CN109681969B - Compressor vibration isolation structure, air conditioner and control method of air conditioner - Google Patents
Compressor vibration isolation structure, air conditioner and control method of air conditioner Download PDFInfo
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- CN109681969B CN109681969B CN201910145323.2A CN201910145323A CN109681969B CN 109681969 B CN109681969 B CN 109681969B CN 201910145323 A CN201910145323 A CN 201910145323A CN 109681969 B CN109681969 B CN 109681969B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/08—Compressors specially adapted for separate outdoor units
- F24F1/12—Vibration or noise prevention thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
- F24F2130/40—Noise
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a compressor vibration isolation structure, an air conditioner and a control method thereof, wherein the compressor vibration isolation structure comprises: the piezoelectric pad is arranged at the upper part of the elastic foot pad and can deform along the axial direction when being electrified; the fixing bolt penetrates through the elastic foot pad and the piezoelectric gasket; the fixing nut is sleeved on the upper portion of the fixing bolt, and the gap between the upper surface of the piezoelectric gasket and the lower surface of the fixing nut in the power-off state is smaller than the gap between the upper surface of the piezoelectric gasket and the lower surface of the fixing nut in the power-on state. The compressor vibration isolation structure provided by the invention adopts the cooperation of the elastic foot pad and the piezoelectric gasket, so that the requirements of falling transportation and stress can be better met, and meanwhile, the compressor vibration isolation structure has better vibration and noise reduction performance.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a compressor vibration isolation structure, an air conditioner comprising the compressor vibration isolation structure and a control method of the air conditioner.
Background
Noise of the air conditioner is an important assessment standard for evaluating performance, and vibration of the compressor and the pipe thereof is a main cause of vibration noise generated by the outdoor unit. When the compressor is started, pressure pulsation caused by the impact of the internal refrigerant is transmitted to the pipeline along with the flowing of the refrigerant and even transmitted to the peripheral metal plate. In the prior art, a rubber foot pad is usually adopted to inhibit the vibration of the compressor, so that the system noise is reduced; however, the rigidity of the rubber foot pad cannot be too low due to the requirements of transportation drop and stress, so that the existing scheme cannot simultaneously meet the requirements of noise vibration and drop transportation.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems.
Therefore, the first aspect of the present invention aims to provide a vibration isolation structure for a compressor.
An object of a second aspect of the present invention is to provide an air conditioner including the above compressor vibration isolating structure.
An object of a third aspect of the present invention is to provide a control method for the air conditioner.
In order to achieve the above object, a first aspect of the present invention provides a compressor vibration isolation structure, including: an elastic foot pad; the piezoelectric gasket is arranged on the upper part of the elastic foot pad and can deform along the axial direction when being electrified; the fixing bolt penetrates through the elastic foot pad and the piezoelectric gasket; and the fixing nut is sleeved on the upper part of the fixing bolt, and the clearance between the upper surface of the piezoelectric gasket and the lower surface of the fixing nut in a power-off state is smaller than the clearance between the upper surface of the piezoelectric gasket and the lower surface of the fixing nut in a power-on state.
According to the compressor vibration isolation structure provided by the technical scheme, the elastic foot pad is matched with the piezoelectric gasket, so that the requirements of falling transportation and stress can be better met, and the compressor vibration isolation structure has better vibration and noise reduction performance. Specifically, in the transportation process of the air conditioner outdoor unit, the piezoelectric gasket is in a non-electrifying mode, and a small gap or no gap is kept between the piezoelectric gasket and the fixing nut in a power-off state, so that the deformation space of the elastic foot pad can be reduced, the rigidity of the vibration isolation structure of the whole compressor is improved, and the requirements of falling, collision and other problems in the transportation process are met; when the air conditioner is installed and electrified, the piezoelectric gasket is in an electrified state, the piezoelectric gasket deforms along the axial direction when electrified by utilizing the inverse piezoelectric effect of the piezoelectric gasket, the gap between the piezoelectric gasket and the fixing nut is increased when the piezoelectric gasket is electrified, and at the moment, the elastic foot pad has a larger deformation space, only the elastic foot pad is needed for vibration isolation, so that the vibration of the compressor can be effectively reduced, and the system noise is reduced; the elastic foot pad can be made of a softer rubber material with lower rigidity, specifically ethylene propylene diene monomer or natural rubber, and can further effectively reduce the vibration of the compressor, so that the system noise is reduced; compare traditional compressor callus on the sole, this scheme compromises simultaneously the damping and falls the requirement of making an uproar and fall transportation and pipeline stress, makes each relevant index of air conditioning system reach the optimum.
In addition, the vibration isolation structure for the compressor provided in the above technical solution of the present invention may further have the following additional technical features:
in one embodiment, a gap between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut in the power-off state is greater than or equal to 0mm and less than or equal to 2 mm.
Above-mentioned scheme is in order to ensure that piezoelectric gasket (in the transportation piezoelectric gasket is in the outage state) and fixation nut between the zero clearance or have less clearance, can reduce the deformation space of elasticity callus on the sole like this, improves the rigidity of whole compressor vibration isolation structure, satisfies the demand of falling, collision scheduling problem in the transportation.
In one embodiment, a gap between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut in the power-off state is equal to 0mm, and a gap between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut in the power-on state is greater than 0 mm.
