CN106289038B - Ice maker ice thickness detection circuit and detection method - Google Patents
Ice maker ice thickness detection circuit and detection method Download PDFInfo
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- CN106289038B CN106289038B CN201610829794.1A CN201610829794A CN106289038B CN 106289038 B CN106289038 B CN 106289038B CN 201610829794 A CN201610829794 A CN 201610829794A CN 106289038 B CN106289038 B CN 106289038B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
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Abstract
The invention discloses a kind of ice maker ice thickness detection circuit and detection method, the detection circuit includes: at least two probes, and each probe is configured as fixing according to position corresponding with ice layer thickness；Pulse signal output circuit is connect with the probe in the probe as signal input probe by lead；Feedback signal receives circuit, is connect with the probe in the probe as signal output probe by lead, receives the feedback signal that the pulse signal exports after the probe as signal input probe and the probe as signal output probe；Ice thickness decision circuit determines ice thickness for the amplitude and probe of amplitude, the feedback signal according at least to the pulse signal and the corresponding relationship of ice layer thickness.With the application of the invention, realizing the direct detection to ice thickness, the accuracy and reliability detected to ice thickness is improved.
Description
Technical field
The invention belongs to ice maker technologies, specifically, being to be related to ice maker ice thickness detection circuit and detection
Method.
Background technique
On refrigeration mode water dispenser or other similar devices with ice maker, due to the needs of refrigeration, it usually needs
Certain thickness ice is kept to ensure that refrigeration effect is best, therefore, it is necessary to detect refrigerator pipes (being equivalent to evaporator) nearby to freeze
Thickness.
The thickness of traditional technology means not instead of not directly detection ice, using the method for temperature detection, when temperature reaches one
When definite value, it is believed that and thickness is met the requirements, and stops refrigeration.This method control is easy to appear two problems:
First is that due to the deviation of sensor and a variety of causes of water itself, it may appear that the case where cannot freezing；
Second is that due to the deviation of sensor and a variety of causes of water itself, it may appear that the feelings that entire cold water chamber all freezes
Condition；
And both of these case can all seriously affect user and use ice water.
Summary of the invention
The object of the present invention is to provide a kind of ice maker ice thickness detection circuits and detection method, using resistance measurement
Means realize the direct detection of ice thickness, improve the accuracy and reliability detected to ice thickness.
For achieving the above object, ice maker provided by the invention uses following technical sides with ice thickness detection circuit
Case is achieved:
A kind of ice maker ice thickness detection circuit, the detection circuit include:
At least two probes, each probe is respectively connected with lead, and each probe is configured as according to known
, corresponding with ice layer thickness position fixes；
Pulse signal output circuit is connect with the probe in the probe as signal input probe by lead,
The pulse signal is transmitted to the probe as signal input probe；
Feedback signal receives circuit, is connect, is received by lead with the probe in the probe as signal output probe
The pulse signal is after the probe as signal input probe and the probe as signal output probe
The feedback signal of output；
Ice thickness decision circuit, the alternating-current pulse for being exported according at least to the pulse signal output circuit
The amplitude of signal, the amplitude of the feedback signal reception received feedback signal of circuit and probe are corresponding with ice layer thickness
Relationship determines ice thickness.
Detection circuit as described above, the detection circuit further include:
The temperature for detecting the temperature of the ice maker, and is transmitted to the ice thickness by temperature sensing circuit
Decision circuit；
The exchange that the ice thickness decision circuit is exported according to the temperature, the pulse signal output circuit
The amplitude of pulse signal, the amplitude of the feedback signal reception received feedback signal of circuit and the probe and ice sheet are thick
The corresponding relationship of degree determines ice thickness.
Detection circuit as described above, the detection circuit further include:
Communicating circuit is connect, for externally exporting sentencing for the ice thickness decision circuit with the ice thickness decision circuit
Determine result.
Detection circuit as described above, the alternating current output of pulse signal circuit include:
Positive output terminal exports the positive pulse signal of certain frequency；
Negative output terminal exports the undersuing of the certain frequency；
Capacitance, one end are connect with the positive output terminal；
Divider resistance, one end are connect with the negative output terminal, and the other end is connect with the other end of the capacitance；
Probe in the probe as signal input probe is connected to the capacitance and the partial pressure by lead
Between resistance.
Detection circuit as described above, the ice thickness decision circuit include:
Signal amplitude processing unit, the amplitude of amplitude and the feedback signal for the pulse signal,
Determine that the feedback signal changes relative to the amplitude of the pulse signal；
Resistance determination unit changes for the amplitude according at least to the feedback signal relative to the pulse signal
Determine the resistance between the probe as signal input probe and the probe as signal output probe；
Ice thickness determination unit judges described defeated as signal for the resistance according to determined by the resistance determination unit
Whether the medium entered between the probe of probe and the probe as signal output probe is ice, and is inputted according to as signal
The corresponding relationship of the probe of probe and the probe and ice layer thickness for exporting probe as signal determines ice thickness.
