KR100332291B1 - Refrigerator and the controlling method thereof - Google Patents

Abstract

The present invention relates to a refrigerator and a method of controlling a refrigerator, wherein the amount of the throttle of the refrigerating capillary 70 is less than the amount of the throttle of the refrigerating capillary 72, and the refrigerant passage for cooling the refrigerating compartment is a refrigerating evaporator 50. If there is a leak in the freezing capillary 72 connected to the freezing evaporator 52 when the flow path connected to the evaporator 52 is switched by the three-way valve 68, the freezing capillary 72 is connected to the freezing capillary 70 When the refrigerant is hard to flow toward the freezing capillary 72, the refrigerant flows toward the refrigeration evaporator 50, and even when there is a leak in the valve for switching the refrigerant flow path, the refrigerant is cooled. A refrigerator is provided to allow the entire refrigerant to flow through the refrigerating evaporator, and to allow the entire refrigerant to flow into the freezer compartment when cooling the freezer compartment so that each compartment of the refrigerator and freezer can be individually cooled. And that is characterized.

Description

REFRIGERATOR AND THE CONTROLLING METHOD THEREOF}

The present invention relates to a refrigerator and a method of controlling the refrigerator having a refrigerator evaporator and a refrigerator evaporator.

This type of refrigerator having a refrigerating evaporator for cooling the refrigerating compartment and a plurality of cases at a refrigerating temperature and a refrigerating evaporator for cooling the freezing compartment has a three-way valve in the refrigerant passage to switch the flow passage. One output side of the three-way valve is connected to the refrigerating evaporator through the refrigerating capillary tube, and the other output side is connected to the refrigerating evaporator via the refrigerating capillary tube.

In the three-way valve for switching the refrigerant flow path, it is difficult to completely eliminate leakage due to its structure. Therefore, when the refrigerant flows only in the freezing evaporator by switching the three-way valve, there is a problem that loss occurs in the refrigerating evaporator due to leakage of the three-way valve.

In addition, even when the refrigerant flows through the refrigerating evaporator, the refrigerant flows to the freezing capillary side due to leakage from the three-way valve and does not flow through the refrigerant to the refrigerating evaporator. There was a problem.

Therefore, in view of the above problem, in the present invention, even when there is a leak in the valve for switching the refrigerant flow path, the entire refrigerant flows to the refrigerating evaporator when the refrigerating chamber is cooled, and when the cooling chamber is cooled, the entire refrigerant flows to the freezing chamber. The present invention provides a refrigerator and a method of controlling the refrigerator to individually cool each compartment of the refrigerator and the freezer.

1 is a block diagram also serves as a refrigerant passage of an embodiment of the present invention,

2 is an explanatory diagram showing a control method;

3 is an explanatory diagram showing another control method;

4 is an explanatory diagram showing another control method;

5 is a sectional view of a three-way valve;

6 is an exploded perspective view of a case in which the temperature sensor is attached to the refrigerating capillary;

7 is an explanatory diagram when a temperature sensor is attached to a refrigerating capillary;

8 is a longitudinal sectional view seen from the front of the refrigerator 10 of the present embodiment;

9 is a longitudinal sectional view seen from the side and

10 is a layout view of each device constituting the refrigeration cycle.

* Explanation of symbols for main parts of the drawings

10: refrigerator 14: cold room

22: freezer 46: compressor

50: refrigeration evaporator 52: refrigeration evaporator

54: refrigeration blower 62: condenser

68: 3-way valve 70: refrigeration capillary

72: freezing capillary 122: temperature sensor

124: temperature sensor 130: alarm lamp

The refrigerator of claim 1 of the present invention comprises a refrigerant passage by connecting a compressor, a condenser, a refrigeration throttle mechanism, a refrigeration evaporator corresponding to a plurality of refrigeration chambers, a refrigeration throttle mechanism, and a refrigeration evaporator corresponding to a freezer compartment in a ring shape. In the refrigerator, the refrigerant flow path is switched by the valve mechanism to allow the refrigerant to flow through the refrigeration evaporator and the freezing evaporator through the refrigeration throttle mechanism, or the refrigerant flows only through the refrigeration throttle mechanism to the freezing evaporator. The flow resistance of the refrigeration throttle mechanism was increased with respect to the refrigeration throttle mechanism.

