JPH0674633A - Control device for freezer and refrigerator - Google Patents

Abstract

PURPOSE:To provide a control device for a freezer and a refrigerator capable of reducing the number of time for actuation of a compressor without decreasing a food freshness degree, holding power of a freezer and a refrigerator and further capable of saving energy. CONSTITUTION:A control device for a freezer and a refrigerator is comprised of a temperature sensor 19 in a freezing chamber, a freezing chamber temperature sensing means 20 for sensing a temperature within the freezing chamber, a maximum temperature means 30 for sensing the maximum temperature of every one cycle, and a maximum temperature variation calculating means 32 for calculating a variation state of the maximum temperature within a specified period of time. In addition, this control device includes a freezing chamber temperature stabilized state sensing means 33 for sensing a stable state in the freezing chamber, a temperature difference setting means 34 for setting a temperature difference between an excitation temperature and a stopping temperature of a compressor 17, a freezing chamber temperature discriminating means 21 for discriminating whether the freezer temperature is within a range of the set temperature or not, and a compressor control means 22 for performing a control over the compressor 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a refrigerator-refrigerator control device that saves energy by reducing the number of startups of a compressor without lowering the ability to maintain food freshness.

[0002]

2. Description of the Related Art A control device for a refrigerator / freezer controls a damper, a fan, and a compressor so as to control the temperature of each of the freezer compartment, the refrigerator compartment, and the vegetable compartment of the refrigerator / freezer at a set temperature. For example, Japanese Utility Model Laid-Open No. 2-47424).

The temperature control of a conventional refrigerator-freezer control device will be described below with reference to the drawings.

FIG. 9 is a functional block diagram of a conventional refrigerator-freezer control device. In FIG. 9, reference numeral 1 is a refrigerator-freezer main body, which is composed of an outer box 2 and an inner box 3 and a urethane foam heat insulating material 4 formed in a space between them, and three doors 5, 6 and 7 are provided in a front opening. Has been done. Door 5,
Reference numerals 6 and 7 are arranged corresponding to the openings of the freezer compartment 8, the refrigerator compartment 9 and the vegetable compartment 10 of the refrigerator-freezer body 1, respectively.

A bottom plate 11 of the freezer compartment 8 and a top plate 12 of the refrigerating compartment 9
An evaporator 13 and a fan 14 are provided behind the evaporator 13 in the partition wall surrounded by. Further, ventilation paths 15 and 16 for introducing cooling air from the evaporator 13 into the respective compartments are formed at the backs of the freezing compartment 8 and the refrigerating compartment 9. Reference numeral 17 is a compressor, and 18 is an electric damper.

Reference numeral 19 is a temperature sensor in the freezer compartment. Reference numeral 20 denotes a freezer compartment internal temperature detecting means for detecting the internal compartment temperature in the freezer compartment by the freezer compartment internal temperature sensor 19. Two
Reference numeral 1 denotes a freezer compartment internal temperature determination means for determining whether the internal compartment temperature detected by the freezer compartment internal temperature detection means 20 is within a set temperature range of the freezer compartment. 22 is a compressor 1
7 is a compressor control means for controlling ON / OFF, and 23 is a fan control means for controlling ON / OFF of the fan 14.

Reference numeral 24 is a temperature sensor inside the refrigerator compartment. Reference numeral 25 denotes a refrigerating compartment internal temperature detecting means for detecting the refrigerating compartment internal temperature by the refrigerating compartment internal temperature sensor 24. Two
Reference numeral 6 denotes a refrigerating compartment internal temperature determining means for determining whether the refrigerating compartment internal temperature detected by the refrigerating compartment internal temperature detecting means 25 is within a set temperature range of the refrigerating compartment. 27 is an electric damper 18
It is an electric damper control means for controlling the opening and closing of the.

The operation of the control device for the refrigerator-freezer having the above-described structure will be described below with reference to FIGS. 9 and 10.