The scheme ensures that no gap exists between the piezoelectric gasket and the fixing nut in the transportation process (the piezoelectric gasket is in a power-off state in the transportation process), so that the deformation of the elastic foot pad in the transportation process is reduced as much as possible, the rigidity of the vibration isolation structure of the whole compressor is improved, and the requirements of falling, collision and other problems in the transportation process are met; and a gap is formed between the piezoelectric gasket and the fixing nut after the air conditioner is installed and electrified (the piezoelectric gasket is in an electrified state after the air conditioner is installed and electrified), so that the vibration energy transmitted to the chassis can be better attenuated when the compressor vibrates by the elastic foot pad, and the system vibration and noise are reduced.
In one embodiment, the maximum height of the piezoelectric patch in the axial direction in the power-off state is greater than the maximum height of the piezoelectric patch in the axial direction in the power-on state.
Above-mentioned scheme can ensure that piezoelectric gasket compares in the outage state under the on-state along axial highly reducing, can realize increasing the purpose in the clearance between piezoelectric gasket's upper surface and fixation nut's the lower surface under the on-state like this to make the vibration energy that the elasticity callus on the sole transmitted to the chassis better decay when the compressor vibrates, thereby reduce system vibration and noise.
In one embodiment, the upper surface of the piezoelectric gasket is a curved surface with a convex middle part in a power-off state, and the upper surface of the piezoelectric gasket is a curved surface or a plane with a curvature smaller than that in the power-off state in the power-on state.
Specifically, in the transportation process of the air conditioner outdoor unit, the piezoelectric gasket adopts a non-electrifying mode, is in a curved surface shape with a convex middle part, has no gap or small gap with the fixing nut, and can meet the requirements of falling, collision and other problems in the transportation process; after the air conditioner is installed and powered on, the piezoelectric gasket is in a power connection state, the original curved surface is changed into a curved surface or a plane with smaller curvature, the gap between the piezoelectric gasket and the fixing nut is increased, vibration isolation is only needed by the elastic foot pad at the moment, the elastic foot pad can be made of rubber materials such as ethylene propylene diene monomer or natural rubber, softer materials with lower rigidity are selected, vibration of the compressor can be effectively reduced, and accordingly system noise is reduced. Of course, the form of the piezoelectric spacer before and after the energization is not limited to the above specific definition, and the design concept of the present invention is not deviated as long as the height of the piezoelectric spacer in the axial direction after the energization is reduced and the gap between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut is increased.
In one embodiment, a lead for connecting current is connected to the piezoelectric gasket, so that the piezoelectric gasket is mechanically deformed by applying an electric field to the piezoelectric gasket; in one embodiment, the lead is welded on the piezoelectric gasket, and the lead is simple to process, firm in fixation and high in reliability.
In one embodiment, the elastic foot pad is an ethylene propylene diene monomer foot pad or a natural rubber foot pad. The elastic foot pad adopts soft ethylene propylene diene monomer rubber or natural rubber with lower rigidity, so that the vibration of the compressor can be further effectively reduced, and the system noise is reduced; of course, the material of the elastic foot pad is not limited to the specific definition described above.
A second aspect of the present invention provides an air conditioner, including: a chassis; a compressor; and the compressor vibration isolation structure according to any one of the above technical solutions, wherein the compressor is supported on the base plate through the compressor vibration isolation structure.
The air conditioner provided by the technical scheme of the invention has the beneficial effects of the compressor vibration isolation structure in any technical scheme because the air conditioner comprises the compressor vibration isolation structure in any technical scheme.
In one embodiment, the compressor comprises a compressor body and a compressor foot fixed on the compressor body, the elastic foot pad is connected with the compressor foot to support the compressor body, and the piezoelectric gasket is located above the compressor foot.
Above-mentioned design piezoelectric gasket is located the top of compressor footing, realizes that the weight of compressor body is whole to be pressed on the elasticity callus on the sole, and piezoelectric gasket does not bear the weight of compressor body to utilize the vibration and the noise of elasticity callus on the sole decay compressor body well, and avoid piezoelectric gasket to damage because of intensity is not enough.
In one embodiment, the air conditioner includes: the power supply circuit is electrically connected with the piezoelectric gasket and used for supplying current to the piezoelectric gasket; and the controller is electrically connected with the power supply circuit and used for controlling the power supply circuit to supply current adaptive to the running state of the compressor to the piezoelectric gasket according to the running state of the compressor.
When the power supply circuit is not electrified, the piezoelectric gasket is in a power-off state; when the power supply circuit is electrified, the current provided by the power supply circuit to the piezoelectric gasket is controlled according to the running state of the compressor, so that the deformation of the piezoelectric gasket can be changed by changing the current, the size of the gap between the piezoelectric gasket and the fixing nut is changed, and the vibration and the noise generated when the compressor runs are better attenuated.
In one embodiment, the operating state of the compressor includes: the system comprises a first operation state that the compressor starts to operate and operates for no more than a first preset time, a second operation state that the compressor operates for no more than the first preset time, and a third operation state that the compressor stops operating and stops operating for no more than a second preset time; the power supply circuit provides current to the piezoelectric gasket when the compressor is in the first operation state and the third operation state, and the current is larger than or equal to the current provided to the piezoelectric gasket when the compressor is in the second operation state.
