Heat pump water heater

Abstract

The invention discloses a heat pump water heater, and belongs to the technical field of water heaters. A heat pump water heater comprises a water heater shell and a displayer installed on the outer wall of the water heater shell, a water tank is arranged in the water heater shell, the heat pump water heater further comprises a filtering assembly and a heating assembly which are arranged in the water tank, the filtering assembly and the heating assembly are fixedly connected, the filtering assembly is located above the heating assembly, and the displayer is arranged on the outer wall of the water heater shell. The filtering assembly is close to a water inlet in the top of the water tank; the preheating box is arranged in the water tank, and a pretreatment assembly used for prolonging the water storage time is arranged in the preheating box; cold water is subjected to auxiliary heating, and the water area heating area is guaranteed as much as possible; hot water enters the spiral pipe through the water inlet hopper to be continuously heated and is conveyed into the water tank through the flow guide pipe at the same time, in the flowing process, the water area where the flow guide pipe passes can be heated, and therefore cold water in the water tank is further evenly heated; impact of water flow is used as driving force for reciprocating motion of the filter screen.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and in particular to a heat pump water heater. Background Art

[0002] With the rapid development of the economy, people pay more and more attention to the quality of life and have higher requirements for the comfort and convenience of showering. Air source heat pump water heaters can use very little electricity to heat the required hot water. Its wide range of uses and high energy efficiency ratio are gradually accepted by the market. However, air source heat pump water heaters also have problems such as huge size and a sharp drop in efficiency when the external ambient temperature drops. Phase change materials have the advantages of high energy storage density and small size. If part of the heat storage medium is converted into phase change energy storage materials, the volume of the air source heat pump water heater can be further reduced.

[0003] A heat pump water heater includes a hot water tank and a heat pump device for heating water in the hot water tank. In the heat pump water heater, the heat pump device is arranged in a heating circuit for conveying hot water flowing out from the lower part of the hot water tank to the upper part of the hot water tank. A pump for conveying water is also arranged in the heating circuit. In addition, the heat pump water heater has a bypass passage branching from the heating circuit on the downstream side of the heat pump device and connected to the lower part of the hot water tank.

[0004] In existing water tanks, heating pipes are often set at the bottom or side walls of the tank. The water temperature is easily improperly zoned, resulting in uneven water temperature, affecting the user's comfort. In addition, long-term accumulation of scale and corrosion in the water tank not only consumes energy during use but also has low heating efficiency, causing great losses to users. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art that the heating device is often arranged at the bottom of the box or the side wall of the box, the water temperature is easily improperly zoned, resulting in uneven water temperature being extracted, affecting the comfort of the user; and the scaling and corrosion accumulated in the water tank for a long time not only consume energy when in use but also have low heating efficiency, causing great losses to the user, and thus a heat pump water heater is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A heat pump water heater comprises a water heater shell and a display installed on the outer wall of the water heater shell, wherein a water tank is arranged in the water heater shell, and further comprises: a filter component and a heating component arranged in the water tank, wherein the filter component and the heating component are fixedly connected, wherein the filter component is located above the heating component and the filter component is close to the water inlet at the top of the water tank; and a preheating box arranged in the water tank, wherein a pretreatment component for extending the water storage time is arranged in the preheating box.

[0008] Preferably, a radiator is arranged above the water tank in the water heater housing, the radiator and the water tank are connected via a water pump, one side of the radiator is connected to an expander, and one side of the expander is connected to an evaporator.

[0009] Preferably, the filter assembly includes a filter screen floatingly arranged in the water tank, a mounting plate is arranged at the bottom of the filter screen, the mounting plate is slidably connected to the inner wall of the water tank, a fixing plate is fixedly installed on the inner wall of the water tank, and a spring is connected between the mounting plate and the fixing plate.

[0010] Preferably, the heating assembly includes a second heating rod and a first heating rod connected to the second heating rod, connecting rods are connected at both ends of the second heating rod, the connecting rods are slidably connected to the fixed plate, and the top of the connecting rod is fixedly connected to the lower surface of the mounting plate, and a connecting sleeve is fixedly installed on the surface of the first heating rod, and the connecting sleeve is fixedly connected to the top of the filter.

[0011] Preferably, the pretreatment component comprises a spiral tube, the top end of the spiral tube is connected to a water inlet hopper, the bottom end of the spiral tube is fixedly connected to a guide tube, the bottom end of the guide tube extends to the inside of the water tank, and the outer wall of the spiral tube is provided with a wing plate.

