JP6566736B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with a condensation prevention heater for preventing condensation.

  Patent Document 1 describes a refrigerator that can prevent condensation (with dew). In this refrigerator, a dew condensation heater (dew condensation prevention heater) for preventing dew condensation generated on the horizontal partition plate, the wall surface, and the door of the casing adjacent to the freezer compartment is arranged. And in the said refrigerator, the temperature sensor which measures a housing | casing surface temperature, and the humidity sensor which measures external air humidity are arrange | positioned in the vicinity of the hinge cover or board | substrate storage part of the upper part door of a refrigerator with which it is hard to produce dew. Then, the output of the dew-proof heater is calculated so that the horizontal partition plate does not condense according to the housing surface temperature and the outside air humidity detected by the temperature sensor and the humidity sensor, and the dew-proof heater is calculated based on the calculated output. By operating, condensation is prevented (dew-proof).

JP 10-339555 A (paragraph 0021)

  In the conventional refrigerator, the position where the temperature sensor and the humidity sensor are arranged is separated from the position of the horizontal partition plate where condensation is likely to occur. In addition, the refrigerator is often placed in a kitchen, and the humidity sensor may not be able to detect accurate humidity due to adhesion or deterioration of oil or the like. That is, when the temperature and humidity around the horizontal partition plate are separated from the casing surface temperature and the outside air humidity detected by the temperature sensor and the humidity sensor, dew condensation is caused when the dew-proof heater is operated with the calculated output. There is a risk that it cannot be prevented.

  Therefore, an object of the present invention is to provide a refrigerator in which an operator can change the output of a dew condensation prevention heater without excess or deficiency in order to prevent dew condensation.

  In order to achieve the above object, the present invention provides a temperature detector that detects the ambient temperature of the main body, a humidity detector that detects the ambient humidity of the main body, and a dew condensation prevention that heats part of the main body to prevent condensation. The dew condensation prevention heater is operated with an output based on the ambient temperature and ambient humidity of the main body, and the output can be changed as necessary, and the ambient temperature and the predetermined position of the main body can be changed. Provided is a refrigerator in which an output display which is a table showing a relationship between the ambient humidity and the output of the dew condensation prevention heater is arranged.

  According to this configuration, referring to the output display, the output of the dew condensation prevention heater can be changed based on the ambient temperature and the ambient humidity, and excessive (waste) power is generated while suppressing the occurrence of dew condensation. The output can be adjusted so that consumption can be reduced.

  In addition, since the output display is arranged on the main body, it is not necessary to prepare special materials or secure a connection to the Internet. Thus, the operator can easily change the dew condensation prevention heater to an appropriate output.

  In the above configuration, the output display may use an energization amount (energization rate) to the dew condensation prevention heater as an output of the dew condensation prevention heater.

  In the above configuration, the output display may use a voltage value of a signal output from the temperature sensor as information on the ambient temperature.

  In the above configuration, the output display may use a voltage value of a signal output from the humidity sensor as information on the ambient humidity.

  The said structure WHEREIN: The operation input part which receives operation input is provided, You may make it change the output of the said dew condensation prevention heater based on the operation input which the said operation input part received.

  The said structure WHEREIN: You may provide the display part which displays the output of the said dew condensation prevention heater.

  The said structure WHEREIN: The said display part may be able to display the said ambient temperature and the said ambient humidity.

  In the above configuration, when the operation input unit receives an operation input, the dew condensation prevention heater is driven with an output based on the operation input, and after a predetermined time has elapsed, the dew condensation is generated with an output based on the ambient temperature and the ambient humidity. The prevention heater may be driven.

  In the above configuration, the output based on the ambient temperature and the ambient humidity is acquired from the output display, and the output based on the operation input from the operation input unit is compared to calibrate the output for the ambient temperature and the ambient humidity. May be.

  According to the present invention, it is possible to provide a refrigerator in which an operator can change the output of the condensation prevention heater without excess or deficiency in order to prevent condensation.

It is sectional drawing seen from the front of an example of the refrigerator concerning this invention. It is sectional drawing cut | disconnected by the II-II line | wire shown in FIG. It is sectional drawing cut | disconnected by the III-III line | wire shown in FIG. It is a block diagram which shows the structure of the refrigerator shown in FIG. It is a figure which shows the state which opened the door of the refrigerator compartment. It is a figure which shows the state which closed the door of the refrigerator compartment. It is the perspective view which looked at the refrigerator concerning this invention from the top. It is an enlarged view of an example of the operation input part and display part with which the refrigerator concerning this invention was equipped. It is an output table which shows the output of ambient temperature and humidity, and a dew condensation prevention heater. It is a flowchart which shows the procedure which adjusts the output of a dew condensation prevention heater. It is a rear view of the other example of the refrigerator concerning this invention. It is a figure which shows the other example of an output table. It is a flowchart which shows operation | movement of the other example of the refrigerator concerning this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
Next, the refrigerator according to the present invention will be described with reference to the drawings. 1 is a cross-sectional view of an example of a refrigerator according to the present invention as viewed from the front, FIG. 2 is a cross-sectional view taken along line II-II shown in FIG. 1, and FIG. 3 is a line III-III shown in FIG. It is sectional drawing cut | disconnected by. In the following description, the position in FIG. 1 will be described as a reference, and when referring to the right or left, the state in FIG.

  The refrigerator Rf has a heat insulation box 100 filled with a foam heat insulating material. The refrigerator Rf includes a plurality of storage rooms by partitioning the inside of the heat insulating box 100 with a partition wall. A partition wall 101 that divides the inside of the heat insulating box 100 vertically is provided at an intermediate portion in the vertical direction. Moreover, the partition wall 102 which divides the inside of a lower space up and down is provided. And the partition wall 103 which divides | segments the upper space divided by the partition wall 102 into right and left is provided. Further, a partition wall 104 that divides the left space partitioned by the partition wall 103 into upper and lower portions is provided.

  Of the plurality of storage rooms of the refrigerator Rf, the storage room formed above the partition wall 101 is the refrigerator compartment 1. The storage room formed below the partition wall 102 is the lower freezing room 2. The lower storage room on the left space partitioned by the partition wall 103 is the upper freezing room 3, and the upper storage room is the ice making room 4 (ice storage part). Further, the storage room on the right side of the upper freezing room 3 and the ice making room 4 is a vegetable room 5.

  Note that the refrigeration room, the lower freezing room, the upper freezing room, the ice making room, and the vegetable room do not need to be in this order, and may be changed according to the use frequency, the amount of stored items, and the like. Moreover, you may provide the store room which stores a store thing at temperature other than these store rooms.

  The lower freezer compartment 2 and the upper freezer compartment 3 are storage compartments for storing a stored product in a frozen state (for example, storing at −18 ° C.). The ice making room 4 is a storage room for storing ice produced by an ice making device (not shown), and is maintained at the same temperature as the lower freezing room 2 and the upper freezing room 3.

  As shown in FIG. 2, an opening 105 is provided in the partition wall 102 so that the lower freezer compartment 2 and the upper freezer compartment 3 communicate with each other. Similarly, the partition wall 104 is provided with an opening 106 so that the upper freezing room 3 and the ice making room 4 communicate with each other. In the refrigerator Rf, the lower freezer room 2, the upper freezer room 3, and the ice making room 4 are one heat insulating area.

  And the refrigerator compartment 1 refrigerates and preserves the stored item at a temperature higher than the lower freezer compartment 2 and the upper freezer compartment 3 (for example, 3 ° C. to 5 ° C.), and the vegetable compartment 5 has a higher temperature than the refrigerator compartment 1 (for example, 7 to 8 ° C.) and store the stored items such as vegetables in a refrigerator. In addition, the temperature of each store room is not limited to this, It sets to the temperature which can suppress deterioration of the articles | goods stored in each store room. Further, the user may be able to set the temperature as required or according to his / her preference.

