JP2005337677A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the efficiency in cooling in a refrigerator having evaporators respectively in a refrigeration chamber and a freezing chamber. <P>SOLUTION: A vacuum heat insulating material 20 is used as a hating insulating material of a heat insulating casing, the refrigerant flow is switched to a refrigeration chamber/freezing chamber circuit, and a freezing chamber circuit by a three-way valve 3 to alternately cool the refrigeration chamber and the freezing chamber 10, a compressor 1 is stopped and the three-way valve 3 is fully closed when it is detected that both of a temperature of the refrigeration chamber 9 and a temperature of the freezing chamber 1 are lower than set temperatures, and the fully-close state is continued to the next start of the compressor, thus the temperature rise of each chamber can be minimized as the refrigerant of high temperature and high pressure does not flow into the evaporators of the refrigeration chamber 9 and the freezing chamber 10. In particular, the heat absorbing quantity is reduced as the vacuum heat insulating material 20 is used in the heat insulating casing, and the effect is further increased when a stop time of the compressor 1 is elongated in comparison with a conventional case when the vacuum heat insulating material is not used. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a refrigerator having an evaporator in each of a refrigerator compartment and a freezer compartment.

In recent years, some refrigerators have evaporators in a refrigerator compartment and a freezer compartment, respectively. (For example, see Patent Document 1)
FIG. 13 shows a schematic diagram of a conventional cooling cycle and a refrigerator.

  1 is a compressor, 2 is a condenser, 3 is a switching valve disposed in the machine room 11, 5 is a refrigerating room evaporator disposed in the refrigerating room 9, and 7 is a freezing room 10. It is the evaporator for freezers arranged in the inside.

  The first capillary 4 is disposed on the upstream side of the refrigerating room evaporator 5 for cooling the refrigerating room, and the second capillary 6 is disposed on the upstream side of the refrigerating room evaporator 7 for cooling the freezing room. The check valve 8 is provided downstream of the freezer compartment evaporator 7.

  About the conventional refrigerator comprised as mentioned above, the operation | movement is demonstrated below.

  In a state where the compressor 1 is driven and the refrigerant flow path is switched by the switching valve 3 so that the refrigerant discharged from the compressor 1 flows to the refrigerator 5 evaporator side, the compressor 1 is compressed. The refrigerated refrigerant is sent to the condenser 2 as a high-temperature and high-pressure gas, where it dissipates heat and becomes liquefied. The liquefied refrigerant passes through the first capillary 4 by the switching valve 3 and is sent to the refrigerating room evaporator 5 where it takes away ambient heat as it evaporates, thereby cooling the surrounding air. The gasified refrigerant is compressed again in the compressor 1.

  At this time, the cold air cooled by the refrigerator 5 for the refrigerator compartment is supplied to the refrigerator compartment 9 by the blowing action of the fan 11 for the refrigerator compartment, and the inside of the refrigerator is cooled. In this case, since the temperature of the refrigerator compartment 9 is, for example, + 2 ° C., the operation frequency of the compressor 1 is set so that the cooling temperature by the evaporator 5 for refrigerator compartment is about −5 ° C. Moreover, the pressure of the evaporator 5 for refrigerator compartments at this time is about 0.24 MPa, for example. Such a cooling state is called a refrigerator compartment cooling mode.

  In the state where the compressor 1 is driven and the refrigerant flow path is switched by the switching valve 3 so that the refrigerant discharged from the compressor 1 flows to the freezer compartment evaporator 7 side. The compressed refrigerant is sent to the condenser 2 as high-temperature and high-pressure gas, and the liquefied refrigerant is sent to the freezer compartment evaporator 7 through the second capillary 6 by the switching valve 3, where it evaporates. As a result, the surrounding heat is taken away, and as a result, the surrounding air is cooled. The gasified refrigerant passes through the check valve 8 and is compressed again in the compressor 1.

  At this time, the cold air cooled by the freezer compartment evaporator 7 is supplied to the freezer compartment 10 by the blowing action of the freezer compartment fan 12 to cool the inside of the refrigerator. In this case, since the temperature of the freezer compartment 10 is, for example, −18 ° C., the operating frequency of the compressor 1 is set so that the cooling temperature by the freezer evaporator 7 is about −28 ° C. Moreover, the pressure of the freezer compartment evaporator 7 at this time is, for example, about 0.09 MPa. Such a cooling state is called a freezer compartment cooling mode.

  In this refrigerator, the refrigerator compartment 9 and the freezer compartment 10 are each provided with a temperature sensor (not shown), and detection signals of the respective temperature sensors are input to a control circuit provided with a microcomputer. The control circuit controls the compressor 1, the switching valve 3, the refrigerator compartment fan-like fan 11, the freezer compartment fan 12, and the like according to the detection signals and a control program provided in advance.

When the compressor 1 is stopped in a state where both the refrigerator compartment 9 and the freezer compartment 10 are cooled to a preset temperature, the cooling compartment cooling mode is performed. In the refrigerating room cooling mode, the switching valve 3 is in a state where the compressor 1 and the inlet of the refrigerating room evaporator 5 are in communication with each other. Blocked. When the compressor 1 is stopped in this state, the high-temperature refrigerant from the high-pressure side does not flow into the freezer compartment evaporator 7 and, on the outlet side of the freezer compartment evaporator 7 due to the pressure difference. Since the check valve 8 is activated, there is no reverse flow of refrigerant from the refrigerator for the refrigerator compartment 5 to the evaporator for the freezer compartment 7. Therefore, a low-temperature refrigerant is held in the freezer compartment evaporator 7, and an increase in the temperature of the freezer compartment evaporator 7 can be suppressed. When the compressor 1 is restarted, the freezer cooling mode is started. At this time, the low-temperature refrigerant held in the freezer evaporator 7 is recirculated. it can.
JP 2001-91130 A

  However, since the conventional configuration stops the compressor 1 in the cold room cooling mode, the compressor 1 and the inlet of the freezer evaporator 7 are disconnected, so that the temperature of the freezer evaporator 7 rises. However, since the compressor 1 and the inlet of the refrigerating room evaporator 5 are in communication with each other, high-temperature refrigerant enters the refrigerating room evaporator 5 from the high pressure side. There was a drawback that the temperature rise of the refrigerator compartment 9 accompanying the rise of the temperature of the evaporator 5 for the refrigerator compartment was large. In addition, since the compressor 1 is always stopped in the refrigerator compartment cooling mode, the refrigerator compartment is always cooled even in a situation where the load is biased toward the refrigerator compartment 10 under actual use conditions such as when only the freezer compartment 10 is opened or closed. The temperature control of the refrigerator compartment 9 depends on the freezer compartment 10 and cannot be flexibly handled.

  An object of the present invention is to solve the conventional problems and to minimize the temperature increase in the refrigerator compartment and the freezer compartment while the compressor is stopped, and to improve the efficiency during cooling.