[0012] In order to use the airbag to introduce the hot water in the preheating box into the bottom of the water tank as quickly as possible, further, the outside of the spring is connected with an airbag between the mounting plate and the fixed plate, the airbags are connected with shunt pipes, the shunt pipes are connected with connecting pipes, the guide pipe and the connecting pipe are connected, and the bottom of the airbag is connected with a drain valve.

[0013] In order to preheat the cold water and shorten the time required to heat a large amount of cold water in the water tank, further, the top of the preheating box is fixedly connected to a water inlet pipe, the top of the first heating rod extends through the preheating box, and a turbine is fixedly installed on the top of the first heating rod. The turbine is arranged directly below the water outlet of the water inlet pipe, and a paddle is fixedly installed on the outer wall of the first heating rod, and the paddle and wing plate are arranged to fit together in the vertical direction.

[0014] In order to drive the rotating shaft to rotate during the process of releasing water flow from the preheating box, further, an overflow pipe is fixedly connected to the top of one side of the preheating box, a rotating shaft is rotatably connected between the outer wall of the preheating box and the inner wall of the water tank, an impeller is fixedly installed on the surface of the rotating shaft, and the water outlet of the overflow pipe is located directly above the impeller.

[0015] In order to utilize the rotation of the cam to drive the filter to float, further, a cam is fixedly installed at one end of the rotating shaft, a wheel groove is opened in the cam, a connecting frame is fixedly connected to one side of the connecting sleeve, a driving rod is fixedly connected to one side of the connecting frame, a connecting block is fixedly installed on the top of the driving rod, and the connecting block is slidably engaged in the wheel groove.

[0016] Preferably, the water pump is connected to a water pumping pipe, one end of which extends into the water tank, and a dredging rod is fixedly mounted on one side of the connecting frame, and the dredging rod is floated in the water pumping pipe following the connecting frame.

[0017] Compared with the prior art, the present invention provides a heat pump water heater having the following beneficial effects:

[0018] 1. The heat pump water heater, by arranging a heating component in the water tank, includes a second heating rod, and the second heating rod can assist in heating the cold water stored in the water tank, thereby ensuring the largest possible heating area of ​​the water area;

[0019] 2. The heat pump water heater preheats the cold water in the preheating box by arranging a preheating box in the water tank and extending the first heating rod of the heating assembly into the preheating box, thereby accelerating the heating speed in the water tank. At the same time, the preheated water enters the spiral tube through the water inlet hopper and is continuously heated. At the same time, the preheated water is transported to the water tank through the guide pipe. During the flow process, the water area passed by the guide pipe can also be heated, thereby further uniformly heating the cold water in the water tank.

[0020] 3. The heat pump water heater is provided with a floating filter. When the filter is stretched, the top of the filter moves down and the filter is reset. The filter floats back and forth in the water tank. In addition to the loose / tight alternation of the material properties of the filter itself, the spring at the bottom is also used to pull the entire filter, thereby increasing the floating range of the filter in the water tank as much as possible, mixing the water, further preventing water temperature zoning, and uniformly heating the cold water.

[0021] 4. The heat pump water heater is provided with a pretreatment component in the preheating tank, the pretreatment component includes a spiral tube and a guide tube connected to the bottom end of the spiral tube. The preheated water enters the spiral tube through the water inlet hopper and is continuously heated. At the same time, it is transported to the water tank through the guide tube. During the flow process, the water area through the guide tube can be heated, thereby further uniformly heating the cold water in the water tank.

[0022] 5. The heat pump water heater is connected to an overflow pipe at one side of the preheating tank. An impeller is arranged below the water outlet of the overflow pipe. The water flow impacts the impeller, so that the impeller drives the rotating shaft to rotate, thereby driving the cam on the surface of the rotating shaft to rotate. During the rotation of the cam, the connecting block in the cam groove is lifted or lowered following the rotation of the cam, thereby using the falling water flow as the driving force for the reciprocating movement of the filter screen, saving the use of the power system;

[0023] 6. The heat pump water heater is provided with an air bag and utilizes the up and down floating of the filter to squeeze the air bag. The air bag is connected with the guide pipe, the spiral pipe and the water inlet bucket in sequence. Therefore, when the air bag is compressed, the cold water in the spiral pipe and the guide pipe can be quickly drawn into the air bag. When compressed again, it can be discharged through the drain valve.

