CN1435617A

CN1435617A - Water supply pipe heater starting structure for automatic ice maker of refrigerator

Info

Publication number: CN1435617A
Application number: CN 02100533
Authority: CN
Inventors: 李沅福
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: Taizhou LG Electronics Refrigeration Co Ltd
Priority date: 2002-01-31
Filing date: 2002-01-31
Publication date: 2003-08-13
Anticipated expiration: 2022-01-31
Also published as: CN1243206C

Abstract

A starter structure of the heater for the water supplying tube of automatic ice maker in electric refrigerator is composed of a heater for preventing the water in water supplying tube from being iced, a power supply for selectively supplying electric energy to said heater, and a controller for controlling water supply to ice tray and the electric energy supply, and starting the heater.

Description

Water supply pipe heater starting structure for automatic ice maker of refrigerator

Technical field

The present invention relates to prevent to freeze in the feed pipe, reduce water supply pipe heater power consumption, the startup structure of a kind of water supply pipe heater that also can use safely by smaller heat on relatively shorter pipe.

Background technology

Accompanying drawing 1～3 expression is provided with part-structure figure relevant with feedwater in the existing refrigerator of ice machine.Feed pipe 1 links with outside water-supply source, and for water is supplied in the refrigerator, feed pipe 1 is connected with penstock 3.One side of penstock 3 and other side link respectively the water pipe that can carry from penstock 3 flowing water, the water pipe 4 that is attached at penstock 3 one sides is attached in the water pot 5 that can store water, water pipe 4 ' the feed-tank 7 preceding with being arranged on refrigerator that links water pot 5 other sides links, supplies water to feed-tank 7.The side in addition of water pot and feed pipe 10 bindings outside the case that the refrigerator rear side upwards prolongs, the upper end of feed pipe 10 links with the case internal feed pipe 12 that is located in the refrigerator, in order easily in ice clathrate ice pan 14, to supply water, case internal feed pipe 12 is obliquely installed downwards.Ice pan 14 sides are provided with temperature detecting sensor 16, and its function is to measure the icing degree of water in the ice pan.The ice pan below is provided with ice pan tube 18, and its effect is to be stored to form ice in the ice pan.

In order to prevent that the low temperature in the refrigerator from freeze the case internal feed pipe, the privileged site on the case internal feed pipe twines and is provided with water supply pipe heater 20.The defrosting sensor 22 that freezes on temperature detecting sensor 16 and the sensing evaporator is attached at respectively on the microcomputer 24 of control part.Control by microcomputer is formed with the relay 26 that selects the switching circuit that lands.Relay 26 is provided with water supply pipe heater 20 and Defrost heater 28 in parallel respectively, and a side of relay 26 is connected with power supply 30.

Water through the feed pipe that links to each other with outside water-supply source is supplied flows to water pot and the outer feed pipe of tying mutually with water pipe 4 10 of case by penstock 3.The water that is stored in the water pot can link the feed-tank 7 that is located at before the refrigerator by water pipe 4 ' flow to and manage 4 ｀, can be according to user's requirement supply work water.

The water that feed pipe is carried on refrigerator outside case flows to ice pan 14 by the case internal feed pipe 12 that is located at the refrigerator inboard.Water in the ice pan 14 drives through freeze cycle and becomes ice, and the ice keeping is in the ice pan tube.Drive by water supply pipe heater, prevent that the interior low temperature of refrigerator from build-up ice the water that is flowing in the case internal feed pipe and blocking in the case internal feed pipe.Driving the water that is thawed by water supply pipe heater discharges to the outside.

Water supply pipe heater 20 and Defrost heater 28 parallel connections are located in the adiabatic circuits that links with power supply 30, water supply pipe heater and Defrost heater, and the input signal of the defrosting sensor that whether freezes by the evaporator surface measured that is located in the refrigerator starts.By 22 to microcomputer 24 input signals, microcomputer 24 transmits signals to relay 26 links circuit.By linking, apply power supply to water supply pipe heater and Defrost heater, water supply pipe heater 20 and Defrost heater 28 heat case internal feed pipe 12 and evaporimeter respectively.

