Ultralow-temperature air source full-direct-current variable-frequency heat pump

Abstract

The invention relates to the technical field of heat pumps, in particular to an ultralow-temperature air source full-direct-current variable-frequency heat pump which comprises a heat pump fan, the heat pump fan further comprises a machine box, an impeller, a driving motor, heat exchange pieces and a liquid guide pipe, an air inlet is formed in the machine box, an air inlet grille is arranged at the position of an end opening of the air inlet, an air outlet is further formed in the machine box, and the air inlet grille is arranged at the position of an end opening of the air inlet. An air outlet grid is arranged at the air outlet, a filter screen is arranged in the air inlet, a wetting assembly used for wetting the filter screen is further arranged in the air inlet, the wetting assembly comprises an atomizing nozzle arranged in the air inlet, the atomizing nozzle faces the filter screen, a water tank is arranged outside the air inlet, and a water outlet is formed in the water tank. And the water tank is communicated with the atomizing nozzle. According to the computer case, the atomizing nozzle is arranged at the air inlet to humidify the filter screen, the dust blocking effect of the filter screen is further improved through the wet filter screen, and it is avoided that dust enters the case to affect the air heat exchange efficiency of the heat exchange pieces.

Description

Technical Field

[0001] The invention relates to the technical field of heat pumps, and in particular to an ultra-low temperature air source full DC variable frequency heat pump. Background Art

[0002] Heat pump is a highly efficient energy-saving device that fully utilizes low-grade thermal energy. The working principle of heat pump is a mechanical device that forces heat to flow from low-temperature objects to high-temperature objects in a reverse cycle. It consumes only a small amount of reverse cycle net work to obtain a large amount of heat supply, and can effectively utilize low-grade thermal energy that is difficult to use to achieve energy saving.

[0003] The air source heat pump system in the prior art needs to use an impeller to guide the air into the chassis of the heat pump fan, and a grille is usually set at the air inlet of the chassis to prevent debris from entering the chassis. However, the mesh of the grille is relatively large, and it can usually only prevent larger debris such as leaves or plastic bags from entering the chassis. In dry weather areas such as the northwest, it is often windy. Although the grille prevents leaves, plastic bags or paper from entering the chassis, dust, pebbles and the like may enter the chassis through the grille when the impeller sucks air into the chassis. After entering the chassis, the dust will adhere to the heat exchange plate or the liquid guide tube. After the dust adheres to the liquid guide tube or the heat exchange plate, it will affect the efficiency of the heat exchange plate absorbing the air heat and transferring it to the liquid guide tube, affecting the heating efficiency of the liquid inside the liquid guide tube, and thus affecting the efficiency of the entire heat pump. When small stones pass through the grille and enter the air inlet, they may hit the impeller blades and cause damage to the impeller. When small stones enter the inside of the chassis, they will also hit the heat exchanger and the liquid duct, which may easily cause damage to the heat exchanger or the liquid duct in the long run. If small stones are stuck between the heat exchanger plates, it will also affect the efficiency of the heat exchanger plates in absorbing heat from the air.

[0004] In order to solve the problem that the dust easily enters the inside of the chassis, the Chinese utility model patent with application number CN202121173430.5 and titled "An Ultra-low Temperature Full DC Variable Frequency Air Source Heat Pump" proposes a solution, which includes a heat pump fan, a rotating rain shield is provided on both sides of the heat pump fan, and two adjustment sliders are movably installed on the bottom surface of the rotating rain shield, and a double-headed screw rod is provided in the middle of the two adjustment sliders, and an adjustment side plate is fixedly installed on the bottom surface of the adjustment slider, and the heat pump fan is provided with a replacement air port on both sides of the surface, and the heat pump fan is provided with two dustproof nets, and the outside of the dustproof net is movably installed with a lifting rod, and a cleaning scraper is provided between the lifting rod and the dustproof net, and the lifting sliders are fixedly installed at both ends of the lifting rod. The patent can intercept pollutants such as dust or leaves from the outside by setting dustproof nets, lifting rods, cleaning scrapers, lifting sliders and lifting screws, so as to prevent pollutants from entering the heat pump and causing damage to the inside of the pump, and facilitate cleaning.

[0005] Although the above patent blocks dust through filters, during implementation, maintenance personnel found that in the northwest region, when the weather is dry and the air humidity is lower than 30%, even if filters are added, a lot of dust still passes through the filters and enters the chassis of the heat pump fan. The effect of filtering dust with filters alone is not obvious enough, and the filtering effect still needs to be improved.

