阅读说明：本技术 蔬菜（黄瓜）大棚温度自动控制器 (Automatic temp. controller for vegetable (cucumber) greenhouse ) 是由 雷建设 于 2018-06-09 设计创作，主要内容包括：本发明一种蔬菜(黄瓜)大棚温度自动控制器,包括一盒体,还包括温度传感器、光敏传感器、单向器、放大器、识别器、继电器、加热器插座、降温器插座；所述放大器包括放大器1顺序到放大器9,识别器包括识别器1到识别器4,继电器包括继电器1、继电器2、继电器3,所述温度传感器依次连接单向器1、放大器1、识别器1、放大器3、继电器1和降温器插座,温度传感器还依次连接单向器2、放大器2、识别器4、放大器7、放大器8、单向器4和继电器2；控制蔬菜大棚白天温度在25—30℃,晚上温度在15—20℃范围,非常利于黄瓜蔬菜的生长,本发明结构简单,制作成本低,控制精确的高,操作使用方便,减少人力资源,适应生产管理需要,有一定的推广价值。(The invention relates to an automatic temperature controller for a vegetable (cucumber) greenhouse, which comprises a box body, a temperature sensor, a photosensitive sensor, an isolator, an amplifier, an identifier, a relay, a heater socket and a cooler socket, wherein the temperature sensor is arranged on the box body; the amplifier comprises an amplifier 1 and an amplifier 9, the recognizer comprises a recognizer 1 and a recognizer 4, the relay comprises a relay 1, a relay 2 and a relay 3, the temperature sensor is sequentially connected with the isolator 1, the amplifier 1, the recognizer 1, the amplifier 3, the relay 1 and the cooler socket, and the temperature sensor is also sequentially connected with the isolator 2, the amplifier 2, the recognizer 4, the amplifier 7, the amplifier 8, the isolator 4 and the relay 2; the vegetable greenhouse has the advantages of simple structure, low manufacturing cost, high control accuracy, convenience in operation and use, reduction of manpower resources, adaptation to production management requirements and certain popularization value.)

1. An automatic temperature controller for a vegetable (cucumber) greenhouse comprises a box body, a temperature sensor, a photosensitive sensor, an isolator, an amplifier, an identifier, a relay, a heater socket, a cooler socket, an air switch and a working power supply, wherein the box body is provided with the temperature sensor, the photosensitive sensor, the isolator, the amplifier, the identifier, the relay, the heater socket, the cooler socket, the air switch and the working power supply; the isolator comprises an isolator 1, an isolator 2, an isolator 3 and an isolator 4, the amplifier comprises an amplifier 1, an amplifier 2, an amplifier 3, an amplifier 4, an amplifier 5, an amplifier 6, an amplifier 7, an amplifier 8 and an amplifier 9, the recognizer comprises a recognizer 1, a recognizer 2, a recognizer 3 and a recognizer 4, the relay comprises a relay 1, a relay 2 and a relay 3, the temperature sensor is sequentially connected with the isolator 1, the amplifier 1, the recognizer 1, the amplifier 3, the relay 1 and a cooler socket, and the amplifier 1 is further sequentially connected with the recognizer 2, the amplifier 4, the amplifier 5, the relay 2 and the heater socket; the temperature sensor is also sequentially connected with the isolator 2, the amplifier 2, the identifier 4, the amplifier 7, the amplifier 8, the isolator 4 and the relay 2; the amplifier 2 is further connected with the recognizer 3, the amplifier 9, the isolator 4 and the relay 1, the photosensitive sensor is sequentially connected with the amplifier 6, the relay 3 and the amplifier 1, and the relay 3 is further connected with the amplifier 2.

2. The automatic vegetable (cucumber) greenhouse temperature controller as claimed in claim 1, wherein the working power supply comprises a transformer, a rectifier, a filter, a voltage stabilizer and an indicator, the transformer is connected with the rectifier, the filter, the voltage stabilizer and the indicator in sequence, and the voltage stabilizer is further connected with the amplifier 6.

3. The automatic temperature controller for vegetable (cucumber) greenhouses as claimed in claim 1, wherein the temperature sensor is MF 58-503-.