  In order to solve the above problems, a refrigerator according to the present invention includes a compressor, a condenser, a three-way valve that is a flow path switching unit, a first capillary, an evaporator for a refrigerator compartment, a second capillary, In a refrigerator having a freezer compartment evaporator, a refrigerator compartment fan, and a refrigerator compartment and a freezer compartment fan, a vacuum insulation material is used as the insulation material of the heat insulation box constituting the refrigerator. The refrigerating room evaporator is arranged in the refrigerating room, the freezing room evaporator is arranged in series in the freezing room, and the refrigerant flow is switched between the refrigerating room / freezing room circuit and the freezing room circuit by the three-way valve. The refrigerator compartment / freezer compartment and the freezer compartment are alternately cooled, and when both the temperature of the refrigerator compartment and the temperature of the freezer compartment are detected below the set temperature, the compressor is stopped and the three-way valve is fully closed. The fully closed state continues until the next start of the compressor. , And the high-temperature high-pressure refrigerant in the compressor is stopped it is possible to suppress the refrigerating compartment, it does not flow into the evaporator both of the respective freezer compartment temperature rise of each room to a minimum. In particular, the use of a vacuum heat insulating material for the heat insulating box reduces the amount of heat absorption, and the effect can be further enhanced when the compressor stop time is longer than that using a conventional vacuum heat insulating material.

  In addition, since the refrigerant is held on the condenser side while the compressor is stopped, the refrigerant can be quickly supplied to each evaporator regardless of whether the next cooling is cooling in the refrigerator or freezer, improving the cooling efficiency. It becomes possible to do.

  Also, a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, and a fan for refrigerator compartment A refrigerator having a freezer compartment fan and a freezer compartment, wherein a vacuum insulation material is used as a heat insulation material of the heat insulation box constituting the refrigerator, and the refrigerator for the refrigerator compartment is used in the refrigerator compartment The freezer compartment evaporator is disposed in series in the freezer compartment, and the three-way valve switches the refrigerant flow to a refrigerator compartment / freezer compartment circuit and a freezer compartment circuit, thereby the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both detected to be lower than a set temperature, the compressor is stopped and the three-way valve is opened to the evaporator side of the refrigerator compartment. , The three-way valve to the evaporator side circuit for the refrigerator compartment at the same time the compressor is stopped Since the enables flexible response even in practical conditions of use rather than dependency and cooling state just before stopping.

  In addition, since the pressure on the high-pressure side and the low-pressure side are balanced to the same pressure through the evaporator circuit for the refrigerator when starting the compressor, the torque applied to the compressor at the start-up can be minimized. It becomes possible to prevent starting failure due to insufficient torque.

  Also, a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, and a fan for refrigerator compartment A refrigerator having a freezer compartment fan and a freezer compartment, wherein a vacuum insulation material is used as a heat insulation material of the heat insulation box constituting the refrigerator, and the refrigerator for the refrigerator compartment is used in the refrigerator compartment The freezer compartment evaporator is disposed in series in the freezer compartment, and the three-way valve switches the refrigerant flow to a refrigerator compartment / freezer compartment circuit and a freezer compartment circuit, thereby the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both detected to be equal to or lower than a set temperature, the compressor is stopped and the three-way valve is fully closed. When detecting a temperature above a set temperature, the three-way valve is connected to the evaporator for the refrigerator compartment. When the compressor is stopped, the high-temperature and high-pressure refrigerant does not flow into both the refrigerator compartment and the freezer compartment, so the temperature rise in each room is minimized. It becomes possible to suppress. In addition, since the pressure on the high-pressure side and the low-pressure side are balanced to the same pressure through the evaporator circuit for the refrigerator when starting the compressor, the torque applied to the compressor at the start-up can be minimized. It is possible to prevent a start-up failure due to insufficient torque, and to suppress the temperature rise in the refrigerator compartment to a minimum.

  Also, a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, and a fan for refrigerator compartment A refrigerator having a freezer compartment fan and a freezer compartment, wherein a vacuum insulation material is used as a heat insulation material of the heat insulation box constituting the refrigerator, and the refrigerator for the refrigerator compartment is used in the refrigerator compartment The freezer compartment evaporator is disposed in series in the freezer compartment, and the three-way valve switches the refrigerant flow to a refrigerator compartment / freezer compartment circuit and a freezer compartment circuit, thereby the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both detected to be equal to or lower than a set temperature, the compressor is stopped and the three-way valve is fully closed. When detecting a temperature above a set temperature, the three-way valve is connected to the freezer evaporator. When the compressor is stopped, the high-temperature and high-pressure refrigerant does not flow into both the refrigerator compartment and the freezer compartment, so the temperature rise in each room is minimized. It becomes possible to suppress. Also, since the pressure on the high-pressure side and the low-pressure side are balanced to the same pressure through the freezer compartment evaporator circuit when starting up the compressor, the torque applied to the compressor at startup can be minimized. It is possible to prevent a start-up failure due to insufficient torque, and to suppress the temperature rise in the refrigerator compartment to a minimum. Moreover, since the high-temperature and high-pressure refrigerant does not flow into the refrigerator compartment evaporator, the temperature rise in the refrigerator compartment can be minimized. In a system in which the refrigerator compartment evaporator and the refrigerator compartment evaporator are in parallel, if the three-way valve is opened on the refrigerator compartment evaporator side, the temperature rises only in the refrigerator compartment, but in the series system, the refrigerant that has passed through the refrigerator compartment evaporator Since it flows into the freezer compartment evaporator, the temperature of both the refrigerator compartment and the freezer compartment rises.

  Also, a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, and a fan for refrigerator compartment A refrigerator having a freezer compartment fan and a freezer compartment, wherein a vacuum insulation material is used as a heat insulation material of the heat insulation box constituting the refrigerator, and the refrigerator for the refrigerator compartment is used in the refrigerator compartment The freezer compartment evaporator is disposed in series in the freezer compartment, and the three-way valve switches the refrigerant flow to a refrigerator compartment / freezer compartment circuit and a freezer compartment circuit, thereby the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both detected to be equal to or lower than a set temperature, the compressor is stopped and the three-way valve is fully closed. When detecting the set temperature or higher, the three-way valve is fully closed, It activates the compressor, which is operated a predetermined time, without flowing the high-temperature high-pressure refrigerant of the compressor startup, can transition to the cooling of the refrigerating compartment or the freezer compartment.

  According to the refrigerator of the present invention, the compressor, the condenser, the three-way valve as the flow path switching means, the first capillary, the refrigerator for the refrigerator compartment, the second capillary, and the evaporator for the freezer compartment And a refrigerator having a refrigerator compartment and a refrigerator compartment, and a refrigerator compartment, wherein a vacuum insulation material is used as the insulation material of the insulation box constituting the refrigerator. The freezer compartment evaporator is arranged in series with the freezer compartment evaporator, and the three-way valve switches the flow of the refrigerant between the freezer compartment circuit and the freezer compartment circuit, thereby the refrigerator compartment / The freezer compartment and the freezer compartment are alternately cooled, and when both the temperature of the refrigerator compartment and the temperature of the freezer compartment are detected to be lower than a set temperature, the compressor is stopped and the three-way valve is fully closed. It continues until the next start of the compressor. It is possible to minimize the high-temperature high-pressure refrigerant refrigerating chamber and does not flow into the evaporator both of the freezing chamber, respectively an increase in the temperature of each room in the. In particular, the use of a vacuum heat insulating material for the heat insulating box reduces the amount of heat absorption, and the effect can be further enhanced when the compressor stop time is longer than that using a conventional vacuum heat insulating material.

