KR100846115B1 - Controlling process for refrigerator - Google Patents

Abstract

A method for controlling a refrigerator is provided to prevent the overload in a refrigerator compartment and a freezer compartment effectively by positively controlling fans according to the overload condition. A refrigerator comprises a main body divided into a refrigerator compartment and a freezer compartment, a refrigerator compartment evaporator(122) placed inside the refrigerator compartment, a freezer compartment evaporator(124) installed inside the freezer compartment, a compressor(100), and a room temperature sensor. The compressor supplies refrigerant to the refrigerator compartment/freezer compartment evaporators. The room temperature sensor, placed at the outside of the main body, detects the external temperature. A method for controlling the refrigerator includes an external temperature detecting step via the room temperature sensor, and a pressed length operating step for operating a piston till TDC(Top Dead Center) is 0 after increasing the stroke of the piston by moving a stroke reference point of the piston to the bottom when the detected external temperature is in maximum overload condition.

Description

Controlling process for refrigerator

1 is a front view showing a refrigerator according to an embodiment of the present invention,

FIG. 2 is a front view illustrating the inside of the refrigerator of FIG. 1;

3 is a perspective view of each device of the refrigerator shown in FIG. 1;

4 is a configuration diagram of the refrigerator shown in FIG. 3,

5 is a block diagram showing an operation control apparatus of the compressor shown in FIG.

6 is a schematic cross-sectional view showing the inside of the compressor shown in FIG.

7 is a table illustrating a control method of the refrigerator according to the present embodiment.

<Brief description of symbols for the main parts of the drawings>

31: freezer 32: cold storage room

33: freezer door 35L, 35R: refrigerator compartment door

37: gasket 40: body

100: compressor 101: cylinder

102: reciprocating compression section 103: discharge valve

104: voltage detection unit 105: electric circuit unit

106: current detector 107: piston

109 reference point 110: condenser

112 condenser fan 122 refrigerating chamber evaporator

124: freezer compartment evaporator 130: three-way valve

131: R valve 132: refrigerating chamber expansion valve

133: F valve 134: freezer expansion valve

142: refrigerator compartment fan 144: freezer compartment fan

The present invention relates to a control method of a refrigerator, and more particularly, to a control method of a refrigerator for calculating a load according to a temperature difference between an outside air temperature and a high internal temperature of the refrigerator, and changing a driving method of the compressor according to the calculated load. .

In general, a refrigerator includes a compressor, a condenser condensing the refrigerant compressed by the compressor, an expansion valve for expanding the refrigerant condensed in the condenser, an evaporator for evaporating the refrigerant expanded in the expansion valve, and an increase efficiency of the refrigerant introduced into the evaporator. It comprises a blower fan for blowing air to the evaporator to improve the.

In the refrigerator according to the prior art, when the temperature of the refrigerating compartment or the freezing compartment is unsatisfactory with the target temperature, the refrigerator is controlled according to the temperature difference between the target temperature and the high internal temperature.

An object of the present invention is to provide a control method of a refrigerator which calculates a load according to a temperature difference between an outside air temperature and a high internal temperature of the refrigerator, and changes a driving method of the compressor according to the calculated load.

Another object of the present invention is to provide a control method of a refrigerator that calculates a load according to a temperature difference between an outside air temperature and a high internal temperature of the refrigerator, and variably controls a blowing fan according to the calculated load.

The present invention includes a main body partitioned into a refrigerating compartment and a freezing compartment, a refrigerating compartment evaporator disposed in the refrigerating compartment, a freezer compartment evaporator disposed in the freezing compartment, a compressor for supplying refrigerant to the refrigerating compartment evaporator and the freezer compartment evaporator, and an outside of the main body. Preparing a room temperature sensor arranged to detect the external temperature, and determine the external temperature through the room temperature sensor, and if the determined external temperature is the maximum overload condition, the stroke reference point of the compressor piston is moved to the bottom side By increasing the stroke of the piston to provide a control method of the refrigerator comprising a sliding amount operation step of operating the piston to a state of TDC = 0.

In this case, the operation of the amount of rolling may be performed at the time of cooling at least one of the refrigerating compartment or the freezing compartment or simultaneous cooling of the refrigerating compartment and the freezing compartment.

In particular, the external temperature of the maximum overload condition may be set to 38 ℃ or more.

And a freezer compartment fan disposed in the freezer compartment for circulating air in the freezer compartment, and a refrigerating compartment fan arranged in the refrigerating compartment for circulating air in the refrigerating compartment. At least one of the high / medium / low wind speed may be driven at a strong wind speed or variable control depending on the load of the freezing compartment or the refrigerating compartment.

