CN201391443Y

CN201391443Y - Compressor protection circuit

Info

Publication number: CN201391443Y
Application number: CN200920107724U
Authority: CN
Inventors: 王开锋; 乐达文
Original assignee: Dongguan Taian Yiqiao Industry Co ltd
Current assignee: GUANGDONG TAIAN YIQIAO GAS EQUIPMENT CO Ltd
Priority date: 2009-04-27
Filing date: 2009-04-27
Publication date: 2010-01-27
Anticipated expiration: 2019-04-27

Abstract

The utility model relates to an electrical apparatus supply circuit technical field refers in particular to compressor protection circuit, it includes the contactor, electric capacity, thermal relay, the temperature controller, the fan, input power supply, play the wire of short circuit effect, No. two wires, open and stop the switch, thermal relay, input power supply constitutes the return circuit, be equipped with on the circuit and open and stop the switch, it has the temperature controller to connect in parallel on the circuit behind thermal relay, the circuit of fan series connection, it has thermal protector to establish ties on the circuit, electric capacity, thermal protector establishes ties in the coil return circuit of contactor, the movable contact of a looks electrode of contactor is connected through a wire short circuit electricity, the coil other end is connected with high-low voltage switch electricity, its safety in utilization, stable performance.

Description

The compressor protection circuit

Technical field:

The utility model relates to electric power supply circuit engineering field, refers in particular to the compressor protection circuit.

Background technique:

At present, on the compressor protection circuit design, have defective, exactly when undesirable condition having occurred in the compressor operating, heat protector can not fundamentally be implemented protection, is easy to the circuit of compressor is damaged; Because the heat protector of general single-phase compressor is close on the shell of compressor, during operation, as following point appears, as: lack that freon or refrigeration oil, condenser capacity diminish, the condenser heat radiation is bad, cooling blower damages, the cooling waterpump system is bad etc., can cause that the head electrorheological is big, temperature exceeding standard, heat protector can cut off the head power supply, but along with head quits work, the casing temperature can reduce rapidly, after the thermometal sheet cooling of heat protector, circuit can be connected automatically, and head can recover again to start; At this moment, above-mentioned undesirable condition is not resolved, and so frequent repeatedly startup and disconnection is easy to damage head, brings very big inconvenience to use.

The model utility content:

The purpose of this utility model is at the deficiencies in the prior art, and improves a kind of compressor protection circuit, and it is safe in utilization, stable performance.

For achieving the above object, the utility model adopts following technological scheme, it comprises contactor, electric capacity, thermorelay, temp controller, blower fan, the input power supply, play a lead of short circuit effect, No. two leads, start stop switch, thermorelay, the input power supply constitutes the loop, on circuit, be provided with start stop switch, on the circuit behind the thermorelay, be parallel with temp controller, the circuit of blower fan series connection, on circuit, be in series with heat protector, electric capacity, heat protector is series in the wire loop of contactor, the movable contact of one phase electrode of contactor is electrically connected by a lead short circuit, and the coil the other end is electrically connected with high and low voltage switch;

The ring current of described contactor is electrically connected realization by No. two leads with the output terminal of heat protector;

Be associated with run indicator on the circuit behind the described start stop switch;

The two ends of described out-put supply are electrically connected with power supply indicator.

The utility model beneficial effect is: the movable contact of a phase electrode of contactor is electrically connected by a lead short circuit, and the coil the other end is electrically connected with high and low voltage switch; The ring current of contactor is electrically connected realization by No. two leads with the output terminal of heat protector; when equipment work produces undesirable condition; heat protector meeting tripping; can cut off the complete machine power supply; complete machine is quit work, have only starting device once more, equipment could be worked; can be because of spontaneous continually startup after the heat protector cooling, and damage compressor.

Description of drawings:

Fig. 1 prior art circuits schematic diagram;

Fig. 2 is circuit theory diagrams of the present utility model;

Fig. 3 is mode of execution circuit theory diagrams of the present utility model.

Embodiment:

See Fig. 2; shown in 3: the utility model comprises contactor 1; electric capacity 2; thermorelay 3; temp controller 4; blower fan 5; input power supply 10; play a lead 1A of short circuit effect; No. two lead 2A; start stop switch 7; thermorelay 3; input power supply 10 constitutes the loop; on circuit, be provided with start stop switch 7; on the circuit behind the thermorelay 3, be parallel with temp controller 4; the circuit 45 of blower fan 5 series connection; on circuit, be in series with heat protector 6; electric capacity 2; heat protector 6 is series in the wire loop of contactor 1; but also in the input circuit of Access Control circuit 400; the movable contact of one phase electrode of contactor 1 is electrically connected by a lead 1A short circuit, and the coil the other end is electrically connected with high and low voltage switch 200.

The ring current of described contactor 1 is electrically connected realization by No. two lead 2A with the output terminal of heat protector 6; when freon or refrigeration oil occurring lacking; condenser capacity diminishes; the condenser heat radiation is bad; cooling blower damages; during problems such as the cooling waterpump system is bad; it is big that the head electric current can become; the casing temperature exceeding standard; heat protector 6 can disconnect; contactor coil 300 loses ring current; complete machine is quit work; when the casing temperature reduces rapidly; after the thermometal sheet cooling of heat protector 6 was connected, complete machine can not resumed work yet, and thoroughly protection is implemented in the bad operation that above-mentioned reason causes.

Be associated with run indicator 71 on the circuit behind the described start stop switch 7;

The two ends of described input power supply 10 are electrically connected with power supply indicator 100.

The utility model is connected on the external heat protector 6 of compressor in the control circuit of complete machine; 400 is control circuit; when heat protector 6 disconnects; lose electric current on the AA electricity haptic element on the control circuit board 400; at this moment BB electricity haptic element output; power loop disconnects on the contactor coil 300, the complete machine stoppage protection of not working.

Owing to when various bad phenomenon finally make the temperature exceeding standard of compression case, cut off circuitry work, also can utilize relay, tutorial light prompting, the overheating problem of compressor is so that in time fix a breakdown.

As shown in Figure 1: present circuit on circuit structure, the function imperfection of heat protector.

Claims

1. Compressor protection circuit, which includes contactor (1), capacitor (2), thermal relay (3), temperature controller (4), fan (5), input power supply (10), and No. 1 short-circuit function Wire (1A), No. 2 wire (2A), start-stop switch (7), it is characterized in that: thermal relay (3), input power supply (10) constitute loop, be provided with start-stop switch (7) on the circuit, in On the circuit behind the thermal relay (3), a circuit (45) connected in parallel with a thermostat (4), a blower fan (5) is connected in series, and a thermal protector (6), a capacitor (2) are connected in series on the circuit, and the thermal protector ( 6) Connected in series in the coil circuit of the contactor (1), the movable contact of one phase electrode of the contactor (1) is electrically connected through a short circuit of the No. 1 wire (1A), and the other end of the coil is electrically connected to the high and low voltage switch (200) .

2. The compressor protection circuit according to claim 1, characterized in that: the circuit power supply of the contactor (1) is electrically connected to the output end of the thermal protector (6) through the second wire (2A).

3. The compressor protection circuit according to claim 1, characterized in that a running indicator light (71) is associated with the circuit behind the start-stop switch (7).

4. The compressor protection circuit according to claim 1, characterized in that: the two ends of the input power supply (10) are electrically connected with a power indicator light (100).