FIG. 10 (a) is a flow chart for explaining the temperature control of the freezer compartment 8 of the conventional refrigerator-freezer. First, the freezing compartment internal temperature detecting means 20 detects the internal compartment temperature Tfc in the freezing compartment by the freezing compartment internal temperature sensor 19 (Step 71). Then, the freezer compartment internal temperature determination means 21
Is the set temperature of the freezer (Tfcon: compressor, fan start temperature, Tfcoff: compressor,
It is judged whether it is within the range of the fan stop temperature) (Step
p72), based on this judgment, the compressor control means 22
Controls ON / OFF of the compressor 17, and the fan control means 23 controls ON / OFF of the fan 14 (S
step 73). As described above, the cold air having an appropriate temperature is sent to the freezing compartment 8 to control the temperature of the freezing compartment 8.

FIG. 10 (b) is a flow chart for explaining the temperature control of the refrigerating compartment 9 of the conventional freezer / refrigerator. First, the refrigerating compartment internal temperature detection means 25 detects the refrigerating compartment internal temperature sensor 24 to detect the refrigerator internal temperature Tpc (Step 81). Then, the temperature determination means 26 in the refrigerator compartment
Determines whether the temperature Tpc in the refrigerator is within the set temperature of the refrigerating room (Tpcon: opening temperature of electric damper, Tpcoff: closing temperature of electric damper) (Step 82). Based on this determination, the electric damper is determined. The control means 27 controls opening / closing of the electric damper 18 (Step 83). From the above, the temperature of the refrigerating compartment 9 is adjusted by sending the cool air of a suitable temperature into the refrigerating compartment 9.

[0011]

However, in the above-mentioned structure, in the freezer compartment 8, the compressor 17 is used.
The set temperatures (Tfcon, Tfcoff) of the freezing compartment, which is the basis for controlling the fan 14 and the fan 14, were constant regardless of the internal temperature Tfc. Therefore, when the temperature inside the refrigerator is stable, the temperature sensor inside the freezer compartment activates or deactivates the compressor with an unnecessarily high accuracy based on the heat capacity of the food, which increases the number of times the compressor is activated with respect to the food freshness retention capacity. Therefore, there is a problem that the power consumption at the time of startup becomes large.

SUMMARY OF THE INVENTION The present invention solves the conventional problems, and an object of the present invention is to provide a control device for a refrigerator / refrigerator that saves energy by reducing the number of times of starting the compressor without lowering the food freshness retaining ability of the refrigerator / freezer. .

[0013]

To achieve this object, a control device for a freezer-refrigerator according to the present invention uses a temperature sensor inside the freezer compartment provided in the freezer compartment, and a temperature sensor inside the freezer compartment to control the inside of the freezer compartment. Freezing room internal temperature detecting means for detecting internal temperature, freezing room internal temperature stable state detecting means for detecting stable state of freezing room by the freezing room internal temperature detecting means, and freezing room internal temperature stability The temperature difference setting means for setting the temperature difference between the start temperature and the stop temperature of the compressor by the output of the state detection means, and the temperature inside the freezer compartment within the set temperature range by the temperature detection means and the temperature difference setting means. It is composed of a freezer compartment internal temperature determination means for determining whether there is any, and a compressor control means for controlling the compressor.

Further, a freezer compartment internal temperature sensor provided in the freezer compartment, a freezer compartment internal temperature detection means for detecting the internal compartment temperature in the freezer compartment by the freezer compartment internal temperature sensor, and day and night detection. A day / night judging means, a temperature difference setting means for setting a temperature difference between a start temperature and a stop temperature of a compressor by an output of the day / night judging means, a freezer compartment internal temperature detecting means and a temperature difference setting means It comprises a freezer compartment internal temperature determination means for determining whether the temperature is within a set temperature range and a compressor control means for controlling the compressor.