[0024] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The present invention performs auxiliary heating of cold water to ensure the largest possible heating area of ​​the water area; accelerates the heating speed in the water tank, and at the same time, preheated water enters the spiral tube through the water inlet bucket and is continuously heated, and is transported to the water tank through the guide pipe. During the flow, the water area passed by the guide pipe can also be heated, thereby further uniformly heating the cold water in the water tank. During the rotation of the cam, the connecting block in the cam groove is lifted or lowered following the rotation of the cam, thereby utilizing the falling water flow as the driving force for the reciprocating movement of the filter screen, saving the use of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the three-dimensional structure of a heat pump water heater proposed by the present invention;

[0026] Figure 2 A schematic diagram of a cross-sectional three-dimensional structure of a heat pump water heater proposed by the present invention;

[0027] Figure 3 A schematic diagram of the partial structure of a heating component of a heat pump water heater proposed by the present invention;

[0028] Figure 4 A heat pump water heater proposed by the present invention Figure 3 The enlarged structural diagram of part A in the middle;

[0029] Figure 5 A schematic diagram of the internal three-dimensional structure of a water tank of a heat pump water heater proposed by the present invention;

[0030] Figure 6 A schematic diagram of a partial three-dimensional structure of a pretreatment component of a heat pump water heater proposed by the present invention;

[0031] Figure 7 A schematic diagram of a cam drive three-dimensional structure of a heat pump water heater proposed by the present invention;

[0032] Figure 8 This is a schematic diagram of the related structure of the dredging rod of a heat pump water heater proposed by the present invention.

[0033] In the figure: 1. water heater shell; 2. display; 3. radiator; 4. water tank; 5. water pump; 6. expander; 7. evaporator; 8. preheating box; 9. water inlet pipe; 10. overflow pipe; 11. rotating shaft; 12. impeller; 13. cam; 14. wheel groove; 15. driving rod; 16. connecting block; 17. connecting frame; 18. connecting sleeve; 19. first heating rod; 20. dial plate; 21. turbine; 22. spiral tube; 23. wing plate; 24. water inlet bucket; 25. filter screen; 26. mounting plate; 27. second heating rod; 28. fixing plate; 29. ​​air bag; 30. drain valve; 31. connecting rod; 32. guide pipe; 33. connecting pipe; 34. shunt pipe; 35. pumping pipe; 36. dredging rod; 37. spring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] Example:

[0037] Reference Figure 1-Figure 8 A heat pump water heater comprises a water heater shell 1 and a display 2 installed on the outer wall of the water heater shell 1, a water tank 4 is arranged in the water heater shell 1, a radiator 3 is arranged above the water tank 4 in the water heater shell 1, the radiator 3 and the water tank 4 are connected through a water pump 5, an expander 6 is connected to one side of the radiator 3, and an evaporator 7 is connected to one side of the expander 6.

[0038] The evaporator 7 is closely fitted to the inner wall of the water heater housing 1, so that the evaporator 7 obtains a maximized evaporation area, thereby increasing the heating capacity of the heat pump water heater without changing the overall volume of the heat pump water heater, thereby improving the heating efficiency.

[0039] In this embodiment, a water tank 4 is provided in the water heater housing 1. After the cold water enters the water tank 4, the water pump 5, the expander 6 and the evaporator 7 are controlled in sequence by an external PLC. A small amount of electric energy is used to drive the compressor to operate. The high-pressure liquid working medium evaporates into a gaseous state in the evaporator 7 after passing through the expansion valve, and absorbs a large amount of heat energy from the air; the gaseous working medium is compressed by the compressor into a high-temperature, high-pressure liquid, and then enters the condenser to release heat and heat the water. The heating is continuously circulated in this way, and the water can be heated to 50°C-65°C.

[0040] It also includes: a filter assembly and a heating assembly disposed in the water tank 4, the filter assembly and the heating assembly are fixedly connected, the filter assembly is located above the heating assembly, and the filter assembly is close to the water inlet at the top of the water tank 4;

[0041] Considering that water flows back and forth in the pipes of the heat pump water heater, in order to avoid the deposition of impurities and scale in the pipes, a reciprocating filter 25 is provided in the water tank 4. The water flows into the bottom of the water tank 4 through the filter 25, so that impurities and scale can finally adhere to the filter 25.

