JP6355325B2 - Refrigerator and control method of refrigerator - Google Patents

Description

  The present invention relates to a refrigerator and a refrigerator control method.

  As a conventional refrigerator, a storage chamber, a refrigerant circulation circuit in which a compressor, a condenser, a decompressor, and an evaporator are connected by piping, a cooling chamber in which an evaporator is disposed, and a blowout from the cooling chamber to the storage chamber And an air volume adjusting unit that adjusts the air volume of the cool air to be generated. In such a refrigerator, when the indoor temperature of the storage chamber becomes lower than the target indoor temperature, the compressor is stopped to suppress excessive cooling in the storage chamber (see, for example, Patent Document 1). .

JP-A-11-304331 (paragraph [0002] to paragraph [0005], FIG. 12)

  In the conventional refrigerator, after the compressor is stopped, when the room temperature of the storage chamber rises due to the ambient air of the refrigerator, the compressor is restarted and cooling of the storage chamber is resumed. At that time, in the state where the pressure of the refrigerant in the refrigerant circuit is made uniform by stopping the compressor, it is necessary to generate a pressure difference again in the refrigerant in the refrigerant circuit, so an On-Off loss occurs, There was a problem that the operating efficiency of the refrigerator was lowered. In addition, there is a problem that the room temperature of the storage room varies greatly and the quality maintenance performance of the food stored in the refrigerator is low.

  The present invention has been made against the background of the above problems, and provides a refrigerator having improved operating efficiency and quality maintenance performance of stored foods and the like. Moreover, this invention obtains the control method of the refrigerator which improved driving | operation efficiency and quality maintenance performance of the foodstuff etc. which are stored.

The refrigerator according to the present invention includes a plurality of storage chambers, a refrigerant circulation circuit in which a compressor, a condenser, a decompressor, and an evaporator are connected by piping, a cooling chamber in which the evaporator is disposed, and the cooling An air volume adjusting unit that adjusts the air volume of the cool air blown from the chamber to the plurality of storage chambers, and a control unit that controls the operation of the compressor and the air volume adjusting unit. A fan that generates cold air, and a plurality of opening degree adjustment units that adjust the opening degree of the passage position of the cold air, and the control unit determines the number of rotations of the compressor of the refrigerant in the refrigerant circulation circuit. The rotation speed is controlled to be greater than 0 in proportion to the temperature difference between the evaporation temperature and the target evaporation temperature , the rotation speed of the fan is changed according to the rotation speed of the compressor, and the plurality of opening degrees By controlling the opening degree of the adjusting unit, the air volume of each storage room is changed to the room of each storage room. Temperature is one of changing the air volume to approach the target room temperature.

  In the refrigerator according to the present invention, the control unit changes the rotation speed of the compressor to a rotation speed at which the evaporation temperature of the refrigerant in the refrigerant circulation circuit approaches the target evaporation temperature, and the air volume of the air volume adjustment unit is The room temperature is changed to an air volume that approaches the target room temperature. Therefore, the compressor is stopped depending on the room temperature of the storage room, and the occurrence of On-Off loss is suppressed, and the operation efficiency of the refrigerator is improved. In addition, since fluctuations in the room temperature of the storage room are suppressed by adjusting the air volume of the air volume adjusting unit, it is possible to achieve both improvement in operating efficiency of the refrigerator and improvement in quality maintenance performance of food stored in the refrigerator. .

It is a figure for demonstrating schematic structure of the refrigerator which concerns on Embodiment 1. FIG. It is a figure for demonstrating the structure of the control part of the refrigerator which concerns on Embodiment 1. FIG. It is a figure for demonstrating the rapid cooling stability determination flow of the refrigerator which concerns on Embodiment 1. FIG. It is a figure for demonstrating the rapid cooling operation control flow of the refrigerator which concerns on Embodiment 1. FIG. It is a figure which shows the relationship between the compressor rotation speed of the refrigerator which concerns on Embodiment 1, and a fan rotation speed. It is a figure for demonstrating the stable operation control flow of the refrigerator which concerns on Embodiment 1. FIG. It is a figure which shows the relationship between the temperature difference of the evaporation temperature of the refrigerator which concerns on Embodiment 1, and target evaporation temperature, and compressor rotation speed. It is a figure which shows the relationship between the temperature difference of the room temperature of the refrigerator which concerns on Embodiment 1, and target indoor temperature, and a damper opening degree. It is a figure for demonstrating schematic structure of the refrigerator which concerns on Embodiment 2. FIG. It is a figure for demonstrating the structure of the control part of the refrigerator which concerns on Embodiment 2. FIG. It is a figure for demonstrating the rapid cooling operation control flow of the refrigerator which concerns on Embodiment 2. FIG. It is a figure for demonstrating the stable operation control flow of the refrigerator which concerns on Embodiment 2. FIG. It is a figure which shows the relationship between the temperature difference of the room temperature of the refrigerator which concerns on Embodiment 2, and target indoor temperature, and a fan rotation speed.

Hereinafter, the refrigerator according to the present invention will be described with reference to the drawings.
In the following, a case where the refrigerator according to the present invention includes a refrigerator room, a freezer room, and a vegetable room as a storage room is described. However, the refrigerator according to the present invention is not limited to such a case. , One of those storage rooms may be provided, or another storage room may be provided. Moreover, the structure, operation | movement, etc. which are demonstrated below are examples, and the refrigerator which concerns on this invention is not limited to the case where it is such a structure, operation | movement, etc. Further, the illustration of the fine structure is simplified or omitted as appropriate. In addition, overlapping descriptions are simplified or omitted as appropriate.