4. The automatic temperature controller for the vegetable (cucumber) greenhouse as claimed in claim 1, wherein the isolator 1 and the isolator 2 are 1N4147 switching diodes respectively, the isolator 3 and the isolator 4 are 1N4001 diodes respectively, the amplifier 1 and the amplifier 2 are compounded by two C9012 triodes respectively, the amplifier 3, the amplifier 5, the amplifier 6, the amplifier 8 and the amplifier 9 are compounded by C9014 and C9013 triodes respectively, the amplifier 4 and the amplifier 7 are C9014 triodes, the identifier 1 is a 9.7V zener diode, the identifier 2 is a 7.8V zener diode, the identifier 3 is a 5.7V zener diode, and the identifier 4 is a 3.6V zener diode.

5. The automatic controller for greenhouse temperature of vegetable (cucumber) as claimed in claim 1, wherein the relay 1 and the relay 2 are JQX-13F, respectively, the relay 3 is HK19F-DC12V-SHG, the air switch is NBE7 miniature circuit breaker, and the temperature sink socket and the heater socket are 20A/220V power sockets, respectively.

6. The automatic controller for vegetable (cucumber) greenhouse temperature as claimed in claim 1 or claim 2, characterized in that the working power supply transformer is a 3W output voltage of 15V, the rectifier is a 1N4002 diode, the filter is a 1000 μ F/25V electrolytic capacitor, the voltage stabilizer is a 7812 three-terminal voltage stabilizer, and the indicator is a red LED light emitting diode.

The invention relates to the technical field of electronic automatic controllers, in particular to an automatic controller for the temperature of a vegetable (cucumber) greenhouse.

Background

At present, the greenhouse has great advantages in vegetable planting; in the vegetable market, various vegetables in different seasons are often seen, and most of the vegetables come from a greenhouse; the cucumber is one of the vegetables which people like to eat, and is favorable for the growth of the cucumber only when the temperature of the cucumber is between 25 and 30 ℃ in the daytime and between 15 and 20 ℃ at night (the day and night temperature difference is about 10 ℃ at best); however, the change of the whole year, especially in the northern area, the temperature is too low in winter, the cucumber can be frozen or stops growing, the temperature of the greenhouse is controlled to be 25-30 ℃ in the daytime and 15-20 ℃ at night, and the manual control is only needed, so that the manpower resource is consumed, and errors are easy to occur; therefore, the automatic vegetable (cucumber) greenhouse temperature controller which is simple to manufacture and low in cost is invented to control the temperature of the cucumber greenhouse and meet the production management requirements.

Disclosure of Invention

The invention discloses a vegetable (cucumber) greenhouse temperature automatic controller which is easy to manufacture, simple to use and low in cost, and is used for controlling the greenhouse temperature of cucumbers and adapting to production management requirements.

The invention relates to an automatic controller in the electronic field, in particular to an automatic controller for the temperature of a vegetable (cucumber) greenhouse; comprises a box body, a temperature sensor and a photosensitive sensor

The device comprises a sensor, an isolator, an amplifier, an identifier, a relay, a heater socket, a cooler socket, an air switch and a working power supply; the isolator comprises an isolator 1, an isolator 2, an isolator 3 and an isolator 4, the amplifier comprises an amplifier 1, an amplifier 2, an amplifier 3, an amplifier 4, an amplifier 5, an amplifier 6, an amplifier 7, an amplifier 8 and an amplifier 9, the recognizer comprises a recognizer 1, a recognizer 2, a recognizer 3 and a recognizer 4, the relay comprises a relay 1, a relay 2 and a relay 3, the temperature sensor is sequentially connected with the isolator 1, the amplifier 1, the recognizer 1, the amplifier 3, the relay 1 and a cooler socket, and the amplifier 1 is further sequentially connected with the recognizer 2, the amplifier 4, the amplifier 5, the relay 2 and the heater socket; the temperature sensor is also sequentially connected with the isolator 2, the amplifier 2, the identifier 4, the amplifier 7, the amplifier 8, the isolator 4 and the relay 2; the amplifier 2 is further connected with the recognizer 3, the amplifier 9, the isolator 4 and the relay 1, the photosensitive sensor is sequentially connected with the amplifier 6, the relay 3 and the amplifier 1, and the relay 3 is further connected with the amplifier 2.