Further, a freezer compartment internal temperature sensor provided in the freezer compartment, a freezer compartment internal temperature detection means for detecting an internal compartment temperature in the freezer compartment by the freezer compartment internal temperature sensor, and a front compartment of the freezer compartment. Door switch, a door opening / closing detection means for detecting the opening / closing of the freezer compartment by the door switch, a door opening / closing frequency calculating means for calculating the door opening / closing frequency based on the output from the door opening / closing detection means, and a predetermined time Timer, an average door opening / closing number calculating means for calculating the average number of times of opening / closing of each time, an unused time zone determining means for determining the average number of times of opening / closing of the time zone, and a start temperature and a stop temperature of the compressor. Temperature difference setting means for setting a temperature difference, freezer compartment temperature detecting means and temperature difference setting means for determining whether the compartment temperature is within a set temperature range. A constant section, composed of a compressor control means for controlling the compressor.

Further, a freezer compartment internal temperature sensor provided in the freezer compartment, a freezer compartment internal temperature detection means for detecting the internal compartment temperature in the freezer compartment by the freezer compartment internal temperature sensor, and a front compartment of the freezer compartment. A door switch, a door opening / closing detecting means for detecting door opening / closing of the freezing room by the door switch, and a door opening / closing time calculating means for calculating a door opening / closing time,
A timer for calculating a fixed time, an average door opening / closing time calculating means for calculating an average door opening / closing time for each time, a door opening / closing time judging means for judging an average door opening time of the time zone, and a compressor starting temperature. Temperature difference setting means for setting the temperature difference of the stop temperature, the freezer compartment temperature detection means and the temperature difference setting means to determine whether the refrigerator temperature is within the set temperature range And means for controlling the compressor.

[0017]

With the above-described structure, the control device for a refrigerator / freezer according to the present invention is configured so that the maximum temperature of the output from each temperature detection means in the freezer compartment does not change significantly for a certain period of time or more. Since the temperature difference is detected by the temperature stable state detection means and the temperature difference setting means increases the temperature difference between the compressor start temperature and the compressor stop temperature, the number of times the compressor is started can be reduced without lowering the food freshness retention capacity of the refrigerator / freezer, thus saving energy. Can be achieved.

Further, the day / night judging means discriminates between day and night, and at night when the temperature fluctuation is small, the temperature difference setting means increases the temperature difference between the compressor start temperature and the compressor stop temperature. It is possible to reduce the number of times of starting the compressor without lowering the energy and save energy.

Further, the average value of the number of times of opening and closing the door within a fixed period of 24 hours is calculated by the average number of times of opening and closing of the door by the output from the door opening and closing detection means, and the temperature difference is detected in the time zone when the number of times of opening and closing the door is small. Since the temperature difference between the compressor starting temperature and the compressor stopping temperature is increased by the setting means, it is possible to reduce the number of times of starting the compressor without lowering the food freshness retaining ability of the refrigerator / freezer and to save energy.

Further, the average value of the door opening / closing times within a fixed time period of 24 hours is calculated by the average door opening / closing time calculating means by the output from the door opening / closing detecting means, and the temperature difference is detected in a time period when the door opening / closing time is small. Since the temperature difference between the compressor starting temperature and the compressor stopping temperature is increased by the setting means, it is possible to reduce the number of times of starting the compressor without lowering the food freshness retaining ability of the refrigerator / freezer and to save energy.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a control device for a refrigerator-freezer according to the present invention will be described below with reference to the drawings. It should be noted that the same configurations as those of the conventional one are denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a functional block diagram of a controller for a refrigerator / freezer according to a first embodiment of the present invention. FIG. 2 is a flowchart of the control device for the refrigerator-freezer of the same embodiment.

In FIG. 1, reference numeral 30 is a maximum temperature detecting means for detecting the maximum temperature of the freezer compartment internal temperature detection means 20 for each cycle of the internal compartment temperature. Reference numeral 31 is a timer A.

Reference numeral 32 is the maximum temperature detecting means 30 and the timer A3.
It is the maximum temperature change calculation means for calculating the temperature change of the maximum temperature within a fixed time by the output of 1.

