CN207585020U - Air conditioner and its frosting detection device - Google Patents
Air conditioner and its frosting detection device Download PDFInfo
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- CN207585020U CN207585020U CN201720550920.XU CN201720550920U CN207585020U CN 207585020 U CN207585020 U CN 207585020U CN 201720550920 U CN201720550920 U CN 201720550920U CN 207585020 U CN207585020 U CN 207585020U
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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Abstract
The utility model discloses a kind of air conditioner and its frosting detection device, the frosting detection device includes：Frosting detection module, the frosting detection module includes at least one frosting inductive component, on the radiating fin or coil pipe of outdoor heat exchanger that each frosting inductive component is set to the air conditioner, when each frosting inductive component senses the outdoor heat exchanger frosting of the air conditioner, the capacitance of the frosting detection module changes；Capacitive detection module, the capacitive detection module is connected with the frosting detection module, the capacitive detection module detects signal by detecting the capacitance of the frosting detection module to generate frosting, so as to accurately detect the frosting degree of outdoor unit outdoor heat exchanger disk, prevent the excessive heating capacity for leading to air conditioner of frosting thickness from declining, it is ensured that the working efficiency of air conditioner.
Description
Technical field
The utility model is related to air conditioner technical field, the frosting detection device and one kind of more particularly to a kind of air conditioner
Air conditioner with the device.
Background technology
In the relevant technologies, moisture, the water of precipitation can easily be precipitated when winter makes outdoor temperature is relatively low for the condenser of air conditioner
The surface for being attached to condenser coil is divided to form frost layer.With the formation of frost layer, the heating capacity of air conditioner declines, air conditioner
Working efficiency reduces.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
It is to propose a kind of frosting detection device of air conditioner with a novel purpose, can accurately detects outdoor unit outdoor heat exchanger
Frosting degree.
Another purpose of the utility model is to propose a kind of air conditioner.
In order to achieve the above objectives, the frosting detection device of on the one hand a kind of air conditioner that the utility model proposes, including：Knot
White detection module, the frosting detection module include at least one frosting inductive component, each frosting inductive component setting
In on the radiating fin or coil pipe of the outdoor heat exchanger of the air conditioner, the sky is sensed in each frosting inductive component
The capacitance of the frosting detection module changes when adjusting the outdoor heat exchanger frosting of device；Capacitive detection module, the capacitance
Detection module is connected with the frosting detection module, and the capacitive detection module is by detecting the capacitance of the frosting detection module
Value detects signal to generate frosting.
According to the utility model proposes air conditioner frosting detection device, in the radiating fin or coil pipe of outdoor heat exchanger
It is upper that the frosting detection module for including at least one frosting inductive component is set, sense air conditioner in each frosting inductive component
The capacitance of frosting detection module changes during outdoor heat exchanger frosting, and capacitive detection module is by detecting frosting detection module
Capacitance with generate frosting detection signal, so as to accurately detect the frosting degree of outdoor unit outdoor heat exchanger, prevent from tying
The excessive heating capacity for leading to air conditioner of frost thickness declines, it is ensured that the working efficiency of air conditioner.
Further, each frosting inductive component includes first electrode and second electrode, the first electrode and the
Two electrodes may be contained on the radiating fin or coil pipe of the outdoor heat exchanger of the air conditioner.
Further, each frosting inductive component includes the first shielded cable and secondary shielding cable, and described first
Shielded cable and secondary shielding cable are corresponding with the first electrode and second electrode connected respectively, to inhibit external disturbance.
Further, the capacitive detection module includes：Resonant element, the resonant element and the frosting detection module
It is connected to form resonant tank；Detection unit, the detection unit are connected with the resonant element, and the detection unit is used to examine
The resonant frequency of the resonant tank is surveyed, and the electricity of the frosting detection module is obtained according to the resonant frequency of the resonant tank
Capacitance detects signal to generate frosting.
Further, the resonant element includes the resonant capacitance and resonant inductance that are connected in parallel, described to be connected in parallel
One end of resonant capacitance and resonant inductance is connected with the first input end of the detection unit, the resonant capacitance being connected in parallel
It is connected with the other end of resonant inductance with the second input terminal of the detection unit, wherein, when at least one frosting senses
When component is connected in series with, one end of at least one frosting inductive component being connected in series with ground connection, be connected in series with it is described extremely
The other end of a few frosting inductive component is connected with one end of the resonant capacitance being connected in parallel and resonant inductance；Alternatively,
When at least one frosting inductive component is connected in parallel, one end of at least one frosting inductive component for being connected in parallel
Ground connection, the other end and the resonant capacitance and resonance being connected in parallel of at least one frosting inductive component being connected in parallel
One end of inductance is connected.