To realize aforementioned invention purpose, ice maker provided by the invention uses following technical sides with ice thickness detection method
Case is achieved:
A kind of ice maker ice thickness detection method, which comprises
To the probe transmission alternating current pulse signal as signal input probe；
Pulse signal export as the probe of signal output probe, described is obtained to visit through described input as signal
Feedback signal after the probe of needle and the probe as signal output probe；
According at least to pair of the amplitude of the pulse signal, the amplitude of the feedback signal and probe and ice layer thickness
It should be related to judgement ice thickness；
The probe at least two, and all probes are configured as according to position known, corresponding with ice layer thickness
It sets and fixes.
Detection method as described above, the method also includes:
Detect the temperature of ice maker；
According to the temperature, the amplitude of the pulse signal, the amplitude of the feedback signal and the probe and ice
The corresponding relationship of thickness degree determines ice thickness.
Detection method as described above, according to the amplitude of the pulse signal, the amplitude and spy of the feedback signal
The corresponding relationship of needle and ice layer thickness determines ice thickness, specifically includes:
Compare the amplitude of the pulse signal and the amplitude of the feedback signal, determines that the feedback signal is opposite
Change in the amplitude of the pulse signal；
Determine that the conduct signal is defeated relative to the amplitude variation of the pulse signal according to the feedback signal
Enter the resistance between the probe of probe and the probe as signal output probe；
The probe as signal input probe and the spy as signal output probe are judged according to the resistance
Whether the medium between needle is ice, and according to the probe and the probe as signal output probe as signal input probe
Ice thickness is determined with the corresponding relationship of ice layer thickness.
Detection method as described above judges the probe and the work as signal input probe according to the resistance
Whether the medium exported between the probe of probe for signal is ice, and according to the probe and the conduct for inputting probe as signal
The probe of signal output probe and the corresponding relationship of ice layer thickness determine ice thickness, specifically include:
One described as the probe composition one as signal output probe of the probe of signal input probe and one
Group probe groups, include probe groups described in multiple groups, probe groups described in multiple groups according to the refrigerator pipes in the refrigerating plant away from
It is fixed from sequence from the near to the distant, and at a distance from the refrigerator pipes and the ice layer thickness is corresponding；
According to the sequence at a distance from the refrigerator pipes from the near to the distant, successively judged in the probe groups according to the resistance
Whether the probe as signal input probe and the medium between the probe as signal output probe are ice, are found described in distance
A farthest medium of refrigerator pipes is the probe groups of ice；
According to the probe and ice layer thickness that a medium farthest apart from the refrigerator pipes is in the probe groups of ice
Corresponding relationship determines ice thickness.
Detection method as described above, according to the sequence at a distance from the refrigerator pipes from the near to the distant, according to the resistance
Successively judge the probe as signal input probe and the medium between the probe as signal output probe in the probe groups
Whether it is ice, finds the probe groups that a medium farthest apart from the refrigerator pipes is ice；According to described apart from the refrigerator pipes
A farthest medium is that the corresponding relationship of the probe and ice layer thickness in the probe groups of ice determines ice thickness；It specifically includes:
According to the sequence at a distance from the refrigerator pipes from the near to the distant, successively judged in the probe groups according to the resistance
Whether the probe as signal input probe and the medium between the probe as signal output probe are ice；
Find the probe groups that first medium is not ice；
Judge that first medium is not the medium in the subsequent all probe groups of probe groups of ice between two probes
It whether is not ice；
If first medium is not that the medium in the subsequent all probe groups of probe groups of ice between two probes is equal
It is not ice, it is farthest apart from the refrigerator pipes not to be that probe groups adjacent before the probe groups of ice are determined as first medium
A medium be ice probe groups, be the spy in the probe groups of ice according to a medium farthest apart from the refrigerator pipes
The corresponding relationship of needle and ice layer thickness determines ice thickness；
If first medium is not that the medium in the subsequent all probe groups of probe groups of ice between two probes has
Ice, finding next medium not is the probe groups of ice, continues to judge, until determining Jie farthest apart from the refrigerator pipes
Matter is the probe groups of ice, and is the probe and ice in the probe groups of ice according to a medium farthest apart from the refrigerator pipes
The corresponding relationship of thickness degree determines ice thickness.
Compared with prior art, the advantages and positive effects of the present invention are: ice thickness detection circuit provided by the invention and
In detection method, by the way that probe corresponding with ice layer thickness is arranged, obtained and applying pulse signal to probe
Feedback signal judges whether the medium of probe present position is ice, realizes the direct detection to ice thickness, and detection means is simple
Easy, the reliability and accuracy of testing result are higher.
