Air conditioner self-cleaning system and air conditioner self-cleaning method

Abstract

The present invention relates to an air conditioner self-cleaning system and an air conditioner self-cleaning method, comprising: a refrigerant circulation system, the refrigerant circulation system comprising a compressor, a first heat exchanger and a second heat exchanger, the compressor, the first heat exchanger and the second heat exchanger are all connected to the refrigerant passage to form a refrigerant circulation loop; a variable frequency switch device, the variable frequency switch device is arranged on the refrigerant passage, and is used to control the on-off frequency of the refrigerant passage. The refrigerant passage is controlled by the variable frequency switch device to continuously switch between the on and off states at a certain frequency to form a pressure shock wave, and the pressure shock wave is transmitted to the first heat exchanger and / or the second heat exchanger, so that the first heat exchanger and / or the second heat exchanger vibrate, dust falls off, and the purpose of self-cleaning is achieved. The structure is simple and the implementation cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioner cleaning, and in particular to an air conditioner self-cleaning system and an air conditioner self-cleaning method. Background Art

[0002] After long-term use of the air conditioning system, a lot of dust will accumulate on the heat exchanger, which will affect the heat exchange efficiency of the heat exchanger on the one hand, and on the other hand, it will cause dust to be mixed in the cold or hot air sent into the room. In order to clean the dust on the heat exchanger, a vibration device can be added to the air conditioning system, and the vibration device can be used to transmit vibration to the heat exchanger. The heat exchanger will drop the dust during the vibration process, which serves the purpose of cleaning the heat exchanger. This method requires a separate vibration device as a vibration source, which makes the structure of the air conditioning system complicated. Summary of the invention

[0003] Aiming at the problem of complicated structure of air-conditioning system when realizing self-cleaning of heat exchanger, the present invention proposes an air-conditioning self-cleaning system and an air-conditioning self-cleaning method to simplify the structure.

[0004] An air conditioning self-cleaning system, comprising:

[0005] A refrigerant circulation system, the refrigerant circulation system comprising a compressor, a first heat exchanger and a second heat exchanger, the compressor, the first heat exchanger and the second heat exchanger are all connected to a refrigerant passage to form a refrigerant circulation loop;

[0006] A variable frequency switch device is arranged on the refrigerant passage and is used to control the on-off frequency of the refrigerant passage.

[0007] The above scheme provides an air conditioner self-cleaning system, wherein the variable frequency switch device is directly arranged on the refrigerant passage, and the variable frequency switch device controls the refrigerant passage to switch between the on and off states at a certain frequency, thereby forming a pressure shock wave, which is transmitted to the first heat exchanger and / or the second heat exchanger, thereby causing the first heat exchanger and / or the second heat exchanger to vibrate and drop dust, thereby achieving the purpose of self-cleaning. The structure is simple and the implementation cost is low.

[0008] In one embodiment, the variable frequency switch device is located between the exhaust port of the compressor and the first heat exchanger.

[0009] In one embodiment, the refrigerant circulation system further includes a four-way valve, two water ports of the four-way valve are respectively connected to the air inlet and the exhaust port of the compressor, and the other two water ports of the four-way valve are respectively connected to the first heat exchanger and the second heat exchanger, forming a refrigerant circulation system that can both cool and heat;

[0010] The frequency conversion switch device is located on the refrigerant passage connected between the compressor exhaust port and the four-way valve.

[0011] In one embodiment, the frequency conversion switch device has a pressure chamber, and the pressure chamber has an inlet and an outlet to form a pressure channel, and the pressure channel is connected to the refrigerant channel. The frequency conversion switch device also includes a valve body structure for controlling the switch of the pressure channel. The frequency conversion switch device is provided with a pressure detection device, and the pressure detection device is used to detect the pressure in the pressure chamber. The pressure detection device is electrically connected to the frequency conversion switch device.

[0012] In one embodiment, the variable frequency switch device has a pressure chamber, the pressure chamber has an inlet and an outlet, forming a pressure channel, the pressure channel is connected to the refrigerant channel, the variable frequency switch device also includes a swing unit and a drive unit, the swing unit is arranged in the pressure chamber, and the swing unit includes a sealing plug, the drive unit is used to drive the swing unit to swing in the pressure chamber, so that the sealing plug can switch between the first position and the second position;

[0013] When the sealing plug is located at the first position, the sealing plug blocks and cuts off the pressure channel. When the sealing plug is located at the second position, the pressure channel is open.

