CN115032701A - Microwave detector and icing and frosting detection device based on same - Google Patents
Microwave detector and icing and frosting detection device based on same Download PDFInfo
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- CN115032701A CN115032701A CN202210602158.0A CN202210602158A CN115032701A CN 115032701 A CN115032701 A CN 115032701A CN 202210602158 A CN202210602158 A CN 202210602158A CN 115032701 A CN115032701 A CN 115032701A
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- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 15
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- 239000000523 sample Substances 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000010257 thawing Methods 0.000 abstract description 13
- 230000005494 condensation Effects 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 13
- JAYCNKDKIKZTAF-UHFFFAOYSA-N 1-chloro-2-(2-chlorophenyl)benzene Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1Cl JAYCNKDKIKZTAF-UHFFFAOYSA-N 0.000 description 10
- 101100084627 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) pcb-4 gene Proteins 0.000 description 10
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- 238000007710 freezing Methods 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/02—Detecting the presence of frost or condensate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
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Abstract
The invention discloses a microwave detector and an icing and frosting detection device based on the microwave detector, wherein the icing and frosting detection device comprises a radio frequency microwave signal source, a transmitting and receiving antenna and a detector, wherein the radio frequency microwave signal source, the transmitting and receiving antenna and the detector are arranged on a single PCB (printed circuit board); the receiving and transmitting antenna comprises a transmitting antenna and a receiving antenna; the radio frequency microwave signal source is used for generating a radio frequency microwave signal; the transceiver antenna is disposed to be exposed to the air; the transmitting antenna transmits the radio frequency microwave signal outwards, and the receiving antenna receives the microwave signal transmitted by the transmitting antenna and transmits the microwave signal to the detector; the detector is used for receiving the radio frequency microwave signal transmitted by the receiving antenna, converting the energy of the radio frequency microwave signal into a direct current signal and outputting the direct current signal to an external upper computer; the invention is built by only a plurality of separating devices which are arranged on the single PCB, has low cost, small volume and simple structure, can be tightly attached to a condensation sheet of a measured object, and can greatly improve the efficiency of deicing and defrosting.
Description
Technical Field
The invention relates to the technical field of deicing and defrosting industries, in particular to a microwave detector and an icing and frosting detection device based on the microwave detector.
Background
With the improvement of living standard and the requirement of living quality, the refrigerator has become a necessity. In the using process of the refrigerator, the freezing refrigerating chamber is often frozen, and the like, so that the use of the refrigerator is seriously influenced.
Aiming at the problem of icing and frosting of a condenser in the using process of a refrigerator, the current detection and defrosting modes are generally two types: one is to periodically defrost; the other is that a defrosting sensor is used for defrosting when frost is detected. For the periodic defrosting mode, in order to ensure the defrosting effect, no matter whether the surface of the condenser is frosted or not, the periodic defrosting is required, and the energy consumption of the refrigerator is greatly increased. In the mode of passing through the defrosting sensor, the defrosting sensor is required to have higher accuracy, otherwise, the defrosting action is easily triggered by mistake.
The existing defrosting sensor mainly has two methods, namely a mechanical method and a capacitance method. The two icing and frosting sensors have the common characteristics of large volume and high price, and are not beneficial to popularization on white household appliances. In order to achieve the purpose of accurate measurement, the capacitance sensor needs to increase the volume of the capacitance sensor to increase the capacitance volume, however, the larger volume will increase the cost of the whole refrigerator product, and the installation is not suitable.
The above background disclosure is only provided to assist understanding of the inventive concept and technical solutions of the present invention, which do not necessarily belong to the prior art of the present patent application, and should not be used to evaluate the novelty and inventive step of the present application in the case that there is no clear evidence that the above content has been disclosed at the filing date of the present patent application.
Disclosure of Invention
The present invention is directed to a microwave detector and an apparatus for detecting icing and frosting based on the microwave detector, so as to solve at least one of the above-mentioned problems in the related art.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
a microwave probe, comprising: the radio frequency microwave signal source, the receiving and transmitting antenna and the detector are arranged on the single PCB; the receiving and transmitting antenna comprises a transmitting antenna and a receiving antenna; the radio frequency microwave signal source is used for generating a radio frequency microwave signal and sending the radio frequency microwave signal to the transmitting antenna; the transmitting and receiving antenna is set to be exposed in the air so as to detect the icing and frosting phenomena in the environment; the transmitting antenna transmits the radio frequency microwave signal outwards, and the receiving antenna receives the microwave signal transmitted by the transmitting antenna and transmits the microwave signal to the detector; the detector is used for receiving the radio frequency microwave signals transmitted by the receiving antenna, detecting the radio frequency microwave signals, converting the energy of the radio frequency microwave signals into direct current signals and outputting the direct current signals to an external upper computer.