After a specific embodiment of the invention is read in conjunction with the figure, the other features and advantages of the invention will become more clear
Chu.
Detailed description of the invention
Fig. 1 is the functional block diagram based on ice maker ice thickness detection circuit one embodiment of the present invention；
Fig. 2 is the functional block diagram based on second embodiment of ice maker ice thickness detection circuit of the present invention；
Fig. 3 is the circuit diagram based on ice maker ice thickness detection circuit third embodiment of the present invention；
Fig. 4 is the flow chart based on ice maker ice thickness detection method one embodiment of the present invention；
Fig. 5 is the flow chart based on second embodiment of ice maker ice thickness detection method of the present invention；
Fig. 6 is the probe arragement construction figure based on ice maker ice thickness detection method third embodiment of the present invention；
Fig. 7 is the probe arragement construction figure based on the 4th embodiment of ice maker ice thickness detection method of the present invention；
Fig. 8 is the probe arragement construction figure based on the 5th embodiment of ice maker ice thickness detection method of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to drawings and examples,
Invention is further described in detail.
Firstly, the brief description present invention realizes the basic principle of ice maker ice thickness detection:
Studied and tested discovery, resistance (conductivity) difference of ice and water is larger.For certain thickness water, Huo Zheshui
With the mixture of ice, resistance is several kilohms to more than 100 kilohms；And for the ice of same thickness, resistance will increase several million
Ohm.Based on the principle, it may be considered that determine whether some position is ice by way of measuring resistance.The measurement of resistance can be with
It is characterized by the attenuation amplitude between input signal and output signal.And it is thick by predicting ice sheet corresponding to some position
Degree, then may be implemented the detection to ice thickness.
Referring to Figure 1, which show based on ice maker ice thickness detection circuit one embodiment of the present invention
Functional block diagram.
As shown in Figure 1, the detection circuit of the embodiment includes pulse signal output circuit 11, probe 12, feedback
13 grades of ice thickness decision circuits 14 of signal receiving circuit.Wherein, probe 12 includes at least two, can correspond at least one
Ice thickness, and probe 12 includes the probe as signal input probe and the probe as signal output probe.Each probe
12 are respectively connected with lead, and each probe 12 is configured as fixing according to position known, corresponding with ice layer thickness.Exchange
Output of pulse signal circuit 11 is connect with the probe in probe 12 as signal input probe by the lead of the probe, will be exchanged
Pulse signal transmission inputs the probe of probe to this as signal.Feedback signal, which receives, is used as signal in circuit 13, with probe 12
The probe of output probe is connected by the lead, receives the pulse signal of the output of pulse signal output circuit 11 through making
The probe of probe is inputted for signal and the feedback signal exported after the probe of probe is exported as signal.Ice thickness decision circuit
14, amplitude, the feedback signal of the pulse signal for being exported according to pulse signal output circuit 11 receive circuit 13
The amplitude and probe 12 of received feedback signal and the corresponding relationship of ice layer thickness determine ice thickness.
As described by preceding basic principle, by multiple probes in probe 12 in advance according to known, opposite with ice layer thickness
The position answered is fixed.Typically, it is near the refrigerator pipes being fixed in refrigerating plant, it is spaced apart with refrigerator pipes.It lifts
For example, if there are two probes, two probes are arranged in the same side of refrigerator pipes according to the mode parallel with refrigerator pipes, and
Two probe separation certain distance settings, one close apart from refrigerator pipes, another refrigerator pipes is remote.So, farthest probe and system
The distance between cold pipe is exactly the ice thickness that can determine using two probes.Moreover, because pulse signal is applied to
On a probe as signal input probe, then, the feedback exported from another probe as signal output probe
Signal will be the relevant signal of medium between the pulse signal of input and two probes, specifically with two
The relevant signal of the resistance of medium between a probe.And since the size of resistance has reacted the difference of medium, then ice thickness
The amplitude and feedback signal for the pulse signal that degree decision circuit 14 is exported according to pulse signal output circuit 11 receive
The amplitude of the received feedback signal of circuit 13 can judge whether the medium between two probes is ice.In conjunction with probe and ice
The corresponding relationship of thickness degree can determine ice thickness.Moreover, using the detection circuit of the embodiment by then passing through detection ice
Parameter realize direct detection to ice thickness, the reliability and accuracy of testing result are higher, and detection circuit structure is simple,
It is easy to accomplish.
Fig. 2 is referred to, which show based on second embodiment of ice maker ice thickness detection circuit of the present invention
Functional block diagram.