[0006] Therefore, an ultra-low temperature air source full DC variable frequency heat pump is proposed. Summary of the invention

[0007] The purpose of the present invention is to provide an ultra-low temperature air source full DC variable frequency heat pump, which can improve the dust filtering effect of the filter and ensure the heat exchange efficiency with the air during the use of the heat pump.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A super-low temperature air source full DC variable frequency heat pump comprises a heat pump fan, which further comprises a chassis, an impeller, a driving motor, a heat exchange plate, and a liquid guide pipe. The chassis is provided with an air inlet, an air inlet grille is provided at the air inlet port, the impeller is arranged in the air inlet for sucking air into the chassis, the driving motor is used to drive the impeller to rotate, the liquid guide pipe is fixedly installed in the chassis, there are multiple heat exchange plates, and the multiple heat exchange plates are evenly fixedly installed on the liquid guide pipe, the chassis is also provided with an air outlet, an air outlet grille is provided at the air outlet, a filter is provided inside the air inlet, a wetting component for wetting the filter is also provided inside the air inlet, the wetting component comprises an atomizing nozzle arranged inside the air inlet, the atomizing nozzle is facing the direction of the filter, a water tank is arranged outside the air inlet, and the water tank is connected to the atomizing nozzle.

[0010] A filter is set inside the air inlet to block dust in the air, preventing dust in the air from entering the chassis when the impeller sucks air into the chassis, preventing dust from adhering to the liquid guide tube or heat exchange plate after entering the chassis, and preventing dust from affecting the heat exchange efficiency of the heat guide tube or heat exchange plate for air. At the same time, an atomizing nozzle is set inside the air inlet, which atomizes the water inside the water tank and sprays it toward the filter. After the filter is moistened, the dust in the air can be better adsorbed on the filter when passing through the filter, further improving the filtering effect of the filter on dust in the air, and further ensuring that dust will not enter the chassis and affect the heat exchange effect of the heat pump fan. In addition, the atomizing nozzle can also moisten the dust in the air when spraying atomized water, so that the dust in the air becomes heavier and falls downward, and it can also prevent dust from entering the chassis. The grille is used to block larger debris such as leaves, plastic bags, etc. It can also prevent larger debris from entering the air inlet and colliding with and damaging the filter, thus protecting the filter.

[0011] Preferably, the filter is a circular filter, a connecting rod is provided at the center of the end face of the impeller, and the filter is mounted on the connecting rod and rotates with the impeller. Since the atomizing nozzle is fixed inside the air inlet, the atomizing nozzle may humidify the filter unevenly, and the filter rotates with the impeller to make the humidification of the filter more uniform, thereby ensuring that the filter can absorb and intercept dust in the air, and ensuring the stability of the effect of the filter during use.

[0012] Preferably, an annular ventilation gap is arranged between the outer edge of the filter and the inner wall of the air inlet; the wetting component also includes two slide grooves fixedly installed at the outer edge of the filter, the circumferences of the two slide grooves are evenly distributed at the outer edge of the filter, centrifugal blocks are slidably installed inside the slide grooves, a first spring is arranged between the centrifugal block and the bottom of the slide groove, one end of the first spring is fixedly connected to the centrifugal block, and the other end is fixedly connected to the bottom of the slide groove, and the first spring is used to keep the centrifugal block received inside the slide groove; a trigger button is arranged on the inner wall of the air inlet, the trigger button is used to control the start of the atomizing nozzle, the trigger button is a momentary button, and the trigger button and the filter are located in the same plane. When the impeller rotates, it will drive the filter to rotate together. When the filter rotates, the centrifugal block will be thrown away from the center of the filter due to the centrifugal force. Finally, the end of the centrifugal block away from the center of the filter will move in a circle along the inner wall of the air inlet. When the centrifugal block passes the trigger button, the trigger button will be pressed. At this time, the atomizing nozzle will spray water mist to moisten the filter. When the centrifugal block passes the trigger button, the centrifugal block no longer presses the trigger button. After the trigger button is reset, the atomizing nozzle stops spraying water mist.

[0013] The atomizing nozzle can automatically control the start and stop frequency of the atomizing nozzle according to the rotation speed of the impeller. When the impeller speed is low, the air suction rate into the chassis is low, the amount of air sucked in is small, and the dust entering the chassis with the air is also small. Therefore, reducing the start frequency of the atomizing nozzle can not only ensure that the filter is in a wet state, but also reduce the unnecessary waste of heavy water in the water tank; when the impeller speed is high, the air suction rate into the chassis is high, the amount of air sucked in is large, and the dust entering the chassis with the air is also large. The frequency of the atomizing nozzle spraying water mist can also increase with the speed of the impeller, ensuring the continuous wetting of the filter, so as to ensure that the dust can adhere to the filter and will not enter the inside of the chassis. By installing a centrifugal block on the filter with a trigger button, the frequency of the atomizing nozzle spraying water mist automatically adapts to the speed of the impeller, which improves the degree of adaptability of the equipment to the working conditions.