[0014] In one embodiment, the cross-sectional shape of the sealing plug is consistent with the outlet shape of the pressure chamber;

[0015] And / or, the outlet of the pressure chamber is oriented in a first direction, a plane perpendicular to the first direction is a reference plane, the sealing plug is disc-shaped, and the sealing plug moves on a plane parallel to the reference plane when swinging.

[0016] In one embodiment, the driving unit includes a high-frequency switching power supply and a coil, the high-frequency switching power supply is electrically connected to the coil, the sealing plug is located within the range of the magnetic field generated when the coil is energized, and when the coil is energized, the sealing plug is subjected to a magnetic attraction force in the magnetic field that switches from the second position to the first position.

[0017] In one of the embodiments, the frequency conversion switch device further includes an elastic reset member, which is disposed between the wall of the pressure chamber and the sealing plug and is used to provide a reset force for the sealing plug to reset from the first position to the second position.

[0018] In one embodiment, the first heat exchanger and / or the second heat exchanger comprises a shell, a heat exchange tube and a fin disposed on the heat exchange tube, the fin is disposed in the shell, and both ends of the heat exchange tube are connected to the refrigerant passage;

[0019] The shell is provided with an air inlet for allowing the air to be heat exchanged to enter, and a cover plate is movably provided at the air inlet;

[0020] The shell is also provided with a dust removal opening, the dust removal opening is provided with a dust removal duct, and the shell is provided with a dust removal fan, the dust removal fan is used to blow the dust dropped from the fins toward the dust removal opening.

[0021] In one embodiment, a vibration detection device is provided on the first heat exchanger and / or the second heat exchanger, and the vibration detection device is electrically connected to the frequency conversion switch device, and the vibration detection device is electrically connected to the compressor.

[0022] An air conditioner self-cleaning method comprises the following steps:

[0023] Controlled by a self-cleaning command, refrigerant is intermittently introduced into a heat exchanger to be cleaned in the air-conditioning system.

[0024] The above scheme provides an air conditioning self-cleaning method. Through a controlled self-cleaning instruction, refrigerant is intermittently introduced into the heat exchanger to be cleaned in the air-conditioning system. In the process of the refrigerant being intermittently introduced into the evaporator, a pressure shock wave is formed. The heat exchanger vibrates under the action of the pressure shock wave, thereby causing dust on the heat exchanger to fall off, thereby achieving the purpose of self-cleaning.

[0025] In one embodiment, the interval frequency of intermittently introducing the refrigerant into the heat exchanger to be cleaned in the air conditioning system is F1;

[0026] Obtaining a value Fmax of the interval frequency F1 when the fin amplitude in the heat exchanger is maximum;

[0027] The refrigerant is intermittently input into the heat exchanger in such a manner that the interval frequency F1 becomes Fmax.

[0028] In one of the embodiments, the air conditioning system is the above-mentioned air conditioning self-cleaning system;

[0029] The step of intermittently introducing refrigerant into the heat exchanger to be cleaned in the air-conditioning system under the control of the self-cleaning instruction comprises the following steps:

[0030] Controlled by the self-cleaning instruction, adjusting the throttling device between the first heat exchanger and the second heat exchanger to a maximum opening;

[0031] The pressure value in the pressure chamber is detected, and the frequency conversion switch device is started when the pressure value in the pressure chamber reaches 80% of the protection value.

[0032] In one embodiment, the air conditioning system is the above-mentioned air conditioning self-cleaning system, and during cooling, the first heat exchanger is a condenser, and the second heat exchanger is an evaporator;

[0033] The method further includes the following steps before intermittently introducing the refrigerant into the heat exchanger to be cleaned in the air conditioning system:

[0034] If the heat exchanger to be cleaned is the first heat exchanger, switching the air conditioning system to a cooling mode;

[0035] If the heat exchanger to be cleaned is the second heat exchanger, the air conditioning system is switched to a heating mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 is a system diagram of the air conditioning self-cleaning system described in this embodiment;

[0039] Figure 2 is a structural schematic diagram of the frequency conversion switch device described in this embodiment;

[0040] Figure 3 This is a schematic diagram of the structure of the first heat exchanger in this embodiment;

[0041] Figure 4 Flow chart of the air conditioner self-cleaning method described in this embodiment.

