Waste water waste heat recovery heat pump unit

Abstract

The invention discloses a waste water waste heat recovery heat pump unit, which relates to the technical field of waste heat recovery and comprises a bottom plate, a filtering tank mounted on the bottom plate, a heat pump body mounted on the bottom plate, a heat exchanger mounted on the bottom plate, a conveying pipe mounted on the filtering tank and an output rod mounted on the bottom plate, the discharging mechanism further comprises a pushing plate installed on the output rod, a collecting box installed on the filtering tank and a movable door installed on the collecting box, an inclined groove is formed in the movable door, the movable door is used for controlling whether waste is discharged or not, the pushing plate is used for pushing out the waste, and the pushing plate is used for pushing out the waste. When the second filter plate is blocked, the circulation ports can be switched, continuous and stable circulation of waste water can be maintained, cutoff and heat supply interruption are avoided, the heat pump body, the conveying pipe and the heat exchanger are protected against impact damage, the heat exchange flow is stabilized, and it is guaranteed that waste heat recovery runs stably without interruption.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery technology, specifically to a wastewater waste heat recovery heat pump unit. Background Technology

[0002] Agricultural production processes generate a large amount of wastewater carrying low-grade residual heat, including wastewater from livestock and poultry washing and manure treatment, wastewater from fruit and vegetable washing and processing, water and fertilizer circulation drainage from intelligent greenhouses, and tailwater from agricultural park sewage treatment plants. These wastewaters contain a large amount of recoverable residual heat. Direct discharge of these wastewaters not only wastes energy but also causes thermal pollution of water bodies and exacerbates the ecological burden. Utilizing heat pump units to recover the residual heat from these wastewaters and convert it into usable heat energy for agricultural production is the mainstream technological path to achieve agricultural energy recycling, cost reduction, and carbon reduction.

[0003] Patent publication number CN216953609U includes a heat pump body and a filter tank. The filter tank has an inner shell containing a filter assembly. A heat exchange box is located on the side of the filter tank near the heat pump body. A disc-shaped heat exchange tube is installed in the cavity between the inner wall of the filter tank and the outer wall of the inner shell. The water outlet of the disc-shaped heat exchange tube is connected to a serpentine heat exchange tube installed in the heat exchange chamber of the heat exchange box via a medium input pipe. The water outlet of the serpentine heat exchange tube is connected to the heat pump body via a water outlet component. A water distribution pipe is installed on the top of the heat exchange box. During wastewater filtration, the disc-shaped heat exchange tube absorbs part of the heat from the wastewater, and the wastewater preheats the heat transfer medium inside the disc-shaped heat exchange tube. After filtration, the wastewater is transported to the water distribution pipe via a water conveying component. The wastewater can enter the heat exchange chamber evenly through the water distribution pipe, enabling the heat transfer medium inside the serpentine heat exchange tube to effectively absorb the heat from the wastewater.

[0004] The aforementioned patent enables the heat transfer medium inside the serpentine heat exchange tube to effectively absorb heat from the wastewater. However, during heat exchange, a large amount of impurities in the wastewater will accumulate inside the device. Prolonged heat exchange can cause blockage at the filter, necessitating the filtration process to be stopped for maintenance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a wastewater waste heat recovery heat pump unit, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wastewater waste heat recovery heat pump unit, comprising a base plate, a filter tank mounted on the base plate, a heat pump body mounted on the base plate, a heat exchanger mounted on the base plate, a delivery pipe mounted on the filter tank, a motor mounted on the filter tank, and an output rod mounted on the base plate. The wastewater waste heat recovery heat pump unit also includes a discharge mechanism and a switching mechanism mounted on the delivery pipe. During wastewater treatment, the refrigerant inside the heat pump body extracts the main heat from the wastewater and transports it. Subsequently, the wastewater re-enters the heat exchanger through the delivery pipe, enabling deep recovery of residual heat from the wastewater, thereby further improving the overall efficiency of wastewater waste heat recovery.