According to another aspect of the present invention, a control method of a refrigerator includes a main body divided into a refrigerator compartment and a freezer compartment, a refrigerator compartment evaporator disposed in the refrigerator compartment, a freezer compartment evaporator disposed in the freezer compartment, and a refrigerant in the refrigerator compartment evaporator and the freezer compartment evaporator. And a room temperature sensor disposed outside the main body to sense an external temperature, and determining an external temperature through the room temperature sensor, and a minimum overload in which the determined external temperature is lower than a maximum overload condition. In the case of the condition, operating the piston to the state of TDC = 0 without moving the stroke reference point of the compressor piston, and if the determined external temperature is the maximum overload condition, the stroke reference point of the compressor piston is moved to the bottom side Increase the stroke of the piston, and then move the piston until TDC = 0. It may include the operation of operating the amount of jungle.

Here, the operation of the amount of rolling is performed when at least one of the refrigerating chamber or the freezing chamber is cooled, and the external temperature of the maximum overload condition is 38 ° C. or more, and the external temperature of the minimum overload condition is 35 ° C. or more and less than 38 ° C. It can be set to.

In particular, the refrigerator may further include a freezer compartment disposed in the freezer compartment for circulating air in the freezer compartment, and a refrigerator compartment fan arranged in the refrigerator compartment for circulating air in the refrigerating compartment. At least one of the fans may be driven at a strong wind speed among strong / medium / low wind speeds or may be variably controlled according to the load of the freezing compartment or the refrigerating compartment.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a front view showing a refrigerator according to an embodiment of the present invention, Figure 2 is a front view showing the inside of the refrigerator of FIG.

As shown in FIG. 1 or FIG. 2, the refrigerator according to the present invention includes a main body 40 having a freezing compartment 31 and a refrigerating compartment 32, and a hinge connected to the main body 40. The doors 35L and 35R which open and close the refrigerating chamber 32 are comprised, respectively.

Here, the freezer compartment 31 and the freezer compartment 32 are separated from each other by the partition 33 arranged in the main body 40 so as to prevent cold air from flowing to each other, and the freezer compartment 31 and the refrigerating compartment 32, respectively. A freezer compartment evaporator and a refrigerating compartment evaporator are disposed to cool the space.

3 is a perspective view illustrating each device of the refrigerator illustrated in FIG. 1, and FIG. 4 is a configuration diagram of the refrigerator illustrated in FIG. 3.

As shown in FIG. 3 or FIG. 4, the refrigerator according to the present embodiment includes a compressor 100, a condenser 110 condensing the refrigerant compressed in the compressor 100, and a condenser 110 condensed in the condenser 110. The refrigerant is supplied and evaporated, and the refrigerator compartment evaporator 124 disposed in the freezer compartment 31 and the refrigerator compartment evaporator 122 disposed in the refrigerator compartment 32 and the refrigerant condensed in the condenser 110 are stored in the refrigerator compartment. A three-way valve 130 for supplying the evaporator 122 or the freezer compartment evaporator 124, a refrigerator compartment expansion valve 132 for expanding the refrigerant supplied to the refrigerator compartment evaporator 122, and the freezer compartment evaporator 124. It includes a freezer compartment expansion valve 134 for expanding the supplied refrigerant.

Here, the refrigerating compartment 32 is provided with a refrigerating compartment fan 142 for improving the efficiency of heat exchange of the refrigerating compartment evaporator 122 and circulating air in the refrigerating compartment 32. In addition, the freezer compartment 31 is provided with a freezer compartment 144 for improving the heat exchange efficiency of the freezer compartment evaporator 124 and for circulating air in the freezer compartment 31.

A check valve 150 is disposed on the discharge side of the refrigerating compartment evaporator 122 to prevent the refrigerant of the freezing compartment evaporator 124 from flowing.

The three-way valve 130 may be opened and closed by selecting the flow path of the refrigerant supplied from the condenser 110, any one of the refrigerating chamber expansion valve 132 or the freezing chamber expansion valve 134 to open or close. Can be.

Here, the refrigerating chamber side flow path of the three-way valve 130 is referred to as "R valve 131", the freezer compartment side flow path is referred to as "F valve 133", the opening and closing of the refrigerating chamber side flow path R valve 131 In the on / off of, the opening and closing of the freezing chamber side flow path is referred to as the on / off of the F valve 133.

