CN205505556U

CN205505556U - Refrigerator controller

Info

Publication number: CN205505556U
Application number: CN201620154905.9U
Authority: CN
Inventors: 蒋富强
Original assignee: HEFEI SIMAKE ELECTRONICS CO Ltd
Current assignee: HEFEI SIMAKE ELECTRONICS CO Ltd
Priority date: 2016-03-01
Filing date: 2016-03-01
Publication date: 2016-08-24
Anticipated expiration: 2026-03-01

Abstract

The utility model discloses a refrigerator controller, include PLC controller and the control circuit and the drive circuit that are connected with the PLC controller, control circuit includes temperature sensor, keying circuit and thermistor, drive circuit includes the LCD display module, warning circuit, the compressor with change white heating pipe, temperature sensor includes freezer temperature sensor, walk -in temperature sensor and environment temperature sensor, thermistor is the temperature, and the low resistance is big more, connect respectively and the diode in its both ends, then the base of connecting a triode, KM1 coil of compressor series connection, KM2 normally closed interlock and KM3 normally closed interlock, change the series connection of white heating pipe KM2 coil, KM1 normally closed interlock and a KM4 normally closed interlock. The utility model discloses a circuit structure is simple, realizes powerful, has safe and reliable's effect.

Description

A kind of refrigerator controller

Technical field

This utility model relates to a kind of refrigerator controller.

Background technology

Refrigerator has been an indispensable part in the modern life, and common refrigerator all has fresh-keeping chamber and refrigerating chamber two Space, refrigerating chamber would generally occur the phenomenon of frosting under long-term refrigerating effect, and frosting can cause compressor to work, institute To need a defrost circuit to melt to ensure the properly functioning of refrigerator by frost, and the refrigerator of prior art does not has in refrigerator doors There is no warning function in the case of fastening, frequently result in substantial amounts of waste of energy.

Utility model content

(1) to solve the technical problem that

For solving the problems referred to above, the utility model proposes a kind of refrigerator controller.

(2) technical scheme

Refrigerator controller of the present utility model, the control circuit including PLC and being connected with PLC and driving Circuit, described control circuit includes that temperature sensor, key circuit and critesistor, described drive circuit include that LCD shows mould Block, warning circuit, compressor and defrost add heat pipe, and described temperature sensor includes freezer temperature sensor, temperature of refrigerating chamber Sensor and environment temperature sensor, described critesistor is that temperature more low resistance is the biggest, and its two ends connect power supply and two respectively Pole is managed, and then connects the base stage of an audion.

Further, one KM1 coil of described compressor series connection, KM2 normally closed interlock and KM3 normally closed interlock, described defrost Add heat pipe one KM2 coil of series connection, KM1 normally closed interlock and KM4 normally closed interlock.

Further, described warning circuit include the limit switch being arranged in refrigerator doors and connect with limit switch time Between relay, the described time relay is correspondingly arranged on the normally opened electric shock of the time relay, one buzzing of series connection of this normally opened contact Device.

Further, described control circuit includes compressor Control Cprant and defrosting control circuit, and both of which passes through three poles Pipe connects power supply, and the colelctor electrode of described audion is connected to PLC after connecting a KM3 coil and KM4 coil respectively.

(3) beneficial effect

Compared with prior art, it has the advantages that refrigerator controller of the present utility model to this utility model, Limit switch on door closes and will drive alarm report after namely door remains on a period of time after a period of time Police points out series string in surrounding people, defrost and compressor circuit to be associated in the normally closed interlock of catalyst each other, it is ensured that both are not Working, display module is used for display environment temperature, temperature of refrigerating chamber and ambient temperature simultaneously.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.

Fig. 1 is theory diagram of the present utility model；

Fig. 2 is warning circuit schematic diagram of the present utility model；

Fig. 3 is this utility model drive circuit schematic diagram；

Fig. 4 is that this utility model compressor circuit letter is intended to；

Fig. 5 is this utility model defrost circuit diagram.