The control method of the refrigerator according to claim 2 includes a compressor, a condenser, a refrigeration throttle mechanism, a refrigeration evaporator corresponding to a plurality of refrigeration chambers, a refrigeration throttle mechanism, and a refrigeration evaporator corresponding to the freezer compartment in a ring shape. In the refrigerator by switching the refrigerant flow path by the valve mechanism and allowing the refrigerant to flow through the refrigeration throttle mechanism through the refrigeration evaporator and the freezing evaporator, or through the refrigeration throttle mechanism to flow the refrigerant only through the refrigeration evaporator. The temperature sensor is arranged at the inlet of the refrigerating evaporator, and the temperature sensor is measured at the inlet of the refrigerating evaporator when the refrigerating chamber is not cooled, and the valve mechanism is placed on the opposite side when the measured temperature does not rise above a certain temperature. It is characterized in that the operation is performed one or more times after the operation of closing the valve mechanism.

The control method of the refrigerator of Claim 3 is a refrigerator of the refrigerator of Claim 2, Comprising: The refrigeration evaporator is equipped with the refrigeration blower, When the refrigeration blower continues to operate for a fixed time after the refrigerating room cooling end, refrigeration after the operation of the refrigeration blower is refrigerated. If the temperature of the inlet of the evaporator drops below the temperature during the operation of the refrigeration blower or if it does not rise above a certain temperature, the valve mechanism is operated on the opposite side for a predetermined time, and then the valve mechanism is closed at least once. It is characterized by that.

The method of controlling a refrigerator according to claim 4, wherein the control method of the refrigerator according to claim 2 measures the temperature of the inlet of the refrigerator evaporator at the time of no cooling of the refrigerator compartment, and if the measured temperature does not rise above a certain temperature, When the refrigeration blower continues to operate, or when the temperature of the inlet portion drops below the temperature during operation of the refrigeration blower after the refrigeration blower has finished operation, or the temperature of the refrigeration evaporator does not rise above a certain temperature. Defrosting is performed by a heater until it rises above a certain temperature or needs to cool a refrigerator compartment.

The control method of the refrigerator of Claim 5 is a thing of Claim 4, Comprising: When a defrost is performed by a heater, a compressor is stopped.

The control method of the refrigerator of Claim 6 WHEREIN: The temperature sensor is provided in Claim 2 so that the temperature of both the inlet part and the outlet part of a refrigerator evaporator can be measured.

The control method of the refrigerator of Claim 7 is a thing of Claim 6 WHEREIN: The member which attaches a temperature sensor is provided so that it may contact with both an inlet part and an outlet part, The temperature sensor is attached to the member.

The method of controlling a refrigerator according to claim 8 includes a compressor, a condenser, a refrigeration throttle mechanism, a refrigeration evaporator corresponding to a plurality of refrigeration chambers, a refrigeration throttle mechanism, and a refrigerating evaporator corresponding to a freezer compartment in a ring shape. In the refrigerator by switching the refrigerant flow path by the valve mechanism and allowing the refrigerant to flow through the refrigeration throttle mechanism through the refrigeration evaporator and the freezing evaporator, or through the refrigeration throttle mechanism to flow the refrigerant only through the refrigeration evaporator. The temperature sensor is arranged at the inlet of the refrigerating evaporator, and when the detection temperature of the temperature sensor does not exceed the reference temperature when the refrigerant flows only in the refrigerating evaporator, the valve mechanism is determined to be abnormal. A state in which the refrigerant is switched to flow and the defrost heater for the refrigeration evaporator is energized. As it is.

The control method of the refrigerator of Claim 9 is the thing of Claim 8 WHEREIN: The cycle which makes a refrigerant | coolant flow alternately to a refrigerating evaporator and a refrigeration evaporator for several cycles, When a defrosting heater is energized, a compressor is stopped and defrosting is carried out. It is characterized in that to execute.

In the refrigerator control method of Claim 10, it is made to notify to an alarm means when it determines with abnormality in a valve mechanism of Claim 8 or Claim 9.

The refrigerator control method according to claim 11 is characterized in that the alarm means is notified when the defrosting heater is energized for several cycles according to claim 8 or 9.