[0007] The discharge mechanism includes an output rod installed at the output end of the motor and a filter plate installed on the base plate. The discharge mechanism is used to discharge waste. When the wastewater recycling is completed and the internal of the filter tank needs maintenance, the impurities pushed to the edge can enter the inside of the collection box, thereby separating the impurities in the wastewater and removing large impurities in the water. This effectively prevents impurities from clogging or wearing the heat exchanger, stabilizes the wastewater flow, slows down the scaling rate of the heat exchange surface, ensures the heat exchange efficiency and operational stability of the heat pump unit, reduces the frequency of downtime maintenance, meets the needs of continuous agricultural production and unattended operation, and extends the service life of the entire machine.

[0008] The switching structure includes a switching shell installed on the conveying pipe and a water-passing plate installed on the switching shell. The switching mechanism is used to ensure that the device can operate normally when blockage occurs. When recovering waste heat from wastewater, it performs secondary filtration on impurities such as sand and gravel in the wastewater, which greatly reduces the concentration of fine solid impurities entering the heat exchanger from the source, avoids fine sand from depositing and adhering on the heat exchanger wall to form a scale layer, maintains the cleanliness of the heat exchange wall and a high heat transfer coefficient, and ensures that the effective heat exchange area is not reduced, thereby significantly improving and stabilizing the waste heat recovery efficiency and overall heat exchange effect in the long term.

[0009] The discharge mechanism also includes a pusher plate mounted on the output rod, a collection box mounted on the filter tank, and a movable door mounted on the collection box. The movable door has an inclined groove inside. The movable door is used to control whether waste is discharged. The pusher plate is used to push out the waste. When the filter plate is blocked, the flow port can be switched to maintain continuous and stable wastewater flow, avoid system pressure buildup, flow interruption and heating interruption, protect the heat pump body, delivery pipe and heat exchanger from impact damage, stabilize the heat exchange flow rate, ensure stable operation of waste heat recovery and no reduction in heat exchange efficiency, realize online isolation maintenance of faulty flow channels, and improve the unit's anti-clogging ability and continuous operation reliability.

[0010] The switching mechanism also includes a support plate installed on the water passage plate, a sliding rod installed on the support plate, a pull plate installed on the sliding rod, and a second filter plate installed inside the water passage plate. The second filter plate is used to intercept and block fine sand impurities in the wastewater.

[0011] The filter plate is in contact with the push plate, and the output rod is in contact with the filter tank. The filter plate is used to perform the first interception and filtration of large impurities in agricultural wastewater.

[0012] The discharge mechanism also includes a sealing mechanism installed on the filter plate. The sealing mechanism includes a protrusion on the filter plate, a perforated plate on the output rod, an elastic rod on the perforated plate, and a protrusion on the elastic rod. The filter plate improves wastewater flow efficiency. When wastewater flow decreases, the protrusion contacts the filter plate and impacts it, dislodging impurities from the pores. This maintains unobstructed filtration channels, stable flow rate and velocity, and prevents blockage. Furthermore, during wastewater treatment, it prevents large impurities from accumulating on the surface of the filter plate, improving flow efficiency and promoting impurity movement towards the edges. When switching pipes, it avoids obstructing the movement of the water flow plate.

[0013] The sealing mechanism also includes a solenoid valve installed inside the delivery pipe, a connecting rod installed on the pull plate, a fixed rod installed on the collection box, a movable plate installed on the fixed rod, a sealing plate installed on the movable plate, a sealing ring installed on the movable plate, and a temperature sensor installed inside the filter tank. The sealing ring is used to improve the sealing performance and prevent water leakage. A spring is provided between the movable plate and the collection box, and a spring is provided between the second protrusion and the second hollow plate. The sealing plate can prevent the flowing wastewater from leaking out. After switching, it can improve the sealing effect, ensure the airtightness of the delivery pipe and the water plate, prevent heat loss in the hot water, improve heat exchange and heating efficiency, and at the same time avoid environmental pollution caused by liquid leakage. It can also block high-temperature wastewater from entering subsequent stages, prevent high-temperature wastewater from damaging the heat exchanger, and ensure that the unit operates within a safe temperature range.