As shown in Fig. 2, the detection circuit of the embodiment includes pulse signal output circuit 21, probe 22, feedback
Signal receiving circuit 23, ice thickness decision circuit 24, temperature sensing circuit 25 and communicating circuit 26.Pulse signal output electricity
Connection relationship and function between road 21, probe 22 and feedback signal reception circuit 23 is similar with Fig. 1 embodiment, can refer to Fig. 1
The description of embodiment.And temperature sensing circuit 25 is used to detect the temperature of ice maker, and temperature is transmitted to ice thickness and is determined
Circuit 24；Communicating circuit 26 is connect with ice thickness decision circuit 24, for externally exporting the judgement knot of ice thickness decision circuit 24
Fruit, for example, determining result to host computer or monitor terminal transmission.It is big primarily directed to temperature change that temperature sensing circuit 25 is set
Refrigerating plant, correction is compensated to testing result by temperature, is reduced because temperature change influences the mistake of dielectric resistance variation
Difference.For communicating circuit 26, selection communicating circuit structure commonly used in the prior art can according to need, for example, using UART
Deng.
Moreover, including sequentially connected signal amplitude processing unit 241, the determining list of resistance for ice thickness decision circuit 24
First 242 grades of ice thickness determination units 243.Wherein, signal amplitude processing unit 241 is for comparing pulse signal output circuit
The amplitude and feedback signal of the pulse signal of 21 outputs receive the amplitude for the feedback signal that circuit 23 exports, and determine to feed back
Signal changes relative to the amplitude of pulse signal.Resistance determines what Unit 242 were used to export according to temperature sensing circuit 25
The feedback signal that temperature and signal amplitude processing unit 241 export determines conduct relative to the amplitude variation of pulse signal
Signal inputs the probe of probe and as the resistance between the probe of signal output probe.And ice thickness determination unit 243 is used for
According to the judgement of resistance determined by resistance determination unit 242 as the probe of signal input probe and as signal output probe
Whether the medium between probe is ice, and according to as signal input probe probe and as signal output probe probe with
The corresponding relationship of ice layer thickness determines ice thickness.
If resistance is true for should be understood that the ice thickness detection circuit for not having temperature sensing circuit 25
Order member 242 only needs to determine to input probe as signal relative to the amplitude variation of pulse signal based on the feedback signal
Probe and as signal output probe probe between resistance.
Fig. 3 is referred to, is based on ice maker ice thickness detection circuit third embodiment of the present invention shown in the figure
Circuit diagram.
As schematically shown in Figure 3, integrated chip of the IC1 as detection circuit core realizes that original signal output, feedback signal are adopted
Collection, feedback signal processing, ice thickness judgement and the output for determining result etc..
CN1 is communicating circuit and power supply circuit interface.There are two communicating circuits, and one is and the UART port as IC1
The UART communication interface that P01 terminal and P02 terminal are formed, the other is the triode being connect with an I/O port P16 terminal of IC1
N1 is formed by pulse width communication interface.One of communication modes can be selected according to actual needs
CN2 is the connector interface of probe, and the lead of probe is connected on interface CN2, and then passes through CN2 and IC1
Connection.
NTC1 is temperature sensor interface, and the temperature sensor of detection ice maker temperature passes through the interface and corresponding temperature
Spend the temperature acquisition terminal AIN16 connection of Acquisition Circuit and IC1.
Positive output terminal of the P10 mouth of IC1 as pulse signal output circuit exports the positive pulse letter of certain frequency
Number, and the P11 mouthfuls of negative output terminals as pulse signal output circuit, export the undersuing of same frequency.Blocking electricity
Hold the conditioning circuit that C3 and divider resistance R6 constitute pulse signal, the one end C3 is connect with positive output terminal P10, the other end and
One end of divider resistance R6 connects, and the other end of divider resistance R6 is connect with negative output terminal P11.In capacitance C3 and partial pressure
Pulse signal will be exported between resistance R6, the probe as signal input probe is connected to CN2 by lead within the probe
It on interface, and then is connected between capacitance C3 and divider resistance R6, to obtain pulse signal input.By using friendship
Input signal of the signal pulse stream as probe, can be to avoid the water in refrigerating plant detected is polarized and influences detection standard
The problem of true property.
The P20 terminal of IC1 is used to detect the pulse signal after capacitance C3 and divider resistance R6 conditioning, namely
The real input signal being input on probe.P21 terminal, P22 terminal and the P23 terminal of IC1 be ADC input terminal, be used to
Probe in probe as signal output probe is connected, and receives the feedback signal of probe.
Using above-mentioned detection circuit, in conjunction with certain processing method, the detection to ice maker ice thickness may be implemented.
Fig. 4 is referred to, which show based on ice maker ice thickness detection method one embodiment of the present invention
Flow chart.
As schematically shown in Figure 4, the ice thickness detection method of the embodiment includes the following steps:
Step 41: the probe transmission pulse signal of Xiang Zuowei signal input probe.