  In addition, since the refrigerant is held on the condenser side while the compressor is stopped, the refrigerant can be quickly supplied to each evaporator regardless of whether the next cooling is cooling in the refrigerator or freezer, improving the cooling efficiency. It becomes possible to do.

  Also, a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, and a fan for refrigerator compartment A refrigerator having a freezer compartment fan and a freezer compartment, wherein a vacuum insulation material is used as a heat insulation material of the heat insulation box constituting the refrigerator, and the refrigerator for the refrigerator compartment is used in the refrigerator compartment The freezer compartment evaporator is disposed in series in the freezer compartment, and the three-way valve switches the refrigerant flow to a refrigerator compartment / freezer compartment circuit and a freezer compartment circuit, thereby the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both detected to be lower than a set temperature, the compressor is stopped and the three-way valve is opened to the evaporator side of the refrigerator compartment. , The three-way valve to the evaporator side circuit for the refrigerator compartment at the same time the compressor is stopped Since the enables flexible response even in practical conditions of use rather than dependency and cooling state just before stopping.

  In addition, since the pressure on the high-pressure side and the low-pressure side are balanced to the same pressure through the evaporator circuit for the refrigerator when starting the compressor, the torque applied to the compressor at the start-up can be minimized. It becomes possible to prevent starting failure due to insufficient torque.

  Also, a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, and a fan for refrigerator compartment A refrigerator having a freezer compartment fan and a freezer compartment, wherein a vacuum insulation material is used as a heat insulation material of the heat insulation box constituting the refrigerator, and the refrigerator for the refrigerator compartment is used in the refrigerator compartment The freezer compartment evaporator is disposed in series in the freezer compartment, and the three-way valve switches the refrigerant flow to a refrigerator compartment / freezer compartment circuit and a freezer compartment circuit, thereby the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both detected to be equal to or lower than a set temperature, the compressor is stopped and the three-way valve is fully closed. When detecting a temperature above a set temperature, the three-way valve is connected to the evaporator for the refrigerator compartment. When the compressor is stopped, the high-temperature and high-pressure refrigerant does not flow into both the refrigerator compartment and the freezer compartment, so the temperature rise in each room is minimized. It becomes possible to suppress. In addition, since the pressure on the high-pressure side and the low-pressure side are balanced to the same pressure through the evaporator circuit for the refrigerator when starting the compressor, the torque applied to the compressor at the start-up can be minimized. It is possible to prevent a start-up failure due to insufficient torque, and to suppress the temperature rise in the refrigerator compartment to a minimum.

  Also, a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, and a fan for refrigerator compartment A refrigerator having a freezer compartment fan and a freezer compartment, wherein a vacuum insulation material is used as a heat insulation material of the heat insulation box constituting the refrigerator, and the refrigerator for the refrigerator compartment is used in the refrigerator compartment The freezer compartment evaporator is disposed in series in the freezer compartment, and the three-way valve switches the refrigerant flow to a refrigerator compartment / freezer compartment circuit and a freezer compartment circuit, thereby the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both detected to be equal to or lower than a set temperature, the compressor is stopped and the three-way valve is fully closed. When detecting a temperature above a set temperature, the three-way valve is connected to the freezer evaporator. When the compressor is stopped, the high-temperature and high-pressure refrigerant does not flow into both the refrigerator compartment and the freezer compartment, so the temperature rise in each room is minimized. It becomes possible to suppress. Also, since the pressure on the high-pressure side and the low-pressure side are balanced to the same pressure through the freezer compartment evaporator circuit when starting up the compressor, the torque applied to the compressor at startup can be minimized. It is possible to prevent a start-up failure due to insufficient torque, and to suppress the temperature rise in the refrigerator compartment to a minimum. Moreover, since the high-temperature and high-pressure refrigerant does not flow into the refrigerator compartment evaporator, the temperature rise in the refrigerator compartment can be minimized. In a system in which the refrigerator compartment evaporator and the refrigerator compartment evaporator are in parallel, if the three-way valve is opened on the refrigerator compartment evaporator side, the temperature rises only in the refrigerator compartment, but in the series system, the refrigerant that has passed through the refrigerator compartment evaporator Since it flows into the freezer compartment evaporator, the temperature of both the refrigerator compartment and the freezer compartment rises.

  Also, a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, and a fan for refrigerator compartment A refrigerator having a freezer compartment fan and a freezer compartment, wherein a vacuum insulation material is used as a heat insulation material of the heat insulation box constituting the refrigerator, and the refrigerator for the refrigerator compartment is used in the refrigerator compartment The freezer compartment evaporator is disposed in series in the freezer compartment, and the three-way valve switches the refrigerant flow to a refrigerator compartment / freezer compartment circuit and a freezer compartment circuit, thereby the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both detected to be equal to or lower than a set temperature, the compressor is stopped and the three-way valve is fully closed. When detecting the set temperature or higher, the three-way valve is fully closed, It activates the compressor, which is operated a predetermined time, without flowing the high-temperature high-pressure refrigerant of the compressor startup, can transition to the cooling of the refrigerating compartment or the freezer compartment.

  The invention of the refrigerator according to claim 1 includes a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, an evaporator for a refrigerator compartment, a second capillary, and a freezer compartment. In the refrigerator having the refrigerator, the refrigerator for the refrigerator, the refrigerator for the refrigerator, and the refrigerator for freezer, a vacuum insulator is used for the insulator of the heat insulating box constituting the refrigerator, The refrigerating room evaporator is arranged in the refrigerating room, the freezing room evaporator is arranged in series in the freezing room, and the flow of the refrigerant is switched between the refrigerating room / freezing room circuit and the freezing room circuit by the three-way valve. The refrigerator compartment and the freezer compartment and the freezer compartment are alternately cooled, and when the temperature of the refrigerator compartment and the temperature of the freezer compartment are both lower than the set temperature, the compressor is stopped and the three-way valve is fully closed. The closed state continues until the next start of the compressor, Compressor stop during high-temperature high-pressure refrigerant refrigerating chamber and does not flow into the evaporator both of the freezing chamber, respectively it is possible to suppress the temperature rise of each room to a minimum. In particular, the use of a vacuum heat insulating material for the heat insulating box reduces the amount of heat absorption, and the effect can be further enhanced when the compressor stop time is longer than that using a conventional vacuum heat insulating material.