[0014] Two blocking rings are arranged inside the air inlet, and the two blocking rings are respectively located in front of and behind the filter screen. The distance between the two blocking rings and the mesh surface of the filter screen is 1-2 cm. The two blocking rings are fixedly installed on the air inlet, and the width of the blocking ring is the same as the width of the ventilation gap. A U-shaped opening is formed between the two blocking rings and the filter screen. The blocking ring is used to block the gap between the filter screen and the inner wall of the air inlet to prevent the air flow from directly entering the chassis from the gap between the filter screen and the inner wall of the air inlet. By allowing a certain distance between the two blocking rings and the filter screen, and allowing the filter screen and the two blocking rings to form a U-shaped opening, part of the air can be allowed to bypass the filter screen from the U-shaped opening to enter the chassis when the impeller is running at high power, which helps to ensure the air intake of the heat pump fan. When the air passes through the U-shaped opening, it needs to bypass the filter screen and will be blocked and decelerated by the blocking ring. After deceleration, the dust in the air will be collided with the blocking ring and remain in the U-shaped opening between the two blocking rings. Therefore, the U-shaped opening design not only ensures the air intake of the heat pump fan, but also reduces the dust entering the chassis.

[0015] It should be noted that the area of ​​the filter should be larger than the air inlet area of ​​the U-shaped opening, that is, the U-shaped opening only serves as an auxiliary means for airflow to enter the interior of the chassis.

[0016] Preferably, the air intake grille is slidably mounted on the air intake port, a fixing ring is arranged on the end surface of the air intake port, a plurality of second springs are arranged on the air intake port, and the plurality of second springs are evenly distributed in the air intake port, one end of the second spring is fixedly connected to the fixing ring, and the other end is fixedly connected to the air intake grille, and the second spring is used to keep the air intake grille pushed toward the filter screen; a vibration rod is fixedly mounted on the side of the air intake grille facing the filter screen, and the vibration rod extends toward the filter screen along the axis direction of the connecting rod, and a collision ball is arranged at one end of the centrifugal block close to the opening of the chute, and the collision ball is located outside the chute, and the diameter of the collision ball is greater than the width of the centrifugal block. The vibration rod does not intersect with the plane where the centrifugal block is located, that is, the centrifugal block will never contact the vibration rod in the process of following the rotation of the filter screen; the vibration rod is located on the circular trajectory of the collision ball rotating around the connecting rod when the first spring is in the natural state, and the projection of the vibration rod in the axis direction of the connecting rod intersects with the projection of the collision ball in the axis direction of the connecting rod. When the filter rotates at a low speed, the centrifugal force on the centrifugal block is small. When the centrifugal block passes the vibration rod, the collision ball on the centrifugal block will collide with the vibration rod. After the collision ball collides with the vibration rod, the collision ball will push the vibration rod toward the air intake grille. The second spring is compressed, and after the vibration rod avoids the collision ball, the collision ball can pass the vibration rod and continue to rotate without interference. When the vibration rod collides with the collision ball, it helps to vibrate the filter and the air intake grille, which helps to vibrate the debris on the air intake grille to avoid debris clogging the air intake grille. At the same time, the dust on the filter can be shaken off after the filter vibrates, which prevents the dust from agglomerating on the filter and affecting the ventilation effect of the filter, and also helps to reduce the load of the drive motor.

[0017] When the impeller speed increases, the centrifugal block moves away from the center of the filter under the action of centrifugal force, and the collision ball no longer collides with the vibration rod during rotation, avoiding the collision of the collision ball with the vibration rod during high-speed rotation, resulting in damage to the vibration rod or the collision ball. It should be noted that the collision ball is set to collide with the vibration rod at a low speed to clean the filter and the air intake grille. Another purpose is that when the filter rotates at a low speed, the impeller also rotates at a low speed, and the impeller sucks air into the chassis with less suction. At this time, the dust caked on the filter can be shaken off by vibration, which can also ensure that the shaken dust will not be sucked into the chassis.

[0018] In this way, after setting up the collision ball and the vibration rod, the filter and the air intake grille will be automatically vibrated and cleaned every time the impeller starts and stops, preventing dust from clogging the filter and preventing leaves or debris from clogging the air intake grille, thereby ensuring the stability of the equipment's air intake.

[0019] Preferably, a scraper is vertically fixedly installed in the air inlet, the scraper is located between two blocking rings, the scraper is in contact with the side of the filter screen facing the air inlet grille, one end of the scraper is fixedly connected to the air inlet, and the other end is located at the center of the filter screen. A collecting groove is provided outside the air inlet, the collecting groove is located directly below the scraper, and a collecting hole is opened on the side wall of the air inlet on the lower side of the scraper, and the collecting hole is connected to the collecting groove.

[0020] The scraper is attached to the filter. When the filter rotates and passes through the scraper, the scraper can scrape off the dust adsorbed on the surface of the filter by the wet filter, further ensuring the cleanliness of the filter and preventing dust from clogging the filter and affecting the air intake of the heat pump fan. The dust scraped off the filter will fall into the collection hole and enter the collection tank from the collection hole, preventing dust from accumulating in the air inlet.