Step 42: obtaining the probe output as signal output probe, pulse signal and visited through being inputted as signal
The probe of needle and as signal output probe probe after feedback signal.
Step 43: according at least to pair of the amplitude of pulse signal, the amplitude of feedback signal and probe and ice layer thickness
It should be related to judgement ice thickness.
Wherein, probe at least two, and all probes are configured as according to position known, corresponding with ice layer thickness
It sets and fixes.It specifically, is fixed on around the refrigerator pipes of ice maker.
As previously indicated, using the above-mentioned steps of the embodiment, by multiple probes in probe in advance according to it is known, with
The corresponding position of ice layer thickness is fixed.Pulse signal is applied on a probe as signal input probe, that
, will be and the pulse signal of input and two from the feedback signal that exports on another probe as signal output probe
The relevant signal of medium between a probe, specifically the resistance of medium between two probes is one relevant
Signal.And since the size of resistance has reacted the difference of medium, then according to the width of the amplitude of pulse signal and feedback signal
Degree can judge whether the medium between two probes is ice.In conjunction with the corresponding relationship of probe and ice layer thickness, can sentence
Make ice thickness.Moreover, the detection method using the embodiment is realized by the parameter for then passing through detection ice to the straight of ice thickness
Detection is connect, the reliability and accuracy of testing result are higher, and detection method is simple, easy to accomplish.
Alternatively embodiment, if ice maker temperature change is big, to reduce temperature change to testing result
The influence of accuracy, preferably also detect ice maker temperature, and according to temperature detected, the amplitude of pulse signal,
The amplitude and probe of feedback signal and the corresponding relationship of ice layer thickness determine ice thickness.
Alternatively embodiment, ice thickness detection method further include that the detection of ice thickness is determined that result is also external
Output.
Fig. 5 is referred to, which show based on second embodiment of ice maker ice thickness detection method of the present invention
Flow chart is specifically corresponding with ice layer thickness according to the amplitude of pulse signal, the amplitude of feedback signal and probe
The specific implementation flow of relationship judgement ice thickness.
As schematically shown in Figure 5, with reference to the foregoing description of Fig. 4 embodiment, after getting feedback signal, believed according to alternating-current pulse
Number amplitude, the amplitude of feedback signal and probe and ice layer thickness corresponding relationship determine ice thickness specific implementation, including under
State step:
Step 51: comparing the amplitude of pulse signal and the amplitude of feedback signal, determine feedback signal relative to friendship
The amplitude of signal pulse stream changes.
Step 52: determining to input as signal relative to the amplitude variation of pulse signal according to institute's feedback signal and visit
Resistance between the probe of needle and the probe for exporting probe as signal.
In practical applications, can be by testing the corresponding relationship of the amplitude of predefining variation and resistance value, and closed corresponding
System forms the form of table.Then, when in use, by the method tabled look-up it is known that the corresponding detection of current amplitude variation
The current resistance of medium.
Step 53: according to resistance judgement as between the probe of signal input probe and the probe as signal output probe
Medium whether be ice, and according to as signal input probe probe and as signal output probe probe and ice layer thickness
Corresponding relationship determine ice thickness.
In practical applications, the resistance of ice is known, and the corresponding relationship of probe and ice layer thickness is also known.That
, after step 52 obtains resistance, so that it may judge whether medium corresponding to current probe location detected is ice.
When being determined as ice, current ice thickness can determine that according to the corresponding relationship of probe and ice layer thickness.
The detection method of ice thickness is further described using three examples below.
Fig. 6 is referred to, which show based on ice maker ice thickness detection method third embodiment of the present invention
Probe arragement construction figure.
As shown in fig. 6, being arranged side by side in 61 side of refrigerator pipes has the first probe 62 and the second probe 63, the two probes are each
From being connected with lead 64.Using the two probes, in addition corresponding detection circuit, it can be determined that go out whether ice layer thickness reaches finger
Determine thickness.Specifically, the two probes are fixed in position corresponding with specified thickness, for example, apart from refrigerator pipes 61 away from
The two probes are fixed with a distance from for specified thickness.When detection, using circuit structure above-mentioned and method, if it is decided that first
It is ice between probe 62 and the second probe 63, then determines that ice thickness reaches specified thickness.
Fig. 7 is referred to, which show based on the 4th embodiment of ice maker ice thickness detection method of the present invention
Probe arragement construction figure.