  The refrigerator compartment 1 is opened and closed by a pair of double doors 11 pivoted at the left and right ends. And the refrigerator compartment 1 is provided with a plurality of shelves 12 for partitioning the space up and down, and a plurality of pockets 13 are provided inside the door 11, such as seasonings, beverages, etc. It can store items that are vertically long and easily fall over.

  The lower freezer compartment 2, the upper freezer compartment 3, the ice making chamber 4 and the vegetable compartment 5 are provided with storage cases 22, 32, 42 and 52, respectively, and are opened and closed by integrally formed drawer type doors 21, 31, 41 and 51. The The lower freezer compartment 2 is provided with a sliding case 23 that is disposed on the upper portion of the storage case 22 so as to be slidable with respect to the storage case 22.

  The refrigerator Rf includes a cold air passage 6 and a cold air passage 7 that communicate with each other via a damper 71. The cold air passage 6 is provided on the back surface of the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4. The cool air flow path 7 is provided on the back side of the refrigerator compartment 1.

  In the cold air passage 6 and the cold air flow path 7, a freezer compartment fan 61 and a refrigerator compartment fan 72 for circulating cold air are arranged, respectively. Below the freezer compartment fan 61, an evaporator 62 that generates cool air is disposed. A defrost heater 63 for removing (defrosting) frost attached to the evaporator 62 is disposed below the evaporator 62.

  The cold air passage 6 has discharge ports 601, 602, and 603 that are openings for discharging cold air to the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4, and an opening that returns the cold air from the lower freezer compartment 2 to the cold air passage 6. And a certain return port 604. The cool air discharged from the discharge ports 601, 602, and 603 cools the lower freezer chamber 2, the upper freezer chamber 3, and the ice making chamber 4, respectively, and returns to the cool air passage 6 from the return port 604.

  Since the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4 are a single heat insulating region, only the discharge port 603 may be provided so that cold air may be blown onto the ice making chamber 4. By doing in this way, the cold air discharged from the discharge port 603 flows in the order of the ice making chamber 4, the upper freezer chamber 3, and the lower freezer chamber 2, and the cold air can be returned from the return port 604 to the cold air passage 6. The freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4 can be efficiently cooled. In addition, the ice making chamber 4 is upstream of the cold air flow path, and it is possible to maintain the temperatures of the upper freezing chamber 3 and the lower freezing chamber 2 with the cold air from the ice stored in the ice making chamber 4. It is possible to reduce.

  The cold air flow path 7 includes a plurality of discharge ports 701 that are openings for discharging cold air to the refrigerator compartment. The plurality of discharge ports 701 are provided at four locations so as to discharge cold air to the respective stages partitioned by the shelf of the refrigerator compartment 1. The partition wall 101 is provided with a communication passage 702 that allows the refrigerator compartment 1 and the vegetable compartment 5 to communicate with each other. The cold air is heated to take heat away from the stored items when flowing through the refrigerator compartment 1. Then, the heated cold air flows into the vegetable compartment 5 from the communication path 702. Therefore, the vegetable compartment 5 is maintained at a higher temperature than the refrigerator compartment 1. The cold air flowing through the vegetable compartment 5 returns to the cold air passage 6 through the return port 703. The return port 703 is provided on the lower side and the back side of the vegetable compartment 5.

  A machine room 10 is provided below the cold air passage 6 on the back of the lower refrigeration room 2, and a compressor 14 for operating a refrigeration cycle is installed inside the machine room 10. As the compressor 14 is driven, the refrigerant flows through a refrigerant pipe (not shown), and the evaporator 62 connected to the compressor 14 through the refrigerant pipe has a low temperature. In the machine room 10, a control board Bd including a control unit 200 to be described later is disposed. The machine room 10 is provided with a lid (not shown) that can be opened and closed on the back surface. By opening (removing) the lid, the inside of the machine room 10 (the compressor 14 and the control board Bd) can be accessed.

  In the evaporator 62, every time heat exchange is performed, moisture in the air condenses and adheres to the fins as frozen frost. When frost adheres, it becomes difficult for air to flow, so heat exchange cannot be performed and cooling efficiency is reduced. Therefore, a defrost heater 63 for removing (defrosting) frost attached to the evaporator 62 is disposed below the evaporator 62. The upper surface of the defrost heater 63 is covered with a heater cover 631. The heater cover 631 suppresses failure, breakage, and the like of the defrost heater 63 caused by the defrost water dripping onto the defrost heater 63.

  Next, the electrical configuration of the refrigerator Rf will be described. FIG. 4 is a block diagram showing the configuration of the refrigerator shown in FIG. As shown in FIG. 4, the refrigerator Rf includes a control unit 200 that controls the operation of each unit. The control unit 200 includes a compressor 14, a freezer compartment fan 61, a refrigerator compartment fan 72, a damper 71, a defrost heater 63, a dew condensation prevention heater 8, a freezer compartment temperature sensor S1, a refrigerator compartment temperature sensor S2, and an ambient temperature sensor S3 ( A temperature detection unit), an ambient humidity sensor S4 (humidity detection unit), an operation input unit Ip, and a display unit Dp are connected. The control unit 200 includes a time measuring unit 201 and a storage unit 202.

  The compressor 14, the freezer compartment fan 61, the refrigerator compartment fan 72, the damper 71, the defrost heater 63, and the dew condensation prevention heater 8 are operated by a control signal from the control unit 200. Further, the freezer compartment temperature sensor S1, the refrigerator compartment temperature sensor S2, the ambient temperature sensor S3, the ambient humidity sensor S4, and the operation unit Ip input signals to the control unit 200.

  The rotation speed of the compressor 14 is variably controlled by the control unit 200 (for example, inverter control). The timer 201 measures the elapsed time from an arbitrary time point. The storage unit 202 is a memory that stores information such as information sent to the control unit 200, information processed by the control unit 200, and information given to the control unit 200 in advance. Note that the timing unit 201 and the storage unit 202 are formed integrally with the control unit 200, but are not limited to this, and are provided independently of the control unit 200 and can be freely accessed by the control unit 200. It may be a configuration.

  The freezer temperature sensor S <b> 1 is disposed inside the lower freezer room 2, detects the temperature inside the lower freezer room 2, generates a freezer temperature signal, and sends it to the control unit 200. The refrigerating room temperature sensor S <b> 2 is disposed inside the refrigerating room 1, detects the temperature inside the refrigerating room 1, generates a refrigerating room temperature signal, and sends it to the control unit 200. In addition, freezer compartment temperature sensor S1 and refrigerator compartment temperature sensor S2 are sensors which detect temperature, For example, what used the thermistor can be mentioned, but it is not limited to this. In addition, the freezer temperature sensor S <b> 1 may detect the temperature of the upper freezer room 3 or the ice making room 4, which is the same heat insulation region as the lower freezer room 2.

  The detail of the refrigerator concerning this invention is demonstrated with reference to a new drawing. 5 is a view showing a state in which the door of the refrigerator compartment is opened, FIG. 6 is a view showing a state in which the door of the refrigerator compartment is closed, and FIG. 7 is a perspective view of the refrigerator according to the present invention as viewed from above. is there. As shown in FIG. 7, a hinge 110 that rotatably supports the pair of doors 11 and a hinge cover 111 that covers the hinge 110 are provided on the upper surface of the heat insulating box 100 of the refrigerator Rf. The hinges 110 are provided at the left and right end portions of the front surface of the heat insulating box 100. By providing the hinge cover 111, the hinge 110 can be hidden from view by the user, and the user or article can be prevented from touching. The hinge cover 111 is a box that is open on one side.