[0021] Preferably, the filter is slidably mounted on a connecting rod, a limiting block is provided on the connecting rod, a limiting groove matching the limiting block is provided on the filter, the limiting block is inserted into the limiting groove to prevent relative rotation between the filter and the connecting rod, and a third spring is provided on the connecting rod, and the third spring is used to keep the filter pushed toward the air intake grille.

[0022] The filter can slide along the axis of the connecting rod, so that when the collision ball contacts and collides with the vibration rod, the filter can move away from the air intake grille to avoid it. The third spring is used to reset the filter. Since the movable range is larger, it can further prevent the filter, the vibration rod or the collision ball from being damaged due to collision, thereby improving the stability of the equipment during use and ensuring the service life of the equipment. In addition, after the filter is movable, the vibration amplitude of the filter is also increased during the collision between the collision ball and the vibration rod, which helps to further shake off the dust on the filter.

[0023] Preferably, a baffle is provided in the collection hole, and the baffle is tilted downward toward the collection tank. The downwardly tilted baffle can block the dust inside the collection tank from moving upward, preventing the airflow disturbed by the impeller from being sucked out of the collection tank, and can also guide the dust scraped from the filter by the scraper downward, allowing the dust to slide along the baffle into the collection tank.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. Compared with the existing heat pumps, the ultra-low temperature air source full DC variable frequency heat pump designed by the present invention has a filter screen at the air inlet of the heat pump fan. When the heat pump fan draws air into the chassis, the filter screen will block the dust in the air, reducing the dust from entering the chassis with the air to affect the use efficiency of the heat exchange plate, and an atomizing nozzle is provided at the air inlet to humidify the filter screen. The wet filter screen further improves the dust blocking effect of the filter screen, avoiding dust from entering the chassis and affecting the heat exchange efficiency of the heat exchange plate, thereby ensuring the use effect of the heat pump.

[0026] 2. In an ultra-low temperature air source full DC variable frequency heat pump designed by the present invention, the filter rotates with the impeller to ensure that the atomizing nozzle can evenly moisten the filter. A centrifugal block and a trigger button are also provided. The centrifugal force when the filter rotates is used to allow the centrifugal block to press the trigger button. The water spraying cycle of the atomizing nozzle is automatically regulated by the rotation speed of the impeller. The water spraying cycle of the atomizing nozzle is related to the rate at which the impeller sucks air toward the inside of the chassis. This can not only save water inside the water tank, but also ensure that the filter can remain sufficiently moist, thereby improving the adaptability of the heat pump equipment to operating conditions.

[0027] 3. An ultra-low temperature air source full DC variable frequency heat pump designed by the present invention is also provided with a collision ball. The collision ball uses the centrifugal force of the filter screen to cooperate with the vibration rod, so that the collision ball can hit the vibration rod when the filter screen rotates at a low speed, so that dust or debris on the filter screen and the air intake grille fall off, ensuring that the filter screen and the air intake grille will not be blocked. When the filter screen rotates at a high speed, the centrifugal force causes the collision ball and the vibration rod to be misaligned and unable to collide, ensuring that the collision ball and the vibration rod will not be damaged by collision when the filter screen rotates at a high speed, thereby ensuring the service life of the heat pump equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front perspective structural schematic diagram of the present invention;

[0029] Figure 2 It is a rear-view stereoscopic structural schematic diagram of the present invention;

[0030] Figure 3 It is a front view of the present invention;

[0031] Figure 4 For the present invention Figure 3 Sectional view at AA in the middle;

[0032] Figure 5 For the present invention Figure 4 The enlarged view of point B in the middle;

[0033] Figure 6 It is a schematic diagram of the state when the collision ball is offset from the vibration rod under the centrifugal force in the present invention;

[0034] Figure 7 For the present invention Figure 4 Enlarged view of point C in the middle;

[0035] Figure 8 For the present invention Figure 4 Enlarged view of point D in the middle.

[0036] In the figure: 1. heat pump fan; 101. chassis; 102. impeller; 103. drive motor; 104. heat exchange plate; 105. liquid guide tube; 2. air inlet; 3. air inlet grille; 4. air outlet; 5. air outlet grille; 6. filter screen; 7. atomizing nozzle; 8. water tank; 9. connecting rod; 10. ventilation gap; 11. slide groove; 12. centrifugal block; 13. first spring; 14. trigger button; 15. blocking ring; 16. U-shaped mouth; 17. fixing ring; 18. second spring; 19. vibration rod; 20. collision ball; 21. scraper; 22. collecting tank; 23. collecting hole; 24. limit block; 25. limit groove; 26. third spring; 27. baffle. DETAILED DESCRIPTION

[0037] See also Figures 1 to 8 The present invention provides an ultra-low temperature air source full DC variable frequency heat pump, and the technical solution is as follows:

[0038] A super-low temperature air source full DC variable frequency heat pump comprises a heat pump fan 1, which further comprises a chassis 101, an impeller 102, a drive motor 103, a heat exchange plate 104, and a liquid guide tube 105. The chassis 101 is provided with an air inlet 2, and an air inlet grille 3 is provided at the port of the air inlet 2. The impeller 102 is arranged in the air inlet 2 for sucking air into the chassis 101. The drive motor 103 is used to drive the impeller 102 to rotate. The liquid guide tube 105 is fixedly installed in the chassis 101, and a liquid for heat exchange with air circulates in the liquid guide tube 105. There are multiple heat exchange plates 104, and the multiple heat exchange plates 104 are evenly and fixedly connected to the liquid guide tube 105. The chassis 101 is also provided with an air outlet 4, an air outlet grille 5 is provided at the air outlet 4, a filter screen 6 is provided inside the air inlet 2, the filter screen 6 is a circular filter screen 6, a connecting rod 9 is coaxially fixedly installed at the end face center of the impeller 102, the filter screen 6 is slidably installed on the connecting rod 9, a limiting block 24 is provided on the connecting rod 9, a limiting groove 25 matching the limiting block 24 is provided on the filter screen 6, the limiting block 24 is inserted into the limiting groove 25 to prevent the filter screen 6 and the connecting rod 9 from rotating relative to each other, and a third spring 26 is provided on the connecting rod 9, the third spring 26 is used to keep the filter screen 6 pushed toward the direction of the air inlet grille 3, and the filter screen 6 can rotate with the impeller 102 under the restriction of the limiting block 24 and the limiting groove 25. An annular ventilation gap 10 is provided between the outer edge of the filter screen 6 and the inner wall of the air inlet 2.

[0039] refer to Figure 4 , Figure 5 , Figure 6 and Figure 8 Two blocking rings 15 are arranged inside the air inlet 2. The two blocking rings 15 are respectively located in front of and behind the filter 6. The distance between the two blocking rings 15 and the filter 6 is 1-2 cm. The two blocking rings 15 are fixedly installed on the air inlet 2. The width of the blocking rings 15 is the same as the width of the ventilation gap 10. A U-shaped opening 16 is formed between the two blocking rings 15 and the filter 6.

[0040] refer to Figure 4 and Figure 8 A scraper 21 is vertically fixedly installed in the air inlet 2, and the scraper 21 is located between the two blocking rings 15. The scraper 21 is in contact with the side of the filter screen 6 facing the air inlet grille 3. One end of the scraper 21 is fixedly connected to the air inlet 2, and the other end is located at the center of the filter screen 6. A collection tank 22 is arranged outside the air inlet 2, and the collection tank 22 is located directly below the scraper 21. A collection hole 23 is opened on the side wall of the air inlet 2 under the scraper 21, and the collection hole 23 is connected to the collection tank 22. A baffle 27 is arranged in the collection hole 23, and the baffle 27 is inclined downward in the direction of the collection tank 22.

[0041] refer to Figure 4 , Figure 5 and Figure 6 A wetting component for wetting the filter 6 is also provided inside the air inlet 2. The wetting component includes an atomizing nozzle 7 provided inside the air inlet 2. The atomizing nozzle 7 faces the direction of the filter 6. A water tank 8 is provided outside the air inlet 2. The water tank 8 is connected to the atomizing nozzle 7. In addition, the wetting component also includes two slide grooves 11 fixedly installed at the outer edge of the filter 6, the two slide grooves 11 are evenly distributed at the outer edge of the filter 6, and centrifugal blocks 12 are slidably installed inside the slide grooves 11. A first spring 13 is arranged between the centrifugal block 12 and the bottom of the slide groove 11. One end of the first spring 13 is fixedly connected to the centrifugal block 12, and the other end is fixedly connected to the bottom of the slide groove 11. The first spring 13 is a tension spring, and the first spring 13 is used to keep the centrifugal block 12 accommodated in the slide groove 11; a trigger button 14 is arranged on the inner wall of the air inlet 2, and the trigger button 14 is a jog button. The trigger button 14 is used to control the start of the atomizing nozzle 7, and the trigger button 14 and the filter 6 are located in the same plane

