CN104481855B - A kind of control circuit of agricultural greenhouse geothermal heating system - Google Patents
A kind of control circuit of agricultural greenhouse geothermal heating system Download PDFInfo
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- CN104481855B CN104481855B CN201410762502.8A CN201410762502A CN104481855B CN 104481855 B CN104481855 B CN 104481855B CN 201410762502 A CN201410762502 A CN 201410762502A CN 104481855 B CN104481855 B CN 104481855B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 230000010365 information processing Effects 0.000 claims abstract description 6
- 239000003054 catalyst Substances 0.000 claims description 30
- 210000001699 lower leg Anatomy 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 235000013399 edible fruits Nutrition 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 210000002808 connective tissue Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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Abstract
A kind of control circuit of agricultural greenhouse geothermal heating system, relate to the temperature control circuit of agricultural greenhouse, it is made up of power circuit, information-processing circuit and control output circuit, the outfan of integrated package of pressure-stabilizing constitutes DC supply after being connected with the positive pole of filter capacitor b, and the earth terminal of the negative pole of bridge rectifier, the negative pole of filter capacitor a, the negative pole of filter capacitor b and integrated package of pressure-stabilizing constitutes ground wire after connecting；Feed end is connected to DC supply, ceiling temperature signal end is connected to two inputs of NAND gate b, the outfan of NAND gate b is connected to the first input end of NAND gate c, the outfan of NAND gate c is connected to the second input of NAND gate d, lower limit temperature signal end is connected to two inputs of NAND gate a, the outfan of NAND gate a is connected to the first input end of NAND gate d, and the outfan of NAND gate d is connected to the second input of NAND gate c.The present invention makes thermal cycle water pump rationally run, and saves manpower and avoids waste of energy.
Description
Technical field
The present invention relates to a kind of electronic circuit, be related specifically to the temperature control circuit of agricultural greenhouse.
Background technology
Agricultural greenhouse is a kind of framework structure of film with heat-insulating property, and its appearance makes people can have vegetables in improper season and fruit.General agricultural greenhouse uses bamboo structure or the skeleton of steel construction, is covered with one or more layers thermal insulation plastic film above, material is thus formed a greenhouse space.Adventitia stops the loss of carbon dioxide produced by internal vegetable growth well, has good heat insulation effect in making canopy.
When night or the rainy weather in winter, the temperature in agricultural greenhouse is too low, and unfavorable fruit and vegerable grow, and affect fruit-vegetable quality and yield.Utilize underground heat that agricultural greenhouse is heated and there is the important meaning of energy-conservation and GHG emissions mitigation, when the temperature in agricultural greenhouse is too low, pump with pump handle geothermal water, the most in a looping fashion by radiator to carrying out heat release in agricultural greenhouse, build the environment of favourable fruit and vegerable growth, improve fruit-vegetable quality and yield.Automatically running of agricultural greenhouse thermal cycle water pump needs a kind of control circuit.
Summary of the invention
The invention aims to provide a kind of control circuit for automatically running of agricultural greenhouse thermal cycle water pump, make thermal cycle water pump rationally run, build the temperature environment of favourable fruit and vegerable growth for agricultural greenhouse, save manpower and avoid waste of energy.
