Heat pump air conditioning unit with multi-stage air purification function

Abstract

The application discloses a heat pump air conditioning unit with multi-stage air purification function and relates to the technical field of heat pump air conditioning units. The heat pump air conditioning unit comprises an outer casing, an electric air outlet fan, a protective net, a flow expansion shell, a condenser, multi-stage filters and a compressor. A plurality of purification sheets of the application form a circular planar filter layer. Dust contained in air is filtered by filter screens on the purification sheets. After being filtered, the air does not have a large amount of dust adhering to the condenser when being blown through the condenser, so that the condenser remains clean during long-time operation and the heat dissipation efficiency is not reduced due to dust adhesion. The flow expansion shell is arranged to diffuse the air filtered by the multi-stage filters during room temperature adjustment, so that the entire condenser is cooled. The dispersed back-blowing air flow can be gathered and concentrated to blow towards the purification sheets during self-cleaning. The control system performs self-cleaning for a corresponding time length according to the filter screen blockage condition, so that the self-cleaning intensity is adaptively adjusted according to the blockage degree.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat pump air conditioning units, and particularly relates to a heat pump air conditioning unit with multi-stage air purification function. BACKGROUND

[0002] The double-working-condition solar heat pump air conditioning unit combines solar photovoltaic and heat pump technologies, converts sunlight into electric energy through the installed photovoltaic components, preferentially supplies power to key components such as heat pump compressors, water pumps and fans, realizes almost zero or low grid power consumption for refrigeration operation in summer, also drives the heat pump to heat in winter, and supplements power from the grid when the light is insufficient, to ensure stable operation of the system throughout the year. Photovoltaic power generation can significantly reduce the dependence of traditional air conditioners on external power grids, and greatly reduce the power consumption per unit of refrigeration or heating.

[0003] However, in use, the existing heat pump air conditioning unit is easy to be contaminated with dust for a long time, and once the filter screen of the outdoor unit is blocked, the heat dissipation efficiency of the outdoor unit will be seriously affected, resulting in a substantial increase in energy consumption and overloading of the compressor. Although the existing technology blows dust through the outdoor fan, it lacks effective detection means for the degree of blockage of the filter screen, and the wind power of the fan is relatively dispersed, so the cleaning effect is limited. SUMMARY

[0004] The purpose of the present application is to provide a heat pump air conditioning unit with multi-stage air purification function to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a heat pump air conditioning unit with multi-stage air purification function, comprising an outdoor unit shell, an electric fan is rotatably installed in the outdoor unit shell, a protective screen is installed on one side of the outdoor unit shell, and a flow expansion shell is installed on the other side of the outdoor unit shell, a multi-stage filter is installed on the flow expansion shell, a condenser is installed in the outdoor unit shell, a compressor is installed in the outdoor unit shell, the compressor and the condenser are connected through a pipeline, and an air conditioner indoor unit is connected to the condenser through a pipeline.

[0006] The heat pump air conditioning unit is connected with a solar panel, the solar panel is used to convert solar energy into electric energy, and the converted electric energy is provided to the heat pump air conditioning unit to meet the working requirements of the double-working-condition. A control system is arranged in the heat pump air conditioning unit, and the control system is used to control the entire heat pump air conditioning unit. An evaporator is arranged in the air conditioner indoor unit, the evaporator and the condenser are connected through a pipeline, and the evaporator is connected to the compressor through a pipeline. An expansion end and a gathering end are arranged on the flow expansion shell, the expansion end is connected to the outdoor unit shell, and the multi-stage filter is connected to the gathering end.

[0007] When working, the compressor compresses low-pressure gaseous refrigerant into high-temperature and high-pressure gas, which is sent to the condenser to be condensed into high-pressure liquid after heat release, and then enters the evaporator after pressure reduction by the expansion valve, absorbs heat in the evaporator to evaporate into gas, and returns to the compressor for continuous circulation. When refrigerating, the evaporator absorbs heat indoors and the condenser releases heat outdoors; when heating, the flow direction of the refrigerant is changed through the four-way valve, the evaporator absorbs heat outdoors and the condenser releases heat indoors, so as to realize room temperature regulation.