Further, the resonant element is multiple, and each resonant element is connected with corresponding frosting inductive component
To form resonant tank, wherein, each resonant element includes the resonant capacitance and resonant inductance that are connected in parallel, the parallel connection
The resonant capacitance of connection and one end of resonant inductance are connected with the first input end of the detection unit, it is described be connected in parallel it is humorous
The other end of capacitance and resonant inductance of shaking is connected with the second input terminal of the detection unit；Each frosting inductive component
One end is grounded, and the other end of each frosting inductive component and the resonant capacitance being connected in parallel in corresponding resonant element are harmonious
Shake one end of inductance is connected.
Further, the frosting detection device of the air conditioner, further includes：Shield driver, the shield driver
It is connected with the first input end of the detection unit and/or the second input terminal, the shield driver is used for by the detection
The first input end of unit and/or the signal of the second input terminal input are amplified.
Further, the outdoor unit of the air conditioner controller communicates with the capacitive detection module to receive
State frosting detection signal, and according to the frosting detect signal judge the outdoor heat exchanger whether frosting.
One embodiment according to the present utility model, the outdoor controller are further used for, and are examined according to the frosting
It surveys signal and calculates rate of change of capacitance of the capacitance of the frosting detection module in preset time, and in the rate of change of capacitance
The outdoor heat exchanger frosting is judged during more than default change rate.
Further, the outdoor controller is further used for, knot when obtaining the outdoor heat exchanger non-frosting
The initial capacitance value of white detection module, and calculate the difference between the capacitance present value of the frosting detection module and initial capacitance value
Value and according to the mathematic interpolation outdoor heat exchanger current frosting thickness.
Further, the outdoor controller obtains the current frosting thickness of the outdoor heat exchanger according to the following formula
Degree：
Hn=Δs C/K
Wherein, Hn is the current frosting thickness of the outdoor heat exchanger, and Δ C is the capacitance present of the frosting detection module
Difference between value and initial capacitance value, K are by testing the constant obtained.
Further, the capacitive detection module is connected with the outdoor controller by I2C interface module.
In order to achieve the above objectives, the utility model proposes a kind of air conditioner on the other hand, including the air conditioner
Frosting detection device.
According to the utility model proposes air conditioner, can accurately detect the frosting degree of outdoor unit outdoor heat exchanger, prevent
Only the excessive heating capacity for leading to air conditioner of frosting thickness declines, it is ensured that the working efficiency of air conditioner.
Description of the drawings
Fig. 1 is the block diagram according to the frosting detection device of the air conditioner of the utility model embodiment；
Fig. 2 is that frosting inductive component shows in the frosting detection device according to the air conditioner of the utility model one embodiment
It is intended to；
Fig. 3 is frosting inductive component in the frosting detection device according to the air conditioner of the utility model another embodiment
Schematic diagram；
Fig. 4 is the block diagram according to the frosting detection device of the air conditioner of the utility model one embodiment；
Fig. 5 is the block diagram according to the frosting detection device of the air conditioner of the utility model another embodiment；
Fig. 6 is the electricity of capacitive detection module in the frosting detection device according to the air conditioner of the utility model one embodiment
Road schematic diagram；
Fig. 7 is capacitive detection module in the frosting detection device according to the air conditioner of the utility model another embodiment
Circuit diagram；
Fig. 8 is capacitive detection module in the frosting detection device according to the air conditioner of the utility model another embodiment
Circuit diagram；
Fig. 9 is the block diagram according to the frosting detection device of the air conditioner of the utility model another embodiment；With
And
Figure 10 is the flow chart according to the frosting detection method of the air conditioner of the utility model embodiment.
Specific embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that the utility model
Limitation.
First the structure of air conditioner is simply introduced below.
Air conditioner may include indoor unit and outdoor unit, and outdoor unit may include compressor and outdoor heat exchanger, outdoor heat exchanger
Including radiating fin and coil pipe, wherein, coil pipe is connected with compressor, equipped with heat transfer medium in coil pipe, is connected when with coil pipe
Compressor work when, the heat transfer medium in coil pipe is compressed into high temperature and high pressure steam, makes in the air conditioner chamber being connected with coil pipe
The air heat temperature raising of machine.
When winter makes outdoor temperature is relatively low, if the temperature of outdoor heat exchanger is less than the frost point temperature of air, outdoor heat exchange
Device, which will be precipitated moisture and be attached to its surface, forms frost layer, and the temperature difference between the temperature and air themperature of outdoor heat exchanger is got over
Greatly, frosting velocity is faster, and frosting is also more serious.Hot exchange can be prevented in this way, declined so as to cause the heating capacity of air conditioner, it is empty
Adjusting the working efficiency of device reduces.
Based on this, the utility model embodiment proposes a kind of frosting detection device of air conditioner and method and with the dress
The air conditioner put.
Below with reference to the accompanying drawings come describe the utility model embodiment proposition air conditioner frosting detection device and method with
And the air conditioner with the device.
Fig. 1 is the block diagram according to the frosting detection device of the air conditioner of the utility model embodiment.Such as Fig. 1 institutes
Show, which includes：Frosting detection module 10 and capacitive detection module 20.