Embodiment 1 FIG.
Below, the refrigerator which concerns on Embodiment 1 is demonstrated.
<Fridge configuration>
Below, the structure of the refrigerator which concerns on Embodiment 1 is demonstrated.
(Outline configuration)
First, a schematic configuration of the refrigerator according to Embodiment 1 will be described.
FIG. 1 is a diagram for explaining a schematic configuration of the refrigerator according to the first embodiment.

  As shown in FIG. 1, the refrigerator 100 includes a casing 1 in which a refrigerator compartment 2, a freezer compartment 3, a vegetable compartment 4, and a cooling compartment 5 are formed. The front side of the refrigerator compartment 2, the freezer compartment 3, and the vegetable compartment 4 is opened and closed by doors 6a, 6b, and 6c. The refrigerator compartment 2 and the cooling compartment 5 are connected by the air path 7a. The freezing chamber 3 and the cooling chamber 5 are communicated with each other by an air passage 7b. The vegetable compartment 4 and the cooling compartment 5 are communicated with each other by an air passage 7c.

  The refrigerator 100 is a refrigerant in which a compressor 12, a condenser (heat source side heat exchanger) 13, a decompressor 14, and an evaporator (load side heat exchanger) 15 are connected by a pipe (for example, a copper pipe). A circulation circuit 11 is included. The compressor 12 is variable in rotation speed. The evaporator 15 is provided in the cooling chamber 5. The cooling chamber 5 is provided with a fan 21 that generates an airflow that passes through the evaporator 15 and flows into the air passages 7a, 7b, and 7c. The fan 21 is variable in rotation speed. The fan 21 may be on the leeward side of the evaporator 15 or may be on the leeward side of the evaporator 15.

  Dampers 22a, 22b, and 22c are provided in the air passages 7a, 7b, and 7c, respectively. The dampers 22a, 22b, and 22c are composed of, for example, a plate-like member and an actuator that rotates the plate-like member, and change the rotation angle of the plate-like member to open the air passages 7a, 7b, and 7c. Change (airway cross-sectional area). That is, the damper 22a adjusts the air volume of the cold air blown from the cooling chamber 5 to the refrigerator compartment 2 through the air passage 7a by the fan 21. The damper 22b adjusts the air volume of the cold air blown from the cooling chamber 5 to the freezing chamber 3 by the fan 21 through the air path 7b. The damper 22c adjusts the air volume of the cold air blown from the cooling chamber 5 to the vegetable chamber 4 by the fan 21 through the air path 7c. The fan 21 and the damper 22a correspond to the “air volume adjusting unit” in the present invention. The fan 21 and the damper 22b correspond to the “air volume adjusting unit” in the present invention. The fan 21 and the damper 22c correspond to the “air volume adjusting unit” in the present invention. The dampers 22a, 22b, and 22c correspond to the “opening adjustment unit” in the present invention.

  The refrigerator 100 includes a control unit 91. The control unit 91 governs the overall operation of the refrigerator 100. The controller 91 is connected to the compressor 12, the pressure reducer 14, the fan 21, the dampers 22a, 22b, 22c, and the like. The control unit 91 may be configured with, for example, a microcomputer, a microprocessor unit, or the like, may be configured with updatable firmware or the like, and is a program module that is executed by a command from the CPU or the like It may be.

  Room temperature sensors 31a, 31b, and 31c for detecting the room temperature TRa, TRb, and TRc of each storage room are provided in each of the refrigerator compartment 2, the freezer compartment 3, and the vegetable compartment 4. The indoor temperature sensors 31a, 31b, and 31c are connected to the control unit 91, and the detection results are output to the control unit 91. The indoor temperature sensors 31a, 31b, and 31c may detect other physical quantities that can be replaced with the indoor temperatures TRa, TRb, and TRc. Further, the indoor temperature sensors 31a, 31b, and 31c do not necessarily have to be disposed at the illustrated positions, and the indoor temperatures TRa, TRb, and TRc, or other physical quantities that can be replaced with the indoor temperatures TRa, TRb, and TRc. As long as it is a location that can be detected, it may be arranged in another location. Also, a plurality of indoor temperature sensors 31a, 31b, and 31c may be provided. For example, average values thereof may be calculated as the indoor temperatures TRa, TRb, and TRc.

  Each of the refrigerator compartment 2, the freezer compartment 3, and the vegetable compartment 4 is provided with door opening / closing sensors 32a, 32b, and 32c that detect opening and closing of the doors 6a, 6b, and 6c of each storage compartment. The door opening / closing sensors 32a, 32b, and 32c are connected to the control unit 91, and the detection result is output to the control unit 91. The door opening / closing sensors 32a, 32b, and 32c do not necessarily have to be disposed at the illustrated locations, and may be disposed at other locations as long as they can detect the opening / closing of the doors 6a, 6b, and 6c of each storage chamber. May be.