[0042] Description of reference numerals:

[0043] 10. Air conditioning self-cleaning system; 11. Compressor; 12. First heat exchanger; 121. Shell; 122. Dust removal opening; 123. Cover plate; 124. Air inlet; 13. Second heat exchanger; 14. Four-way valve; 15. Throttling device; 16. Refrigerant passage; 17. Frequency conversion switch device; 171. Pressure chamber; 172. Pressure detection device; 173. Swing unit; 174. Sealing plug; 175. Drive unit; 1751. High-frequency switching power supply; 1752. Coil; 176. Elastic reset member; 18. Vibration detection device. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0045] like Figure 1 As shown, in one embodiment, an air conditioning self-cleaning system 10 is provided, comprising:

[0046] A refrigerant circulation system, the refrigerant circulation system comprising a compressor 11, a first heat exchanger 12 and a second heat exchanger 13, the compressor 11, the first heat exchanger 12 and the second heat exchanger 13 are all connected to a refrigerant passage 16 to form a refrigerant circulation loop;

[0047] The frequency conversion switch device 17 is arranged on the refrigerant passage 16 and is used to control the on-off frequency of the refrigerant passage 16 .

[0048] The above scheme provides an air conditioning self-cleaning system 10, in which the frequency conversion switch device 17 is directly arranged on the refrigerant passage 16, and the frequency conversion switch device 17 controls the refrigerant passage 16 to switch between the on and off states at a certain frequency, thereby forming a pressure shock wave, which is transmitted to the first heat exchanger 12 and / or the second heat exchanger 13, so that the first heat exchanger 12 and / or the second heat exchanger 13 vibrates, dust falls off, and the purpose of self-cleaning is achieved. The structure is simple and the implementation cost is low.

[0049] Specifically, the operating frequency of the variable frequency switch device 17 and the operating frequency of the compressor 11 are adjustable. By changing the operating frequency of the variable frequency switch device 17 and the operating frequency of the compressor 11, the frequency of switching the on and off states of the refrigerant passage 16 can be adjusted.

[0050] In actual use, the fin amplitude in the first heat exchanger 12 and / or the second heat exchanger 13 can be maximized by changing the operating frequency of the variable frequency switch device 17 and the operating frequency of the compressor 11. Then, the operating frequency of the variable frequency switch device 17 and the operating frequency of the compressor 11 when the fin amplitude is the maximum are maintained for a period of time, so that the dust on the fin is shaken off, thereby achieving the purpose of self-cleaning.

[0051] Furthermore, if Figure 1As shown, in one embodiment, the variable frequency switch device 17 is located between the exhaust port of the compressor 11 and the first heat exchanger 12. The variable frequency switch device 17 directly controls the circulation of the refrigerant discharged from the exhaust port of the compressor 11, so that the pressure shock wave can be transmitted downstream to the first heat exchanger 12 and / or the second heat exchanger 13.

[0052] Optionally, in other embodiments, the frequency conversion switch device 17 can also be set at other positions on the refrigerant passage 16, as long as it can control the on-off of the refrigerant passage 16 so that the refrigerant intermittently enters the first heat exchanger 12 and / or the second heat exchanger 13, causing the first heat exchanger 12 and / or the second heat exchanger 13 to vibrate.

[0053] More specifically, if Figure 1 As shown, in one embodiment, the refrigerant circulation system further includes a four-way valve 14, two water ports of the four-way valve 14 are respectively connected to the air inlet and the exhaust port of the compressor 11, and the other two water ports of the four-way valve 14 are respectively connected to the first heat exchanger 12 and the second heat exchanger 13, forming a refrigerant circulation system that can both cool and heat;

[0054] The frequency conversion switch device 17 is located on the refrigerant passage 16 connected between the exhaust port of the compressor 11 and the four-way valve 14 .

[0055] like Figure 1 As shown, assuming that in cooling mode, the first heat exchanger 12 is a condenser and the second heat exchanger 13 is an evaporator. When the first heat exchanger 12 needs to be cleaned, the four-way valve 14 is switched so that the refrigerant circulation system enters the cooling mode, and the refrigerant controlled by the variable frequency switch device 17 first reaches the first heat exchanger 12, and then passes through the second heat exchanger 13. The pressure shock wave in the refrigerant passage 16 brought by the variable frequency switch device 17 mainly affects the first heat exchanger 12, so that the first heat exchanger 12 can fully vibrate to clean dust.

