchange efficiency and reduce the energy consumption.

[0004] The present application also provides a control method for the energy-saving tower type heat exchange device.

[0005] According to the first aspect of the present application, an energy-saving tower type heat exchange device comprises:

[0006] A heat exchange component comprising a first heat exchanger and a second heat exchanger;

[0007] A refrigerant supply component selectively connected to the first heat exchanger and the second heat exchanger through a fluid pipeline;

[0008] A controller comprising a first temperature sensor, a second temperature sensor and a wind speed sensor, the first temperature sensor is arranged on the outer side wall of the first heat exchanger, and the second temperature sensor is arranged on the outer side wall of the second heat exchanger;

[0009] The controller obtains the detection temperature of the first temperature sensor and the second temperature sensor in real time, when the temperature value of the region corresponding to any heat exchanger is lower than the preset first temperature threshold, the controller controls the refrigerant supply component to cut off the refrigerant supply to the heat exchanger, and when the temperature of the region corresponding to any heat exchanger is higher than the preset second temperature threshold, the controller controls the refrigerant supply component to restore the refrigerant supply to the heat exchanger.

[0010] According to the energy-saving tower heat exchange device provided by the embodiment of the present application, the following beneficial effects are achieved: the first heat exchanger and the second heat exchanger are arranged, and the intelligent control mechanism of the refrigerant supply component and the controller is combined, so that efficient energy-saving control of the heat exchange process is achieved. Specifically, the controller monitors the temperature changes of the outer walls of the two heat exchangers in real time through the first temperature sensor and the second temperature sensor, and automatically controls the start and stop of the refrigerant supply component according to the set first temperature threshold and the second temperature threshold, thereby avoiding continuous cooling in unnecessary cases and effectively reducing energy consumption; when the temperature of a heat exchange area is lower than the set low temperature threshold, the system automatically cuts off the refrigerant supply of the area to prevent energy waste caused by excessive cooling; when the temperature rises above the high temperature threshold, the system resumes the cooling to ensure the heat exchange efficiency and realize on-demand energy supply, thereby improving the operation efficiency of the whole system; the refrigerant supply component only operates under necessary conditions, thereby reducing the unnecessary start-up times and operation time, reducing equipment wear and tear, helping to prolong the service life of the heat exchange device and related components, and reducing the maintenance frequency and cost; the wind speed sensor can further optimize the influence of environmental factors on the heat exchange efficiency, improve the adaptability of the control system to changes in external conditions, and make the whole heat exchange device have higher intelligent level and automation degree; the compact tower structure design has high space utilization rate, is suitable for various industrial cooling scenes, is especially suitable for application occasions that require partition temperature control and energy saving, and has good popularization value and application prospect.

[0011] According to some embodiments of the present application, when applied to a cold storage, the first heat exchanger is arranged in the area above the cold storage door body, the second heat exchanger is arranged in the central area of the top of the cold storage, the first temperature sensor is used to detect the temperature of the cold storage door body position, the second temperature sensor is used to detect the temperature of the central area inside the cold storage, and the wind speed sensor is arranged in the air flow channel between the central area of the cold storage and the door body.

[0012] (1) When the first temperature sensor detects that the temperature of the area above the cold storage door body is higher than the second temperature threshold, the refrigerant supply of the first heat exchanger is started;

[0013] (2) If the second temperature sensor detects that the temperature of the central area of the top of the cold storage is lower than the first temperature threshold at this time, but the wind speed sensor detects that the current wind direction is from the second heat exchanger to the first heat exchanger, and the wind speed value exceeds 3 m / s, the refrigerant supply of the second heat exchanger is forced to be maintained;

[0014] (3) When any of the following conditions is met, the refrigerant supply of the second heat exchanger is turned off:

[0015] The wind speed value falls below 2 m / s;

[0016] The temperature of the area corresponding to the first heat exchanger falls below the first temperature threshold;

[0017] The cold storage door body closing state lasts more than 30 seconds. By introducing a wind speed sensor and comprehensively considering the airflow direction and speed, the system can more accurately predict the cold distribution trend. Compared with the traditional control system which only relies on single temperature feedback, the device significantly improves the adaptability to frequent door opening, goods in and out and other disturbance factors, and enhances the stability and intelligent level of the system.

[0018] According to some embodiments of the application, when applied to outdoor power facilities, the first heat exchanger is arranged on the side of the power equipment directly exposed to the sun, the second heat exchanger is arranged on the side of the power equipment away from the sun, and the wind speed sensor is arranged on the top of the power equipment for detecting the real-time wind speed.

[0019] (1) When the first temperature sensor detects that the temperature on the side directly exposed to the sun is higher than the second temperature threshold, the refrigerant supply of the first heat exchanger is started;

[0020] (2) If the wind speed sensor detects that the real-time wind speed exceeds 4 m / s, and the second temperature sensor detects that the temperature of the area corresponding to the second heat exchanger rises by more than 5℃ within 10 minutes, the refrigerant supply of the second heat exchanger is forcibly started;

[0021] (3) When the real-time wind speed falls below 2 m / s and the temperature of the area corresponding to the second heat exchanger is lower than the first temperature threshold, the refrigerant supply of the second heat exchanger is turned off. If the wind speed sensor detects that the current wind speed exceeds 4 m / s, and the second temperature sensor detects that the temperature on the side away from the sun rises by more than 5℃ in a short time, it indicates that the external airflow may carry heat from the directly exposed side to the side away from the sun. The system forcibly starts the refrigerant supply of the second heat exchanger to effectively deal with the heat diffusion problem caused by wind force and ensure the balance and stability of the overall temperature field of the equipment.

[0022] According to some embodiments of the application, the controller further comprises a pressure sensor arranged in the liquid outlet pipeline of the refrigerant supply component and electrically connected with the controller.

