CN105758064A - Self-cleaned photoelectric frost thickness sensor - Google Patents
Self-cleaned photoelectric frost thickness sensor Download PDFInfo
- Publication number
- CN105758064A CN105758064A CN201610133592.3A CN201610133592A CN105758064A CN 105758064 A CN105758064 A CN 105758064A CN 201610133592 A CN201610133592 A CN 201610133592A CN 105758064 A CN105758064 A CN 105758064A
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- Prior art keywords
- frost
- main body
- survey
- transmitting set
- optical receiver
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Classifications
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a self-cleaned photoelectric frost thickness sensor which comprises a gear motor, a motor fixing part, a connecting main body, a positioning light emitter, a positioning light receiver, a shaft sleeve, a brush, a frost testing light emitter, a frost testing light receiver, a heat conduction part, a sensor fixing part, a front cover plate, a rear cover plate and a top cover plate, wherein the gear motor is mounted on a side of the connecting main body through the motor fixing part; the brush is fixed on a motor shaft; the heat conduction part is embedded in a groove on the bottom side of the connecting main body; the top of the heat conduction part extends outside the lower surface of the inner side of the connecting main body; the frost testing light emitter and the frost testing light receiver are respectively arranged on two sides of the heat conduction part; the positioning light emitter and the positioning light receiver are respectively arranged at the top end of the connecting main body; the heat conduction part is connected with the sensor fixing part; the connecting main body is made of a power and thermal insulating material; the heat conduction part is made of a heat conduction material. The self-cleaned photoelectric frost thickness sensor has the beneficial effects that frost thickness of refrigeration devices such as an air source heat pump unit and a heat pump room air-conditioner can be stably and effectively directly measured, and the accident of 'mal-defrosting' of the refrigeration devices can be avoided.
Description
Technical field
The present invention relates to a kind of self-cleaning photoelectricity frost thickness sensor, specifically, it is for the refrigerating plant such as net for air-source heat pump units, heat pump type room air conditioner, utilize photoelectric conversion technique, realize frost thickness monitoring, and utilize hairbrush sweep frost mode realize sensor automatically cleaning, in conjunction with lamina tecti hide water measure, it is to avoid the waterproof of sensor own, draining, dirty stifled problem sensor.
Background technology
Frosting is the key issue affecting the refrigerating plant heating performance such as net for air-source heat pump units, heat pump type room air conditioner with runnability.The growth of frost layer increases the heat transfer resistance of heat exchanger, reduces air mass flow, it is necessary to carry out defrosting operation.Existing defrosting control methods includes: 1) time defrosting control methods；2) Temperature-time defrosting control methods；3) dual sensor indoor, outdoor defrosting control methods；4) temperature difference-time defrosting control methods；5) air pressure difference defrosting control methods；6) Maximum average heating capacity defrosting control methods；7) refrigerant superheat degree defrosting control methods；8) blower fan electric current and evaporating temperature jointly control defrosting；9) comprehensive frosting index (FI) carries out the defrosting control methods that judges；10) self-correction defrosting control methods；11) fuzzy intelligentcontrol defrosting. above defrosting control method, by measuring the temperature etc. on frosting condition such as air themperature, cold surface, or by measuring the change etc. of the change of by-product such as coil temperature of frosting, refrigerant flow, as defrosting judge foundation, and and the non-immediate existence to frost layer and thickness measurement.Therefore, in actual motion, often there is " by mistake defrosting " accident of " having frost not remove " and " frostless defrosting " in the refrigerating plant such as net for air-source heat pump units, heat pump type room air conditioner.Photoelectricity transformation principle is applied to the monitoring of frost thickness and has irreplaceable advantage, but can cause Signal Fail due to waterproof, draining, dirty stifled problem, control degree of stability it cannot be guaranteed that.Therefore, the generation of " by mistake defrosting " accident for avoiding, it is necessary to a kind of frost thickness can be carried out sensor direct, accurate, stability monitoring.
Summary of the invention
It is an object of the invention to provide a kind of self-cleaning photoelectricity frost thickness sensor, it is utilize photoelectricity transformation principle, the mode that frost swept by hairbrush is adopted to ensure its job stability, reliability, for the sensor that the defrosting of the refrigerating plant such as net for air-source heat pump units, heat pump type room air conditioner controls.