Specifically, the vibration of the compressor in the starting and stopping process is usually larger than that of the compressor in normal operation, so that the power supply circuit can be controlled to provide larger current for the piezoelectric gasket in the starting and stopping process of the compressor, the piezoelectric gasket can generate larger axial deformation, larger deformation space is provided for the elastic foot pad, and the vibration and the noise of the compressor can be well attenuated by the elastic foot pad; and the compressor operates steadily at compressor normal operating in-process, and the vibration reduces when relative compressor starts to stop, suitably reduces the electric current that supply circuit provided to piezoelectric gasket this moment, can make piezoelectric gasket suitably reduce along axial deformation, and the deformation space of elasticity callus on the sole reduces, also can ensure the vibration and the noise of elasticity callus on the sole decay compressor well this moment, avoids the energy waste that the heavy current leads to simultaneously.
In one embodiment, a gap d between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut when the power supply circuit is powered off, a gap d1 between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut when the compressor is in the first operating state, a gap d2 between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut when the compressor is in the second operating state, and a gap d3 between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut when the compressor is in the third operating state satisfy the following relations: d is more than d2 and less than or equal to d1, and d is more than d2 and less than or equal to d 3.
The scheme realizes the form control of the piezoelectric gasket along with three states of transportation, start-stop and normal operation, so that the vibration isolation structure of the compressor meets the requirements of vibration and noise reduction, drop transportation and pipeline stress; in one embodiment, d1 ═ d 3.
In one embodiment, the air conditioner includes: and the power supply circuit is electrically connected with the piezoelectric gasket and used for providing current with preset magnitude to the piezoelectric gasket when the air conditioner is electrified.
According to the scheme, the constant current can be supplied to the piezoelectric gasket when the power supply circuit is electrified, and the current is not supplied to the piezoelectric gasket when the power supply circuit is not electrified, so that the requirements of vibration reduction, noise reduction, drop transportation and pipeline stress are met, and the control function of the air conditioner is simplified.
An aspect of the third aspect of the present invention provides a control method for an air conditioner, for controlling the air conditioner according to one or more of the above aspects, the control method including: acquiring the running state of a compressor; and controlling a power supply circuit to supply current adaptive to the running state of the compressor to the piezoelectric gasket according to the running state of the compressor.
According to the control method of the air conditioner, provided by the technical scheme of the invention, when the power supply circuit is not electrified, the piezoelectric gasket is in a power-off state, so that no gap or small gap is ensured between the piezoelectric gasket and the fixing nut in the transportation process of the air conditioner, and the problems of falling, collision and the like in the transportation process are solved; when the power supply circuit is electrified, the piezoelectric gasket is in an electrified state, the piezoelectric gasket deforms along the axial direction when electrified by utilizing the inverse piezoelectric effect of the piezoelectric gasket, the gap between the piezoelectric gasket and the fixing nut is increased when the piezoelectric gasket is electrified, and at the moment, vibration isolation is only needed by the elastic foot pad, so that the vibration of the compressor can be effectively reduced, and the system noise is reduced; when the power supply circuit is electrified, the current supplied to the piezoelectric gasket by the power supply circuit is controlled according to the running state of the compressor, so that the deformation of the piezoelectric gasket can be changed by changing the current, the size of the gap between the piezoelectric gasket and the fixing nut is changed, and the vibration and the noise generated when the compressor runs are better attenuated.
In one embodiment, the controlling the power supply circuit to supply a current adapted to the operating state of the compressor to the piezoelectric patch according to the operating state of the compressor includes: when the compressor starts to operate and the operation does not exceed a first preset time length, controlling the power supply circuit to provide a first preset current for the piezoelectric gasket; when the compressor runs for more than a first preset time length, controlling the power supply circuit to provide a second preset current for the piezoelectric gasket; and when the compressor stops running and the running stop time does not exceed a second preset time length, controlling the power supply circuit to provide a third preset current for the piezoelectric gasket.
In an embodiment, the first predetermined current and the third predetermined current are both greater than the second predetermined current.
Specifically, in the transportation process of the air conditioner, the power supply circuit is not electrified, and the piezoelectric gasket is in a power-off state, so that no gap or small gap is ensured between the piezoelectric gasket and the fixing nut, and the problems of falling, collision and the like in the transportation process are solved; after the air conditioner is installed and powered on, the inverse piezoelectric effect of the piezoelectric gasket is utilized, the magnitude of current provided by the power supply circuit to the piezoelectric gasket can be controlled according to the running state of the compressor, specifically, the vibration of the compressor in the starting and stopping process is usually larger than that of the compressor in normal running, so that the power supply circuit can be controlled to provide larger current to the piezoelectric gasket in the starting and stopping process of the compressor, a larger deformation space can be provided for the elastic foot pad, and the vibration and noise of the compressor can be well attenuated by the elastic foot pad; in the normal operation process of the compressor, the current supplied to the piezoelectric gasket by the power supply circuit is properly reduced, the elastic foot pad can be ensured to well attenuate the vibration and noise of the compressor, and the energy waste caused by large current is avoided; thereby realizing the shape control of the piezoelectric gasket along with three states of transportation, start-stop and normal operation; in one embodiment, the first predetermined current and the third predetermined current are equal in magnitude.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a vibration isolating structure of a compressor according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Wherein, the corresponding relationship between the reference numbers and the component names in fig. 1 is:
1 elasticity callus on the sole, 11 through-holes, 2 piezoelectric gasket, 3 fixing bolt, 4 fixation nut, 5 chassis, 6 compressor footing.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A compressor vibration isolating structure, an air conditioner, and a control method of the air conditioner according to some embodiments of the present invention will be described below with reference to fig. 1 and 2.