[0042] refer to Figures 4 to 6 as well as Figure 8As for the air intake grille 3, the air intake grille 3 is slidably mounted on the air intake port 2, a fixing ring 17 is arranged on the end surface of the air intake port 2, a plurality of second springs 18 are arranged on the air intake port 2, and the plurality of second springs 18 are evenly distributed in the air intake port 2. One end of the second spring 18 is fixedly connected to the fixing ring 17, and the other end is fixedly connected to the air intake grille 3. The second spring 18 is used to keep the air intake grille 3 pushed toward the filter screen 6; a vibration rod 19 is fixedly mounted on the side of the air intake grille 3 facing the filter screen 6, and the vibration rod 19 It extends toward the filter screen 6 along the axial direction of the connecting rod 9, and a collision ball 20 is provided at one end of the centrifugal block 12 close to the opening of the slide groove 11. The collision ball 20 is located outside the slide groove 11, and the diameter of the collision ball 20 is greater than the width of the centrifugal block 12. The vibration rod 19 does not intersect with the plane where the centrifugal block 12 is located; the vibration rod 19 is located on the circular trajectory of the collision ball 20 rotating around the connecting rod 9 when the first spring 13 is in a natural state, and the projection of the vibration rod 19 in the axial direction of the connecting rod 9 intersects with the projection of the collision ball 20 in the axial direction of the connecting rod 9.

[0043] refer to Figure 4 When in use, the driving motor 103 drives the impeller 102 to rotate. After the impeller 102 rotates, it disturbs the air and sucks the air into the chassis 101 from the air inlet 2, and discharges it from the air outlet 4 through the air outlet grille 5 to the outside of the chassis 101. After the air enters the chassis 101, it contacts the heat exchange plate 104. The heat exchange plate 104 exchanges heat with the air and transfers the heat in the air to the guide tube. The guide tube then exchanges heat with the liquid inside the guide tube, thereby transferring the heat in the air to the liquid inside the heat conduction tube. When the impeller 102 sucks air into the chassis 101, the air inlet grille 3 blocks larger debris in the air, such as leaves and plastic bags, at the air inlet 2 and outside the chassis 101, and the filter 6 filters the dust carried by the air to prevent the air from sucking a large amount of dust into the chassis 101.

[0044] refer to Figure 4 Figure 5 and Figure 6 During the rotation of the impeller 102, the filter screen 6 and the centrifugal block 12 on the filter screen 6 also rotate synchronously with the impeller 102. The centrifugal block 12 on the filter screen 6 will be thrown out of the chute 11 after being subjected to the centrifugal force, and finally the collision ball 20 on the centrifugal block 12 will press against the inner wall of the air inlet 2 and slide along the inner wall of the air inlet 2. When the centrifugal block 12 passes through the trigger button 14, it will collide with the trigger button 14 and press the trigger button 14. After the trigger button 14 is pressed, it will control the atomizing nozzle 7 to spray water mist, and the water mist will moisten the filter screen 6, thereby improving the filter screen 6's blocking effect on dust in the air. When the collision ball 20 leaves the trigger button 14, the trigger button 14 controls the atomizing nozzle 7 to stop spraying water mist, thereby controlling the water mist to spray periodically according to the rotation speed of the impeller 102.

[0045] refer to Figure 4 , Figure 7 and Figure 8 During the rotation of the filter 6, the scraper 21 scrapes against the surface of the filter 6. After the filter 6 absorbs dust in the air onto the surface of the filter 6, the scraper 21 scrapes off the dust on the filter 6 after the filter 6 passes through the scraper 21. The dust scraped off by the filter 6 falls downward between the two blocking rings 15, and enters the collecting groove 22 from the collecting hole 23 on the lower side of the scraper 21 and is collected.

[0046] refer to Figure 4 , Figure 5 , Figure 6 and Figure 8 In addition, each time the impeller 102 is started, the speed of the impeller 102 is relatively slow, and the filter screen 6 rotates synchronously with the impeller 102, so the speed of the filter screen 6 is also relatively slow, and the centrifugal force on the centrifugal block 12 inside the chute 11 is relatively small. Therefore, the centrifugal block 12 is kept inside the chute 11 under the pulling force of the first spring 13. When the centrifugal block 12 is kept inside the chute 11, when the centrifugal block 12 passes through the vibration rod 19, the collision ball 20 on the centrifugal block 12 will collide with the vibration rod 19. After the collision ball 20 collides with the vibration rod 19, the collision ball 20 squeezes the vibration rod 19 and squeezes the vibration rod 19 toward the direction of the air intake grille 3. The second spring 18 is compressed, and the vibration rod 19 also gives the collision ball 20 a force in the opposite direction. The collision ball 20 will be pushed toward the direction of the impeller 102, and the third spring 26 is compressed. In this way, the collision ball 20 and the vibration rod 19 can be staggered with each other. After the collision ball 20 and the vibration rod 19 are staggered, the filter 6 can continue to rotate with the impeller 102. When the collision ball 20 and the vibration rod 19 are staggered, the second spring 18 drives the air intake grille 3 to reset, and the third spring 26 drives the filter 6 to reset. When the collision ball 20 collides with the vibration rod 19, the dust adhering to the filter 6 can be vibrated off, further ensuring that dust will not accumulate on the filter 6 and affect the ventilation effect of the filter 6. After being shaken off, the dust will fall into the U-shaped opening 16 formed between the two blocking rings 15, and finally slide along the inner wall of the air inlet 2 to the collecting hole 23, and enter the collecting tank 22 from the collecting hole 23 to be collected. After the air inlet grille 3 is vibrated, the debris on the air inlet grille 3 can also be shaken off to avoid clogging of the air inlet grille 3.