Preferably, the automatic controller for the temperature of the vegetable (cucumber) greenhouse comprises a working power supply, wherein the working power supply comprises a transformer, a rectifier, a filter, a voltage stabilizer and an indicator, the transformer is sequentially connected with the rectifier, the filter, the voltage stabilizer and the indicator, and the voltage stabilizer is further connected with an amplifier 6, so that the temperature of the greenhouse vegetable cucumber is 25-30 ℃ in daytime and 15-20 ℃ at night, and the automatic controller is very favorable for the growth of the cucumber vegetable.

Preferably, the automatic temperature controller for the vegetable (cucumber) greenhouse comprises a temperature sensor which is MF 58-503-.

Preferably, the automatic temperature controller for the vegetable (cucumber) greenhouse comprises an isolator 1 and an isolator 2 which are respectively 1N4147 switching diodes, an isolator 3 and an isolator 4 which are respectively 1N4001 diodes, an amplifier 1 and an amplifier 2 which are respectively compounded by two C9012 triodes, an amplifier 3, an amplifier 5, an amplifier 6, an amplifier 8 and an amplifier 9 which are respectively compounded by C9014 and C9013 triodes, an amplifier 4 and an amplifier 7 which are C9014 triodes, an identifier 1 which is a 9.7V voltage stabilizing diode, an identifier 2 which is a 7.8V voltage stabilizing diode, an identifier 3 which is a 5.7V voltage stabilizing diode and an identifier 4 which is a 3.6V voltage stabilizing diode.

Preferably, the automatic controller for the temperature of the vegetable (cucumber) greenhouse comprises a relay 1, a relay 2, a relay 3, an air switch NBE7 miniature circuit breaker, a temperature reducer socket and a heater socket, wherein the relay 1 and the relay 2 are respectively JQX-13F, the relay 3 is HK19F-DC12V-SHG, and the temperature reducer socket and the heater socket are respectively 20A/220V power sockets.

More preferably, in the automatic controller for the temperature of the vegetable (cucumber) greenhouse, the working power supply transformer is a 3W output voltage of 15V, the rectifier is a 1N4002 diode, the filter is a 1000 muF/25V electrolytic capacitor, the voltage stabilizer is a 7812 three-terminal voltage stabilizer, and the indicator is a red LED.

The invention uses electronic elements to form a controller to control the temperature of the vegetables in the cucumber greenhouse to be 25-30 ℃ in daytime and 15-20 ℃ at night, is very beneficial to the growth of the cucumbers and the vegetables, has simple structure, low manufacturing cost and stable working performance, reduces human resources, effectively controls the temperature of the vegetable (cucumber) greenhouse, and meets the requirements of production management.

Drawings

Fig. 1 is a schematic view of the connection structure of the electronic components of an automatic temperature controller for a vegetable (cucumber) greenhouse.

Fig. 2 is a schematic diagram of the working power supply wiring of the automatic vegetable (cucumber) greenhouse temperature controller.

Detailed Description

As shown in fig. 1, the automatic temperature controller for the vegetable (cucumber) greenhouse disclosed by the invention comprises a box body, a temperature sensor, a photosensitive sensor, an isolator, an amplifier, an identifier, a relay, a heater socket, a cooler socket, an air switch and a working power supply, wherein the box body is provided with the temperature sensor, the photosensitive sensor, the isolator, the amplifier, the identifier, the relay, the heater socket, the cooler socket, the air switch and the; the isolator comprises an isolator 1, an isolator 2, an isolator 3 and an isolator 4, the amplifier comprises an amplifier 1, an amplifier 2, an amplifier 3, an amplifier 4, an amplifier 5, an amplifier 6, an amplifier 7, an amplifier 8 and an amplifier 9, the recognizer comprises a recognizer 1, a recognizer 2, a recognizer 3 and a recognizer 4, the relay comprises a relay 1, a relay 2 and a relay 3, the temperature sensor is sequentially connected with the isolator 1, the amplifier 1, the recognizer 1, the amplifier 3, the relay 1 and a cooler socket, and the amplifier 1 is further sequentially connected with the recognizer 2, the amplifier 4, the amplifier 5, the relay 2 and the heater socket; the temperature sensor is also sequentially connected with the isolator 2, the amplifier 2, the identifier 4, the amplifier 7, the amplifier 8, the isolator 4 and the relay 2; amplifier 2 still with recognizer 3, amplifier 9, isolator 4 and relay 1, photosensitive sensor connects gradually amplifier 6, relay 3, amplifier 1, and amplifier 2 is still connected to relay 3, working power supply includes transformer, rectifier, wave filter, stabiliser and indicator, and the transformer connects gradually rectifier, wave filter, stabiliser and indicator, and the stabiliser is still connected amplifier 6, forms greenhouse vegetable cucumber temperature 25-30 ℃ on daytime, 15-20 ℃ temperature at night, does benefit to cucumber vegetable's growth very much.