In order to solve above-mentioned technical problem, self-cleaning photoelectricity frost thickness sensor provided by the invention, mainly includes reducing motor (1), motor fixture (2), connection main body (3), location optical transmitting set (4), location optical receiver (5), axle sleeve (6), hairbrush (7), surveys frost optical transmitting set (8), survey frost optical receiver (9), heat-conducting piece (10), sensor fixture (11), front shroud (12), back shroud (13).
Connecting main body (3) is the structure with cuboid cavity, the one side connecting main body (3) has through hole, reducing motor (1) is fixed in this hole by motor fixture (2), the rotating shaft of reducing motor (1) is positioned at connection main body (3) cavity, and hairbrush (7) is fixed in the rotating shaft of reducing motor (1) by axle sleeve (6)；The outer side bottom surface connecting main body (3) has groove, has a through hole straight-through connection main body (3) inner chamber in groove；Heat-conducting piece (10) one side has most advanced and sophisticated projection, and relative another side has semicircle column type groove；The one side of sensor fixture (11) is provided with semicircle column type groove, sensor fixture (11) and heat-conducting piece (10) can be bolted to connection, sensor fixture (11) semicircle column type groove is relative with the semicircle column type groove of sensor fixture (11) constitutes a cylindrical hole, is used for placing refrigerating plant to be measured；The most advanced and sophisticated projection of heat-conducting piece (10) is protruded in connection main body (3) cavity by connecting the through hole in main body (3) groove；Fixing survey frost optical transmitting set (8) is placed respectively in the both sides connecting the most advanced and sophisticated projection of bottom surface heat-conducting piece (10) in main body (3) cavity, survey frost optical receiver (9), survey frost optical transmitting set (8) and survey frost optical receiver (9) is correlation slot optical coupling, survey frost optical transmitting set (8) and launch optical signal by bar seam, survey frost optical receiver (9) and sew up, by bar, the optical signal that receipts survey frost optical transmitting set (8) send, survey frost optical transmitting set (8), the bar seam surveying frost optical receiver (9) is parallel, and bar seam lower end is all concordant with the most advanced and sophisticated protruding apex of heat-conducting piece (10)；Optical transmitting set (4), location optical receiver (5) is positioned connecting upper end face fixed placement respectively in main body (3) cavity, location optical transmitting set (4) and location optical receiver (5) have and are respectively provided with bar seam, and the bar seam of location optical transmitting set (4) and location optical receiver (5) is identical with the bar crack structure surveying white optical transmitting set (8) and the white optical receiver (9) of survey；Survey above corresponding location optical transmitting set (4) of frost optical transmitting set (8), survey frost optical receiver (9) corresponding location optical receiver (5) above；Hairbrush (7) can dock with the most advanced and sophisticated projection of heat-conducting piece (10) substantially mutually；Connect main body (3) cavity and be provided with front shroud (12) and back shroud (13)；Front shroud (12) is relative with back shroud (13), and front shroud (12) and back shroud (13) are each perpendicular to connect main body (3) cavity side, upper end face and bottom surface；Location optical transmitting set (4) and location optical receiver (5) are fixed on back shroud (13), and cover plate (13) is provided with bar seam, by bar seam, hairbrush (7) are carried out bullet white or dirty；Survey frost optical transmitting set (8) and survey frost optical receiver (9) is fixed on front shroud (12).
Also being stamped a lamina tecti (14) connecting above the upper end face of main body (3), lamina tecti (14) is with downward-sloping edge, it is prevented that rainwater enters and connects main body (3).