Numeral 33 is a temperature stable state detecting means in the freezer compartment for detecting a stable state in the freezer from the output of the maximum temperature change calculating means 32.

Reference numeral 34 is a temperature difference setting means for setting the temperature difference between the starting temperature and the stopping temperature of the compressor 17 by the output of the stable temperature detecting means in the freezer compartment.

The operation of the refrigerator-refrigerator control device configured as described above will be described below with reference to FIGS. 1 and 2.

First, the freezing compartment internal temperature detecting means 20 detects the internal compartment temperature Tfc in the freezing compartment by means of the freezing compartment internal temperature sensor 19 (Step 11).

Then, the maximum temperature detecting means 30 causes the maximum temperature Tfcx (x = 1,2,3, ... n) of the compressor 17 for each cycle.
Is detected (Step 12).

The maximum temperature change calculating means 32 is a timer A31.
From the output of, the change amount ΔTfc of the maximum temperature Tfcx is calculated from the output of the maximum temperature detecting means 30 as shown in (Equation 1) after a lapse of a certain time (Step 13).

[0031]

[Equation 1]

Then, the stable temperature detecting means 3 in the freezer compartment
If the variation ΔTfc of the maximum temperature is sufficiently small according to 3, it is judged to be a stable state (Step 14).

If the inside of the refrigerator is in a stable state, the temperature difference setting means 34 causes the compressor start temperature Tfcon and the stop temperature T
The temperature difference ΔT of fcoff is increased by a constant temperature Δt and set as shown in (Equation 2) (Step 15).

[0034]

[Equation 2]

If the inside of the refrigerator is not in a stable state, the compressor starting temperature Tfcon 'and the stopping temperature Tfcoff' set so that the temperature difference ΔT between the starting temperature and the stopping temperature of the compressor is increased by a constant temperature Δt are returned to the initial state. (Step1
6).

Then, the freezer compartment internal temperature determination means 21 determines, according to the temperature difference setting means 34, whether the internal compartment temperature Tfc is within the set temperatures Tfcon and Tfcoff of the freezer compartment (St.
ep17), based on this judgment, the compressor control means 2
2 controls ON / OFF of the compressor 17, and the fan control means 23 controls ON / OFF of the fan 14 (Step 18).

From the above, the temperature of the freezing compartment 8 is adjusted by sending the cold air of appropriate temperature into the freezing compartment 8. In this embodiment, the maximum temperature detecting means 30 and the maximum temperature change calculating means 32 may be the minimum temperature detecting means and the minimum temperature change calculating means, respectively.

Next, a control device for a refrigerator / freezer according to a second embodiment of the present invention will be described with reference to the drawings. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 3 is a functional block diagram of a controller for a refrigerator / freezer according to a second embodiment of the present invention. FIG. 4 is a flowchart showing the operation of the embodiment.

In FIG. 3, numeral 35 is a day / night judging means, which has a built-in 24-hour timer. The nighttime is detected by the output of this timer, and the temperature difference setting means 34 sets the temperature difference between the starting temperature and the stop temperature of the compressor 17 by the output of the daytime determining means 35.

The operation of the refrigerator-refrigerator control device configured as described above will be described below with reference to FIGS. 3 and 4.

First, the freezing compartment internal temperature detecting means 20 detects the internal compartment temperature Tfc in the freezing compartment by means of the freezing compartment internal temperature sensor 19 (Step 21).

When night is detected by the timer inside the day / night judging means 35 (Step 22), the temperature difference setting means 34
Compressor start temperature Tfcon and stop temperature Tfcof
The temperature difference ΔT of f is increased by a constant temperature Δt and set as shown in (Equation 2) (Step 23).

When the daytime is detected by the timer inside the day / night judging means 35, the compressor start temperature Tfcon 'and the stop temperature Tfcoff' are set so that the temperature difference ΔT between the compressor start temperature and the stop temperature is increased by a constant temperature Δt. Return to the initial state (Step 24).