  The evaporator 15 is provided with an evaporation temperature sensor 33 that detects the evaporation temperature TE of the refrigerant. The evaporation temperature sensor 33 is connected to the control unit 91, and the detection result is output to the control unit 91. The evaporation temperature sensor 33 may detect another physical quantity that can be replaced with the evaporation temperature TE. That is, the evaporation temperature sensor 33 may detect and output the temperature of the refrigerant itself in the evaporator 15, and may detect the temperature of the members (pipes, fins, etc.) constituting the evaporator 15. It may be output. Further, the evaporation temperature sensor 33 may detect the pressure of the refrigerant in the evaporator 15 and obtain and output the refrigerant saturation temperature, that is, the evaporation temperature TE from the detected value. The pressure of the refrigerant itself may be output. The evaporation temperature sensor 33 does not necessarily have to be disposed at the illustrated location, and may be disposed at other locations as long as it can detect the evaporation temperature TE or other physical quantities that can be replaced with the evaporation temperature TE. May be.

(Configuration of control unit)
Next, the structure of the control part of the refrigerator which concerns on Embodiment 1 is demonstrated.
FIG. 2 is a diagram for explaining the configuration of the control unit of the refrigerator according to the first embodiment.

  As shown in FIG. 2, the control unit 91 includes a compressor rotation number control unit 92, a damper opening degree control unit 93, and a fan rotation number control unit 94. The compressor rotation speed control unit 92 controls the rotation speed of the compressor 12. The damper opening degree control unit 93 controls the opening degree of the dampers 22a, 22b, and 22c. The fan rotation speed control unit 94 controls the rotation speed of the fan 21.

  The control unit 91 has a target indoor temperature output unit 95. The target room temperature output unit 95 outputs target room temperatures TRa_t, TRb_t, and TRc_t, which are target values of the room temperatures TRa, TRb, and TRc of each storage room. The target room temperatures TRa_t, TRb_t, and TRc_t may be input by a user or the like, stored in the control unit 91 in advance, or calculated at any time in the control flow by the control unit 91. Good.

  The control unit 91 has a target evaporation temperature output unit 96. The target evaporation temperature output unit 96 outputs a target evaporation temperature TE_t that is a target value of the refrigerant evaporation temperature TE. The target evaporation temperature TE_t is calculated by the following formula 1 using the target room temperature TRb_t of the coldest storage room, that is, the freezing room 3. ΔT is set to a value that allows efficient use of the evaporator 15. For example, ΔT is set to 3 to 5 ° C.

  The control unit 91 includes a rapid cooling stability determination unit 97. The rapid cooling stability determination unit 97 determines whether the refrigerator 100 is to be rapidly cooled or stably operated. Note that the refrigerator 100 may have a function of allowing a user or the like to input whether the refrigerator 100 is rapidly cooled or stably operated. Here, the rapid cooling operation is performed, for example, immediately after the doors 6a, 6b, 6c of the refrigerator 100 are opened or closed, immediately after the refrigerator 100 is turned on, etc. It is defined as an operation that lowers the room temperature TRa, TRb, TRc. Further, the stable operation is defined as an operation after the room temperature TRa, TRb, TRc of the storage room has sufficiently decreased over time from the start of the rapid cooling operation.

<Operation of refrigerator>
Below, operation | movement of the refrigerator which concerns on Embodiment 1 is demonstrated.
(Outline operation)
First, the schematic operation of the refrigerator according to the first embodiment will be described.
The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 12 is arranged along the condenser 13, the outer surface of the casing 1, etc., and the piping between the compressor 12 and the condenser 13 and the condenser 13. The heat exchange with the ambient air of the casing 1 is performed by passing through the pipe between the pressure reducer 14 and the decompressor 14, and the heat is condensed by the heat radiation to the ambient air. The condensed high-pressure liquid refrigerant is decompressed by the decompressor 14 to become a low-pressure gas-liquid two-phase refrigerant. The low-pressure gas-liquid two-phase refrigerant exchanges heat with the air led from the respective storage chambers to the cooling chamber 5 by the fan 21 in the evaporator 15 disposed in the cooling chamber 5. The air is cooled, and the refrigerant becomes a low-pressure gaseous refrigerant. The low-pressure gaseous refrigerant flows into the compressor 12 and is pressurized again and discharged.

  The air led from the respective storage chambers into the cooling chamber 5 by the fan 21 is cooled by the evaporator 15 to become cold air, and then blown out to the respective storage chambers through the air passages 7a, 7b and 7c. The dampers 22a, 22b, and 22c provided in the air passages 7a, 7b, and 7c adjust the air volume of the cold air blown into each storage room, thereby adjusting the temperature of each storage room. The air that has cooled each storage chamber flows into the cooling chamber 5 through the return air passage, and is cooled again by the evaporator 15.

(Operation of control unit)
Next, operation | movement of the control part of the refrigerator which concerns on Embodiment 1 is demonstrated.
First, the flow for determining the rapid cooling stability of the refrigerator according to the first embodiment will be described.
FIG. 3 is a diagram for explaining a rapid cooling stability determination flow of the refrigerator according to the first embodiment.