[0056] When the second heat exchanger 13 needs to be cleaned, the four-way valve 14 is switched so that the refrigerant circulation system enters the heating film mode, and the refrigerant controlled by the variable frequency switch device 17 first reaches the second heat exchanger 13, and then passes through the first heat exchanger 12. The pressure shock wave in the refrigerant passage 16 brought by the variable frequency switch device 17 mainly affects the second heat exchanger 13, so that the second heat exchanger 13 can fully vibrate to clean dust.

[0057] In other words, the heat exchanger that needs to be cleaned is obtained according to the user's needs, and then the state of the four-way valve 14 is switched so that when the refrigerant flows, the heat exchanger that the user passes through first after passing through the frequency conversion switch device 17 is the heat exchanger that the user needs to clean.

[0058] Further, in one embodiment, if Figure 1 As shown, the variable frequency switch device 17 has a pressure chamber 171, and the pressure chamber 171 has an inlet and an outlet to form a pressure channel, and the pressure channel is connected to the refrigerant channel. The variable frequency switch device 17 also includes a valve body structure for controlling the switch of the pressure channel. When the refrigerant flows in the refrigerant channel, it enters the pressure chamber 171 from the inlet and flows out of the pressure chamber 171 from the outlet. The valve body structure indirectly controls the on and off state of the refrigerant channel by controlling the switch of the pressure channel.

[0059] Furthermore, if Figure 1 As shown, the variable frequency switch device 17 is provided with a pressure detection device 172 , and the pressure detection device 172 is used to detect the pressure in the pressure chamber 171 . The pressure detection device 172 is electrically connected to the variable frequency switch device 17 .

[0060] Based on the pressure shock wave formed by the on-off mode of the refrigerant channel, the pressure in the refrigerant channel is sometimes high and sometimes low. In order to ensure that the pressure in the refrigerant channel is within a safe range, the pressure detection device 172 is provided on the frequency conversion switch device 17.

[0061] At the start of self-cleaning, the frequency conversion switch device 17 is first closed, and the refrigerant passage 16 is cut off until the pressure value in the pressure chamber 171 reaches 80% of the protection value, and then the frequency conversion switch device 17 is opened. During the self-cleaning process, the throttling device 15 in the refrigerant circulation loop is adjusted to the maximum opening.

[0062] Specifically, in one embodiment, Figure 2 As shown, the variable frequency switch device 17 further includes a swing unit 173 and a driving unit 175, wherein the swing unit 173 is disposed in the pressure chamber 171, and the swing unit 173 includes a sealing plug 174, and the driving unit 175 is used to drive the swing unit 173 to swing in the pressure chamber 171, so that the sealing plug 174 can switch between the first position and the second position;

[0063] When the sealing plug 174 is located at the first position, the sealing plug 174 blocks and cuts off the pressure channel. When the sealing plug 174 is located at the second position, the pressure channel is open.

[0064] It can be understood that the valve body structure includes the swing unit 173 and the driving unit 175 .

[0065] When the swing unit 173 swings back and forth continuously, the pressure channel switches between the on and off states continuously.

[0066] More specifically, in one embodiment, the force that the driving unit 175 can provide to the swing unit 173 is a force that causes the swing unit 173 to switch from the second position to the first position. When the force applied by the driving unit 175 to the swing unit 173 is cancelled, the swing unit 173 can switch from the first position to the second position under the force of its own weight.

[0067] Alternatively, in another embodiment, the force that the driving unit 175 can provide to the swing unit 173 is a force that causes the swing unit 173 to switch from the first position to the second position. When the force applied by the driving unit 175 to the swing unit 173 is cancelled, the swing unit 173 can switch from the second position to the first position under the force of its own weight.

[0068] Thus, by continuously starting and stopping the driving unit 175, the refrigerant passage 16 can be continuously switched between the on and off states.

[0069] Alternatively, in some other embodiments, the driving unit 175 can provide a force for the swing unit 173 to switch from the second position to the first position, and can also provide a force for the swing unit 173 to switch from the first position to the second position. The driving unit 175 directly drives the swing unit 173 to swing back and forth between the first position and the second position.

