Backwashing device and heat exchange system
By designing the piping and reversing components, the rotation of the inner core enables the switching of liquid flow direction, solving the problems of complex backflushing operation and difficult piping layout in heat exchangers, simplifying the switching process and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-03-20
AI Technical Summary
Existing heat exchangers require additional valves and pipelines during backflushing, resulting in complicated switching operations, high costs, and difficult pipeline layout.
By employing piping and reversing components, the liquid flow direction is switched through the rotation of the inner core, simplifying the switching between normal cooling and backflushing states and reducing the difficulty of pipe usage and layout.
It enables simple and easy state switching, reduces costs and piping layout complexity, and improves operational efficiency.
Smart Images
Figure CN224018916U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of heat exchangers, in particular to a backwashing device and a heat exchange system. BACKGROUND
[0002] Heat exchangers are widely used in various industries, for example, in the field of shipbuilding and ocean engineering, seawater is often used as a heat exchange medium, and seawater is transported into a cooler to achieve the effect of heat exchange and cooling. After a period of operation, the flow direction of the heat exchange medium needs to be changed regularly, so that the heat exchange medium is used to backwash the inside of the heat exchanger, so as to achieve the effect of cleaning and reducing resistance.
[0003] In related technologies, in order to achieve the reverse flushing function, additional valves and pipelines are generally added, and multiple valves and multiple pipelines are used to achieve the purpose of reverse flushing. However, these additional valves make the switching operation between normal heat exchange and cooling conditions and reverse flushing conditions very troublesome, time-consuming and labor-intensive, and the additional pipelines require more space for arrangement, which leads to difficulties in arranging the heat exchanger peripheral equipment and pipelines, and higher costs. CONTENT OF THE UTILITY MODEL
[0004] Therefore, it is necessary to provide a backwashing device and a heat exchange system aiming at the above-mentioned technical problems.
[0005] A backwashing device, comprising:
[0006] A pipeline assembly, comprising a liquid supply pipeline, a liquid discharge pipeline, a heat exchanger second pipeline and a heat exchanger first pipeline, the heat exchanger second pipeline and the heat exchanger first pipeline are respectively configured to communicate with a heat exchanger; and
[0007] A reversing assembly, comprising a housing and an inner core, the inner core rotates in the housing and is sealingly connected with the housing, the inner core is provided with a first valve core channel and a second valve core channel which are not communicated with each other, the inner core has a normal cooling state and a backwashing state, the inner core is configured to, in the normal cooling state, communicate the liquid supply pipeline and the heat exchanger second pipeline through the first valve core channel, and communicate the liquid discharge pipeline and the heat exchanger first pipeline through the second valve core channel; and in the backwashing state, communicate the liquid supply pipeline and the heat exchanger first pipeline through the first valve core channel, and communicate the liquid discharge pipeline and the heat exchanger second pipeline through the second valve core channel.
[0008] In one of the embodiments, the housing is provided with a first channel, a second channel, a third channel and a fourth channel, the first channel communicates with the liquid supply pipeline, the second channel communicates with the liquid discharge pipeline, the third channel communicates with the heat exchanger second pipeline, and the fourth channel communicates with the heat exchanger first pipeline.
[0009] The inner core is configured to communicate the first passage and the third passage through the first core passage and communicate the second passage and the fourth passage through the second core passage in the normal cooling state, and communicate the first passage and the fourth passage through the first core passage and communicate the second passage and the third passage through the second core passage in the backwashing state.
[0010] In one of the embodiments, the shell has a valve cavity, and the valve cavity and the inner core are both spherical structures; and / or
[0011] The first core passage and the second core passage are both circular arc passages, and the central angle corresponding to the center line of the first core passage and the central angle corresponding to the center line of the second core passage are both less than 90°.
[0012] In one of the embodiments, the reversing assembly further comprises a driving member, the driving member is arranged through the side wall of the shell and connected with the inner core; and / or
[0013] The reversing assembly further comprises a sealing ring, the sealing ring is arranged between the shell and the inner core, the outer side of the sealing ring is connected with the shell, and the inner side of the sealing ring is in contact with the inner core.
[0014] In one of the embodiments, the driving member comprises a rotating shaft part and a rotating disc part, the rotating shaft part is arranged through the side wall of the shell, one end of the rotating shaft part is connected with the inner core, and the other end of the rotating shaft part is connected with the rotating disc part.
