CN106289038A - Ice maker ice thickness testing circuit and detection method - Google Patents
Ice maker ice thickness testing circuit and detection method Download PDFInfo
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- CN106289038A CN106289038A CN201610829794.1A CN201610829794A CN106289038A CN 106289038 A CN106289038 A CN 106289038A CN 201610829794 A CN201610829794 A CN 201610829794A CN 106289038 A CN106289038 A CN 106289038A
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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 testing circuit and detection method, described testing circuit includes: at least two probe, and each described probe is configured to fix according to the position corresponding with ice layer thickness；Pulse signal output circuit, with in described probe as signal input probe probe be connected by lead-in wire；Feedback signal reception circuit, with in described probe as signal output probe probe be connected by lead-in wire, receive described pulse signal through described as signal input probe probe and described as signal output probe probe after export feedback signal；Ice thickness decision circuit, for judging ice thickness according at least to amplitude, the amplitude of described feedback signal and the probe of described pulse signal with the corresponding relation of ice layer thickness.The application present invention, it is achieved the directly detection to ice thickness, improves the accuracy to ice thickness detection and reliability.
Description
Technical field
The invention belongs to ice maker technology, specifically, relate to ice maker ice thickness testing circuit and detection
Method.
Background technology
Refrigeration mode water dispenser or other have on the similar devices of ice maker, due to refrigeration needs, it usually needs
Keep certain thickness ice to guarantee that refrigeration is optimal, freeze accordingly, it would be desirable to detection refrigerator pipes (being equivalent to vaporizer) is neighbouring
Thickness.
Conventional art means are not directly to detect the thickness of ice, but the method using temperature detection, when temperature reaches one
During definite value, it is believed that and thickness meets requirement, stops refrigeration.This method controls two problems easily occur:
One is the deviation due to sensor and a variety of causes of water itself, it may appear that situation about can not freeze；
Two is the deviation due to sensor and a variety of causes of water itself, it may appear that the situation of whole cold water chamber freeze over；
And both of these case all can have a strong impact on user and use frozen water.
Summary of the invention
It is an object of the invention to provide a kind of ice maker ice thickness testing circuit and detection method, use resistance measurement
Means realize the direct detection of ice thickness, improve the accuracy to ice thickness detection and reliability.
For achieving the above object, the ice maker ice thickness testing circuit that the present invention provides uses following technical side
Case is achieved:
A kind of ice maker ice thickness testing circuit, described testing circuit includes:
At least two probe, each described probe is respectively connected with lead-in wire, and each described probe is configured to according to known and
The corresponding position of ice layer thickness is fixed；
Pulse signal output circuit, with in described probe as signal input probe probe be connected by lead-in wire, by institute
State pulse signal transmission to the described probe as signal input probe；
Feedback signal reception circuit, with in described probe as signal output probe probe be connected by lead-in wire, receive described in
Pulse signal exports after the described probe as signal input probe and the described probe as signal output probe
Feedback signal；
Ice thickness decision circuit, for the described pulse signal according at least to the output of described pulse signal output circuit
The corresponding relation of amplitude, the amplitude of described feedback signal that receives of described feedback signal reception circuit and probe and ice layer thickness
Judge ice thickness.
Testing circuit as above, described testing circuit also includes:
Temperature sensing circuit, is used for detecting the temperature of described ice maker, and the transmission of described temperature is judged to described ice thickness
Circuit；
Described ice thickness decision circuit is according to described temperature, the described alternating-current pulse of described pulse signal output circuit output
The amplitude of described feedback signal that the amplitude of signal, described feedback signal reception circuit receive and described probe and ice layer thickness
Corresponding relation judges ice thickness.
Testing circuit as above, described testing circuit also includes:
Communicating circuit, is connected with described ice thickness decision circuit, for externally exporting the judgement knot of described ice thickness decision circuit
Really.
Testing circuit as above, described AC-AC output of pulse signal circuit includes:
Positive output terminal, the positive pulse signal of output certain frequency；
Negative output terminal, exports the undersuing of described certain frequency；
Capacitance, one end is connected with described positive output terminal；
Divider resistance, one end is connected with described negative output terminal, and the other end is connected with the other end of described capacitance；
In described probe, the probe as signal input probe is connected to described capacitance and described divider resistance by lead-in wire
Between.
