JP2011080689A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of preventing dew formation without using a heater in a refrigerating space even when operated by "strong" operating strength. <P>SOLUTION: A control part 66 of the refrigerator 10 controls a refrigerating cycle so as to reach each first target temperature corresponding to set operating strength. When the operating strength is set "strong" and detected outside air temperature is lower than a predetermined temperature, the control part 66 controls the refrigerating cycle so that interior temperature reaches a second target temperature set higher than the first target temperature corresponding to the "strong" operating strength. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a refrigerator.

  Conventionally, when the refrigerator is operated at a high strength, dew condensation may occur on the bottom of the vegetable room or the refrigerator room due to excessive cooling of the freezer room. Therefore, in Patent Document 1, a heater is provided in a vegetable room or a refrigerator room, and when the operating strength is “strong”, the heater is operated to prevent condensation in the vegetable room or the refrigerator room.

JP-A-6-82140

  However, when a heater is provided in a vegetable room or a refrigerated room as in Patent Document 1, there is a problem that the cost increases and extra power is consumed by energizing the heater.

  Therefore, in view of the above problems, the present invention provides a refrigerator capable of preventing dew condensation without using a heater in a refrigerated space even when the operation strength is “high”.

  The present invention includes a refrigeration space provided inside a cabinet, a refrigeration space provided inside the cabinet via the refrigeration space and a heat insulating partition wall, a refrigeration cycle for cooling the refrigeration space and the refrigeration space, Operation means capable of setting the operation strength of the refrigeration cycle from strong to weak in multiple steps or steplessly, outside air temperature detecting means for detecting the outside air temperature outside the cabinet, and the inside of each of the refrigeration space and the freezing space The refrigeration cycle is controlled so that the temperature reaches each first target temperature corresponding to the set operating intensity, the operating intensity is set to be strong, and the detected outside air temperature is a predetermined temperature. Control means for controlling the refrigeration cycle so that the internal temperature reaches a second target temperature higher than the first target temperature corresponding to the strength when the temperature is lower A refrigerator, characterized in that it comprises a.

  According to the present invention, it is possible to prevent dew condensation without using a heater in a refrigerated space even when the operation strength is high.

It is a longitudinal cross-sectional view of the refrigerator which shows one Example of this invention. It is a block diagram of a refrigerating cycle. It is a block diagram of a refrigerator. It is a flowchart which shows control of a refrigerator.

  Hereinafter, the refrigerator 10 of one Example of this invention is demonstrated based on FIGS.

(1) Structure of the refrigerator 10 FIG. 1 is a longitudinal sectional view of the refrigerator 10 of the present embodiment. The structure of the refrigerator 10 is demonstrated based on this FIG.

  The cabinet 12 of the refrigerator 10 is divided into a refrigerator compartment 14, a vegetable compartment 16, an ice making compartment 18, and a freezer compartment 20 from the top. The refrigerator compartment 14 and the vegetable compartment 16 constitute a refrigerator compartment 15, A freezing space 21 is constituted by the freezer compartment 20. A heat insulating partition wall 22 is provided between the refrigerated space 15 and the refrigerated space 21, that is, between the vegetable compartment 16 and the ice making compartment 18.

  The refrigerator compartment 14 is provided with a hinged door 14a, and the vegetable compartment 16, the ice making compartment 18 and the freezer compartment 20 are provided with drawer type doors 16a, 18a and 20a, respectively. The vegetable compartment 16 is provided with a vegetable container 16b that can be pulled forward together with a drawer-type door 16a. The vegetable container 16 b is placed on the bottom surface of the vegetable chamber 16, and there is no gap between the vegetable container 16 b and the bottom surface of the vegetable chamber 16.

  A machine room 24 is provided at the bottom of the back surface of the cabinet 12, that is, behind the vegetable room 16. Inside the machine room 24, a compressor 26, an evaporating dish 28, and the like are arranged.

  A refrigeration evaporator (hereinafter referred to as “R EVA”) 30 for cooling the refrigeration space 15 is disposed on the back of the refrigerator compartment 14 and the vegetable compartment 16, and a refrigeration blower (hereinafter referred to as “R”) is disposed below the R evaporator 30. (Referred to as a fan) 31 is provided.

  A freezing evaporator (hereinafter referred to as F-eva) 32 is disposed on the back of the ice making chamber 18 and the freezing chamber 20, and a freezing blower (hereinafter referred to as F-fan) 34 is provided above the F-evapor 32. Yes.