As shown in fig. 1, there is provided a compressor vibration isolating structure according to some embodiments of the present invention, including: elastic foot pad 1, piezoelectric gasket 2, fixing bolt 3 and fixation nut 4.
Specifically, as shown in fig. 1, the piezoelectric gasket 2 is arranged on the upper portion of the elastic foot pad 1, the piezoelectric gasket 2 has an inverse piezoelectric effect, and the piezoelectric gasket 2 can deform in the axial direction when being electrified; the fixing bolt 3 penetrates through the elastic foot pad 1 and the piezoelectric gasket 2, specifically, through holes 11 are formed in the elastic foot pad 1 and the piezoelectric gasket 2, and the fixing bolt 3 penetrates through the through holes 11; the fixing nut 4 is sleeved on the upper portion of the fixing bolt 3, so that the piezoelectric gasket 2 is located between the elastic foot pad 1 and the fixing nut 4, and the gap between the upper surface of the piezoelectric gasket 2 and the lower surface of the fixing nut 4 in the power-off state is smaller than the gap between the upper surface of the piezoelectric gasket 2 and the lower surface of the fixing nut 4 in the power-on state.
The compressor vibration isolation structure provided by the embodiment of the invention adopts the cooperation of the elastic foot pad 1 and the piezoelectric gasket 2, so that the requirements of drop transportation and stress can be better met, and the vibration isolation structure has better vibration and noise reduction performance. Specifically, in the transportation process of the air conditioner outdoor unit, the piezoelectric gasket 2 adopts a non-electrification mode, and a small gap or no gap is kept between the piezoelectric gasket 2 and the fixing nut 4 in a power-off state, so that the deformation space of the elastic foot pad 1 can be reduced, the rigidity of the whole compressor vibration isolation structure is improved, and the requirements of the problems of falling, collision and the like in the transportation process are met; when the air conditioner is installed and electrified, the piezoelectric gasket 2 is in an electrified state, the piezoelectric gasket 2 deforms along the axial direction when electrified by utilizing the inverse piezoelectric effect of the piezoelectric gasket 2, the gap between the piezoelectric gasket 2 and the fixing nut 4 is increased in the electrified state, and at the moment, the elastic foot pad 1 has a larger deformation space, only the elastic foot pad 1 needs to carry out vibration isolation, so that the vibration of the compressor can be effectively reduced, and the system noise is reduced; the elastic foot pad 1 can be made of a softer rubber material with lower rigidity, specifically ethylene propylene diene monomer or natural rubber, and can further effectively reduce the vibration of the compressor, so that the system noise is reduced; compare traditional compressor callus on the sole, this scheme compromises simultaneously the damping and falls the requirement of making an uproar and fall transportation and pipeline stress, makes each relevant index of air conditioning system reach the optimum.
In some embodiments, the gap between the upper surface of the piezoelectric spacer 2 and the lower surface of the fixing nut 4 in the power-off state is greater than or equal to 0mm and less than or equal to 2mm, that is, the gap between the upper surface of the piezoelectric spacer 2 and the lower surface of the fixing nut 4 in the power-off state is not greater than 2 mm. A drop test is performed on a product (such as an air conditioner) adopting the compressor of the embodiment of the invention, and it is known that the product drop performance requirement cannot be met when the gap between the upper surface of the piezoelectric gasket 2 and the lower surface of the fixing nut 4 is larger than 2mm, so that the gap between the upper surface of the piezoelectric gasket 2 and the lower surface of the fixing nut 4 in the power-off state is not larger than 2mm by designing, so as to ensure that no gap or a small gap exists between the piezoelectric gasket 2 and the fixing nut 4 in the transportation process (the piezoelectric gasket 2 is in the power-off state in the transportation process), thus the deformation space of the elastic foot pad 1 can be reduced, the rigidity of the vibration isolation structure of the whole compressor is improved, and the requirements of the problems of drop, collision and the like in the transportation process; meanwhile, in order to ensure that a sufficiently large gap is formed between the upper surface of the piezoelectric gasket 2 and the lower surface of the fixing nut 4 in the energized state, so that the vibration transmitted to the chassis 5 can be better attenuated by the elastic foot pad 1 when the compressor works, therefore, the gap between the upper surface of the piezoelectric gasket 2 and the lower surface of the fixing nut 4 in two different states of the energized state and the de-energized state can be comprehensively considered during the design, thereby meeting the requirements of falling and collision during the transportation of products and the requirements of vibration and noise reduction during the work of the products, namely, the gap between the upper surface of the piezoelectric gasket 2 and the lower surface of the fixing nut 4 in the de-energized state can be taken as a value within the range of 0 mm-2 mm according to actual requirements, such as 0mm, 1mm and 2mm, and can be taken as other values within the range or taken as other values outside the range according to actual requirements, without departing from the design concept of the present invention.
In one embodiment, a gap between the upper surface of the piezoelectric spacer 2 and the lower surface of the fixing nut 4 in the power-off state is equal to 0mm, and a gap between the upper surface of the piezoelectric spacer 2 and the lower surface of the fixing nut 4 in the power-on state is greater than 0 mm.