Testing circuit as above, described ice thickness decision circuit includes:
Signal amplitude processing unit, for amplitude and the amplitude of described feedback signal of relatively described pulse signal, determines
Go out the described feedback signal amplitude of variation relative to described pulse signal；
Resistance determines unit, for determining relative to the amplitude of variation of described pulse signal according at least to described feedback signal
Go out the resistance between the described probe as signal input probe and the described probe exporting probe as signal；
Ice thickness determines unit, described as signal input spy for determining that resistance determined by unit judges according to described resistance
Whether the medium between probe and the described probe exporting probe as signal of pin is ice, and inputs probe according to as signal
Probe and the described corresponding relation as probe and the ice layer thickness of signal output probe determine ice thickness.
For realizing aforementioned invention purpose, the ice maker ice thickness detection method that the present invention provides uses following technical side
Case is achieved:
A kind of ice maker ice thickness detection method, described method includes:
To the probe transmission AC-AC pulse signal as signal input probe；
Obtain probe output as signal output probe, described pulse signal through described as signal input probe
Feedback signal after probe and the described probe exporting probe as signal；
Amplitude, the amplitude of described feedback signal and probe pass corresponding with ice layer thickness according at least to described pulse signal
System judges ice thickness；
Described probe at least two, and all probes are configured to according to the known position corresponding with ice layer thickness
Fixing.
Detection method as above, described method also includes:
The temperature of detection ice maker；
Thick with ice sheet according to described temperature, the amplitude of described pulse signal, the amplitude of described feedback signal and described probe
The corresponding relation of degree judges ice thickness.
Detection method as above, according to amplitude, the amplitude of described feedback signal and the spy of described pulse signal
Pin judges ice thickness with the corresponding relation of ice layer thickness, specifically includes:
Relatively the amplitude of described pulse signal and the amplitude of described feedback signal, determine that described feedback signal is relative to institute
State the amplitude of variation of pulse signal；
Determine described as signal input spy relative to the amplitude of variation of described pulse signal according to described feedback signal
Resistance between probe and the described probe exporting probe as signal of pin；
According to described resistance judge described as signal input probe probe and described as signal output probe probe it
Between medium whether be ice, and according to as the probe of signal input probe and described as the signal output probe of probe and ice
The corresponding relation of layer thickness determines ice thickness.
Detection method as above, judges the described probe as signal input probe and described work according to described resistance
Whether it is ice for the medium between the probe of signal output probe, and according to inputting the probe of probe and described conduct as signal
The probe of signal output probe determines ice thickness with the corresponding relation of ice layer thickness, specifically includes:
One described probe as signal input probe and a described probe as signal output probe constitute one group of spy
Pin group, includes and organizes described probe groups more, organize described probe groups according to the distance of the refrigerator pipes in described refrigerating plant by
Proximal and distal order is fixed, and corresponding with the distance of described refrigerator pipes and described ice layer thickness；
According to the order from the close-by examples to those far off of the distance with described refrigerator pipes, judge conduct in described probe groups successively according to described resistance
Whether the medium between probe and the probe exporting probe as signal of signal input probe is ice, finds apart from described refrigeration
Managing a farthest medium is the probe groups of ice；
Corresponding with ice layer thickness according to the probe in the described probe groups that a medium is ice farthest apart from described refrigerator pipes
Relation determines ice thickness.
Detection method as above, according to the order from the close-by examples to those far off of the distance with described refrigerator pipes, according to described resistance
Judge successively in described probe groups as the probe of signal input probe with as the medium between the probe of signal output probe
Whether is ice, finding a medium apart from described refrigerator pipes is farthest is the probe groups of ice；According to described apart from described refrigerator pipes
The farthest probe in the probe groups that a medium is ice determines ice thickness with the corresponding relation of ice layer thickness；Specifically include:
According to the order from the close-by examples to those far off of the distance with described refrigerator pipes, judge conduct in described probe groups successively according to described resistance
Whether the medium between probe and the probe exporting probe as signal of signal input probe is ice；
Finding first medium is not the probe groups of ice；
Judge described first medium be not ice probe groups all probe groups below in medium between two probes whether
It is not ice；
If described first medium be not ice probe groups all probe groups below in medium between two probes be not
Ice, the probe groups that described first medium is not adjacent before the probe groups of ice is defined as apart from described refrigerator pipes farthest one
Individual medium is the probe groups of ice, according to the probe in the described probe groups that a medium is ice farthest apart from described refrigerator pipes with
The corresponding relation of ice layer thickness determines ice thickness；
If described first medium be not ice probe groups all probe groups below in medium between two probes have ice, look for
Not the probe groups of ice to next medium, continuing to judge, until determining that a medium apart from described refrigerator pipes is farthest is
The probe groups of ice, and thick with ice sheet according to the probe in the described probe groups that a medium is ice farthest apart from described refrigerator pipes
The corresponding relation of degree determines ice thickness.