  A control unit 66 that is a microcomputer is disposed on the rear surface of the cabinet 12.

  An operation panel 72 having a display unit 68 and an operation unit 70 is provided on the front surface of the door 14 a of the refrigerator compartment 14. Inside the operation panel 72, an outside air temperature sensor 74 for detecting the outside air temperature of the refrigerator 10 is provided. The operation unit 70 is provided with a dial for setting the operating intensity of the refrigerator 10, and can be set in three stages of “strong”, “medium”, and “weak”. In addition, the display unit 68 displays the current operating intensity setting state and other states of the refrigerator 10.

  An automatic ice making device 36 is provided inside the ice making chamber 18.

(2) Configuration of Refrigeration Cycle 38 Next, the configuration of the refrigeration cycle 38 of the refrigerator 10 of the present embodiment will be described with reference to FIG. FIG. 2 is a configuration diagram of the refrigeration cycle 38.

  As shown in FIG. 2, the discharge pipe of the compressor 26 is connected to the evaporation pipe 42 via the muffler 40. The evaporation pipe 42 is disposed inside the evaporation dish 28 and forcibly evaporates the defrost water.

  The discharge side of the evaporation pipe 42 is connected to a condenser 44, and the discharge side of the condenser 44 is connected to a heat radiating pipe 46 disposed inside the cabinet 12.

  The discharge side of the heat radiating pipe 46 is connected to the inlet of the three-way valve 50 through a dryer 48. A refrigeration main capillary tube 52 is connected to the first outlet of the three-way valve 50, and the R eva 30 is connected to the refrigeration main capillary tube 52. On the other hand, the freezing main capillary tube 54 is connected to the second outlet of the three-way valve 50, and the F EVA 32 is connected to the freezing main capillary tube 54. As described above, the R fan 31 is provided in the vicinity of the R EVA 30, and the F fan 34 is provided in the vicinity of the F EVA 32.

  A refrigeration accumulator 56 and a refrigeration suction pipe 58 are connected to the outlet side of the R evaporator 30 and further connected to a check valve 64. On the other hand, the refrigeration accumulator 60 and the refrigeration suction pipe 62 are also connected to the outlet side of the F-evapor 32 and connected to the check valve 64 described above.

  The outlet side of the check valve 64 is connected to the suction pipe of the compressor 26.

(3) Electrical configuration of refrigerator 10 Next, the electrical configuration of the refrigerator 10 will be described with reference to FIG. FIG. 3 is a block diagram of the refrigerator 10.

  As shown in FIG. 3, the outside air temperature sensor 74, the operation unit 70, the display unit 68, the compressor 26, the F fan 34, the R fan 31, and the automatic ice making device 36 are connected to the control unit 66. Moreover, the internal temperature sensor 76 provided in the refrigerator compartment 14, the vegetable compartment 16, and the freezer compartment 20 is also connected.

(4) Operation state of refrigerator 10 Next, the operation process of the refrigerator 10 of the present embodiment will be described with reference to FIG. FIG. 4 is a flowchart showing an operation process of the refrigerator 10.

  In step 1, the control unit 66 determines whether or not the driving intensity is set to “strong” in the operation unit 70, and if it is set to “strong”, the process proceeds to step 3, and if not set, the step proceeds to step 3. Proceed to 2.

  In step 2, the control unit 66 operates the refrigerator 10 in the normal mode. This normal mode refers to the compressor 26 so that the internal temperature detected by the internal temperature sensor 76 provided in the refrigerator compartment 14, the vegetable compartment 16, and the freezer compartment 20 reaches the first target temperature of each room. , R fan 31 and F fan 34 are controlled. For example, the first target temperature of the freezer compartment 20 corresponding to the “low” operating intensity is −18 ° C., and the first target temperature of the freezer compartment 20 corresponding to “medium” is −20 ° C., corresponding to “strong”. The first target temperature of the freezer compartment 20 is −22 ° C. Then, the control unit 66 rotates the compressor 26, the R fan 31, and the F fan 34 so that the internal temperature of the freezer compartment 20 reaches the first target temperature corresponding to the operation intensity “weak” or “medium”. Control the number. When the internal temperature of the freezer compartment 20 reaches the first target temperature, the compressor 26, the R fan 31 and the F fan 34 are stopped. When the inside temperature of the refrigerator compartment 14 or the vegetable compartment 16 rises above the first target temperature of the refrigerator compartment 14, only the R fan 31 is rotated.