  In the refrigerator Rf, in a space surrounded by a hinge cover 111 that covers one of the hinges 110 provided on both the left and right sides (left side in FIG. 5), an ambient temperature sensor S3 that detects the ambient temperature of the refrigerator Rf, and the periphery of the refrigerator Rf An ambient humidity sensor S4 that detects the relative humidity is disposed. The hinge cover 111 is provided with a vent hole through which air can flow.

  The ambient temperature sensor S3 detects the ambient temperature of the refrigerator Rf (the temperature of the surface of the refrigerator Rf), generates an ambient temperature signal, and sends the ambient temperature signal to the control unit 200. The ambient humidity sensor S4 detects the ambient humidity around the refrigerator Rf, generates an ambient humidity signal, and sends it to the control unit 200.

  In the refrigerator Rf, the pair of doors 11 are frequently opened and closed. Further, since the pair of doors 11 are opened by rotating the intermediate portion around the left and right end portions as axes, outside air tends to flow in from the contact portion between the doors 11 in the intermediate portion, and condensation is likely to occur. Therefore, the dew condensation prevention heater 8 is provided so as to heat the mating portion (contact portion) of one door of the pair of doors 11 that open and close the front surface of the refrigerator compartment 1 with the other door (see FIG. 5). That is, in the refrigeration Rf shown in FIG. 5, a matching portion (contact) with the left door 11 (here, the left door 11 </ b> L) of the right door 11 (here, the right door 11 </ b> R) of the pair of doors 11. Inside the part), the temperature of the mating part is raised to prevent condensation. In addition, you may provide in the left side instead of the right side, and you may provide in both right and left.

  In the refrigerator Rf, the operation input unit Ip is provided on the front surface of the door 11 of the refrigerator compartment 1 (the right door 11R in FIG. 6). The operation input unit Ip is an input device that performs settings (for example, temperature setting) of the refrigerator compartment 1, the lower freezer compartment 2, the upper freezer compartment 3, the ice making compartment 4, and the vegetable compartment 5. Further, a display unit Dp for displaying the state of the refrigerator Rf (operating state and the like) is disposed near the operation input unit Ip (above the operation input unit Ip in FIG. 6).

  Here, the operation input unit Ip and the display unit Dp will be described with reference to the drawings. FIG. 8 is an enlarged view of an example of the operation input unit and the display unit provided in the refrigerator according to the present invention. As shown in FIG. 8, the operation input unit Ip includes four push button switches Ip1, Ip2, Ip3, and Ip4. In the following description, the four push button switches will be described as a first button switch Ip1, a second button switch Ip2, a third button switch Ip3, and a fourth button switch Ip4.

  In FIG. 8, the first button switch Ip1 arranged at the top is a menu button. In the refrigerator Rf, pressing the first button switch Ip1 starts accepting an operation input by the push button. The second button switch Ip2 arranged immediately below the first button switch Ip1 is a button for performing an operation input to move up. The third button switch Ip3 arranged immediately below the second button switch Ip2 is a button for performing an operation input to move downward. The fourth button switch Ip4 arranged at the bottom is a determination button, and is a button for determining (determining) an operation performed by the operation input unit Ip. In the present embodiment, the operation input unit Ip having four push buttons will be described as an example, but the present invention is not limited to this. Three or less may be sufficient and five or more may be sufficient. Moreover, the structure which can set temperature in steps with a notch etc. may be provided, and the structure which can be adjusted steplessly, such as a dial, may be provided.

  The display unit Dp includes four lamps (here, LED lamps) Dp1, Dp2, Dp3, and Dp4. In the following description, the first LED lamp Dp1, the second LED lamp Dp2, the third LED lamp Dp3, and the fourth LED lamp Dp4 will be described. In the present embodiment, each LED lamp of the display unit Dp is a lamp for indicating the operating state of the refrigerator Rf. Examples of the operating state include normal operation, rapid cooling operation, and power saving operation. In the present embodiment, the first operation M1, the second operation M2, the third operation M3, and the fourth operation M4 are set.

  The first LED lamp Dp1 arranged at the top in FIG. 8 is a lamp that indicates the first operation M1. That is, when the first LED lamp Dp1 is lit, the refrigerator Rf is in the first operation M1. Similarly, when the second LED lamp Dp2 is lit, the refrigerator Rf is in the second operation M2, and when the third LED lamp Dp3 is lit, the refrigerator Rf is in the third operation M3 and the fourth LED lamp Dp4 is lit. Sometimes the refrigerator Rf is in the fourth operation M4. In the present embodiment, the display unit Dp that indicates the state with four LED lamps is adopted, but the present invention is not limited to this, and more LED lamps may be provided, and characters to be displayed are displayed. A self-luminous display unit that shines may be employed. Moreover, another state, for example, the temperature (temperature range) of each storage room may be represented.

  The amount of dew condensation at the mating portion of the door 11 of the refrigerator compartment 1 of the refrigerator Rf is determined by the ambient temperature and ambient humidity. Therefore, the control unit 200 determines the output (heat generation amount) of the dew condensation prevention heater 8 based on the ambient temperature signal from the ambient temperature sensor S3 and the ambient humidity signal from the ambient humidity sensor S4. The control unit 200 acquires the output of the dew condensation prevention heater 8 based on the ambient temperature and ambient humidity from the table stored in the storage unit. FIG. 9 is an output table showing the ambient temperature and humidity and the output of the dew condensation prevention heater.

  The output table Tb1 shown in FIG. 9 shows the output of the dew condensation prevention heater 8 with respect to the ambient temperature and ambient humidity, and the horizontal is the ambient temperature distribution and the vertical is the ambient humidity distribution. For example, when the ambient temperature detected by the ambient temperature sensor S3 is greater than or equal to Th2 and less than Th3, and the ambient humidity detected by the ambient humidity sensor S4 is greater than or equal to Hm5 and less than Hm6, the dew condensation prevention heater is referred to with reference to the output table Tb1 shown in FIG. It can be seen that a suitable output of 8 is W35. In the example shown in FIG. 9, the temperature distribution is divided into five steps and the humidity distribution is divided into ten steps. However, the present invention is not limited to this, and the temperature distribution may be divided into more (smaller) steps.

  When the control unit 200 acquires the ambient temperature and ambient humidity data from the ambient temperature sensor S3 and the ambient humidity sensor S4, the control unit 200 refers to the output table Tbm1 (here, the same as the output table Tb1) stored in the storage unit 202. Then, the output of the dew condensation prevention heater 8 based on the ambient temperature and ambient humidity is acquired. In addition, when it becomes each value of output table Tb1 (ambient temperature, ambient humidity), it demonstrates as a step. Further, when the level goes up, it means that the dew condensation prevention condition becomes severe, that is, the ambient temperature and / or the ambient humidity moves to a higher one. For example, in the output table Tb1 as shown in FIG. 9, when the ambient humidity level increases, the lower level shifts, and when the ambient temperature level increases, the right level shifts.

  Here, the operation of the dew condensation prevention heater 8 will be described. The dew condensation prevention heater 8 adjusts the output based on the ON ratio when switching ON / OFF, that is, the duty ratio. The output of the dew condensation prevention heater 8 in the output table Tb1 indicates the output per cycle. For example, the output of the dew condensation prevention heater 8 is 10 W, the cycle is 100 seconds, and the output described in the output table Tb1 is 4 W. The dew condensation prevention heater 8 is turned on for 40 seconds in one cycle of 100 seconds and turned off for 60 seconds. Thereby, the dew condensation prevention heater 8 outputs 4 W (per cycle). The output of the dew condensation prevention heater 8 can be detected by detecting a control signal for controlling the dew condensation prevention heater 8 to be ON / OFF.