nullA kind of control circuit of the agricultural greenhouse geothermal heating system of the present invention，It is characterized in that control circuit is by power circuit、Information-processing circuit and control output circuit composition，Wherein，The structure of power circuit is: the primary coil of rectifier transformer (TC) is connected to the phase line input (2) of power supply and the zero line input (1) of power supply，The secondary coil of rectifier transformer (TC) is connected to two inputs of bridge rectifier (VD)，The positive pole of bridge rectifier (VD) is connected to filter capacitor a(C1) positive pole and the input of integrated package of pressure-stabilizing (IC1)，The outfan of integrated package of pressure-stabilizing (IC1) and filter capacitor b(C2) positive pole be connected after constitute DC supply (V+)，The negative pole of bridge rectifier (VD)、Filter capacitor a(C1) negative pole、Filter capacitor b(C2) negative pole and integrated package of pressure-stabilizing (IC1) earth terminal connect after constitute ground wire；The structure of information-processing circuit is: feed end (5) is connected to DC supply (V+), ceiling temperature signal end (4) is connected to NAND gate b(IC3) two inputs, NAND gate b(IC3) outfan be connected to NAND gate c(IC4) first input end, NAND gate c(IC4) outfan be connected to NAND gate d(IC5) the second input, lower limit temperature signal end (3) is connected to NAND gate a(IC2) two inputs, NAND gate a(IC2) outfan be connected to NAND gate d(IC5) first input end, NAND gate d(IC5) outfan be connected to NAND gate c(IC4) the second input；Control output circuit structure be: drive resistance (R3) the first foot be connected to NAND gate d(IC5) outfan, the crus secunda driving resistance (R3) is connected to the base stage of audion (V2), the emitter stage of audion (V2) is connected to ground wire, the colelctor electrode of audion (V2) is connected to anode and second end of relay coil (K) of clamp diode (V1), the negative electrode of clamp diode (V1) and the first end of relay coil (K) are connected to DC supply (V+), contact switch (K1) first end of relay is connected to control end a(6), contact switch (K1) second end of relay is connected to control end b(7).
In the present invention, in NAND gate a(IC2) two road of You Bang between input and ground wire resistance a(R1)；In NAND gate b(IC3) two road of You Bang between input and ground wire resistance b(R2)；NAND gate a(IC2), NAND gate b(IC3), NAND gate c(IC4) and NAND gate d(IC5) share a NAND gate integrated circuit with four group of two input, the power end of integrated circuit is connected to DC supply (V+), and the earth terminal of integrated circuit is connected to ground wire；The outer of control circuit is with electric contact thermometer (TK), the indicator electrode of electric contact thermometer (TK) is connected to feed end (5), the lower limit electrode of electric contact thermometer (TK) is connected to lower limit temperature signal end (3), and the upper limit electrode of electric contact thermometer (TK) is connected to ceiling temperature signal end (4)；The outer of control circuit is with catalyst, thermorelay (FR), three-phase and four-line supply line and water circulating pump, catalyst includes coil (KM) and three groups of main contacts switches, three-phase and four-line supply line includes wire a(U), wire b(V), wire c(W) and zero line (N), the zero line input (1) of control circuit is connected on the zero line (N) of supply line, the phase line input (2) of control circuit is connected to wire a(U) on, coil (KM) first end of catalyst is connected to wire b(V) on, coil (KM) second end of catalyst is connected to the control end a(6 of control circuit) on, the control end b(7 of control circuit) it is connected to switch second end of thermorelay (FR), switch first end of thermorelay (FR) is connected to wire c(W) on；The upper end of three groups of main contacts switch of catalyst is connected respectively to wire a(U), wire b(V) and wire c(W) on, the lower end of three groups of main contacts switches of catalyst is passed through thermorelay (FR) and is connected on the motor winding of water circulating pump.