[0008] The electric fan is used to drive the air flow in the outer casing, so that the air enters the diffuser shell through the multi-stage filter, and then passes through the condenser. After the air takes away the heat of the condenser, it is discharged through the protective net to realize the function of cooling the condenser.

[0009] Further, the multi-stage filter includes an outer cylinder and a connecting cylinder, the outer cylinder is installed on the diffuser shell, a self-cleaning grid is rotatably installed in the outer cylinder, the connecting cylinder is rotatably connected with the self-cleaning grid, a plurality of purification pieces are rotatably installed on the connecting cylinder, and a balance signal device is slidably installed in the connecting cylinder. The balance signal device is in engagement and transmission with the purification piece, one end of the purification piece is rotatably connected with the outer cylinder, and a return spring is installed between the balance signal device and the connecting cylinder.

[0010] Further, the self-cleaning grid includes a plurality of grid bars, a tooth ring and an adjusting motor, the tooth ring is rotatably connected with the outer cylinder, one end of the grid bar is connected with a rotating end shell, the rotating end shell is rotatably connected with the connecting cylinder, the other end of the grid bar is provided with the tooth ring, the tooth ring is rotatably connected with the outer cylinder, the adjusting motor is installed in the outer cylinder, a gear is installed on an output shaft of the adjusting motor, the gear is rotatably connected with the outer cylinder, and the gear is in engagement and transmission with the tooth ring.

[0011] The number of grid bars can be adjusted according to the use requirement, and annular grids with gradually increasing diameters can also be added according to the protection requirement, the annular grids are connected with the grid bars and concentric with the rotating end shell. The grid bars separate large-volume impurities such as leaves and plastics floating in the air, and the grid bars are combined with the purification pieces to achieve the purpose of multi-stage purification of the air.

[0012] Further, a flexible cleaning strip is installed on the grid bar, and the flexible cleaning strip is in close contact with the purification piece.

[0013] The flexible cleaning strip is provided with flexible bristles.

[0014] After the control system detects that the filter screen is blocked, the room temperature regulation work of the entire heat pump air conditioning unit is first turned off, and the electric exhaust fan is turned off. After the electric exhaust fan is turned off, the air pressure difference generated inside and outside the outer shell disappears, the purification sheet returns to the initial state, and a plurality of purification sheets form a circular plane filter layer. Then the electric exhaust fan is turned on in reverse, the electric exhaust fan drives the air to flow in reverse, so that the air enters the outer shell through the protective screen, and then enters the flow expansion shell. The flow expansion shell gathers the dispersed airflow and blows it towards the purification sheet. Since the reset spring is in a contracted state in the initial state, and the reset spring and the entire balance signal are retracted at one end of the connecting cylinder, the connecting column cannot move in reverse, the connecting column locks the rotating rod through the gear slot, so that the fan-shaped plate cannot drive the rotating rod to deflect in reverse under the impact of the reverse airflow. A plurality of purification sheets maintain a circular plane posture in the airflow. At the same time, the control system opens the self-cleaning grid.

[0015] The control system starts the adjusting motor, the output shaft of the adjusting motor drives the gear to rotate, the gear drives the gear ring to rotate, the gear ring drives the grid strip and the rotating end shell to rotate, and the flexible cleaning strip on the grid strip scrapes the filter screen. At the same time, when the flexible cleaning strip rotates to the rotating rod, the cleaning teeth on the rotating rod remove the dust attached to the flexible cleaning strip. Then, the air flow generated by the reverse rotation of the electric exhaust fan blows the dust cleaned from the filter screen and the flexible cleaning strip out of the outer cylinder, thereby achieving the purpose of preventing blockage and self-cleaning of the multi-stage filter. The control system performs self-cleaning for a corresponding duration according to the blockage of the filter screen, thereby achieving the purpose of self-adaptive adjustment of self-cleaning intensity according to the degree of blockage.

[0016] Further, the purification sheet includes a rotating rod, a fan-shaped plate is installed on the rotating rod, a filter screen is arranged on the fan-shaped plate, one end of the rotating rod is rotatably connected with the outer cylinder, and the other end of the rotating rod is engaged with the balance signal for transmission. The rotating rod is rotatably connected with the connecting cylinder.