The scheme ensures that no gap exists between the piezoelectric gasket 2 and the fixing nut 4 in the transportation process (the piezoelectric gasket 2 is in a power-off state in the transportation process), so that the deformation of the elastic foot pad 1 in the transportation process is reduced as much as possible, the rigidity of the vibration isolation structure of the whole compressor is improved, and the requirements of falling, collision and other problems in the transportation process are met; and a gap is ensured between the piezoelectric gasket 2 and the fixing nut 4 after the air conditioner is installed and electrified (the piezoelectric gasket 2 is in an electrified state after the air conditioner is installed and electrified), so that the vibration energy transmitted to the chassis 5 can be better attenuated by the elastic foot pad 1 when the compressor vibrates, and the system vibration and noise are reduced.
In one embodiment, the piezoelectric gasket 2 can deform along the axial direction when being powered on, and the maximum height of the piezoelectric gasket 2 along the axial direction in the power-off state is greater than the maximum height of the piezoelectric gasket 2 along the axial direction in the power-on state, so as to ensure that the height of the piezoelectric gasket 2 along the axial direction in the power-on state is reduced compared with the height of the piezoelectric gasket 2 along the axial direction in the power-off state, and thus the purpose of increasing the gap between the upper surface of the piezoelectric gasket 2 and the lower surface of the fixing nut 4 in the power-on state can be achieved, so that the vibration energy transmitted to the chassis 5 by the elastic foot pad 1 is better attenuated when the compressor vibrates, and the system vibration and noise.
In one embodiment, as shown in fig. 1, the upper surface of the piezoelectric spacer 2 is a curved surface with a convex middle portion in the power-off state, and the upper surface of the piezoelectric spacer 2 is a curved surface or a flat surface with a curvature smaller than that in the power-off state in the power-on state. Specifically, in the transportation process of the air conditioner outdoor unit, the piezoelectric gasket 2 adopts an unpowered mode, the piezoelectric gasket 2 is in a curved surface shape with a convex middle part, and a gap is not formed between the piezoelectric gasket 2 and the fixing nut 4 or between the piezoelectric gasket and the fixing nut, so that the requirements of falling, collision and other problems in the transportation process can be met; after the air conditioner is installed and powered on, the piezoelectric gasket 2 is in a power connection state, the original curved surface is changed into a curved surface or a plane with smaller curvature, the gap between the original curved surface and the fixing nut 4 is increased, vibration isolation is only needed to be carried out on the elastic foot pad 1 at the moment, the elastic foot pad 1 can be made of rubber materials such as ethylene propylene diene monomer or natural rubber, softer materials with lower rigidity are selected, vibration of the compressor can be effectively reduced, and accordingly system noise is reduced.
Of course, the form of the piezoelectric spacer 2 before and after energization is not limited to the above specific definition, and as long as the height of the piezoelectric spacer 2 in the axial direction after energization is reduced compared with the height of the piezoelectric spacer in the axial direction before energization, and the gap between the upper surface of the piezoelectric spacer 2 after energization and the lower surface of the fixing nut 4 is increased, the present invention is not departing from the design concept.
In one embodiment, a lead for connecting current is connected to the piezoelectric gasket 2, so that the piezoelectric gasket 2 is mechanically deformed by applying an electric field to the piezoelectric gasket 2; in one embodiment, the lead is welded on the piezoelectric gasket 2, and the piezoelectric gasket is simple to process, firm in fixation and high in reliability. Of course, other connections may be used to secure the wires to the piezoelectric patch 2. Specifically, the piezoelectric patch 2 may be a piezoelectric ceramic sheet, a piezoelectric crystal sheet, a piezoelectric polymer, or the like.
In one embodiment, the elastic foot pad 1 is an ethylene propylene diene monomer foot pad or a natural rubber foot pad. The elastic foot pad 1 adopts soft ethylene propylene diene monomer rubber or natural rubber with lower rigidity, so that the vibration of the compressor can be further effectively reduced, and the noise of the system is reduced; of course, the material of the elastic foot pad 1 is not limited to the above specific definition.
As shown in fig. 1, an embodiment of a second aspect of the present invention provides an air conditioner including: a chassis 5, a compressor and a compressor vibration isolation structure as in any of the above embodiments, the compressor being supported on the chassis 5 by the compressor vibration isolation structure.
The air conditioner provided by the above embodiment of the present invention includes the compressor vibration isolation structure of any one of the above embodiments, so that the air conditioner has the beneficial effects of the compressor vibration isolation structure of any one of the above embodiments, and details are not repeated herein.
In one embodiment, as shown in fig. 1, the compressor includes the compressor body and fixes compressor footing 6 on the compressor body, elastic foot pad 1 is connected with compressor footing 6 to support the compressor body, piezoelectric gasket 2 is located above compressor footing 6, the weight of the compressor body is totally pressed on elastic foot pad 1, and piezoelectric gasket 2 does not bear the weight of the compressor body, thereby vibration and noise of the compressor body are well attenuated by elastic foot pad 1, and piezoelectric gasket 2 is prevented from being damaged due to insufficient strength. Of course, if the strength of the piezoelectric spacer 2 is sufficient, the piezoelectric spacer 2 may be provided under the compressor foot pad 6, or the piezoelectric spacer 2 may be provided at another position such as a lower portion of the elastic foot pad 1.
In one embodiment of the present invention, an air conditioner includes: the power supply circuit is electrically connected with the piezoelectric gasket 2 and is used for supplying current to the piezoelectric gasket 2; the controller is electrically connected with the power supply circuit and is used for controlling the power supply circuit to supply current adaptive to the running state of the compressor to the piezoelectric gasket 2 according to the running state of the compressor.