  As shown in FIG. 3, the rapid cooling stability determination unit 97 determines whether or not it is immediately after the refrigerator 100 is turned on in S101. When it is not immediately after, it progresses to S102, and when it is immediately after, it progresses to rapid cooling operation control flow. In S102, the rapid cooling stability determination unit 97 determines whether or not it is immediately after the doors 6a, 6b, 6c of the storage chamber are opened and closed based on the outputs of the door opening / closing sensors 32a, 32b, 32c. When it is immediately after, it progresses to S103, and when it is not immediately after, it progresses to S104. In S103, the rapid cooling stability determination unit 97 stores in advance the room temperatures TRa, TRb, TRc detected by the room temperature sensors 31a, 31b, 31c of the storage rooms corresponding to the opened and closed doors 6a, 6b, 6c. It is determined whether or not it is larger than the set values TRa_set, TRb_set, and TRc_set that are set every time. If not, the process proceeds to S104, and if larger, the process proceeds to the rapid cooling operation control flow. In S104, the rapid cooling stability determination unit 97 determines whether or not it is immediately after the defrosting operation of the evaporator 15 is completed. When it is not immediately after, it progresses to the stable operation control flow, and when it is immediately after, it progresses to the rapid cooling operation control flow.

Next, a control flow during the rapid cooling operation of the refrigerator according to the first embodiment will be described.
FIG. 4 is a diagram for explaining a rapid cooling operation control flow of the refrigerator according to the first embodiment. FIG. 5 is a diagram illustrating a relationship between the compressor rotation speed and the fan rotation speed of the refrigerator according to the first embodiment.

  As shown in FIG. 4, in S201, the control unit 91 causes the compressor rotation speed control unit 92 to change the compressor rotation speed FComp of the compressor 12 to the compressor rotation speed FComp of the compressor 12 during stable operation. Control is performed so that the compressor speed FComp_2 is higher than that of the compressor. Further, the damper opening degree control unit 93 is controlled so that the damper opening degree CPulse of the dampers 22a, 22b, and 22c corresponding to the storage chamber to be rapidly cooled becomes the fully opened damper opening degree CPulse_max. Further, the fan rotation speed control unit 94 is controlled so that the fan rotation speed FFan of the fan 21 is higher than the fan rotation speed FFan_2 of the fan 21 during the stable operation. Then, the process proceeds to S202.

  For example, the control unit 91 controls the relationship between the compressor rotational speed FComp and the fan rotational speed FFan so as to have a proportional relationship shown in FIG. 5, and the compressor rotational speed FComp_2 and the fan rotational speed FFan_2 are , The value satisfying the proportional relationship is set.

  In S202, the controller 91 determines whether or not X minutes have elapsed after starting the rapid cooling operation. If X minutes have elapsed, the control unit 91 proceeds to S203. In S203, the control unit 91 calculates the indoor temperature changes ΔTRa, ΔTRb, ΔTRc in X minutes of the indoor temperatures TRa, TRb, TRc detected by the indoor temperature sensors 31a, 31b, 31c of the storage room being rapidly cooled. It is calculated, and it is determined whether or not it is smaller than the set values ΔTRa_set, ΔTRb_set, ΔTRc_set set in advance for each storage room. If it is smaller, the process proceeds to S204. If it is not smaller, the process proceeds to S205. In S204, the control unit 91 causes the compressor rotation speed control unit 92 to increase the compressor rotation speed FComp, and proceeds to S205.

  For example, when the rapid cooling operation is performed in all the storage rooms immediately after the refrigerator 100 is turned on in S203, any one of the room temperature change amounts ΔTRa, ΔTRb, ΔTRc is set to one set value ΔTR_set. If all of the indoor temperature changes ΔTRa, ΔTRb, ΔTRc are smaller than all the set values ΔTRa_set, ΔTRb_set, ΔTRc_set, the process proceeds to S204. If there is no small item, the process may proceed to S205. The same applies to the case where the rapid cooling operation is performed in a plurality of storage rooms that are not all.

  In S205, the control unit 91 sets the room temperature TRa, TRb, TRc detected by the room temperature sensors 31a, 31b, 31c of the storage room being rapidly cooled to the preset values TRa_set, TRb_set, It is determined whether or not it is smaller than TRc_set. If it is smaller, the flow returns to the rapid cooling stability determination flow. If it is not smaller, the flow returns to S202. Note that the setting values TRa_set, TRb_set, TRc_set in S205 may be equal to or different from the setting values TRa_set, TRb_set, TRc_set in S103.

Next, a control flow during stable operation of the refrigerator according to Embodiment 1 will be described.
FIG. 6 is a diagram for explaining a stable operation control flow of the refrigerator according to the first embodiment. FIG. 7 is a diagram showing the relationship between the temperature difference between the evaporation temperature and the target evaporation temperature and the compressor rotation speed in the refrigerator according to the first embodiment. FIG. 8 is a diagram illustrating the relationship between the temperature difference between the room temperature and the target room temperature and the damper opening degree of the refrigerator according to the first embodiment.

  As shown in FIG. 6, the controller 91 determines in S301 whether or not it is immediately after the start of stable operation. If it is immediately after, the process proceeds to S302. If not, the process proceeds to S303. .

  In S <b> 302, the control unit 91 outputs the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 from the target evaporation temperature output unit 96 to the compressor rotation number control unit 92. The compressor rotation speed FComp_1 is made to coincide with the target evaporation temperature TE_t to be controlled. Further, the damper opening degree CPulse of the dampers 22a, 22b, and 22c corresponding to the storage chamber to be stably operated by the damper opening degree control unit 93 is detected by the indoor temperature sensors 31a, 31b, and 31c of the storage chamber. , TRb, TRc and the target indoor temperature TRa_t, TRb_t, TRc_t of the storage chamber output from the target indoor temperature output unit 95, and control is performed so that the damper opening CPulse_1 corresponds to the temperature difference ΔTR. Further, the fan rotation speed controller 94 sets the fan rotation speed FFan of the fan 21 to the fan rotation speed FFan_1 corresponding to the compressor rotation speed FComp_1, that is, the relationship with the compressor rotation speed FComp_1 is shown in FIG. Is controlled so that the fan rotational speed FFan_1 becomes the proportional relationship shown in FIG. Then, the process proceeds to S303.