  In step 3, when the operating intensity in the operation unit 70 is set to “strong” and the outside air temperature detected by the controller 66 by the outside air temperature sensor 74 is lower than a predetermined temperature (for example, 10 ° C.), step 4 is performed. If it is higher, go to Step 5.

  In step 4, since the outside air temperature is 10 ° C. or less, the control unit 66 sets the rotation speed of the F fan 34 to “medium” even if the operation intensity is “strong”, and returns to step 1. The controller 66 sets the rotation speed of the F fan 34 to “medium”, and the internal temperature of the freezer compartment 20 is higher than the first target temperature (−22 ° C.) of the freezer compartment 20 (for example, the second target temperature). -18 ° C).

  In step 5, the control unit 66 sets the rotation speed of the F fan 34 to “strong” in response to the outside air temperature being 10 ° C. or higher and the operating intensity “strong”, and the process returns to step 1. That is, the control unit 66 rotates the F fan 34 at the “strong” rotational speed, and the internal temperature of the freezer compartment 20 reaches the first target temperature (−22 ° C.) corresponding to the operating intensity “strong”. To control.

(5) Effect With the refrigerator 10 of the present embodiment, in the heat insulating partition wall 22 that forms the boundary between the refrigerated space 21 and the refrigerated space 15, the refrigeration of the ice making room 18 and the freezing room 20 is performed when the outside air temperature is low. Since the space 21 is not strongly cooled, it is difficult for condensation to occur on the refrigerated space 15 side of the heat insulating partition wall 22, and it is not necessary to provide a conventional dew condensation prevention heater on the heat insulating partition wall 22. In order to reliably prevent dew condensation, a dew condensation prevention heater may be provided. In this case, the heat generation amount of the dew condensation prevention heater can be suppressed as compared with the conventional case.

  Conventionally, in order to prevent condensation in the vegetable compartment 16, a gap through which cool air flows is provided between the vegetable container 16 b and the bottom of the vegetable compartment 16. However, in this embodiment, condensation occurs as described above. Therefore, it is not necessary to provide this flow path. Therefore, the volume of the vegetable container 16b can be increased, the amount of cold air flowing through the vegetable compartment 16 can be reduced, and the inside of the vegetable container 16b can be kept at high humidity.

(6) Modification Examples The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof.

  In the above embodiment, when the operating intensity is “strong” and the outside air temperature is low, the rotation speed of the F fan 34 is set to “medium”, the operating intensity is “strong”, and the outside air temperature is When it is high, the rotation speed of the F fan 34 is set to “strong”. However, the control method is not limited to this, and for example, there is the following control method.

  As a first control method of the modified example, when the outside air temperature is low, the F fan 34 may be rotated at a rotation speed of “weak” instead of “medium”.

  As a second control method, when the outside air temperature is low, the compressor 26 may be stopped and only the R fan 31 may be rotated.

  As a third control method, the compressor 26 may be operated with the rotation speed of the compressor 26 being “medium” or “low”.

  In the above embodiment, the setting of the operation intensity of the operation unit 70 has three levels of “strong”, “medium”, and “weak”. It may be the above.

  Further, it may be a method of adjusting the driving intensity steplessly like a volume instead of multiple steps. In this case, the control similar to the above-described embodiment is performed by setting a certain range as the “strong” range.

DESCRIPTION OF SYMBOLS 10 ... Refrigerator, 14 ... Cold room, 16 ... Vegetable room, 18 ... Ice making room, 20 ... Freezing room, 22 ... Thermal insulation partition wall, 26 ... Compressor, 30. ..R EVA, 31 ... R fan, 32 ... F EVA, 34 ... F fan, 66 ... control unit,
70 ... operation unit, 74 ... outside air temperature sensor

Claims (1)

A refrigerated space inside the cabinet;
A freezing space provided inside the cabinet via the refrigerated space and a heat insulating partition wall;
A refrigeration cycle for cooling the refrigerated space and the frozen space;
An operation means capable of setting the operation strength of the refrigeration cycle from strong to weak in multiple steps or steplessly;
An outside air temperature detecting means for detecting outside air temperature outside the cabinet;
The refrigeration cycle is controlled so that the respective internal temperatures of the refrigerated space and the refrigerated space reach the respective first target temperatures corresponding to the set operating strength, and the operating strength is set to be strong. And when the detected outside air temperature is lower than a predetermined temperature, the refrigeration cycle is controlled so that the internal temperature reaches a second target temperature higher than the first target temperature corresponding to the high temperature. Control means;
A refrigerator characterized by comprising:

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