  The output table Tb1 of the refrigerator Rf indicates that the condensation prevention heater 8 when the condensation prevention heater 8 is operated so that condensation does not occur when the refrigerator Rf is actually operated under an environment of predetermined conditions (ambient temperature and ambient humidity). It is created based on the actual output value. The output value of the condensation prevention heater 8 in the output table Tb1 is an output value that can prevent condensation and minimize power consumption. In the table Tb1, all the values (different characters) are different as the output of the dew condensation prevention heater 8, but some of the values may be the same.

  The refrigerator Rf detects the ambient temperature with the ambient temperature sensor S3 and the ambient humidity with the ambient humidity sensor S4 at the start of operation. And the control part 200 drive-controls the dew condensation prevention heater 8 based on the ambient temperature and ambient humidity. Thereby, generation | occurrence | production of the dew condensation in the fitting part of the door 11 is suppressed.

  In the kitchen, a cooking device that releases water vapor (for example, a rice cooker or a kettle pot) may be disposed near the refrigerator Rf. When cooking is started using such a device, water vapor is released, and the ambient temperature and humidity around the door 11 become higher than the ambient temperature and ambient humidity detected by the ambient temperature sensor S3 and the ambient humidity sensor S4, thereby preventing condensation. Although the heater 8 is driven, condensation may occur. That is, even if the dew condensation prevention heater 8 is driven by the output based on the ambient temperature and the ambient humidity detected by the ambient temperature sensor S3 and the ambient humidity sensor S4 under the control of the control unit 200, the dew condensation may not be sufficiently prevented.

  In the refrigerator Rf, when dew condensation due to steam generated from other cooking equipment (rice cooker, etc.) occurs, it is due to sudden change in conditions, and therefore when the cause of dew condensation is removed (for example, cooking) In most cases, the condensation is eliminated. However, condensation may impair the user's feeling of use.

  Therefore, in the refrigerator Rf, an operator (user, operator, repairer, etc.) can adjust the output of the dew condensation prevention heater 8 using the operation input unit Ip. As shown in FIG. 5, a display IF1 (output display) having the same contents as the output table Tb1 shown in FIG. 9 is provided on the inner wall surface of the heat insulating box 100 of the refrigerator Rf. The display IF1 may be displayed by pasting a sheet (for example, a sticker) on which the output table Tb1 is written, or may be displayed directly by printing or the like. Here, a sheet on which a sheet on which the output table Tb1 is written is pasted.

  For example, when the condensation of the door 11 occurs while the condensation prevention heater 8 is being driven, the operator performs an operation of increasing the output of the condensation prevention heater 8 with the operation input unit Ip. A display IF1 is provided in the heat insulation box 100 (refrigeration chamber 1), and the operator confirms the output table Tb1 of the display IF1 and outputs the output of the dew condensation prevention heater 8 using the operation input unit Ip. Input an output for raising one stage or a plurality of stages. In the following description, the input of the output is input as a number.

  For example, when the ambient temperature is greater than or equal to Th2 and less than Th3, the ambient humidity is greater than or equal to Hm5 and less than Hm6, and dew condensation is occurring when the output of the dew condensation prevention heater 8 is W35, the operator can In this stage, the values of the ambient temperature of Th3 or more and less than Th4 and / or the ambient humidity of Hm6 or more and less than Hm7, that is, the values of W45, W36 and W46 can be obtained from the output table Tb1.

  Since the operator acquires the ambient temperature, ambient humidity, and the output of the dew condensation prevention heater 8 via the display unit Dp, the operator confirms the output table Tb1 displayed on the display IF1 and dew condensation in the next stage. The output of the prevention heater 8 can be acquired. Hereinafter, an operation for adjusting the output of the dew condensation prevention heater 8 by the operator will be described. FIG. 10 is a flowchart showing a procedure for adjusting the output of the dew condensation prevention heater.

  In the refrigerator Rf, the operator cannot adjust the output of the dew condensation prevention heater 8 during normal times (the normal mode is set). Therefore, the refrigerator Rf (the control unit 200) includes a mode (adjustment mode) in which the condensation prevention heater 8 can be adjusted. Note that the adjustment mode may be known to the user, or may be known only to an operator (for example, a service person) who performs manufacture and / or repair. Here, the operation of the operation input unit Ip for switching to the adjustment mode and the adjustment mode is well known to the user. As a well-known method, it may be specified in the instruction manual, or a method for switching to the adjustment mode may be specified near the operation input unit Ip.

  The control unit 200 confirms whether the operation input unit Ip has received an input for switching to the adjustment mode (step S101). As an input for switching to the adjustment mode, the first button switch Ip1 to the fourth button switch Ip4 can be operated in a predetermined procedure. For example, in this embodiment, it is assumed that the adjustment mode is switched by simultaneously pressing the first button switch Ip1, the second button switch Ip2, and the third button switch Ip3 for 1 second. The confirmation of switching is repeated until the switching of the adjustment mode is confirmed (until Yes in step S101, that is, during No in step S101).

  When the operation input for switching the adjustment mode is confirmed (Yes in step S101), the control unit 200 uses the display unit Dp to obtain the ambient temperature currently acquired from the ambient temperature sensor S3 and the ambient humidity sensor S4, The ambient humidity and the output of the dew condensation prevention heater 8 are displayed (step S102). As a method of displaying the ambient temperature, ambient humidity, and the output of the dew condensation prevention heater 8 using the display unit Dp, a combination of lighting and blinking of the first LED lamp Dp1 to the fourth LED lamp Dp4 is used here.

  For example, the first LED lamp Dp1 and the second LED lamp Dp2 are simultaneously flashed a predetermined number of times to notify the operator (user, worker, etc.) that the ambient temperature is indicated. A number is expressed by a combination of lighting or blinking of the first LED lamp Dp1 to the fourth LED lamp Dp4. For example, the first LED lamp Dp1 is the tens place, the second LED lamp Dp2 is the first place, and the third LED lamp Dp3 is the first place after the decimal point. Although it can mention a thing, it is not limited to this. Then, the end of the display of the ambient temperature is notified by simultaneously flashing the third LED lamp and the fourth LED lamp a predetermined number of times.

  Similarly, the first LED lamp Dp1 and the third LED lamp Dp3 are blinked at the same time to notify the display of the ambient humidity, and the end is notified by simultaneously blinking the second LED lamp Dp2 and the fourth LED lamp Dp4. The above display method is an example, and other methods may be used, but a display method that can be easily recognized by the operator is preferable. Further, the display unit Dp displays the current output of the dew condensation prevention heater 8 in the same manner. In addition to the lighting or blinking of the first LED lamp Dp1 to the fourth LED lamp Dp4 of the display unit Dp, notification by sound may be synchronized.

  The control unit 200 confirms whether or not the operation input unit Ip has received an operation input for terminating the display of the ambient temperature, the ambient humidity, and the output of the dew condensation prevention heater 8 (step S103). The operation input for terminating the display of the ambient temperature, the ambient humidity, and the output of the dew condensation prevention heater 8 includes, for example, pressing and holding the fourth button switch Ip4 (decision button) (for example, 1 second). Yes, but not limited to this.