[0070] Specifically, Figure 2 As shown, in one embodiment, the driving unit 175 includes a high-frequency switching power supply 1751 and a coil 1752, and the high-frequency switching power supply 1751 is electrically connected to the coil 1752, and the sealing plug 174 is located within the magnetic field generated when the coil 1752 is energized, and when the coil 1752 is energized, the sealing plug 174 is subjected to a magnetic attraction force switching from the second position to the first position in the magnetic field.

[0071] The high-frequency switching power supply 1751 can input a continuously changing electric field into the coil 1752 at different frequencies, so that the coil 1752 generates a magnetic field at a certain frequency. When the coil 1752 generates a magnetic field, the sealing plug 174 switches from the second position to the first position. When the coil 1752 does not generate a magnetic field, the sealing plug 174 returns to the first position. By adjusting the operating frequency of the high-frequency switching power supply 1751, the frequency of the magnetic field generated by the coil 1752 can be controlled.

[0072] The operating frequency f1max of the high-frequency switching power supply 1751 and the operating frequency f2max of the compressor 11 when the fin amplitude on the first heat exchanger 12 and / or the second heat exchanger 13 is the largest can be obtained by continuously changing the operating frequency of the high-frequency switching power supply 1751 and the operating frequency f2max of the compressor 11. During the self-cleaning process, the high-frequency switching power supply 1751 operates at the frequency f1max, and the compressor 11 operates at the frequency f2max.

[0073] Further, in one embodiment, if Figure 2 As shown, the frequency conversion switch device 17 further includes an elastic reset member 176, which is disposed between the cavity wall of the pressure cavity 171 and the sealing plug 174, and is used to provide a reset force for the sealing plug 174 to reset from the first position to the second position.

[0074] like Figure 2 As shown, in one embodiment, when the coil 1752 is powered off and does not generate a magnetic field, the elastic reset member 176 resets the sealing plug 174 to the second position.

[0075] More specifically, in one embodiment, Figure 2 As shown, the cross-sectional shape of the sealing plug 174 is consistent with the shape of the outlet of the pressure chamber 171. Therefore, when the sealing plug 174 moves to the outlet of the pressure chamber 171, the outlet of the pressure chamber 171 can be blocked, so that the pressure channel is cut off.

[0076] Furthermore, if Figure 2 As shown, in one embodiment, the outlet of the pressure chamber 171 is oriented in a first direction, a plane perpendicular to the first direction is a reference plane, the sealing plug 174 is disc-shaped, and the sealing plug 174 moves on a plane parallel to the reference plane when swinging.

[0077] The disk-shaped sealing plug 174 encounters less resistance from the refrigerant when switching between the first position and the second position, and the state switching is more flexible.

[0078] Specifically, in one embodiment, Figure 2 As shown, the swing unit 173 includes a swing rod, one end of which is hinged to the wall of the pressure chamber 171, and the other end of which is connected to the sealing plug 174, and the length direction of the swing rod is perpendicular to the axial direction of the sealing plug 174.

[0079] Furthermore, when the frequency conversion switch device 17 operates for a period of time and dust on the first heat exchanger 12 and / or the second heat exchanger 13 falls off, the fan in the first heat exchanger 12 and / or the second heat exchanger 13 can be operated at a maximum wind speed to blow the dust out of the heat exchanger.

[0080] When the first heat exchanger 12 and / or the second heat exchanger 13 is located in an environment such as indoors where it is not convenient to blow out the dust directly, Figure 3 As shown, dust can be blown to specific areas.

[0081] Specifically, in one embodiment, Figure 3 As shown, the first heat exchanger 12 and / or the second heat exchanger 13 comprises a shell 121, a heat exchange tube and a fin disposed on the heat exchange tube, the fin is disposed in the shell 121, and both ends of the heat exchange tube are connected to the refrigerant passage 16;

[0082] The shell 121 is also provided with a dust removal opening 122 , and the dust removal opening 122 is provided with a dust removal duct (not shown in the figure). The shell 121 is provided with a dust removal fan (not shown in the figure), and the dust removal fan is used to blow the dust falling from the fins toward the dust removal opening 122 .

[0083] Thus, the dust blown out from the dust removal opening 122 will be guided to the target area by the dust removal duct.