In the above embodiment, when the power supply circuit is not energized, the piezoelectric patch 2 is in the power-off state; when the power supply circuit is electrified, the current supplied to the piezoelectric gasket 2 by the power supply circuit is controlled according to the running state of the compressor, so that the deformation of the piezoelectric gasket 2 can be changed by changing the current, the size of the gap between the piezoelectric gasket 2 and the fixing nut 4 is changed, and the vibration and the noise generated when the compressor runs are better attenuated.
Specifically, the operation state of the compressor includes: the system comprises a first operation state that the compressor starts to operate and operates for no more than a first preset time, a second operation state that the compressor operates for no more than the first preset time, and a third operation state that the compressor stops operating and stops operating for no more than a second preset time; the power supply circuit supplies current to the piezoelectric gasket 2 when the compressor is in the first operation state and the third operation state, wherein the current is larger than or equal to the current supplied to the piezoelectric gasket 2 when the compressor is in the second operation state.
Generally speaking, the larger the current provided to the piezoelectric gasket 2, the more severe the deformation of the piezoelectric gasket 2, and the vibration of the compressor in the start-stop process is usually greater than the vibration of the compressor in normal operation, so that the power supply circuit can be controlled to provide a larger current to the piezoelectric gasket 2 in the start-stop process of the compressor, and the piezoelectric gasket can generate a larger axial deformation, so that a larger deformation space is provided for the elastic foot pad 1, and the vibration and noise of the compressor can be well attenuated by the elastic foot pad 1; and the compressor operates steadily at compressor normal operating in-process, and the vibration reduces when relative compressor starts to stop, suitably reduces the electric current that supply circuit provided to piezoelectric gasket 2 this moment, can make piezoelectric gasket 2 suitably reduce along axial deformation, and the deformation space of elasticity callus on the sole 1 reduces, also can ensure this moment elasticity callus on the sole 1 attenuate the vibration and the noise of compressor well, avoids the energy waste that the heavy current leads to simultaneously.
Further, a gap d between the upper surface of the piezoelectric spacer 2 and the lower surface of the fixing nut 4 when the power supply circuit is powered off, a gap d1 between the upper surface of the piezoelectric spacer 2 and the lower surface of the fixing nut 4 when the compressor is in the first operation state, a gap d2 between the upper surface of the piezoelectric spacer 2 and the lower surface of the fixing nut 4 when the compressor is in the second operation state, and a gap d3 between the upper surface of the piezoelectric spacer 2 and the lower surface of the fixing nut 4 when the compressor is in the third operation state satisfy the following relations: d < d2 ≦ d1, d < d2 ≦ d3, and in one embodiment, d1 ≦ d 3.
The scheme realizes the form control of the piezoelectric gasket 2 along with three states of transportation, start-stop and normal operation, so that the vibration isolation structure of the compressor meets the requirements of vibration reduction, noise reduction, drop transportation and pipeline stress.
In a specific embodiment, the magnitude of the current provided by the power supply circuit to the piezoelectric gasket 2 is controlled to change the deformation of the piezoelectric gasket 2, so as to change the axial height of the piezoelectric gasket 2, specifically, in the transportation process, no current is provided to the piezoelectric gasket 2, and the upper surface of the piezoelectric gasket 2 is a curved surface with a convex middle part in the power-off state; when the compressor normally operates, relatively small current is provided for the piezoelectric gasket 2, and the upper surface of the piezoelectric gasket 2 is in a curved surface with curvature smaller than that in a power-off state when the compressor normally operates; in the process of starting and stopping the compressor, relatively large current is provided for the piezoelectric gasket 2, namely the current is slightly larger than the current in normal operation of the compressor, the upper surface of the piezoelectric gasket 2 is in a plane in the power-on state and the process of starting and stopping the compressor, and therefore the form control of the piezoelectric gasket 2 along with three states of transportation, starting and stopping and normal operation is achieved.
As shown in fig. 2, an embodiment of a third aspect of the present invention provides a control method of an air conditioner for controlling the air conditioner as in the above embodiments, the control method including:
s102, acquiring the running state of the compressor;
and S104, controlling the power supply circuit to supply current adaptive to the running state of the compressor to the piezoelectric gasket 2 according to the running state of the compressor.
According to the control method of the air conditioner provided by the embodiment of the invention, when the power supply circuit is not electrified, the piezoelectric gasket 2 is in a power-off state, so that no gap or small gap is ensured between the piezoelectric gasket 2 and the fixing nut 4 in the transportation process of the air conditioner, and the problems of falling, collision and the like in the transportation process are solved; when the power supply circuit is electrified, the piezoelectric gasket 2 is in an electrified state, the piezoelectric gasket 2 deforms along the axial direction when electrified by utilizing the inverse piezoelectric effect of the piezoelectric gasket 2, the gap between the piezoelectric gasket 2 and the fixing nut 4 is increased in the electrified state, and at the moment, vibration isolation is only needed by the elastic foot pad 1, so that the vibration of the compressor can be effectively reduced, and the system noise is reduced; when the power supply circuit is electrified, the current supplied to the piezoelectric gasket 2 by the power supply circuit is controlled according to the running state of the compressor, so that the deformation of the piezoelectric gasket 2 can be changed by changing the current, the size of the gap between the piezoelectric gasket 2 and the fixing nut 4 is changed, and the vibration and the noise generated when the compressor runs are better attenuated.
