CN2240697Y

CN2240697Y - Freezing type air drier controller

Info

Publication number: CN2240697Y
Application number: CN 95223685
Authority: CN
Inventors: 李晋华
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-10-09
Filing date: 1995-10-09
Publication date: 1996-11-20
Anticipated expiration: 2005-10-09

Abstract

The utility model relates to an improved freezing type air drier controller chiefly comprising the surrounding, the inspired air, a compressor cooling medium return pipeline and a condenser, etc. A temperature sensor and a water level sensing rod unit are arranged on a freezing and drying equipment and are connected in a control circuit. The control circuit comprises a voltage comparative amplifying circuit, a water level sensing circuit, two voltage comparative circuits, a CPU microprocessor, a function drive circuit and a state display circuit. By means of the matching of each sensor and each control circuit, the running state of the freezing type air drier controller can be monitored to remind the users of the abnormal case.

Description

The refrigerated type air dryer control device

The utility model relates to a kind of improved cold medium compressor supervision, control device, particularly to the improvement of refrigerated type air dryer control device, make freeze drying equipment go into the temperature degree, go into vaporous condition, whether compressor normal, coolant quantity, draining, cleaning and compressor start are able to automatic monitoring, control, to reach practical effect.

Press, dry goods also has the freezing type cold air drying mode of low temperature except that high temperature drying is arranged, and freeze drier is with the type of cooling, with water recovery to reach air dried purpose.That is; with refrigerant; compressor; condenser; the freeze drying equipment that evaporimeter constituted produces the cool drying effect; and the control mode of traditional type is nothing more than dual mode as shown in Figure 1; (A) with simple switch SW; overload protective device O; L constitutes; its just simple fan electromotor M that uses; compressor 54 is done disconnected; the action control of energising; the basic monitoring effect that does not have other; (B) with current sensor CT; overload protective device O; L does protection; do logical with several relay R ELAY again; outage control, it (for example: temperature does not also have other function of watch-dog; coolant quantity; draining).So traditional device is simple switching function, equipment be there is no auxiliary, increase effect part, the deficiency of many-sided practicality is still arranged.

The purpose of this utility model is to guarantee that equipment can monitor unfavorable condition and remind the user to get rid of immediately in running, and the phase can keep operating high-qualityly, and more can thereby reduce the demand of artificial on-site supervision, reaches almost full automatic effect.

The diagram part:

Fig. 1 is two kinds of control device schematic diagrames of traditional type;

Fig. 2 is the utility model freeze drying equipment schematic diagram;

Fig. 3 is the line configuring schematic diagram of Fig. 2;

Fig. 4 is the utility model control circuit schematic diagram.

Wherein:

SW switch TR triode

O, L overload protective device TH photo-coupler

M fan electromotor LED light

CT current inductor 10,11,12 voltage contrasting amplified circuits

RELAY relay 20 water level sensing circuit

TS evaporimeter 30 function drive circuits

TM condenser 40 status display circuits

NTC1 ambient temperature inductor 50 buzzers

NTC2 goes into temperature degree inductor 51 fan governors

NTC3 condenser temperature inductor 52 magnetic valves

The fan governor that NTC4 refrigerant return pipe road temperature inductor 53 cleans

W water level sensing rod 54 compressors

CPU microprocessor 55 automatic water traps

VT1, VT2 integrated circuit

See also Fig. 2-4, mainly be: a freeze drying equipment, in the gas that enters of evaporimeter TS The pipe place establishes into temperature degree inductor NTC2, establishes the temperature sense of refrigerant return pipe road in compressor 54 pipelines Answer device NTC4, establish condenser temperature inductor TNC3, establish week in suitable place in condenser TM pipeline Suffer environment temperature inductor NTC1, establish water level sensing rod W in the bottom of outlet pipe, and each Temperature inductor and water level sensing rod then are connected to control circuit; This control circuit then comprises:

One group of voltage contrasting amplified circuit 10,11 is by integrated circuit VT2, VT1, variable resistor and connect each temperature inductor NTC1,2,3,4 constitutes, but and temperature sensor produces voltage signal output; Its variable resistor is then as the required voltage value that can set reaction;

One voltage contrasting amplified circuit 12 be provided with current sensor CT, and whether the revolution electric current of sensing compressor is normal;

One water level sensing circuit 20, W is constituted by triode TR, photo-coupler TH and water level sensing rod, in order to sense tracheae inner product regimen condition, makes automatic water trap 55 drainings via CPU, or the signal that gives the alarm when undesired;

One CPU microprocessor has the function that can store setting value, comparison, computing, and signal is understood, and gives the required situation action of output control;

One function drive circuit 30, by a plurality of photo-coupler TH, relay and be connected to buzzer 50, fan governor 51, magnetic valve (switch) 52, the fan governor 53, the compressor 54 that clean constituted;

One status display circuit 40 is made of a plurality of LED light, the situation in the time of can operating according to equipment and lighting;

According to above-mentioned element, configuration and control circuit, work of the present utility model, effect are described as follows: (please consulting Fig. 3,4 again).

One. the sensing ambient temperature is undesired:

When ambient temperature is higher than the setting value of NTC1 ambient temperature inductor, NTC1 promptly sends signal to integrated circuit VT1, voltage comparator circuit 11 promptly moves, and signal is sent to CPU, promptly give function drive circuit 30 and make buzzer 50 give the alarm signal is defeated respectively after treatment, and defeated give status display circuit 40 and make LED light bright, the user promptly need get rid of the abnormal situation of ambient temperature, and the quality of preferable work done.

Two. it is undesired that sensing is gone into the interior air themperature of tracheae:

The required air of freezing air-cooling system is imported by the air compressor machine running, and air of being squeezed into such as temperature are when too high, it is gone into temperature degree inductor NTC2 sensing and learns, and make voltage contrasting amplified circuit 11 move, signal is transported to CPU, also make function drive circuit 30, status display circuit 40 actions, make buzzer 50, LED light send alert news, the user can learn and get rid of to go into gas condition of overhigh temperature, the effect so that equipment is brought into normal play.

Three. start shooting from command of execution compressor:

Press, need fan, compressor 54, air compressor machine all to move during work, and the device of traditional type needs manually start respectively air compressor machine and inflates and start equipment, the utility model then need not independent operation, and only need start air compressor machine can be from command of execution fan, compressor start; When air compressor machine starts the compressed generation heat of compression of air when turning round, compressed air inflow tracheae, it goes into temperature degree inductor NTC2 value must be greater than ambient temperature inductor NTC1 value, when otherwise air compressor machine does not move, NTC2 and NTC1 value are much at one, and the signal of temperature approach, can make voltage contrasting amplified circuit 11 actions, fail and give signal to CPU, can make 30 actions of function drive circuit, and make fan governor 51 action launching fans, and make compressor 54 actions, but promptly reach the effect of starting air compressor machine running Auto Power On.

Four. sensing condenser poor heat radiation and cold medium shortage:

When condenser TM poor heat radiation or compressor cold medium shortage, when its condenser temperature inductor NTC3 or refrigerant return pipe road temperature inductor NTC4 get sensing pipeline abnormal temperature, make another voltage contrasting amplified circuit 10 actions, and the defeated CPU that gives, and make function drive circuit 30 move, its fan governor 51 is opened circuit stop fan and stop compressor 54, reach the abnormal effect of automatic checkout equipment.

Five. clean automatically:

When the condenser laying dust in the equipment, can reduce the integral heat sink effect, must be removed, can reach normal heat radiation and cooling effect; CPU can preestablish time numerical value, also in other words, when running reaches setting-up time, CPU meeting output signal, make make fan stop 51 one times of outage of fan governor of function drive circuit 30, even the fan governor that cleans 53 actions make fan be inverted status; And start fan governor 51 once more and make interior wing keep inverted status, and the wind direction that the fan counter-rotating is shed promptly brushes toward equipment, the dust that equipment is accumulated is removed, after a period of time, CPU makes the fan governor 53 of cleaning stop again, allow fan governor 51 reinstatement attitudes, promptly reach the effect of automatic dust out of a time.