[0042] The filter assembly includes a filter screen 25 floatingly arranged in the water tank 4, a mounting plate 26 is arranged at the bottom of the filter screen 25, the mounting plate 26 is slidably connected to the inner wall of the water tank 4, a fixing plate 28 is fixedly installed on the inner wall of the water tank 4, and a spring 37 is connected between the mounting plate 26 and the fixing plate 28.

[0043] In this embodiment, a mounting plate 26 is fixedly connected to the bottom surface of the filter screen 25, and the mounting plate 26 is slidably connected to the inner wall of the water tank 4. A fixing plate 28 is fixedly provided on the inner wall of the water tank 4. When the top of the filter screen 25 is pulled, the filter screen 25 is stretched, and the filter screen 25 is reset after the top of the filter screen 25 moves down. The filter screen 25 floats back and forth in the water tank 4. In addition to the loose / tight alternation of the material properties of the filter screen 25 itself, the spring 37 at the bottom is also used to pull the entire filter screen 25, thereby increasing the floating range of the filter screen 25 in the water tank 4 as much as possible, mixing the water, and further preventing water temperature zoning.

[0044] At the same time, a filter screen 25 is provided to reduce scaling, corrosion and the like accumulated over a long period of time in the water tank 4 as much as possible, thereby reducing energy consumption and improving heating efficiency.

[0045] The heating assembly includes a second heating rod 27 and a first heating rod 19 connected to the second heating rod 27. The second heating rod 27 is connected to connecting rods 31 at both ends. The connecting rods 31 penetrate and slide in the fixing plate 28, and the top of the connecting rods 31 is fixedly connected to the lower surface of the mounting plate 26. The surface of the first heating rod 19 is fixedly mounted with a connecting sleeve 18, and the connecting sleeve 18 is fixedly connected to the top of the filter screen 25. The preheating box 8 is arranged in the water tank 4.

[0046] In this embodiment, a heating component is arranged in the water tank 4 to assist in heating the cold water and ensure that the heating area of ​​the water area is as large as possible. Specifically, it includes a second heating rod 27 and a first heating rod 19. Both ends of the second heating rod 27 are connected to the bottom of the mounting plate 26 through a connecting rod 31. The first heating rod 19 is connected to the second heating rod 27 and extends into the preheating box 8. The top of the filter screen 25 is connected to the outer wall of the first heating rod 19 through a connecting sleeve 18. When the filter screen 25 floats, it drives the first heating rod 19 to swing up and down.

[0047] The top of the preheating box 8 is fixedly connected to a water inlet pipe 9, the top of the first heating rod 19 extends into the preheating box 8, a turbine 21 is fixedly installed on the top of the first heating rod 19, the turbine 21 is arranged just below the water outlet of the water inlet pipe 9, and a dial plate 20 is fixedly installed on the outer wall of the first heating rod 19.

[0048] In this embodiment, a water inlet pipe 9 is connected to the top of the preheating box 8, and cold water flows into the preheating box 8 through the water inlet pipe 9. During the inflow of cold water, the turbine 21 is impacted, causing the turbine 21 to rotate, which can stir the water in the preheating box 8 to quickly preheat it.

[0049] The first heating rod 19 can preheat the cold water in the preheating box 8, and because the first heating rod 19 slides up and down, the dial plate 20 on the outer wall of the first heating rod 19 can also slide up and down.

[0050] A pretreatment component for extending the water storage time is provided in the preheating box 8, and the pretreatment component includes a spiral tube 22. The top of the spiral tube 22 is connected to a water inlet hopper 24, and the bottom end of the spiral tube 22 is fixedly connected to a guide pipe 32. The bottom end of the guide pipe 32 extends to the inside of the water tank 4. The outer wall of the spiral tube 22 is provided with a wing plate 23, and the paddle 20 and the wing plate 23 are arranged in a vertical direction.

[0051] In this embodiment, a pretreatment component is provided in the preheating box 8, and the pretreatment component includes a spiral tube 22 and a guide tube 32 connected to the bottom end of the spiral tube 22. The preheated water enters the spiral tube 22 through the water inlet hopper 24 and is continuously heated. At the same time, it is transported to the water tank 4 through the guide tube 32. During the flow process, the water area passed by the guide tube 32 can also be heated, thereby further evenly heating the cold water in the water tank 4.

[0052] It should be noted that the first heating rod 19 moves up and down to drive the shift plate 20, thereby lifting the wing plate 23 or driving the wing plate 23 to return to its original position.