In the method for controlling a refrigerator according to claim 12, in the case of claim 8, a cycle of alternately flowing refrigerant to the refrigerating evaporator and the refrigerating evaporator is continued for several cycles, and when the defrost heater is energized, the compressor is stopped to remove the defrost. In addition, when the detected temperature of the temperature sensor is about 0 ° C or less, it is characterized by the alarm means.

In the refrigerator according to claim 1, since the flow resistance of the refrigeration throttle mechanism is increased with respect to the refrigeration throttle mechanism, even when there is a leak in the valve mechanism, the entire refrigerant can flow to the refrigerating evaporator when the refrigerating chamber is cooled. When cooling, the entire refrigerant can flow in the freezer compartment.

In the control method of the refrigerator of claim 2, the operation of closing the valve mechanism is performed at least once, so that the dust in the valve mechanism can be removed and the valve leakage can be prevented.

In addition, defrosting is performed at the temperature detected by the temperature sensor to prevent problems caused by valve leakage, or when defrosting with a heater, the compressor is stopped to reliably remove defrosting. In addition, by installing a temperature sensor at the inlet and outlet of the refrigerating evaporator, it is possible to detect both the valve leakage and the end of defrosting by measuring the temperature of both the inlet and outlet.

According to the control method of the refrigerator of claim 8, ice is likely to be generated when refrigerant is leaked to the refrigerating evaporator, but the defrosting heater for the refrigerating evaporator is energized to prevent destruction of surrounding parts and the like caused by the ice. Repairs can be prevented beforehand.

In addition, in certain cases, the alarm mechanism is notified to the user that the valve mechanism is abnormal. Therefore, a failure of the valve mechanism can be detected at an early stage to prevent the growth of freezing, and also to notify the user of the failure in order to restore normal function. have.

(1st embodiment)

Embodiments of the present invention will be described below with reference to FIGS. 1 to 10.

First, the whole structure of the refrigerator of this invention is demonstrated based on FIG. 8, FIG. 8 is a longitudinal sectional view seen from the front of the refrigerator 10 of the present embodiment, and FIG. 9 is a longitudinal sectional view seen from the side.

In the cabinet 12, which is the main body of the refrigerator 10, the refrigerating chamber 14, the vegetable chamber 16, the temperature switching chamber 18, and the freezing chamber 22 are provided from the top. In addition, an ice making chamber 20 is provided on the left side of the temperature switching chamber 18. Then, the insulating heat insulating member 24 is disposed between the vegetable chamber 16, the temperature switching chamber 18, and the ice making chamber 20.

The refrigerator compartment 14 is provided with the refrigerator compartment door 14a which opens and closes by a hinge. Moreover, the chilled chamber 26 which maintains the temperature in a case at about 0 degreeC is provided in the lower part of this refrigerator compartment 14.

The vegetable chamber 16 is provided with a pullout type vegetable chamber door 16a, and with this door, the vegetable container 28 can be taken out. The vegetable container 28 is covered with a crisper cover 29.

In the temperature conversion chamber 18, a draw-out type temperature conversion chamber door 18a is provided, and together with this door, the temperature conversion chamber container 30 can be taken out.

The freezer compartment 22 is also provided with a pull-out freezer compartment door 22a, and the freezer container 32 can be taken out with this door.

As shown in FIG. 9, the ice-making chamber 20 is equipped with the ice-making apparatus 34 near the ceiling, and the ice storage container 36 is provided in the lower part.

The ice making apparatus 34 is comprised of the dike plate 38, the drive part 40 which rotates it, and the ice-covering lever 42 which detects the quantity of the ice of the storage container 36. In addition, a tank 44 for supplying water to the ice making plate 38 is provided on the left side of the chilled chamber 26.

Next, the structure of the refrigeration cycle of the refrigerator 10 and its arrangement will be described.

First, as shown in FIG. 9, the compressor 46 is provided in the machine room 48 provided in the bottom part of the cabinet 12, ie, in the lower back part of the freezer compartment 22. As shown in FIG.

The evaporator of the refrigerator 10 includes two types of refrigerators and freezers. The refrigerator evaporator 50 is disposed at the rear of the vegetable chamber 16, and the refrigerator evaporator 52 is installed at the rear upper portion of the freezer chamber 22. It is. A refrigeration blower 54 is provided above the refrigeration evaporator 50, and a refrigeration blower 56 is provided above the refrigeration evaporator 52. In addition, a defrost heater 96 is provided below the refrigeration evaporator 50. Defrost heater 98 is provided below the freezing evaporator 52.