The present invention is rotated with electric brush (7) by reducing motor (1) rotating shaft and realizes sensor internal and survey the automatically cleaning of frost section, surveys frost section and refers to by heat-conducting piece (10) top and frost optical transmitting set (8), surveys frost optical receiver (9) sensor that constitutes and survey the core position of frost.nullWherein reducing motor (1) is fixed together with being connected main body (3) by motor fixture (2)，Hairbrush (7) is linked together by axle sleeve (6) and reducing motor (1) rotating shaft，Heat-conducting piece (10) is nested in the groove connecting main body (3)，Connecting main body (3) is " returning " font blocks，Interior " mouth " character segment is cavity，" mouth " word cavity lower surface in connection main body (3) is stretched out at heat-conducting piece (10) top，Heat-conducting piece (10) both sides, top place survey frost optical transmitting set (8) respectively、Survey frost optical receiver (9)，For measuring heat-conducting piece (10) top frost level，Survey frost optical transmitting set (8)、Surveying frost optical receiver (9) is correlation slot optical coupling，Survey frost optical transmitting set 8 and launch optical signal by bar seam，Survey frost optical receiver 9 and sew up, by bar, the optical signal that receipts survey frost optical transmitting set (8) send，Survey frost optical transmitting set (8)、The bar seam of survey frost optical receiver (9) is parallel and bar seam lower surface is concordant with heat-conducting piece (10) top，Survey frost optical transmitting set (8)、Survey frost optical receiver (9) and be fixed on front shroud (12)，Survey frost optical transmitting set (8)、Survey frost optical receiver (9) upside placement positioning optical transmitting set (4)、Location optical receiver (5)，For determining the final stop position of hairbrush，Location optical transmitting set (4)、Location optical receiver (5) bar seam is parallel，It is fixed on back shroud (13)，Back shroud (13) bar seam tip height is generally below hairbrush (7) rotary motion trace，When hairbrush (7) rotation process has been cleared up the frost or dirt of surveying frost section，All carry out bullet in back shroud (13) bar seam top white or dirty.Lamina tecti (14), with downward-sloping edge, is fixed on connection body top, and heat-conducting piece (10) is connected with sensor fixture (11).Described connection main body (3), sensor fixture (11) are insulation, adiabatic material, and heat-conducting piece (10) is heat-conducting.
The invention has the beneficial effects as follows: the response of (1) output voltage signal is sensitive；(2) sensor automatically cleaning can be realized, so as to working stability；(3) the defrosting operation of the refrigerating plant such as net for air-source heat pump units, heat pump type room air conditioner can effectively be controlled；(4) generation of the refrigerating plant such as net for air-source heat pump units, heat pump type room air conditioner " by mistake defrosting " accident can be avoided；(5) easy for installation, simple to operate, the suitability is strong.
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail:
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention self-cleaning photoelectricity frost thickness sensor, for the sectional view of front view:
In figure, 1 reducing motor, 2 motor fixture, 3 connection main bodys, 4 location optical transmitting sets, 5 location optical receivers, 6 axle sleeves, 7 hairbrush, 8 survey frost optical transmitting sets, 9 survey frost optical receiver, 10 heat-conducting pieces, 11 sensor fixture.
Fig. 2,3 it is that the front and rear cover plate of the present invention self-cleaning photoelectricity frost thickness sensor shows front view respectively, Fig. 4,5 is front sectional view and the top view of lamina tecti respectively:
In figure, 12 front shrouds, 13 back shrouds, 14 lamina tectis.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described, but the present invention is not limited to following example.
Embodiment 1
Embodiments of the present invention shown in Fig. 1～4 are it can be seen that self-cleaning photoelectricity frost thickness sensor mainly includes reducing motor 1, motor fixture 2, connection main body 3, location optical transmitting set 4, location optical receiver 5, axle sleeve 6, hairbrush 7, surveys frost optical transmitting set 8, survey frost optical receiver 9, heat-conducting piece 10, sensor fixture 11, front shroud 12, back shroud 13 and lamina tecti 14.