[0015] In one of the embodiments, the backwashing device further comprises a differential pressure sensor, the differential pressure sensor is connected with the second pipeline of the heat exchanger and the first pipeline of the heat exchanger, and the differential pressure sensor is electrically connected with the driving member.
[0016] In one of the embodiments, the backwashing device further comprises a liquid delivery power member, the liquid delivery power member is connected with the liquid supply pipeline.
[0017] In one of the embodiments, the backwashing device further comprises a first valve, the first valve is arranged on the second pipeline of the heat exchanger.
[0018] In one of the embodiments, the backwashing device further comprises a second valve, the second valve is arranged on the first pipeline of the heat exchanger.
[0019] A heat exchange system, the heat exchange system comprises:
[0020] a heat exchanger having an inlet and an outlet; and
[0021] The backwashing device of any one of the above, the second pipeline of the heat exchanger of the backwashing device and the first pipeline of the heat exchanger are respectively communicated with the outlet and the inlet.
[0022] The backwashing device and the heat exchange system, when the liquid needs to be transported to the heat exchanger for heat exchange, the movement of the inner core relative to the shell is controlled at this time, so that the first valve core passage of the inner core is communicated between the liquid supply pipeline and the second pipeline of the heat exchanger, and the second valve core passage of the inner core is communicated between the liquid discharge pipeline and the first pipeline of the heat exchanger, so that the inner core is in a normal cooling state. When the flow direction of the liquid transported to the heat exchanger needs to be changed for flushing, the movement of the inner core relative to the shell is controlled at this time, so that the first valve core passage of the inner core is communicated between the liquid supply pipeline and the first pipeline of the heat exchanger, and the second valve core passage of the inner core is communicated between the liquid discharge pipeline and the second pipeline of the heat exchanger, so that the inner core is in a backwashing state. Therefore, the flow direction of the liquid transported to the heat exchanger can be changed by the reversing assembly, the switching between the normal cooling state and the backwashing state is simpler and easier, the pipeline design is simplified, the use of pipe materials is reduced, the cost is reduced, and the difficulty of three-dimensional space arrangement of the pipeline is also reduced. The problems of troublesome switching operation and difficult pipeline arrangement between the normal cooling state and the backwashing state of the heat exchanger are solved. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 The backwashing device and the heat exchange system provided by the embodiment of the present application are in a normal cooling state.
[0024] Figure 2 The cross-sectional structure diagram of the reversing assembly in Figure 1
[0025] Figure 3 The backwashing device and the heat exchange system provided by the embodiment of the present application are in a backwashing state.
[0026] Figure 4 The backwashing device and the heat exchange system provided by another embodiment of the present application are in a backwashing state.
[0027] REFERENCE NUMERALS:
[0028] 1. A heat exchange system;
[0029] 10. A backwashing device;
[0030] 110. A liquid supply pipeline; 120. A liquid discharge pipeline; 130. A second pipeline of a heat exchanger; 140. A first pipeline of a heat exchanger;
[0031] 200, reversing assembly; 210, housing; 211, valve cavity; 212, first passage; 213, second passage; 214, third passage; 215, fourth passage; 220, inner core; 221, first valve core passage; 222, second valve core passage; 230, driving member; 231, rotating shaft part; 232, rotating disc part; 240, sealing ring;
[0032] 300, differential pressure sensor;
[0033] 400, infusion power member;
[0034] 500, first valve;
[0035] 600, second valve;
[0036] 20, heat exchanger. DETAILED DESCRIPTION
[0037] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details, and that the present application is not limited to the specific embodiments disclosed below.
[0038] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply 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 a limitation on the present application.
[0039] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0040] In the present application, unless specifically defined otherwise, if there are any terms "mount", "connect", "connect", "fix", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0041] In the present application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "second feature" and the like, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "on", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the first feature is less than the second feature in horizontal height.
[0042] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.