In some embodiments, the radio frequency microwave signal source comprises a power source, a field effect transistor, a microstrip resonator; wherein, a current limiting resistor and a choke capacitor are also arranged between the power supply and the field effect tube.
In some embodiments, the rf microwave signal source is built using a single discrete device; the microstrip resonator is a microstrip line formed on a PCB.
In some embodiments, a dc blocking capacitor is further disposed between the microstrip resonator and the transmitting antenna.
In some embodiments, the transceiver antenna is a microstrip antenna.
In some embodiments, the detector comprises a diode that receives an input signal of a receiving antenna.
In some embodiments, the rf microwave signal source, the transceiver antenna, and the detector are disposed on the same side of the PCB.
In some embodiments, the rf microwave signal source and the detector are respectively disposed at two ends of the PCB, and the transceiver antenna is disposed in the middle of the PCB.
The other technical scheme of the embodiment of the invention is as follows:
an icing and frosting detection device based on a microwave detector comprises the microwave detector, a base, a sealing sheet and a cover plate, wherein the microwave detector is arranged on the base; the PCB, the sealing sheet and the cover plate correspond to the positioning column, and fixing holes are formed in the positioning column and matched with the fixing holes to fix the PCB, the sealing sheet and the cover plate on the base.
In some embodiments, concave openings are arranged on the sealing sheet and the cover plate at positions corresponding to the transmitting and receiving antennas of the microwave detector on the PCB, so that the transmitting and receiving antennas of the microwave detector are exposed to the tested environment.
The technical scheme of the invention has the beneficial effects that:
the microwave detector and the icing and frosting detection device based on the microwave detector are only built by the separating devices, the separating devices are arranged on the single PCB, the cost is low, the size of the detector is small, the structure is simple, the detector can be tightly attached to the condensing sheet, and the deicing and defrosting efficiency can be greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a microwave detector according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a microwave detector on a PCB board according to an embodiment of the invention;
FIG. 3 is a schematic diagram of an equivalent circuit of a microwave detector according to an embodiment of the present invention;
4A-4C are graphical representations of detection signals of a microwave detector according to an embodiment of the present invention;
FIG. 5 is a structural illustration of a microwave detector-based icing frost detection apparatus according to another embodiment of the present invention;
FIG. 6 is an exploded view of a microwave detector-based icing frost detection apparatus according to another embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the embodiments of the present invention clearer and better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The connection may be for fixation or for circuit connection.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings to facilitate the description of the embodiments of the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular manner of operation, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, "plurality" means two or more, and the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As an embodiment of the present invention, a microwave detector and an icing and frosting detection apparatus based on the microwave detector are provided, which can directly detect the icing and frosting condition of an object to be detected, and are low in cost, simple in structure, and beneficial to energy saving and environmental protection.
Fig. 1 is a schematic diagram of a microwave detector for sensing icing and frosting of a measured object according to an embodiment of the present invention, and the microwave detector includes a radio frequency microwave signal source 1, a transmitting/receiving antenna 2, and a detector 3, where the radio frequency microwave signal source 1, the transmitting/receiving antenna 2, and the detector 3 are disposed on a single PCB; the transmitting and receiving antenna 2 comprises a transmitting antenna 20 and a receiving antenna 21; the radio frequency microwave signal source 1 is used for generating a radio frequency microwave signal and sending the radio frequency microwave signal to the transmitting antenna 20; the transmitting and receiving antenna 2 is set to be exposed in the air to detect the icing and frosting phenomena in the environment; the transmitting antenna 20 transmits the radio frequency microwave signal outwards, and the receiving antenna 21 receives the microwave signal transmitted by the transmitting antenna 20 and transmits the microwave signal to the detector; the detector 3 is used for receiving the radio frequency microwave signal transmitted by the receiving antenna 21, detecting the radio frequency microwave signal, converting the energy of the radio frequency microwave signal into a direct current signal, and outputting the direct current signal to an external upper computer. It should be noted that, the external upper computer may adopt the existing technology, so detailed description is not described in the embodiment of the present invention.