[0084] Furthermore, in one embodiment, the dust removal opening 122 is located on the left side wall or the right side wall of the shell 121, and a dust removal inlet is also provided on the shell 121 at a position opposite to the dust removal opening 122, so that when the dust removal fan is started, air can circulate to carry away the dust.

[0085] Furthermore, if Figure 3 As shown, in one embodiment, the housing 121 is provided with an air inlet 124 for allowing air to be heat exchanged to enter, and a cover plate 123 is movably provided at the air inlet 124 .

[0086] During normal cooling or heating, the cover plate 123 is opened to allow air to enter the housing 121 from the air inlet 124. During the self-cleaning process, the cover plate 123 is closed to block the air inlet 124 to prevent dust from leaking out of the housing 121 from the air inlet 124.

[0087] Furthermore, if Figure 1 As shown, in one embodiment, a vibration detection device 18 is provided on the first heat exchanger 12 and / or the second heat exchanger 13, and the vibration detection device 18 is electrically connected to the frequency conversion switch device 17, and the vibration detection device 18 is electrically connected to the compressor 11.

[0088] The vibration detection device 18 is used to detect the vibration of the heat exchanger that needs to be self-cleaned. As mentioned above, in order to obtain the maximum moment of the fin amplitude, the operating frequency of the variable frequency switch device 17 and the operating frequency of the compressor 11, at the start of self-cleaning, the operating frequency of the variable frequency switch device 17 and the operating frequency of the compressor 11 can be continuously adjusted, and the vibration of the heat exchanger to be self-cleaned can be obtained synchronously through the vibration detection device 18. In this way, the operating frequency f1max of the variable frequency switch device 17 and the operating frequency f2max of the compressor 11 are identified when the fin vibration amplitude in the heat exchanger that needs to be self-cleaned is the largest.

[0089] Furthermore, in yet another embodiment, a method for self-cleaning an air conditioner is provided, comprising the following steps:

[0090] Controlled by a self-cleaning command, refrigerant is intermittently introduced into a heat exchanger to be cleaned in the air-conditioning system.

[0091] The above scheme provides an air conditioning self-cleaning method. Through a controlled self-cleaning instruction, refrigerant is intermittently introduced into the heat exchanger to be cleaned in the air-conditioning system. In the process of the refrigerant being intermittently introduced into the evaporator, a pressure shock wave is formed. The heat exchanger vibrates under the action of the pressure shock wave, thereby causing dust on the heat exchanger to fall off, thereby achieving the purpose of self-cleaning.

[0092] Furthermore, in order to improve the efficiency of self-cleaning, the frequency of intermittently introducing refrigerant into the heat exchanger to be cleaned in the air-conditioning system may be set to an optimal value, wherein the optimal value is the frequency of intermittently introducing refrigerant into the heat exchanger to be cleaned in the air-conditioning system when the fin amplitude in the heat exchanger to be cleaned is the largest.

[0093] Specifically, in one embodiment, the interval frequency of intermittently introducing the refrigerant into the heat exchanger to be cleaned in the air conditioning system is F1;

[0094] Obtaining a value Fmax of the interval frequency F1 when the fin amplitude in the heat exchanger is maximum;

[0095] The refrigerant is intermittently input into the heat exchanger in such a manner that the interval frequency F1 becomes Fmax.

[0096] like Figure 4 As shown, the specific method of obtaining Fmax can be the following steps:

[0097] Continuously adjusting the operating frequency of the variable frequency switch device 17 and the operating frequency of the compressor 11, and synchronously collecting the amplitude of the fins in the heat exchanger to be self-cleaned;

[0098] Until the amplitude of the fins in the heat exchanger to be self-cleaned is the maximum, the operating frequency f1max of the variable frequency switch device 17 and the operating frequency f2max of the compressor 11 are obtained.

[0099] Then, the variable frequency switch device 17 is controlled to operate at the frequency f1max, and the compressor 11 is controlled to operate at the frequency f2max.

[0100] Further, in one embodiment, the air conditioning system is the air conditioning self-cleaning system 10 described above;

[0101] The step of intermittently introducing refrigerant into the heat exchanger to be cleaned in the air-conditioning system under the control of the self-cleaning instruction comprises the following steps:

[0102] Controlled by the self-cleaning instruction, the throttling device 15 between the first heat exchanger 12 and the second heat exchanger 13 is adjusted to a maximum opening;

[0103] The pressure value in the pressure chamber 171 is detected, and when the pressure value in the pressure chamber 171 reaches 80% of the protection value, the frequency conversion switch device 17 is started.