When the present invention applies, wire a(U), wire b(V) and wire c(W) be connected to phase line a(L1 of power supply by QS. automatic cut-off switch), phase line b(L2 of power supply) and phase line c(L3 of power supply) on, the temperature-sensitive bag of electric contact thermometer (TK) is arranged in agricultural greenhouse, the lower limit temperature of electric contact thermometer (TK) is arranged between 12 °-15 °, the ceiling temperature of electric contact thermometer (TK) is arranged between 18 °-20 °.nullDuring work，Close automatic cut-off switch (QS)，Control circuit is devoted oneself to work，When dropping to the lower limit temperature set at temperature in agricultural greenhouse，The indicator of electric contact thermometer (TK) touches lower limit electrode，High level enters into NAND gate a(IC2) two inputs，Make NAND gate a(IC2) outfan and NAND gate d(IC5) first input end be low level，NAND gate d(IC5) outfan be high level，Audion (V2) turns on，Coil (K) energising of relay，Contact switch (K1) Guan Bi of relay，The coil (KM) making catalyst is energized，Main contacts switch (KM-K) adhesive of catalyst，Threephase motor (M) energising of water circulating pump，Water circulating pump runs，Agricultural greenhouse is heated by pumping underground hot water in a looping fashion by radiator；At this moment, NAND gate b(IC3) two inputs be low level, NAND gate b(IC3) outfan and NAND gate c(IC4) first input end be high level, NAND gate d(IC5) high level of outfan feeds back to NAND gate c(IC4) the second input, when NAND gate c(IC4) two inputs when being all high level, NAND gate c(IC4) outfan and NAND gate d(IC5) the second input be low level；When the indicator of electric contact thermometer (TK) is lifted off lower limit electrode, NAND gate a(IC2) two inputs revert to low level, NAND gate a(IC2) outfan and NAND gate d(IC5) first input end be reversed to high level, at this moment, due to NAND gate d(IC5) the second input be low level, therefore, NAND gate d(IC5) outfan still keep high level, maintain water circulating pump to run；nullWhen the room temperature in agricultural greenhouse rises to the ceiling temperature set，The indicator of electric contact thermometer (TK) touches upper limit electrode，NAND gate b(IC3) two inputs be high level，NAND gate b(IC3) outfan and NAND gate c(IC4) first input end be reversed to low level，Make NAND gate c(IC4) outfan and NAND gate d(IC5) the second input be reversed to high level，At this moment，NAND gate d(IC5) two inputs be all high level，Make NAND gate d(IC5) outfan be reversed to low level，Audion (V2) ends，Coil (K) power-off of relay，Contact switch (K1) release of relay disconnects，Make coil (KM) power-off of catalyst，Main contacts switch (KM-K) release of catalyst disconnects，Threephase motor (M) power-off of water circulating pump，Water circulating pump stops.
When three-phase power line phase shortage; the present invention has open-phase protection effect; phase line a(L1 such as power supply) short of electricity pressure time; the control circuit power-off of the present invention quits work; the contact switch (K1) of relay can not adhesive; the coil (KM) of catalyst can not be energized, and the threephase motor (M) of water circulating pump will not be energized；Phase line b(L2 such as power supply) or phase line c(L3 of power supply) lack arbitrary phase voltage time, the coil (KM) of catalyst can not be energized, and the threephase motor (M) of water circulating pump will not be energized equally, serves the effect of open-phase protection.
In above-mentioned invention, use a NAND gate integrated circuit with four group of two input to process information, control operation or the stopping of water circulating pump according to the lower limit temperature set or ceiling temperature, have the advantages that circuit structure is simple and cost is low.
The invention has the beneficial effects as follows: the control circuit of a kind of agricultural greenhouse geothermal heating system of offer, lower limit temperature that water circulating pump sets by agricultural greenhouse or ceiling temperature is made automatically to run or stop, build the temperature environment of favourable fruit and vegerable growth for agricultural greenhouse, save manpower and avoid waste of energy.The present invention has circuit default-phase protection function simultaneously.
Accompanying drawing explanation
Accompanying drawing is the control circuit figure of a kind of agricultural greenhouse geothermal heating system of the present invention.
nullIn figure: R1. is close to road resistance a，R2. road resistance b it is close to，R3. resistance is driven，C1. filter capacitor a，C2. filter capacitor b，VD. bridge rectifier，V1. clamp diode，V2. audion，V+. DC supply，IC1. integrated package of pressure-stabilizing，IC2. NAND gate a，IC3. NAND gate b，IC4. NAND gate c，IC5. NAND gate d，TC. rectifier transformer，K. the coil of relay，K1. the contact switch of relay，TK. electric contact thermometer，FU1. fuse，FU2. fuse，KM. the coil of catalyst，KM-K. the main contacts switch of catalyst，FR. thermorelay，FR-K. the switch of thermorelay，M. threephase motor，N. the zero line of power supply，L1. phase line a of power supply，L2. phase line b of power supply，L3. phase line c of power supply，QS. automatic cut-off switch，U. wire a，V. wire b，W. wire c，1. the zero line input of power supply，2. the phase line input of power supply，3. lower limit temperature signal end，4. ceiling temperature signal end，5. feed end，6. control end a，7. control end b.