Specifically, referring to fig. 2, the radio frequency microwave signal source 1 includes a power supply 10, a field effect transistor 11, and a microstrip resonator 12; a current limiting resistor 13 and a choke capacitor 14 are also provided between the power supply 10 and the field effect transistor 11. In the embodiment of the invention, the radio frequency microwave signal source 1 is constructed by adopting a single separation device, the main separation device is a field effect tube 11, and the microstrip line is used as the microstrip resonator, so that the cost of the whole radio frequency microwave signal source can be greatly reduced, and basically the cost of the field effect tube 11 is the main cost. In some embodiments, the microwave signal source may be formed by an MMIC (monolithic microwave integrated circuit) method, and the field effect transistor, the power supply, the choke capacitor 14, and the current limiting resistor 13 are formed and connected on the semi-insulating semiconductor substrate by a semiconductor process method, so that the size of the microwave signal source may be greatly reduced, and the cost may be reduced.
In some embodiments, the transceiving antenna 2 is a microstrip antenna, and the resonant frequency of the transmitting antenna 20
Wherein, the transmitting antenna 20 and the receiving antenna 21 are set to be exposed in the air of the tested environment to detect the icing condition of the tested environment; when icing and frosting phenomena exist, the antenna can be iced and frosted, the resonant frequency of the transmitting antenna can be changed due to icing and frosting, and therefore the signal energy received by the receiving antenna is changed. In the icing and frosting environment and the non-icing and frosting environment, the resonant frequency of the transmitting antenna is different, so that the energy of the signal received by the wave detector 3 and transmitted by the microwave signal source transmitted by the receiving antenna is changed. In another case, when the icing and frosting phenomenon occurs, icing and frosting may occur between the transmitting antenna 20 and the receiving antenna 21, and the icing and frosting may obstruct the transmission of the electromagnetic wave, that is, the transmission of the electromagnetic wave transmitted by the transmitting antenna, so as to change the energy of the signal received by the receiving antenna, and finally cause the signal received by the wave detector 3 to change.
In some embodiments, a dc blocking capacitor 15 is further disposed between the microstrip resonator 12 and the transmitting antenna 20.
The detector 3 is a passive diode half-wave detection circuit or an active detection circuit. Referring to fig. 3, in the embodiment of the present invention, the detector is a passive diode half-wave detector circuit including a diode D 1 30. Load resistance R load 31 and a capacitor C out 32. Referring to FIG. 4A, a diode D 1 30 receives the input signal of the receiving antenna 21, when the input signal is in positive period and the signal amplitude is larger than the voltage V of the diode DC Time, diode D 1 30 is in forward conduction; when the input signal is in the negative period, i.e. when the input signal is in the negative voltage, the diode D 1 30 is turned off, so that the diode D 1 The output of 30 will form a dc bias level proportional to the signal strength, from which it can be determined whether icing and frosting is occurring. For example, in fig. 4A, S1 represents a periodic signal received by the receiving antenna when there is no icing or frosting, and the periodic signal is incident on the diode D 1 At 30, only the diode D is in the positive period of the periodic signal 1 30 conduction produces a DC component, i.e. t 1 -t 2 The signal output by the diode corresponding to S1 is shown in fig. 4B. S2 is the periodic signal received by the receiving antenna when icing and frosting occur, and the periodic signal is t 1’ -t 2’ The time segments generate a direct current component. The signal output by the diode is shown in fig. 4C, corresponding to S2. As can be seen, according to diode D 1 30, the DC level finally output can detect whether the icing and frosting phenomena occur.
Referring to fig. 2, in some embodiments, the rf microwave signal source 1, the transceiver antenna 2, and the detector 3 are disposed on a single PCB 4, wherein the rf microwave signal source 1, the transceiver antenna 2, and the detector 3 are disposed on the same surface of the PCB 4, and the other surface of the PCB 4 is tightly attached to a condensation sheet of a measured object, so that the microwave detector and the condenser can be frosted synchronously, thereby improving the efficiency and accuracy of frosting detection.