However, the left side wall and the bottom plate of the temperature conversion chamber 18 are made of a heat insulating structure. As a result, even if the temperature in the case of the temperature switching chamber 18 is set to the same temperature as the refrigerating chamber, the temperature influence in the freezing chamber 22 or the like existing in the surroundings is not affected. In addition, since the back plate of the temperature conversion chamber 18 also has a heat insulating structure, the temperature is not affected by the freezing evaporator 52.

Fig. 10 is a block diagram illustrating the arrangement of the refrigeration cycle, and Fig. 1 is a block diagram showing the refrigerant passage. Hereinafter, the flow of the refrigerant will be described based on FIGS. 10 and 1.

The refrigerant from the compressor 46 reaches the three-way valve 68 via the silencer 58, the heat dissipation pipe 60, the condenser 62, the aisle pipe 64, and the dryer 66. In the three-way valve 68, the refrigerant flow passage branches, one toward the refrigeration capillary 70, and the other toward the refrigeration capillary 72. The refrigeration capillary 70 reaches the refrigeration evaporator 50 described above, becomes one with the outlet side of the refrigeration capillary 72, and reaches the refrigeration evaporator 52 described above. Thereafter, it returns to the compressor 46 via the accumulator 74 and the suction pipe 76.

Here, the attachment position in the refrigerator 10 of each apparatus which was not demonstrated above is demonstrated.

As shown in FIG. 10, the condenser 62 is bent several times, and is comprised in plate shape, As shown in FIG. 9, it is arrange | positioned under the bottom part in the freezer compartment 22. As shown in FIG. The accumulator 74 is attached to the right side of the freezing evaporator 52.

Next, the flow of cold air in the refrigerating cycle of the above configuration will be described with reference to FIG. 9 of the refrigerator 10.

First, the flow of cold air cooled by the refrigeration evaporator 50 will be described.

The cold air cooled by the refrigerating evaporator 50 is sent to the refrigerating branch space 78 located at the rear of the vegetable compartment 16 from the front of the refrigerating blower 54. The upper portion of the refrigerating branch space 78 is connected to the refrigerating duct 80 provided on the rear surface of the refrigerating chamber 14, and the cold air is sent to the refrigerating duct 80. As shown in FIG. 8, the refrigeration duct 80 is divided into two at the lower part of the refrigerating chamber 14, and is substantially U-shaped. Cold air ejection openings 82 are provided on the front surface of the refrigerating duct 80 at predetermined intervals, and cold air is sucked into the refrigerating chamber 14 through the air ejection openings 82. The cold air having cooled the refrigerating compartment 14 is returned to the left and right of the refrigerating blower 54 and the refrigerating evaporator 50 through the chilled chamber 26 and the bottom of the tank 44 (see FIG. 9). ), It is ejected to the bottom of the refrigeration evaporator 50. This cold air is again cooled in the refrigeration evaporator 50 and reaches the position of the refrigeration blower 54.

On the other hand, in the refrigerated branching space 78, it blows along the crisper cover 29 of the vegetable compartment 16, and cools the vegetable compartment 16 (refer FIG. 9). This cold air causes the bottom of the vegetable container 28 to flow from front to back, reaches the return opening 88 and circulates to the refrigeration evaporator 50.

Next, the flow of cold air cooled by the freezing evaporator 52 will be described.

The cold air cooled by the freezing evaporator 52 reaches the freezing branch space 90 by the freezing blower 56. The upper portion of the freezing branch space 90 passes through the ice making device 34, and the cold air is blown out to the dike device 34 from the upper portion. The lower part of the freezing branch space 90 communicates with the hole 33 opening in the back plate of the freezing chamber 32 of the freezing chamber 22 and the upper surface of the freezing container 32. In the freezing container 23 is ejected toward the inside.

The cold air cooling the ice making chamber 20 flows to the front surface of the freezing chamber 22, and the cold air cooling the inside of the freezing chamber 32 of the freezing chamber 22 flows to the front surface of the freezing chamber 22. The cold air then flows downward along the front surface of the freezing vessel 32 and reaches the return duct 92 through the bottom portion. The cold air flowing into the return duct 92 circulates to the freezing evaporator 52.