[0023] When the second heat exchanger is forcibly cooled due to wind speed, if the refrigerant supply pressure of the first heat exchanger is insufficient, the refrigerant supply component preferentially supplies the first heat exchanger. Dynamically adjusting the distribution priority of refrigerant can avoid wasting refrigerant resources in non-critical areas, so as to realize more scientific and reasonable energy utilization and improve the operation efficiency of the overall system.

[0024] According to some embodiments of the present application, the refrigerant supply component further comprises a filter cartridge, the filter cartridge is arranged in the liquid outlet pipeline of the refrigerant supply component, two ends of the filter cartridge are connected with the liquid outlet pipeline through flanges respectively, and a V-shaped filter screen is arranged in the filter cartridge. The V-shaped filter screen can more effectively collect and fix impurities, reduce the risk of the impurities entering the heat exchanger or other key components, the flange connection can easily complete the disassembly and assembly of the filter cartridge without using special tools or performing complex operations, and the V-shaped filter screen can be conveniently checked and cleaned regularly to ensure its continuous and efficient filtering performance.

[0025] According to some embodiments of the present application, the heat exchange device comprises a first heat exchange sheet and a second heat exchange sheet arranged in a stack, the first heat exchange sheet is provided with a first slot, the second heat exchange sheet is provided with a second slot, and the projection of the first slot and the second slot along the depth direction is partially overlapped or completely staggered. The whole heat dissipation area of the two heat exchange sheets can participate in the evaporation heat transfer process, and the heat exchange efficiency is improved.

[0026] According to some embodiments of the present application, the first heat exchange sheet is provided with a first heat exchange fin arranged on one side of the length direction of the first slot, the second heat exchange sheet is provided with a second heat exchange fin arranged on one side of the length direction of the second slot, the first heat exchange fin is arranged in a direction away from the first heat exchange sheet, and the second heat exchange fin is arranged in a direction away from the second heat exchange sheet. In the limited space, the heat exchange area density is improved by the inclined arrangement of the fins, the heat exchanger structure is more compact, the whole machine volume is reduced, and the application scenario with limited space is suitable.

[0027] According to some embodiments of the present application, the heat exchange component further comprises a water distribution pipe row, the water distribution pipe row is clamped above the first heat exchange sheet and the second heat exchange sheet, the water distribution pipe row comprises a first containing cavity and a second containing cavity, the first containing cavity and the second containing cavity are arranged in the length direction of the water distribution pipe row, one end of the water distribution pipe row is connected with a water supply pipe, a water guide hole is arranged between the first containing cavity and the second containing cavity, the water guide hole is arranged at the bottom of the first containing cavity, and the inner side wall of the second containing cavity abuts against the first heat exchange sheet and the second heat exchange sheet respectively. This design helps to ensure that the cooling water can be quickly and uniformly dispersed when contacting the heat exchange pipe row, a continuous water film is formed to cover the whole heat exchange surface, and the heat exchange efficiency is improved.

[0028] According to some embodiments of the present application, the volume of the first accommodating cavity is V1, the volume of the second accommodating cavity is V2, and V1:V2≥3 is satisfied. The larger first accommodating cavity can effectively store and buffer the incoming cooling water, ensure the smooth and continuous water supply process, avoid uneven water distribution caused by water flow fluctuations, and realize accurate distribution and uniform outflow of cooling water. Since the volume of the second accommodating cavity is small, the water flow speed inside is relatively fast, which helps the cooling water to pass through the water distribution channel more efficiently and be guided to the surface of the heat exchange pipe row by the guide vane, forming a more uniform water film distribution.

[0029] The control method according to the second aspect of the present application comprises the energy-saving tower heat exchange device according to the first aspect of the present application, wherein the control method comprises:

[0030] S1. Real-time monitoring of the temperature and environmental parameters of the corresponding area of each heat exchanger;

[0031] S2. When the temperature of the corresponding area of any heat exchanger exceeds the preset second temperature threshold, the control of the refrigerant supply component is started to open the refrigerant supply of the heat exchanger;

[0032] S3. If the heat exchange device is applied to a cold storage, the cold storage dedicated control logic is executed:

[0033] (a) When the temperature of the first heat exchanger (door area) is higher than the second temperature threshold, start its refrigerant supply;

[0034] (b) When the wind speed from the second heat exchanger (central area) to the first heat exchanger is detected to exceed 3 m / s and the central area temperature is lower than the first temperature threshold, the refrigerant supply of the second heat exchanger is forced to be maintained;

[0035] (c) Real-time monitoring of the refrigerant pressure, if the pressure is lower than the dynamic threshold, preferentially cut off the refrigerant supply of the second heat exchanger;

[0036] S4. If the heat exchange device is applied to an outdoor power facility, the power facility dedicated control logic is executed:

[0037] (a) When the temperature of the first heat exchanger (solar direct radiation side) exceeds the second temperature threshold, start its refrigerant supply;

[0038] (b) When the wind speed exceeds 4 m / s and the second heat exchanger (shady side) temperature rises more than 5℃ within 10 minutes, the refrigerant supply of the second heat exchanger is forced to be started;

[0039] (c) If the refrigerant pressure is insufficient, the second heat exchanger is intermittently started and stopped according to a preset period (≤30 seconds);

[0040] S5. When any of the following conditions is met, the refrigerant supply of the corresponding heat exchanger is turned off:

[0041] (a) temperature falls below the first temperature threshold value;

[0042] (b) wind speed is lower than the scene setting threshold value (cold storage: 2 m / s; power facility: 2 m / s);

[0043] (c) the cold storage door body is continuously closed for more than 30 seconds;

[0044] S6. When the pressure difference between the two ends of the filter cartridge exceeds 200Pa or the refrigerant pressure lasts for more than 5 seconds, a maintenance warning signal is generated and sent to the user terminal.