  In addition, since the refrigerant is held on the condenser side while the compressor is stopped, the refrigerant can be quickly supplied to each evaporator regardless of whether the next cooling is cooling in the refrigerator or freezer, improving the cooling efficiency. It becomes possible to do.

  The invention according to claim 2 is a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, an evaporator for a refrigerator compartment, a second capillary, and an evaporation for a freezer compartment. In the refrigerator having a refrigerator, a refrigerator for freezing room, and a freezer room fan and a freezer room, a vacuum heat insulating material is used for the heat insulating material of the heat insulating box constituting the refrigerator, the refrigerator room The freezer compartment evaporator is arranged in series with the freezer compartment evaporator, and the refrigerant flow is switched by the three-way valve between the refrigerator compartment circuit and the freezer compartment circuit by the three-way valve. -The freezer compartment and the freezer compartment are alternately cooled, and when the temperature of the refrigerator compartment and the temperature of the freezer compartment are both detected to be lower than the set temperature, the compressor is stopped and the three-way valve is placed on the evaporator side of the refrigerator compartment The three-way valve is refrigerated at the same time as the compressor stops. Since the opening in use the evaporator side circuit flexible response becomes possible with the actual conditions of use rather than dependency and cooling state just before stopping.

  In addition, since the pressure on the high-pressure side and the low-pressure side are balanced to the same pressure through the evaporator circuit for the refrigerator when starting the compressor, the torque applied to the compressor at the start-up can be minimized. It becomes possible to prevent starting failure due to insufficient torque.

  The invention according to claim 3 includes a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator, a second capillary, and evaporation for a freezer. In the refrigerator having a refrigerator, a refrigerator for freezing room, and a freezer room fan and a freezer room, a vacuum heat insulating material is used for the heat insulating material of the heat insulating box constituting the refrigerator, the refrigerator room The freezer compartment evaporator is arranged in series with the freezer compartment evaporator, and the refrigerant flow is switched by the three-way valve between the refrigerator compartment circuit and the freezer compartment circuit by the three-way valve.・ Alternatively cooling the freezer compartment and the freezer compartment, and when both the temperature of the refrigerator compartment and the temperature of the freezer compartment are detected below the set temperature, the compressor is stopped and the three-way valve is fully closed, When any one of the temperatures is detected above the set temperature, the three-way valve is The compressor is started after a predetermined time has elapsed after being opened on the evaporator side of the refrigerating room. When the compressor is stopped, the high-temperature and high-pressure refrigerant does not flow into both the refrigerating room and freezer evaporators. It is possible to minimize the temperature rise. In addition, since the pressure on the high-pressure side and the low-pressure side are balanced to the same pressure through the evaporator circuit for the refrigerator when starting the compressor, the torque applied to the compressor at the start-up can be minimized. It is possible to prevent a start-up failure due to insufficient torque, and to suppress the temperature rise in the refrigerator compartment to a minimum.

  According to a fourth aspect of the present invention, there is provided a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, and evaporation for a freezer compartment. In the refrigerator having a refrigerator, a refrigerator for freezing room, and a freezer room fan and a freezer room, a vacuum heat insulating material is used for the heat insulating material of the heat insulating box constituting the refrigerator, the refrigerator room The freezer compartment evaporator is arranged in series with the freezer compartment evaporator, and the refrigerant flow is switched by the three-way valve between the refrigerator compartment circuit and the freezer compartment circuit by the three-way valve.・ Alternatively cooling the freezer compartment and the freezer compartment, and when both the temperature of the refrigerator compartment and the temperature of the freezer compartment are detected below the set temperature, the compressor is stopped and the three-way valve is fully closed, When any one of the temperatures is detected above the set temperature, the three-way valve is The compressor is started after the elapse of a predetermined time after being opened on the evaporator side of the freezer compartment. When the compressor is stopped, the high-temperature and high-pressure refrigerant does not flow into the evaporators of the refrigerator compartment and the freezer compartment. It is possible to minimize the temperature rise. Also, since the pressure on the high-pressure side and the low-pressure side are balanced to the same pressure through the freezer compartment evaporator circuit when starting up the compressor, the torque applied to the compressor at startup can be minimized. It is possible to prevent a start-up failure due to insufficient torque, and to suppress the temperature rise in the refrigerator compartment to a minimum. Moreover, since the high-temperature and high-pressure refrigerant does not flow into the refrigerator compartment evaporator, the temperature rise in the refrigerator compartment can be minimized. In a system in which the refrigerator compartment evaporator and the refrigerator compartment evaporator are in parallel, if the three-way valve is opened on the refrigerator compartment evaporator side, the temperature rises only in the refrigerator compartment, but in the series system, the refrigerant that has passed through the refrigerator compartment evaporator Since it flows into the freezer compartment evaporator, the temperature of both the refrigerator compartment and the freezer compartment rises.

  The invention according to claim 5 is a compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, an evaporator for a refrigerator compartment, a second capillary, and an evaporation for a freezer compartment. In the refrigerator having a refrigerator, a refrigerator for freezing room, and a freezer room fan and a freezer room, a vacuum heat insulating material is used for the heat insulating material of the heat insulating box constituting the refrigerator, the refrigerator room The freezer compartment evaporator is arranged in series with the freezer compartment evaporator, and the refrigerant flow is switched by the three-way valve between the refrigerator compartment circuit and the freezer compartment circuit by the three-way valve.・ Alternatively cooling the freezer compartment and the freezer compartment, and when both the temperature of the refrigerator compartment and the temperature of the freezer compartment are detected below the set temperature, the compressor is stopped and the three-way valve is fully closed, When any one of the temperatures is detected above the set temperature, the three-way valve is While closed, the compressor is activated, which is operated a predetermined time, without flowing the high-temperature high-pressure refrigerant of the compressor startup, can transition to the cooling of the refrigerating compartment or the freezer compartment.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein a check valve is disposed between the evaporator for the freezer compartment and the compressor. Yes, it is possible to further suppress the temperature rise of the refrigerator and the freezer compartment evaporator when the compressor is stopped.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the refrigerator for cooling the refrigerator compartment is operated for a predetermined time after the simultaneous cooling of the refrigerator compartment / freezer compartment. The cold air of the evaporator for the refrigerator compartment in a temperature state lower than the temperature in the refrigerator compartment can be effectively used.

  The invention according to claim 8 is the invention according to any one of claims 1 to 6, wherein the refrigerator cooling fan is stopped for a predetermined time from the start of simultaneous cooling of the refrigerator compartment / freezer compartment. Since cooling in the refrigerator compartment can be started after the temperature of the evaporator for the refrigerator compartment is lowered, the cooling delay can be improved. Moreover, the inflow of the refrigerant to the freezer evaporator can be promoted, and the temperature rise in the freezer compartment can be minimized.

  The invention according to claim 9 is the invention according to any one of claims 1 to 6, wherein the freezer compartment cooling fan is stopped for a predetermined time from the start of simultaneous cooling of the refrigerator compartment and the freezer compartment. Further, when the cooling room / freezer room simultaneous cooling is performed, even if a high-temperature refrigerant flows into the freezer evaporator, the temperature increase in the freezer compartment can be minimized.