But there is following shortcoming in the startup structure with existing water supply pipe heater of said structure.Prevent the driving of water supply pipe heater icing in the case internal feed pipe, irrelevant with case internal feed pipe state, be to be undertaken by measuring the defrosting sensor that whether freezes on the evaporimeter.Have in case internal feed pipe inner product freeze under the state of water after, the driving of water supply pipe heater also is not easy to melt ice; Even can melt ice, but the low temperature in the refrigerator still can make regelation in the case internal feed pipe, makes the water of supply can not successfully pass through the case internal feed pipe.At water supply pipe heater breaking out of fire easily under the short situation of length is set, in order to protect product that the thermal design of heater is smaller.Under certain voltage, heat dwindle the method that can select to strengthen resistance, also can select to reduce voltage method.

In order to strengthen resistance, need reduce the water supply pipe heater diameter of wire, but bring the making difficulty for making the following lead of certain diameter; Owing to shortened the length of lead, make resistance decreasing, bring the water supply pipe heater heat to increase problem.

Be applicable to the reduction resistive method that can reduce the water supply pipe heater heat for employing,, brought the rising of fee of material, because safety problems such as the easy breaking out of fires of switching on continuously though consider two heaters are connected on and form water supply pipe heater on the power supply.

Summary of the invention

The purpose of this utility model is to avoid weak point of the prior art, stay the interior water of feed pipe and provide the less heat of a kind of usefulness to remove, make the water of supply can successfully pass through feed pipe, shorten heat time heating time and reduce the heat that produces, can use the water supply pipe heater starting structure for automatic ice maker of refrigerator method of comparison short tube safely.

Can take following technical scheme to realize purpose.

A kind of startup structure of automatic ice maker of refrigerator water supply pipe heater is provided with the water supply pipe heater that can prevent the feed pipe inner icing; It is characterized in that, include the person of choosing ground and apply means to the power supply that described water supply pipe heater applies power supply; Control device control is supplied water through described feed pipe in ice pan time, to control described power supply and apply means in water supply this control device that finishes, this control device is controlled the startup of described water supply pipe heater.

Aforesaid water supply pipe heater starting structure for automatic ice maker of refrigerator, wherein at the temperature detecting sensor of measuring through feed pipe supply water temperature in ice pan, described control device is measured temperature control signals with the temperature detecting sensor, the start-up time of control water supply pipe heater.

Aforesaid water supply pipe heater starting structure for automatic ice maker of refrigerator, wherein the half-wave diode is located at water supply pipe heater and power supply applies between the means.

The relative prior art of the technical program has following advantage and effect:

Though with less heat but can remove the water of staying in the feed pipe, make the water of supply successfully pass through feed pipe; Water supply pipe heater and the heat that reduced in comparison heat time heating time and reduction in the past produces can use the relatively shorter pipe of length safely, can improve the stability of product.

Description of drawings

Fig. 1 is the existing refrigerator major part structure oblique view relevant with feedwater;

Fig. 2 is mounted in the heater sectional drawing on the existing refrigerator internal feed pipe;

Fig. 3 starts connected circuit figure between the existing water supply pipe heater parts;

Fig. 4 is connected circuit figure between example water supply pipe heater of the present invention and the parts;

Fig. 5 is connected circuit figure between another example water supply pipe heater of the present invention and the parts;

Fig. 6 is the effective driving time chart of example water supply pipe heater and water supply system.

The specific embodiment

In conjunction with the accompanying drawings, embodiment is described in further detail the content of the technical program.

Defrosting sensor 30 and temperature detecting sensor 32 link with the microcomputer 34 of control part; Whether have frost on the defrosting sensor senses evaporimeter, temperature detecting sensor 32 is measured the temperature that is contained in water in the ice pan.Microprocessor is housed on the circuit board, and it is to control each interior parts of refrigerator and they are carried out the data processing that microcomputer 34 has its effect of central processing unit function.