Detailed description of the invention
EmbodimentnullIn embodiment shown in the drawings，The control circuit of a kind of agricultural greenhouse geothermal heating system is by power circuit、Information-processing circuit and control output circuit composition，Wherein，Power circuit is by rectifier transformer (TC)、Bridge rectifier (VD)、Filter capacitor a(C1)、Integrated package of pressure-stabilizing (IC1) and filter capacitor b(C2) constitute，The primary coil of rectifier transformer (TC) is connected to the phase line input (2) of power supply and the zero line input (1) of power supply，The secondary coil of rectifier transformer (TC) is connected to two inputs of bridge rectifier (VD)，The positive pole of bridge rectifier (VD) is connected to filter capacitor a(C1) positive pole and the input of integrated package of pressure-stabilizing (IC1)，The outfan of integrated package of pressure-stabilizing (IC1) and filter capacitor b(C2) positive pole be connected after constitute DC supply (V+)，The negative pole of bridge rectifier (VD)、Filter capacitor a(C1) negative pole、Filter capacitor b(C2) negative pole and integrated package of pressure-stabilizing (IC1) earth terminal connect after constitute ground wire；nullInformation-processing circuit includes ceiling temperature signal end (4)、Lower limit temperature signal end (3)、Feed end (5)、NAND gate a(IC2)、NAND gate b(IC3)、NAND gate c(IC4) and NAND gate d(IC5)，Feed end (5) is connected to DC supply (V+)，Ceiling temperature signal end (4) is connected to NAND gate b(IC3) two inputs，In NAND gate b(IC3) two road of You Bang between input and ground wire resistance b(R2)，NAND gate b(IC3) outfan be connected to NAND gate c(IC4) first input end，NAND gate c(IC4) outfan be connected to NAND gate d(IC5) the second input，Lower limit temperature signal end (3) is connected to NAND gate a(IC2) two inputs，In NAND gate a(IC2) two road of You Bang between input and ground wire resistance a(R1)，NAND gate a(IC2) outfan be connected to NAND gate d(IC5) first input end，NAND gate d(IC5) outfan be connected to NAND gate c(IC4) the second input；nullControl output circuit to include driving resistance (R3)、Audion (V2)、Clamp diode (V1) and relay，Relay includes coil (K) and contact switch (K1)，Drive resistance (R3) the first foot be connected to NAND gate d(IC5) outfan，The crus secunda driving resistance (R3) is connected to the base stage of audion (V2)，The emitter stage of audion (V2) is connected to ground wire，The colelctor electrode of audion (V2) is connected to anode and second end of relay coil (K) of clamp diode (V1)，The negative electrode of clamp diode (V1) and the first end of relay coil (K) are connected to DC supply (V+)，Contact switch (K1) first end of relay is connected to control end a(6)，Contact switch (K1) second end of relay is connected to control end b(7).In the present embodiment, NAND gate a(IC2), NAND gate b(IC3), NAND gate c(IC4) and NAND gate d(IC5) share a NAND gate integrated circuit with four group of two input, the cmos digital integrated circuit selecting model to be CC4011, the power end of digital integrated electronic circuit is connected to DC supply (V+), and the earth terminal of digital integrated electronic circuit is connected to ground wire；nullThe outer of control circuit is with electric contact thermometer (TK)、Catalyst、Thermorelay (FR)、Three-phase and four-line supply line and water circulating pump，The indicator electrode of electric contact thermometer (TK) is connected to feed end (5)，The lower limit electrode of electric contact thermometer (TK) is connected to lower limit temperature signal end (3)，The upper limit electrode of electric contact thermometer (TK) is connected to ceiling temperature signal end (4)，Catalyst includes coil (KM) and three groups of main contacts switches，Three-phase and four-line supply line includes wire a(U)、Wire b(V)、Wire c(W) and zero line (N)，The zero line input (1) of control circuit is connected on the zero line (N) of supply line，The phase line input (2) of control circuit is connected to wire a(U) on，Coil (KM) first end of catalyst is connected to wire b(V) on，Coil (KM) second end of catalyst is connected to the control end a(6 of control circuit) on，The control end b(7 of control circuit) it is connected to switch second end of thermorelay (FR)，Switch first end of thermorelay (FR) is connected to wire c(W) on；The upper end of three groups of main contacts switch of catalyst is connected respectively to wire a(U), wire b(V) and wire c(W) on, the lower end of three groups of main contacts switches of catalyst is passed through thermorelay (FR) and is connected on the motor winding of water circulating pump.