Wherein, frosting detection module 10 includes at least one frosting inductive component 101, and each frosting inductive component 101 is set
It is placed on the radiating fin or coil pipe of the outdoor heat exchanger of air conditioner, is changed more specifically, frosting inductive component 101 is set to outdoor
The radiating fin of hot device or the outer surface of coil pipe sense the outdoor heat exchanger knot of air conditioner in each frosting inductive component 101
The capacitance of frosting detection module 10 changes when white.
Capacitive detection module 20 is connected with frosting detection module 10, and capacitive detection module 20 is by detecting frosting detection module
10 capacitance detects signal to generate frosting.
It should be noted that according to capacitance principle, the capacitance of capacitance is related to the dielectric constant of capacitance intermediate material, by
This, frosting inductive component 101 is arranged on the radiating fin or coil pipe of the outdoor heat exchanger of air conditioner, the frost of outdoor heat exchanger knot
Or air (during non-frosting) can be as the intermediate material of frosting inductive component 101, the capacitance of frosting inductive component 101 will be with
It the frosting degree of outdoor heat exchanger and changes.
That is, the capacitance of frosting detection module 10 can happen variation with the frosting of outdoor heat exchanger, not
The intermediate material of frosting detection module 10 is air during frosting, and the intermediate material of frosting detection module 10 contains frost during frosting, electricity
The frosting situation of outdoor heat exchanger can accurately be detected by detecting the capacitance of frosting detection module 10 by holding detection module 20.
One embodiment according to the present utility model, when frosting inductive component 101 is multiple, multiple frosting inductive components
101 can be correspondingly arranged multiple positions on outdoor heat exchanger, so as to detect the frosting situation of outdoor heat exchanger different location, into one
Step improves the accuracy of frosting detection.
One embodiment according to the present utility model, as shown in Fig. 2, each frosting inductive component 101 includes first electrode
A1 and second electrode A2, first electrode A1 and second electrode A2 may be contained within the outdoor heat exchanger 40 of air conditioner radiating fin or
On coil pipe.Wherein, the structure of each frosting inductive component 101 is essentially identical, and Fig. 2 is only by taking a frosting inductive component 101 as an example
Explanation.
That is, first electrode A1 and second electrode A2 may make up plane-parallel capacitor, the electricity of first electrode A1 and second
Pole A2 is separated by pre-determined distance and is arranged on the radiating fin or coil pipe of outdoor heat exchanger 40, and air or outdoor heat exchanger 40 dissipate
The frost tied on hot fin or coil pipe can be filled between first electrode A1 and second electrode A2.
According to plane-parallel capacitor capacitance calculation formulaWherein, εrFor the electricity of first electrode A1 and second
The dielectric constant of intermediate material folded by the A2 of pole (air or frost), ε0For vacuum absolute dielectric constant, A is first electrode A1 and second
The face surface area of electrode A 2, d is the distance between first electrode A1 and second electrode A2, in ε0, A and d it is constant in the case of,
The capacitance C of plane-parallel capacitor capacitance only with permittivity εrCorrelation, i.e. C ∝ εr。
As a result, after first electrode A1 and second electrode A2 are set, ε0, A and d remain unchanged, bottom compartment's external heat exchanger 40
After frosting, first electrode A1 and the air folded by second electrode A2 become frost, lead to permittivity εrIt changes.According to above-mentioned
Relational expression C ∝ εr, the capacitance of frosting inductive component 101 changes in 40 frosting of outdoor heat exchanger, and then frosting detects
The capacitance of module 10 changes.
The testing principle of capacitive detection module 20 is described below.
One embodiment according to the present utility model, as shown in figure 5, capacitive detection module 20 includes：201 He of resonant element
Detection unit 202, resonant element 201 are connected to form resonant tank with frosting detection module 10；Detection unit 202 and resonance list
Member 201 is connected, and detection unit 202 is used to detect the resonant frequency of resonant tank, and is obtained according to the resonant frequency of resonant tank
The capacitance of frosting detection module 10 detects signal to generate frosting.
That is, resonant element 201 collectively forms resonant tank with frosting detection module 10, when frosting detection module 10
Capacitance when changing, the resonant frequency of resonant tank changes, and detection unit 202 is by detecting the humorous of resonant tank
Vibration frequency obtains the capacitance of frosting detection module 10 to generate frosting detection signal, and frosting detection signal can be digital signal.
Detection unit 202 can detect the capacitance variation situation of frosting detection module 10 as a result, and can be by capacitance variation situation by mould
Intend signal and be converted to digital signal.