[0043] Reference Figure 1As shown in FIG. 1, a structure schematic diagram of the backwashing device 10 and the heat exchange system 1 in a normal cooling state is shown, the heat exchange system 1 provided by the embodiment of the present application comprises the heat exchanger 20 and the backwashing device 10. The heat exchanger 20 has an inlet and an outlet, for example, the heat exchanger 20 can be a plate cooler, the inlet is located at the bottom of the plate cooler, and the outlet is located at the top of the plate cooler. The backwashing device 10 is in communication with the inlet and the outlet of the heat exchanger 20 respectively, thereby forming a heat exchange medium conveying loop, wherein the heat exchange medium can be selected from a liquid such as seawater. The flow direction of the liquid conveyed to the heat exchanger 20 is changed by the backwashing device 10, thereby achieving the function of washing the heat exchanger 20, and the operation is simple. Specifically, the backwashing device 10 is used to provide liquid to the heat exchanger 20 in the normal cooling state, for example, the backwashing device 10 can convey seawater to the heat exchanger 20 as a cooling medium, thereby playing a role of heat exchange cooling. The backwashing device 10 is also used to change the flow direction of the seawater conveyed to the heat exchanger 20 in the backwashing state, thereby using seawater to backwash the inside of the heat exchanger 20, so as to achieve the effect of cleaning and reducing resistance.
[0044] Continuing to refer to Figure 1 As shown in FIG. 1, the backwashing device 10 comprises a pipeline assembly and a reversing assembly 200, the pipeline assembly is used to convey liquid, and the reversing assembly 200 is used to play a switching role between the normal cooling state and the backwashing state, thereby being able to convey liquid to the heat exchanger 20 to achieve the heat exchange function, and also being able to change the flow direction of the liquid to achieve the washing function.
[0045] The pipeline assembly comprises a liquid supply pipeline 110, a liquid discharge pipeline 120, a heat exchanger second pipeline 130 and a heat exchanger first pipeline 140. The liquid supply pipeline 110 is used to be connected to a liquid source, for example, the liquid supply pipeline 110 can be used to be in communication with seawater, thereby taking seawater as a heat exchange medium and a washing liquid. The liquid discharge pipeline 120 is used to discharge the liquid after heat exchange or washing, for example, the liquid discharge pipeline 120 can discharge the liquid after heat exchange or washing to the next process. The heat exchanger second pipeline 130 is in communication with the inlet of the heat exchanger 20, and the heat exchanger first pipeline 140 is in communication with the outlet of the heat exchanger 20. In the normal cooling state, the liquid in the heat exchanger second pipeline 130 enters the heat exchanger 20 from the inlet of the heat exchanger 20, and the liquid after completing heat exchange is discharged from the outlet of the heat exchanger 20 to the heat exchanger first pipeline 140. In the backwashing state, the liquid in the heat exchanger first pipeline 140 enters the heat exchanger 20 from the outlet of the heat exchanger 20, and the liquid after completing washing is discharged from the inlet of the heat exchanger 20 to the heat exchanger second pipeline 130.
[0046] The reversing assembly 200 comprises a shell 210 and an inner core 220, the shell 210 forms the outer contour of the reversing assembly 200 and is used to protect the inner core 220. The inner core 220 rotates in the shell 210 and is sealingly connected with the shell 210, and the inner core 220 is provided with a first valve core channel 221 and a second valve core channel 222 which are not communicated with each other. The inner core 220 has a normal cooling state and a backwashing state, and the inner core 220 is configured to communicate the liquid supply pipeline 110 and the heat exchanger second pipeline 130 through the first valve core channel 221 and communicate the liquid discharge pipeline 120 and the heat exchanger first pipeline 140 through the second valve core channel 222 in the normal cooling state, and communicate the liquid supply pipeline 110 and the heat exchanger first pipeline 140 through the first valve core channel 221 and communicate the liquid discharge pipeline 120 and the heat exchanger second pipeline 130 through the second valve core channel 222 in the backwashing state.
[0047] Through the above structural design, when it is needed to deliver liquid to the heat exchanger 20 for heat exchange, at this time the inner core 220 is controlled to move relative to the shell 210, so that the first valve core channel 221 of the inner core 220 is communicated between the liquid supply pipeline 110 and the heat exchanger second pipeline 130, and the second valve core channel 222 of the inner core 220 is communicated between the liquid discharge pipeline 120 and the heat exchanger first pipeline 140, so that the reversing assembly 200 is in the normal cooling state. When it is needed to change the flow direction of the liquid delivered to the heat exchanger 20 for flushing, at this time the inner core 220 is controlled to move relative to the shell 210, so that the first valve core channel 221 of the inner core 220 is communicated between the liquid supply pipeline 110 and the heat exchanger first pipeline 140, and the second valve core channel 222 of the inner core 220 is communicated between the liquid discharge pipeline 120 and the heat exchanger second pipeline 130, so that the reversing assembly 200 is in the backwashing state.