An automatic controller for the temperature of a vegetable (cucumber) greenhouse is selected, a temperature sensor is selected from MF58-503 and 3950 glass NTC thermistors, the photoresistor is selected from a photoresistor, a one-way device 1 and a one-way device 2 are respectively selected from 1N4147 switching diodes, the one-way device 3 and the one-way device 4 are respectively selected from 1N4001 diodes, an amplifier 1 and an amplifier 2 are respectively compounded by two C9012 triodes, the amplifier 3, an amplifier 5, an amplifier 6, an amplifier 8 and an amplifier 9 are respectively compounded by a C9014 triode and a C9013 triode, the amplifier 4 and the amplifier 7 are C9014 triodes, an identifier 1 is a 9.7V voltage stabilizing diode, an identifier 2 is a 7.8V voltage stabilizing diode, the identifier 3 is a 5.7V voltage stabilizing diode, the identifier 4 is a 3.6V voltage stabilizing diode, the relay 1, the relay 2, the relay 4 and the relay 5 are respectively selected from JQX-13F, and the relay 3 is selected from HK19, the temperature reducer socket and the heater socket are respectively selected from a 20A/220V power socket, the air switch is selected from an NBE7 miniature circuit breaker, the working power transformer is selected from 3W output voltage 15V, the rectifier is selected from a 1N4002 diode, the filter is selected from a 1000 muF/25V electrolytic capacitor, the voltage stabilizer is selected from a 7812 three-terminal voltage stabilizer, and the indicator is selected from a red LED light-emitting diode.

The utility model provides a vegetables (cucumber) big-arch shelter temperature automatic control manufacture process, design the circuit diagram, with the pen circuit drawing on the hole circuit board, with the 30W electric iron to the selected component welding on the hole circuit board circuit diagram of design, connecting wire adopts stranded thin copper wire, temperature sensor and photosensitive sensor are fixed in a side of box body respectively, air switch, the cooler socket, heater socket and power indicator set up respectively on the panel of box body, power transformer fixes alone on the box body on the floor, the hole circuit board of welding electronic component sets up inside the box body.

A vegetable (cucumber) greenhouse temperature automatic controller working principle and element parameters are provided, a temperature sensor is a negative temperature coefficient series product selected from MF58-503 glass NTC thermistor with good consistency, high precision, good stability, sensitive response, high temperature resistance and long service life, MF58 is a 50000 omega (50K omega) thermistor resistance value, 3950 is a beta value of the thermistor, when the 50K omega thermistor is subjected to the change of the environmental temperature of a cucumber vegetable greenhouse, the resistance value is small when the temperature is high, and the resistance value is large when the temperature is low.

In the daytime, the temperature of the cucumber vegetable greenhouse is slowly increased under the illumination of the sun, the resistance value of a 50K omega thermistor of the temperature sensor is slowly reduced, the thermistor is connected with the base of the amplifier 1 through the negative bias of the isolator 1 (the isolator is selected to ensure that the amplifier 1 and the amplifier 2 do not work and are not influenced), the negative voltage of the base of the amplifier 1 is slowly increased, the amplifier 1 is formed by compounding two C9012 triodes, the amplification factor is high, the collector of the amplifier 1 is connected with the load resistor to the negative electrode, the positive voltage output by the collector of the amplifier 1 is increased, the voltage output by the collector of the amplifier 1 is detected by the resistance value of the thermistor at 30 ℃ through the identifier 1, the amplifier 2 and the relay 1 can be started to work, the cooler is controlled to work, and the specific parameters of the components are that when the temperature of the vegetable greenhouse is increased by 30 ℃, the selected (MF 58-503 minus phase 3950 glass NTC thermistor) 50K omega thermistor is reduced to 36 503-glass NTC thermistor with resistance value of 40.28K omega at 30 ℃ in environment, which is also the value of the product in practical application), wherein the resistance value of 40.28K omega enables the voltage of the base electrode 1 of the amplifier to be 1.18V, the voltage of the collector electrode of the amplifier 1 to be 10.88V, the voltage recognizer 1 adopts a 9.7V voltage stabilizing diode through the voltage recognizer 1, the recognizer 1 is conducted when the recognizer 1 is higher than 9.7V, the voltage is obtained by connecting the recognizer 1 to the base electrode of the amplifier 3, the voltage of the base electrode of the amplifier 3 is saturated and conducted, the voltage of the base electrode of the amplifier 3 needs 1.16V, the amplifier 3 adopts C9014 and C9013 triode composite, the amplifier 3 is saturated and conducted, the collector electrode is connected with the coil of the relay 1 to obtain the negative electrode of 0V working voltage, the relay 1 works, the relay 1 adopts JRX-13F, the output end is two groups of contacts, namely two open and two closed contacts, the, as shown in fig. 2, the two long starting contacts are connected with a cooler socket, and when a cooler power cord is inserted into the socket, the cooler works to cool the temperature of the vegetable greenhouse, so that the temperature of the cucumber vegetable greenhouse is not higher than 30 ℃ in daytime.