[0045] The control method according to the embodiment of the application has at least the following beneficial effects: by monitoring the temperature and environmental parameters (such as wind speed, refrigerant pressure, etc.) of the corresponding area of each heat exchanger in real time, and dynamically controlling the start and stop of the refrigerant supply component according to the preset temperature threshold value, on-demand cooling is realized, unnecessary energy waste is avoided, and the overall energy efficiency level of the system is effectively improved; the control method respectively sets cold storage special control logic and outdoor power facility special control logic. For example, in the cold storage, the local temperature rise and air flow disturbance caused by frequent opening and closing of the door body are considered; in the outdoor power facility, the sunlight direct radiation and wind-induced heat transfer effect are mainly dealt with. This differentiated control strategy significantly improves the adaptability and operation reliability of the device under various complex working conditions; when the pressure difference between the two ends of the filter cartridge exceeds 200Pa or the refrigerant pressure abnormal duration exceeds the set threshold value (such as 5 seconds), the controller generates a maintenance warning signal and sends it to the user terminal, reminding the operator to clean the filter screen or check the refrigerant system state in time. This function helps to discover potential fault risks in advance, reduces sudden stop, and improves the safety and maintenance efficiency of system operation.

[0046] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0047] The application will be further described below in conjunction with the drawings and examples, wherein:

[0048] Figure 1 It is a schematic diagram of the connection of the heat exchange component and the filter cartridge of the embodiment of the application;

[0049] Figure 2 It is an assembly schematic diagram of the heat exchange component and the water distribution pipe row of the embodiment of the application;

[0050] Figure 3 It is a working schematic diagram of the refrigerant conveying assembly of the embodiment of the application;

[0051] Figure 4 It is a schematic diagram of the first and second heat sinks of the embodiment of the application;

[0052] Figure 5 A schematic view of a water distribution pipe row according to an embodiment of the present application;

[0053] Figure 6 A schematic view of a water distribution pipe row according to an embodiment of the present application; Figure 5 An enlarged schematic view of A in FIG. 4.

[0054] Reference numerals: heat exchanger 100; liquid outlet pipe 120; filter cartridge 130; water distribution pipe row 140; refrigerant supply member 150; first heat exchanger 160; second heat exchanger 170; first heat exchange fin 180; second heat exchange fin 190; first heat exchange fin 200; second heat exchange fin 210; first accommodation cavity 220; second accommodation cavity 230; water guide hole 240; flow guide fin 250; first slot 260; second slot 270; secondary water supply hole 280. DETAILED DESCRIPTION

[0055] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or similar components have the same or similar designations throughout the several figures of the drawings and any description set forth herein. The embodiments described below are presented by way of example only and are not intended to limit the present application as described herein.

[0056] In the description of the present application, it is to be understood that the orientation description, such as up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0057] In the description of the present application, several means one or more, and multiple means two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first, second, etc. are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0058] In the description of the present application, unless otherwise explicitly defined, the words such as arrangement, installation, connection, etc. should be understood broadly, and the person skilled in the art can determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution. In the description of the present application, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In the description of the present application, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0059] In the prior art, the tower heat exchange device generally has the problems of low heat exchange efficiency and large energy consumption. The traditional equipment adopts a fixed heat exchange structure, which cannot dynamically adjust the heat exchange intensity according to the actual working condition, resulting in serious energy waste. Especially in the scene where the environmental temperature is unevenly distributed, the fixed refrigerant supply mode will cause the coexistence of regional overcooling and insufficient heat exchange. For example, in the application of cold storage, the temperature difference between the door body area and the central area inside is significant, and the existing equipment is difficult to realize precise temperature control adjustment.

[0060] Therefore, the present application provides an energy-saving tower heat exchange device, which comprises a heat exchange component, a refrigerant supply component 150 and a controller. The heat exchange component comprises a first heat exchanger 160 and a second heat exchanger 170, and the refrigerant supply component 150 is selectively connected with the two through a fluid pipeline. The controller is provided with a first temperature sensor and a second temperature sensor arranged on the outer wall of the heat exchanger 100, which can obtain the detection temperature in real time and control the refrigerant on-off.

[0061] The heat exchange component refers to a partition temperature control structure with independent heat exchange function, which can be implemented by a plate heat exchanger 100 or a tube-fin heat exchanger 100, and the partition setting can be adjusted differently for different temperature zones. The refrigerant supply component 150 refers to a circulating system with a flow control valve, which specifically uses an electromagnetic three-way valve to switch the refrigerant path, and ensures that the refrigerant is distributed on demand by selective conduction. The controller refers to a control unit with data processing capability, which can be implemented by a PLC or an embedded controller, and the temperature data of the heat exchange area is collected in real time by a temperature sensor. The first temperature threshold refers to the minimum temperature critical value for maintaining normal operation of the equipment, and the second temperature threshold refers to the temperature critical value at which cooling needs to be started, and the specific value can be set according to the application scenario.

[0062] Specifically, when the temperature of the area corresponding to a certain heat exchanger 100 is lower than the first temperature threshold, the controller immediately cuts off the refrigerant supply of the area to prevent energy waste caused by excessive cooling. When the temperature rises to the second temperature threshold, the controller reopens the refrigerant supply to ensure timely response to heat exchange requirements. This dynamic control mechanism accurately senses the actual temperature change of the heat exchange area through an external temperature sensor, and combines a double-threshold judgment logic to realize precise start-stop control of the refrigerant supply. In the cold storage application scenario, the door area and the top central area are respectively configured with independent heat exchangers 100, and when the local temperature rises due to frequent opening of the door, the system only starts the refrigerant supply of the corresponding area to avoid unnecessary cooling of the entire storage area.