[0014] The second protrusion is in contact with the first filter plate. During operation, the second protrusion moves through the first protrusion. The second spring is used to push the second protrusion to reset. The sealing ring is in contact with the inside of the conveying pipe.

[0015] The discharge mechanism also includes a compaction mechanism installed on the collection box. The compaction mechanism includes a rounded corner block installed on the collection box, an elastic rod II installed on the rounded corner block, and a trapezoidal block installed on the elastic rod II. A spring III is provided between the rounded corner block and the trapezoidal block. The trapezoidal block is used to limit the position of the movable door. When the sewage treatment is completed, the position of the movable door can be fixed to prevent the movable door from slipping, so as to provide a stable working space to improve the efficiency of sludge cleaning and maintenance, prevent the movable door from being frequently opened and closed in a short period of time, which would damage the sealing surface, and ensure the sealing and fitting accuracy after the movable door is closed.

[0016] The compaction mechanism also includes a rotating rod that rotates on the collection box via a torsion spring, a hinge plate mounted on the rotating rod, a rotating plate mounted on the hinge plate, and a pressure plate mounted on the rotating plate. The pressure plate is used to squeeze the impurities inside the collection box to improve space utilization. A force-bearing strip is installed on the rotating rod, and a push plate is installed on the movable door.

[0017] The force-bearing strip is in contact with the push plate, and the trapezoidal block is in contact with the movable door. As the movable door moves upward, it can squeeze the impurities and reduce their volume, thereby increasing the internal area of ​​the collection box, improving space utilization, extending the slag cleaning cycle, reducing the frequency of manual opening and slag cleaning, and meeting the needs of smart agricultural bases for long-term unattended operation and minimal human intervention.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, during wastewater treatment, the refrigerant inside the heat pump body extracts the main heat from the wastewater and transfers it. The wastewater then re-enters the heat exchanger through a delivery pipe, enabling deep recovery of residual heat and further improving the overall efficiency of wastewater heat recovery. When maintenance is required on the filter tank after wastewater recovery, impurities pushed to the edge enter the collection tank, separating impurities and removing large pieces. This effectively prevents blockage or wear on the heat exchanger, stabilizes wastewater flow, slows down scaling on the heat exchange surface, ensures the heat exchange efficiency and operational stability of the heat pump unit, reduces downtime for maintenance, and meets agricultural needs. To meet the needs of continuous production and unattended operation, and to extend the service life of the entire unit, the system performs secondary filtration of impurities such as sand and gravel in the wastewater during wastewater waste heat recovery. This significantly reduces the concentration of fine solid impurities entering the heat exchanger from the source, preventing fine sand from depositing and adhering to the heat exchanger wall to form a scale layer. This maintains the cleanliness of the heat exchange wall and a high heat transfer coefficient, ensuring that the effective heat exchange area is not reduced. As a result, the system significantly improves and stabilizes the waste heat recovery efficiency and overall heat exchange effect in the long term. At the same time, when the second filter plate becomes clogged, the flow port can be switched to maintain a continuous and stable flow of wastewater, avoiding flow interruption and heating interruption. This protects the heat pump body, delivery pipes, and heat exchanger from impact damage, stabilizes the heat exchange flow, ensures stable operation of waste heat recovery without interruption, and improves the unit's anti-clogging ability and continuous operation reliability.

[0019] 2. In this invention, when the wastewater flow rate decreases, the second protrusion contacts the first filter plate and exerts an impact force on it, thereby dislodging impurities from inside the pores of the first filter plate. This maintains unobstructed filtration channels, stable water flow rate and velocity, and prevents wastewater blockage. Simultaneously, during wastewater treatment, it prevents large impurities from accumulating on the surface of the first filter plate, improving water flow efficiency and promoting impurities to move towards the edges. When switching pipes, it avoids obstructing the movement of the water-passing plate, and the sealing plate prevents wastewater leakage. After switching, it improves the sealing effect, ensuring the airtightness of the delivery pipe and the water-passing plate, preventing heat loss from hot water, improving heat exchange and heating efficiency, preventing environmental pollution caused by liquid leakage, and blocking high-temperature wastewater from entering subsequent stages, preventing damage to the heat exchanger, and ensuring the unit operates within a safe temperature range.