In the daytime, if no sunlight is irradiated or a special environment is met, the temperature of the vegetable greenhouse is slowly reduced, the resistance value of the thermistor is slowly increased, the voltage of the base electrode of the amplifier 1 is slowly reduced, when the vegetable greenhouse is at 25 ℃, the resistance value of the selected (MF 58-503 and 3950 glass NTC thermistor) 50K omega thermistor is increased from 40.28K omega at 30 ℃ to 50K omega at 25 ℃, the voltage of the base electrode of the amplifier 1 is 1.15, the output voltage of the collector electrode of the amplifier 1 is 7.8V, the identifier 2 is conducted, the voltage identifier 2 is connected with a 7.2V voltage stabilizing diode (the identifier 2 is conducted when being higher than 7.2V), the base electrode connected with the amplifier 4 obtains 0.7V voltage, the amplifier 4 is connected with a C9014 and NPN type, the amplifier 4 is conducted in a saturated mode, the collector electrode of the amplifier 4 is connected with a load resistor, the output voltage of the collector electrode is 0V, the base electrode of the connected, the amplifier 5 is compounded by a C9014 triode and a C9013 triode, the amplifier 5 is cut off, the relay 2 does not work, and the heater does not work; when the temperature of the vegetable greenhouse is lower than 25 ℃, at 24 ℃, the voltage of the base electrode of the amplifier 1 is lower than 1.13V, the output voltage of the collector electrode of the amplifier 1 is 7.4V, the recognizer 2 is conducted, the voltage recognizer 2 selects a 7.2V voltage regulator diode, the recognizer 2 is conducted when the voltage is higher than 7.2V, the base electrode of the amplifier 4 is connected to obtain 0.2V voltage, the amplifier 4 selects a C9014 triode and an NPN type triode, the amplifier 4 is cut off, the collector electrode of the amplifier 4 is connected with a load resistor to the positive electrode, the output voltage of the collector electrode is 8.6V voltage, the base electrode of the connected collector electrode 5 obtains 1.2V voltage, the amplifier 5 selects a C9014 triode and a C9013 triode to be compounded, the amplifier 5 is in saturated conduction, the relay 2 works, the collector electrode is connected with a coil of the relay 2 to obtain the negative electrode, namely 0V working voltage, the relay 2 works, the two long open stationary contacts are connected with an air switch which is connected with 220V alternating current, as shown in figure 2, the two long open stationary contacts are connected with a heater socket, when a heater power cord is plugged into the socket, the heater works to heat the vegetable greenhouse, so that the temperature of the cucumber vegetable greenhouse is not lower than 25 ℃ in the daytime.