[0048] Therefore, in the embodiment of the present application, the flow direction of the liquid delivered to the heat exchanger 20 can be changed by the reversing assembly 200, the switching between the normal cooling state and the backwashing state is simpler and easier to implement, the pipeline design is simplified, the use of pipe materials is reduced, the cost is reduced, and the difficulty of three-dimensional space arrangement of the pipeline is also reduced, thereby solving the problems of troublesome switching operation and difficult pipeline arrangement between the normal cooling state and the backwashing state of the heat exchanger 20.
[0049] Continuing to refer to Figure 1 As shown in the figure, in some embodiments, the backwashing device 10 further comprises a liquid delivery power member 400 connected with the liquid supply pipeline 110. Specifically, the liquid delivery power member 400 can be a seawater pump such as a centrifugal pump, and the liquid delivery power member 400 provides power for the liquid, so as to deliver the heat exchange medium or the flushing liquid to the heat exchanger 20.
[0050] Optionally, in some embodiments, the backflushing device 10 further comprises a first valve 500 arranged on the second pipe 130 of the heat exchanger. In some embodiments, the backflushing device 10 further comprises a second valve 600 arranged on the first pipe 140 of the heat exchanger. For example, the first valve 500 and the second valve 600 can be manual butterfly valves, which are kept open in both the normal cooling state and the backflushing state to allow the liquid to pass normally. When the device fails or an abnormal situation occurs in the liquid delivery process, the first valve 500 and the second valve 600 can be closed to isolate the heat exchanger 20, thereby avoiding damage to the heat exchanger 20.
[0051] Referring to Figure 2 As shown in some embodiments such as the normal cooling state, the housing 210 has a valve cavity 211 inside, and the sidewall of the housing 210 is provided with a first channel 212, a second channel 213, a third channel 214 and a fourth channel 215. The first channel 212 and the second channel 213 are arranged on opposite sides of the housing 210, and the third channel 214 and the fourth channel 215 are arranged on the other two opposite sides of the housing 210. One end of the first channel 212 is in communication with the liquid supply pipe 110, and the other end of the first channel 212 is in communication with the first valve core channel 221. One end of the second channel 213 is in communication with the liquid discharge pipe 120, and the other end of the second channel 213 is in communication with the second valve core channel 222. One end of the third channel 214 is in communication with the second pipe 130 of the heat exchanger, and the other end of the third channel 214 is in communication with the first valve core channel 221. One end of the fourth channel 215 is in communication with the first pipe 140 of the heat exchanger, and the other end of the fourth channel 215 is in communication with the second valve core channel 222.
[0052] The inner core 220 is rotatably arranged in the valve cavity 211. In the normal cooling state, the two ends of the first valve core channel 221 of the inner core 220 are in communication with the first channel 212 and the third channel 214 respectively, and the two ends of the second valve core channel 222 are in communication with the second channel 213 and the fourth channel 215 respectively. In the backflushing state, the two ends of the first valve core channel 221 of the inner core 220 are in communication with the first channel 212 and the fourth channel 215 respectively, and the two ends of the second valve core channel 222 are in communication with the second channel 213 and the third channel 214 respectively. Thus, by controlling the rotation of the inner core 220 in the valve cavity 211, the normal cooling state and the backflushing state can be flexibly switched.
[0053] Further, in some embodiments, the valve cavity 211 and the inner core 220 are both spherical structures, and the first valve core passage 221 and the second valve core passage 222 are centrally symmetrically arranged inside the inner core 220. On the one hand, since the valve cavity 211 and the inner core 220 are both spherical structures, it is convenient to control the rotation of the inner core 220 in the valve cavity 211. On the other hand, when the inner core 220 is arranged in the valve cavity 211, the outer surface of the inner core 220 is tightly fitted with the surface of the sealing ring 240, so that the outer surface of the inner core 220 cannot leak liquid into the valve cavity 211, and the sealing performance is improved.