[0020] 3. In this invention, the position of the movable door can be fixed when the sewage treatment is completed to prevent the movable door from sliding down, thereby providing a stable working space to improve the efficiency of sludge cleaning and maintenance, preventing damage to the sealing surface caused by frequent opening and closing of the movable door in a short period of time, ensuring the sealing and fitting accuracy after the movable door is closed, and squeezing the impurities during the upward movement of the movable door to reduce the volume of the impurities, thereby increasing the internal area of ​​the collection box, improving space utilization and extending the sludge cleaning cycle, reducing the frequency of manual opening and sludge cleaning, and adapting to the use needs of smart agricultural bases for long-term unattended operation and reduced human intervention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the position and structure of the filter tank and conveying pipe of the present invention; Figure 3 This is a schematic diagram of the output rod and filter plate at one position of the present invention; Figure 4 This is a schematic diagram showing the position and structure of the collection box and the movable door of the present invention; Figure 5 This is a schematic diagram of the position structure of the filter plate 2 and the sliding rod of the present invention; Figure 6 This is a schematic diagram showing the position and structure of the solenoid valve and sealing ring of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point A in the middle; Figure 8 For the present invention Figure 6 Enlarged view of the structure at point B in the middle; Figure 9 This is a schematic diagram of the two-position structure of the rounded corner block and the elastic rod of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of the structure at point C.

[0022] The meanings of the labels in the diagram are as follows: 1. Base plate; 2. Filter tank; 3. Heat pump body; 4. Heat exchanger; 5. Delivery pipe; 6. Motor; 7. Output rod; 8. Filter plate one; 9. Push plate; 10. Switching shell; 11. Collection box; 12. Movable door; 13. Sliding rod; 14. Pull plate; 15. Filter plate two; 16. Sealing mechanism; 161. Protrusion one; 162. Hollow plate two; 163. Elastic rod one; 164. Protrusion two; 165. Solenoid valve ; 166. Connecting rod; 167. Fixed rod; 168. Moving plate; 169. Sealing plate; 1610. Sealing ring; 1611. Temperature sensor; 17. Compaction mechanism; 171. Rounded corner block; 172. Elastic rod II; 173. Trapezoidal block; 174. Rotating rod; 175. Hinge plate; 176. Rotating plate; 177. Pressure plate; 178. Force-bearing strip; 179. Push plate; 18. Support plate; 19. Water-passing plate. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1: Please see Figures 1-5 One embodiment of the present invention is: a wastewater waste heat recovery heat pump unit, including a base plate 1, a filter tank 2 installed on the base plate 1, a heat pump body 3 installed on the base plate 1, a heat exchanger 4 installed on the base plate 1, a delivery pipe 5 installed on the filter tank 2, a motor 6 installed on the filter tank 2, and an output rod 7 installed on the base plate 1. The wastewater waste heat recovery heat pump unit also includes a discharge mechanism and a switching mechanism installed on the delivery pipe 5. The switching mechanism ensures stable operation of waste heat recovery and no reduction in heat exchange efficiency, and realizes online isolation and maintenance of faulty flow channels. The discharge mechanism includes an output rod 7 installed at the output end of the motor 6 and a filter plate 8 installed on the base plate 1. During the rotation of the push plate 9, impurities are pushed to the surrounding area. The discharge mechanism is used to discharge waste. The switching structure includes a switching shell 10 installed on the conveying pipe 5 and a water-passing plate 19 installed on the switching shell 10. The switching mechanism is used to ensure that the device can operate normally when blockage occurs, reduce the frequency of downtime maintenance, meet the needs of continuous agricultural production and unattended operation, and extend the service life of the whole machine.