  When the control unit 200 does not confirm the acceptance of the operation input for ending the display (No in step S103), the display of the ambient temperature, the ambient humidity, and the output of the dew condensation prevention heater 8 is repeated (return to step S102). That is, the display of the ambient temperature, the ambient humidity, and the output of the dew condensation prevention heater 8 is sequentially repeated. By repeating the display a plurality of times, it is possible to accurately read the ambient temperature, the ambient humidity, and the output value of the dew condensation prevention heater 8 even if it is difficult to read once.

  When it is confirmed that the operation input for ending the display is accepted (Yes in step S103), the control unit 200 confirms whether or not the operation input unit Ip has accepted an operation input for changing the output of the dew condensation prevention heater 8. (Step S104). As an operation input for changing the output of the dew condensation prevention heater 8, for example, a long press (for example, 1 second) of the fourth button switch Ip4 (decision button) can be mentioned, but it is not limited to this.

  If the operation input unit Ip has not confirmed acceptance of an operation input for changing the output of the condensation prevention heater 8 (No in step S104), whether or not an operation input that does not change the output of the condensation prevention heater 8 has been accepted. (Step S105). If it is not confirmed that an operation input that does not change the output of the dew condensation prevention heater 8 has been received (No in step S105), the process returns to step S104. When it is confirmed that an operation input that does not change the output of the dew condensation prevention heater 8 is accepted (Yes in step S105), the process returns to the normal mode (step S111).

  As an operation input that does not change the output of the dew condensation prevention heater 8, for example, a long press (for example, 1 second) of the first button switch Ip1 (menu button) can be mentioned, but it is not limited thereto. An operation input different from the operation input for changing the output can be widely adopted.

  When an operation input for changing the output of the dew condensation prevention heater 8 is received (Yes in step S104), the control unit 200 acquires the output of the dew condensation prevention heater 8 based on the operation input from the operation input unit Ip. (Step S106). As a method for inputting a number (output) using the operation input unit Ip, the number may be input using the second button switch Ip2 as a “+” button and the third button switch Ip3 as a “−” button.

  For example, assuming that the output after adjustment (after change) of the dew condensation prevention heater 8 is 6.4 (W), one in which the first place and the first place after the decimal point are separately input can be exemplified. That is, the second button switch Ip2 (“+” button) is pressed six times, the fourth button switch Ip4 (decision button) is pressed to determine the first place, and then the second button switch Ip2 (“+” button) is again selected. ) Four times and the fourth button switch Ip4 (decision button) is pressed to determine the first decimal place. Then, the numerical value input may be confirmed by pressing the fourth button switch Ip4 again. In addition, after the numerical value of each digit is determined, the numerical value may be confirmed on the display unit Dp.

  Further, since the operator knows the current output of the dew condensation prevention heater 8, the operator recognizes the difference from the next stage. Therefore, adjustment may be made by pressing the second button switch Ip2 and the third button switch Ip3 by the difference.

  For example, if the current output is 6.0 (W) and the changed output is 6.4 (W), the second button switch Ip2 (“+” button) is pressed four times, and the fourth button switch Ip4 ( You may make it determine by pushing a determination button. Either a method of directly inputting a numerical value or a method of inputting a difference may be used, or both of them may be used and switched as necessary. The input method is not limited to these, and input may be performed using an input method different from these.

  When acquiring the output to the operation input unit Ip, the control unit 200 starts the operation of the dew condensation prevention heater 8 so as to obtain the acquired output (Step S107). Then, the control unit 200 stores the changed output of the dew condensation prevention heater 8 in the storage unit 202 (step S108), and measures the time from the output change start by the time measuring unit 201 (step S109).

  The control unit 200 confirms that a certain time has elapsed from the start of the output change (Step S110), and the control unit 200 changes the output until the certain time has elapsed (until Yes in Step S110, that is, No in Step S110). To control the dew condensation prevention heater 8. When the elapse of a certain time is confirmed (Yes in Step S110), the control unit 200 returns from the adjustment mode to the normal mode (Step S111). Thus, the control unit 200 refers to the output table Tb1 and controls the dew condensation prevention heater 8 so that the output is based on the ambient temperature and ambient humidity from the ambient temperature sensor S3 and ambient humidity sensor S4.

  Here, the predetermined time may be a predetermined time. Further, a time during which dew generation can be suppressed by the control unit 200 is calculated from the ambient temperature and ambient humidity and the output after the change, and the calculated time or a slightly longer time may be used.

  As for how much the output of the dew condensation prevention heater 8 is changed, that is, how many steps the value is changed to, for example, the operator explains the state over the phone to the manufacturer's window and hears the state. The output to be changed may be determined according to the instruction from. Moreover, you may make it determine the output after a change from experience so far. Furthermore, the method for determining the output of the dew condensation prevention heater 8 may be described in the instruction manual and determined according to the instruction manual.

  Moreover, the user may have a thermometer and a hygrometer. In such a case, the user can measure the temperature and / or humidity in the vicinity of the portion where condensation occurs in the thermometer and hygrometer that the user owns. Then, an appropriate output (output to be changed) of the dew condensation prevention heater 8 may be determined from the output table Tb1 based on the measured temperature and humidity.

  By operating in this way, the output of the dew condensation prevention heater 8 is determined based on the accurate temperature and humidity in the vicinity of the portion where dew condensation has occurred, so that it is necessary and not too large for preventing dew condensation. The dew condensation prevention heater 8 can be driven by the output. If the user owns either a thermometer or a hygrometer, use the ambient temperature and ambient humidity detected by the ambient temperature sensor S3 or ambient humidity sensor S4 that the user does not measure. You may make it do.

  Further, in the present embodiment, since the output to be changed by the dew condensation prevention heater 8 is input by numerals, the output from the dew condensation prevention heater 8 can be a numerical value between adjacent stages of the output table Tb1. It is. For example, in the output table Tb1 shown in FIG. 9, if W24 is 2.0 (W) and W25 is 2.6 (W), when the output is changed by increasing the level from W24 to W25 in the adjustment mode. It is possible to input any of 2.1 to 2.5 instead of 2.6.

  With such a configuration, the operator can change the output of the condensation prevention heater without excess or deficiency in order to prevent condensation. Since the output of the dew condensation prevention heater can be accurately adjusted in this way, it is possible to suppress power consumption, suppress the occurrence of dew condensation, and improve user convenience.

  The output table Tb1 may be viewable on the Internet or may be described in an instruction manual. It is possible to perform the same operation by referring to these output tables Tb1, but in the case of data on the Internet, a device (tablet terminal, notebook computer, etc.) for displaying the output table Tb1 is required. Internet connection is required. Therefore, the output table Tb1 cannot be viewed unless these requirements are satisfied. Even if these requirements are satisfied, depending on the location of the refrigerator Rf and the location of the operation input unit Ip, there may be no place to place the device, and operation while viewing the device may be difficult. .

  Further, when described in the instruction manual, it is necessary to perform the operation while looking at the instruction manual, and the operation is troublesome because the operation input unit Ip is operated while holding the instruction manual. Further, the instruction manual may be stored in a different place from the refrigerator Rf, and information may not be obtained immediately when necessary. Further, the instruction manual may be lost, and in this case, necessary information cannot be obtained.

  On the other hand, in the case of the refrigerator Rf of the present invention, the display IF1 is provided on the inner surface of the heat insulating box 100 of the refrigerator Rf, so that the operator can immediately change the ambient temperature, ambient humidity, and condensation prevention heater 8 when necessary. It is possible to obtain the output relationship.

  In addition, when the output change of the dew condensation prevention heater 8 is frequently performed, it is considered that the temperature and / or humidity around the door 11 is constantly increased. Therefore, when the frequency of the output change of the dew condensation prevention heater 8 is equal to or higher than a certain level (for example, 3 times or more within 24 hours), the dew condensation prevention heater 8 may be operated while maintaining the changed output.