  For example, the control unit 91 has a relationship between the compressor rotational speed FComp and the temperature difference ΔTE between the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 and the target evaporation temperature TE_t output from the target evaporation temperature output unit 96. 7, the compressor rotational speed FComp_1 is set to a value satisfying the temperature difference ΔTE_1 at that time and the proportional relationship. Further, the damper opening degree CPulse_1 is set to a value that satisfies the relationship between the temperature difference ΔTR_1 at that time and the linear function shown in FIG. When stable operation is performed in a plurality of storage rooms, the damper opening CPulse_1 may be set to a different value for each storage room, or may be set to the same value.

  In S303, the control unit 91 outputs the room temperature TRa, TRb, TRc detected by the room temperature sensors 31a, 31b, 31c of the storage room to be stably operated, from the target room temperature output unit 95. It is determined whether the temperature is lower than the room temperatures TRa_t, TRb_t, and TRc_t. If it is smaller, in S304, the damper opening degree controller 93 reduces the damper opening degree CPulse of the dampers 22a, 22b, 22c corresponding to the storage room in order to suppress the excess of the cooling air supplied to the storage room. The process proceeds to S305, and if not, the process proceeds to S305.

  In S305, the control unit 91 detects the room temperature TRa, TRb, TRc detected by the room temperature sensors 31a, 31b, 31c of the storage room to be stably operated, and outputs the target of the storage room from the target room temperature output unit 95. It is determined whether the temperature is higher than the room temperatures TRa_t, TRb_t, and TRc_t. If larger, in S306, the damper opening control unit 93 increases the damper opening CPulse of the dampers 22a, 22b, and 22c corresponding to the storage room in order to suppress the shortage of cooling air supplied to the storage room. Then, the process proceeds to S307. If not, the process proceeds to S307.

  In step S <b> 307, the control unit 91 outputs the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 from the target evaporation temperature output unit 96 to the compressor rotation number control unit 92. The compressor rotation speed FComp is made to coincide with the target evaporation temperature TE_t to be controlled. Further, the fan rotation speed control unit 94 causes the fan rotation speed FFan of the fan 21 to increase or decrease in conjunction with the compressor rotation speed FComp, that is, for example, the relationship with the compressor rotation speed FComp at that time is shown in FIG. The fan rotation speed FFan having a proportional relationship shown in FIG.

  For example, the control unit 91 has a relationship between the compressor rotational speed FComp and the temperature difference ΔTE between the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 and the target evaporation temperature TE_t output from the target evaporation temperature output unit 96. The compressor rotational speed FComp is adjusted to a value satisfying the temperature difference ΔTE and the proportional relation at that time.

  In S303 to S306, the room temperature TRa, TRb, TRc detected by the room temperature sensors 31a, 31b, 31c of the storage room to be stably operated, and the target room of the storage room output from the target room temperature output unit 95. Depending on the magnitude of the temperature difference ΔTR between the temperatures TRa_t, TRb_t, and TRc_t, the amount of decrease or increase in the damper opening CPulse of the dampers 22a, 22b, and 22c corresponding to the storage chamber may be changed. That is, the damper opening degree CPulse of the dampers 22a, 22b, and 22c corresponding to the storage room to be stably operated is determined by using the indoor temperatures TRa, TRb, and TRc detected by the indoor temperature sensors 31a, 31b, and 31c of the storage room, What is necessary is just to adjust to the damper opening degree CPulse close | similar to the target room temperature TRa_t, TRb_t, TRc_t of the storage room output from the temperature output part 95. FIG.

  In S307, similarly to S303 to S306, the compressor rotation speed FComp is a temperature between the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 and the target evaporation temperature TE_t output from the target evaporation temperature output unit 96. Regardless of the magnitude of the difference ΔTE, it may be increased or decreased by a certain amount. That is, the compressor rotation speed FComp is adjusted to the compressor rotation speed FComp that brings the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 closer to the target evaporation temperature TE_t output from the target evaporation temperature output unit 96. That's fine.

(Function of refrigerator)
The operation of the refrigerator according to Embodiment 1 will be described.
In the refrigerator 100, the control unit 91 changes the compressor rotation speed FComp to the compressor rotation speed FComp that brings the evaporation temperature TE of the refrigerant in the refrigerant circulation circuit 11 closer to the target evaporation temperature TE_t, and the damper opening CPulse is The room temperature TRa, TRb, TRc of the storage room is changed to the damper opening CPulse that approaches the target room temperature TRa_t, TRb_t, TRc_t. Therefore, the compressor 12 is stopped depending on the room temperature TRa, TRb, TRc of the storage room, and the occurrence of On-Off loss is suppressed, and the operation efficiency of the refrigerator 100 is improved. Moreover, since fluctuations in the room temperatures TRa, TRb, and TRc of the storage room are suppressed by adjusting the damper opening CPulse, the operation efficiency of the refrigerator 100 is improved and the quality maintenance performance of the food stored in the refrigerator 100 is improved. Improvement is compatible.