  A tenth aspect of the present invention is the invention according to any one of the first to sixth aspects, wherein the number of rotations of the freezer compartment cooling fan is reduced for a predetermined time from the start of simultaneous cooling of the refrigerator compartment and the freezer compartment. Therefore, even when a high-temperature refrigerant flows into the freezer compartment evaporator when the refrigerating room / freezer compartment simultaneous cooling is performed, the temperature increase in the freezer compartment can be minimized. Further, the refrigerant accumulated in the freezer evaporator can be quickly returned to the compressor, and the total amount of circulating refrigerant can be increased.

  The invention according to claim 11 is the invention according to any one of claims 1 to 6, wherein the freezer compartment cooling fan is operated for a predetermined time from the end of freezer compartment cooling. It is possible to effectively use the cool air of the freezer evaporator at a temperature lower than the internal temperature. Further, the refrigerant accumulated in the freezer evaporator can be returned to the compressor, and the amount of circulating refrigerant at the start of the next cooling can be increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure as the past, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. Further, the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic cross-sectional view of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a time chart of the first embodiment. In the figure, 18 is a refrigerator box, which has a refrigerator compartment 9 which is a relatively high temperature compartment in the upper part and a relatively low temperature freezer compartment 10 in the lower part, and is surrounded by urethane and vacuum heat insulating material. Insulated and configured. The storage of food and other items is performed through a heat insulating door (not shown).

  The refrigerator compartment 9 is usually set at 1 to 5 ° C. for refrigerated storage, but it may be set at a slightly lower temperature, for example, −3 to 0 ° C. for improving the freshness, depending on the stored items. In some cases, a person can freely switch the temperature setting as described above. In addition, in order to preserve wine, root vegetables, etc., the temperature may be set slightly higher, for example, around 10 ° C.

  The freezer compartment 10 is usually set at −22 to −18 ° C. for frozen storage, but may be set at a lower temperature, for example −30 to −25 ° C., for improving the freshness.

  The refrigeration cycle 19 includes a compressor 1, a condenser 2, a three-way valve 3, a first capillary 4, a refrigerating room evaporator 5, a first suction line 13, and a freezing room evaporator 7 in order. In the middle of the second capillary 6, the freezer compartment evaporator 7, the second suction line 14, and the second suction line 14 so as to be in parallel with the first capillary 4 via the three-way valve 3. A check valve 8 is connected.

  The compressor 1, the condenser 2, the three-way valve 3, and the check valve 8 are arranged in the machine room 17 in order to reduce the number of welded pipes in the refrigerator box 18 from the viewpoint of improving safety when a flammable refrigerant is used. It is set up.

  Further, the refrigerant returning from each evaporator is discharged through the compressor discharge pipe 16 after being discharged to the internal space of the compressor 1 through the compressor suction pipe 15.

  The refrigerating room evaporator 5 is disposed inside the refrigerating room 9, for example, on the inner surface of the refrigerating room 9, and in the vicinity, the air in the compartment of the refrigerating room 9 is passed through the refrigerating room evaporator 5 and circulated. A room fan 11 is provided.

  Further, the freezer compartment evaporator 7 is disposed in the freezer compartment 10, for example, at the back surface of the freezer compartment 10, and the compartment air in the freezer compartment 10 is circulated through the freezer compartment evaporator 7 in the vicinity. A freezer compartment fan 12 is provided.

  Further, the compressor 1 is of a variable capacity type that can control the refrigerant circulation amount by changing the number of revolutions by an inverter and change the refrigeration capacity.

  The three-way valve 3 is operated by a pulse motor, for example, and is energized only during the opening / closing operation.

  Further, the refrigerator compartment 9 and the freezer compartment 10 are provided with temperature detecting means TH1 and TH2, for example, thermistors for detecting the temperature in the compartment, and the compressor 1, the three-way valve 3, the refrigerator compartment fan 11, and the freezer compartment. Control means C1 for controlling the fan 12 is provided.

  FIG. 2 is a time chart according to the first embodiment of the present invention. About the refrigerator comprised as mentioned above, the cooling timing of the refrigerator compartment 9 and the freezer compartment 10 is demonstrated based on the time chart of FIG.

  When the compressor 1 is stopped, if either one of the temperature detection means TH1 or TH2 which is the temperature detection means of the refrigerator compartment 9 and the freezer compartment 10 detects a predetermined temperature or higher, the control means C1 receives this signal, For example, when the temperature detecting means of the refrigerating chamber 9 detects a predetermined temperature (t1H) or higher that is set in advance, the compressor 1 and the refrigerating chamber fan 11 are operated, and the three-way valve 3 is opened to the first capillary 4 side for refrigerating. Cooling of the chamber 9 is started (T1).

  The high-temperature and high-pressure refrigerant discharged by the operation of the compressor 1 releases heat in the condenser 2 to be condensed and liquefied, and reaches the first capillary 4 through the three-way valve 3. Thereafter, the pressure is reduced while exchanging heat with the first suction line 13 by the first capillary 4 and reaches the evaporator 5 for the refrigerator compartment. The refrigerant that has actively exchanged heat with the air in the refrigerating chamber 9 by the operation of the refrigerating chamber fan 11 evaporates and evaporates in the refrigerating chamber evaporator 5, and the heat-exchanged air is discharged as cooler air and is refrigerated. Cool chamber 9. The vaporized refrigerant passes through the first suction line 13, passes through the freezer evaporator 7, and is sucked into the compressor 1 through the second suction line 14.

  Control is performed when the refrigerator compartment temperature detection means TH1 is below a predetermined temperature (t1L) set in advance and the TH2 that is the freezer compartment temperature detection means detects below the preset predetermined temperature (t2L) during cooling of the refrigerator compartment 9. The means C1 receives this signal, stops the refrigerator compartment fan 11 and operates the freezer compartment fan 12, opens the three-way valve 3 to the second capillary 6 side, and starts cooling the freezer compartment 10 (T2).

  The high-temperature and high-pressure refrigerant discharged by the operation of the compressor 1 dissipates heat in the condenser 2 to be condensed and liquefied, and reaches the second capillary 6 through the three-way valve 3. Thereafter, the second capillary 6 is depressurized while exchanging heat with the second suction line 14, and reaches the freezer compartment evaporator 7. The refrigerant which has actively exchanged heat with the air in the freezer compartment 10 by the operation of the freezer fan 12 evaporates in the freezer compartment evaporator 7, and the heat-exchanged air is discharged as lower temperature air to be frozen. The chamber 10 is cooled. The vaporized refrigerant is sucked into the compressor 1 through the second suction line 14 and the check valve 8.