Wherein, reducing motor 1 is fixed together with being connected main body 3 by motor fixture 2, and connecting main body 3 is adiabatic, isolation material, can be selected for nylon, bakelite etc..Hairbrush 7 is linked together by axle sleeve 6 and reducing motor 1 rotating shaft, and hairbrush material should be soft, wear-resisting.nullHeat-conducting piece 10 is nested in the groove connecting main body 3，Connecting main body 3 is " returning " font blocks，Interior " mouth " character segment is cavity，" mouth " word cavity lower surface in connection main body 3 is stretched out at heat-conducting piece 10 top，Heat-conducting piece 10 material is heat-conducting，Optional copper or aluminum are as material，Both sides, heat-conducting piece 10 top place survey frost optical transmitting set 8 respectively、Survey frost optical receiver 9，Survey frost optical transmitting set 8、Surveying frost optical receiver 9 is correlation slot optical coupling，Survey frost optical transmitting set 8 and launch optical signal by bar seam，Survey frost optical receiver 9 and sew up, by bar, the optical signal that receipts survey frost optical transmitting set 8 sends，Survey frost optical transmitting set 8、The bar seam of survey frost optical receiver 9 is parallel and bar seam lower surface is concordant with heat-conducting piece 10 top，Survey frost optical transmitting set 8、Survey frost optical receiver 9 and be fixed on front shroud 12，Survey frost optical transmitting set 8、Survey placement positioning optical transmitting set 4 on the upside of frost optical receiver 9、Location optical receiver 5，Location optical transmitting set 4、Location optical receiver 5 seam is parallel，It is fixed on back shroud 13，Back shroud 13 seam height is lower than hairbrush 7 rotary motion trace，All carry out bullet after making to sweep frost or dirt white or dirty every time.Lamina tecti 14 is fixed on connection body top, and lamina tecti 14 has the edge of downward angle, overboard to block environment.
Sensor fixture 11 is utilized to be fixed on heat exchange manifold by heat-conducting piece 10, make heat-conducting piece 10 and the close contact of heat exchanger tube outside wall surface, when exchanger tube wall frosting, the top of heat-conducting piece 10 also can frosting, corresponding variation will be there is in the output voltage now surveying frost optical receiver 9, can determine whether the frosting degree of the refrigerating plant such as net for air-source heat pump units, heat pump type room air conditioner according to signal intensity amplitude, and then judge whether to perform defrosting operation.In unit defrosting process, sensor internal is rotated by reducing motor 1 band electric brush 7, frost is swept in heat-conducting piece top by hairbrush 7 rotation process, and owing to back shroud 13 seam height is lower than hairbrush 7 rotary motion trace, therefore hairbrush 7 all can carry out once bullet frost in bonnet lath seam top end after sweeping frost every time, to ensure that frost does not stop on hairbrush 7 as far as possible.After defrosting terminates, hairbrush 7 judges its position by positioning the signal of optical receiver 5, it is made to rest against on the upside of sensor internal, principle is when hairbrush 7 just blocks the optical signal of location optical transmitting set 4, location optical receiver 5 can export corresponding change in voltage, thus judging that hairbrush 7 is now exactly on the upside of sensor internal, now stop the power supply to reducing motor 1.Before unit starts heating, sensor rotates cleaning by hairbrush 7 and surveys frost optical transmitting set 4 and the dirt surveyed between frost optical receiver 5, to ensure clean conditions when sensor is formally devoted oneself to work, it is ensured that certainty of measurement.
Claims (3)
1. self-cleaning photoelectricity frost thickness sensor, it is characterized in that, mainly include reducing motor (1), motor fixture (2), connection main body (3), location optical transmitting set (4), location optical receiver (5), axle sleeve (6), hairbrush (7), survey frost optical transmitting set (8), survey frost optical receiver (9), heat-conducting piece (10), sensor fixture (11), front shroud (12), back shroud (13)；
Connecting main body (3) is the structure with cuboid cavity, the one side connecting main body (3) has through hole, reducing motor (1) is fixed in this hole by motor fixture (2), the rotating shaft of reducing motor (1) is positioned at connection main body (3) cavity, and hairbrush (7) is fixed in the rotating shaft of reducing motor (1) by axle sleeve (6)；The outer side bottom surface connecting main body (3) has groove, has a through hole straight-through connection main body (3) inner chamber in groove；Heat-conducting piece (10) one side has most advanced and sophisticated projection, and relative another side has semicircle column type groove；The one side of sensor fixture (11) is provided with semicircle column type groove, sensor fixture (11) and heat-conducting piece (10) can be bolted to connection, sensor fixture (11) semicircle column type groove is relative with the semicircle column type groove of sensor fixture (11) constitutes a cylindrical hole, is used for placing refrigerating plant to be measured；The most advanced