  In the refrigerator 100, the target evaporation temperature TE_t is set according to the target indoor temperatures TRa_t, TRb_t, and TRc_t. Therefore, depending on the room temperature TRa, TRb, TRc of the storage room, it is possible to set the compressor rotational speed FComp to a value corresponding to the required thermal load while suppressing the fluctuation of the compressor rotational speed FComp. The operation efficiency of the refrigerator 100 is further improved.

  In the refrigerator 100, the target evaporation temperature TE_t is set according to the target indoor temperature TRb_t of the coldest storage room. Therefore, it is suppressed that the compressor rotation speed FComp is insufficient and the quality of food stored in the refrigerator 100 is deteriorated.

  Further, in the refrigerator 100, the amount of cool air blown out from the cooling chamber 5 to each storage chamber is adjusted by controlling the damper opening degree CPulse. Therefore, since fluctuations in the room temperature TRa, TRb, TRc of the storage room can be suppressed while reducing the influence on the operation of the refrigerant circulation circuit 11, it is possible to improve the operating efficiency of the refrigerator 100 and The balance between improving the quality maintenance performance of stored foods and the like is ensured.

  In refrigerator 100, control part 91 changes fan number of rotations FFan according to compressor number of rotations FComp. Therefore, the fan rotation speed FFan can be set to a value according to the necessary heat load, and the operation efficiency of the refrigerator 100 is further improved.

  In the refrigerator 100, the stable operation and the rapid cooling operation can be switched, and the control unit 91 particularly sets the compressor rotation speed FComp and the refrigerant evaporation temperature TE in the refrigerant circulation circuit 11 to the target evaporation temperature during the stable operation. The compressor rotational speed FComp that approaches TE_t is changed, and the damper opening CPulse is changed to the damper opening CPulse that brings the storage room temperatures TRa, TRb, and TRc closer to the target indoor temperatures TRa_t, TRb_t, and TRc_t. Therefore, without sacrificing the cooling performance of the refrigerator 100, it is possible to achieve both the improvement of the operation efficiency of the refrigerator 100 and the improvement of the quality maintenance performance of the food stored in the refrigerator 100.

Embodiment 2. FIG.
Hereinafter, the refrigerator according to Embodiment 2 will be described.
In addition, the description which overlaps with the refrigerator which concerns on Embodiment 1 is simplified or abbreviate | omitted suitably.
<Fridge configuration>
Below, the structure of the refrigerator which concerns on Embodiment 2 is demonstrated.
(Outline configuration)
First, a schematic configuration of the refrigerator according to the second embodiment will be described.
FIG. 9 is a diagram for explaining a schematic configuration of the refrigerator according to the second embodiment.

  As shown in FIG. 9, the refrigerator 100 includes a fan 21a that generates cold air blown from the cooling chamber 5 through the air passage 7a to the refrigerator compartment 2, and the freezer compartment 3 from the cooling chamber 5 through the air passage 7b. And a fan 21c that generates cool air blown from the cooling chamber 5 to the vegetable compartment 4 via the air passage 7c. The controller 91 is connected to the compressor 12, the decompressor 14, fans 21a, 21b, 21c, and the like. The fans 21a, 21b, and 21c are variable in rotation speed. The fans 21a, 21b, and 21c correspond to the “air volume adjusting unit” in the present invention.

(Configuration of control unit)
Next, the structure of the control part of the refrigerator which concerns on Embodiment 2 is demonstrated.
FIG. 10 is a diagram for explaining the configuration of the control unit of the refrigerator according to the second embodiment.

  As shown in FIG. 10, the control unit 91 includes a compressor rotation speed control unit 92 and a fan rotation speed control unit 94. The compressor rotation speed control unit 92 controls the rotation speed of the compressor 12. The fan rotation speed control unit 94 controls the rotation speeds of the fans 21a, 21b, and 21c.

<Operation of refrigerator>
Below, operation | movement of the refrigerator which concerns on Embodiment 2 is demonstrated.
(Operation of control unit)
Operation | movement of the control part of the refrigerator which concerns on Embodiment 2 is demonstrated.
First, the control flow during the rapid cooling operation of the refrigerator according to the second embodiment will be described.
FIG. 11 is a diagram for explaining a rapid cooling operation control flow of the refrigerator according to the second embodiment.

  As shown in FIG. 11, in S401, the control unit 91 causes the compressor rotation speed control unit 92 to change the compressor rotation speed FComp of the compressor 12 to the compressor rotation speed FComp of the compressor 12 during stable operation. Control is performed so that the compressor speed FComp_2 is higher than that of the compressor. Further, the fan rotation speed control unit 94 is controlled so that the fan rotation speed FFan of the fans 21a, 21b, and 21c corresponding to the storage room to be rapidly cooled becomes the maximum fan rotation speed FFan_max. Then, the process proceeds to S402.

  In S402, the controller 91 determines whether or not X minutes have elapsed after starting the rapid cooling operation. If X minutes have elapsed, the process proceeds to S403. In S403, the control unit 91 calculates the indoor temperature changes ΔTRa, ΔTRb, ΔTRc in X minutes of the indoor temperatures TRa, TRb, TRc detected by the indoor temperature sensors 31a, 31b, 31c of the storage room being rapidly cooled. It is calculated, and it is determined whether or not it is smaller than the set values ΔTRa_set, ΔTRb_set, ΔTRc_set set in advance for each storage room. If it is smaller, the process proceeds to S404, and if it is not smaller, the process proceeds to S405. In S404, the control unit 91 causes the compressor rotation speed control unit 92 to increase the compressor rotation speed FComp, and proceeds to S405.