The cucumber vegetable greenhouse is illuminated by the sun more than ten hours at daytime at night, the temperature is higher, the resistance value of the 50K omega thermistor of the temperature sensor is smaller, the thermistor is connected with the base electrode of the amplifier 2 through the negative bias of the isolator 2, the negative voltage of the base electrode of the amplifier 2 is higher, and the amplifier 2 selects

The two C9012 triodes are combined, the amplification factor is high, and the collector of the amplifier 2 is connected with the negative electrode

The load resistor is connected, so that the forward voltage output by the collector of the amplifier 2 is increased, the identifier 4 detects that the resistance value of the thermistor enables the voltage output by the collector of the amplifier 2 at 20 ℃, the amplifier 9 enables the relay 1 to work through the isolator 3 and controls the cooler to work, the specific parameters of the components are that when the temperature of the vegetable greenhouse is not less than 20 ℃, the resistance value of the selected (MF 58-503 and 3950 glass NTC thermistor) 50K omega is not less than 62.43K omega (MF 58-503 and 3950 glass NTC thermistor is displayed according to the data technical parameters, the resistance value at the environment of 20 ℃ is 62.43K omega, the practical application of the product is also the value), the resistance value of 62.43K omega can enable the voltage of the base 2 of the amplifier to be 1.13V, the voltage of the collector 2 of the amplifier is 6.86V, and the voltage identifier 3 selects a 5.7V voltage stabilizing diode, the recognizer 3 is conducted, (the recognizer 3 is conducted when the voltage is higher than 5.7V) is connected to the base of the amplifier 9 to obtain 1.16 voltage, (the amplifier 9 is in saturated conduction and needs 1.16V voltage for the base), the amplifier 9 is compounded by C9014 and C9013 triodes, the amplifier 9 is in saturated conduction, the collector of the amplifier 9 is connected with the coil of the relay 1 through the isolator 3 to obtain the negative electrode, namely 0V working voltage (the technology of setting the isolator 3 is that the amplifier 9 does not damage the amplifier 3 when working), the relay 1 works, the relay 1 selects JRX-13F, the output end is two groups of contacts, namely two open and two close contacts, two long open static contacts are connected with an air switch which is connected with 220V alternating current, as shown in figure 2, two long open contacts are connected with a cooler socket, when the power line of the cooler is plugged into the socket, the cooler works to cool the temperature of the vegetable greenhouse, so that the temperature of the cucumber vegetable greenhouse is not higher than 20 ℃ at night.

In the late night, the temperature of the cucumber vegetable greenhouse slowly decreases, the resistance value of the thermistor slowly increases, the negative voltage of the base electrode of the amplifier 2 slowly decreases, when the temperature of the vegetable greenhouse is equal to 15 ℃, the resistance value of the selected (MF 58-503 and 3950 glass NTC thermistor) 50K omega thermistor is increased from 62.43K omega at 20 ℃ to 78.46K omega at 15 ℃, the voltage of the base electrode of the amplifier 2 is 1.12 at 15 ℃, the output voltage of the collector electrode of the amplifier 2 is 4.28V, the identifier 4 is conducted, the voltage identifier 4 is selected from a 3.6V voltage stabilizing diode, the identifier 4 is conducted when being higher than 3.6V, the base electrode of the amplifier 7 is connected to obtain 0.68V voltage, the amplifier 7 is selected from a C9014 triode, an NPN type, the amplifier 7 is in saturated conduction, the collector electrode of the amplifier 7 is connected to a load resistor, the collector electrode of the amplifier 7 is connected to obtain 0V voltage, the base electrode of, the amplifier 8 is compounded by a C9014 triode and a C9013 triode, the amplifier 8 is cut off, the relay 2 does not work, and the heater does not work; when the temperature of the vegetable greenhouse is lower than 15 ℃, at 14 ℃, the voltage of the base of the amplifier 2 is lower than 1.12V, the output voltage of the collector of the amplifier 2 is 3.92V, the identifier 4 is conducted, the voltage identifier 4 selects a 3.6V voltage regulator diode, the identifier 4 is conducted when the voltage is higher than 3.6V, the base connected to the amplifier 7 obtains 0.32V (lower than 0.6V conducting voltage), the amplifier 7 selects a C9014 triode and an NPN type, the amplifier 7 is cut off, the collector of the amplifier 7 is connected with a load resistor to the positive electrode, the output voltage of the collector is 8V at the moment, the base of the connected amplifier 8 obtains 1.2V, the amplifier 8 selects a C9014 and C9013 triode compound, the amplifier 8 is in saturated conduction (the base is not higher than 1.2V), the amplifier 8 is connected with the coil of the relay 2 through the isolator 4 (the technology of the isolator 4 is set, the amplifier 8 does not damage) to obtain the negative electrode voltage, namely 0V, the relay 2 works, the relay 2 selects JRX-13F, the output end is two groups of contacts, namely two open contacts and two closed contacts, two long open static contacts are connected with an air switch, the air switch is connected with 220V alternating current, as shown in figure 2, the two long open contacts are connected with a heater socket, when a power cord of the heater is inserted into the socket, the heater works to increase the temperature of the vegetable greenhouse, and thus the temperature of the cucumber vegetable greenhouse is not lower than 15 ℃ at night; therefore, the temperature of the cucumber vegetable greenhouse is controlled to be between 15 and 20 ℃ at night, and the growth of cucumber vegetables is facilitated.