  When the freezer compartment temperature detection means TH2 detects a temperature lower than a predetermined temperature (t2L) set in advance during cooling of the freezer compartment 10 and TH1 as the refrigerator temperature detection means detects a temperature higher than a predetermined temperature (t1H) set in advance. C1 receives this signal, stops the freezer compartment fan 12 and activates the refrigerator compartment fan 11, opens the three-way valve 3 to the first capillary 4 side, and starts cooling the refrigerator compartment 9 (T3).

  By repeating the above operation and switching the flow of the refrigerant using the three-way valve 3, the refrigerator compartment 9 and the freezer compartment 10 are alternately cooled, and both temperature detecting means for the refrigerator compartment 9 and the refrigerator compartment 10 are preset. When it is detected that the temperature is lower than the predetermined temperature (t1H and t2L), the three-way valve 3 is closed for both the first capillary 4 side flow path and the second capillary 6 side flow path, and the compressor 1, the refrigerator compartment fan 11, the freezer compartment The fan 12 is stopped (T4).

  When the compressor 1 is stopped, if either one of the temperature detection means TH1 or TH2 which is the temperature detection means of the refrigerator compartment 9 and the freezer compartment 10 detects a predetermined temperature or higher, the control means C1 receives this signal, For example, when the temperature detecting means of the refrigerating chamber 9 detects a predetermined temperature (t1H) or higher that is set in advance, the compressor 1 and the refrigerating chamber fan 11 are operated, and the three-way valve 3 is opened to the first capillary 4 side for refrigerating. Cooling of the chamber 9 is started (T5).

  Since the three-way valve 3 is closed for both the first capillary 4 side flow path and the second capillary 6 side flow path when the compressor 1 is stopped, the high-temperature and high-pressure stayed in the condenser 2 during the operation of the compressor 1. This refrigerant does not flow into the refrigerator 5 for the refrigerator compartment and the evaporator 7 for the freezer compartment, so that the temperature rise in each room when the compressor 1 is stopped can be minimized.

  Further, since the check valve 8 is located between the freezer compartment evaporator 7 and the compressor 1 is stopped, if the three-way valve 3 is closed, the refrigerant flows into the refrigerator compartment evaporator 5 or the freezer compartment evaporator 7. Never do.

  In addition, since the refrigerant is held on the condenser 2 side while the compressor 1 is stopped, the refrigerant can be promptly supplied to each evaporator regardless of whether the next cooling is the cooling room 9 cooling or the freezing room 10 cooling. It becomes possible to improve cooling efficiency.

  The cooling room fan 11 is stopped and then cooling of the freezing room 10 is started. However, for the purpose of defrosting the freezing room evaporator 5, the cooling room fan 11 is stopped after a predetermined time has passed after the cooling room 10 starts cooling. Then, the next cooling of the refrigerator compartment 10 can be performed more efficiently.

(Embodiment 2)
FIG. 3 is a time chart of the refrigerator according to the second embodiment. Note that a description of the same control as in the first embodiment is omitted.

  When it is detected that both the temperature detecting means of the refrigerator compartment 9 and the freezer compartment 10 are lower than predetermined temperatures (t1H and t2L) set in advance, the three-way valve 3 is opened to the first capillary 4 side and the compressor 1 is stopped. (T6).

  When the compressor 1 is stopped, if either one of the temperature detection means TH1 or TH2 which is the temperature detection means of the refrigerator compartment 9 and the freezer compartment 10 detects a predetermined temperature or higher, the control means C1 receives this signal, For example, when the temperature detecting means of the refrigerating chamber 9 detects a predetermined temperature (t1H) or higher that is set in advance, the compressor 1 and the refrigerating chamber fan 11 are operated, and the three-way valve 3 is opened to the first capillary 4 side for refrigerating. Cooling of the chamber 9 is started (T7).

  Since the three-way valve 3 is opened to the refrigerating room evaporator 5 side at the same time as the compressor 1 is stopped, the cooling state immediately before the stop can be stopped from the cooling of the refrigerating room 9 cooling or the freezing room 10 cooling. Therefore, a flexible response is possible under actual use conditions.

(Embodiment 3)
FIG. 4 is a time chart of the refrigerator according to the third embodiment. Note that a description of the same control as in the first embodiment is omitted.

  When it is detected that both the temperature detecting means of the refrigerator compartment 9 and the freezer compartment 10 are lower than predetermined temperatures (t1H and t2L) set in advance, the three-way valve 3 is connected to the first capillary 4 side flow path and the second capillary 6 side. Both the flow paths are closed and the compressor 1 is stopped (T8).

  When the compressor 1 is stopped, if either one of the temperature detection means TH1 or TH2 which is the temperature detection means of the refrigerator compartment 9 and the freezer compartment 10 detects a predetermined temperature or higher, the control means C1 receives this signal, For example, when the temperature detection means in the refrigerator compartment 9 detects a predetermined temperature (t1H) or higher that is set in advance, the three-way valve 3 is opened to the refrigerator compartment evaporator 5 side (T9).

  After a predetermined time elapses, the compressor 1 and the refrigerator compartment fan 11 are actuated to start cooling the refrigerator compartment 9 (T10).

  Since the pressure on the high-pressure side and the low-pressure side are balanced to the same pressure through the evaporator 5 circuit for the refrigerator compartment when the compressor 1 is started, the torque applied to the compressor 1 at the start-up can be minimized. It is possible to prevent the starting failure due to the torque shortage of 1, and the three-way valve 3 is connected to the evaporator 5 side of the refrigerator until the temperature detecting means of the refrigerator 9 detects a predetermined temperature (t1H) or higher. Since both the freezer compartment evaporator 7 side is closed, the temperature increase in the refrigerator compartment 9 can be minimized.

  The time from T9 to T10 is set to the minimum time until the high and low pressures are balanced. However, since the time during which the high and low pressures are balanced varies depending on the outside air temperature, further cooling occurs when the time from T9 to T10 is set for each outside air temperature. Efficiency can be improved.

  Further, as shown in FIG. 5, when the temperature detection means of the freezer compartment 10 detects a predetermined temperature (t2H) or higher while the compressor 1 is stopped, the three-way valve 3 is similarly connected to the refrigerator compartment evaporator 5 side. After a predetermined time has elapsed, the compressor 1 and the freezer compartment fan 12 are operated to open the three-way valve 3 toward the second capillary 6 and cooling of the freezer compartment 10 is started.

  Even when the internal temperature of the freezer compartment 10 rises while the compressor 1 is stopped, the three-way valve 3 is opened to the refrigerator compartment evaporator 5 side to balance the high and low pressures, so that the temperature rise of the freezer compartment 10 is minimized. It becomes possible.

(Embodiment 4)
FIG. 6 is a time chart of the refrigerator according to the fourth embodiment. Note that a description of the same control as in the first embodiment is omitted.

  When it is detected that both the temperature detecting means of the refrigerator compartment 9 and the freezer compartment 10 are lower than predetermined temperatures (t1H and t2L) set in advance, the three-way valve 3 is connected to the first capillary 4 side flow path and the second capillary 6 side. Both the flow paths are closed and the compressor 1 is stopped (T8).