During the present embodiment application, wire a(U), wire b(V) and wire c(W) be connected to phase line a(L1 of power supply by QS. automatic cut-off switch), phase line b(L2 of power supply) and phase line c(L3 of power supply) on, the temperature-sensitive bag of electric contact thermometer (TK) is arranged in agricultural greenhouse, the lower limit temperature of electric contact thermometer (TK) is arranged between 12 °-15 °, the ceiling temperature of electric contact thermometer (TK) is arranged between 18 °-20 °.nullDuring work，Close automatic cut-off switch (QS)，Control circuit is devoted oneself to work，When dropping to the lower limit temperature set at temperature in agricultural greenhouse，The indicator of electric contact thermometer (TK) touches lower limit electrode，High level enters into NAND gate a(IC2) two inputs，Make NAND gate a(IC2) outfan and NAND gate d(IC5) first input end be low level，NAND gate d(IC5) outfan be high level，Audion (V2) turns on，Coil (K) energising of relay，Contact switch (K1) Guan Bi of relay，The coil (KM) making catalyst is energized，Main contacts switch (KM-K) adhesive of catalyst，Threephase motor (M) energising of water circulating pump，Water circulating pump runs，Agricultural greenhouse is heated by pumping underground hot water in a looping fashion by radiator；At this moment, NAND gate b(IC3) two inputs be low level, NAND gate b(IC3) outfan and NAND gate c(IC4) first input end be high level, NAND gate d(IC5) high level of outfan feeds back to NAND gate c(IC4) the second input, when NAND gate c(IC4) two inputs when being all high level, NAND gate c(IC4) outfan and NAND gate d(IC5) the second input be low level；When the indicator of electric contact thermometer (TK) is lifted off lower limit electrode, NAND gate a(IC2) two inputs revert to low level, NAND gate a(IC2) outfan and NAND gate d(IC5) first input end be reversed to high level, at this moment, due to NAND gate d(IC5) the second input be low level, therefore, NAND gate d(IC5) outfan still keep high level, maintain water circulating pump to run；nullWhen the room temperature in agricultural greenhouse rises to the ceiling temperature set，The indicator of electric contact thermometer (TK) touches upper limit electrode，NAND gate b(IC3) two inputs be high level，NAND gate b(IC3) outfan and NAND gate c(IC4) first input end be reversed to low level，Make NAND gate c(IC4) outfan and NAND gate d(IC5) the second input be reversed to high level，At this moment，NAND gate d(IC5) two inputs be all high level，Make NAND gate d(IC5) outfan be reversed to low level，Audion (V2) ends，Coil (K) power-off of relay，Contact switch (K1) release of relay disconnects，Make coil (KM) power-off of catalyst，Main contacts switch (KM-K) release of catalyst disconnects，Threephase motor (M) power-off of water circulating pump，Water circulating pump stops.
Claims (5)
- null1. the control circuit of an agricultural greenhouse geothermal heating system，By power circuit、Information-processing circuit and control output circuit composition，The structure of power circuit is: the primary coil of rectifier transformer (TC) is connected to the phase line input (2) of power supply and the zero line input (1) of power supply，The secondary coil of rectifier transformer (TC) is connected to two inputs of bridge rectifier (VD)，The positive pole of bridge rectifier (VD) is connected to filter capacitor a(C1) positive pole and the input of integrated package of pressure-stabilizing (IC1)，The outfan of integrated package of pressure-stabilizing (IC1) and filter capacitor b(C2) positive pole be connected after constitute DC supply (V+)，The negative pole of bridge rectifier (VD)、Filter capacitor a(C1) negative pole、Filter capacitor b(C2) negative pole and integrated package of pressure-stabilizing (IC1) earth terminal connect after constitute ground wire；It is characterized in that the outer of control circuit is with electric contact thermometer (TK), the indicator electrode of electric contact thermometer (TK) is connected to feed end (5), the lower limit electrode of electric contact thermometer (TK) is connected to lower limit temperature signal end (3), and the upper limit electrode of electric contact thermometer (TK) is connected to ceiling temperature signal end (4)；The structure of information-processing circuit is: feed end (5) is connected to DC supply (V+), ceiling temperature signal end (4) is connected to NAND gate b(IC3) two inputs, NAND gate b(IC3) outfan be connected to NAND gate c(IC4) first input end, NAND gate c(IC4) outfan be connected to NAND gate d(IC5) the second input, lower limit temperature signal end (3) is connected to NAND gate a(IC2) two inputs, NAND gate a(IC2) outfan be connected to NAND gate d(IC5) first input end, NAND gate d(IC5) outfan be connected to NAND gate c(IC4) the second input；Control output circuit structure be: drive resistance (R3) the first foot be connected to NAND gate d(IC5) outfan, the crus secunda driving resistance (R3) is connected to the base stage of audion (V2), the emitter stage of audion (V2) is connected to ground wire, the colelctor electrode of audion (V2) is connected to anode and second end of relay coil (K) of clamp diode (V1), the negative electrode of clamp diode (V1) and the first end of relay coil (K) are connected to DC supply (V+), contact switch (K1) first end of relay is connected to control end a(6), contact switch (K1) second end of relay is connected to control end b(7).