Some embodiments according to the present utility model, as shown in figs 6-8, resonant element 201 include the resonance being connected in parallel
Capacitance C1 and resonant inductance L1, the resonant capacitance C1 being connected in parallel and one end of resonant inductance L1 and the first of detection unit 202
Input terminal is connected, the resonant capacitance C1 and the other end of resonant inductance L1 being connected in parallel and the second input terminal of detection unit 202
It is connected, wherein, as shown in fig. 6, when at least one frosting inductive component 101 is connected in series with, at least one knot for being connected in series with
One end ground connection of white inductive component 101, the other end of at least one frosting inductive component 101 being connected in series with and is connected in parallel
Resonant capacitance C1 is connected with one end of resonant inductance L1；Alternatively, as shown in fig. 7, when at least one frosting inductive component 101 is in parallel
During connection, one end ground connection at least one frosting inductive component 101 being connected in parallel, at least one frosting sensing being connected in parallel
The other end of component 101 is connected with the resonant capacitance C1 being connected in parallel and one end of resonant inductance L1.
Specifically, as shown in fig. 6, at least one frosting inductive component 101 can connect in a series arrangement, for example, first
The first electrode of frosting inductive component is as the one end of at least one frosting inductive component 101 being connected in series with, the second frosting sense
The first electrode of component is answered to be connected with the second electrode of the first frosting inductive component, the first electrode of third frosting inductive component with
The second electrode of second frosting inductive component is connected, and so on, first electrode and the N-1 frostings of N frosting inductive components
The second electrode of inductive component is connected, and the second electrode of N frosting inductive components is as at least one frosting sense being connected in series with
The other end of component 101 is answered, N is positive integer.At least one frosting inductive component 101 being connected in series with as a result, is with being connected in parallel
Resonant capacitance C1 and resonant inductance L1 form resonant tank 60 together, when any one frosting inductive component 101 capacitance occur
During variation, the resonant frequency of resonant tank 60 changes, and detection unit 202 is by detecting the resonant frequency of resonant tank 60 i.e.
The capacitance of frosting detection module 10 can be obtained.
As shown in fig. 7, at least one frosting inductive component 101 can be connected with parallel way, for example, at least one frosting sense
The first electrode of component 101 is answered to be both connected to together as the one end of at least one frosting inductive component 101 being connected in parallel, until
The second electrode of a few frosting inductive component 101 is both connected to together as at least one frosting inductive component being connected in parallel
101 other end.At least one frosting inductive component 101 being connected in parallel as a result, and the resonant capacitance C1 being connected in parallel are harmonious
The inductance L1 that shakes forms resonant tank 60 together, when the capacitance of any one frosting inductive component 101 changes, resonant tank 60
Resonant frequency change, detection unit 202 by detect the resonant frequency of resonant tank 60 can obtain frosting detect mould
The capacitance of block 10.
Another embodiment according to the present utility model, as described in Figure 8, resonant element 201 are multiple, each resonant element
201 are connected to form resonant tank 60 with corresponding frosting inductive component 101, wherein, each resonant element 201 includes in parallel connect
The resonant capacitance C1 and resonant inductance L1 connect, the resonant capacitance C1 and one end and the detection unit of resonant inductance L1 being connected in parallel
202 first input end is connected, and the of the resonant capacitance C1 and the other end of resonant inductance L1 being connected in parallel and detection unit 202
Two input terminals are connected；One end ground connection of each frosting inductive component 101, the other end of each frosting inductive component 101 with it is corresponding
Resonant element 201 in the resonant capacitance C1 that is connected in parallel be connected with one end of resonant inductance L1.
That is, when frosting inductive component 101 for it is multiple when, multiple frosting inductive components 101 can respectively with it is multiple humorous
The unit 201 that shakes, which corresponds to, forms multiple resonant tanks 60, and the first electrode of each frosting inductive component 101 is as frosting inductive component
101 one end, the other end of the second electrode of each frosting inductive component 101 as frosting inductive component 101.It is each as a result,
Frosting inductive component 101 is formed together with the resonant capacitance C1 and resonant inductance L1 that are connected in parallel in corresponding resonant element 201
Resonant tank 60, when the capacitance of some frosting inductive component 101 changes, the frosting inductive component 101 is corresponding humorous
The resonant frequency in circuit 60 of shaking can change, and detection unit 202 is by detecting the resonant frequency of corresponding resonant tank 60 i.e.
The capacitance of the frosting inductive component 101 can be obtained, and then obtains the capacitance of frosting detection module 10.
A specific embodiment according to the present utility model, detection unit 202 can detect resonant capacitance C1 or resonant inductance
The voltage signal or current signal at L1 both ends, and according to voltage signal or the resonance of the frequency acquisition resonant tank 60 of current signal
Frequency.
One embodiment according to the present utility model, as shown in Figures 3 and 4, each frosting inductive component 101 include the first screen
Cover cable 102 and secondary shielding cable 103, the first shielded cable 102 and secondary shielding cable 103 respectively with first electrode A1 and
Second electrode A2, which is corresponded to, to be connected, to inhibit external disturbance, more specifically, the first shielded cable 102 and secondary shielding cable 103 divide
The connecting pin of first electrode A1 and second electrode A2 Dui Ying be series at, for example, by taking Fig. 8 as an example, first electrode A1 can lead to
It crosses the first shielded cable 102 to be grounded, second electrode A2 can be single by detecting in secondary shielding cable 103 and capacitive detection module 20
The first input end of member 202 is connected.