[0017] In the initial state, the reset spring is in a contracted state, the reset spring drives the entire balance signal to retract at one end of the connecting cylinder, the purification sheet does not deflect, the plane of the fan-shaped plate is parallel to the annular cross section of the gear ring, and a plurality of purification sheets form a circular plane filter layer. At this time, the conversion spring in the balance signal is in a natural elongated state, the sliding plug is located at one end of the sliding cavity away from the piezoelectric ceramic, the conversion rod extends out of the sliding cavity for the longest distance, and the ball is in close contact with the inner wall of the rotating end shell.

[0018] When the filter screen is clean, the dust contained in the air passing through the filter screen is filtered by the filter screen, the filtered air enters the flow expansion shell, and diffuses along the expanding end of the flow expansion shell, thereby cooling the entire condenser. When the filtered air blows through the condenser, there is no dust attached to the condenser, so that the condenser remains clean for a long time, avoids the reduction of heat dissipation efficiency caused by dust attachment, and improves the effective working time.

[0019] Further, the rotating rod is provided with a transmission gear at one end, and the rotating rod is engaged with the equalizer through the transmission gear. The rotating rod is provided with a plurality of cleaning gears.

[0020] Further, the equalizer is provided with a plurality of connecting columns, and sliding rings are installed at both ends of the connecting columns. A reset spring is installed between the sliding ring and the connecting cylinder. A signal conversion assembly is installed in the connecting column, and the signal conversion assembly penetrates the ring moving ring. The connecting column and the connecting cylinder are slidingly connected, and the ring moving ring and the connecting cylinder are slidingly connected. The connecting column is provided with a gear slot, and the connecting column is engaged with the transmission gear through the gear slot.

[0021] When the filter screen is blocked by dust after long-term operation, the air pressure difference between the inside and outside of the outer shell increases continuously due to the fact that the air cannot pass through the filter screen smoothly, and the fan-shaped plate drives the rotating rod to deflect into the outer shell. The rotating rod drives the connecting column to deflect through the transmission gear. Since the plurality of connecting columns are connected to form a whole through the sliding ring, the single rotating rod deflects to drive the corresponding connecting column to deflect, and the plurality of connecting columns are connected through the sliding ring to move synchronously. The plurality of connecting columns drive the plurality of purification pieces to deflect at the same angle at the same time, thereby realizing the equal deflection control of the purification pieces.

[0022] Through the equal deflection control, when the filter screen is blocked, the purification pieces can deflect at the same angle to open, so that the air can enter through the gap of the purification pieces to continue to uniformly cool the condenser. When the filter screen is blocked, the equal deflection control ensures the uniformity of heat dissipation and prevents local overheating.

[0023] Further, the signal conversion assembly comprises a conversion rod, and the conversion rod is provided with a rolling end at one end. A ball is rotatably installed on the rolling end. The conversion rod is slidingly connected with the connecting column and the sliding ring. A sliding plug is installed at one end of the conversion rod. A sliding cavity is provided in the connecting column. The sliding plug is slidingly arranged in the sliding cavity. A piezoelectric ceramic is installed in the sliding cavity. A partition plate is slidingly installed in the sliding cavity. A conversion spring is installed between the partition plate and the sliding plug. The ball abuts against the inner wall of the rotating end shell.

[0024] The design of the ball enables the ball to abut against the inner wall of the rotating end shell without affecting the rotation of the rotating end shell.

[0025] The connecting column moves to drive the signal conversion assembly in it to be close to the rotating end shell, the ball drives the conversion rod to slide in the connecting column sliding cavity through the rolling end, the conversion rod drives the sliding plug to extrude the conversion spring, the conversion spring compresses to transmit the pressure to the partition plate, the partition plate further transmits the pressure to the piezoelectric ceramic, the piezoelectric ceramic generates an electric signal after being pressed, the more serious the filter screen blockage is, the greater the deflection of the purification sheet is under the same condition, the greater the displacement of the equalizing annunciator is, and the stronger the electric signal generated by the piezoelectric ceramic is, and the control system judges the blockage degree of the filter screen according to the strength of the electric signal.

