CN201926939U

CN201926939U - Temperature control device for intelligent cell culture greenhouse

Info

Publication number: CN201926939U
Application number: CN2010205604857U
Authority: CN
Inventors: 齐名; 王亚然; 胡丽芝; 马东杰; 王英; 高珊; 耿风廷
Original assignee: NORTH-CHINA PHARMACEUTICAL JINTAN BIOTECHNOLOGY Co Ltd
Current assignee: NORTH-CHINA PHARMACEUTICAL JINTAN BIOTECHNOLOGY Co Ltd
Priority date: 2010-10-14
Filing date: 2010-10-14
Publication date: 2011-08-10
Anticipated expiration: 2020-10-14

Abstract

The utility model discloses a temperature control device for an intelligent cell culture greenhouse. The temperature control device is characterized in that: a programmable controller is connected with a steam heating proportion integration differentiation (PID) actuating element and an electric heater PID actuating element respectively in series; the serial port 1 of the programmable controller is connected with an electric heating intelligent PID temperature control meter and a steam heating intelligent PID temperature control meter through data wires; the signal receiving end of the programmable controller is connected with a greenhouse temperature sensor, an electric heating temperature sensor and a steam heat temperature sensor respectively; and a display screen is connected with the serial port 0 of the programmable controller through a data wire. By adopting the temperature control device, indoor temperature can be effectively kept constant, and an overshoot phenomenon caused by manual switching is effectively avoided.

Description

A kind of intelligent cellular incubation greenhouse temperature control device

Affiliated field

The utility model relates to temperature control equipment, and specifically a kind of pair cell that is applicable to is cultivated the greenhouse and carried out temperature controlled device.

Background technology

Cell culture technology has strict qualification to the temperature of culturing room, keep cultured cell vigorous growth, the temperature range that the temperature constant of culturing room must suited.The standard temperature of cultivating as human body cell is 36.5 ℃ ± 0.5 ℃, departs from this temperature range, and the eubolism of cell can be affected, even can be dead.For the temperature that guarantees cell culture chamber can be constant in suitable scope, cell culture chamber all is provided with heating system and indoor temperature control device usually.The heating system of cell culture chamber design at present generally all is furnished with two kinds of different thermals source of steam heat and electric heating simultaneously.Like this, when wherein a kind of thermal source can not use for some reason, can in time switch to another kind of thermal source work, thereby effectively prevent from normally to move because of the thermal source fault makes system.Present indoor temperature control device generally includes by display, programmable single chip computer and the controlled temperature-control circuit of being made up of heating control circuit and cooling control circuit thereof.When practical application, existing indoor temperature control device generally can only be regulated and control at a kind of thermal source, as or regulate and control at steam source specially or regulate and control at electric heat source.So it is, essential by switching manually when the thermal source that is using goes wrong need enable another kind of thermal source the time.This mode very easily causes system's concussion overshoot, thereby causes the greenhouse temperature overtemperature.In addition, present indoor temperature control device and the blower fan onrelevant in the cell culture chamber heating system, so it is indoor when fan trouble occurring the heat energy method to be delivered to, when causing indoor temperature to reduce, temperature sensor still can mechanically pass to well heater with temperature signal on the low side, therefore well heater can ceaselessly work on, so initiation fire very easily.

The utility model content

The purpose of this utility model is that a kind of intelligent cellular incubation greenhouse temperature control device will be provided, its design science rationally and can automatically switch to two kinds of thermals source according to determination data, thereby can overcome existing problem in the above-mentioned prior art.

The purpose of this utility model is achieved in that

Intelligent cellular incubation greenhouse temperature control device provided by the utility model, include Programmable Logic Controller, display screen, temperature sensor, its design main points are that Programmable Logic Controller is serially connected with Steam Heating PID executive component and electric heater PID executive component respectively; The PORT1 serial ports of Programmable Logic Controller links to each other with electric heating intelligent PID temp controlled meter, Steam Heating intelligent PID temp controlled meter by data line; The signal receiving end of Programmable Logic Controller links to each other with greenhouse temperature sensor, electric heating temperature sensor and steam heat temperature sensor respectively; Display screen is connected with the PORT0 serial ports of Programmable Logic Controller by data line.

The utility model temperature control degree of accuracy height, can detect automatically at two kinds of thermal source forms simultaneously, and can automatically switch to two kinds of thermals source according to determination data, thereby can effective constant indoor temperature, and effectively avoided the overshoot phenomenon that manual switching caused.Whether the utility model can also detect the operation of blower fan belt simultaneously automatically normal, solved thus because of fan trouble causes temperature sensor signal and misled the problem of the improper continuous firing of well heater.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

As shown in Figure 1, the utility model includes Programmable Logic Controller 1, display screen 2, temperature sensor.Programmable Logic Controller 1 is serially connected with Steam Heating PID executive component and electric heater PID executive component respectively; The serial ports PORT1 of Programmable Logic Controller 1 links to each other with electric heating intelligent PID temp controlled meter 3, Steam Heating intelligent PID temp controlled meter 4 by data line; The signal receiving end of Programmable Logic Controller 1 links to each other with greenhouse temperature sensor 14, electric heating temperature sensor 13 and steam heat temperature sensor 12 respectively; Display screen 2 is connected with the serial ports PORT0 of Programmable Logic Controller 1 by data line.

The signal input pickup 11 of the signal input pickup 10 of electric heating intelligent PID temp controlled meter 3 and Steam Heating intelligent PID temp controlled meter 4 is installed in the greenhouse inlet end of supply air duct 22.