As shown in FIG. 5, a damper device 94 is provided on the right side of the refrigeration branch space 90 for sending cold air to the temperature switching chamber 18. The temperature switching chamber 18 is opened by opening and closing the damper of the damper device 94. Adjust the amount of cold air sent to), and adjust the temperature in the case. The cold air which cooled the temperature conversion chamber 18 flows into the return duct 95 which communicates with the refrigeration evaporator 52 in the bottom part of the temperature conversion chamber 18, and circulates to the freezing evaporator 52. As shown in FIG.

Fig. 5 shows a cross-sectional view of the three-way valve 68, and has a so-called solenoid structure composed of a coil 102, a magnet 104, a plunger 106 and the like. A pin 108 is provided at the bottom of the plunger 106, the coil 102 is excited to drive the pin 108 downward, and to drive the valve body 110 downward against the spring 112. consist of. In this state, the refrigerant flows from the dryer side to the refrigeration evaporator (R evaporator). In addition, when the plunger 106 returns, the valve body 11 returns upward and the refrigerant flows from the dryer side toward the freezing evaporator (F evaporator). In the figure, 116 is a valve seat for refrigeration, and 118 is a valve seat for refrigeration.

In the related three-way valve 68 for switching the refrigerant flow path, since some dust is caught between the valve body 110 and the valve seats 116 and 118 due to its structure and the refrigeration cycle, a certain amount of leakage It exists.

Therefore, in this embodiment, a difference is provided between the refrigerating capillary tube 70 formed in the refrigerant passage shown in FIG. 1 and the throttle amount of the refrigerant in the refrigerating capillary tube 72.

That is, the amount of throttle of the refrigerating capillary 70 following the refrigerating evaporator 50 is less than the amount of throttle of the refrigerating capillary 72 subsequent to the refrigerating evaporator 52. In this case, it is possible to allow the refrigerant to flow through the refrigerating evaporator 50 and the freezing chamber 22 when cooling the freezing chamber 22.

For example, the freezing capillary tube 72 connected to the freezing evaporator 52 when the refrigerant flow path is switched by the three-way valve 68 to the flow path connecting the cooling evaporator 50 to cool the refrigerating chamber 14. If there is leakage on the side, since the freezing capillary tube 72 is tighter than the throttle amount of the freezing capillary tube 70, the refrigerant hardly flows to the freezing capillary tube 72, and the coolant toward the refrigerating evaporator 50 side. Will flow.

On the contrary, when the refrigerant flow path is switched by the three-way valve 68 to the flow path connecting the freezing evaporator 52 to cool the freezing chamber 22, the leakage flows into the refrigerating capillary 70 following the refrigerating evaporator 50. In this case, since the amount of the throttle of the refrigerating capillary 70 is less than the amount of the throttle of the refrigerating capillary 72, the refrigerant flows to the refrigerating evaporator 50, but the refrigerating blower 54 is stopped. The refrigerant does not heat exchange in the refrigerating evaporator 50, but joins with the refrigerant via the refrigerating capillary 72 directly connected to the freezing chamber 22, and performs evaporation and heat exchange in the refrigerating evaporator 52.

Thus, in this embodiment, even when there is a leakage in the three-way valve 68, most of the refrigerant can flow to the refrigerator evaporator 50 at the time of cooling the refrigerator, and to the refrigerator evaporator 52 at the time of freezing chamber cooling. Each compartment of refrigeration and freezing can be cooled individually, and generation | occurrence | production of a loss can be prevented.

(Second embodiment)

As described in the previous embodiment (see FIG. 1), the refrigerant flowing through the freezing evaporator 52 may flow through both the refrigeration capillary 70 and the freezing capillary 72. There is this. At this time, the refrigerant flowing through the freezing evaporator 52 passes through two capillaries 70 and 72 and is relatively throttled compared to the case where only the freezing capillary 72 flows into the freezing evaporator 52. This is alleviated, and the amount of leakage may increase the refrigerant evaporation temperature.

In this case, the fact that the temperature of the refrigerating evaporator 50 is inherently cooled can be detected by lowering the temperature to about 0 ° C or more. As one of the possible leaks in the three-way valve 68, when the valve body 110 is moved and pressed down on the valve seats 116 and 118, dust during the refrigerating cycle is sandwiched between the valve body 110 and the valve seat. The case where a space | interval arises between 116 and 118 can be considered.