[0025] The discharge mechanism also includes a push plate 9 mounted on the output rod 7, a collection box 11 mounted on the filter tank 2, and a movable door 12 mounted on the collection box 11. The movable door 12 has an inclined groove inside. The movable door 12 is used to control whether the waste is discharged and can prevent wastewater from flowing out. The push plate 9 is used to push the waste out.

[0026] In this embodiment, during wastewater treatment, the wastewater first enters the filter tank 2, where the filter plate 8 performs preliminary filtration of impurities. The wastewater then flows through the delivery pipe 5 into the heat pump body 3, where the refrigerant extracts the main heat from the wastewater and transfers it. The wastewater then flows back through the delivery pipe 5 into the heat exchanger 4, enabling deep recovery of residual heat and further improving the overall efficiency of wastewater heat recovery. When maintenance is required on the filter tank 2 after wastewater recovery, the motor 6 starts, driving the output rod 7 to rotate. The rotation of the output rod 7 drives the pusher plate 9 to rotate, which in turn interacts with the filter tank 2. The filter plate 8 comes into contact with the impurities accumulated on the surface of the filter plate 8 during the rotation of the pusher plate 9. Then, under the synchronous action of the inclined surface of the filter plate 8 and centrifugal force, the impurities are pushed to the periphery. Then, the operator pulls the movable door 12 upward, so that the impurities pushed to the edge can enter the interior of the collection box 11. This can collect the impurities and separate the impurities in the wastewater, and remove large impurities in the water. This can effectively prevent impurities from clogging or wearing the heat exchanger 4, stabilize the water flow of the wastewater, slow down the scaling rate of the heat exchange surface, ensure the heat exchange efficiency and operational stability of the heat pump unit, reduce the frequency of downtime maintenance, meet the needs of continuous agricultural production and unattended operation, and extend the service life of the whole machine.

[0027] The switching mechanism also includes a support plate 18 installed on the water flow plate 19, a sliding rod 13 installed on the support plate 18, a pull plate 14 installed on the sliding rod 13, and a filter plate 15 installed inside the water flow plate 19. The filter plate 15 is used to intercept and block fine sand impurities in the wastewater and to perform secondary filtration on sand and gravel impurities in the wastewater, thereby improving and stabilizing the waste heat recovery efficiency and overall heat exchange effect in the long term.

[0028] The filter plate 8 is in contact with the push plate 9, and the output rod 7 is in contact with the filter tank 2. The filter plate 8 is used to intercept and filter large impurities in agricultural wastewater for the first time.

[0029] During wastewater heat recovery, the wastewater enters the interior of the water-passing plate 19 through the conveying pipe 5. There, it passes through the filter plate 15, where it undergoes secondary filtration of sand and other impurities. This significantly reduces the concentration of fine solid impurities entering the heat exchanger 4 at the source, preventing fine sand from depositing and forming scale on the heat exchanger 4 wall. This maintains a clean heat exchange wall and a high heat transfer coefficient, ensuring the effective heat exchange area is not reduced. Consequently, it significantly improves and stabilizes the waste heat recovery efficiency and overall heat exchange effect over the long term. Simultaneously, when the filter plate 15 becomes clogged, the operator pulls the pull plate 14 backward. The movement of the pull plate 14 will cause the sliding rod 13 to move. During the movement of the sliding rod 13, it will contact the support plate 18 and then move the support plate 18 synchronously. The movement of the support plate 18 will cause the water flow plate 19 to move, thereby switching the flow port, maintaining continuous and stable wastewater flow, avoiding system pressure buildup, flow interruption and heating interruption, protecting the heat pump body 3, the delivery pipe 5 and the heat exchanger 4 from impact damage, stabilizing the heat exchange flow, ensuring stable operation of waste heat recovery and no reduction in heat exchange efficiency, realizing online isolation maintenance of faulty flow channels, and improving the unit's anti-clogging ability and continuous operation reliability.