and sophisticated projection of heat-conducting piece (10) is protruded in connection main body (3) cavity by connecting the through hole in main body (3) groove；Fixing survey frost optical transmitting set (8) is placed respectively in the both sides connecting the most advanced and sophisticated projection of bottom surface heat-conducting piece (10) in main body (3) cavity, survey frost optical receiver (9), survey frost optical transmitting set (8) and survey frost optical receiver (9) is correlation slot optical coupling, survey frost optical transmitting set (8) and launch optical signal by bar seam, survey frost optical receiver (9) and sew up, by bar, the optical signal that receipts survey frost optical transmitting set (8) send, survey frost optical transmitting set (8), the bar seam surveying frost optical receiver (9) is parallel, and bar seam lower end is all concordant with the most advanced and sophisticated protruding apex of heat-conducting piece (10)；Optical transmitting set (4), location optical receiver (5) is positioned connecting upper end face fixed placement respectively in main body (3) cavity, location optical transmitting set (4) and location optical receiver (5) have and are respectively provided with bar seam, and the bar seam of location optical transmitting set (4) and location optical receiver (5) is identical with the bar crack structure surveying white optical transmitting set (8) and the white optical receiver (9) of survey；Survey above corresponding location optical transmitting set (4) of frost optical transmitting set (8), survey frost optical receiver (9) corresponding location optical receiver (5) above；Hairbrush (7) can dock with the most advanced and sophisticated projection of heat-conducting piece (10) substantially mutually；Connect main body (3) cavity and be provided with front shroud (12) and back shroud (13)；Front shroud (12) is relative with back shroud (13), and front shroud (12) and back shroud (13) are each perpendicular to connect main body (3) cavity side, upper end face and bottom surface；Location optical transmitting set (4) and location optical receiver (5) are fixed on back shroud (13), and cover plate (13) is provided with bar seam, by bar seam, hairbrush (7) are carried out bullet white or dirty；Survey frost optical transmitting set (8) and survey frost optical receiver (9) is fixed on front shroud (12).
2. self-cleaning photoelectricity frost thickness sensor according to claim 1, it is characterised in that described connection main body (3), sensor fixture (11) are insulation, adiabatic material；Heat-conducting piece (10) is heat-conducting.
3. self-cleaning photoelectricity frost thickness sensor according to claim 1, it is characterized in that, a lamina tecti (14) also it is stamped above the upper end face of main body (3) connecting, lamina tecti (14) is with downward-sloping edge, and preventing and treating rainwater enters and connects main body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610133592.3A CN105758064B (en) | 2016-03-09 | 2016-03-09 | A kind of self-cleaning thick sensor of photoelectricity frost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610133592.3A CN105758064B (en) | 2016-03-09 | 2016-03-09 | A kind of self-cleaning thick sensor of photoelectricity frost |
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| Publication Number | Publication Date |
|---|---|
| CN105758064A true CN105758064A (en) | 2016-07-13 |
| CN105758064B CN105758064B (en) | 2018-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610133592.3A Active CN105758064B (en) | 2016-03-09 | 2016-03-09 | A kind of self-cleaning thick sensor of photoelectricity frost |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166679A (en) * | 2017-06-22 | 2017-09-15 | 广东工业大学 | A kind of frosting cloud test method and system |
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| CN102435145A (en) * | 2011-10-27 | 2012-05-02 | 海尔集团公司 | Sensor capable of sensing frost thickness, refrigerator having sensor and working method thereof |
| GB2488331A (en) * | 2011-02-23 | 2012-08-29 | Star Refrigeration | Heat pump system with a thermal store comprising a phase change material |
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| CN104684769A (en) * | 2011-12-08 | 2015-06-03 | 大陆汽车系统公司 | Vehicle mounted optical and sensor cleaning system |
| CN205641683U (en) * | 2016-03-09 | 2016-10-12 | 北京工业大学 | Thick sensor of photoelectricity frost of automatically cleaning |
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- 2016-03-09 CN CN201610133592.3A patent/CN105758064B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20100134426A (en) * | 2009-06-15 | 2010-12-23 | 벽산건설 주식회사 | Air handling unkt system of lowering the energy consumption using ground source heat pump and heat recovery coil |
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| CN102435145A (en) * | 2011-10-27 | 2012-05-02 | 海尔集团公司 | Sensor capable of sensing frost thickness, refrigerator having sensor and working method thereof |
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| CN107166679A (en) * | 2017-06-22 | 2017-09-15 | 广东工业大学 | A kind of frosting cloud test method and system |
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| CN105758064B (en) | 2018-06-19 |
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