In one embodiment of the present invention, the controlling of the power supply circuit to supply the current adapted to the operation state of the compressor to the piezoelectric patch 2 according to the operation state of the compressor includes: when the compressor starts to operate and the operation does not exceed a first preset time length, controlling the power supply circuit to provide a first preset current for the piezoelectric gasket 2; when the compressor runs for more than the first preset time length, controlling the power supply circuit to provide a second preset current for the piezoelectric gasket 2; and controlling the power supply circuit to supply a third preset current to the piezoelectric gasket 2 when the compressor stops running and the running stop time does not exceed the second preset time length. Specifically, values of the first preset current, the second preset current and the third preset current can be reasonably designed according to actual conditions.
In some embodiments, the first predetermined current and the third predetermined current are both greater than the second predetermined current.
In one embodiment, the first predetermined current and the third predetermined current are equal in magnitude.
Specifically, in the transportation process of the air conditioner, the power supply circuit is not electrified, the piezoelectric gasket 2 is in a power-off state, no gap or small gap is ensured between the piezoelectric gasket 2 and the fixing nut 4, and the problems of falling, collision and the like in the transportation process are solved; after the air conditioner is installed and powered on, the inverse piezoelectric effect of the piezoelectric gasket 2 is utilized, the magnitude of current provided by the power supply circuit to the piezoelectric gasket 2 can be controlled according to the running state of the compressor, specifically, the vibration of the compressor in the starting and stopping process is usually larger than the vibration of the compressor in normal running, so that the power supply circuit can be controlled to provide larger current to the piezoelectric gasket 2 in the starting and stopping process of the compressor, a larger deformation space can be provided for the elastic foot pad 1, and the vibration and noise of the compressor can be well attenuated by the elastic foot pad 1; in the normal operation process of the compressor, the current supplied to the piezoelectric gasket 2 by the power supply circuit is properly reduced, the elastic foot pad 1 can be ensured to well attenuate the vibration and noise of the compressor, and energy waste caused by large current is avoided; therefore, the form control of the piezoelectric gasket 2 along with three states of transportation, start and stop and normal operation is realized.
In another embodiment of the present invention, an air conditioner includes: and the power supply circuit is electrically connected with the piezoelectric gasket 2 and is used for supplying current with a preset magnitude to the piezoelectric gasket 2 when the air conditioner is electrified.
According to the embodiment, the constant current can be supplied to the piezoelectric gasket 2 when the power supply circuit is electrified, and the current is not supplied to the piezoelectric gasket 2 when the power supply circuit is not electrified, so that the control function of the air conditioner is simplified while the requirements of vibration reduction, noise reduction, drop transportation and pipeline stress are met.
It should be noted that, in order to realize the change of the gap between the piezoelectric gasket 2 and the fixing nut 4 in the energized state and the non-energized state by using the inverse piezoelectric effect of the piezoelectric gasket 2, the piezoelectric gasket 2 may be deformed by mm level along the axial direction before and after being energized by reasonably selecting the material of the piezoelectric gasket 2 and the magnitude of the access current thereof, so as to meet the design requirement; the specific material of the piezoelectric gasket 2 and the magnitude of the access current thereof can be reasonably designed according to actual requirements, and if a theoretical calculation or experimental verification mode is adopted, the reasonable matching of the magnitude of the access current and the deformation of the piezoelectric gasket before and after electrification is realized.
In addition, the vibration isolation structure for the compressor provided by the embodiment of the first aspect of the present invention can be applied not only to the air conditioner, but also to other electrical equipment with a compressor, such as a refrigerator, and the like, without departing from the design concept of the present invention, and all of them should fall within the protection scope of the present invention.
In summary, the compressor vibration isolation structure provided by the embodiment of the invention adopts the matching of the rubber foot pad and the piezoelectric gasket by improving the compressor fixing structure, so that the requirements of drop transportation and stress can be better met, and the vibration isolation structure has better vibration and noise reduction performance; and the form control of the piezoelectric gasket along with three states of transportation, start-stop and normal operation can be realized, so that the vibration isolation structure of the compressor better meets the requirements of vibration reduction, noise reduction, drop transportation and pipeline stress, and all relevant indexes of the air-conditioning system are optimal.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, e.g., "connected" may be a fixed connection, a detachable connection, an integral connection, or an electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. A compressor vibration isolation structure, comprising:
an elastic foot pad;
the piezoelectric gasket is arranged on the upper part of the elastic foot pad and can deform along the axial direction when being electrified;
the fixing bolt penetrates through the elastic foot pad and the piezoelectric gasket; and
the fixing nut is sleeved on the upper part of the fixing bolt, and the clearance between the upper surface of the piezoelectric gasket and the lower surface of the fixing nut in a power-off state is smaller than the clearance between the upper surface of the piezoelectric gasket and the lower surface of the fixing nut in a power-on state;
the upper surface of the piezoelectric gasket is a curved surface with a convex middle part in a power-off state.
2. The compressor vibration isolation structure according to claim 1,
and the clearance between the upper surface of the piezoelectric gasket and the lower surface of the fixing nut in the power-off state is more than or equal to 0mm and less than or equal to 2 mm.
3. The compressor vibration isolation structure according to claim 2,
the clearance between the upper surface of the piezoelectric gasket and the lower surface of the fixing nut in the power-off state is equal to 0mm, and the clearance between the upper surface of the piezoelectric gasket and the lower surface of the fixing nut in the power-on state is larger than 0 mm.