On the other hand, in the present embodiment, but the three-way valve is arranged, instead of the three-way valve may be arranged on the opening and closing valves in each pipe connected to the refrigerator compartment / freezer compartment evaporator (122) (124).

In addition, the room temperature sensor 42 for sensing the temperature of the room is disposed outside the main body 40.

FIG. 5 is a block diagram showing an operation control apparatus of the compressor shown in FIG. 3, and FIG. 6 is a schematic cross-sectional view showing the inside of the compressor shown in FIG.

The reciprocating compressor according to the present embodiment has no crankshaft for converting rotational motion into linear motion and thus has less frictional loss. Therefore, the reciprocating compressor has a higher compression efficiency than a general compressor in terms of compression efficiency.

When the reciprocating compressor is used in a refrigerator or an air conditioner, the compression ratio of the reciprocating compressor can be varied by varying the stroke voltage input to the reciprocating compressor, thereby freezing the power. Capacity can be controlled.

As shown in FIG. 5, a reciprocating compression unit (L.COMP) 102 for adjusting a cooling force by varying a stroke in vertical movement by a voltage applied to an internal motor according to a stroke command value, and an applied voltage. The voltage detection unit 104 detects a voltage generated in the reciprocating double compression type compression unit (L.COMP) as the stroke is increased, and the reciprocating compression unit is increased as the stroke is increased by an applied voltage. The stroke is calculated from the current detector 106 that detects the current applied to the L.COMP, and the voltage and current detected from the voltage detector 104 and the current detector 106, and the stroke is compared with the stroke command value. And outputs a switching control signal according to the microcomputer 108, and according to the switching control signal of the microcomputer 108, the AC power is interrupted by the triac (Tr1) to the reciprocating compression unit (L.COMP) on It consists of an electrical circuit portion 105 for applying a voltage.

First, the reciprocating compression section (L.COMP) 102, the piston is moved up and down by the applied voltage according to the stroke command value set by the user, thereby the stroke is variable to adjust the cooling force.

On the other hand, the triac Tr1 of the electric circuit unit 105 has an increased stroke due to a longer turn-on period due to the switching control signal of the microcomputer 108, wherein the motor M of the reciprocating compressor L.COMP is increased. The voltage detection unit 104 and the current detection unit 106 detect voltages and currents applied to the microcomputer 108.

Then, the microcomputer 108 calculates a stroke using the applied voltage and current detected from the voltage detector 104 and the current detector 106, and compares the stroke with the stroke command value and accordingly switches the control signal. Outputs

That is, when the calculated stroke is smaller than the stroke command value, the microcomputer 108 outputs a switching control signal for lengthening the on-cycle of the triac Tr1 to convert the voltage applied to the reciprocating compression unit L.COMP. Increase.

Unlike the above, when the calculated stroke is larger than the stroke command value, the microcomputer 108 outputs a switching control signal for shortening the on period of the triac Tr1 and is applied to the reciprocating compression unit L.COMP. Reduce the voltage.

The refrigerator employing the reciprocating compressor as described above executes variable capacity operation control for operating with reduced stroke in order to reduce power consumption.

First, a stroke whose operating capacity of the reciprocating compressor is TDC = 0 is detected, and the stroke and power at the maximum capacity are calculated and stored.

In this way, while operating the reciprocating compressor at the maximum capacity, in order to reduce the power consumption of the refrigerator, the refrigerator control means generates a variable capacity control signal, and thus the compressor control means varies the capacity of the reciprocating compressor. The reciprocating compressor is driven by reducing the stroke to 80% of the maximum capacity.

5 and 6, the compressor 100 has a cylinder 101 therein, a discharge valve 103 for discharging the refrigerant compressed in the cylinder 101, and is controlled according to the stroke. And a piston 107 for compressing the refrigerant inside the cylinder 101.

In this case, the piston 107 is reciprocated at a constant distance inside the cylinder 101, and the piston 107 forms a reference point 109 which is intermediate between forward and backward during the reciprocating movement of the piston 107. .

In this case, when the piston 107 is stroke controlled to the position where the TDC is 0 while the reference point 109 is 0, the capacity of the compressor 100 is operated at 100%, and the reciprocating compression unit By controlling the applied voltage or current, the capacity of the compressor 100 may be varied to 90% or 80%.

Therefore, hereinafter, the compressor 100 is operated with a state of TDC = 0 and is referred to as maximum operation, and the compressor 100 is operated with a predetermined ratio smaller than the maximum operation, referred to as cold power variable operation, and is larger than the maximum operation. Driving with capacity is called jungle driving.