[0104] The variable frequency switch device 17 is operated at a certain frequency to realize intermittent on and off of the refrigerant passage 16, so that the refrigerant is intermittently passed into the heat exchanger that needs to be self-cleaned.

[0105] Further, in one embodiment, the air conditioning system is the above-mentioned air conditioning self-cleaning system 10, and during cooling, the first heat exchanger 12 is a condenser, and the second heat exchanger 13 is an evaporator;

[0106] The method further includes the following steps before intermittently introducing the refrigerant into the heat exchanger to be cleaned in the air conditioning system:

[0107] If the heat exchanger to be cleaned is the first heat exchanger 12, the air conditioning system is switched to a cooling mode;

[0108] If the heat exchanger to be cleaned is the second heat exchanger 13, the air conditioning system is switched to a heating mode.

[0109] When the air conditioning system is switched to cooling mode, the refrigerant passing through the frequency conversion switch device 17 first reaches the first heat exchanger 12 ; when the air conditioning system is switched to heating mode, the refrigerant passing through the frequency conversion switch device 17 first reaches the second heat exchanger 13 .

[0110] Furthermore, if the first heat exchanger 12 is located outdoors, after the first heat exchanger 12 is vibrated, the fan of the first heat exchanger 12 can be adjusted to a maximum wind speed to blow the shaken dust directly outdoors.

[0111] Furthermore, in one embodiment, if the second heat exchanger 13 is located indoors, when the second heat exchanger 13 vibrates, the cover plate 123 on the second heat exchanger 13 can be adjusted to a state where the air inlet 124 is blocked. After the second heat exchanger 13 has finished vibrating, the dust removal fan is started so that the dust removed by the dust removal is discharged from the dust removal duct to the target area.

[0112] Furthermore, how to determine whether the vibration of the first heat exchanger 12 and / or the second heat exchanger 13 is completed can be achieved by detecting whether the operating time of the frequency conversion switch device 17 according to the target frequency, such as frequency f1max, reaches a preset time T1. If the preset time is reached, it proves that the vibration time has reached the standard and the dust on the first heat exchanger 12 and / or the second heat exchanger 13 has basically fallen off.

[0113] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0114] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0115] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0116] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0117] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0118] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0119] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An air conditioning self-cleaning system, characterized in that: include: A refrigerant circulation system, the refrigerant circulation system comprising a compressor, a first heat exchanger and a second heat exchanger, the compressor, the first heat exchanger and the second heat exchanger are all connected to a refrigerant passage to form a refrigerant circulation loop; A variable frequency switch device, the variable frequency switch device is arranged on the refrigerant passage, and is used to control the on-off frequency of the refrigerant passage to form a pressure shock wave, and the pressure shock wave is transmitted to the first heat exchanger and / or the second heat exchanger to make the first heat exchanger and / or the second heat exchanger vibrate so as to drop dust; The first heat exchanger and / or the second heat exchanger includes a shell, a heat exchange tube and fins arranged on the heat exchange tube, the fins are arranged in the shell, both ends of the heat exchange tube are connected to the refrigerant passage, a dust removal opening is also provided on the shell, the dust removal opening is provided with a dust removal pipe, and a dust removal fan is provided in the shell, and the dust removal fan is used to blow dust falling from the fins to the dust removal opening.

2. The air conditioning self-cleaning system according to claim 1, characterized in that: The variable frequency switch device is located between the exhaust port of the compressor and the first heat exchanger.

3. The air conditioning self-cleaning system according to claim 2, characterized in that: The refrigerant circulation system further includes a four-way valve, two water ports of the four-way valve are respectively connected to the air inlet and the exhaust port of the compressor, and the other two water ports of the four-way valve are respectively connected to the first heat exchanger and the second heat exchanger, forming a refrigerant circulation system that can both cool and heat; The frequency conversion switch device is located on the refrigerant passage connected between the compressor exhaust port and the four-way valve.