[0063] Compared with the prior art, the traditional device uses a whole heat exchange structure and a fixed refrigerant flow, which cannot cope with local temperature fluctuations. The present scheme realizes dynamic distribution of refrigerant flow through the cooperation of the partitioned heat exchanger 100 and the intelligent control system. The temperature sensor is arranged on the outer wall of the heat exchanger 100, which improves the accuracy of temperature monitoring.

[0064] Through the above technical scheme, the present application effectively solves the problem of energy waste caused by uneven regional temperature, and realizes precise regulation and control of refrigerant supply. The partition temperature control structure avoids energy loss caused by overall cooling, and the double-threshold control strategy reduces the number of equipment start-stop while ensuring heat exchange effect. The external temperature sensor improves the operating efficiency of the heat exchange system.

[0065] The application further proposes an implementation of the energy-saving tower heat exchanger in the cold storage scenario. In this implementation, the first heat exchanger 160 is arranged in the area above the cold storage door body, and the second heat exchanger 170 is arranged in the central area of the top of the cold storage. The first temperature sensor is used to monitor the temperature of the door body position, the second temperature sensor is used to monitor the temperature of the central area in the storage, and the wind speed sensor is arranged in the air flow channel between the central area and the door body. When the temperature of the area above the door body exceeds the preset threshold, the refrigerant supply of the first heat exchanger 160 is started. If the temperature of the central area in the storage has reached the standard at this time, but the wind speed is detected to exceed 3 m / s and the air flow direction points to the door body, the refrigerant supply of the second heat exchanger 170 is forced to be maintained. When the wind speed is reduced to below 2 m / s, the temperature of the door area reaches the standard, or the door body is closed for more than 30 seconds, the refrigerant supply of the second heat exchanger 170 is turned off.

[0066] Specifically, when the cold storage door body is frequently opened, the external hot air first invades the area above the door body. The first heat exchanger 160 arranged in this area triggers the refrigerant supply through the temperature sensor, forming a local cooling barrier. At the same time, the second heat exchanger 170 in the central area of the storage should stop cooling after the temperature reaches the standard, but when a high-speed airflow is detected from the central area to the door body through the wind speed sensor, it is judged that there is a risk of cold air escape, and the operation of the second heat exchanger 170 is forced to be maintained to form a reverse cold air curtain. After the door body is closed for more than 30 seconds, the system automatically terminates the forced operation of the second heat exchanger 170 to avoid overcooling caused by the stop of the airflow.

[0067] Compared with the prior art, the traditional cold storage heat exchange system only controls the refrigerant supply according to the temperature of a single area, and cannot cope with the dynamic airflow change when the door is opened. The present scheme breaks through the control limitation of the static temperature threshold by setting three groups of sensors to build a multi-dimensional monitoring system and introducing compensation control of airflow direction and speed on the basis of temperature control.

[0068] Through the above technical scheme, the technical problem of imbalance of cold and heat distribution between the door area and the central area of the cold storage is effectively solved. By arranging the heat exchanger 100 and the sensor network in a targeted manner, the collaborative control of refrigerant supply and airflow disturbance is realized, which ensures the stability of the temperature in the core area of the storage while reducing the loss of cold energy caused by draught. The forced maintenance mechanism and the multiple closing conditions are used in cooperation, so that the system can cope with the sudden heat load impact and avoid unnecessary energy consumption in the low-temperature area.

[0069] The application further proposes an energy-saving tower heat exchange device applied to outdoor power facilities, which comprises a first heat exchanger 160 arranged on the side of the solar direct radiation surface of the power equipment, a second heat exchanger 170 arranged on the shady side, and a wind speed sensor arranged on the top of the equipment. When the first temperature sensor detects that the temperature on the side of the solar direct radiation surface is higher than the set threshold, the refrigerant supply of the first heat exchanger 160 is started; when the wind speed exceeds the threshold and the temperature on the shady side rises by more than the safe threshold within the set time, the refrigerant supply of the second heat exchanger 170 is forcibly started; when the wind speed falls below the threshold and the temperature on the shady side meets the standard, the refrigerant supply of the second heat exchanger 170 is stopped.

[0070] Specifically, when the temperature on the side of the solar direct radiation surface exceeds the preset upper limit, the first heat exchanger 160 is automatically started to offset the solar radiation heat load. When the wind speed exceeds the safe threshold and the temperature on the shady side rises sharply within a short time, the system identifies that the harmful wind disturbance causes the heat dissipation efficiency to decrease, at this time, the second heat exchanger 170 is forcibly started to supplement the heat dissipation capacity. When the wind speed weakens to the safe range and the temperature on the shady side is stable, the system automatically stops the operation of the second heat exchanger 170 to save the refrigerant consumption. The scheme can effectively distinguish between natural heat dissipation wind and destructive disturbance by jointly analyzing the temperature change rate and wind speed vector data, and only starts the auxiliary heat exchanger 100 when it is really needed, avoiding the misoperation caused by single wind speed triggering in the traditional scheme.

[0071] Compared with the prior art, the traditional power equipment heat dissipation device usually only controls the refrigerant supply according to the local temperature threshold, and cannot identify the influence of the wind speed direction on the heat dissipation efficiency. For example, in the prior art, when a high wind speed is detected, it may be misjudged as beneficial heat dissipation conditions and cooling is stopped, but in fact, the lateral strong wind will disturb the normal convection path. The scheme can accurately identify the harmful wind field that causes the heat exchange efficiency to decrease and start the compensation cooling in time by introducing the wind speed vector detection and temperature change rate double judgment mechanism. Through the above technical scheme, the application solves the problem of local overheating of outdoor power facilities caused by complex wind field disturbance, and effectively prevents the temperature of the shady area from rising sharply due to harmful wind speed.