In some embodiments, the rf microwave signal source 1 and the detector 3 are respectively disposed at two ends of the PCB 4, and the transceiver antenna 2 is disposed in the middle of the PCB 4.
In some embodiments, the transceiver antenna 2 is disposed in a square shape at a position on the PCB 4, and the transceiver antenna 2 includes a plurality of strip lines attached to the surface of the PCB, and the plurality of strip lines have the same width and thickness. It should be noted that, in some other embodiments, the transceiver antenna may also be configured in other structural forms, and the embodiments of the present invention are not limited in particular, and any structural form may be adopted without departing from the spirit of the present invention, so long as the present invention falls within the protection scope of the present invention.
The whole microwave detector product is only built by a plurality of separating devices (a power supply, a field effect tube, a capacitor, a resistor and a diode), the separating devices are arranged on the single PCB, the cost is low, the size of the detector is small, the structure is simple, the detector can be tightly attached to a condensing sheet, the frosting efficiency is high, and the synchronous detection of the icing and frosting of the condenser can be realized.
In the embodiment of the invention, the resonator and the transmitting and receiving antenna are microstrip lines formed on a PCB, in practical application, the main devices are a field effect tube, a diode, a capacitor and a resistor, the cost of the capacitor, the cost of the resistor and the cost of the diode are all very low, mainly the cost of the field effect tube, and the cost of the whole detector product can be less than one yuan, so that the cost can be greatly reduced.
Referring to fig. 5 to 6, a device 5 for detecting icing and frost formation based on a microwave detector as another embodiment of the present invention includes the microwave detector according to any of the embodiments, a base 50, a sealing sheet 51 and a cover plate 52; wherein, the microwave detector is integrated on the single PCB 4; the base 50 is provided with a positioning and fixing column 500, the PCB 4, the sealing sheet 51 and the cover plate 52 are provided with a fixing hole 501 corresponding to the positioning column 500, and the PCB 4, the sealing sheet 51 and the cover plate 52 are fixed on the base 50 through the matching of the fixing hole 501 and the positioning and fixing column 500.
In some embodiments, the sealing plate 51 and the cover plate 52 are provided with a concave opening 502 corresponding to the position of the transceiver antenna (microstrip line) of the microwave detector on the PCB 4, so that the transceiver antenna of the microwave detector is exposed to the tested environment.
In some embodiments, the sealing plate is provided with a square opening 510 corresponding to the rf microwave signal source of the microwave detector and the position of the detector on the PCB board.
In some embodiments, the shape of the sealing plate 51 is substantially the same as the shape of the cover plate 52, and the thickness of the sealing plate 51 is less than the thickness of the cover plate 52.
In the embodiment of the present invention, the icing and frosting detection device is used for detecting the icing and frosting condition of the refrigerator, it can be understood that the present invention is not limited to the icing and frosting detection of the refrigerator, and the present invention can also be applied to refrigeration equipment such as an air conditioner, etc., and is not limited herein; in any case, the invention should be protected as long as it is the same as the principle scheme of the invention. In the embodiment of the invention, the detected environment is a refrigerator, and the measured physical quantity is the icing and frosting condition of the refrigerator.
It is to be understood that when the detector of the present invention is embodied in a device or hardware, corresponding structural or component changes may be made to accommodate the needs, the nature of which still employs the detector of the present invention and, therefore, should be considered as within the scope of the present invention. The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that numerous alterations and modifications can be made to the described embodiments without departing from the inventive concepts herein, and such alterations and modifications are to be considered as within the scope of the invention. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention.
In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the invention as defined by the appended claims.
Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. One of ordinary skill in the art will readily appreciate that the above-disclosed, presently existing or later to be developed, processes, machines, manufacture, compositions of matter, means, methods, or steps, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
Claims (10)
1. A microwave probe, comprising: the radio frequency microwave signal source, the receiving and transmitting antenna and the detector are arranged on the single PCB; the receiving and transmitting antenna comprises a transmitting antenna and a receiving antenna; the radio frequency microwave signal source is used for generating a radio frequency microwave signal and sending the radio frequency microwave signal to the transmitting antenna; the transmitting and receiving antenna is set to be exposed in the air so as to detect the icing and frosting phenomena in the environment; the transmitting antenna transmits the radio frequency microwave signal outwards, and the receiving antenna receives the microwave signal transmitted by the transmitting antenna and transmits the microwave signal to the detector; the detector is used for receiving the radio frequency microwave signals transmitted by the receiving antenna, detecting the radio frequency microwave signals, converting the energy of the radio frequency microwave signals into direct current signals and outputting the direct current signals to an external upper computer.