4. The air conditioning self-cleaning system according to claim 1, characterized in that: The frequency conversion switch device has a pressure chamber, and the pressure chamber has an inlet and an outlet to form a pressure channel. The pressure channel is connected to the refrigerant passage. The frequency conversion switch device also includes a valve body structure for controlling the switch of the pressure channel. The frequency conversion switch device is provided with a pressure detection device, and the pressure detection device is used to detect the pressure in the pressure chamber. The pressure detection device is electrically connected to the frequency conversion switch device.

5. The air conditioning self-cleaning system according to claim 1, characterized in that: The variable frequency switch device has a pressure chamber, the pressure chamber has an inlet and an outlet, forming a pressure channel, the pressure channel is connected to the refrigerant passage, the variable frequency switch device also includes a swing unit and a driving unit, the swing unit is arranged in the pressure chamber, and the swing unit includes a sealing plug, the driving unit is used to drive the swing unit to swing in the pressure chamber, so that the sealing plug can switch between a first position and a second position; When the sealing plug is located at the first position, the sealing plug blocks and cuts off the pressure channel. When the sealing plug is located at the second position, the pressure channel is open.

6. The air conditioning self-cleaning system according to claim 5, characterized in that: The cross-sectional shape of the sealing plug is consistent with the outlet shape of the pressure chamber; And / or, the outlet of the pressure chamber is oriented in a first direction, a plane perpendicular to the first direction is a reference plane, the sealing plug is disc-shaped, and the sealing plug moves on a plane parallel to the reference plane when swinging.

7. The air conditioning self-cleaning system according to claim 5, characterized in that: The driving unit includes a high-frequency switching power supply and a coil, wherein the high-frequency switching power supply is electrically connected to the coil, and the sealing plug is located within the range of the magnetic field generated when the coil is energized, and when the coil is energized, the sealing plug is subjected to a magnetic attraction force in the magnetic field that switches from the second position to the first position.

8. The air conditioning self-cleaning system according to claim 5, characterized in that: The frequency conversion switch device further comprises an elastic reset member, which is arranged between the wall of the pressure chamber and the sealing plug and is used to provide a reset force for the sealing plug to reset from the first position to the second position.

9. The air conditioning self-cleaning system according to any one of claims 1 to 8, characterized in that: The shell is provided with an air inlet for allowing air to be exchanged with heat to enter, and a cover plate is movably provided at the air inlet.

10. The air conditioning self-cleaning system according to any one of claims 1 to 8, characterized in that: The first heat exchanger and / or the second heat exchanger is provided with a vibration detection device, the vibration detection device is electrically connected to the frequency conversion switch device, and the vibration detection device is electrically connected to the compressor.

11. An air conditioner self-cleaning method, characterized in that: The following steps are involved: Controlled by a self-cleaning instruction, refrigerant is intermittently introduced into a heat exchanger to be cleaned in an air-conditioning system, wherein the air-conditioning system is an air-conditioning self-cleaning system as described in any one of claims 1-10.

12. The air conditioner self-cleaning method according to claim 11, characterized in that: The interval frequency of intermittently introducing refrigerant into the heat exchanger to be cleaned in the air-conditioning system is F1; Obtaining a value Fmax of the interval frequency F1 when the fin amplitude in the heat exchanger is maximum; The refrigerant is intermittently input into the heat exchanger in such a manner that the interval frequency F1 becomes Fmax.

13. The air conditioner self-cleaning method according to claim 11, characterized in that: The air conditioning system is the air conditioning self-cleaning system according to any one of claims 4 to 8; The step of intermittently introducing refrigerant into the heat exchanger to be cleaned in the air-conditioning system under the control of the self-cleaning instruction comprises the following steps: Controlled by the self-cleaning instruction, adjusting the throttling device between the first heat exchanger and the second heat exchanger to a maximum opening; The pressure value in the pressure chamber is detected, and the frequency conversion switch device is started when the pressure value in the pressure chamber reaches 80% of the protection value.

14. The air conditioner self-cleaning method according to claim 11, characterized in that: The air conditioning system is the air conditioning self-cleaning system according to claim 3, and in cooling, the first heat exchanger is a condenser, and the second heat exchanger is an evaporator; The method further includes the following steps before intermittently introducing the refrigerant into the heat exchanger to be cleaned in the air conditioning system: If the heat exchanger to be cleaned is the first heat exchanger, switching the air conditioning system to a cooling mode; If the heat exchanger to be cleaned is the second heat exchanger, the air conditioning system is switched to a heating mode.

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