[0072] The application further proposes that a pressure sensor is arranged in the liquid outlet pipeline 120 of the refrigerant supply component 150, and the pressure sensor is electrically connected with the controller; when the second heat exchanger 170 is forcibly maintained to supply cold due to the wind speed condition, if the refrigerant supply pressure of the first heat exchanger 160 is insufficient, the refrigerant supply component 150 preferentially allocates refrigerant resources to the first heat exchanger 160.

[0073] Specifically, in the forced cooling mode, the continuous operation of the second heat exchanger 170 can cause the refrigerant delivery pressure to be dispersed. The pressure sensor collects the fluid pressure value in the outlet pipe 120 in real time and transmits the data to the controller for dynamic analysis. When the core area where the first heat exchanger 160 is located has insufficient pressure, the controller immediately triggers the priority judgment program, and by closing the electromagnetic valve of the second heat exchanger 170 or adjusting the flow direction of the three-way valve, the refrigerant is concentrated and delivered to the first heat exchanger 160. This process is achieved through pressure threshold comparison and logical operation, ensuring that the heat exchange demand of the key area is met first when the total system pressure is limited.

[0074] Compared with the prior art, the conventional scheme lacks a dynamic monitoring mechanism for the refrigerant delivery pressure and cannot identify the pressure distribution imbalance problem when multiple heat exchangers 100 work in parallel. The existing equipment usually uses fixed flow distribution or simple time sequence control, which causes the refrigerant resources to be unable to be flexibly allocated according to the actual working conditions. The present scheme realizes real-time optimization and distribution of the refrigerant delivery pressure by constructing a pressure feedback closed-loop control system.

[0075] Through the above technical scheme, the present application effectively solves the problem of refrigerant pressure distribution imbalance in the forced cooling mode, and avoids the phenomenon of insufficient system pressure caused by simultaneous cooling of multiple areas. The heat exchanger 100 in the core area obtains stable refrigerant supply guarantee, prevents temperature runaway caused by cooling interruption in the key position, and overall improves the operation reliability of the heat exchange device under complex working conditions.

[0076] The present application further proposes that the refrigerant supply component 150 further comprises a filter cartridge 130, the filter cartridge 130 is arranged in the outlet pipe 120 of the refrigerant supply component 150, both ends of the filter cartridge 130 are connected with the outlet pipe 120 through flanges, and a V-shaped filter screen is arranged in the filter cartridge 130.

[0077] Among them, the flange connection refers to using a flange plate with bolt holes as a pipe connecting piece, which can be sealed by combining a carbon steel flange with a rubber sealing gasket. This connection method not only ensures the pressure-bearing requirement of the pipe but also facilitates disassembly and maintenance. The V-shaped filter screen refers to a structure formed by folding multiple metal wire meshes at an angle, which can be composed of a 60-degree angle corrugated stainless steel mesh. Through asymmetric layout, the fluid path is deflected, which increases the filtering area while guiding impurities to deposit at the mesh angle.

[0078] Specifically, when the refrigerant flows through the filter cartridge 130 from the liquid outlet pipe 120, the V-shaped filter screen forces the fluid to change direction, and the solid particles collide with the screen surface under the action of inertia and are captured. The V-shaped channel formed by the screen angle can avoid the direct accumulation of impurities in the vertical direction, and maintain the effective filtering area. When cleaning is needed, the filter cartridge 130 can be removed as a whole by loosening the flange bolts for flushing or replacement. During the refrigerant circulation process, the corrugated structure of the V-shaped screen can generate local turbulence to flush the particles adhering to the screen, prolonging the service life of the filter element.

[0079] Compared with the prior art, the traditional tower heat exchange device adopts a flat disc filter screen, which is easily covered by impurities, causing a sudden increase in pressure drop, and the entire pipeline needs to be disassembled for maintenance. The V-shaped angle screen realizes three-dimensional filtering space expansion, which increases the effective filtering area by about 40% under the same volume, and the flange connection structure shortens the maintenance operation time to 1 / 3 of the traditional way.

[0080] Through the above technical solutions, the application effectively intercepts metal debris, scale and other solid impurities in the refrigerant, avoids the heat transfer efficiency decline caused by the flow passage blockage of the heat exchanger 100, and prevents the impurities from wearing the precision components such as pumps and valves. The modular flange connection design greatly shortens the maintenance cycle of the filter device, significantly improving the system operation stability. The self-cleaning feature of the V-shaped screen can reduce the replacement frequency of the filter element by about 50%, and still maintain stable filtering performance under high temperature and high pressure conditions.

[0081] Reference Figure 4 and Figure 6 The application further proposes a first heat exchange sheet 180 and a second heat exchange sheet 190 arranged in a stack, the first heat exchange sheet 180 is provided with a first slot 260, and the second heat exchange sheet 190 is provided with a second slot 270, and the projection part of the first slot 260 and the second slot 270 along the depth direction overlaps or completely overlaps.

[0082] Wherein, the stack arrangement refers to assembling two heat exchange sheets in a parallel stacking manner, which can be realized by stamping aluminum alloy plates and then fixed by bolts. The first slot 260 refers to a through hole formed on the surface of the first heat exchange sheet 180, which can be realized by a rectangular or corrugated slot. The second slot 270 is arranged on the second heat exchange sheet 190 in the same way as the first slot 260, and its position is spatially offset from the first slot 260. The overlapping projection part means that the two slots have an overlapping area on the vertical projection plane, and the complete overlap means that there is no overlapping area on the projection plane.

[0083] Specifically, when the first heat exchange sheet 180 and the second heat exchange sheet 190 are stacked and assembled, in the state of the projection part overlapping, the cooling water can flow through the overlapping area of the two grooves at the same time, so that the heat dissipation area on the back of the first heat exchange sheet 180 is exposed by the second groove 270, and the heat dissipation area on the back of the second heat exchange sheet 190 is exposed by the first groove 260. When the grooves are completely staggered, the cooling water needs to flow through the back of the two heat exchange sheets respectively. The structure of the double-groove staggered arrangement increases the heat exchange area of the heat exchange sheet, so that the hidden heat dissipation area of the two stacked heat dissipation sheets can also participate in the heat exchange process.