  For example, when the rapid cooling operation is performed in all the storage rooms immediately after the refrigerator 100 is turned on in S403, any one of the room temperature change amounts ΔTRa, ΔTRb, ΔTRc is set to one set value ΔTR_set. If all of the indoor temperature changes ΔTRa, ΔTRb, ΔTRc are compared with all the set values ΔTRa_set, ΔTRb_set, ΔTRc_set, and one or more is small, the process proceeds to S404. If there is no small item, the process may proceed to S405. The same applies to the case where the rapid cooling operation is performed in a plurality of storage rooms that are not all.

  In S405, the control unit 91 sets the room temperature TRa, TRb, TRc detected by the room temperature sensors 31a, 31b, 31c of the storage room being rapidly cooled to the preset values TRa_set, TRb_set, It is determined whether or not it is smaller than TRc_set. If it is smaller, the process proceeds to the rapid cooling stability determination flow. If it is not smaller, the process returns to S402. Note that the setting values TRa_set, TRb_set, TRc_set in S405 may be equal to or different from the setting values TRa_set, TRb_set, TRc_set in S103.

Next, a control flow during stable operation of the refrigerator according to the second embodiment will be described.
FIG. 12 is a diagram for explaining a stable operation control flow of the refrigerator according to the second embodiment. FIG. 13 is a diagram showing the relationship between the temperature difference between the room temperature and the target room temperature and the fan rotation speed in the refrigerator according to the second embodiment.

  As shown in FIG. 12, the control unit 91 determines in S501 whether or not it is immediately after the start of stable operation. If it is immediately after, the process proceeds to S502, and if not, the process proceeds to S503. .

  In step S <b> 502, the control unit 91 outputs the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 from the target evaporation temperature output unit 96 to the compressor rotation number control unit 92. The compressor rotation speed FComp_1 is made to coincide with the target evaporation temperature TE_t to be controlled. Further, the fan rotation speed controller 94 detects the fan rotation speed FFan of the fans 21a, 21b, 21c corresponding to the storage chamber to be stably operated by the indoor temperature sensors 31a, 31b, 31c of the storage chamber. , TRb, TRc and the target room temperature TRa_t, TRb_t, TRc_t of the storage room output from the target room temperature output unit 95 are controlled so that the fan rotation speed FFan_1 corresponds to the temperature difference ΔTR. Then, the process proceeds to S503.

  For example, the control unit 91 has a relationship between the compressor rotational speed FComp and the temperature difference ΔTE between the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 and the target evaporation temperature TE_t output from the target evaporation temperature output unit 96. 7, the compressor rotational speed FComp_1 is set to a value satisfying the temperature difference ΔTE_1 at that time and the proportional relationship. Further, the fan rotation speed FFan_1 is set to a value satisfying the relationship between the temperature difference ΔTR_1 at that time and the linear function shown in FIG. When stable operation is performed in a plurality of storage rooms, fan rotation speed FFan_1 may be set to a different value for each storage room, or may be set to the same value.

  In S503, the control unit 91 outputs the room temperature TRa, TRb, TRc detected by the room temperature sensors 31a, 31b, 31c of the storage room to be stably operated, from the target room temperature output unit 95, and the target of the storage room. It is determined whether the temperature is lower than the room temperatures TRa_t, TRb_t, and TRc_t. If it is smaller, in S504, the fan rotation speed controller 94 reduces the fan rotation speed FFan of the fans 21a, 21b, and 21c corresponding to the storage chamber in order to suppress excess cooling air supplied to the storage chamber. Then, the process proceeds to S505. If not, the process proceeds to S505.

  In step S <b> 505, the control unit 91 outputs the room temperature TRa, TRb, TRc detected by the room temperature sensors 31 a, 31 b, 31 c of the storage room to be stably operated, from the target room temperature output unit 95. It is determined whether the temperature is higher than the room temperatures TRa_t, TRb_t, and TRc_t. If larger, in S506, the fan rotation speed controller 94 increases the fan rotation speed FFan of the fans 21a, 21b, and 21c corresponding to the storage room in order to suppress the shortage of cooling air supplied to the storage room. The process proceeds to S507, and if not, the process proceeds to S507.

  In step S <b> 507, the control unit 91 outputs the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 from the target evaporation temperature output unit 96 to the compressor rotation number control unit 92. The compressor rotation speed FComp is made to coincide with the target evaporation temperature TE_t to be controlled.

  For example, the control unit 91 has a relationship between the compressor rotational speed FComp and the temperature difference ΔTE between the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 and the target evaporation temperature TE_t output from the target evaporation temperature output unit 96. The compressor rotational speed FComp is adjusted to a value satisfying the temperature difference ΔTE and the proportional relation at that time.

  In S503 to S506, the room temperature TRa, TRb, TRc detected by the room temperature sensors 31a, 31b, 31c of the storage room to be stably operated, and the target room of the storage room output from the target room temperature output unit 95 are detected. Depending on the magnitude of the temperature difference ΔTR between the temperatures TRa_t, TRb_t, and TRc_t, the amount of decrease or increase in the fan rotation speed FFan of the fans 21a, 21b, and 21c corresponding to the storage chamber may be changed. That is, the fan rotation speed FFan of the fans 21a, 21b, and 21c corresponding to the storage room to be stably operated is determined by using the indoor temperatures TRa, TRb, and TRc detected by the indoor temperature sensors 31a, 31b, and 31c of the storage room. What is necessary is just to adjust to the fan rotation speed FFan which approaches the target room temperature TRa_t, TRb_t, TRc_t of the storage room output from the temperature output part 95.