[0054] Optionally, the first valve core passage 221 and the second valve core passage 222 are both circular arc passages, that is, the center line of the first valve core passage 221 and the center line of the second valve core passage 222 are both arc lines. Referring to Figure 2 As shown in FIG. 5, the central angle α corresponding to the center line of the first valve core passage 221 is less than 90°, and the central angle corresponding to the center line of the second valve core passage 222 is also less than 90°, so that the resistance of the liquid flowing through the first valve core passage 221 and the second valve core passage 222 can be reduced, and the liquid can pass through quickly.
[0055] In some embodiments, the reversing assembly 200 further comprises a driving member 230, which is arranged through the side wall of the housing 210 and connected with the inner core 220. For example, referring to Figure 2 As shown in FIG. 6, the driving member 230 comprises a rotating shaft part 231 and a rotating disc part 232, the rotating shaft part 231 is arranged through the side wall of the housing 210, one end of the rotating shaft part 231 is connected with the inner core 220, and the other end of the rotating shaft part 231 is connected with the rotating disc part 232. The rotating disc part 232 is a circular structure, the center thereof is connected with the end of the rotating shaft part 231, and the rotating disc part 232 can conveniently transmit force to the rotating shaft part 231. Thus, the operator can rotate the rotating disc part 232 manually, thereby driving the rotating shaft part 231 to rotate, and further driving the inner core 220 to rotate, so as to realize stable switching between the normal cooling state and the backwashing state. For another example, referring to Figure 4 As shown in FIG. 7, the driving member 230 can be a motor, the output end of the motor is connected with the inner core 220, and the motor drives the inner core 220 to rotate, so as to improve the driving efficiency.
[0056] Continuing to refer to Figure 2As shown, in some embodiments, the reversing assembly 200 further comprises sealing rings 240, which are arranged between the housing 210 and the inner core 220. The sealing rings 240 can improve the sealing between the housing 210 and the inner core 220, so as to avoid the mixing of the inlet liquid and the outlet liquid due to the leakage, and thus reduce the flushing effect. For example, the reversing assembly 200 comprises four sealing rings 240, which are arranged at the side close to the inner core 220 of the first channel 212, the second channel 213, the third channel 214 and the fourth channel 215 respectively. In addition, the outer side of the sealing ring 240 is bonded to the housing 210, and the inner side of the sealing ring 240 is in close contact with the inner core 220. Thus, even if there is a gap between the housing 210 and the inner core 220 outside the sealing ring 240, the gap between the housing 210 and the inner core 220 can still be ensured not to leak into the interior of the valve cavity 211 through the sealing ring 240, while the movement of the inner core 220 relative to the housing 210 for switching the normal cooling state and the backwashing state is not affected.
[0057] Figure 1 and Figure 3 respectively show the schematic diagrams in the normal cooling state and the backwashing state in a specific embodiment. Referring to Figure 1 As shown, the schematic diagram in the normal cooling state is shown. Specifically, under the power provided by the liquid delivery power member 400, the seawater enters the reversing assembly 200 through the liquid supply pipeline 110, and then the seawater enters the heat exchanger 20 in sequence through the first channel 212, the first valve core channel 221, the third channel 214, the heat exchanger second pipeline 130 and the first valve 500, and then the seawater is discharged in sequence through the heat exchanger first pipeline 140, the second valve 600, the fourth channel 215, the second valve core channel 222, the second channel 213 and the liquid discharge pipeline 120, so as to realize the heat exchange function. Referring to Figure 3 As shown, the schematic diagram in the backwashing state is shown. Specifically, under the power provided by the liquid delivery power member 400, the seawater enters the reversing assembly 200 through the liquid supply pipeline 110, and then the seawater enters the heat exchanger 20 in sequence through the first channel 212, the first valve core channel 221, the fourth channel 215, the heat exchanger first pipeline 140 and the second valve 600, and then the seawater is discharged in sequence through the heat exchanger second pipeline 130, the first valve 500, the third channel 214, the second valve core channel 222, the second channel 213 and the liquid discharge pipeline 120, so as to realize the flushing function.
[0058] Thus, when the heat exchanger 20 is dirty and needs to be backwashed, the inner core 220 is driven to move by the driving member 230 to adjust the communication relationship between the first valve core passage 221 and the second valve core passage 222, so that the normal cooling state is switched to the backwashing state. And when the backwashing operation is completed, the inner core 220 is reset by the driving member 230, so that the backwashing state is switched to the normal cooling state.