As shown in fig. 7, being arranged side by side in 71 side of refrigerator pipes has 72 second probe 73 of the first probe and third probe 74, this
Three probes are respectively connected with lead 75.Using these three probes, in addition corresponding detection circuit, it can be determined that go out ice layer thickness
Whether specified thickness is reached, and it is possible to exclude the interference of bubble.Specifically, solid in position corresponding with specified thickness
These three fixed probes are for example fixing these three probes at for specified thickness distance apart from refrigerator pipes 71 respectively.Detection
When, using circuit structure above-mentioned and method, if it is decided that be ice between the first probe 72 and the second probe 73, or determine the
It is ice between two probes 73 and third probe 74, then determines that ice thickness reaches specified thickness.Two are constituted by using three probes
A probe groups, even if there is a probe groups to be judged as water, as long as another probe is determined as ice, then it is assumed that be bubble, in fact ice
Thickness has reached specified thickness.
Fig. 8 is referred to, which show based on the 5th embodiment of ice maker ice thickness detection method of the present invention
Probe arragement construction figure.
As shown in figure 8, being arranged side by side in the side of refrigerator pipes 81 has 6 probes, respectively the first probe 82, the second probe
83, third probe 84, the 4th probe 85, the 5th probe 86 and the 6th probe 87.This six probes according to apart from refrigerator pipes 81 by
Proximal and distal sequence is arranged successively, and is respectively connected with lead 88.Moreover, in this six probes, per two adjacent probe structures
At a probe groups.Specifically, the first probe 82 and the second probe 83 constitute a probe groups, the first probe 82 is used as signal
Probe is inputted, the second probe 83 exports probe as signal；Third probe 84 and the 4th probe 85 constitute a probe groups, third
Probe 84 inputs probe as signal, and the 4th probe 85 exports probe as signal；5th probe 86 and the 6th probe 87 are constituted
One probe groups, the 5th probe 86 input probe as signal, and the 6th probe 87 exports probe as signal.This six probes according to
The secondary position according to corresponding to ice thickness and fix.Wherein, the 6th probe 87 is capable of detecting when at a distance from refrigerator pipes 81
The maximum value of ice thickness.In addition corresponding detection circuit, by whether detecting the medium between two probes in every group of probe
For ice, then ice thickness can be determined in conjunction with the position of probe.
In this embodiment, successively make to judge according to the sequence at a distance from refrigerator pipes from the near to the distant, specifically using following
The detection of method realization ice thickness:
82 input AC pulse signal of the first probe is given first, obtains the feedback signal of the second probe 83 output；According to friendship
The amplitude of signal pulse stream and the amplitude of feedback signal determine the resistance between the first probe 82 and the second probe 83, according to electricity
Resistance judges whether the medium between the first probe 82 and the second probe 83 is ice.If ice, according to same treatment process, then it is right
Medium work between third probe 84 and the 4th probe 85 judges.If finally determined between the 5th probe 86 and the 6th probe 87
Medium be also ice, then determine that ice thickness has reached maximum gauge.
And during judgement, if determining medium according to the resistance of medium between the two of first probe groups probes
It is not ice, then, show that ice thickness is less than the minimum thickness that can be detected.And if it is two probes in intermediate probe groups
Between medium be water, then, the medium between two probes before two probes in probe groups must be ice (due to pressing
Judged according to sequence from the near to the distant), and it is the probe groups that a medium farthest apart from refrigerator pipes is ice.So,
Corresponding relationship according to a medium farthest apart from refrigerator pipes for probe and ice layer thickness in the probe groups of ice determines ice thickness
Degree.
As preferred embodiment, first, in accordance with the sequence at a distance from refrigerator pipes from the near to the distant, successively according to resistance
Judge whether the probe as signal input probe and the medium between the probe as signal output probe are ice in probe groups.
Find the probe groups that first medium is not ice.
Judge first medium be not medium in the subsequent all probe groups of probe groups of ice between two probes whether
It is not ice.
If first medium is not that the medium in the subsequent all probe groups of probe groups of ice between two probes is not
First medium is not then that probe groups adjacent before the probe groups of ice are determined as a medium farthest apart from refrigerator pipes by ice
For the probe groups of ice, and according to a medium farthest apart from refrigerator pipes be ice probe groups in probe and ice layer thickness pair
It should be related to determining ice thickness.
If first medium is not medium in the subsequent all probe groups of probe groups of ice between two probes there are also ice,
It may be the bubble in ice that show this not, which be the medium of ice, then finding next medium not is the probe groups of ice, continues to judge, directly
To determining that a medium farthest apart from refrigerator pipes is the probe groups of ice, and it is according to a medium farthest apart from refrigerator pipes
The corresponding relationship of probe and ice layer thickness in the probe groups of ice determines ice thickness.
That is, in practical applications, since freezing process can be along with the generation of bubble.If bubble is just in two
Between probe, judgment accuracy will affect.To solve this problem, the influence judged ice thickness is reduced as far as possible, is being determined
First is not off detection when not being ice, and is to continue with and makees judgement processing, to determine the actual thickness of ice.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although referring to aforementioned reality
Applying example, invention is explained in detail, for those of ordinary skill in the art, still can be to aforementioned implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these are modified or replace
It changes, the spirit and scope for claimed technical solution of the invention that it does not separate the essence of the corresponding technical solution.