  When the compressor 1 is stopped, if either one of the temperature detection means TH1 or TH2 which is the temperature detection means of the refrigerator compartment 9 and the freezer compartment 10 detects a predetermined temperature or higher, the control means C1 receives this signal, For example, when the temperature detection means of the refrigerator compartment 9 detects a predetermined temperature (t1H) or higher set in advance, the three-way valve 3 is opened to the freezer compartment evaporator 7 side (T9).

  After a predetermined time elapses, the compressor 1 and the refrigerator compartment fan 11 are actuated to start cooling the refrigerator compartment 9 (T10).

  Since the pressure on the high pressure side and the low pressure side are balanced to the same pressure via the freezer compartment evaporator 7 circuit when the compressor 1 is started, the torque applied to the compressor 1 at the start can be minimized. It is possible to prevent the starting failure due to the torque shortage of 1, and the three-way valve 3 is connected to the evaporator 5 side of the refrigerator until the temperature detecting means of the refrigerator 9 detects a predetermined temperature (t1H) or higher. Since both the freezer compartment evaporator 7 side is closed, the temperature increase in the refrigerator compartment 9 and the freezer compartment 10 can be minimized.

  Further, since the refrigerant does not flow into the refrigerator compartment evaporator 5, the temperature rise of the refrigerator compartment 9 can be minimized.

  The time from T9 to T10 is set to the minimum time until the high and low pressures are balanced. However, since the time during which the high and low pressures are balanced varies depending on the outside air temperature, further cooling occurs when the time from T9 to T10 is set for each outside air temperature Efficiency can be improved.

(Embodiment 5)
FIG. 7 is a time chart of the refrigerator of the fifth embodiment. Note that a description of the same control as in the first embodiment is omitted.

  When it is detected that both the temperature detecting means of the refrigerator compartment 9 and the freezer compartment 10 are lower than predetermined temperatures (t1H and t2L) set in advance, the three-way valve 3 is connected to the first capillary 4 side flow path and the second capillary 6 side. Both the flow paths are closed and the compressor 1 is stopped (T8).

  When the compressor 1 is stopped, if either one of the temperature detection means TH1 or TH2 which is the temperature detection means of the refrigerator compartment 9 and the freezer compartment 10 detects a predetermined temperature or higher, the control means C1 receives this signal, For example, when the temperature detection means of the refrigerator compartment 9 detects a predetermined temperature (t1H) or higher that is set in advance, the compressor 1 is operated with the three-way valve 3 fully closed (T9).

  After a predetermined time has elapsed, the three-way valve 3 is opened, for example, to the refrigerator compartment evaporator 5 side, and the refrigerator compartment fan 11 is operated to start cooling the refrigerator compartment 9 (T10). Since the cooling is started after a predetermined time has passed since the compressor 1 was operated, it is possible to improve the cooling delay. Further, since the evaporation of the refrigerant staying in the freezer evaporator 7 can be promoted, the cooling efficiency of the refrigerator compartment 9 or the freezer compartment 10 can be improved.

(Embodiment 6)
FIG. 8 is a time chart of the refrigerator according to the sixth embodiment. Note that description of the same control as in the first embodiment is omitted.

  When the refrigerator compartment temperature detection means TH1 detects a predetermined temperature (t1L) or lower during cooling of the refrigerator compartment 9, the control means C1 receives this signal and continues to operate the refrigerator compartment fan 11 (T13).

  By operating the refrigerator compartment fan 11 at the end of cooling in the refrigerator compartment 9, it is possible to promote the evaporation of the refrigerant staying in the evaporator 7 for the refrigerator compartment, so that the cooling efficiency of the refrigerator compartment 9 can be improved. .

(Embodiment 7)
FIG. 9 is a time chart of the refrigerator according to the seventh embodiment. Note that description of the same control as in the first embodiment is omitted.

  When the refrigerator compartment temperature detection means TH1 detects a predetermined temperature (t1H) or higher during the cooling of the freezer compartment 10 or when the compressor 1 is stopped, the control means C1 receives this signal and causes the three-way valve 3 to open the refrigerator compartment evaporator. 7 side, and simultaneous cooling of the refrigerator compartment 9 and the freezer compartment 10 is started. At this time, the refrigerator compartment fan 11 is not operated for a predetermined time from the start of simultaneous cooling of the refrigerator compartment 9 and the freezer compartment 10 by the timer.

  By not operating the refrigeration room fan, the temperature of the refrigeration room evaporator 7 can be lowered, the refrigerant flow into the freezing room evaporator 7 is promoted, and the temperature rise of the freezing room 10 can be minimized. .

(Embodiment 8)
FIG. 10 is a time chart of the refrigerator according to the eighth embodiment. Note that description of the same control as in the first embodiment is omitted.

  When the refrigerator compartment temperature detection means TH1 detects a predetermined temperature (t1H) or higher during the cooling of the freezer compartment 10 or when the compressor 1 is stopped, the control means C1 receives this signal and causes the three-way valve 3 to open the refrigerator compartment evaporator. 7 side, and simultaneous cooling of the refrigerator compartment 9 and the freezer compartment 10 is started. At this time, the freezer compartment fan 12 is not operated for a predetermined time from the start of simultaneous cooling of the refrigerator compartment 9 and the freezer compartment 10 by the timer.

  By stopping the freezer compartment fan 12 at the start of cooling of the freezer compartment 9, the high-temperature refrigerant after cooling of the freezer compartment 9 flows into the freezer compartment evaporator 7, and the freezer compartment evaporator 7 becomes hotter than the freezer compartment 10. Even in such a case, the temperature rise of the freezer compartment 10 can be minimized.

(Embodiment 9)
FIG. 11 is a time chart of the refrigerator according to the ninth embodiment. Note that description of the same control as in the first embodiment is omitted.

  When the refrigerator compartment temperature detection means TH1 detects a predetermined temperature (t1H) or higher during the cooling of the freezer compartment 10 or when the compressor 1 is stopped, the control means C1 receives this signal and causes the three-way valve 3 to open the refrigerator compartment evaporator. 7 side, and simultaneous cooling of the refrigerator compartment 9 and the freezer compartment 10 is started. At this time, the freezer compartment fan 12 is not operated for a predetermined time from the start of simultaneous cooling of the refrigerator compartment 9 and the freezer compartment 10 by the timer.

  By reducing the rotational speed of the freezer compartment fan 12 at the start of cooling of the freezer compartment 9, the high-temperature refrigerant after cooling of the freezer compartment 9 flows into the freezer compartment evaporator 7, and the freezer compartment evaporator 7 comes from the freezer compartment 10. Even when the temperature becomes high, the temperature rise of the freezer compartment 10 can be minimized.

  Moreover, by operating the freezer compartment fan 12, evaporation of the refrigerant staying in the freezer compartment evaporator 7 can be promoted, and cooling of the refrigerator compartment 9 can be promoted.