[0059] Further, in some embodiments, when the driving member 230 is an electric motor, the backwashing device 10 further comprises a differential pressure sensor 300 connected with the heat exchanger second pipeline 130 and the heat exchanger first pipeline 140, and the differential pressure sensor 300 is electrically connected with the driving member 230. Referring to Figure 4 As shown, a DPT differential pressure sensor 300 is added between the bottom inlet and the top outlet of the heat exchanger 20, and the dirt condition of the heat exchanger 20 can be identified by the differential pressure signal. And when the dirt condition is monitored, the inner core 220 is driven to move by the driving member 230, so as to automatically switch to the backwashing state, realizing the function of automatic backwashing. When the dirt is washed clean, the differential pressure sensor 300 monitors that the differential pressure decreases to a certain value, and then the driving member 230 automatically controls the reversing assembly 200 to switch to the normal cooling state, realizing the function of automatically returning to the normal cooling state after backwashing.
[0060] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.
[0061] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.
Claims
1. A backwashing device, characterized in that, The backwashing device includes: A piping assembly, comprising a liquid supply line, a liquid discharge line, a second heat exchanger line, and a first heat exchanger line, wherein the second heat exchanger line and the first heat exchanger line are respectively configured to communicate with a heat exchanger; and A reversing assembly includes a housing and an inner core. The inner core rotates within the housing and is sealed to the housing. The inner core has a first valve core channel and a second valve core channel that are not interconnected. The inner core has a normal cooling state and a backflushing state. The inner core is configured to, in the normal cooling state, connect the liquid supply line and the second heat exchanger line through the first valve core channel and connect the liquid discharge line and the first heat exchanger line through the second valve core channel; and in the backflushing state, connect the liquid supply line and the first heat exchanger line through the first valve core channel and connect the liquid discharge line and the second heat exchanger line through the second valve core channel.
2. The backwashing device according to claim 1, characterized in that, The housing is provided with a first channel, a second channel, a third channel and a fourth channel. The first channel is connected to the liquid supply pipeline, the second channel is connected to the liquid discharge pipeline, the third channel is connected to the second pipeline of the heat exchanger, and the fourth channel is connected to the first pipeline of the heat exchanger. The inner core is configured to connect the first channel and the third channel through the first valve core channel in the normal cooling state, and to connect the second channel and the fourth channel through the second valve core channel, and to connect the first channel and the fourth channel through the first valve core channel in the backwashing state, and to connect the second channel and the third channel through the second valve core channel.
3. The backwashing device according to claim 2, characterized in that, The housing has a valve cavity, and both the valve cavity and the inner core are spherical structures; and / or Both the first valve core channel and the second valve core channel are arc-shaped channels, and the central angle corresponding to the center line of the first valve core channel and the central angle corresponding to the center line of the second valve core channel are both less than 90°.
4. The backwashing device according to claim 2, characterized in that, The commutation assembly further includes a drive element that passes through the side wall of the housing and is connected to the inner core; and / or The reversing assembly also includes a sealing ring disposed between the housing and the inner core, with the outer side of the sealing ring connected to the housing and the inner side of the sealing ring in contact with the inner core.
5. The backwashing device according to claim 4, characterized in that, The drive unit includes a rotating shaft and a turntable. The rotating shaft passes through the side wall of the housing. One end of the rotating shaft is connected to the inner core, and the other end of the rotating shaft is connected to the turntable.
6. The backwashing device according to claim 4, characterized in that, The backwashing device also includes a differential pressure sensor, which is connected to the second pipeline and the first pipeline of the heat exchanger, and is electrically connected to the drive unit.
7. The backwashing device according to claim 1, characterized in that, The backwashing device also includes a liquid delivery power unit, which is connected to the liquid supply pipeline.
8. The backwashing device according to claim 1, characterized in that, The backwashing device also includes a first valve, which is disposed on the second pipeline of the heat exchanger.
9. The backwashing device according to claim 1, characterized in that, The backwashing device also includes a second valve, which is disposed on the first pipeline of the heat exchanger.
10. A heat exchange system, characterized in that, The heat exchange system includes: A heat exchanger having an inlet and an outlet; and The backwashing device according to any one of claims 1-9, wherein the second heat exchanger pipeline and the first heat exchanger pipeline of the backwashing device are respectively connected to the outlet and the inlet.