In this case, the valve body 110 is opened for a predetermined time, for example, 10 seconds, the refrigerant flows between the valve body 110 and the valve seats 116 and 118, and the dust flows, and then the valve body ( The adhesiveness can be improved by moving 110 and pressing down on valve seat 116,118. This control is executed by the control unit 120 shown in FIG. In addition, this operation may be repeated several times (2 to 3 times).

(Third embodiment)

By the way, when the refrigeration blower 54 is continuously operated for a predetermined time (for example, 5 minutes) when the refrigerating chamber is switched to the non-cooling state from the refrigerating chamber, the refrigerating evaporator 50 is the air in the case of the refrigerating chamber 14. It heated by and raises to 0 degreeC vicinity.

However, when there is a leak in the refrigerating capillary 70 side following the refrigerating evaporator 50, when the refrigerating blower 54 stops, the temperature of the refrigerating evaporator 50 falls. In such a case, valve leakage is eliminated by moving the valve body 110 as in the first embodiment.

(Example 4)

When valve leakage is detected in the refrigerating evaporator 50 as in the second and third embodiments described above, there is a possibility that frost attached to the refrigerating evaporator 50 cannot be absorbed. In such a case, the defrosting heater 96 of the refrigeration evaporator 50 is energized, and defrosting is performed by the controller 120 until the evaporator temperature rises to a predetermined temperature (for example, 12 ° C). have.

(Example 5)

In the fourth embodiment, when defrosting of the refrigerating evaporator 50 is performed, defrosting is performed after the compressor 46 is stopped in order to reliably remove the defrosting.

(Example 6)

Next, a sixth embodiment will be described. In general, when defrosting is performed, since the rise of the outlet temperature of the refrigeration evaporator 50 is slow, it is necessary to measure the temperature in order to detect the end of defrosting. Thus, the temperature sensors 122 and 124 are installed as shown in FIG. 1 so that the temperature of both the inlet and the outlet pipes of the refrigerating evaporator 50 can be measured. By the output of these temperature sensors 122 and 124, both the valve leakage detection and the defrosting weight can be detected.

(Example 7)

In the seventh embodiment, a member connecting the inlet pipe and the outlet pipe of the refrigerating evaporator 50 is attached, and the temperature sensor is attached to the member to measure the onion pipe temperature of the inlet pipe and the outlet pipe.

(Example 8)

However, the valve leakage is not particularly technically addressed as a system in the refrigerator. However, in the design stage of the valve (three-way valve 68) itself, the valve leakage is suppressed at a failure rate equivalent to that of the compressor 46, which is a main component of the refrigerator. Reliability tests are also carried out, and as a major component of a refrigerator with a long product life, it has a structure that can withstand it sufficiently.

However, when the three-way valve 68 breaks down and the refrigerant flows in the refrigerating evaporator 50, freezing occurs at the inlet of the refrigerating evaporator 50, and when it grows, there is a risk of destroying the surrounding components and the like. In addition, many parts need to be replaced at the time of repair because it cannot be detected until a malfunction occurs.

Therefore, the following embodiment demonstrates the embodiment which performs early detection of a valve failure.

As shown in FIG. 1, when the refrigerant flows through the freezing evaporator 52, the refrigerant does not flow through the refrigeration evaporator 50, and the refrigeration blower 54 is operated to bring the refrigeration evaporator 50 to a positive temperature. In addition, natural elimination becomes possible.

However, if the refrigerant leaks into the refrigerating evaporator 50 due to some cause, the inlet of the refrigerating evaporator 50 becomes cold, surrounding water vapor gathers into ice, and ice is generated at the inlet of the refrigerating evaporator 50. do. This ice grows and eventually destroys the surrounding parts and inner casing. If you get here, it will cost you a lot of time and money to repair.

Thus, the temperature sensor 122 as the defrost sensor attached to the inlet of the refrigerating evaporator 50 detects the temperature of the inlet of the refrigerating evaporator 50, and uses the output of the temperature sensor 122 for refrigeration. Defrosting of the evaporator 50 is performed.