[0026] Compared with the prior art, the beneficial effects of the present application are:

[0027] 1. The grid bars are rotated by the adjusting motor, the flexible cleaning strips are scraped on the filter screen, meanwhile, the dust adhered to the flexible cleaning strips is scraped by the cleaning teeth on the rotating rod, and the dust cleaned on the filter screen and the flexible cleaning strips is blown out of the outer cylinder by the airflow generated by the reverse rotation of the electric air fan, so that the purpose of preventing blockage and self-cleaning of the multi-stage filter is achieved. The grid bars are combined with the purification sheets to achieve the purpose of multi-stage air purification.

[0028] 2. A plurality of purification sheets form a circular planar filter layer, the dust contained in the air is filtered by the filter screen on the purification sheet, and after the filtered air blows through the condenser, a large amount of dust is no longer adhered to the condenser, so that the condenser remains clean during long-time operation, avoids the reduction of heat dissipation efficiency caused by dust adhesion, and improves the effective working time. The setting of the flow expansion shell can diffuse the air filtered by the multi-stage filter during room temperature adjustment, so as to cool the entire condenser; or the dispersed back-blowing airflow can be gathered and concentrated to blow towards the purification sheet during self-cleaning.

[0029] 3. The purification sheet adopts a deflectable structure of fan-shaped plate plus rotating rod, when the filter screen is blocked by dust, the fan-shaped plate drives the rotating rod to deflect towards the outer shell, the purification sheet can be opened by the same angle deflection, so that the air can enter through the gap of the purification sheet to continue cooling the condenser, and through the balanced deflection control, the uniformity of heat dissipation when the filter screen is blocked is ensured, and local overheating is prevented.

[0030] 4. The deflection of the purification sheet drives the signal conversion assembly to be close to the rotating end shell, the ball drives the conversion rod to slide in the connecting column sliding cavity, the conversion rod drives the sliding plug to extrude the conversion spring, and finally the pressure is transmitted to the piezoelectric ceramic to generate an electric signal, so as to convert the deflection angle of the purification sheet into an electric signal; the control system judges the blockage degree of the filter screen according to the strength of the electric signal, so as to achieve the purpose of detecting the blockage degree of the filter screen. The control system performs self-cleaning for a corresponding time according to the blockage of the filter screen, so as to achieve the purpose of self-adaptive adjustment of the self-cleaning intensity according to the blockage degree. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a whole perspective view of the heat pump air conditioning unit of the present application;

[0032] Figure 2 is a perspective view of the heat pump air conditioning unit of the present application Figure 1 ;

[0033] Figure 3 is a perspective view of the heat pump air conditioning unit of the present application Figure 2 ;

[0034] Figure 4 is a perspective view of the multi-stage filter of the present application Figure 1 ;

[0035] Figure 2 is a perspective view of the multi-stage filter of the present application Figure 6 ;

[0036] Figure 7 is a perspective view of the self-cleaning grid of the present application;

[0037] Figure 6 is a partial enlarged view of the A area in the Figure 8 of the present application;

[0038] Figure 3 is a perspective view of the multi-stage filter of the present application Figure 9 ;

[0039] Figure 10 is a perspective view of the purification sheet of the present application;

[0040] Figure 9 is a partial enlarged view of the B area in the Figure 11 of the present application;

[0041] Figure 12 is a perspective view of the equalization signaler of the present application;

[0042] Figures 1-12 is a perspective view of the signal conversion assembly of the present application.

[0043] In the diagram: 1. Outer casing; 2. Electric exhaust fan; 3. Protective net; 4. Flow diffuser; 5. Condenser; 6. Multi-stage filter; 7. Compressor; 61. Outer cylinder; 62. Self-cleaning grille; 63. Purification plate; 64. Connecting cylinder; 65. Equalization signal device; 66. Return spring; 621. Gear; 622. Adjustment motor; 623. Gear ring; 624. Grille bar; 625. Rotating end shell; 6241. Flexible cleaning... Cleaning strip; 631, rotating rod; 632, sector plate; 6321, filter screen; 6311, transmission gear; 6312, cleaning gear; 651, sliding ring; 652, connecting post; 6521, tooth groove; 653, signal conversion assembly; 6531, conversion rod; 6532, rolling end; 6533, ball bearing; 6534, sliding plug; 6535, conversion spring; 6536, partition plate; 6537, piezoelectric ceramic. Detailed Implementation

[0044] 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.