[0053] The outside of the spring 37 is connected to an airbag 29 between the mounting plate 26 and the fixing plate 28, a shunt pipe 34 is connected between the airbags 29, a connecting pipe 33 is connected between the shunt pipes 34, the guide pipe 32 and the connecting pipe 33 are connected, and a drain valve 30 is connected to the bottom of the airbag 29.

[0054] In this embodiment, an airbag 29 is provided outside the spring 37. The airbag 29 is connected to the guide pipe 32 through the connecting pipe 33 and the diversion pipe 34. The airbag 29 is also squeezed in the process of floating and squeezing the spring 37 through the filter 25, so that the hot water in the guide pipe 32 is discharged into the water tank 4 through the drain valve 30, and the water area where the airbag 29 is located is heated. At the same time, the hot water discharged from the drain valve 30 impacts the nearby water area with water flow, mixes water flows of different water temperatures, and further makes the water temperature in the water tank 4 uniform.

[0055] It should be noted that the overflow pipe 10 of the preheating box 8 is arranged at the inner top, and the water level must be higher than 2 / 3 of the overflow pipe 10 to discharge the water from the preheating box 8 into the water tank 4. In order to prevent the water from flowing out directly through the spiral tube 22, the opening of the water inlet hopper 24 is set to be smaller. The cold water in the preheating box 8 enters the spiral tube 22 after being heated, and flows to the bottom of the water tank 4 through the guide tube 32. Considering that the pressure in the water tank 4 is greater than the pressure in the spiral tube 22, an air bag 29 is provided. The air bag 29 is squeezed by the up and down floating of the filter net 25. The air bag 29 is connected with the guide tube 32, the spiral tube 22 and the water inlet hopper 24 in turn. Therefore, the air bag 29 is compressed, and the cold water in the spiral tube 22 and the guide tube 32 can be quickly drawn into the air bag 29. When compressed again, it can be discharged through the drain valve 30.

[0056] The drain valve 30 is configured as a one-way valve, and can only discharge the hot water in the preheating tank 8 into the water tank 4 .

[0057] An overflow pipe 10 is fixedly connected to the top of one side of the preheating box 8, a rotating shaft 11 is rotatably connected between the outer wall of the preheating box 8 and the inner wall of the water tank 4, an impeller 12 is fixedly installed on the surface of the rotating shaft 11, and the water outlet of the overflow pipe 10 is located directly above the impeller 12, a cam 13 is fixedly installed at one end of the rotating shaft 11, a wheel groove 14 is opened in the cam 13, a connecting frame 17 is fixedly connected to one side of the connecting sleeve 18, a driving rod 15 is fixedly connected to one side of the connecting frame 17, a connecting block 16 is fixedly installed on the top of the driving rod 15, and the connecting block 16 is slidably engaged in the wheel groove 14.

[0058] In this embodiment, an overflow pipe 10 is connected to one side of the preheating box 8, and an impeller 12 is arranged below the water outlet of the overflow pipe 10. The water flow impacts the impeller 12, so that the impeller 12 drives the rotating shaft 11 to rotate, thereby driving the cam 13 on the surface of the rotating shaft 11 to rotate. During the rotation of the cam 13, the connecting block 16 in the wheel groove 14 is lifted or lowered following the rotation of the cam 13, thereby utilizing the falling water flow as the driving force for the reciprocating movement of the filter screen 25.

[0059] The water pump 5 is connected to a water pumping pipe 35 , one end of which extends into the water tank 4 . A dredging rod 36 is fixedly mounted on one side of the connecting frame 17 . The dredging rod 36 is floated in the water pumping pipe 35 following the connecting frame 17 .

[0060] Taking into account that the water suction pipe 35 is above the filter screen 25, impurities and oil may clog the water suction pipe 35 during the reciprocating motion of the filter screen 25, therefore, the connecting frame 17 that moves up and down is used to drive the dredging rod 36 to reciprocate in the water suction pipe 35, thereby effectively preventing impurities and scale in the water from accumulating in the water suction pipe 35 and avoiding clogging of the water suction pipe 35.