Compared with prior art, advantages of the present invention and good effect are: the present invention provide ice thickness testing circuit and
In detection method, by arranging the probe corresponding with ice layer thickness, obtain by applying pulse signal to probe
Feedback signal judges whether the medium of probe present position is ice, it is achieved the directly detection to ice thickness, detection means is simple
Easy, reliability and the accuracy of testing result are higher.
After reading in conjunction with the accompanying the detailed description of the invention of the present invention, the other features and advantages of the invention will become more clear
Chu.
Accompanying drawing explanation
Fig. 1 is theory diagram based on ice maker first embodiment of ice thickness testing circuit of the present invention；
Fig. 2 is theory diagram based on ice maker second embodiment of ice thickness testing circuit of the present invention；
Fig. 3 is circuit theory diagrams based on the 3rd embodiment of ice maker ice thickness testing circuit of the present invention；
Fig. 4 is flow chart based on ice maker first embodiment of ice thickness detection method of the present invention；
Fig. 5 is flow chart based on ice maker second embodiment of ice thickness detection method of the present invention；
Fig. 6 is probe arrangement figure based on the 3rd embodiment of ice maker ice thickness detection method of the present invention；
Fig. 7 is probe arrangement figure based on the 4th embodiment of ice maker ice thickness detection method of the present invention；
Fig. 8 is probe arrangement figure based on the 5th embodiment of ice maker ice thickness detection method of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below with reference to drawings and Examples,
The present invention is described in further detail.
First, the brief description present invention realize ice maker ice thickness detection ultimate principle:
Finding with test after deliberation, resistance (conductivity) difference of ice and water is bigger.For certain thickness water, or water and ice
Mixture, resistance is several kilohms to more than 100 kilohms；And for the ice of same thickness, resistance can increase to several megohms.
Based on this principle, it may be considered that determine whether certain position is ice by the way of measuring resistance.The measurement of resistance can be passed through
Attenuation amplitude between input signal and output signal characterizes.And by predicting the ice layer thickness corresponding to this certain position, then
The detection to ice thickness can be realized.
Referring to Fig. 1, this figure show based on ice maker first embodiment of ice thickness testing circuit of the present invention
Theory diagram.
As it is shown in figure 1, the testing circuit of this 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, it is possible to correspond at least 1
Ice thickness, and probe 12 include as signal input probe probe and as signal output probe probe.Each probe
12 are respectively connected with lead-in wire, and each probe 12 is configured to fix according to the known position corresponding with ice layer thickness.Exchange
Output of pulse signal circuit 11 with in probe 12 as signal input probe probe is connected by the lead-in wire of this probe, will exchange
Pulse signal transmission to this as signal input probe probe.As signal in feedback signal reception circuit 13, with probe 12
The probe of output probe is connected by this lead-in wire, receives the pulse signal of pulse signal output circuit 11 output through making
For the probe of signal input probe with as the feedback signal of output after the probe of signal output probe.Ice thickness decision circuit
14, for the amplitude of pulse signal according to pulse signal output circuit 11 output, feedback signal reception circuit 13
The amplitude of the feedback signal received and the corresponding relation of probe 12 and ice layer thickness judge ice thickness.
As described by front ultimate principle, by the multiple probes in probe 12 in advance according to known relative with ice layer thickness
The position answered is fixed.Typically, it is near the refrigerator pipes being fixed in refrigerating plant, keep at a certain distance away with refrigerator pipes.Lift
For example, if there being two probes, two probes are arranged on according to the mode parallel with refrigerator pipes the same side of refrigerator pipes, and
Two probe separation certain distances are arranged, and a distance refrigerator pipes is near, and another refrigerator pipes is remote.So, farthest probe and system
Distance between cold pipe is exactly the ice thickness utilizing this two probes can determine.It is additionally, since pulse signal to be applied to
On a probe as signal input probe, then, from another as the feedback of output the probe of signal output probe
Signal is by being a signal relevant to the medium between pulse signal and two probes of input, specifically with two
The signal that the resistance of the medium between individual probe is relevant.And owing to the size of resistance has reacted the difference of medium, then ice thickness
The amplitude of the pulse signal that degree decision circuit 14 exports according to pulse signal output circuit 11 and feedback signal reception
The amplitude of the feedback signal that circuit 13 receives can judge whether the medium between two probes is ice.In conjunction with probe and ice
The corresponding relation of layer thickness, can determine ice thickness.And, use the testing circuit of this embodiment by then passing through detection ice
Parameter realize to ice thickness directly detecting, reliability and the accuracy of testing result are higher, and testing circuit simple in construction,
Easily realize.