  In the present embodiment, four LED lamps are used as the display unit Dp, but the present invention is not limited to this. For example, a display device capable of displaying numbers (for example, a 7-segment display device) may be used, or a device capable of displaying an image such as a liquid crystal panel may be used. Moreover, you may use combining these. When a display unit capable of displaying numbers is used, the ambient temperature, ambient humidity, and the output of the dew condensation prevention heater 8 may be displayed as numbers. Further, the operation input unit Ip may include a numeric keypad, and when the display unit Dp is a liquid crystal panel, it may be a touch panel that performs operation input by touching an area on the liquid crystal panel. In some cases, the operation input unit Ip is provided inside the heat insulating box 100. In such a case, it is preferable that the display IF1 is disposed in the vicinity of the operation input unit Ip.

  In the case of using a liquid crystal panel as the display unit Dp, an image of the same grid as the output table Tb1 (the output of the condensation prevention heater 8 may be displayed inside the grid) is displayed, and the operation input unit Ip The squares may be selected to determine the output.

  Moreover, the display IF1 is provided in a portion that is easily noticeable to the user, so that the user can recognize the output of the dew condensation prevention heater 8. Therefore, the reason why the vicinity of the portion where the dew condensation prevention heater 8 is provided (here, the right door 11R) is high can be known, and the user's anxiety can be suppressed.

(Second Embodiment)
Another example of the refrigerator according to the present invention will be described with reference to the drawings. FIG. 11 is a rear view of another example of the refrigerator according to the present invention, and FIG. 12 is a diagram showing another example of the output table. The refrigerator Rf shown in FIG. 11 has the same configuration as the refrigerator Rf shown in FIG. 1 and the like, and substantially the same parts are denoted by the same reference numerals and detailed description thereof is omitted.

  In the above description, since the dew condensation caused by sudden changes in conditions such as receiving steam from other devices is suppressed, the adjustment mode is operated by the operation input unit Ip in consideration of the operation by the user. I was able to do it. However, there is a case where condensation occurs due to abnormality of various sensors attached to the refrigerator Rf or abnormality of the condensation prevention heater 8.

  Such condensation is caused by an abnormality (failure) in the refrigerator Rf (sensor, heater, etc.), and thus it is difficult to fundamentally solve it by the above-described operation by the user. Therefore, an operator who has a certain level of technology (knowledge) for the refrigerator Rf diagnoses the problem of the refrigerator Rf (sensor, heater, etc.), solves the problem, and repairs the refrigerator Rf. Suppresses the occurrence of condensation.

  When repairing the refrigerator Rf, the operator connects the inspection device Ts to a predetermined terminal of the control board Bd provided with the control unit 200 of the refrigerator Rf, and detects a signal from each terminal. The inspection device Ts shown in FIG. 11 is a voltmeter Vm and a notebook personal computer Pc, but is not limited to this, and devices that can detect an ambient temperature signal and an ambient humidity signal can be widely used.

  As described above, the ambient temperature sensor S3 and the ambient humidity sensor S4 transmit the ambient temperature and ambient humidity to the control unit 200 as the ambient temperature signal and ambient humidity signal. The inspection apparatus Ts shown in FIG. 11 directly acquires these signals. The ambient temperature signal and the ambient humidity signal are output voltages (V) of the ambient temperature sensor S3 and the ambient humidity sensor S4. In the ambient temperature signal, the signal voltage decreases as the temperature increases, and in the ambient humidity signal, the signal voltage increases as the humidity increases. In addition, the inspection apparatus Ts acquires a control signal for controlling the dew condensation prevention heater 8 from the control board Bd, and obtains an energization rate (duty ratio) of the dew condensation prevention heater 8 from the control signal.

  For example, when the ambient temperature signal and the ambient humidity signal are detected by a voltmeter and the energization rate of the dew condensation prevention heater 8 is detected by the notebook computer Pc, the output table Tb1 as shown in FIG. It is necessary to convert the output to the ambient humidity and the output of the dew condensation prevention heater 8. Therefore, at the time of repair work by the worker, an output table Tb2 in which the ambient temperature signal, the ambient humidity signal, and the current application rate of the dew prevention heater 8 are associated as shown in FIG. 12 is used.

  The output table Tb2 shown in FIG. 12 shows the energization rate of the dew condensation prevention heater 8 with respect to the ambient temperature signal voltage and the ambient humidity signal voltage. The ambient temperature signal is distributed in the voltage range in the horizontal direction, and the ambient humidity signal is distributed in the voltage range in the vertical direction. In the example shown in FIG. 12, the distribution of the ambient temperature signal is divided into five stages and the distribution of the ambient humidity signal is divided into ten stages. However, the present invention is not limited to this, and is divided into more (small) stages. May be.

  Note that the output table Tb2 shown in FIG. 12 has substantially the same contents as the output table Tb1, except that the displayed values are different. For example, the case where the ambient temperature signal is St2 or more and less than St3 and the ambient humidity signal is Sh5 or more and less than Sh6 is the same as the case where the ambient temperature is Th2 or more and less than Th3 and the ambient humidity is Hm5 or more and less than Hm6. Further, the dew condensation prevention heater 8 outputs W35 when the energization rate is C35.

  In order to check whether the ambient temperature sensor S3, the ambient humidity sensor S4, and the dew condensation prevention heater 8 are operating correctly, the ambient temperature and ambient humidity are detected from the ambient temperature sensor S3 and the ambient humidity sensor S4 of the refrigerator Rf, and dew condensation is prevented. The energization rate of the heater 8 is detected. Then, these values are compared with the output table Tb2.

  And in refrigerator Rf, display IF2 which showed output table Tb2 is provided in the back surface of refrigerator Rf, ie, the opposite side to which the opening of the heat insulation box 100 is formed. Since the control board Bd directly acquires the ambient temperature signal, the ambient humidity signal, and the energization rate of the dew condensation prevention heater 8, it takes time to convert the received signal into the ambient temperature, the ambient humidity, and the output of the dew condensation prevention heater 8. It can be omitted. In addition, since the signal is directly acquired, it is possible to diagnose a malfunction of the signal itself (for example, noise or disconnection).

  And since the control board Bd is arrange | positioned in the machine room 10, in order to repair (maintenance) refrigerator Rf, an operator always accesses the back surface of refrigerator Rf. By providing the display IF2 indicating the output table Tb2 on the rear surface of the refrigerator Rf, the operator can accurately grasp the relationship between the ambient temperature signal, the ambient humidity signal, and the dew condensation prevention heater 8.

  Then, the operator compares the detected ambient temperature signal, ambient humidity signal, and energization rate of the condensation prevention heater 8 with the output table Tb2, and if there is an abnormality (for example, the output of the condensation prevention heater 8 is insufficient). Therefore, it is possible to identify a portion having an abnormality and perform repair or replacement.

  Furthermore, since the diagnosis can be performed while looking at the display IF2, if a terminal on the control board Bd to which the test apparatus Ts is connected is known, a separate booklet for a worker (service manual or the like) is unnecessary, and details of the refrigerator Rf Even a worker who does not know can be diagnosed. Note that which terminal of the control board Bd is to be measured may be described together with the output table Tb2 on the display IF2. Moreover, although the display IF2 is provided on the back surface of the heat insulating box 100, the display IF2 is not limited thereto, and may be provided on the lid or on the back surface of the lid.