[0061] It should be noted that an operating module is also provided in the water heater shell 1, and the operating module is used to set the temperature of the heated hot water between a specified lower limit temperature and a specified upper limit temperature; it also includes a control device, which is used for a hot water storage operation mode for heating the hot water to a temperature set by the operating unit and a freeze prevention operation mode for allowing the hot water to flow through each pipeline under specified freeze prevention conditions, wherein the control device includes: a freeze prevention operation start judgment unit for judging the start conditions of the above-mentioned freeze prevention operation mode; an operation state judgment unit for judging whether the operation unit is in an open state or a closed state; and a heating temperature determination unit for determining the hot water in the freeze prevention operation mode, and changing the heating temperature determined by the heating temperature determination unit according to the judgment of the operation state judgment unit.

[0062] The above principles and control devices are all prior art, so they will not be described in detail.

[0063] In the present invention, the PLC in the water heater housing 1 is started, and the electrical components such as the water pump 5, the expander 6 and the evaporator 7 are started in sequence, and at the same time, the water inlet pipe 9 is opened to inject water into the preheating tank 8;

[0064] The top of the preheating box 8 is connected to a water inlet pipe 9, and cold water flows into the preheating box 8 through the water inlet pipe 9. During the process of the cold water flowing in, the turbine 21 is impacted, so that the turbine 21 rotates, and the water in the preheating box 8 is stirred to be preheated quickly.

[0065] An overflow pipe 10 is connected to one side of the preheating box 8. An impeller 12 is arranged below the water outlet of the overflow pipe 10. The water flow impacts the impeller 12, so that the impeller 12 drives the rotating shaft 11 to rotate, thereby driving the cam 13 on the surface of the rotating shaft 11 to rotate. During the rotation of the cam 13, the connecting block 16 in the wheel groove 14 is lifted or lowered following the rotation of the cam 13, so that the falling of the water flow is used as the driving force for the reciprocating movement of the filter screen 25. The top of the filter screen 25 is connected to the outer wall of the first heating rod 19 through the connecting sleeve 18. When the filter screen 25 floats, it drives the first heating rod 19 to shake up and down;

[0066] At the same time, a pretreatment component is provided in the preheating box 8. The preheated water enters the spiral tube 22 through the water inlet hopper 24 and is continuously heated. At the same time, it is transported to the water tank 4 through the guide pipe 32. During the flow process, the water area through which the guide pipe 32 passes can also be heated, thereby further heating the cold water in the water tank 4 evenly. At the same time, the second heating rod 27 performs auxiliary heating on the cold water to ensure the largest possible heating area of ​​the water area.

[0067] After the hot water enters the water tank 4 through the spiral tube 22 and the guide tube 32 in sequence, the pressure difference is used to make the hot water flow slowly in the guide tube 32, thereby auxiliary heating the water area through which the guide tube 32 passes, further increasing the speed of heating the cold water;

[0068] The top of the preheating box 8 is connected to the water inlet pipe 9, and cold water flows into the preheating box 8 through the water inlet pipe 9. During the inflow of cold water, the turbine 21 is impacted, so that the turbine 21 rotates, and the water in the preheating box 8 can be stirred to make it quickly preheated; one end of the first heating rod 19 extends into the preheating box 8, and the outer wall of the spiral tube 22 is provided with a wing plate 23. The outer wall of the first heating rod 19 is fixedly installed with a paddle plate 20. The paddle plate 20 and the wing plate 23 are arranged in a vertical direction. The first heating rod 19 moves up and down to drive the paddle plate 20, thereby lifting the wing plate 23 or driving the wing plate 23 to reset, and can also drive the spiral tube 22 to float up and down in the preheating box 8, further mixing the water in the preheating box 8, so that the cold water is heated evenly;

[0069] An air bag 29 is arranged outside the spring 37. The air bag 29 is connected to the guide pipe 32 through the connecting pipe 33 and the shunt pipe 34. The air bag 29 is also squeezed in the process of the floating squeezing spring 37 by the filter 25, so that the hot water in the guide pipe 32 is discharged into the water tank 4 through the drain valve 30, and the water area where the air bag 29 is located is heated. At the same time, the hot water discharged by the drain valve 30 impacts the nearby water area with water flow, mixes water flows with different water temperatures, and further makes the water temperature in the water tank 4 uniform.

[0070] A connecting frame 17 is provided on one side of the connecting sleeve 18. The connecting sleeve 18 drives the connecting frame 17 to move up and down as the top of the filter screen 25 moves up and down, thereby driving the dredging rod 36 to reciprocate in the water suction pipe 35, effectively preventing impurities and scale in the water from accumulating in the water suction pipe 35, and avoiding blockage of the water suction pipe 35.