[0045] like ​ As shown, the present invention provides a heat pump air conditioning unit with multi-stage air purification function: including an outdoor unit casing 1, an electric exhaust fan 2 rotatably installed inside the outdoor unit casing 1, a protective net 3 installed on one side of the outdoor unit casing 1, an air diffuser shell 4 installed on the other side of the outdoor unit casing 1, a multi-stage filter 6 installed on the air diffuser shell 4, a condenser 5 installed inside the outdoor unit casing 1, a compressor 7 installed inside the outdoor unit casing 1, the compressor 7 and the condenser 5 connected by a pipe, and the condenser 5 connected to the indoor air conditioning unit by a pipe.

[0046] The heat pump air conditioning unit is equipped with an external solar panel. This panel converts solar energy into electrical energy, which is then supplied to the heat pump air conditioning unit to meet its dual-mode operating requirements. The heat pump air conditioning unit has an internal control system that manages the entire unit. The indoor unit contains an evaporator, which is connected to the condenser 5 via pipes. The evaporator is also connected to the compressor 7 via pipes. The diffuser shell 4 has an expanding end and a converging end. The expanding end connects to the outdoor unit casing 1, and the multi-stage filter 6 connects to the converging end.

[0047] In operation, the compressor 7 compresses low-pressure gaseous refrigerant into high-temperature and high-pressure gas, which is sent to the condenser 5 to be condensed into high-pressure liquid by releasing heat. After the pressure is reduced by the expansion valve, the liquid enters the evaporator to be evaporated into gas by absorbing heat, and then returns to the compressor 7 for continuous circulation. When cooling, the evaporator absorbs heat indoors and the condenser 5 releases heat outdoors; when heating, the flow direction of the refrigerant is changed by the four-way valve, the evaporator absorbs heat outdoors and the condenser 5 releases heat indoors, thereby achieving room temperature regulation.

[0048] The electric blower fan 2 is used to drive the air flow in the outer casing 1, so that the air enters the diffuser shell 4 through the multi-stage filter 6, and then passes through the condenser 5. After the air takes away the heat of the condenser 5, it is discharged through the protective net 3, thereby achieving the function of cooling the condenser 5.

[0049] The multi-stage filter 6 includes an outer cylinder 61 and a connecting cylinder 64. The outer cylinder 61 is installed on the diffuser shell 4, and a self-cleaning grid 62 is rotatably installed in the outer cylinder 61. The connecting cylinder 64 is rotatably connected with the self-cleaning grid 62, and a plurality of purification pieces 63 are rotatably installed on the connecting cylinder 64. An equalizer 65 is slidably installed in the connecting cylinder 64, and the equalizer 65 is in meshing transmission with the purification pieces 63. One end of the purification piece 63 is rotatably connected with the outer cylinder 61, and a return spring 66 is installed between the equalizer 65 and the connecting cylinder 64.

[0050] The self-cleaning grid 62 includes a plurality of grid bars 624, a tooth ring 623, and an adjusting motor 622. The tooth ring 623 is rotatably connected with the outer cylinder 61, and one end of the grid bar 624 is connected with a rotating end shell 625. The rotating end shell 625 is rotatably connected with the connecting cylinder 64, and the other end of the grid bar 624 is installed with the tooth ring 623. The tooth ring 623 is rotatably connected with the outer cylinder 61, and the adjusting motor 622 is installed in the outer cylinder 61. A gear 621 is installed on the output shaft of the adjusting motor 622, and the gear 621 is rotatably connected with the outer cylinder 61. The gear 621 is in meshing transmission with the tooth ring 623.

[0051] The number of the grid bars 624 can be adjusted according to the use requirements, and annular grids with gradually increasing diameters can also be added according to the protection needs. The annular grids are connected with the grid bars 624 and are concentric with the rotating end shell 625. The grid bars 624 separate large-volume impurities such as leaves and plastics floating in the air, and the grid bars 624 are combined with the purification pieces 63 to achieve the purpose of multi-stage purification of the air.