[0084] Compared with the prior art, the traditional tower type heat exchange device adopts a symmetrical groove structure, the cooling water flow path is fixed and the contact area is limited, and heat exchange unevenness is easily formed. The present scheme increases the contact area of the cooling water and the heat exchange sheet under the same volume through the stacked groove structure, and fully utilizes the heat dissipation area on the back of the heat exchange sheet by staggering the positions of the grooves, thereby greatly improving the heat dissipation efficiency.

[0085] Through the above technical scheme, the present application realizes uniform distribution of fluid on the surface and back of the heat exchange sheet, reduces local overheating or supercooling phenomenon, and improves heat exchange efficiency.

[0086] The present application further provides that the first heat exchange sheet 180 is provided with a first heat exchange fin 200, the first heat exchange fin 200 is arranged on one side of the first groove 260 in the length direction, the second heat exchange sheet 190 is provided with a second heat exchange fin 210, the second heat exchange fin 210 is arranged on one side of the second groove 270 in the length direction, the first heat exchange fin 200 is arranged in a direction away from the first heat exchange sheet 180, and the second heat exchange fin 210 is arranged in a direction away from the second heat exchange sheet 190.

[0087] The first heat exchange fin 200 refers to a plate-shaped structure attached to the surface of the first heat exchange sheet 180 and extending on one side along the length direction of the groove. Specifically, it can be integrally formed with the heat exchange sheet by stamping forming process, and the inclination angle away from the body can be set to 20-45 degrees, thereby increasing the contact area with the fluid and accelerating heat transfer. The second heat exchange fin 210 is formed on the second heat exchange sheet 190 in the same way, and the inclination direction forms a spatial staggered layout with the first heat exchange fin 200, thereby forming an asymmetric flow channel after stacking and assembling.

[0088] Specifically, when the cooling water flows through the heat exchange sheet, the first heat exchange fin 200 and the second heat exchange fin 210 form a flow guide barrier on one side of the respective groove respectively. Crossed flow channels can be formed, so that different levels of fluid generate turbulent flow effect at the intersection. The inclination angle of the fin can guide the fluid to form a component flow in the vertical direction, thereby greatly improving the heat exchange efficiency.

[0089] The application further proposes that the heat exchange component further comprises a water distribution pipe row 140 clamped above the first heat exchange fin 180 and the second heat exchange fin 190, the water distribution pipe row 140 comprises a first accommodating cavity 220 and a second accommodating cavity 230, the first accommodating cavity 220 and the second accommodating cavity 230 are arranged along the length direction of the water distribution pipe row 140, one end of the water distribution pipe row 140 is connected with a water supply pipe, a water guide hole 240 is arranged between the first accommodating cavity 220 and the second accommodating cavity 230, the water guide hole 240 is arranged at the bottom of the first accommodating cavity 220, and the inner side walls of the second accommodating cavity 230 abut against the first heat exchange fin 180 and the second heat exchange fin 190 respectively.

[0090] Among them, the water distribution pipe row 140 refers to the water supply structure arranged at the top of the heat exchange fin, which can be realized by an aluminum or copper pipe body with double cavities arranged inside, for guiding the water flow to be distributed along the surface of the heat exchange fin. The first accommodating cavity 220 refers to a water storage chamber close to the inlet of the water supply pipe, which can be realized by a pipe cavity structure with a cross-sectional area larger than that of the second accommodating cavity 230, for temporarily storing the input water flow and buffering pressure fluctuation. The second accommodating cavity 230 refers to a water distribution chamber directly contacting the heat exchange fin, which can be realized by a flat pipe cavity structure extending along the length direction, for uniformly guiding the water flow to the surface of the heat exchange fin. The water guide hole 240 refers to a water passing channel connecting the two cavities, which can be realized by a circular or elliptical through hole arranged at the bottom of the first accommodating cavity 220, for facilitating the water flow to naturally flow down to the second accommodating cavity 230 by gravity.

[0091] Specifically, after the water supply pipe injects the water flow into the first accommodating cavity 220, the water flow is temporarily stored in the cavity. Since the volume of the first accommodating cavity 220 is significantly larger than that of the second accommodating cavity 230, the water flow forms a pressure buffer before entering the water guide hole 240, avoiding that the water supply pressure fluctuation directly affects the water distribution process. The water guide hole 240 is located at the bottom of the first accommodating cavity 220, the water flow uniformly flows into the second accommodating cavity 230 by gravity, and spreads along the length direction in the flat space of the second accommodating cavity 230. The inner side walls of the second accommodating cavity 230 are in close contact with the heat exchange fin, the water flow directly wets the surface of the heat exchange fin through the contact surface, avoiding the water flow to be lost in the non-contact area.

[0092] The traditional water distributor adopts a single-cavity straight-through structure, which leads to insufficient water pressure at the end of the water distribution pipe. The present scheme realizes secondary water distribution by setting a double-cavity structure, the first accommodating cavity 220 buffers the water flow pressure fluctuation, and the second accommodating cavity 230 maintains the end water distribution pressure by gravity, ensuring the uniformity of water distribution along the length direction of the heat exchange fin.

[0093] The problem of uneven water distribution caused by insufficient water pressure at the end of the water distribution pipe is solved, the pressure buffer and secondary water distribution are formed by the double-cavity structure, the water flow forms stable coverage on the surface of the heat exchange fin, and the evaporation heat exchange efficiency is improved.

[0094] The application further provides a technical scheme in which the volume ratio of the first accommodating cavity 220 to the second accommodating cavity 230 in the water distribution pipe row 140 is V1:V2≥3.