[0071] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat pump water heater, comprising a water heater housing (1) and a display (2) mounted on the outer wall of the water heater housing (1), wherein a water tank (4) is arranged in the water heater housing (1), characterized in that: Also includes: A filter assembly and a heating assembly are disposed in the water tank (4), the filter assembly and the heating assembly are fixedly connected, the filter assembly is located above the heating assembly, and the filter assembly is close to the water inlet at the top of the water tank (4); A preheating box (8) is arranged in the water tank (4), wherein a pretreatment component for extending the water storage time is arranged in the preheating box (8).

2. A heat pump water heater according to claim 1, characterized in that: A radiator (3) is arranged above the water tank (4) in the water heater housing (1); the radiator (3) and the water tank (4) are connected via a water pump (5); one side of the radiator (3) is connected to an expander (6); and one side of the expander (6) is connected to an evaporator (7).

3. A heat pump water heater according to claim 2, characterized in that: The filter assembly comprises a filter screen (25) which is floatingly arranged in a water tank (4); a mounting plate (26) is arranged at the bottom of the filter screen (25); the mounting plate (26) is slidably connected to the inner wall of the water tank (4); a fixing plate (28) is fixedly installed on the inner wall of the water tank (4); and a spring (37) is connected between the mounting plate (26) and the fixing plate (28).

4. A heat pump water heater according to claim 3, characterized in that: The heating assembly comprises a second heating rod (27) and a first heating rod (19) connected to the second heating rod (27); both ends of the second heating rod (27) are connected to connecting rods (31); the connecting rods (31) penetrate and are slidably connected in a fixing plate (28); and the top end of the connecting rod (31) is fixedly connected to the lower surface of the mounting plate (26); a connecting sleeve (18) is fixedly mounted on the surface of the first heating rod (19); and the connecting sleeve (18) is fixedly connected to the top of the filter screen (25).

5. A heat pump water heater according to claim 4, characterized in that: The pretreatment component comprises a spiral tube (22), the top end of the spiral tube (22) is connected to a water inlet bucket (24), the bottom end of the spiral tube (22) is fixedly connected to a flow guide tube (32), the bottom end of the flow guide tube (32) extends to the inside of a water tank (4), and the outer wall of the spiral tube (22) is provided with a wing plate (23).

6. A heat pump water heater according to claim 5, characterized in that: The outside of the spring (37) is connected to an air bag (29) located between the mounting plate (26) and the fixing plate (28); a shunt pipe (34) is connected between the air bags (29); a connecting pipe (33) is connected between the shunt pipes (34); the guide pipe (32) and the connecting pipe (33) are connected; and a drain valve (30) is connected to the bottom of the air bag (29).

7. A heat pump water heater according to claim 5, characterized in that: The top of the preheating box (8) is fixedly connected to a water inlet pipe (9); the top of the first heating rod (19) extends through the preheating box (8); a turbine (21) is fixedly mounted on the top of the first heating rod (19); the turbine (21) is arranged directly below a water outlet of the water inlet pipe (9); a paddle (20) is fixedly mounted on the outer wall of the first heating rod (19); the paddle (20) and the wing plate (23) are arranged in a close fit in a vertical direction.

8. A heat pump water heater according to claim 7, characterized in that: An overflow pipe (10) is fixedly connected to the top of one side of the preheating box (8), a rotating shaft (11) is rotatably connected between the outer wall of the preheating box (8) and the inner wall of the water tank (4), an impeller (12) is fixedly mounted on the surface of the rotating shaft (11), and a water outlet of the overflow pipe (10) is located directly above the impeller (12).

9. A heat pump water heater according to claim 8, characterized in that: A cam (13) is fixedly mounted on one end of the rotating shaft (11), a wheel groove (14) is formed in the cam (13), a connecting frame (17) is fixedly connected to one side of the connecting sleeve (18), a driving rod (15) is fixedly connected to one side of the connecting frame (17), a connecting block (16) is fixedly mounted on the top end of the driving rod (15), and the connecting block (16) is slidably engaged in the wheel groove (14).

10. The heat pump water heater according to claim 9, characterized in that: The water pump (5) is connected to a water pumping pipe (35), one end of which extends into the water tank (4); a dredging rod (36) is fixedly mounted on one side of the connecting frame (17); the dredging rod (36) is arranged in a floating manner in the water pumping pipe (35) following the connecting frame (17).

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