On the other hand, the piston performs the pushing amount operation to compress the refrigerant having a capacity larger than the limited cylinder volume, and the pushing amount operation is possible by moving the reference point 109 of the piston 107 to the bottom side.

That is, by controlling the voltage applied to the piston 107 can move the reference point 109 to the bottom side than the reference point 109, thereby increasing the distance from the front end of the piston 107 to TDC = 0 This can increase the amount of refrigerant that is compressed.

Hereinafter, the contents related to the operation of the amount of rolling is a general matter to those skilled in the art, detailed description thereof will be omitted.

7 is a table illustrating a control method of the refrigerator according to the present embodiment.

This embodiment controls the compressor 100 or the fans 142 and 144 according to the temperature of the room where the refrigerator is arranged.

First, the controller (not shown) of the refrigerator determines that the room temperature detected by the room temperature sensor 42 is higher than 38 ° C. as the maximum overload condition, and determines that the minimum overload condition is between 35 ° C. and 38 ° C. If it is lower than 35 ℃, it is regarded as general operation condition.

That is, since the target temperature of the freezing compartment 31 or the refrigerating compartment 32 is generally formed in a predetermined range during normal operation instead of initial startup, the sudden change in the load is small, but the temperature is changed according to the change in the external temperature of the refrigerator. A large temperature difference occurs in each refrigerator.

Thus, the present embodiment determines the operating conditions of the refrigerator according to the room temperature, and determines the operating conditions of the compressor 100 according to the operating conditions.

Hereinafter, the operation control of the freezer compartment 31 will be described.

When the room temperature is the maximum overload condition of more than 38 ° C, the compressor 100 is driven in the amount of rolling operation, and the freezer compartment fan 144 is operated at a high speed.

When the room temperature is the minimum overload condition of 35 ° C to 38 ° C, the compressor 100 is subjected to a maximum operation of TDC = 0, and the freezer compartment fan 144 is operated at a high speed.

When the room temperature is less than 35 ° C. under normal operating conditions, the compressor 100 is subjected to variable cooling control, and the freezer compartment fan 144 is operated at medium or low speed.

In this case, the compressor 100 is operated by a rolling amount operation, a maximum operation, and a cold power variable control according to the load of the freezing chamber, thereby actively releasing the load according to the external temperature.

In addition, the freezer compartment fan 144 may also be operated at high speed, medium speed, and low speed to actively release the load according to the load according to the external temperature and the refrigerant supplied to the freezer compartment evaporator 124.

Next, the operation control of the refrigerating chamber 32 is as follows.

When the room temperature is the maximum overload condition of more than 38 ° C, the compressor 100 is driven in the amount of rolling operation, and the refrigerating chamber fan 142 is operated at a high speed.

When the room temperature is the minimum overload condition of 35 ° C to 38 ° C, the compressor 100 is subjected to a maximum operation of TDC = 0, and the refrigerating chamber fan 142 is operated at a high speed.

When the room temperature is less than 35 ° C. under normal operating conditions, the compressor 100 is subjected to variable cooling control, and the refrigerating chamber fan 142 is operated at medium speed or low speed.

In this way, the refrigerating chamber 32 can also effectively eliminate the load of the refrigerator according to the external temperature in the same principle as the freezing chamber.

On the other hand, during the initial startup of the refrigerator, the control unit performs a simultaneous operation of simultaneously cooling the refrigerating chamber 32 and the freezing chamber 31, and during the simultaneous operation, the three-way valve 130, R valve 131 and F The valves 133 are all opened to allow the refrigerant to be supplied to both the refrigerator compartment evaporator 122 and the freezer compartment evaporator 124.

Here, even during the simultaneous operation, the maximum overload condition, the minimum overload condition, and the general operation condition are determined by referring to the external temperature of the room, and the compressor 100 and the fans 142 and 144 are determined according to the determined operation condition. To control.

Meanwhile, in the present embodiment, the refrigerator compartment fan 142 or the freezer compartment 144 is controlled to be at high speed, medium speed, and low speed. However, the refrigerator compartment fan 142 or the freezer compartment 144 is based on the load. It is also possible to control the speed of linearly.

In addition, in the present embodiment, the temperature used for determining the maximum overload condition / minimum overload condition / general operation condition may be appropriately changed according to the regional difference, latitude difference, humidity difference, etc. in which the refrigerator is installed.

In addition, the present invention is not limited to the embodiments and drawings disclosed herein, and may be applied by those skilled in the art within the scope of the technical idea of the present invention.