Detailed description of the invention

As shown in drawings a kind of refrigerator controller, the control circuit including PLC and being connected with PLC and Drive circuit, described control circuit includes that temperature sensor, key circuit and critesistor, described drive circuit include that LCD shows Showing that module, warning circuit, compressor and defrost add heat pipe, described temperature sensor includes freezer temperature sensor, cold room Temperature sensor and environment temperature sensor, described critesistor is that temperature more low resistance is the biggest, and its two ends connect power supply respectively And diode, then connect the base stage of an audion.

Described compressor one KM1 coil of series connection, KM2 normally closed interlock and KM3 normally closed interlock, described defrost adds heat pipe series connection One KM2 coil, KM1 normally closed interlock and KM4 normally closed interlock.

Described warning circuit includes the limit switch being arranged in refrigerator doors and the time relay connected with limit switch, The described time relay is correspondingly arranged on the normally opened electric shock of the time relay, this normally opened contact one buzzer of series connection.

Described control circuit includes compressor Control Cprant and defrosting control circuit, and both of which connects electricity by audion Source, the colelctor electrode of described audion is connected to PLC after connecting a KM3 coil and KM4 coil respectively.

Such as Fig. 2, when refrigerator doors is opened, limit switch SQ close and, time relay KT1 turns on, KT1 after the setting time Still turn on namely refrigerator doors be in open mode then normally opened contact KT1 close and, buzzer energising sound the alarm.

Such as Fig. 3, Fig. 4 and Fig. 5, critesistor RT senses ice the temperature inside the box, along with the increase resistance of temperature reduces, and institute With only when temperature is higher than certain value the base voltage of audion just enough turn-on transistors make KM3 coil turn on, together simultaneously Time KM3 normally open contact in compressor circuit close and, compressor operating, and now KM1 coil conducting, in defrost circuit KM1 contact is opened, and during the in like manner conducting of the KM2 coil in defrost circuit, KM2 contact opens, and defrost adds heat pipe and compressor Work is controlled by controlling KM4 and KM3 by PLC outfan YOO1 and Y000 simultaneously.

Refrigerator controller of the present utility model, has a following useful fruit: refrigerator controller of the present utility model, on door Limit switch closes and alarm equipment alarm will be driven to point out after namely door remains on a period of time after a period of time In surrounding people, defrost and compressor circuit, series string is associated in the normally closed interlock of catalyst each other, it is ensured that work when both are different, Display module is used for display environment temperature, temperature of refrigerating chamber and ambient temperature.

Embodiment described above is only to be described preferred implementation of the present utility model, not to this practicality Novel spirit and scope are defined.On the premise of without departing from this utility model design concept, this area ordinary person couple Various modification that the technical solution of the utility model is made and improvement, all should drop into protection domain of the present utility model, this reality With the novel technology contents being claimed, all record in detail in the claims.

Claims

1. a refrigerator controller, it is characterised in that: include PLC and the control circuit being connected with PLC and drive Galvanic electricity road, described control circuit includes that temperature sensor, key circuit and critesistor, described drive circuit include that LCD shows Module, warning circuit, compressor and defrost add heat pipe, and described temperature sensor includes freezer temperature sensor, cold preservation room temperature Degree sensor and environment temperature sensor, described critesistor is that temperature more low resistance is the biggest, its two ends connect respectively power supply and Diode, then connects the base stage of an audion.

Refrigerator controller the most according to claim 1, it is characterised in that: described compressor series connection one KM1 coil, KM2 Normally closed interlock and KM3 normally closed interlock, described defrost adds heat pipe one KM2 coil of series connection, KM1 normally closed interlock and KM4 normally closed interlock.

Refrigerator controller the most according to claim 1, it is characterised in that: described warning circuit includes being arranged in refrigerator doors Limit switch and the time relay connected with limit switch, the described time relay is correspondingly arranged on the normal of the time relay Open electric shock, this normally opened contact one buzzer of series connection.

Refrigerator controller the most according to claim 1, it is characterised in that: described control circuit includes compressor Control Cprant With defrosting control circuit, both of which connects power supply by audion, and the colelctor electrode of described audion connects a KM3 coil respectively It is connected to PLC with after KM4 coil.