- The control circuit of a kind of agricultural greenhouse geothermal heating system the most according to claim 1, is characterized in that in NAND gate a(IC2) two road of You Bang between input and ground wire resistance a(R1).
- The control circuit of a kind of agricultural greenhouse geothermal heating system the most according to claim 1, is characterized in that in NAND gate b(IC3) two road of You Bang between input and ground wire resistance b(R2).
- The control circuit of a kind of agricultural greenhouse geothermal heating system the most according to claim 1, it is characterized in that NAND gate a(IC2), NAND gate b(IC3), NAND gate c(IC4) and NAND gate d(IC5) share a NAND gate integrated circuit with four group of two input, the power end of integrated circuit is connected to DC supply (V+), and the earth terminal of integrated circuit is connected to ground wire.
- nullThe control circuit of a kind of agricultural greenhouse geothermal heating system the most according to claim 1，It is characterized in that the outer of control circuit is with catalyst、Thermorelay (FR)、Three-phase and four-line supply line and water circulating pump，Catalyst includes coil (KM) and three groups of main contacts switches，Three-phase and four-line supply line includes wire a(U)、Wire b(V)、Wire c(W) and zero line (N)，The zero line input (1) of control circuit is connected on the zero line (N) of supply line，The phase line input (2) of control circuit is connected to wire a(U) on，Coil (KM) first end of catalyst is connected to wire b(V) on，Coil (KM) second end of catalyst is connected to the control end a(6 of control circuit) on，The control end b(7 of control circuit) it is connected to switch second end of thermorelay (FR)，Switch first end of thermorelay (FR) is connected to wire c(W) on；The upper end of three groups of main contacts switch of catalyst is connected respectively to wire a(U), wire b(V) and wire c(W) on, the lower end of three groups of main contacts switches of catalyst is passed through thermorelay (FR) and is connected on the motor winding of water circulating pump.
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| CN2053846U (en) * | 1989-03-30 | 1990-03-07 | 包头市农业技术推广站 | Agricultural multifunctional electronic self-control monitor |
| JP5464431B2 (en) * | 2010-03-29 | 2014-04-09 | ユニバーサリー電工株式会社 | Agricultural house switchgear control system and agricultural house temperature control method using switchgear |
| CN201902315U (en) * | 2010-12-10 | 2011-07-20 | 宝钢集团新疆八一钢铁有限公司 | Electrical interlocking control device for low-temperature liquid pump |
| CN201965494U (en) * | 2011-03-17 | 2011-09-07 | 商丘市电业局永城分局 | Double-limit temperature controller of machine cabinet |
| CN103125317B (en) * | 2013-02-19 | 2014-04-16 | 衢州市煜鑫农产品加工技术开发有限公司 | Automatic ventilation controller of vegetable greenhouse |
| CN203311189U (en) * | 2013-06-30 | 2013-11-27 | 衢州昀睿工业设计有限公司 | Foundation pit automation drainage control module |
| CN204299846U (en) * | 2014-12-14 | 2015-04-29 | 衢州市煜鑫农产品加工技术开发有限公司 | A kind of control circuit of agricultural greenhouse geothermal heating system |
-
2014
- 2014-12-14 CN CN201410762502.8A patent/CN104481855B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN104481855A (en) | 2015-04-01 |
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