[0095] Specifically, after the water supply pipe injects water flow into the first accommodating cavity 220, the large volume of the first accommodating cavity 220 forms a water storage buffer, and the water flow enters the second accommodating cavity 230 at a constant flow rate under the action of gravity through the bottom water guide hole 240. Because the second accommodating cavity 230 has a small volume and the side wall directly contacts the heat exchange sheet, the water flow uniformly penetrates to the surface of the heat exchange sheet through capillary action after forming a stable pressure in the second accommodating cavity 230. When the ratio of V1 to V2 reaches 3:1, the amount of water stored in the first accommodating cavity 220 can maintain the second accommodating cavity 230 to continuously wet the heat exchange sheet during the interval between two water supplies, avoiding local dryness caused by instantaneous flow fluctuation.

[0096] The traditional water distribution pipe row 140 adopts a single cavity or an equal-volume double-cavity structure, and the water flow directly impacts the heat exchange sheet without grading and buffering, which is easy to cause overflow in the edge area and insufficient wetting in the center area. The present scheme forms two-stage water flow control through differential volume design, the first accommodating cavity 220 undertakes pressure buffering function, and the second accommodating cavity 230 performs uniform distribution function, solving the problem of liquid film rupture caused by water flow impact.

[0097] Reference Figure 5 In some embodiments, a plurality of flow guide fins 250 are arranged on the inner side wall of the second accommodating cavity 230, the plurality of flow guide fins 250 are arranged at intervals along the length direction of the second accommodating cavity 230, and the tip of each flow guide fin 250 is arranged towards the water outlet end of the second accommodating cavity 230. This design can effectively split and guide the water flow, break the surface tension of the water flow, and thus form a more uniform and continuous water film on the surface of the heat exchange sheet, improving the evaporative cooling effect. In other embodiments, a secondary water supplement hole 280 can also be arranged in the middle of the water distribution pipe row 140 to ensure that sufficient water pressure is maintained in the first accommodating cavity 220. This design helps to ensure that the water flow stably flows from the first accommodating cavity 220 to the second accommodating cavity 230 through the water guide hole 240, and thus ensures that a uniform and continuous water film can be formed on the surface of the heat exchange sheet, improving the overall heat exchange efficiency.

[0098] The application further provides a control method of the energy-saving tower heat exchange device, including the following steps: monitoring the temperature and environmental parameters of the area corresponding to each heat exchanger 100 in real time; when the temperature of the area corresponding to any heat exchanger 100 exceeds a preset second temperature threshold, controlling the refrigerant supply component 150 to open the refrigerant supply of the heat exchanger 100; according to the application scene, executing special control logic, in the cold storage scene, forcibly maintaining the heat exchange demand under high wind speed in combination with the wind speed and temperature coupling relationship, and preferentially guaranteeing the supply of the key area, in the power facility scene, triggering emergency cooling through temperature sudden change monitoring and wind speed chain, and relieving the pressure shortage contradiction by using the preferential supply mode; when the temperature falls below the first temperature threshold, the wind speed is lower than the scene setting threshold, or the cold storage door body is continuously closed for more than 30 seconds, the refrigerant supply of the corresponding heat exchanger 100 is closed; a maintenance alarm signal is generated and sent to the user terminal.

[0099] Specifically, the method realizes dynamic regulation and control through multi-sensor data fusion. In the cold storage application scene, after the refrigerant supply is triggered when the door area temperature rises, if the central area is detected to have low temperature but high-speed airflow exists, the refrigerant supply of the area is forcibly maintained to avoid temperature imbalance caused by airflow scouring, and the heat exchange demand of the key parts of the door area is preferentially guaranteed through refrigerant pressure monitoring. In the outdoor power facility scene, when the temperature of the directly irradiated surface is abnormal, emergency cooling is started, when the temperature of the shady surface is detected to suddenly rise and is accompanied by strong wind, emergency compensation cooling is used to meet the heat exchange demand.

[0100] Compared with the prior art, the traditional control method only relies on a single temperature parameter for on-off control, and cannot cope with dynamic changes in complex environments. The method solves the problem of misjudgment caused by airflow disturbance by establishing a wind speed and temperature linkage mechanism; precise regulation and control are implemented for special working conditions such as frequent opening of the cold storage door and sudden temperature rise of the power equipment by setting scene-based control logic; the intermittent start-stop strategy effectively alleviates the risk of equipment overload when the refrigerant pressure is insufficient, and the prior art lacks such pressure adaptive control means.

[0101] Through the above technical solutions, the application effectively solves the problem of high energy consumption caused by fixed refrigerant supply of the traditional heat exchange device, and realizes dynamic energy-saving control in different application scenes. In the cold storage scene, the loss of cold energy caused by frequent opening of the door is avoided, and in the power facility scene, the overheating of the equipment caused by sudden temperature rise is prevented, and the service life of the equipment is prolonged through the pressure adaptive mechanism, and the probability of failure shutdown caused by system overload is reduced. The maintenance alarm function predicts system abnormalities in advance, and significantly reduces the risk of equipment sudden failure.