[0030] Example 2: Please see Figures 5-8 Based on the above embodiments, in another embodiment of the present invention, the discharge mechanism further includes a sealing mechanism 16 installed on the filter plate 8. The sealing mechanism 16 includes a protrusion 161 installed on the filter plate 8, a perforated plate 162 installed on the output rod 7, an elastic rod 163 installed on the perforated plate 162, and a protrusion 164 installed on the elastic rod 163. The protrusion 164 will contact the filter plate 8 and generate an impact force on the filter plate 8. The filter plate 8 is used to improve the flow efficiency of wastewater, thereby keeping the filter channel unobstructed, the flow rate and velocity stable, and preventing wastewater from being blocked and difficult to flow.

[0031] In this embodiment, during operation: when the wastewater flow rate decreases, the output rod 7 rotates, causing the second perforated plate 162 to rotate. The rotation of the second perforated plate 162 causes the first elastic rod 163 to rotate, which in turn causes the second protrusion 164 to rotate. During this process, the second protrusion 164 contacts the first protrusion 161. Subsequently, the second protrusion 164 moves downwards through the arc-shaped surface of the first protrusion 161. The downward movement of the first protrusion 161 causes the first elastic rod 163 to move downwards. The downward movement of the first elastic rod 163 compresses the spring on its surface. Then, the second protrusion 164... 4. Continue rotating. When protrusion 2 164 passes protrusion 1 161, elastic rod 1 163 will drive protrusion 2 164 upward through the spring to reset. Then, protrusion 2 164 will contact filter plate 1 8 and generate an impact force on filter plate 1 8, which can shake off the impurities inside the holes of filter plate 1 8, thereby keeping the filter channel unobstructed, the water flow rate and velocity stable, and preventing wastewater from being blocked and difficult to flow. At the same time, during the wastewater treatment process, it can also prevent large impurities from covering the surface of filter plate 1 8, improve the water flow efficiency, and promote the flow of impurities to the edge.

[0032] The sealing mechanism 16 also includes a solenoid valve 165 installed inside the delivery pipe 5, a connecting rod 166 installed on the pull plate 14, a fixing rod 167 installed on the collection box 11, a moving plate 168 installed on the fixing rod 167, a sealing plate 169 installed on the moving plate 168, a sealing ring 1610 installed on the moving plate 168, and a temperature sensor 1611 installed inside the filter tank 2. The temperature sensor 1611 is used to detect the temperature of the wastewater inside the filter tank 2. The sealing ring 1610 is used to improve the sealing performance and prevent water leakage. A spring is provided between the moving plate 168 and the collection box 11, and a spring is provided between the protrusion 164 and the hollow plate 162. The sealing plate 169 can prevent the flowing wastewater from leaking out.

[0033] The second protrusion 164 is in contact with the first filter plate 8. During operation, the second protrusion 164 will move through the first protrusion 161. The second spring is used to push the second protrusion 164 to reset. The sealing ring 1610 is in contact with the inside of the conveying pipe 5. The sealing ring 1610 can be completely retracted into the inside of the water passage plate 19.

[0034] During pipe switching, the movement of the pull plate 14 synchronously pulls the connecting rod 166, which in turn pulls the moving plate 168. The movement of the moving plate 168 stretches the spring sleeved on the surface of the fixed rod 167, causing the sealing plate 169 to move. This movement, in turn, causes the sealing ring 1610 to move synchronously, allowing it to fully retract into the water flow plate 19. This prevents obstruction of the water flow plate 19's movement and prevents wastewater leakage. After switching, the moving plate 168 is reset by the spring on the surface of the fixed rod 167, at which point the sealing ring 1610 is positioned within the water flow plate 19. The connection between the conveying pipe 5 and the push plate 19 is blocked, thereby improving the sealing effect, ensuring the airtightness of the conveying pipe 5 and the water plate 19, preventing heat loss from the hot water, improving heat exchange and heating efficiency, and avoiding environmental pollution caused by liquid leakage. When the temperature sensor 1611 detects that the wastewater temperature is too high and the temperature difference with the previously flowing wastewater is too large, it will activate the solenoid valve 165 through an electrical signal to close the outlet. It can also work with the push plate 9 to stir and dissipate heat from the wastewater. After the temperature drops to the standard range, the outlet will be opened again, thereby preventing high-temperature wastewater from entering the subsequent stages, preventing high-temperature wastewater from damaging the heat exchanger 4, and ensuring that the unit operates within a safe temperature range.