Parasitic capacitance between detection unit and the earth can be eliminated by shielded cable as a result, effectively reduce external disturbance.
Further, as shown in figure 4, the frosting detection device of air conditioner further includes：Shield driver 30, shield driver
30 are connected with the first input end of detection unit 202 and/or the second input terminal, and shield driver 30 is used for by detection unit
202 first input end and/or the signal of the second input terminal input are amplified.That is, with shield driver 30 and inspection
For the first input end of survey unit 202 is connected, shield driver 30 can be 1 amplifying circuit by external gain to being input to inspection
The signal for surveying the first input end of unit 202 is driven amplification, and amplified signal is introduced the first of detection unit 202
Input terminal.
Further, some embodiments according to the present utility model, as Figure 6-9, outdoor unit of the air conditioner controller
50 communicate with capacitive detection module 20 to receive frosting detection signal, and detect signal according to frosting and judge outdoor heat exchanger
Whether frosting.
That is, capacitive detection module 20 is converted the capacitance variation situation of frosting detection module 10 by analog signal
To send outdoor controller 50 after digital signal (frosting detection signal) to, outdoor controller 50 is examined by monitoring frosting
Survey signal can determine whether outdoor heat exchanger whether frosting.
A specific embodiment according to the present utility model, outdoor controller 50 are further used for, are detected according to frosting
Signal calculates rate of change of capacitance of the capacitance of frosting detection module 10 in preset time, and is more than in rate of change of capacitance and presets
Outdoor heat exchanger frosting is judged during change rate.
That is, outdoor controller 50 can receive frosting detection signal every preset time T, with every preset time
Sample the capacitance of frosting detection module 10, capacitive detection module 20 can will generate in outdoor heat exchanger Frost formation process as a result,
Multiple capacitances (such as C1, C2 ..., Cn ...) transmission outdoor controller 50.Outdoor controller 50 can be by detecting electricity
Rate of change of capacitance of the capacitance in preset time i.e. can determine whether outdoor heat exchanger whether frosting.
Wherein, the difference that rate of change of capacitance of the capacitance in preset time can be between two neighboring capacitance is with presetting
The ratio between time T, i.e., difference DELTA Cn=Cn-Cn-1, rate of change of capacitance D=Δs C1/T between two neighboring capacitance.
Further, one embodiment according to the present utility model, outdoor controller 50 can also detect mould according to frosting
Rate of change of capacitance of the capacitance of block 10 in preset time determines that the time of frosting occurs for outdoor heat exchanger, that is to say, that pre-
If time T is fixed value, when the change rate of n-th of capacitance Cn and (n-1)th capacitance Cn-1 in preset time is more than in advance
If during change rate, judge outdoor heat exchanger occur frosting, can determine at this time outdoor heat exchanger occur frosting time for Tn=T ×
n。
One embodiment according to the present utility model, outdoor controller 50 are further used for, and obtain outdoor heat exchanger not
The initial capacitance value of frosting detection module 10 during frosting, and calculate the capacitance present value of frosting detection module 10 and initial capacitance value
Between difference and the current frosting thickness according to mathematic interpolation outdoor heat exchanger.
A specific embodiment according to the present utility model, outdoor controller 50 obtain outdoor heat exchange according to the following formula
The current frosting thickness of device：
Hn=Δs C/K
Wherein, Hn is the current frosting thickness of outdoor heat exchanger, Δ C be frosting detection module capacitance present value with it is initial
Difference between capacitance, K are by testing the constant obtained.
That is, intermediate material folded by frosting inductive component is air when outdoor heat exchanger non-frosting, can obtain at this time
Take the initial capacitance value i.e. C0 of frosting detection module 10, corresponding frosting thickness H0=0, the frosting sense when outdoor heat exchanger frosting
Intermediate material folded by component is answered to contain frost, the capacitance of frosting detection module 10 changes, and outdoor controller 50 is logical as a result,
The current of outdoor heat exchanger can be obtained by crossing the difference calculated between the capacitance present value of frosting detection module 10 and initial capacitance value
Frosting thickness, i.e. Hn=Δs C/K.
One embodiment according to the present utility model, as Figure 6-9, capacitive detection module 20 and outdoor controller 50
It is connected by I2C interface module 70.That is, capacitive detection module 20 can pass through I2C interface mould with outdoor controller 50
Block 70 communicates.
In addition, outdoor controller 50 is additionally operable to obtain the temperature and outdoor environment temperature of outdoor heat exchanger, and according to room
The temperature and outdoor environment temperature of external heat exchanger and the frosting thickness control air of outdoor heat exchanger are defrosted or stop removing
Frost.