  Further, the output table Tb1 and the output table Tb2 may be displayed side by side on the display IF2. In this way, for example, the temperature or humidity is measured with a thermometer or hygrometer separately prepared by the operator, and the ambient temperature sensor S3 and the ambient humidity signal are compared by comparing the temperature with the ambient temperature signal or the humidity and ambient humidity signal. It is also possible to diagnose a malfunction (damage, failure, etc.) of the ambient humidity sensor S4.

  In some cases, the refrigerator Rf can directly detect the ambient temperature signal and the ambient humidity signal from the ambient temperature sensor S3 and the ambient humidity sensor S4 disposed on the upper surface of the heat insulating box 100. In this case, as shown in FIG. 7, the display IF 3 including the output table Tb <b> 2 may be provided on the upper surface (top surface) of the heat insulating box 100. By performing the display IF 3 at such a position, it is not necessary to turn to the back surface of the refrigerator Rf, so that the operation becomes easy. The energization amount of the dew condensation prevention heater 8 may be detected from the upper surface of the refrigerator Rf. Further, in the case where the detection is possible from the control board Bd as described above, both the display IF2 and the display IF3 may be provided.

  Moreover, the hidden mode which is not notified to a user may be included. When the mode is switched to the hidden mode, the dew condensation prevention heater 8 is driven with the output when the ambient humidity is maximum while the ambient temperature distribution remains unchanged. By performing such driving, it is possible to confirm whether or not the condensation is eliminated by the condensation prevention heater 8. When the hidden mode is entered, the ambient humidity may be changed to be one or more stages higher than the current stage, and the output may not necessarily be the maximum ambient humidity.

  Furthermore, the voltage of the power supply at the user's house may be detected from the control board Bd, and the output of the dew condensation prevention heater 8 may be corrected based on the detected voltage. For example, when used in Japan, the refrigerator Rf is mostly designed with a rated voltage of 100 V AC and 50 Hz / 60 Hz. When the power supply voltage at the user's home is 90 V for some reason, the energization amount (output) is 0.81 times. At this time, each energization amount of the output table Tb2 is increased by 20%, and adjustment is performed so as to drive the dew condensation prevention heater 8. By adjusting in this way, it is possible to reliably prevent condensation regardless of the installation location.

  The power supply voltage at the user's house may be detected by the operator using the test apparatus Ts, or a function for detecting the voltage is provided in the control unit 200 in advance, and the voltage value is set. It may be used (displayed on the display unit Dp, detected by the test apparatus Ts, etc.). Moreover, when the control part 200 is provided with the function to detect a voltage, you may make it correct | amend automatically and may make it correct | amend by an operator.

(Third embodiment)
Still another example of the refrigerator according to the present invention will be described with reference to the drawings. FIG. 13 is a flowchart showing the operation of another example of the refrigerator according to the present invention. The structure of the refrigerator Rf according to the present embodiment is the same as the refrigerator Rf of the first embodiment. Therefore, substantially the same parts are denoted by the same reference numerals and detailed description of the same parts is omitted. The output table Tb1 is the same as that in the first embodiment.

  The output table Tb1 is created as follows. First, when the refrigerator Rf is manufactured, the refrigerator Rf is operated in a measurement chamber where the environmental conditions are constant, the condensation prevention heater 8 is operated so that condensation does not occur, and the output of the condensation prevention heater 8 at that time is acquired. Based on the output of the dew condensation prevention heater 8 under this environmental condition, the output of the dew condensation prevention heater 8 for each ambient temperature and ambient humidity condition is calculated, and the output table Tb1 is produced.

  On the other hand, the place (kitchen) where the refrigerator Rf is actually used has different environmental conditions (temperature, humidity, sunshine, etc.) and is different from the conditions assumed when the output table Tb1 is created. May be used under environmental conditions. When the output of the dew condensation preventing heater 8 is determined based on the ambient temperature and the ambient humidity with reference to the output table Tb1 under environmental conditions different from the assumptions, dew condensation may occur.

  When condensation occurs, the operator changes the output of the condensation prevention heater 8 as described above. When the output is frequently changed, the control unit 200 determines that the output based on the output table Tb1 is not sufficient as the output of the dew condensation prevention heater 8, and calibrates the output. The output calibration procedure will be described below with reference to FIG.

  The controller 200 monitors the output change of the dew condensation prevention heater 8 from the start of operation of the refrigerator Rf (step S201). Then, it is confirmed whether the output has been changed a certain number of times or more (for example, 100 times or more in 30 days from the start of operation) within a predetermined time under a certain ambient temperature and ambient humidity condition (step S202). If the output change has not been performed more than a certain number of times within the predetermined time (No in step S202), the process returns to step S201 to continue monitoring the output change.

  When the output change is performed a predetermined number of times or more within the predetermined time (Yes in step S202), the control unit 200 confirms the output change history, and the ambient temperature, ambient humidity, and change when the change is made. The output after the change of the subsequent dew condensation prevention heater 8 is acquired (step S203). Then, all the changed outputs are collected and smoothed (step S204). Then, the output of the dew condensation prevention heater 8 at the stage of the ambient temperature and ambient humidity in which the output is changed a predetermined number of times or more within a predetermined time is smoothed, and the output table Tbm1 stores the output in the storage unit 202. It replaces with the output of the stage (step S205). An example of the smoothing method is an arithmetic mean, but is not limited to this. For example, a standard deviation may be used.

  Thus, by replacing the output of the dew condensation prevention heater 8 at the ambient temperature and / or ambient humidity where the output change frequently occurs in the stored output table Tbm1, the dew condensation prevention heater 8 of the refrigerator Rf is appropriately set. Can be driven. Thereby, while suppressing dew condensation reliably, waste of electric power (consumption of excessive electric power with the dew condensation prevention heater 8) can be suppressed.

  Since the output table Tb1 of the display IF1 is not changed, when the operator changes the output with reference to the output table Tb1 of the display IF1, the control unit 200 acquires the corresponding output of the output table Tbm1, and the output is The dew condensation prevention heater 8 is controlled. Moreover, it is not limited to this. For example, when the output is received via the operation input unit Ip, if the output is larger than the current output, the value is used, and if the output is smaller, the corresponding output of the stored output table Tbm1 is used. May be. Moreover, it is not limited to these, You may employ | adopt what corrects by a ratio and adds a difference.

(Fourth embodiment)
Still another example of the refrigerator according to the present invention will be described. The structure of refrigerator Rf concerning this invention is the same as refrigerator Rf of 1st Embodiment, and abbreviate | omits detailed description. The detection accuracy of the ambient humidity sensor S4 may deteriorate due to adhesion to water or oil. As described above, the refrigerator Rf is often installed in the kitchen, and the oil is blown by cooking using oil such as fried food and fried food. Moreover, even if dust, dust, etc. adhere, detection accuracy will fall. Therefore, the refrigerator Rf is covered with the hinge cover 111 to suppress the adhesion of oil, dust, dust and the like to the ambient humidity sensor. However, if the operation period of the refrigerator Rf becomes longer, the detection accuracy of the ambient humidity sensor S4 becomes higher. May decrease.

  Therefore, when the dew condensation prevention heater 8 is driven with the output obtained based on the ambient temperature and ambient humidity with reference to the output table Tbm1 (here, the same as the output table Tb1) stored in the storage unit 202, dew condensation occurs. May occur. Therefore, in the refrigerator Rf, as described above, the output of the dew condensation prevention heater 8 is changed by performing an operation using the operation input unit Ip.