  In S507, similarly to S503 to S506, the compressor rotation speed FComp is a temperature between the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 and the target evaporation temperature TE_t output from the target evaporation temperature output unit 96. Regardless of the magnitude of the difference ΔTE, it may be increased or decreased by a certain amount. That is, the compressor rotation speed FComp is adjusted to the compressor rotation speed FComp that brings the refrigerant evaporation temperature TE detected by the evaporation temperature sensor 33 closer to the target evaporation temperature TE_t output from the target evaporation temperature output unit 96. That's fine.

(Function of refrigerator)
The effect | action of the refrigerator which concerns on Embodiment 2 is demonstrated.
In the refrigerator 100, the control unit 91 changes the compressor rotation speed FComp to the compressor rotation speed FComp that brings the evaporation temperature TE of the refrigerant in the refrigerant circulation circuit 11 close to the target evaporation temperature TE_t, and the fan rotation speed FFan is The room temperature TRa, TRb, TRc of the storage room is changed to the fan rotation speed FFan that approaches the target room temperature TRa_t, TRb_t, TRc_t. Therefore, the compressor 12 is stopped depending on the room temperature TRa, TRb, TRc of the storage room, and the occurrence of On-Off loss is suppressed, and the operation efficiency of the refrigerator 100 is improved. Moreover, since fluctuations in the room temperature TRa, TRb, TRc of the storage room are suppressed by adjusting the fan rotation speed FFan, improvement in the operating efficiency of the refrigerator 100 and quality maintenance performance of food stored in the refrigerator 100 can be achieved. Improvement is compatible.

  Further, in the refrigerator 100, the amount of cool air blown from the cooling chamber 5 to each storage chamber is adjusted by controlling the fan rotation speed FFan. Therefore, the certainty of suppressing the fluctuations in the room temperature TRa, TRb, TRc of the storage room is improved, and the quality maintenance performance of the food stored in the refrigerator 100 is improved.

  As mentioned above, although Embodiment 1 and Embodiment 2 were demonstrated, this invention is not limited to description of each embodiment. For example, all or some of the embodiments can be combined.

  DESCRIPTION OF SYMBOLS 1 Casing, 2 Refrigeration room, 3 Freezing room, 4 Vegetable room, 5 Cooling room, 6a, 6b, 6c Door, 7a, 7b, 7c Air path, 11 Refrigerant circulation circuit, 12 Compressor, 13 Condenser, 14 Decompressor , 15 Evaporator, 21, 21a, 21b, 21c Fan, 22a, 22b, 22c Damper, 31a, 31b, 31c Indoor temperature sensor, 32a, 32b, 32c Door open / close sensor, 33 Evaporation temperature sensor, 91 Control unit, 92 Compression Machine speed controller, 93 damper opening controller, 94 fan speed controller, 95 target room temperature output unit, 96 target evaporation temperature output unit, 97 rapid cooling stability determination unit, 100 refrigerator.

Claims (4)

Multiple storage rooms;
A refrigerant circulation circuit in which a compressor, a condenser, a decompressor, and an evaporator are connected by piping;
A cooling chamber in which the evaporator is disposed;
An air volume adjusting unit that adjusts an air volume of cold air blown from the cooling chamber to the plurality of storage chambers;
A control unit for controlling the operation of the compressor and the air volume adjusting unit;
With
The air volume adjuster is
A fan for generating the cold air;
A plurality of opening degree adjustment parts for adjusting the opening degree of the cold air passage position,
The controller is
Controlling the rotational speed of the compressor to be greater than 0 in proportion to the temperature difference between the refrigerant evaporation temperature and the target evaporation temperature in the refrigerant circuit ;
The number of rotations of the fan is changed according to the number of rotations of the compressor, and the opening degree of the plurality of opening degree adjusting units is controlled, so that the air volume in each of the storage rooms Change the air volume so that the temperature approaches the target room temperature.
A refrigerator characterized by that. The target evaporation temperature is set according to the target room temperature.
The refrigerator according to claim 1. The target evaporation temperature is set according to the target room temperature of the coldest storage room,
The refrigerator according to claim 1 or 2 characterized by things. A plurality of storage chambers, a refrigerant circulation circuit in which a compressor, a condenser, a decompressor, and an evaporator are connected by piping; a cooling chamber in which the evaporator is disposed; and the plurality of storage chambers from the cooling chamber An air volume adjusting unit that adjusts the air volume of the cool air blown to the fan, wherein the air volume adjusting unit includes a fan that generates the cold air, and a plurality of opening degree adjusting units that adjust the opening degree of the passage position of the cold air. A method of controlling a refrigerator comprising:
Controlling the rotational speed of the compressor to be greater than 0 in proportion to the temperature difference between the refrigerant evaporation temperature and the target evaporation temperature in the refrigerant circuit ;
Changing the rotational speed of the fan according to the rotational speed of the compressor; and
Controlling the opening degree of the plurality of opening adjustment units, and changing the air volume of each storage chamber to an air volume in which the indoor temperature of each storage chamber approaches the target indoor temperature,
A control method for a refrigerator.

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