[0052] The grid bar 624 is installed with a flexible cleaning strip 6241, and the flexible cleaning strip 6241 is in close contact with the purification piece 63. The flexible cleaning strip 6241 is provided with flexible bristles.

[0053] The purification sheet 63 comprises a rotating rod 631, a sector plate 632 is installed on the rotating rod 631, a filter screen 6321 is arranged on the sector plate 632, one end of the rotating rod 631 is rotationally connected with the outer cylinder 61, the other end of the rotating rod 631 is engaged with the transmission of the equalizing signal device 65, and the rotating rod 631 is rotationally connected with the connecting cylinder 64.

[0054] In the initial state, the reset spring 66 is in the retracted state, the reset spring 66 drives the entire equalizing signal device 65 to retract at one end of the connecting cylinder 64, the purification sheet 63 does not produce deflection, the plane of the sector plate 632 is parallel to the annular section of the tooth ring 623, and the plurality of purification sheets 63 form a circular plane filter layer, at this time, the conversion spring 6535 in the equalizing signal device 65 is in a natural elongated state, the sliding plug 6534 is located at one end of the sliding cavity away from the piezoelectric ceramic 6537, the conversion rod 6531 is the longest in the sliding cavity, and the ball 6533 is in close contact with the inner wall of the rotating end shell 625.

[0055] One end of the rotating rod 631 is provided with a transmission tooth 6311, the rotating rod 631 is engaged with the transmission of the equalizing signal device 65 through the transmission tooth 6311, and a plurality of cleaning teeth 6312 are arranged on the rotating rod 631.

[0056] The equalizing signal device 65 comprises a plurality of connecting columns 652, sliding rings 651 are installed at two ends of the connecting columns 652, the reset spring 66 is arranged between the sliding rings 651 and the connecting cylinder 64, a signal conversion assembly 653 is arranged in the connecting column 652, the signal conversion assembly 653 penetrates through the ring moving ring, the connecting column 652 is slidably connected with the connecting cylinder 64, the ring moving ring is slidably connected with the connecting cylinder 64, a tooth groove 6521 is arranged on the connecting column 652, and the connecting column 652 is engaged with the transmission of the transmission tooth 6311 through the tooth groove 6521.

[0057] The signal conversion assembly 653 comprises a conversion rod 6531, one end of the conversion rod 6531 is provided with a rolling end 6532, the rolling end 6532 is rotationally installed with a ball 6533, the conversion rod 6531 is slidably connected with the connecting column 652 and the sliding ring 651, one end of the conversion rod 6531 is installed with a sliding plug 6534, a sliding cavity is arranged in the connecting column 652, the sliding plug 6534 is slidably arranged in the sliding cavity, a piezoelectric ceramic 6537 is arranged in the sliding cavity, a partition plate 6536 is slidably arranged in the sliding cavity, a conversion spring 6535 is arranged between the sliding plug 6534 and the partition plate 6536, and the ball 6533 is in close contact with the inner wall of the rotating end shell 625. The design of the ball 6533 enables the ball 6533 to be in close contact with the inner wall of the rotating end shell 625 while not affecting the rotation of the rotating end shell 625.

[0058] The working principle of the present application is as follows: when the filter screen 6321 is clean, the dust contained in the air passing through the filter screen 6321 is filtered by the filter screen 6321, and the filtered air enters the flow expansion shell 4 and diffuses along the expanding end of the flow expansion shell 4, thereby cooling the entire condenser 5. When the filtered air blows through the condenser 5, there is no dust adhering to the condenser 5, so that the condenser 5 remains clean for a long time, avoids the reduction of heat dissipation efficiency caused by dust adhesion, and improves the effective working time.