[0035] Example 3: Please see Figures 9-10 Based on the above embodiments, in another embodiment of the present invention, the discharge mechanism further includes a compaction mechanism 17 installed on the collection box 11. The compaction mechanism 17 includes a rounded corner block 171 installed on the collection box 11, an elastic rod 172 installed on the rounded corner block 171, and a trapezoidal block 173 installed on the elastic rod 172. A spring is provided between the rounded corner block 171 and the trapezoidal block 173. When the movable door 12 moves upward to the top, the inclined groove inside the movable door 12 will be parallel to the trapezoidal block 173. At this time, the elastic rod 172 will drive the trapezoidal block 173 to move to the right through the surface-compressed spring. The trapezoidal block 173 is used to limit the movable door 12.

[0036] The compaction mechanism 17 also includes a rotating rod 174 that rotates on the collection box 11 via a torsion spring, a hinge plate 175 mounted on the rotating rod 174, a rotating plate 176 mounted on the hinge plate 175, and a pressure plate 177 mounted on the rotating plate 176. The pressure plate 177 is used to squeeze the impurities inside the collection box 11 to improve space utilization. A force-bearing bar 178 is installed on the rotating rod 174, and a push plate 179 is installed on the movable door 12. When the push plate 179 moves upward, it will push the force-bearing bar 178 to rotate. The force-bearing bar 178 and the push plate 179 are in contact with each other, and the trapezoidal block 173 is in contact with the movable door 12. The movement of the pressure plate 177 can increase the internal area of ​​the collection box 11, improve space utilization, extend the slag cleaning cycle, and reduce the frequency of manual opening and slag cleaning.

[0037] In this embodiment, during operation: when wastewater treatment is complete, as the movable door 12 moves upward to the top, the inclined groove inside the movable door 12 becomes parallel to the trapezoidal block 173. At this time, the elastic rod 172, through the surface-compressed spring, drives the trapezoidal block 173 to move to the right. During the rightward movement, the trapezoidal block 173 contacts the groove inside the movable door 12 and gets stuck on the inner wall of the trapezoidal block 173, thereby fixing the position of the movable door 12 and preventing it from slipping. This provides a stable working space to improve the efficiency of sludge removal and maintenance, prevents damage to the sealing surface caused by frequent opening and closing of the movable door 12 in a short period of time, and ensures the sealing accuracy of the movable door 12 after it is closed. During the upward movement of the movable door 12, the upward movement of the movable door 12 will drive the push plate 179 upward. When the push plate 179 moves upward, it pushes the force bar 178 to rotate. The rotation of the force bar 178 drives the rotating rod 174 to rotate. The rotation of the rotating rod 174 drives the hinge plate 175 to rotate. The rotation of the hinge plate 175 drives the rotating plate 176 and the pressure plate 177 to move upward synchronously. When the movable door 12 moves downward, the rotating rod 174 will rotate in the opposite direction through the torsion spring, which will then cause the pressure plate 177 to move downward. The downward movement of the pressure plate 177 will squeeze the impurities inside the collection box 11, thereby squeezing the impurities, reducing their volume, increasing the internal area of ​​the collection box 11, improving space utilization, extending the slag cleaning cycle, and reducing the frequency of manual opening and slag cleaning. This is suitable for the long-term unattended operation and reduced human intervention requirements of smart agricultural bases.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater waste heat recovery heat pump unit, comprising a base plate (1), a filter tank (2) mounted on the base plate (1), a heat pump body (3) mounted on the base plate (1), a heat exchanger (4) mounted on the base plate (1), a delivery pipe (5) mounted on the filter tank (2), a motor (6) mounted on the filter tank (2), and an output rod (7) mounted on the base plate (1), characterized in that, The wastewater waste heat recovery heat pump unit also includes a discharge mechanism and a switching mechanism installed on the delivery pipe (5): The discharge mechanism includes an output rod (7) installed at the output end of the motor (6) and a filter plate (8) installed on the base plate (1). The discharge mechanism is used to discharge waste materials. The switching structure includes a switching shell (10) installed on the delivery pipe (5) and a water-passing plate (19) installed on the switching shell (10). The switching mechanism is used to ensure that the device can operate normally when a blockage occurs.