In implementation, the output ends of the collectors of the amplifier 3 and the amplifier 9 composite triodes are connected in parallel and then connected to one end of the coil of the relay 1, which can be called as a negative end, because the other end of the coil of the relay 1 is connected with the positive electrode of a power supply, the output end of the amplifier 9 is connected with the isolator 3, which is connected in a negative electrode manner, and the output work of the amplifier 9 is not influenced; also an amplifier 5

The output end of the collector of the compound triode and the amplifier 8 is connected in parallel and then connected with one end of the coil of the relay 2, which can also be called as a negative end, and the following principle is connected with the relay 1 and is not described.

Working control in daytime and at night, and identifying the daytime and the night by using a photosensitive sensor designed in a circuit; the photosensitive sensor adopts a photosensitive resistor, the resistance value of the photosensitive resistor is reduced when the photosensitive resistor is illuminated, and the resistance value of the photosensitive resistor is increased when the photosensitive resistor is not illuminated; the positive bias of the photoresistor is connected with the base of the amplifier 6, the amplifier 6 is compounded by C9014 and C9013 triodes, the amplification capacity is greatly improved, the illumination resistance value is reduced in the daytime, the base voltage of the amplifier 6 is increased, the collector of the amplifier 6 is connected with the relay 3 to the positive electrode, the collector output of the amplifier 6 is reduced, when the base voltage output voltage of the amplifier 6 is increased by 1.19V (the illumination is more than or equal to 1 lx), the amplifier 6 is in saturated conduction, the collector output voltage is 0V, the negative working voltage is connected with the connected relay 3, so that the connected relay 3 works, the relay 3 adopts HK19F-DC12V-SHG, the output end is provided with two groups of contacts, namely two open and two closed contacts, and the output group of normally open ends is closed to; at night, the resistance value of the photodiode is increased without light irradiation, the base voltage of the amplifier 6 is reduced by 1.17 (the illuminance is less than or equal to 1 lx), the amplifier 6 is cut off (is not conducted), the coil of the relay 3 cannot obtain the negative working voltage of 0V, the two groups of normally open ends of the relay 3 are separated, the two groups of normally closed ends are closed, and the power is supplied to a circuit connected with the amplifier 2, so that the relay 1 and the relay 2 work in the daytime to control the temperature of the vegetable greenhouse to be within the range of 25-30 ℃, and at night, the relay 4 and the relay 5 work to control the temperature of the vegetable greenhouse to be within the range of 15-20 ℃.

According to the working principle of the power supply, 220V alternating current is reduced to 15V alternating current through a selected 3W output 15V transformer, a bridge rectifier is formed by four selected 1N4002 diodes to form 14.3V direct current containing alternating current components, then a 1000 muF/25V electrolytic capacitor filter is selected to form about 18V direct current containing no alternating current components, a 7812 three-terminal voltage stabilizer is selected to stabilize through the voltage stabilizer to form a stable 12V direct current working power supply, and the power supply is used for a designed circuit, a relay and an indicator.

During the use, fix cucumber vegetables big-arch shelter temperature automatic control device box body on a wall, or put on the desktop, insert the 220V alternating current to air switch's input, the power plug of controller inserts 220V supply socket, selects suitable position to install the cooler in the canopy, the heater, considers that the temperature is even in the canopy, can set up one or the dispersion and set up a plurality ofly, interconnecting link can work, the electric wire is overhead away at last (indoor humidity is electric shock easily), guarantees safety.

The invention controls the temperature of the cucumber vegetable greenhouse to be 25-30 ℃ in daytime and 15-20 ℃ at night through the electronic element, is very beneficial to the growth of cucumber vegetables, has simple structure, low manufacturing cost, high control accuracy and convenient operation and use, reduces human resources, effectively controls the temperature of the cucumber vegetable greenhouse, meets the production management requirements, and has certain popularization and use values.