[0059] When the filter screen 6321 is clogged by dust after a long time of operation, the air inside the outer casing 1 is continuously blown out by the electric blower fan 2, and the air pressure difference between the inside and outside of the outer casing 1 continuously increases. When the air pressure difference reaches a critical value, the fan-shaped plate 632 drives the rotating rod 631 to deflect outwardly into the outer casing 1. The rotating rod 631 drives the connecting column 652 to deflect through the transmission gear 6311. Since the connecting columns 652 are connected to form a whole through the sliding ring 651, the single rotating rod 631 drives the corresponding connecting columns 652 to deflect, and the connecting columns 652 are connected through the sliding ring 651, so that the connecting columns 652 move synchronously. The connecting columns 652 also drive the plurality of purification fins 63 to deflect by the same angle at the same time, thereby achieving balanced deflection control of the purification fins 63.

[0060] Through balanced deflection control, when the filter screen 6321 is clogged, the purification fins 63 can deflect by the same angle to open, so that air can enter through the gap of the purification fins 63 to continue to uniformly cool the condenser 5. This avoids the condenser 5 and other components from being damaged due to delayed heat dissipation after the filter screen 6321 is clogged. Balanced deflection control ensures the uniformity of heat dissipation when the filter screen 6321 is clogged, preventing local overheating.

[0061] After the connecting column 652 moves, the signal conversion assembly 653 inside the connecting column 652 approaches the rotating end shell 625. The ball 6533 drives the conversion rod 6531 to slide in the sliding cavity of the connecting column 652 through the rolling end 6532. The conversion rod 6531 drives the sliding plug 6534 to press the conversion spring 6535. After the conversion spring 6535 is compressed, it transmits the pressure to the partition plate 6536, which further transmits the pressure to the piezoelectric ceramic 6537. After the piezoelectric ceramic 6537 is pressed, an electric signal is generated. The more serious the clogging of the filter screen 6321, the greater the deflection of the purification fins 63 under the same conditions, and the greater the displacement of the balanced signal device 65. Furthermore, the stronger the electric signal generated by the piezoelectric ceramic 6537. The control system determines the degree of clogging of the filter screen 6321 according to the strength of the electric signal.

[0062] After the control system detects that the filter screen 6321 is blocked, the room temperature regulation work of the entire heat pump air conditioning unit is first closed, the electric exhaust fan 2 is closed, the air pressure difference generated inside and outside the outer casing 1 is dissipated, the purification sheet 63 returns to the initial state, and a plurality of purification sheets 63 form a circular plane filter layer. Then the electric exhaust fan 2 is opened in reverse, the electric exhaust fan 2 drives the air to flow in reverse, so that the air enters the outer casing 1 from the protective screen 3, then enters the flow expansion shell 4 from the outer casing 1, the flow expansion shell 4 converges the dispersed airflow and blows it towards the purification sheet 63. Since the reset spring 66 is in a contracted state in the initial state, and the reset spring 66 and the entire balance signal 65 are contracted at one end of the connecting cylinder 64, the connecting column 652 cannot move in reverse, the connecting column 652 locks the rotating rod 631 through the tooth groove 6521, so that the fan-shaped plate 632 cannot drive the rotating rod 631 to deflect in reverse under the impact of the reverse airflow, and a plurality of purification sheets 63 maintain a circular plane posture in the airflow. At the same time, the control system opens the self-cleaning grid 62.

[0063] The control system starts the adjusting motor 622, the output shaft of the adjusting motor 622 drives the gear 621 to rotate, the gear 621 drives the gear ring 623 to rotate, the gear ring 623 drives the grid strip 624 and the rotating end shell 625 to rotate, the flexible cleaning strip 6241 on the grid strip 624 scrapes the filter screen 6321, and at the same time, when the flexible cleaning strip 6241 rotates to the rotating rod 631, the cleaning teeth 6312 on the rotating rod 631 scrape off the dust attached to the flexible cleaning strip 6241, and then the airflow generated by the reverse rotation of the electric exhaust fan 2 blows the dust cleaned from the filter screen 6321 and the flexible cleaning strip 6241 out of the outer cylinder 61, so as to achieve the purpose of preventing blockage and self-cleaning of the multi-stage filter 6. The control system performs self-cleaning for a corresponding time according to the blockage of the filter screen 6321, so as to achieve the purpose of self-adaptive adjustment of self-cleaning intensity according to the degree of blockage.