[0047] When the speed of the impeller 102 increases, Figure 6 The centrifugal force pulls the centrifugal block 12 toward the outside of the slide groove 11. When the collision ball 20 slides along the inner wall of the air inlet 2, the collision ball 20 no longer contacts the vibration rod 19 when it rotates to the vibration rod 19. At the same time, the vibration rod 19 will not contact the centrifugal block 12, thereby preventing the collision ball 20 from hitting the vibration rod 19 and causing damage under high-speed rotation.

[0048] When the driving motor 103 stops, Figure 5 The rotation speed of the impeller 102 gradually decreases, and the centrifugal block 12 is retracted into the chute 11 under the action of the first spring 13. Therefore, when the centrifugal block 12 passes through the vibration rod 19, it will collide with the vibration rod 19 again, and the filter 6 and the air intake grille 3 will be cleaned again.

[0049] refer to Figure 5 , Figure 6 and Figure 8 When the impeller 102 is running at high power, the existence of the filter 6 will form a certain obstruction to the air. When the impeller 102 sucks the air into the chassis 101, the air driven by the impeller 102 will first contact the filter 6, and most of the air will pass through the filter 6 from the filter holes of the filter 6 and enter the chassis 101. After hitting the filter 6, a small part of the air moves along the surface of the filter toward the U-shaped opening 16 and enters the inside of the U-shaped opening. At the same time, when the air collides with the filter 6, the dust in the air will be left on the filter 6. The air entering the U-shaped opening 16 will carry less dust. After entering the U-shaped opening 16, the air will go around the filter 6 from the U-shaped opening 16 and enter the inside of the chassis 101. In the process of air bypassing the U-shaped opening 16, since the air first collides with the filter 6 and slows down, the air entering the U-shaped opening 16 has a lower speed than the air directly entering the chassis from the filter 6, and the speed of the dust it carries will also be reduced. After the air bypasses the filter 6 and before the air comes out of the U-shaped opening 16, the air will once again collide with the blocking ring 15 set between the filter 6 and the impeller 102 and slow down. After two decelerations, the dust carried in the air will remain in the U-shaped opening 16 under its own gravity and the blocking effect of the blocking ring 15, and will slide along the inner wall of the air inlet 2 to the collection hole 23 under the action of its own gravity, and finally enter the collection tank 22 from the collection hole 23. The setting of the U-shaped opening 16 not only ensures the air intake of the heat pump fan 1, but also reduces the dust entering the chassis 101.

[0050] In addition, during use, in order to ensure that the centrifugal block 12 can stably trigger the atomizing nozzle 7 to wet the filter 6, ensure the filtering effect of the filter 6 on dust in the air, and reduce the dust from entering the chassis 101 and contacting the heat exchange plate 104. If the drive motor 103 needs to keep rotating at a low speed for a long time, and the low-speed rotation of the drive motor 103 causes the centrifugal block 12 to be unable to press the trigger button 14, the drive motor 103 can be periodically controlled by a pulse signal, such as increasing the speed of the drive motor 103 every 20 minutes, allowing the drive motor 103 to rotate at a high speed for 10-20 seconds and then returning to a low speed, so that the drive motor 103 can have enough speed to drive the filter 6 to throw the centrifugal block 12 out of the chute 11, so as to ensure that the trigger button 14 can be periodically pressed by the centrifugal block 12, and the filtering performance of the filter 6 on dust in the air is ensured.

[0051] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. An ultra-low temperature air source full DC variable frequency heat pump, comprising a heat pump fan (1), the heat pump fan (1) further comprising a chassis (101), an impeller (102), a drive motor (103), a heat exchange plate (104), and a liquid guide tube (105); the chassis (101) is provided with an air inlet (2), an air inlet grille (3) is provided at the end of the air inlet (2), the impeller (102) is arranged in the air inlet (2) for transferring air The liquid is sucked into the inside of the chassis (101), the driving motor (103) is used to drive the impeller (102) to rotate, the liquid guide pipe (105) is fixedly installed in the chassis (101), there are a plurality of heat exchange fins (104), and the plurality of heat exchange fins (104) are evenly fixedly installed on the liquid guide pipe (105), the chassis (101) is also provided with an air outlet (4), and an air outlet grille (5) is provided at the air outlet (4), characterized in that: A filter screen (6) is arranged inside the air inlet (2), and a wetting component for wetting the filter screen (6) is also arranged inside the air inlet (2), and the wetting component comprises an atomizing nozzle (7) arranged inside the air inlet (2), and the atomizing nozzle (7) faces the direction of the filter screen (6). A water tank (8) is arranged outside the air inlet (2), and the water tank (8) is connected to the atomizing nozzle (7).