Referring to Fig. 2, this figure show based on ice maker second embodiment of ice thickness testing circuit of the present invention
Theory diagram.
As in figure 2 it is shown, the testing circuit of this 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
Annexation and function between road 21, probe 22 and feedback signal reception circuit 23 are similar with Fig. 1 embodiment, refer to Fig. 1
The description of embodiment.And temperature sensing circuit 25 is used for detecting the temperature of ice maker, and temperature transmission is judged to ice thickness
Circuit 24；Communicating circuit 26 is connected with ice thickness decision circuit 24, for the judgement knot of externally output ice thickness decision circuit 24
Really, such as, result of determination is transmitted to host computer or monitor terminal.Arranging temperature sensing circuit 25, to be primarily directed to variations in temperature big
Refrigerating plant, by temperature, testing result compensated correction, reduces because variations in temperature affect the mistake that dielectric resistance changes
Difference.For communicating circuit 26, communicating circuit structure commonly used in the prior art can be selected as required, such as, use UART
Deng.
And, ice thickness decision circuit 24 is included that the signal amplitude processing unit 241 being sequentially connected with, resistance determine list
242 grades of ice thickness of unit determine unit 243.Wherein, signal amplitude processing unit 241 is used for comparing pulse signal output circuit
The amplitude of the pulse signal of 21 outputs and the amplitude of the feedback signal of feedback signal reception circuit 23 output, determine feedback
Signal is relative to the amplitude of variation of pulse signal.Resistance determines that Unit 242 are for exporting according to temperature sensing circuit 25
The feedback signal of temperature and signal amplitude processing unit 241 output determines conduct relative to the amplitude of variation of pulse signal
Resistance between probe and the probe exporting probe as signal of signal input probe.And ice thickness determine unit 243 for
Determine that resistance determined by unit 242 judges the probe as signal input probe and as signal output probe according to resistance
Whether the medium between probe is ice, and according to as signal input probe probe and as signal output probe probe with
The corresponding relation of ice layer thickness determines ice thickness.
It should be understood that resistance is true if for the ice thickness testing circuit without temperature sensing circuit 25
Cell 242 only needs to determine as signal input probe relative to the amplitude of variation of pulse signal according to feedback signal
Probe and as signal output probe probe between resistance.
Refer to Fig. 3, based on 3rd embodiment of ice maker ice thickness testing circuit of the present invention shown in this figure
Circuit theory diagrams.
As schematically shown in Figure 3, IC1 is as the integrated chip of testing circuit core, it is achieved primary signal output, feedback signal are adopted
Collection, feedback signal process, ice thickness judges and the output etc. of result of determination.
CN1 is communicating circuit and power supply circuits interface.Communicating circuit has two, and one is and the UART mouth as IC1
The UART communication interface that P01 terminal and P02 terminal are formed, another is the audion that an I/O port P16 terminal with IC1 is connected
The pulse width communication interface that N1 is formed.One of them communication modes can be selected according to actual needs
CN2 is the connector interface of probe, and the lead-in wire of probe is connected on this interface CN2, and then is connected by CN2 with IC1.
NTC1 is temperature sensor interface, detection ice maker temperature temperature sensor by this interface and accordingly temperature
Degree Acquisition Circuit is connected with the temperature acquisition terminal AIN16 of IC1.
The P10 mouth of IC1 is as the positive output terminal of pulse signal output circuit, the positive pulse letter of output certain frequency
Number, and P11 mouth is as the negative output terminal of pulse signal output circuit, the undersuing of output same frequency.Every straight electricity
Holding C3 and divider resistance R6 and constitute the modulate circuit of pulse signal, C3 one end is connected 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 connected with negative output terminal P11.In capacitance C3 and dividing potential drop
By output AC pulse signal between resistance R6, the probe as signal input probe is connected to CN2 by lead-in wire within the probe
On interface, and then it is connected between capacitance C3 and divider resistance R6, to obtain pulse signal input.Handed over by employing
Signal pulse stream, as the input signal of probe, can be avoided the water in detected refrigerating plant polarized and affect detection standard
The really problem of property.
The P20 terminal of IC1 is used for detecting the pulse signal after capacitance C3 and divider resistance R6 nurses one's health, namely
The real input signal being input on probe.The P21 terminal of IC1, P22 terminal and P23 terminal are ADC input terminal, be used for
In probe, the probe as signal output probe is connected, and receives the feedback signal of probe.