The control method of the refrigerator according to the present invention is determined by dividing it into a maximum overload condition / minimum overload condition / general operation condition according to the external temperature, and according to the determined load condition, the operation condition of the compressor is the amount of driving / maximum operation / cold power. Since it is divided into variable operation, not only the load generated in the refrigerator can be effectively judged, but also the active condition of the compressor can be more effectively resolved by judging the operating conditions of the compressor.

In addition, the control method of the refrigerator according to the present invention is determined by dividing the maximum overload condition / minimum overload condition / general operating conditions according to the external temperature, and actively controls the fan according to the determined load conditions, so that the load of the refrigerating chamber or the freezer compartment It is effective to solve the problem more effectively.

Claims (12)

A main body divided into a refrigerating compartment and a freezing compartment, a refrigerating compartment evaporator disposed in the refrigerating compartment, a freezer compartment evaporator disposed in the freezing compartment, a compressor for supplying refrigerant to the refrigerating compartment evaporator and the freezer compartment evaporator, and disposed outside the main body and externally Prepare a room temperature sensor to detect the temperature Determining an external temperature through the room temperature sensor; If the determined external temperature is the maximum overload condition, the stroke reference point of the compressor piston is moved to the bottom side to increase the stroke of the piston, and then operating the piston amount operation to operate the piston to the state TDC = 0; How to control the refrigerator. The method according to claim 1, The jungle amount driving step A control method of a refrigerator performed at the cooling of at least one of the refrigerating compartment or the freezing compartment. The method according to claim 1, The step of operating the rolling amount control method of the refrigerator performed at the same time cooling the refrigerator compartment and the freezer compartment. The method according to claim 1, The control method of the refrigerator when the external temperature of the maximum overload condition is 38 ℃ or more. The method according to any one of claims 1 to 4, A freezer compartment fan disposed in the freezer compartment for circulating air in the freezer compartment, and a refrigerating compartment fan arranged in the refrigerating compartment for circulating air in the refrigerating compartment, In the step of driving the amount of rain, the control method of the refrigerator to drive at least one of the freezer compartment fan or the refrigerating compartment fan at a strong wind speed of the strong / medium / weak wind speed. The method according to any one of claims 1 to 4, A freezer compartment fan disposed in the freezer compartment for circulating air in the freezer compartment, and a refrigerating compartment fan arranged in the refrigerating compartment for circulating air in the refrigerating compartment, In the step of operating the amount of sliding, at least one of the freezer compartment fan or the refrigerating compartment fan variable control according to the load of the freezer compartment or the refrigerating compartment. A main body divided into a refrigerating compartment and a freezing compartment, a refrigerating compartment evaporator disposed in the refrigerating compartment, a freezer compartment evaporator disposed in the freezing compartment, a compressor for supplying refrigerant to the refrigerating compartment evaporator and the freezer compartment evaporator, and disposed outside the main body and externally Prepare a room temperature sensor to detect the temperature Determining an external temperature through the room temperature sensor; When the determined external temperature is a minimum overload condition lower than a maximum overload condition, operating the piston to a state where TDC = 0 without moving the stroke reference point of the compressor piston; If the determined external temperature is the maximum overload condition, the stroke reference point of the compressor piston is moved to the bottom side to increase the stroke of the piston, and then operating the piston amount operation to operate the piston to the state TDC = 0; How to control the refrigerator. The method according to claim 7, The jungle amount driving step A control method of a refrigerator performed at the cooling of at least one of the refrigerating compartment or the freezing compartment. The method according to claim 7, The control method of the refrigerator when the external temperature of the maximum overload condition is 38 ℃ or more. The method according to claim 7, The control method of the refrigerator when the external temperature of the minimum overload condition is more than 35 ℃ 38 ℃. The method according to any one of claims 7 to 10, A freezer compartment fan disposed in the freezer compartment for circulating air in the freezer compartment, and a refrigerating compartment fan arranged in the refrigerating compartment for circulating air in the refrigerating compartment, In the step of driving the amount of rain, the control method of the refrigerator to drive at least one of the freezer compartment fan or the refrigerating compartment fan at a strong wind speed of the strong / medium / weak wind speed. The method according to any one of claims 7 to 10, A freezer compartment fan disposed in the freezer compartment for circulating air in the freezer compartment, and a refrigerating compartment fan arranged in the refrigerating compartment for circulating air in the refrigerating compartment, In the step of operating the amount of sliding, at least one of the freezer compartment fan or the refrigerating compartment fan variable control according to the load of the freezer compartment or the refrigerating compartment.

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