[0064] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A heat pump air conditioning unit with multi-stage air purification function, characterized in that: The heat pump air conditioning unit includes an outdoor unit casing (1), an electric exhaust fan (2) is rotatably installed inside the outdoor unit casing (1), a protective net (3) is installed on one side of the outdoor unit casing (1), a flow diffuser shell (4) is installed on the other side of the outdoor unit casing (1), a multi-stage filter (6) is installed on the flow diffuser shell (4), a condenser (5) is installed inside the outdoor unit casing (1), a compressor (7) is installed inside the outdoor unit casing (1), the compressor (7) and the condenser (5) are connected by a pipe, and the condenser (5) is connected to the indoor unit of the air conditioner by a pipe; The multi-stage filter (6) includes an outer cylinder (61) and a connecting cylinder (64). The outer cylinder (61) is mounted on the diffuser shell (4). A self-cleaning grid (62) is rotatably installed inside the outer cylinder (61). The connecting cylinder (64) is rotatably connected to the self-cleaning grid (62). A plurality of purification plates (63) are rotatably installed on the connecting cylinder (64). An equalization signal device (65) is slidably installed inside the connecting cylinder (64). The equalization signal device (65) meshes with the purification plates (63). One end of the purification plate (63) is rotatably connected to the outer cylinder (61). A return spring (66) is installed between the equalization signal device (65) and the connecting cylinder (64). The purification plate (63) includes a rotating rod (631), a fan-shaped plate (632) is installed on the rotating rod (631), a filter screen (6321) is provided on the fan-shaped plate (632), one end of the rotating rod (631) is rotatably connected to the outer cylinder (61), the other end of the rotating rod (631) is engaged with the equalization signal device (65) for transmission, and the rotating rod (631) is rotatably connected to the connecting cylinder (64); One end of the rotating rod (631) is provided with a transmission tooth (6311), and the rotating rod (631) is engaged with the equalization signal device (65) through the transmission tooth (6311). The rotating rod (631) is provided with a number of cleaning teeth (6312). The equalizer (65) includes several connecting posts (652), with sliding rings (651) installed at both ends of the connecting posts (652). A return spring (66) is installed between the sliding rings (651) and the connecting cylinder (64). A signal conversion component (653) is installed inside the connecting post (652). The signal conversion component (653) passes through the circumferential ring. The connecting post (652) is slidably connected to the connecting cylinder (64). The circumferential ring is slidably connected to the connecting cylinder (64). The connecting post (652) is provided with a toothed groove (6521). The connecting post (652) is driven by meshing with the transmission tooth (6311) through the toothed groove (6521). The signal conversion assembly (653) includes a conversion rod (6531), one end of which is provided with a rolling end (6532), and a ball bearing (6533) is rotatably mounted on the rolling end (6532). The conversion rod (6531) is slidably connected to the connecting post (652) and the sliding ring (651). A sliding plug (6534) is installed at one end of the conversion rod (6531). A sliding cavity is provided inside the connecting post (652). The sliding plug (6534) is slidably disposed in the sliding cavity. A piezoelectric ceramic (6537) is installed in the sliding cavity. A partition (6536) is slidably installed in the sliding cavity. A conversion spring (6535) is installed between the partition (6536) and the sliding plug (6534). The ball bearing (6533) is in close contact with the inner wall of the rotating end shell (625).

2. A heat pump air conditioning unit with multi-stage air purification function according to claim 1, characterized in that: The self-cleaning grille (62) includes several grille bars (624), a toothed ring (623), and an adjusting motor (622). The toothed ring (623) is rotatably connected to the outer cylinder (61). One end of the grille bar (624) is connected to a rotating end shell (625), which is rotatably connected to the connecting cylinder (64). The other end of the grille bar (624) is equipped with a toothed ring (623), which is rotatably connected to the outer cylinder (61). The adjusting motor (622) is installed inside the outer cylinder (61). A gear (621) is installed on the output shaft of the adjusting motor (622), which is rotatably connected to the outer cylinder (61). The gear (621) meshes with the toothed ring (623) for transmission.

3. A heat pump air conditioning unit with multi-stage air purification function according to claim 2, characterized in that: A flexible cleaning strip (6241) is installed on the grille bar (624), and the flexible cleaning strip (6241) is in close contact with the purification sheet (63).

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