2. The ultra-low temperature air source full DC variable frequency heat pump according to claim 1, characterized in that: The filter screen (6) is in the shape of a circular disc as a whole. A connecting rod (9) is provided at the center of the end surface of the impeller (102). The filter screen (6) is coaxially mounted on the connecting rod (9) and rotates with the impeller (102).

3. The ultra-low temperature air source full DC variable frequency heat pump according to claim 2, characterized in that: An annular ventilation gap (10) is provided between the outer edge of the filter (6) and the inner wall of the air inlet (2); the wetting component further comprises two slide grooves (11) fixedly mounted at the outer edge of the filter (6); the two slide grooves (11) are evenly distributed at the outer edge of the filter (6); centrifugal blocks (12) are slidably mounted inside the slide grooves (11); a first spring (13) is provided between the centrifugal blocks (12) and the bottom of the slide groove (11); one end of the first spring (13) is fixedly connected to the centrifugal blocks (12) and the other end is fixedly connected to the bottom of the slide groove (11); the first spring (13) is used to keep the centrifugal blocks (12) stored inside the slide groove (11); a trigger button (14) is provided on the inner wall of the air inlet (2); the trigger button (14) is used to control the start of the atomizing nozzle (7); the trigger button (14) is a jog button; the trigger button (14) and the filter (6) are located in the same plane.

4. The ultra-low temperature air source full DC variable frequency heat pump according to claim 3, characterized in that: Two blocking rings (15) are arranged inside the air inlet (2). The two blocking rings (15) are respectively located in front of and behind the filter (6). The distance between the two blocking rings (15) and the mesh surface of the filter (6) is 1-2 cm. The two blocking rings (15) are fixedly mounted on the air inlet (2). The width of the blocking rings (15) is the same as the width of the ventilation gap (10). A U-shaped opening (16) is formed between the two blocking rings (15) and the filter (6).

5. The ultra-low temperature air source full DC variable frequency heat pump according to claim 3, characterized in that: The air intake grille (3) is slidably mounted on the air intake port (2); a fixing ring (17) is arranged on the end surface of the air intake port (2); a plurality of second springs (18) are arranged on the air intake port (2); the plurality of second springs (18) are evenly distributed around the air intake port (2); one end of each of the second springs (18) is fixedly connected to the fixing ring (17); and the other end of each of the second springs (18) is fixedly connected to the air intake grille (3); the second springs (18) are used to keep the air intake grille (3) pushed in the direction of the filter screen (6); a vibration rod (19) is fixedly mounted on the side of the air intake grille (3) facing the filter screen (6); the vibration rod (19) is connected to the filter screen (6) and is movable along the air intake grille (3) to move in the direction of the filter screen (6); The axial direction of the rod (9) extends toward the filter screen (6); a collision ball (20) is arranged at one end of the centrifugal block (12) close to the opening of the chute (11); the collision ball (20) is located outside the chute (11); the diameter of the collision ball (20) is greater than the width of the centrifugal block (12); the vibration rod (19) does not intersect with the plane where the centrifugal block (12) is located; the vibration rod (19) is located on a circular trajectory of the collision ball (20) rotating around the connecting rod (9) when the first spring (13) is in a natural state, and the projection of the vibration rod (19) in the axial direction of the connecting rod (9) intersects with the projection of the collision ball (20) in the axial direction of the connecting rod (9).

6. The ultra-low temperature air source full DC variable frequency heat pump according to claim 4, characterized in that: A scraper (21) is vertically fixedly installed in the air inlet (2), the scraper (21) is located between the two blocking rings (15), the scraper (21) is in contact with a side of the filter (6) facing the air inlet grille (3), one end of the scraper (21) is fixedly connected to the air inlet (2), and the other end is located at the center of the filter (6), a collecting groove (22) is arranged outside the air inlet (2), the collecting groove (22) is located directly below the scraper (21), and a collecting hole (23) is opened on the side wall of the air inlet (2) below the scraper (21), and the collecting hole (23) is connected to the collecting groove (22).

7. The ultra-low temperature air source full DC variable frequency heat pump according to claim 5, characterized in that: The filter (6) is slidably mounted on the connecting rod (9); a limit block (24) is arranged on the connecting rod (9); a limit groove (25) matching the limit block (24) is arranged on the filter (6); the limit block (24) is inserted into the limit groove (25) to prevent the filter (6) and the connecting rod (9) from rotating relative to each other; a third spring (26) is arranged on the connecting rod (9); the third spring (26) is used to keep the filter (6) pushed toward the air intake grille (3).

8. The ultra-low temperature air source full DC variable frequency heat pump according to claim 6, characterized in that: A baffle (27) is arranged in the collecting hole (23), and the baffle (27) is inclined downward in the direction of the collecting tank (22).

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