Use above-mentioned testing circuit, in conjunction with certain processing method, it is possible to achieve the detection to ice maker ice thickness.
Referring to Fig. 4, this figure show based on ice maker first embodiment of ice thickness detection method of the present invention
Flow chart.
As schematically shown in Figure 4, the ice thickness detection method of this embodiment comprises the steps:
Step 41: to the probe transmission pulse signal as signal input probe.
Step 42: obtain the probe output as signal output probe, pulse signal through visiting as signal input
The probe of pin and as the feedback signal after the probe of signal output probe.
Step 43: right according at least to the amplitude of pulse signal, the amplitude of feedback signal and probe and ice layer thickness
Judgement ice thickness should be related to.
Wherein, probe at least two, and all probes are configured to according to the known position corresponding with ice layer thickness
Put and fix.Specifically, it is integrally fixed at around the refrigerator pipes of ice maker.
As previously indicated, use the above-mentioned steps of this embodiment, by the multiple probes in probe in advance according to known and
The corresponding position of ice layer thickness is fixed.Pulse signal is applied on a probe of signal input probe, that
, from another as the feedback signal of output the probe of signal output probe will be and the pulse signal and two of input
The signal that medium between individual probe is relevant, relevant to the resistance of the medium between two probes specifically one
Signal.And owing to the size of resistance has reacted the difference of medium, then according to amplitude and the width of feedback signal of pulse signal
Degree can judge whether the medium between two probes is ice.In conjunction with the corresponding relation of probe Yu ice layer thickness, can sentence
Make ice thickness.And, use the detection method of this embodiment by the parameter then passing through detection ice realize ice thickness straight
Connecing detection, reliability and the accuracy of testing result are higher, and detection method is simple, easily realizes.
Alternatively embodiment, if ice maker variations in temperature is big, for reducing variations in temperature to testing result
The impact of accuracy, the most also detects the temperature of ice maker, and according to the temperature detected, the amplitude of pulse signal,
The corresponding relation of the amplitude of feedback signal and probe and ice layer thickness judges ice thickness.
Alternatively embodiment, ice thickness detection method also includes the most external for the detection result of determination of ice thickness
Output.
Referring to Fig. 5, this figure show based on ice maker second embodiment of ice thickness detection method of the present invention
Flow chart, specifically, is that the amplitude according to pulse signal, the amplitude of feedback signal and probe are corresponding with ice layer thickness
Relation judge ice thickness implement flow process.
As schematically shown in Figure 5, with reference to the foregoing description of Fig. 4 embodiment, after getting feedback signal, believe according to alternating-current pulse
Number the corresponding relation of amplitude, the amplitude of feedback signal and probe and ice layer thickness judge implementing of ice thickness, including under
State step:
Step 51: compare the amplitude of pulse signal and the amplitude of feedback signal, determines that feedback signal is relative to exchange arteries and veins
Rush the amplitude of variation of signal.
Step 52: determine as signal input spy relative to the amplitude of variation of pulse signal according to institute's feedback signal
Resistance between probe and the probe exporting probe as signal of pin.
In actual applications, by the corresponding relation of the predetermined amplitude of variation of experiment with resistance value, and correspondence can be closed
System forms the form of table.Then, in use, by the method tabled look-up it is known that current amplitude change corresponding to detection
The current resistance of medium.
Step 53: judge between the probe as signal input probe and the probe as signal output probe according to resistance
Medium whether be ice, and according to the probe as signal input probe with as the signal output probe of probe and ice layer thickness
Corresponding relation determine ice thickness.
In actual applications, the resistance of ice is known, and probe and the corresponding relation of ice layer thickness are also known.That
, after step 52 obtains resistance, it is possible to judge whether the medium corresponding to the probe location currently detected is ice.
When being judged to ice, i.e. can determine that current ice thickness according to the corresponding relation of probe Yu ice layer thickness.
Use three examples that the detection method of ice thickness is expanded on further below.
Referring to Fig. 6, this figure show based on the 3rd embodiment of ice maker ice thickness detection method of the present invention
Probe arrangement figure.
As shown in Figure 6, being arranged side by side the first probe 62 and the second probe 63 in refrigerator pipes 61 side, the two probe is each
From connecting leaded 64.Application the two probe, adds corresponding testing circuit, it can be determined that go out whether ice layer thickness reaches to refer to
Determine thickness.Specifically, fix the two probe in the position corresponding with appointed thickness, such as, distance refrigerator pipes 61 away from
The two probe is fixed from for appointed thickness distance.During detection, use aforesaid circuit structure and method, if it is decided that first
It is ice between probe 62 and the second probe 63, then judges that ice thickness arrives appointed thickness.