Specifically, outdoor controller 50 is further used for, and judges whether the frosting thickness of outdoor heat exchanger meets first
Defrost starts the temperature of condition and outdoor heat exchanger and whether outdoor environment temperature meets the second defrost and start condition, and in room
The frosting thickness of external heat exchanger meets that the first defrost starts the temperature of condition and outdoor heat exchanger and outdoor environment temperature meets the
When two defrosts start condition, control air conditioner defrosts.Wherein, the first defrost, which starts condition, may include the knot of outdoor heat exchanger
Frost thickness are more than the first preset thickness；Second defrost, which starts condition, may include that the temperature of outdoor heat exchanger is less than or equal to the first temperature
It spends threshold value and outdoor environment temperature is less than second temperature threshold value.
Specifically, outdoor controller 50 is further used for, and judges whether the frosting thickness of outdoor heat exchanger meets first
Whether the temperature and outdoor environment temperature of defrost termination condition and outdoor heat exchanger meet the second defrost termination condition, and in room
The temperature and outdoor environment temperature that the frosting thickness of external heat exchanger meets the first defrost termination condition and outdoor heat exchanger meet the
During two defrost termination conditions, control air conditioner stops defrosting.Wherein, the first defrost termination condition may include the knot of outdoor heat exchanger
Frost thickness are less than or equal to the second preset thickness, and the second preset thickness is less than the first preset thickness；Second defrost starts condition can
Temperature including outdoor heat exchanger is more than third temperature threshold, and third temperature threshold is more than the first temperature threshold.
To sum up, the frosting detection device of the air conditioner proposed according to the utility model embodiment, in dissipating for outdoor heat exchanger
Setting includes the frosting detection module of at least one frosting inductive component on hot fin or coil pipe, in each frosting inductive component sense
The capacitance of frosting detection module changes when should arrive the outdoor heat exchanger frosting of air conditioner, and capacitive detection module passes through detection
The capacitance of frosting detection module is to generate frosting detection signal, so as to accurately detect the frosting of outdoor unit outdoor heat exchanger
Degree prevents the excessive heating capacity for leading to air conditioner of frosting thickness from declining, it is ensured that the working efficiency of air conditioner.
The utility model embodiment also proposed a kind of air conditioner, the frosting detection dress of the air conditioner including above-described embodiment
It puts.
According to the air conditioner that the utility model embodiment proposes, the frosting journey of outdoor unit outdoor heat exchanger can be accurately detected
Degree, prevents the excessive heating capacity for leading to air conditioner of frosting thickness from declining, it is ensured that the working efficiency of air conditioner.
The utility model embodiment has also been proposed a kind of frosting detection method of air conditioner.
Figure 10 is the flow chart according to the frosting detection method of the air conditioner of the utility model embodiment.Air conditioner includes knot
White detection module, frosting detection module include at least one frosting inductive component, and each frosting inductive component is set to air conditioner
Outdoor heat exchanger radiating fin or coil pipe on, sense the outdoor heat exchanger frosting of air conditioner in each frosting inductive component
When frosting detection module capacitance change.
As shown in Figure 10, detection method includes the following steps for the frosting of the air conditioner of the utility model embodiment：
S1：Obtain the capacitance variations situation of frosting detection module.
S2：By detecting the capacitance of frosting detection module signal is detected to generate frosting.
One embodiment according to the present utility model, air conditioner further include resonant element, and resonant element detects mould with frosting
Block is connected to form resonant tank, is included by detecting the capacitance of frosting detection module with generating frosting detection signal：Detection
The resonant frequency of resonant tank；The capacitance of frosting detection module is obtained according to the resonant frequency of resonant tank to generate frosting inspection
Survey signal.
One embodiment according to the present utility model, the frosting detection method of air conditioner further include：
According to frosting detect signal judge outdoor heat exchanger whether frosting.
One embodiment according to the present utility model, according to frosting detect signal judge outdoor heat exchanger whether frosting packet
It includes：Signal is detected according to frosting and calculates rate of change of capacitance of the capacitance of frosting detection module in preset time；When capacitance becomes
Rate judges outdoor heat exchanger frosting when being more than default change rate.
One embodiment according to the present utility model, the frosting detection method of air conditioner further include：Obtain outdoor heat exchanger
The initial capacitance value of frosting detection module during non-frosting；It calculates between the capacitance present value of frosting detection module and initial capacitance value
Difference；According to the current frosting thickness of mathematic interpolation outdoor heat exchanger.
One embodiment according to the present utility model obtains the current frosting thickness of outdoor heat exchanger according to the following formula：
Hn=Δs C/K
Wherein, Hn is the current frosting thickness of outdoor heat exchanger, Δ C be frosting detection module capacitance present value with it is initial
Difference between capacitance, K are by testing the constant obtained.