2. The wastewater waste heat recovery heat pump unit according to claim 1, characterized in that: The discharge mechanism also includes a push plate (9) installed on the output rod (7), a collection box (11) installed on the filter tank (2), and a movable door (12) installed on the collection box (11). The movable door (12) has an inclined groove inside. The movable door (12) is used to control whether the waste is discharged, and the push plate (9) is used to push out the waste. The switching mechanism also includes a support plate (18) installed on the water-passing plate (19), a sliding rod (13) installed on the support plate (18), a pull plate (14) installed on the sliding rod (13), and a filter plate two (15) installed inside the water-passing plate (19), the filter plate two (15) being used to intercept and block fine sand impurities in the wastewater.

3. The wastewater waste heat recovery heat pump unit according to claim 2, characterized in that: The filter plate (8) is in contact with the push plate (9), and the output rod (7) is in contact with the filter tank (2). The filter plate (8) is used to intercept and filter large impurities in agricultural wastewater for the first time.

4. The wastewater waste heat recovery heat pump unit according to claim 2, characterized in that: The discharge mechanism also includes a sealing mechanism (16) installed on the filter plate (8). The sealing mechanism (16) includes a protrusion (161) installed on the filter plate (8), a perforated plate (162) installed on the output rod (7), an elastic rod (163) installed on the perforated plate (162), and a protrusion (164) installed on the elastic rod (163). The filter plate (8) is used to improve the flow efficiency of wastewater.

5. The wastewater waste heat recovery heat pump unit according to claim 4, characterized in that: The sealing mechanism (16) also includes a solenoid valve (165) installed inside the conveying pipe (5), a connecting rod (166) installed on the pull plate (14), a fixing rod (167) installed on the collection box (11), a moving plate (168) installed on the fixing rod (167), a sealing plate (169) installed on the moving plate (168), a sealing ring (1610) installed on the moving plate (168), and a temperature sensor (1611) installed inside the filter tank (2). The sealing ring (1610) is used to improve the sealing performance and prevent water leakage. A spring is provided between the moving plate (168) and the collection box (11), and a spring is provided between the second protrusion (164) and the second hollow plate (162).

6. The wastewater waste heat recovery heat pump unit according to claim 5, characterized in that: The second protrusion (164) is in contact with the first filter plate (8). During operation, the second protrusion (164) moves through the first protrusion (161). The second spring is used to push the second protrusion (164) to reset. The sealing ring (1610) is in contact with the inside of the conveying pipe (5).

7. The wastewater waste heat recovery heat pump unit according to claim 2, characterized in that: The discharge mechanism also includes a compaction mechanism (17) installed on the collection box (11). The compaction mechanism (17) includes a rounded corner block (171) installed on the collection box (11), an elastic rod (172) installed on the rounded corner block (171), and a trapezoidal block (173) installed on the elastic rod (172). A spring is provided between the rounded corner block (171) and the trapezoidal block (173). The trapezoidal block (173) is used to limit the movement of the movable door (12).

8. The wastewater waste heat recovery heat pump unit according to claim 7, characterized in that: The compaction mechanism (17) further includes a rotating rod (174) that rotates on the collection box (11) via a torsion spring, a hinge plate (175) mounted on the rotating rod (174), a rotating plate (176) mounted on the hinge plate (175), and a pressure plate (177) mounted on the rotating plate (176). The pressure plate (177) is used to squeeze the impurities inside the collection box (11) to improve space utilization. A force-bearing strip (178) is installed on the rotating rod (174), and a push plate (179) is installed on the movable door (12). The force-bearing strip (178) is in contact with the push plate (179), and the trapezoidal block (173) is in contact with the movable door (12).

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