Referring to Fig. 7, this figure show based on the 4th embodiment of ice maker ice thickness detection method of the present invention
Probe arrangement figure.
As it is shown in fig. 7, be arranged side by side the first probe 72 second probe 73 and the 3rd probe 74 in refrigerator pipes 71 side, this
Three probes are respectively connected with going between 75.Application these three probe, adds corresponding testing circuit, it can be determined that go out ice layer thickness
Whether reach appointed thickness, and it is possible to get rid of the interference of bubble.Specifically, solid in the position corresponding with appointed thickness
Determine these three probe, such as, fix these three probe in distance refrigerator pipes 71 respectively apart from for appointed thickness distance.Detection
Time, use aforesaid circuit structure and method, if it is decided that be ice between the first probe 72 and the second probe 73, or judge the
It is ice between two probes 73 and the 3rd probe 74, then judges that ice thickness arrives appointed thickness.By using three probes to constitute two
Individual probe groups, even if having a probe groups to be judged as water, as long as another probe is judged to ice, then it is assumed that for blister, in fact ice
Thickness has reached appointed thickness.
Referring to Fig. 8, this figure show based on the 5th embodiment of ice maker ice thickness detection method of the present invention
Probe arrangement figure.
As shown in Figure 8,6 probes, respectively first probe the 82, second probe it have been arranged side by side in the side of refrigerator pipes 81
83, the 3rd probe the 84, the 4th probe the 85, the 5th probe 86 and the 6th probe 87.These six probes according to distance refrigerator pipes 81 by
Proximal and distal order is arranged in order, and is respectively connected with going between 88.And, in these six probes, two the most adjacent probe structures
Become a probe groups.Specifically, the first probe 82 and the second probe 83 constitute a probe groups, and the first probe 82 is as signal
Input probe, the second probe 83 exports probe as signal；3rd probe 84 and the 4th probe 85 constitute a probe groups, and the 3rd
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 inputs probe as signal, and the 6th probe 87 exports probe as signal.These six probes depend on
Secondary fix according to the position corresponding to ice thickness.Wherein, the 6th probe 87 is capable of detecting when with the distance of refrigerator pipes 81
The maximum of ice thickness.Plus corresponding testing circuit, often organized the medium between two probes in probe by detection whether
For ice, then can determine ice thickness in conjunction with the position of probe.
In this embodiment, making successively to judge according to the order from the close-by examples to those far off of the distance with refrigerator pipes, concrete employing is following
Method realizes the detection of ice thickness:
First the first probe 82 input AC pulse signal is given, it is thus achieved that the feedback signal of the second probe 83 output；According to exchange arteries and veins
The amplitude of the amplitude and feedback signal of rushing signal determines the resistance between the first probe 82 and the second probe 83, sentences according to resistance
Whether disconnected medium between first probe 82 and the second probe 83 is ice.If ice, according to same processing procedure, then to the 3rd
Medium between probe 84 and the 4th probe 85 is made to judge.If Jie finally judged between the 5th probe 86 and the 6th probe 87
Matter is also ice, then judge that ice thickness has reached maximum gauge.
And during judging, if judging medium according to the resistance of medium between two probes of first probe groups
It not ice, then, show that ice thickness is less than the minimum thickness that can be detected by.And if in two probes of middle probe groups
Between medium be water, then, before these two probes, medium between two probes in probe groups must be for ice (owing to pressing
Judge according to order from the close-by examples to those far off), and its be the distance farthest medium of refrigerator pipes be the probe groups of ice.So,
Corresponding relation according to the probe in the probe groups that a medium is ice that distance refrigerator pipes is farthest with ice layer thickness determines ice thickness
Degree.
As preferred embodiment, it is first according to the order from the close-by examples to those far off of the distance with refrigerator pipes, according to resistance successively
Judge whether the medium inputted between the probe of probe and the probe exporting probe as signal as signal in probe groups is ice.
Finding first medium is not the probe groups of ice.
Judge first medium be not ice probe groups all probe groups below in medium between two probes whether
It is not ice.
If first medium be not ice probe groups all probe groups below in medium between two probes be not
Ice, then be defined as the medium that distance refrigerator pipes is farthest by the probe groups that first medium is not adjacent before the probe groups of ice
For the probe groups of ice, and right according to the probe in the farthest probe groups that a medium is ice of distance refrigerator pipes and ice layer thickness
Should be related to and determine ice thickness.