Claims (7)
1. a kind of ice maker ice thickness detection method, which is characterized in that the described method includes:
To the probe transmission pulse signal as signal input probe；
It obtains the probe output as signal output probe, the pulse signal and as signal inputs probe through described
Feedback signal after probe and the probe as signal output probe；
According at least to the amplitude of the pulse signal, the amplitude of the feedback signal and probe pass corresponding with ice layer thickness
System determines ice thickness；
The probe at least two, and all probes be configured as according to position known, corresponding with ice layer thickness and
It is fixed；
Sentenced according to the corresponding relationship of the amplitude of the pulse signal, the amplitude of the feedback signal and probe and ice layer thickness
Determine ice thickness, specifically include:
Compare the amplitude of the pulse signal and the amplitude of the feedback signal, determines the feedback signal relative to institute
State the amplitude variation of pulse signal；
It determines described as signal input relative to the amplitude variation of the pulse signal according to the feedback signal to visit
Resistance between the probe of needle and the probe as signal output probe；
According to the resistance judge it is described as signal input probe probe and it is described as signal output probe probe it
Between medium whether be ice, and according to as signal input probe probe and it is described as signal output probe probe and ice
The corresponding relationship of thickness degree determines ice thickness；
According to the resistance judge it is described as signal input probe probe and it is described as signal output probe probe it
Between medium whether be ice, and according to as signal input probe probe and it is described as signal output probe probe and ice
The corresponding relationship of thickness degree determines ice thickness, specifically includes:
One described as the probe one group of spy of composition as signal output probe of the probe of signal input probe and one
Needle group, includes probe groups described in multiple groups, probe groups described in multiple groups according at a distance from the refrigerator pipes in ice maker by close and
Remote sequence is fixed, and at a distance from the refrigerator pipes and the ice layer thickness is corresponding；
According to the sequence at a distance from the refrigerator pipes from the near to the distant, conduct in the probe groups is successively judged according to the resistance
Whether signal inputs the probe of probe and is ice as the medium between the probe of signal output probe, finds apart from the refrigeration
A farthest medium of pipe is the probe groups of ice；
It is corresponding with ice layer thickness for the probe in the probe groups of ice according to a medium farthest apart from the refrigerator pipes
Relationship determines ice thickness.
2. detection method according to claim 1, which is characterized in that the method also includes:
Detect the temperature of ice maker；
It is thick according to the temperature, the amplitude of the pulse signal, the amplitude of the feedback signal and the probe and ice sheet
The corresponding relationship of degree determines ice thickness.
3. detection method according to claim 1, which is characterized in that according at a distance from the refrigerator pipes from the near to the distant
Sequentially, successively judged to export probe as the probe of signal input probe in the probe groups and as signal according to the resistance
Probe between medium whether be ice, find the probe groups that a medium farthest apart from the refrigerator pipes is ice；According to institute
The corresponding relationship for stating probe and ice layer thickness in the probe groups that a medium farthest apart from the refrigerator pipes is ice determines ice
Thickness；It specifically includes:
According to the sequence at a distance from the refrigerator pipes from the near to the distant, conduct in the probe groups is successively judged according to the resistance
Whether signal inputs the probe of probe and is ice as the medium between the probe of signal output probe；
Find the probe groups that first medium is not ice；
Judge first medium be not medium in the subsequent all probe groups of probe groups of ice between two probes whether
It is not ice；
If first medium is not that the medium in the subsequent all probe groups of probe groups of ice between two probes is not
Ice, by first medium be not probe groups adjacent before the probe groups of ice be determined as apart from the refrigerator pipes it is farthest one
A medium is the probe groups of ice, according to a medium farthest apart from the refrigerator pipes be probe in the probe groups of ice with
The corresponding relationship of ice layer thickness determines ice thickness；
If first medium is not that the medium in the subsequent all probe groups of probe groups of ice between two probes has ice, look for
It is not the probe groups of ice to next medium, continues to judge, until determines that a medium farthest apart from the refrigerator pipes is
The probe groups of ice, and be the probe and ice sheet thickness in the probe groups of ice according to a medium farthest apart from the refrigerator pipes
The corresponding relationship of degree determines ice thickness.