According to the frosting detection method for the air conditioner that the utility model embodiment proposes, in the radiating fin of outdoor heat exchanger
Or setting includes the frosting detection module of at least one frosting inductive component on coil pipe, and sky is sensed in each frosting inductive component
The capacitance of frosting detection module changes when adjusting the outdoor heat exchanger frosting of device, by the capacitance for detecting frosting detection module
Value, so as to accurately detect the frosting degree of outdoor unit outdoor heat exchanger, prevents frosting thickness to generate frosting detection signal
The excessive heating capacity for leading to air conditioner declines, it is ensured that the working efficiency of air conditioner.
In the description of the present invention, it is to be appreciated that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable
The orientation or position relationship of the instructions such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " are based on orientation shown in the drawings
Or position relationship, be for only for ease of description the utility model and simplify description rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limit to the utility model
System.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature." multiple " are meant that at least two, such as two in the description of the present invention,
It is a, three etc., unless otherwise specifically defined.
In the utility model unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be
Mechanical connection or electrical connection；It can be directly connected, can also be indirectly connected by intermediary, can be two
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In the utility model unless specifically defined or limited otherwise, fisrt feature is "above" or "below" second feature
Can be that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be fisrt feature right over second feature or oblique upper or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
It is fisrt feature immediately below second feature or obliquely downward or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It combines in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the different embodiments or examples described in this specification and the feature of different embodiments or examples into
Row combines and combination.
Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it is impossible to be construed as a limitation of the present invention, those of ordinary skill in the art are in the scope of the utility model
It is interior to make changes, modifications, substitutions and variations to the above described embodiments.
Claims (10)
1. a kind of frosting detection device of air conditioner, which is characterized in that including：
Frosting detection module, the frosting detection module include at least one frosting inductive component, each frosting sense group
Part is set on the radiating fin or coil pipe of the outdoor heat exchanger of the air conditioner, is sensed in each frosting inductive component
The capacitance of the frosting detection module changes during the outdoor heat exchanger frosting of the air conditioner；
Capacitive detection module, the capacitive detection module are connected with the frosting detection module, and the capacitive detection module passes through
The capacitance of the frosting detection module is detected to generate frosting detection signal.
2. the frosting detection device of air conditioner according to claim 1, which is characterized in that each frosting inductive component
Including first electrode and second electrode, the first electrode and second electrode may be contained within the outdoor heat exchanger of the air conditioner
On radiating fin or coil pipe.
3. the frosting detection device of air conditioner according to claim 2, which is characterized in that each frosting inductive component
Including the first shielded cable and secondary shielding cable, first shielded cable and secondary shielding cable are electric with described first respectively
Pole is connected with second electrode correspondence, to inhibit external disturbance.
4. the frosting detection device of air conditioner according to claim 1, which is characterized in that the capacitive detection module packet
It includes：
Resonant element, the resonant element are connected to form resonant tank with the frosting detection module；
Detection unit, the detection unit are connected with the resonant element, and the detection unit is used to detect the resonant tank
Resonant frequency, and the capacitance of the frosting detection module is obtained to generate frosting according to the resonant frequency of the resonant tank
Detect signal.
5. the frosting detection device of air conditioner according to claim 4, which is characterized in that the resonant element includes parallel connection
One end of the resonant capacitance and resonant inductance of connection, the resonant capacitance being connected in parallel and resonant inductance and the detection unit
First input end be connected, the other end of the resonant capacitance being connected in parallel and resonant inductance and the second of the detection unit
Input terminal is connected, wherein,
When at least one frosting inductive component is connected in series with, at least one frosting inductive component for being connected in series with
One end is grounded, the other end of at least one frosting inductive component being connected in series with and the resonant capacitance being connected in parallel and
One end of resonant inductance is connected；
Alternatively, when at least one frosting inductive component is connected in parallel, at least one frosting being connected in parallel senses
One end ground connection of component, the other end and the resonance being connected in parallel of at least one frosting inductive component being connected in parallel
Capacitance is connected with one end of resonant inductance.
6. the frosting detection device of air conditioner according to claim 4, which is characterized in that the resonant element to be multiple,
Each resonant element is connected with corresponding frosting inductive component to form resonant tank, wherein,
Each resonant element includes the resonant capacitance and resonant inductance that are connected in parallel, the resonant capacitance being connected in parallel and
One end of resonant inductance is connected with the first input end of the detection unit, the resonant capacitance and resonant inductance being connected in parallel
The other end be connected with the second input terminal of the detection unit；
One end ground connection of each frosting inductive component, the other end and corresponding resonance list of each frosting inductive component
The resonant capacitance being connected in parallel in member is connected with one end of resonant inductance.
7. the frosting detection device of air conditioner according to claim 5 or 6, which is characterized in that further include：
Shield driver, the shield driver are connected with the first input end of the detection unit and/or the second input terminal, institute
Signal of the shield driver for the first input end by the detection unit and/or the input of the second input terminal is stated to put
Greatly.
8. the frosting detection device of air conditioner according to claim 1, which is characterized in that the outdoor unit of the air conditioner control
Device processed is communicated with the capacitive detection module to receive the frosting detection signal, and is detected signal according to the frosting and sentenced
Break the outdoor heat exchanger whether frosting.