A microcomputer 34 and a

double relay

36 and 38 link.Above-mentioned relay 36 and relay 38 apply means as power supply and utilize electro permanent magnetic to start.Relay 36 and relay 38 are by the big voltage of little controlled current system in the microcomputer.Power supply 40 is connected with water supply pipe heater 42 in the relay 36 of one side.For preventing to freeze in the case internal feed pipe, water supply pipe heater 42 is wrapped in the feed pipe outside.Power supply 40 is connected with Defrost heater 44 in the relay 38 of opposite side.In order to melt the frost on the evaporimeter, Defrost heater is located at evaporimeter one side.

Connected circuit figure between accompanying drawing 5 another example water supply pipe heaters of expression and the parts.

The half-wave diode 50 of connecting between water supply pipe heater 42 and the relay 36.The effect of half-wave diode is to dwindle a half voltage that is flowing on the circuit.

In evaporimeter running, if evaporator surface produces frost, the perception of the defrosting sensor 30 by being located at evaporimeter one side transmits signals to microcomputer 34.By signal, microcomputer 34 electric current is flowing on relay 36 terminals,, contact is attached to makes relay 36 energisings on the fixed contact so spur contact by the startup of the electromagnet in the relay 36.Startup by relay can make Defrost heater 44 produce heat, and the heat that Defrost heater 44 produces is melted the frost on the evaporimeter.

Become ice as the water in the ice pan, the perception by temperature detecting sensor 32 transmits signals to microcomputer 34.By above-mentioned input signal, microcomputer 34 controls will push parts in the ice pan tube of the ice in the ice pan under being located at ice pan.Microcomputer 34 controls are supplied water in ice pan by feed pipe, and relay 36 began to start after water supply finished.

The startup of relay 36 is flowed along circuit to the electricity that power supply 40 transmits, and makes water supply pipe heater produce heat.Water supply pipe heater heats the feed pipe that water supply finishes, and removes the water of staying in the feed pipe by evaporation.After water in the feed pipe is removed certain hour,, stop the startup of water supply pipe heater by the startup of microcomputer slew relay.

Fig. 6 represents example water supply pipe heater and the effective driving time chart of water supply system.

Begin to start by feed pipe feedwater back water supply pipe heater 42, start through stopping behind the certain hour.Carry out the startup of water supply pipe heater 42 and water supply system repeatedly.Flow with the voltage of the first half by half-wave diode 50 in another example, do not dwindling under the diameter of wire situation, also can reduce the heat that water supply pipe heater produces.

Reduce to water supply pipe heater 42 supply voltages by half-wave diode 50, be not limited only to this, as long as can reduce device, applicable to the present invention to water supply pipe heater 42 supply voltages.

Example is different with prior art, and the driving of water supply pipe heater 42 and Defrost heater 44 is independently to carry out; Water supply pipe heater begins to start after finishing through feed pipe water supply, and the heat of generation can be removed the water of staying in the feed pipe.

To above-mentioned startup structure, though water supply pipe heater 42 has reduced the heat that produces with comparing in the past, also can prevent to freeze in the feed pipe, reduce when consuming electric power, the water of supply is flowed in feed pipe smoothly.

By half power supply that uses half-wave diode 50 to reduce,, use above-mentioned water supply pipe heater can avoid breaking out of fire so can reduce the heat that half water supply pipe heater 42 produces to water supply pipe heater 42 supplies.Owing to need not establish the transformer that reduces voltage in addition, so reduced the cost of product.

Claims

1, a kind of startup structure of automatic ice maker of refrigerator water supply pipe heater is provided with the water supply pipe heater that can prevent the feed pipe inner icing; It is characterized in that, include the person of choosing ground and apply means to the power supply that described water supply pipe heater applies power supply; Control device control is supplied water through described feed pipe in ice pan time, to control described power supply and apply means in water supply this control device that finishes, this control device is controlled the startup of described water supply pipe heater.

2, water supply pipe heater starting structure for automatic ice maker of refrigerator according to claim 1, it is characterized in that measuring temperature detecting sensor through feed pipe supply water temperature in ice pan, described control device is measured temperature control signals with the temperature detecting sensor, the start-up time of control water supply pipe heater.

3, water supply pipe heater starting structure for automatic ice maker of refrigerator according to claim 2 is characterized in that the half-wave diode is located at water supply pipe heater and power supply applies between the means.