6 and 7 illustrate a method of attaching the temperature sensor 122, in which the temperature sensor 122 is brought into close contact with the fixing mechanism 126 made of aluminum or copper having a substantially U-shaped cross section. It is press-fitted and fixed. One end portion of the fixing mechanism 126 is integrally formed with a fastening portion 128 along the longitudinal direction, and the refrigeration capillary 70 is wound around the fastening portion 128 to fix the temperature sensor through the fixing mechanism 126. 122 is attached to the refrigeration capillary 70 side.

In addition, the temperature sensor 122 may be fixed to the refrigerating capillary 70 together with aluminum tape.

Here, the temperature of the inlet portion of the refrigerating evaporator 50 is monitored by the temperature sensor 122 from the time when the refrigerant begins to flow in the freezing evaporator 52, and if the detected temperature is not higher than 0 ° C, for example, in three directions It is determined that the valve 68 is broken. As illustrated in FIG. 1, the control unit 120 lights or flashes the alarm lamp 130 to notify the user. This state is shown in FIG. In FIG. 2, point A is a time point at which the alarm lamp 130 is notified.

(Example 9)

In the ninth embodiment, in the eighth embodiment, after determining that the three-way valve 68 is broken, the defrost heater (at point B in FIG. 2) is switched to allow the refrigerant to flow through the freezing evaporator 52. 96 is supplied to prevent freezing of the inlet portion of the refrigeration evaporator 50.

The defrost heater 96 is configured to stop the energization when the flow of the refrigerant is switched to the refrigeration evaporator 50 and when the compressor 46 is in one of the stop states.

(Example 10)

In the ninth embodiment of the present invention, a cycle in which the refrigerant flows alternately to the refrigerating evaporator 50 and the refrigerating evaporator 52 continues the cycle as shown in FIG. 3 and the defrost heater 96 is energized. In this case, it is judged that freezing cannot be grown and melted, and when switching to the next refrigeration evaporator 50 (point A in Fig. 3), the compressor 46 is forcibly stopped, and the defrosting heater 96 is defrosted. You are about to run the uninstall.

In this case, the alarm lamp 130 is also notified.

(Eleventh embodiment)

In the eleventh embodiment, in the tenth embodiment, after the compressor 46 is stopped and defrosting is performed, the detection temperature of the temperature sensor 122 does not become 0 ° C or more during the cooling of the next freezing evaporator 52. If not (A point in Fig. 4), the alarm lamp 130 is notified.

In addition, the alarm lamp 130 is provided with a light emitting diode (LED) in the temperature control dials provided in the front of the door of the refrigerator and in the case, so that it lights or flashes. In the case of a refrigerator without an LED, a buzzer or the like may be sounded when the door is opened to inform the user of the abnormality by voice.

In the above-described refrigerator according to the present invention, the refrigerant flows into the throttle of the refrigerant flow path following the three-way valve, so that even when there is a valve leakage, the entire refrigerant flows to the refrigerating evaporator when cooling the refrigerating chamber, and when the cooling chamber is cooled, When the coolant flows and the coolant is to be cooled, it is possible to bypass the refrigerating compartment and prevent generation of loss in which the coolant flows to the freezing evaporator. As a result, the refrigerant can flow through the refrigerator evaporator when the refrigerator is cooled, and the refrigerant can flow through the refrigerator evaporator when the refrigerator is cooled, so that each compartment of the refrigerator and the freezer can be reliably cooled individually.

In addition, when the refrigerant flows to the refrigerating evaporator when the refrigerating chamber is not cooled, the valve may be opened or closed, and when frost is generated, defrosting by a heater may be performed to prevent problems associated with frost formation. .

In addition, by early detection of a failure of the three-way valve by the temperature sensor, it is possible to notify the user of a failure in order to prevent the growth of freezing and to restore the normal function, so that a malfunction occurs as in the prior art. It was not found until afterwards, and many parts were replaced at the time of repair.