4. The compressor vibration isolation structure according to any one of claims 1 to 3,
the maximum height of the piezoelectric gasket along the axial direction in the power-off state is larger than the maximum height of the piezoelectric gasket along the axial direction in the power-on state.
5. The compressor vibration isolation structure according to claim 4,
the upper surface of the piezoelectric gasket is a curved surface or a plane with a curvature smaller than that of the piezoelectric gasket in a power-off state in a power-on state.
6. The compressor vibration isolation structure according to any one of claims 1 to 3,
and the piezoelectric gasket is connected with a lead for connecting current.
7. The compressor vibration isolation structure according to any one of claims 1 to 3,
the elastic foot pad is an ethylene propylene diene monomer foot pad or a natural rubber foot pad.
8. An air conditioner, comprising:
a chassis;
a compressor; and
the compressor vibration isolation structure of any one of claims 1 to 7, said compressor being supported on said base pan by said compressor vibration isolation structure.
9. The air conditioner according to claim 8,
the compressor comprises a compressor body and compressor feet fixed on the compressor body, the elastic foot pads are connected with the compressor feet to support the compressor body, and the piezoelectric gaskets are located above the compressor feet.
10. The air conditioner according to claim 8 or 9, comprising:
the power supply circuit is electrically connected with the piezoelectric gasket and used for supplying current to the piezoelectric gasket; and
and the controller is electrically connected with the power supply circuit and used for controlling the power supply circuit to supply current adaptive to the running state of the compressor to the piezoelectric gasket according to the running state of the compressor.
11. The air conditioner according to claim 10,
the operating state of the compressor includes: the system comprises a first operation state that the compressor starts to operate and operates for no more than a first preset time, a second operation state that the compressor operates for no more than the first preset time, and a third operation state that the compressor stops operating and stops operating for no more than a second preset time;
the power supply circuit provides current to the piezoelectric gasket when the compressor is in the first operation state and the third operation state, and the current is larger than or equal to the current provided to the piezoelectric gasket when the compressor is in the second operation state.
12. The air conditioner according to claim 11,
a gap d between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut when the power supply circuit is powered off, a gap d1 between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut when the compressor is in the first operating state, a gap d2 between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut when the compressor is in the second operating state, and a gap d3 between the upper surface of the piezoelectric spacer and the lower surface of the fixing nut when the compressor is in the third operating state satisfy the following relations: d is more than d2 and less than or equal to d1, and d is more than d2 and less than or equal to d 3.
13. The air conditioner according to claim 8 or 9, comprising:
and the power supply circuit is electrically connected with the piezoelectric gasket and used for providing current with preset magnitude to the piezoelectric gasket when the air conditioner is electrified.
14. A control method of an air conditioner for controlling the air conditioner according to any one of claims 10 to 12, the control method comprising:
acquiring the running state of a compressor;
and controlling a power supply circuit to supply current adaptive to the running state of the compressor to the piezoelectric gasket according to the running state of the compressor.
15. The method for controlling an air conditioner according to claim 14, wherein the controlling the power supply circuit to supply the current adapted to the operation state of the compressor to the piezoelectric patch according to the operation state of the compressor comprises:
when the compressor starts to operate and the operation does not exceed a first preset time length, controlling the power supply circuit to provide a first preset current for the piezoelectric gasket;
when the compressor runs for more than a first preset time length, controlling the power supply circuit to provide a second preset current for the piezoelectric gasket;
and when the compressor stops running and the running stop time does not exceed a second preset time length, controlling the power supply circuit to provide a third preset current for the piezoelectric gasket.
16. The control method of an air conditioner according to claim 15,
the first preset current and the third preset current are both larger than or equal to the second preset current.
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| CN110736158A (en) * | 2019-08-30 | 2020-01-31 | 珠海格力电器股份有限公司 | piezoelectric photonic crystal type vibration-proof pipeline, vibration-proof method and air conditioner |
| CN110513275B (en) * | 2019-09-17 | 2020-06-16 | 珠海格力电器股份有限公司 | Compressor fixing structure, using method thereof and air conditioner |
| CN114113681B (en) * | 2021-11-11 | 2024-05-28 | 维沃移动通信有限公司 | Acceleration sensor, control method and control device thereof and electronic equipment |
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| CN103047363B (en) * | 2012-12-27 | 2015-04-08 | 南京航空航天大学 | Active vibration isolation device with adjustable rigidity and damping |
| JP2015209964A (en) * | 2014-04-30 | 2015-11-24 | いすゞ自動車株式会社 | Vehicle vibration control structure |
| CN106382205B (en) * | 2016-10-31 | 2018-06-19 | 美的集团股份有限公司 | Compressor, air-conditioner outdoor unit and air conditioner |
| CN108800345B (en) * | 2018-06-20 | 2021-10-26 | 广东美的制冷设备有限公司 | Foot pad for compressor, air conditioner outdoor unit, air conditioner and control method of air conditioner |
| CN208535074U (en) * | 2018-07-20 | 2019-02-22 | 上海理工大学 | A kind of piezoelectricity active damper based on cantilever beam |
| CN109281417B (en) * | 2018-11-13 | 2024-03-26 | 广州广日电梯工业有限公司 | Self-powered piezoelectric damping system and method for elevator |
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