2. A microwave probe as claimed in claim 1, wherein: the radio frequency microwave signal source comprises a power supply, a field effect tube and a microstrip resonator; wherein, a current limiting resistor and a choke capacitor are also arranged between the power supply and the field effect tube.
3. A microwave probe according to claim 2, wherein: the radio frequency microwave signal source is built by adopting a single separating device; the microstrip resonator is a microstrip line formed on a PCB.
4. A microwave probe as claimed in claim 2, wherein: and a DC blocking capacitor is also arranged between the microstrip resonator and the transmitting antenna.
5. A microwave probe as claimed in claim 1, wherein: the receiving and transmitting antenna is a microstrip antenna.
6. A microwave probe according to claim 1, wherein: the detector comprises a diode, and the diode receives an input signal of a receiving antenna.
7. A microwave probe as claimed in claim 1, wherein: the radio frequency microwave signal source, the receiving and transmitting antenna and the detector are arranged on the same surface of the PCB.
8. A microwave probe according to claim 7, wherein: the radio frequency microwave signal source and the detector are respectively arranged at two ends of the PCB, and the transmitting-receiving antenna is arranged in the middle of the PCB.
9. The utility model provides an icing detection device that frosts based on microwave detector which characterized in that: comprising the microwave detector of any one of claims 1-8, a base, a sealing plate, and a cover plate; the PCB, the sealing sheet and the cover plate correspond to the positioning column, and fixing holes are formed in the positioning column and matched with the fixing holes to fix the PCB, the sealing sheet and the cover plate on the base.
10. A microwave detector-based icing frost detection apparatus according to claim 9 wherein: the sealing strip and the cover plate are provided with concave openings corresponding to the positions of the transmitting and receiving antennas of the microwave detector on the PCB, so that the transmitting and receiving antennas of the microwave detector are exposed in a tested environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210602158.0A CN115032701A (en) | 2022-05-30 | 2022-05-30 | Microwave detector and icing and frosting detection device based on same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210602158.0A CN115032701A (en) | 2022-05-30 | 2022-05-30 | Microwave detector and icing and frosting detection device based on same |
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| CN115032701A true CN115032701A (en) | 2022-09-09 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09214389A (en) * | 1996-02-07 | 1997-08-15 | Mitsubishi Electric Corp | Radio communication equipment |
| CN101738641A (en) * | 2008-11-27 | 2010-06-16 | 武光杰 | Microwave motion sensor |
| CN102043147A (en) * | 2009-10-19 | 2011-05-04 | 武光杰 | Microwave sensor |
| JP2013160414A (en) * | 2012-02-02 | 2013-08-19 | Kyushu Electric Power Co Inc | Frost formation detection device |
| CN107238609A (en) * | 2017-05-18 | 2017-10-10 | 孟敏 | Icing frosting detection device and method based on microwave |
| CN109708250A (en) * | 2018-12-29 | 2019-05-03 | 珠海格力电器股份有限公司 | Frost layer detection method and device and household electrical appliance |
-
2022
- 2022-05-30 CN CN202210602158.0A patent/CN115032701A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09214389A (en) * | 1996-02-07 | 1997-08-15 | Mitsubishi Electric Corp | Radio communication equipment |
| CN101738641A (en) * | 2008-11-27 | 2010-06-16 | 武光杰 | Microwave motion sensor |
| CN102043147A (en) * | 2009-10-19 | 2011-05-04 | 武光杰 | Microwave sensor |
| JP2013160414A (en) * | 2012-02-02 | 2013-08-19 | Kyushu Electric Power Co Inc | Frost formation detection device |
| CN107238609A (en) * | 2017-05-18 | 2017-10-10 | 孟敏 | Icing frosting detection device and method based on microwave |
| CN109708250A (en) * | 2018-12-29 | 2019-05-03 | 珠海格力电器股份有限公司 | Frost layer detection method and device and household electrical appliance |
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