Claims (12)

A refrigerant flow path is formed by connecting a compressor, a condenser, a refrigeration throttle mechanism, a refrigeration evaporator corresponding to a plurality of refrigeration chambers, a refrigeration throttle mechanism, and a refrigeration evaporator for a freezing temperature zone corresponding to a freezer compartment in a ring shape. A refrigerator in which a refrigerant flow path is switched by a valve mechanism to allow refrigerant to flow through a refrigeration throttle mechanism through a refrigeration evaporator and a refrigeration evaporator, or a refrigerant to flow only through the refrigeration throttle mechanism to a refrigeration evaporator. A refrigerator comprising a refrigeration throttle mechanism having a larger flow resistance than a refrigeration throttle mechanism. A compressor flow path is constructed by connecting a compressor, a condenser, a refrigeration throttle mechanism, a refrigeration evaporator corresponding to a plurality of refrigeration chambers, a refrigeration throttle mechanism, and a refrigeration evaporator corresponding to a freezer compartment in a ring shape. In a refrigerator in which the refrigerant flow path is switched by a valve mechanism to allow refrigerant to flow through the refrigeration throttle mechanism through the refrigeration evaporator and the freezing evaporator, or the refrigerant flows only through the refrigeration throttle mechanism to the refrigeration evaporator. Place the temperature sensor at the inlet of the refrigeration evaporator, Measure the temperature of the inlet of the refrigerating evaporator with a temperature sensor when the refrigerating chamber is not cooled, If the measured temperature does not rise above a certain temperature, operate the valve mechanism on the opposite side, And controlling the closing of the valve mechanism one or more times thereafter. The method of claim 2, The refrigeration evaporator is equipped with a refrigeration blower, If the refrigeration blower continues to run for a certain time after cooling When the temperature of the inlet of the refrigerating evaporator is lower than the temperature during the operation of the refrigerating blower after the end of the refrigeration blower operation or does not rise above a certain temperature, Operate the valve mechanism on the opposite side for a certain time, And controlling the closing of the valve mechanism one or more times thereafter. The method of claim 2, Measure the temperature of the inlet of the refrigerating evaporator at the time of refrigeration without cooling, If the measured temperature does not rise above a certain temperature, In addition, if the refrigeration blower continues to run for a certain period of time after the refrigerating chamber has finished cooling, Or when the temperature of the inlet portion has fallen below the temperature during operation of the refrigeration blower after the end of the refrigeration blower operation or does not rise above a certain temperature. A control method of a refrigerator, characterized in that defrosting is performed by a heater until the temperature of the refrigerating evaporator rises above a predetermined temperature or the need to cool the refrigerating chamber. The method of claim 4, wherein The control method of the refrigerator, characterized in that the compressor is stopped when defrosting with a heater. The method of claim 2, A control method of a refrigerator, characterized in that a temperature sensor is installed to measure the temperature of both the inlet and outlet of the refrigeration evaporator. The method of claim 6, A member attaching the temperature sensor is installed to contact both the inlet and outlet, A control method for a refrigerator, characterized in that a temperature sensor is attached to the member. A refrigerant flow path is formed by connecting a compressor, a condenser, a refrigeration throttle mechanism, a refrigeration evaporator for a refrigeration temperature and a refrigeration throttle mechanism for a plurality of refrigeration chambers, and a freezing evaporator corresponding to a freezer compartment in a ring shape. In a refrigerator in which the refrigerant flow path is switched by a valve mechanism to allow refrigerant to flow through the refrigeration throttle mechanism through the refrigeration evaporator and the freezing evaporator, or the refrigerant flows only through the refrigeration throttle mechanism to the refrigeration evaporator. Place the temperature sensor at the inlet of the refrigeration evaporator, If the detected temperature of the temperature sensor does not exceed the reference temperature when the refrigerant flows only in the freezing evaporator, it is determined that the valve mechanism is abnormal. A control method for a refrigerator comprising switching to a state in which a refrigerant flows only in a freezing evaporator and energizing a defrosting heater for a refrigeration evaporator. The method of claim 8, A refrigeration evaporator and a refrigeration evaporator in which the refrigerant flows alternately for several cycles, when the defrosting heater is energized, the compressor is stopped by defrosting control method characterized in that to perform defrosting. The method according to claim 8 or 9, The control method of the refrigerator characterized by notifying to an alarm means when a valve mechanism determines that it is abnormal. The method according to claim 8 or 9, The control method of the refrigerator, characterized in that to notify the alarm means when the defrosting heater is energized for several cycles. The method of claim 8, If the defrost heater is energized for several cycles, the refrigerant is flowed alternately to the refrigerating evaporator and the refrigerating evaporator. The control method of the refrigerator, characterized in that to notify the alarm means when the detected temperature of the temperature sensor is about 0 ℃ or less.