4. a kind of ice maker for realizing ice thickness detection method described in the claims 1 ice thickness detection circuit,
It is characterized in that, the detection circuit includes:
At least two probes, each probe are respectively connected with lead, and each probe be configured as according to it is known, with
The corresponding position of ice layer thickness is fixed；
Pulse signal output circuit is connect, by institute by lead with the probe in the probe as signal input probe
It states pulse signal and is transmitted to the probe as signal input probe；
Feedback signal receives circuit, is connect with the probe in the probe as signal output probe by lead, described in reception
Pulse signal exports after the probe as signal input probe and the probe as signal output probe
Feedback signal；
Ice thickness decision circuit, the pulse signal for being exported according at least to the pulse signal output circuit
Amplitude, the feedback signal receive the received feedback signal of circuit amplitude and probe and ice layer thickness corresponding relationship
Determine ice thickness；
The ice thickness decision circuit includes:
Signal amplitude processing unit is determined for the amplitude of the pulse signal and the amplitude of the feedback signal
The feedback signal changes relative to the amplitude of the pulse signal out；
Resistance determination unit is determined for changing according at least to the feedback signal relative to the amplitude of the pulse signal
Resistance between the probe and the probe as signal output probe as signal input probe out；
Ice thickness determination unit judges described as signal input for the resistance according to determined by the resistance determination unit and visits
Whether the medium between the probe of needle and the probe as signal output probe is ice, and inputs probe according to as signal
Probe and the probe and the corresponding relationship of ice layer thickness as signal output probe determine ice thickness.
5. detection circuit according to claim 4, which is characterized in that the detection circuit further include:
The temperature for detecting the temperature of the ice maker, and is transmitted to the ice thickness and determined by temperature sensing circuit
Circuit；
The alternating-current pulse that the ice thickness decision circuit is exported according to the temperature, the pulse signal output circuit
The amplitude of signal, the feedback signal receive the amplitude and the probe and ice layer thickness of the received feedback signal of circuit
Corresponding relationship determines ice thickness.
6. detection circuit according to claim 4, which is characterized in that the detection circuit further include:
Communicating circuit is connect with the ice thickness decision circuit, for externally exporting the judgement knot of the ice thickness decision circuit
Fruit.
7. the detection circuit according to any one of claim 4 to 6, which is characterized in that the pulse signal output
Circuit includes:
Positive output terminal exports the positive pulse signal of certain frequency；
Negative output terminal exports the undersuing of the certain frequency；
Capacitance, one end are connect with the positive output terminal；
Divider resistance, one end are connect with the negative output terminal, and the other end is connect with the other end of the capacitance；
Probe in the probe as signal input probe is connected to the capacitance and the divider resistance by lead
Between.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610829794.1A CN106289038B (en) | 2016-09-19 | 2016-09-19 | Ice maker ice thickness detection circuit and detection method |
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| CN201610829794.1A CN106289038B (en) | 2016-09-19 | 2016-09-19 | Ice maker ice thickness detection circuit and detection method |
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| CN106918283A (en) * | 2017-04-10 | 2017-07-04 | 杭州源牌科技股份有限公司 | A kind of measurement apparatus of ice storage unit ice thickness, measuring system and measuring method |
| GB2561553B (en) | 2017-04-12 | 2020-02-05 | Wli Trading Ltd | Ice bath for chilling liquid |
| CN108195282B (en) * | 2017-12-22 | 2020-11-03 | 太原理工大学 | Ice layer thickness measuring device based on piezoresistive sensor |
| CN111928768B (en) * | 2020-07-31 | 2022-04-12 | 中国第一汽车股份有限公司 | Device and method for detecting icing of crankcase ventilation pipeline |
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|---|---|---|---|---|
| CN1560560A (en) * | 2004-02-26 | 2005-01-05 | 太原理工大学 | Ice layer thickness sensor and its detecting method |
| CN102177446A (en) * | 2008-08-26 | 2011-09-07 | 伊沃普欧公司 | Ice thickness probe, ice thickness probe assembly and ice thickness monitoring apparatus |
| CN105737729A (en) * | 2016-03-02 | 2016-07-06 | 杭州源牌环境设备有限公司 | Ice thickness measurement device used for ice storage coil pipe |
| CN206037932U (en) * | 2016-09-19 | 2017-03-22 | 柳玉翠 | System ice device is with ice thickness check circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5559302A (en) * | 1978-10-30 | 1980-05-02 | Mayekawa Mfg Co Ltd | Freezing thickness detector |
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|---|---|---|---|---|
| CN1560560A (en) * | 2004-02-26 | 2005-01-05 | 太原理工大学 | Ice layer thickness sensor and its detecting method |
| CN102177446A (en) * | 2008-08-26 | 2011-09-07 | 伊沃普欧公司 | Ice thickness probe, ice thickness probe assembly and ice thickness monitoring apparatus |
| CN105737729A (en) * | 2016-03-02 | 2016-07-06 | 杭州源牌环境设备有限公司 | Ice thickness measurement device used for ice storage coil pipe |
| CN206037932U (en) * | 2016-09-19 | 2017-03-22 | 柳玉翠 | System ice device is with ice thickness check circuit |
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