Six. whether draining is normal for the sensing automatic water trap:

Because of the contained water vapour of compressed air is met the situation that cold meeting produces into knot water, that is, having the situation of moisture content in the evaporator tube, this ponding of face can not be too much, otherwise can cause the equipment work done to lose efficacy.In just often by automatic water trap 55 drainings, when automatic water trap 55 inefficacies take place when, ponding must be recorded by water level sensing rod W, give voltage contrasting amplified circuit 12 and send signal, its triode TR obtains bias voltage and conducting is coupled to CPU by photo-coupler TH, and make function drive circuit 30 move, buzzer 50 promptly gives the alarm, and the LED light of writ attitude display circuit 40 is bright simultaneously, and the user then knows and need fix a breakdown.

Seven. the sensing compressor current is undesired:

When the Parts Breakdown in spread of voltage or the compressor; the electric current of compressor loop must be undesired; and learn by the current sensor CT of voltage contrasting amplified circuit 12; make voltage contrasting amplified circuit 12 actions; signal is transported to CPU; CPU is that output signal makes function drive circuit 30 action that fan governor 51 is opened circuit stopping fan, stops compressor 54; and buzzer 50 sound, LED light are bright; that is decommission; need give maintenance and reduce spoilage, thus the effect of autostop when realizing fault is arranged.

Claims

1. improved refrigerated type air dryer control device, mainly be: a freeze drying equipment, the tracheae place of going in evaporimeter establishes into temperature degree inductor, establishes refrigerant return pipe road temperature inductor, establishes the condenser temperature inductor, establishes the ambient temperature inductor, establishes a water level sensing rod in the bottom of outlet pipe in appropriate location in condenser pipe in compressor circuit, and each temperature inductor and water level sensing rod then are connected to control circuit; This control circuit then comprises:

One group of voltage contrasting amplified circuit, by integrated circuit, variable resistor and connect each temperature inductor and constituted, but and temperature sensor produces voltage signal output; Its variable resistor is then as the required voltage value that can set reaction;

One voltage contrasting amplified circuit is provided with current sensor, and whether sensing compressor operation electric current is normal;

One water level sensing circuit is made of triode, photo-coupler and water level sensing rod institute, in order to sense tracheae inner product regimen condition, makes the automatic water trap draining via CPU, or the signal that gives the alarm when undesired;

One microprocessor has the function that can remember setting value, comparison, computing, and signal is understood, and gives the required situation action of output control;

One function drive circuit is made of a plurality of photo-couplers, relay and the fan governor, the compressor that are connected to a pair of buzzer, fan governor, magnetic valve, cleaning;

One status display circuit is made of a plurality of LED light, the situation in the time of can operating according to equipment and lighting;

According to above-mentioned element, the composition of control circuit, by the temperature sensing of each temperature inductor, must be via control circuit in ambient temperature, go into temperature degree, heat radiation, when refrigerant is undesired, it is bright with indicator lamp to give the alarm; And by water level sensing rod, control circuit, in condensate water discharge give the alarm when undesired bright with indicator lamp; And by current sensor, control circuit, and can make fan, compressor stop and giving the alarm, indicator lamp is bright; And the CPU microprocessor can set the fan forward and backward time, and must according to the time chien shih fan counter-rotating, wind direction is oppositely blown down the dust in the equipment in order to avoid reduce radiating effect.

2. refrigerated type air dryer control device as claimed in claim 1, its ambient temperature sensor with go into temperature degree sensor, just constitute the comparison of a temperature gap, compressed air flows into tracheae when air compressor machine turns round, its temperature sense value of going into temperature degree sensor must reduce, the difference of this two temperatures inductor can make the control circuit action, and must make fan, compressor action, reaches the effect that the air compressor machine action gets final product Auto Power On.