If first medium be not ice probe groups all probe groups below in medium between two probes also have ice,
Show that this is not the blister that the medium of ice is probably in ice, then finding next medium is not the probe groups of ice, continues to judge, directly
It is the probe groups of ice to determining a medium apart from refrigerator pipes is farthest, and according to the medium that distance refrigerator pipes is farthest is
Probe in the probe groups of ice determines ice thickness with the corresponding relation of ice layer thickness.
That is, in actual applications, owing to freezing process can be along with the generation of blister.If blister is just in two
Between probe, judgment accuracy can be affected.For solving this problem, reduce the impact that ice thickness is judged as far as possible, determining
First is not not to be to stop detection during ice, and is to continue with making judgement and processes, to determine the actual thickness of ice.
Above example is only in order to illustrate technical scheme, rather than is limited；Although with reference to aforementioned reality
Execute example the present invention has been described in detail, for the person of ordinary skill of the art, still can be to aforementioned enforcement
Technical scheme described in example is modified, or wherein portion of techniques feature is carried out equivalent；And these are revised or replace
Change, do not make the essence of appropriate technical solution depart from the spirit and scope of claimed technical solution of the invention.
Claims (10)
1. an ice maker ice thickness testing circuit, it is characterised in that described testing circuit includes:
At least two probe, each described probe is respectively connected with lead-in wire, and each described probe is configured to according to known and
The corresponding position of ice layer thickness is fixed；
Pulse signal output circuit, with in described probe as signal input probe probe be connected by lead-in wire, by institute
State pulse signal transmission to the described probe as signal input probe；
Feedback signal reception circuit, with in described probe as signal output probe probe be connected by lead-in wire, receive described in
Pulse signal exports after the described probe as signal input probe and the described probe as signal output probe
Feedback signal；
Ice thickness decision circuit, for the described pulse signal according at least to the output of described pulse signal output circuit
The corresponding relation of amplitude, the amplitude of described feedback signal that receives of described feedback signal reception circuit and probe and ice layer thickness
Judge ice thickness.
Testing circuit the most according to claim 1, it is characterised in that described testing circuit also includes:
Temperature sensing circuit, is used for detecting the temperature of described ice maker, and the transmission of described temperature is judged to described ice thickness
Circuit；
Described ice thickness decision circuit is according to described temperature, the described alternating-current pulse of described pulse signal output circuit output
The amplitude of described feedback signal that the amplitude of signal, described feedback signal reception circuit receive and described probe and ice layer thickness
Corresponding relation judges ice thickness.
Testing circuit the most according to claim 1, it is characterised in that described testing circuit also includes:
Communicating circuit, is connected with described ice thickness decision circuit, for externally exporting the judgement knot of described ice thickness decision circuit
Really.
Testing circuit the most according to any one of claim 1 to 3, it is characterised in that described pulse signal exports
Circuit includes:
Positive output terminal, the positive pulse signal of output certain frequency；
Negative output terminal, exports the undersuing of described certain frequency；
Capacitance, one end is connected with described positive output terminal；
Divider resistance, one end is connected with described negative output terminal, and the other end is connected with the other end of described capacitance；
In described probe, the probe as signal input probe is connected to described capacitance and described divider resistance by lead-in wire
Between.
Testing circuit the most according to any one of claim 1 to 3, it is characterised in that described ice thickness decision circuit bag
Include:
Signal amplitude processing unit, for amplitude and the amplitude of described feedback signal of relatively described pulse signal, determines
Go out the described feedback signal amplitude of variation relative to described pulse signal；
Resistance determines unit, for determining relative to the amplitude of variation of described pulse signal according at least to described feedback signal
Go out the resistance between the described probe as signal input probe and the described probe exporting probe as signal；
Ice thickness determines unit, described as signal input spy for determining that resistance determined by unit judges according to described resistance
Whether the medium between probe and the described probe exporting probe as signal of pin is ice, and inputs probe according to as signal
Probe and the described corresponding relation as probe and the ice layer thickness of signal output probe determine ice thickness.
6. an ice maker ice thickness detection method, it is characterised in that described method includes:
To the probe transmission pulse signal as signal input probe；
Obtain probe output as signal output probe, described pulse signal through described as signal input probe
Feedback signal after probe and the described probe exporting probe as signal；
Amplitude, the amplitude of described feedback signal and probe pass corresponding with ice layer thickness according at least to described pulse signal
System judges ice thickness；
Described probe at least two, and all probes are configured to according to the known position corresponding with ice layer thickness
Fixing.