(Embodiment 10)
FIG. 12 is a time chart of the refrigerator according to the tenth embodiment. Note that description of the same control as in the first embodiment is omitted.

  When the freezer compartment temperature detection means TH1 detects a predetermined temperature (t2L) or lower during cooling of the freezer compartment 10, the control means C1 receives this signal and continues to operate the freezer compartment fan 12 (T13).

  By operating the freezer compartment fan 12 at the end of cooling of the freezer compartment 10, evaporation of the refrigerant remaining in the freezer compartment evaporator 8 can be promoted, so that the cooling efficiency of the freezer compartment 10 can be improved.

  As described above, in the refrigerator according to the present invention, the high-temperature and high-pressure refrigerant does not flow into both the refrigerator and the freezer when the compressor is stopped, and energy saving can be achieved, so that the cooling device having the same refrigeration cycle. It can be effectively applied to.

Sectional drawing of the refrigerator of Embodiment 1 of this invention Time chart of refrigerator of Embodiment 1 of the present invention Time chart of the refrigerator according to the second embodiment of the present invention Time chart of the refrigerator according to the third embodiment of the present invention Another time chart of the refrigerator according to the third embodiment of the present invention Time chart of refrigerator according to embodiment 4 of the present invention Time chart of refrigerator according to embodiment 5 of the present invention Time chart of refrigerator according to embodiment 6 of the present invention Time chart of refrigerator according to embodiment 7 of the present invention Time chart of refrigerator according to embodiment 8 of the present invention Time chart of the refrigerator according to the ninth embodiment of the present invention Time chart of refrigerator of embodiment 10 of the present invention Cross-sectional view of a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Three-way valve 4 1st capillary 5 Refrigerating room evaporator 6 2nd capillary 7 Freezer room evaporator 8 Check valve 9 Refrigerating room 10 Freezing room 11 Refrigerating room fan 12 For freezing room Fan 18 Refrigerator box 20 Vacuum insulation

Claims (11)

A compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, a fan for a refrigerator compartment, In a refrigerator having a refrigerator compartment and a refrigerator compartment provided with a freezer compartment fan, a vacuum insulation material is used for the insulation material of the insulation box constituting the refrigerator, and the evaporator for the refrigerator compartment is provided in the refrigerator compartment. The freezer compartment evaporator is arranged in series in the freezer compartment, and the three-way valve switches the refrigerant flow between the refrigerator compartment / freezer compartment circuit and the freezer compartment circuit to alternate the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both lower than the set temperature, the compressor is stopped and the three-way valve is fully closed, and the fully closed state continues until the next start of the compressor. A refrigerator characterized by that. A compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, and a fan for cooling the refrigerator compartment In the refrigerator having a refrigerator compartment and a refrigerator compartment provided with a freezer fan, a vacuum insulation material is used for the insulation material of the insulation box constituting the refrigerator, and the evaporator for the refrigerator compartment is provided in the refrigerator compartment. The freezer compartment evaporator is disposed in series in the freezer compartment, and the three-way valve switches the refrigerant flow to a refrigerator compartment / freezer compartment circuit and a freezer compartment circuit, thereby connecting the refrigerator compartment / freezer compartment and the freezer compartment. It cools alternately, and when the temperature of the refrigerator compartment and the temperature of the freezer compartment detect both below a preset temperature, the compressor is stopped and the three-way valve is opened to the evaporator side of the refrigerator compartment, Refrigerator. A compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, a fan for a refrigerator compartment, In a refrigerator having a refrigerator compartment and a refrigerator compartment provided with a freezer compartment fan, a vacuum insulation material is used for the insulation material of the insulation box constituting the refrigerator, and the evaporator for the refrigerator compartment is provided in the refrigerator compartment. The freezer compartment evaporator is arranged in series in the freezer compartment, and the three-way valve switches the refrigerant flow between the refrigerator compartment / freezer compartment circuit and the freezer compartment circuit to alternate the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both lower than the set temperature, the compressor is stopped and the three-way valve is fully closed, and either one of the internal temperatures is the set temperature. When the above is detected, the three-way valve is opened to the refrigerator compartment side. Refrigerator, characterized in that activating after a predetermined time has elapsed the compressor After. A compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, a fan for a refrigerator compartment, In a refrigerator having a refrigerator compartment and a refrigerator compartment provided with a freezer compartment fan, a vacuum insulation material is used for the insulation material of the insulation box constituting the refrigerator, and the evaporator for the refrigerator compartment is provided in the refrigerator compartment. The freezer compartment evaporator is arranged in series in the freezer compartment, and the three-way valve switches the refrigerant flow between the refrigerator compartment / freezer compartment circuit and the freezer compartment circuit to alternate the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both lower than the set temperature, the compressor is stopped and the three-way valve is fully closed, and either one of the internal temperatures is the set temperature. When the above is detected, the three-way valve is opened to the freezer evaporator side. Refrigerator, characterized in that activating after a predetermined time has elapsed the compressor After. A compressor, a condenser, a three-way valve that is a flow path switching means, a first capillary, a refrigerator for a refrigerator compartment, a second capillary, an evaporator for a freezer compartment, a fan for a refrigerator compartment, In a refrigerator having a refrigerator compartment and a refrigerator compartment provided with a freezer compartment fan, a vacuum insulation material is used for the insulation material of the insulation box constituting the refrigerator, and the evaporator for the refrigerator compartment is provided in the refrigerator compartment. The freezer compartment evaporator is arranged in series in the freezer compartment, and the three-way valve switches the refrigerant flow between the refrigerator compartment / freezer compartment circuit and the freezer compartment circuit to alternate the refrigerator compartment / freezer compartment and the freezer compartment. When the temperature of the refrigerator compartment and the temperature of the freezer compartment are both lower than the set temperature, the compressor is stopped and the three-way valve is fully closed, and either one of the internal temperatures is the set temperature. When the above is detected, the three-way valve is fully closed and the compressor Start is a refrigerator, characterized in that to operate a predetermined time. The refrigerator according to any one of claims 1 to 5, wherein a check valve is disposed between the freezer evaporator and the compressor. The refrigerator according to any one of claims 1 to 6, wherein the refrigerator for cooling the refrigerator compartment is operated for a predetermined time after the simultaneous cooling of the refrigerator compartment and the freezer compartment. The refrigerator according to any one of claims 1 to 6, wherein the refrigerator cooling fan is stopped for a predetermined time from the start of simultaneous cooling of the refrigerator compartment and the freezer compartment. The refrigerator according to any one of claims 1 to 6, wherein the freezer compartment cooling fan is stopped for a predetermined time from the start of simultaneous cooling of the refrigerator compartment and the freezer compartment. The refrigerator according to any one of claims 1 to 6, wherein the number of rotations of the freezer compartment cooling fan is decreased for a predetermined time from the start of simultaneous cooling of the refrigerator compartment and the freezer compartment. The refrigerator according to any one of claims 1 to 6, wherein the freezer compartment cooling fan is operated for a predetermined time from the end of freezer compartment cooling.

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