Electric heating intelligent PID temp controlled meter (3) and Steam Heating intelligent PID temp controlled meter (4) preferably adopt the two PT100 compound sensors of four-wire system, to reduce the signal errors of electric heating intelligent PID temp controlled meter 3 and Steam Heating intelligent PID temp controlled meter 4 as far as possible.

Described Steam Heating PID executive component is made of electropneumatic transducer 5 (4-20mA is converted to 0-0.2Mpa), ratio barrier film variable valve 7, heat interchanger 19, steam trap 20.This executive component is subjected to the regulation and control of Steam Heating intelligent PID temp controlled meter 4.Be connected with electro connecting pressure gauge 9 at Programmable Logic Controller 1.Electro connecting pressure gauge 9 offers Programmable Logic Controller 1 with the steam disappearance of signal, provides foundation for thermal source automaticallyes switch.On electropneumatic transducer 5, be connected with steam electromagnetic valve 6 and pneumatic stopping valve 8.Steam electromagnetic valve 6 cuts off the executive component of steam when constituting the action of protection loop with pneumatic stopping valve 8.Pneumatic stopping valve 8 all can cut off steam when pressurized air disappears or have a power failure.

Described electric heater PID executive component is made of little disconnection pass 21, solid-state relay group 15, contactor 16, electric heating assembly 18; Electric heating assembly 18 is provided with temperature detect switch (TDS) 17.Electric heater PID executive component is subjected to 3 regulation and control of electric heating intelligent PID temp controlled meter.Temperature switch 17 is installed on the electric heater component 18, directly cuts off the coil power protection system of contactor 16 when blower fan belt fracture or solid-state relay puncture when causing temperature too high action.

The utility model is after electricity is sent in start, and system at first needs the artificial selection mode of operation, and manual state or auto state, auto state acquiescence down are that Steam Heating is preferential, need to select electrical heating or Steam Heating under the manual state.No matter be that electric heating switches to steam heat, still steam heat switches to electric heating, system all can be sent to real time temperature in the PID temp controlled meter, after the time delay (can set) of heating up, on current real time temperature basis, increase intensification temperature (can set), after through the time delay (can set) of heating up, again (can set) preceding temperature time delay that heats up, add intensification temperature (can set), be sent in the Programmable Logic Controller 1.So circulation, up to system temperature with till design temperature is identical.This process is regardless of manually and auto state, initially send electricity also can carry out this state.When the local temperature over-range of steam heat, after the steam heat temperature sensor sent the overtemperature signal, steam electromagnetic valve 6 stopped closing, and after temperature was recovered to set, steam electromagnetic valve 6 can automatically reset.When the local temperature over-range (limit temperature is set on temp controlled meter) of electric heating, can stop electrical heating, and the output of warning is arranged.Temperature sensor 14 is arranged on the correct position that can react the greenhouse bulk temperature, and Programmable Logic Controller 1 can be according to the setting value of this temperature automatic slowly correction operation PID temp controlled meter.Therefore has the effect that intelligence is regulated.Electric heating temperature sensor 13 and steam heat temperature sensor 12 are installed on the air channel can experience temperature variation faster, and its effect is that the steady heat source temperature prevents overshoot.Programmable Logic Controller 1 can be finely tuned PID temp controlled meter setting value then according to the detected value error of calculation of temperature sensor 14, the most at last the temperature range that requiring of ambient-temp-stable.Be lower than when setting lower limit certain hour (can revise) when Programmable Logic Controller 1 detects electro connecting pressure gauge 9, can automatically switch to electrical heating according to actual conditions.When detecting the vapor pressure recovery, time-delay (can revise delay value) according to actual conditions.

The utility model can change the set point that intelligence is revised temp controlled meter automatically according to greenhouse temperature; According to thermal source situation automatic switchover thermal source (electricity or steam); According to automatic thermal source behind the greenhouse temperature overtemperature.Solved thus that greenhouse temperature control is inaccurate, different heat sources can not automatically switch, greenhouse temperature does not have problems such as anti-overheating protection.

Claims

1. intelligent cellular incubation greenhouse temperature control device, include Programmable Logic Controller (1), display screen (2), temperature sensor, it is characterized in that Programmable Logic Controller (1) is serially connected with Steam Heating PID executive component and electric heater PID executive component respectively; Programmable Logic Controller (1) links to each other with electric heating intelligent PID temp controlled meter (3), Steam Heating intelligent PID temp controlled meter (4) by data line; The signal receiving end of Programmable Logic Controller (1) links to each other with greenhouse temperature sensor (14), electric heating temperature sensor (13) and steam heat temperature sensor (12) respectively; Display screen (2) is connected with Programmable Logic Controller (1) by data line.

2. intelligent cellular incubation greenhouse temperature control device according to claim 1 is characterized in that described Steam Heating PID executive component is made of electropneumatic transducer (5), ratio barrier film variable valve (7), heat interchanger (19), steam trap (20); Be connected with electro connecting pressure gauge (9) at Programmable Logic Controller (1); On electropneumatic transducer (5), be connected with steam electromagnetic valve (6) and pneumatic stopping valve (8).

3. intelligent cellular incubation greenhouse temperature control device according to claim 1 is characterized in that described electric heater PID executive component closes (21), solid-state relay group (15), contactor (16), electric heating assembly (8) formation by little disconnection; Electric heating assembly (8) is provided with temperature detect switch (TDS) (17).

4. intelligent cellular incubation greenhouse temperature control device according to claim 1 is characterized in that described electric heating intelligent PID temp controlled meter (3) and Steam Heating intelligent PID temp controlled meter (4) adopt the two PT100 compound sensors of four-wire system.