Detection method the most according to claim 6, it is characterised in that described method also includes:
The temperature of detection ice maker；
Thick with ice sheet according to described temperature, the amplitude of described pulse signal, the amplitude of described feedback signal and described probe
The corresponding relation of degree judges ice thickness.
Detection method the most according to claim 6, it is characterised in that according to the amplitude of described pulse signal, described
The corresponding relation of the amplitude of feedback signal and probe and ice layer thickness judges ice thickness, specifically includes:
Relatively the amplitude of described pulse signal and the amplitude of described feedback signal, determine that described feedback signal is relative to institute
State the amplitude of variation of pulse signal；
Determine described as signal input spy relative to the amplitude of variation of described pulse signal according to described feedback signal
Resistance between probe and the described probe exporting probe as signal of pin；
According to described resistance judge described as signal input probe probe and described as signal output probe probe it
Between medium whether be ice, and according to as the probe of signal input probe and described as the signal output probe of probe and ice
The corresponding relation of layer thickness determines ice thickness.
Detection method the most according to claim 8, it is characterised in that judge described as signal input according to described resistance
Whether the medium between probe and the described probe exporting probe as signal of probe is ice, and visits according to as signal input
The probe of pin and described determine ice thickness as the probe of signal output probe with the corresponding relation of ice layer thickness, specifically includes:
One described probe as signal input probe and a described probe as signal output probe constitute one group of spy
Pin group, includes and organizes described probe groups more, organize described probe groups according to the distance of the refrigerator pipes in described refrigerating plant by
Proximal and distal order is fixed, and corresponding with the distance of described refrigerator pipes and described ice layer thickness；
According to the order from the close-by examples to those far off of the distance with described refrigerator pipes, judge conduct in described probe groups successively according to described resistance
Whether the medium between probe and the probe exporting probe as signal of signal input probe is ice, finds apart from described refrigeration
Managing a farthest medium is the probe groups of ice；
Corresponding with ice layer thickness according to the probe in the described probe groups that a medium is ice farthest apart from described refrigerator pipes
Relation determines ice thickness.
Method the most according to claim 9, it is characterised in that according to the distance of described refrigerator pipes from the close-by examples to those far off suitable
Sequence, judges in described probe groups as the probe of signal input probe with as signal output probe successively according to described resistance
Whether the medium between probe is ice, and finding a medium apart from described refrigerator pipes is farthest is the probe groups of ice；According to described
Probe in the probe groups that a medium is ice that described refrigerator pipes is farthest determines ice thickness with the corresponding relation of ice layer thickness
Degree；Specifically include:
According to the order from the close-by examples to those far off of the distance with described refrigerator pipes, judge conduct in described probe groups successively according to described resistance
Whether the medium between probe and the probe exporting probe as signal of signal input probe is ice；
Finding first medium is not the probe groups of ice；
Judge described first medium be not ice probe groups all probe groups below in medium between two probes whether
It is not ice；
If described first medium be not ice probe groups all probe groups below in medium between two probes be not
Ice, the probe groups that described first medium is not adjacent before the probe groups of ice is defined as apart from described refrigerator pipes farthest one
Individual medium is the probe groups of ice, according to the probe in the described probe groups that a medium is ice farthest apart from described refrigerator pipes with
The corresponding relation of ice layer thickness determines ice thickness；
If described first medium be not ice probe groups all probe groups below in medium between two probes have ice, look for
Not the probe groups of ice to next medium, continuing to judge, until determining that a medium apart from described refrigerator pipes is farthest is
The probe groups of ice, and thick with ice sheet according to the probe in the described probe groups that a medium is ice farthest apart from described refrigerator pipes
The corresponding relation of degree determines ice thickness.
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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 |
| CN108195282A (en) * | 2017-12-22 | 2018-06-22 | 太原理工大学 | A kind of ice layer thickness measuring device based on piezoresistance sensor |
| CN111928768A (en) * | 2020-07-31 | 2020-11-13 | 中国第一汽车股份有限公司 | Device and method for detecting icing of crankcase ventilation pipeline |
| US11609041B2 (en) | 2017-04-12 | 2023-03-21 | Wli Trading Limited | Cooling bath for cooling a liquid |
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| 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 |
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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 |
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| CN108195282A (en) * | 2017-12-22 | 2018-06-22 | 太原理工大学 | A kind of ice layer thickness measuring device based on piezoresistance sensor |
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| CN111928768A (en) * | 2020-07-31 | 2020-11-13 | 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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| Publication number | Publication date |
|---|---|
| CN106289038B (en) | 2019-08-09 |
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