9. the frosting detection device of air conditioner according to claim 8, which is characterized in that the capacitive detection module and institute
Outdoor controller is stated by I2C interface module to be connected.
A kind of 10. air conditioner, which is characterized in that the frosting inspection including the air conditioner according to any one of claim 1-9
Survey device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2017/091348 WO2018205388A1 (en) | 2017-05-10 | 2017-06-30 | Air conditioner, and control device and method for air conditioner |
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| CN201710326500 | 2017-05-10 | ||
| CN2017103265008 | 2017-05-10 |
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| CN201720550920.XU Active CN207585020U (en) | 2017-05-10 | 2017-05-17 | Air conditioner and its frosting detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989494A (en) * | 2017-05-10 | 2017-07-28 | 广东美的制冷设备有限公司 | Air conditioner and its frosting detection device and method |
| CN116697875A (en) * | 2023-08-07 | 2023-09-05 | 湖南大学 | Heat pump frost monitoring system based on electrical characteristics and defrosting method thereof |
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| CN107355953B (en) * | 2017-08-02 | 2023-11-28 | 广东美的制冷设备有限公司 | Dust accumulation detection device and method, air conditioner, home system and storage medium |
| CN107940701B (en) * | 2017-11-01 | 2020-10-09 | 广东美的制冷设备有限公司 | Condensation detection method, condensation sensor and air conditioner |
| CN108007050B (en) * | 2017-11-21 | 2020-04-03 | 合肥美的电冰箱有限公司 | Defrosting control method of refrigerator, refrigerator and computer readable storage medium |
| CN109059356B (en) * | 2018-07-20 | 2021-04-09 | 广东美的制冷设备有限公司 | Heat exchanger frosting detection device, heat exchanger, air conditioner and defrosting control method of air conditioner |
| CN109059355B (en) * | 2018-07-20 | 2021-02-26 | 广东美的制冷设备有限公司 | Heat exchanger frosting detection device, heat exchanger, air conditioner and defrosting control method of air conditioner |
| CN109974571A (en) * | 2018-12-24 | 2019-07-05 | 天津天商酷凌科技有限公司 | A kind of condenser type multiple-effect frost sensor that evaporator has |
| CN114153172B (en) * | 2021-12-08 | 2022-09-13 | 中山东菱威力电器有限公司 | Induction type flushing triggering control method and device |
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| JP2822705B2 (en) * | 1991-08-02 | 1998-11-11 | 松下電器産業株式会社 | Defrost control device for heat pump type air conditioner |
| WO2008108757A1 (en) * | 2007-03-06 | 2008-09-12 | Carrier Corporation | Micro-channel evaporator with frost detection and control |
| KR101212697B1 (en) * | 2007-06-14 | 2012-12-18 | 엘지전자 주식회사 | Air conditioner and Control method of the same |
| CN201514223U (en) * | 2009-09-23 | 2010-06-23 | 珠海格力电器股份有限公司 | Frost detection device and heat pump type air conditioner |
| KR20120022315A (en) * | 2010-09-02 | 2012-03-12 | 삼성전자주식회사 | Cooling system and method for controlling defrost thereof |
| JP2012098044A (en) * | 2010-10-29 | 2012-05-24 | Mitsubishi Electric Corp | Dew formation detecting device and method, and air conditioner |
| CN102095295B (en) * | 2011-02-24 | 2012-07-04 | 哈尔滨工业大学 | Defrosting detector and defrosting control method based on frost layer thickness |
| KR101916424B1 (en) * | 2012-02-28 | 2018-11-07 | 엘지전자 주식회사 | Air conditioner and method for controlling the same |
| CN103512103A (en) * | 2012-06-29 | 2014-01-15 | 太仓南极风能源设备有限公司 | Frost sensing device of outdoor unit of air-conditioner |
| CN202993470U (en) * | 2012-11-30 | 2013-06-12 | 深圳市深越光电技术有限公司 | Condenser frosting detection device |
| CN106989494A (en) * | 2017-05-10 | 2017-07-28 | 广东美的制冷设备有限公司 | Air conditioner and its frosting detection device and method |
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- 2017-05-17 CN CN201710348811.4A patent/CN106989494A/en active Pending
- 2017-05-17 CN CN201720550920.XU patent/CN207585020U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989494A (en) * | 2017-05-10 | 2017-07-28 | 广东美的制冷设备有限公司 | Air conditioner and its frosting detection device and method |
| CN116697875A (en) * | 2023-08-07 | 2023-09-05 | 湖南大学 | Heat pump frost monitoring system based on electrical characteristics and defrosting method thereof |
| CN116697875B (en) * | 2023-08-07 | 2023-10-13 | 湖南大学 | Heat pump frost monitoring system based on electrical characteristics and defrosting method thereof |
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| CN106989494A (en) | 2017-07-28 |
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