[0102] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A control method of an energy saving tower heat exchanger apparatus, characterized by, The application is applied to an energy-saving tower heat exchange device, and the energy-saving tower heat exchange device comprises: a heat exchange component comprising a first heat exchanger and a second heat exchanger; a refrigerant supply component in selective conduction connection with the first heat exchanger and the second heat exchanger through a fluid pipeline; a controller comprising a first temperature sensor, a second temperature sensor and a wind speed sensor, wherein the first temperature sensor is arranged on the outer side wall of the first heat exchanger, and the second temperature sensor is arranged on the outer side wall of the second heat exchanger; wherein the controller obtains the detection temperatures of the first temperature sensor and the second temperature sensor in real time, and when the temperature value of the region corresponding to any heat exchanger is lower than a preset first temperature threshold, the controller controls the refrigerant supply component to cut off the refrigerant supply to the heat exchanger, and when the temperature of the region corresponding to any heat exchanger is higher than a preset second temperature threshold, the controller controls the refrigerant supply component to restore the refrigerant supply to the heat exchanger; when applied to a cold storage, the first heat exchanger is arranged in the region above the door body of the cold storage, the second heat exchanger is arranged in the central region of the top of the cold storage, the first temperature sensor is used for detecting the temperature of the position of the door body of the cold storage, the second temperature sensor is used for detecting the temperature of the central region inside the cold storage, and the wind speed sensor is arranged in the air flow channel between the central region of the cold storage and the door body; wherein (1) when the first temperature sensor detects that the temperature of the region above the door body of the cold storage is higher than the second temperature threshold, the refrigerant supply of the first heat exchanger is started; (2) if the second temperature sensor detects that the temperature of the central region of the top of the cold storage is lower than the first temperature threshold at this time, but the wind speed sensor detects that the current wind direction is from the second heat exchanger to the first heat exchanger, and the wind speed value exceeds 3 m / s, the refrigerant supply of the second heat exchanger is forced to be maintained; (3) when any of the following conditions is met, the refrigerant supply of the second heat exchanger is turned off: the wind speed value falls to 2 m / s or below; the temperature of the region corresponding to the first heat exchanger falls to the first temperature threshold or below; the closed state of the door body of the cold storage lasts for more than 30 seconds.

2. A control method of an energy saving tower heat exchanger, characterized by, The application is applied to an energy-saving tower heat exchange device, and the energy-saving tower heat exchange device comprises: a heat exchange component comprising a first heat exchanger and a second heat exchanger; a refrigerant supply component in selective conduction connection with the first heat exchanger and the second heat exchanger through a fluid pipeline; a controller comprising a first temperature sensor, a second temperature sensor and a wind speed sensor, wherein the first temperature sensor is arranged on the outer side wall of the first heat exchanger, and the second temperature sensor is arranged on the outer side wall of the second heat exchanger; The controller acquires the detection temperature of the first temperature sensor and the second temperature sensor in real time, controls the refrigerant supply component to cut off the refrigerant supply to the heat exchanger when the temperature of the corresponding area of any heat exchanger is lower than the preset first temperature threshold, and controls the refrigerant supply component to restore the refrigerant supply to the heat exchanger when the temperature of the corresponding area of any heat exchanger is higher than the preset second temperature threshold; when applied to outdoor power facilities, the first heat exchanger is arranged on the side of the power equipment directly exposed to the sun, the second heat exchanger is arranged on the side of the power equipment away from the sun, and the wind speed sensor is arranged on the top of the power equipment to detect the real-time wind speed. Wherein: (1) when the first temperature sensor detects that the temperature on the side directly exposed to the sun is higher than the second temperature threshold, the refrigerant supply of the first heat exchanger is started; (2) if the real-time wind speed detected by the wind speed sensor exceeds 4 m / s, and the temperature of the corresponding area of the second heat exchanger detected by the second temperature sensor rises by more than 5℃ within 10 minutes, the refrigerant supply of the second heat exchanger is forcibly started; (3) when the real-time wind speed falls below 2 m / s and the temperature of the corresponding area of the second heat exchanger is lower than the first temperature threshold, the refrigerant supply of the second heat exchanger is turned off.

3. The control method of an energy-saving tower heat exchanger according to claim 2, characterized in that, The controller further comprises a pressure sensor arranged in the liquid outlet pipeline of the refrigerant supply component and electrically connected with the controller; When the second heat exchanger is forcibly supplied with cold air due to wind speed, if the refrigerant supply pressure of the first heat exchanger is insufficient, the refrigerant supply component preferentially supplies the first heat exchanger.

4. The control method of an energy-saving tower heat exchanger according to claim 2, characterized in that, The refrigerant supply component further comprises a filter cartridge arranged in the liquid outlet pipeline of the refrigerant supply component, both ends of the filter cartridge are connected with the liquid outlet pipeline through flanges, and a V-shaped filter screen is arranged in the filter cartridge.

5. The control method of an energy-saving tower heat exchanger according to claim 2, characterized in that, The heat exchange device comprises first heat exchange fins and second heat exchange fins arranged in layers, the first heat exchange fins are provided with first slots, the second heat exchange fins are provided with second slots, and the projections of the first slots and the second slots along the depth direction are partially overlapped or completely staggered.

6. The control method of an energy-saving tower heat exchanger according to claim 5, characterized in that, The first heat exchange fins are provided with first heat exchange fins arranged on one side of the length direction of the first slots, the second heat exchange fins are provided with second heat exchange fins arranged on one side of the length direction of the second slots, the first heat exchange fins are arranged in a direction away from the first heat exchange fins, and the second heat exchange fins are arranged in a direction away from the second heat exchange fins.

7. The control method of an energy-saving tower heat exchanger according to claim 5, characterized in that, The heat exchange component further comprises a water distribution pipe row clamped above the first heat exchange fins and the second heat exchange fins, the water distribution pipe row comprises a first accommodating cavity and a second accommodating cavity, the first accommodating cavity and the second accommodating cavity are arranged in extension along the length direction of the water distribution pipe row, one end of the water distribution pipe row is connected with a water supply pipe, a water guide hole is arranged between the first accommodating cavity and the second accommodating cavity, the water guide hole is arranged at the bottom of the first accommodating cavity, and the inner side walls of the second accommodating cavity respectively abut against the first heat exchange fins and the second heat exchange fins.

8. The control method of an energy-saving tower heat exchanger according to claim 7, characterized in that, The volume of the first accommodating cavity is V1, the volume of the second accommodating cavity is V2, and V1:V2≥3 is satisfied.

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