  The detection accuracy of the ambient humidity sensor S4 is greatly reduced due to the influence of oil, dust, etc., but the ambient temperature sensor S3 often does not change much. Therefore, when changing the output of the dew condensation prevention heater 8 based on the output table Tbm1, the shift is made only to the ambient humidity side. That is, in the output table Tbm1, the output value arranged below the dew condensation prevention heater 8 is used. Then, the changed number of stages (the number of frames) is stored in the storage unit 202 as a calibration amount. Then, the control unit 200 operates for a certain period of time with the changed output of the dew condensation prevention heater 8, and then returns to the normal mode, that is, the operation of determining the output based on the ambient temperature and ambient humidity with reference to the output table Tb1. At this time, when the control unit 200 refers to the output table Tbm1 and determines the output based on the ambient temperature and the ambient humidity, the output value shifted by several steps downward with the above-described calibration value is employed.

  For example, when the ambient temperature is not less than Th2 and less than Th3 and the ambient humidity is not less than Hm5 and less than Hm6, the output referring to the output table Tbm1 is W35. If the calibration amount is “2 steps up”, the output after calibration is W37, and the dew condensation prevention heater 8 is driven by the output W37. Thus, by calibrating the ambient humidity, the measurement error of the ambient humidity sensor S4 can be corrected and the dew condensation prevention heater 8 can be operated exactly.

  When the output of the dew condensation prevention heater 8 is calibrated so as to increase the level of the output table Tbm1, depending on the calibration amount (number of stages) and the detected humidity, the level of the output table Tbm1 is lower than the lowest level (the most severe level). In some cases, the lower stage may be shifted to. In preparation for such a case, a virtual stage may be provided in the output table Tb1 further below the lowermost stage (here, the humidity Hm9 or more), and the output at that stage may be set. In the case of calibration that shifts to a lower level than the lowest level of the output table Tbm1, the output at the lowest level (the most severe condition) may be used as the output of the condensation prevention heater 8.

  The calibration according to the present embodiment calibrates a decrease in detection accuracy of ambient humidity due to time degradation (adhesion of oil or dust). Therefore, the calibration process may not be performed until a predetermined time has elapsed after the start of the operation of the refrigerator Rf or the cleaning of the ambient humidity sensor S4. Note that after cleaning the ambient humidity sensor S4, the counter may be reset by the operation input unit Ip.

  In the present embodiment, the ambient humidity sensor S4 is calibrated. However, the present invention is not limited to this, and the ambient temperature sensor S3 may be calibrated, or the ambient temperature sensor S3 or both may be calibrated. You may do it.

  In each embodiment mentioned above, although the output of the heater for preventing the dew condensation of the matching part of the pair of doors 11 of the refrigerator compartment 1 is determined, it is not limited to this. For example, the output of the heater for preventing condensation on the front surface of the partition wall between the refrigerator compartment and the freezer compartment or the output of the heater for preventing condensation on the side wall may be used. The dew condensation prevention heater provided in the refrigerator Rf, which is determined by the ambient temperature and ambient humidity, can be widely used.

  Moreover, in each embodiment mentioned above, although it is set as the structure provided with the operation input part Ip and the display part Dp in the refrigerator Rf main body, it is not limited to this. For example, when the refrigerator Rf has a configuration capable of wired or wireless communication, it is displayed on a display unit of an information terminal such as a smartphone, a PC, or a tablet, and an operation input is performed using the input device of the information terminal as an operation input unit. May be.

  In each embodiment mentioned above, what provided the display was provided in the inner surface (display IF1), the back surface (display IF2), and the upper surface (display IF3) of the heat insulation box 100. However, it is not limited to this, The side of the heat insulation box 100, the inner surface of the door 11, etc. may be sufficient.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this content. The embodiments of the present invention can be variously modified without departing from the spirit of the invention.

  The refrigerator according to the present invention includes a temperature detection unit that detects the ambient temperature of the main body, a humidity detection unit that detects the ambient humidity of the main body, and a dew condensation prevention heater that heats part of the main body to prevent condensation. The dew condensation prevention heater is operated with an output based on the ambient temperature and ambient humidity of the main body, and the output can be changed as necessary, and the ambient temperature and the ambient humidity are set at predetermined positions of the main body. An output display which is a table showing a relationship with the output of the dew condensation prevention heater is arranged.

  In the refrigerator described above, the output display may use an energization amount to the condensation prevention heater as an output of the condensation prevention heater.

  In the refrigerator described above, the output display may use a voltage value of a signal output from the temperature sensor as information on the ambient temperature.

  In the refrigerator described above, the output display may use a voltage value of a signal output from the humidity sensor as the ambient humidity information.

  The above-described refrigerator includes an operation input unit that receives an operation input. When the operation input unit receives the operation input, the operation output of the dew condensation prevention heater is changed to an output based on the operation input. May be.

  The above-described refrigerator may include a display unit that displays the output of the dew condensation prevention heater.

  In the above refrigerator, the display unit may be capable of displaying the ambient temperature and the ambient humidity.

  The refrigerator described above drives the dew condensation prevention heater with an output changed based on an operation input, and after a predetermined time has elapsed, drives the dew condensation prevention heater with an output based on the ambient temperature and the ambient humidity. May be.

  The above-mentioned refrigerator acquires an output based on the ambient temperature and the ambient humidity from the output display, compares an output based on an operation input from the operation input unit, and outputs an output for the ambient temperature and the ambient humidity. You may calibrate.

Rf Refrigerator 100 Heat insulation box 1 Refrigeration room 11 Door 110 Hinge 111 Hinge cover 12 Shelf 13 Pocket 14 Compressor 2 Lower refrigeration room 21 Door 22 Storage case 23 Sliding case 200 Control part 201 Timekeeping part 202 Storage part 3 Upper refrigeration room 31 Door 32 Storage case 4 Ice making room 41 Door 42 Storage case 5 Vegetable room 51 Door 52 Storage case 6 Cold air passage 61 Freezer compartment fan 62 Evaporator 63 Defrost heater 631 Heater cover 601, 602, 603 Discharge port 604 Return port 7 Cold air flow Path 71 Damper 72 Refrigeration room fan 701 Discharge port 702 Communication path 703 Return port 8 Condensation prevention heater S1 Freezing room temperature sensor S2 Refrigeration room temperature sensor S3 Ambient temperature sensor S4 Ambient humidity sensor Ip Operation input unit Dp Display unit

Claims (5)

A temperature detector that detects the ambient temperature of the main body,
A humidity detector for detecting the ambient humidity of the main body;
And condensation prevention heater for preventing condensation by heating a portion of said body,
A control unit including a storage unit that stores an output table in which the output of the dew condensation prevention heater based on the ambient temperature and the ambient humidity is set;
An output display unit provided on the main body for displaying a table indicating the contents of the output table ;
The control unit includes a normal mode for driving and controlling the dew condensation prevention heater based on the output table stored in the storage unit, the temperature detected by the temperature detection unit, and the humidity detected by the humidity detection unit, and an operation A refrigerator that switches and executes an adjustment mode in which the output of the dew condensation prevention heater is increased or decreased based on an operation input by a person . The refrigerator according to claim 1, wherein the output display unit uses an energization amount to the dew condensation prevention heater as an output of the dew condensation prevention heater. It has an operation input unit that accepts operation inputs,
The refrigerator according to claim 1 or 2, wherein when the operation input unit receives, the output of the dew condensation prevention heater is changed based on the operation input.   The refrigerator according to claim 3, wherein the dew condensation prevention heater is driven with an output changed based on an operation input, and the dew condensation prevention heater is driven with an output based on the ambient temperature and the ambient humidity after a predetermined time has elapsed. . While obtaining the output based on the ambient temperature and the ambient humidity from the output table , and comparing the output based on the operation input from the operation input unit,
The refrigerator according to claim 3 or 4, wherein the output with respect to the ambient temperature and the ambient humidity is calibrated.

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