Then, the freezing room internal temperature determination means 21 is
According to the output of the temperature difference setting means 34, it is judged whether the internal temperature Tfc is within the set temperatures Tfcon and Tfcoff of the freezing room (Step 25). Based on this judgment, the compressor control means 22 turns the compressor 17 ON. ON / OFF is controlled, and the fan control means 23 controls ON / OFF of the fan 14 (Step 26).

From the above, the temperature of the freezing compartment 8 is adjusted by sending the cold air of appropriate temperature into the freezing compartment 8. In addition, in the present embodiment, the day / night determining means 35 uses the timer to detect the night, but the day / night determining means 35 may be an optical sensor or an outside air temperature sensor.

Next, a control device for a refrigerator / freezer according to a third embodiment of the present invention will be described with reference to the drawings. The same components as those in the first and second embodiments are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 5 is a functional block diagram of a controller for a refrigerator / freezer according to a third embodiment of the present invention. FIG. 6 is a flowchart showing the operation of the embodiment.

In FIG. 5, reference numeral 36 is a door switch arranged on the front surface of the freezer compartment 8. 37 is a door switch 36
Is a door opening / closing detecting means for detecting the opening / closing of the door 5 from the output of.

38 is a door opening / closing detecting means 37 and a timer B3.
It is a door opening / closing frequency calculating means for calculating the opening / closing frequency of the door 5 for each time from the output of 9. Reference numeral 40 is a memory that stores the average number of times of opening and closing the door during the time period from the past.

Reference numeral 41 is an average door opening / closing frequency calculating means for calculating the average door opening / closing frequency in the time zone from the outputs of the door opening / closing frequency calculating means 38 and the memory 40.

Reference numeral 42 is an unused time zone determination means for detecting a time zone in which the number of times of use is small, from the average number of doors opened / closed during that time period up to the previous day.

The temperature difference setting means 34 sets the temperature difference between the starting temperature and the stopping temperature of the compressor 17 based on the output of the unused time zone judging means 42.

The operation of the refrigerator-refrigerator control device configured as described above will be described below with reference to FIGS. 5 and 6.

First, the freezing compartment internal temperature detecting means 20 detects the internal compartment temperature Tfc in the freezing compartment by means of the freezing compartment internal temperature sensor 19 (Step 31).

The door opening / closing detecting means 36 is a door switch 36.
Thus, the opening / closing of the door 5 is detected (Step 32).

When the door is opened / closed, the door open / closed number detecting means 38 adds it to the door open / closed number n in each time zone (Step 33).

When a certain period of time elapses by the timer B39 (Step 34), the average door opening / closing frequency calculating means 41 outputs the door opening / closing frequency n output from the door opening / closing frequency calculation means 38 and the past time in the memory 40. The average number of times of opening and closing the door N for the time period is calculated from the average number of times of opening and closing the door N (Step 35).

Then, the average number of times of opening and closing the door N'of that time period is updated to the average number of times of opening and closing the door N of the past time period in the memory 40 (Step 36), and the number of times of opening and closing the door n of the door opening and closing number calculation means 38 is set. The count of the timer B39 is cleared (Step 37).

When the door is not opened / closed (Step 3
2) The unused time zone determination means 42 reads the average number N of doors opened / closed in the past time zone from the memory 40, and determines the time zone in which the average number of doors opened / closed is small (Step 3).
8).

If the average door opening / closing number N is small, the temperature difference setting means 34 increases the temperature difference ΔT between the starting temperature Tfcon and the stop temperature Tfcoff of the compressor by a constant temperature Δt and sets it as shown in (Equation 2). Yes (Step 39).

When the unused time zone determination means 42 determines a time zone in which the average number of times of opening and closing of the door is large, the temperature difference ΔT between the compressor start temperature and the stop temperature ΔT is set so as to increase by a constant temperature Δt. And the stop temperature Tfcoff 'is returned to the initial state (Step 40).

Then, the freezing room internal temperature determination means 21 is
According to the output of the temperature difference setting means 34, it is judged whether the internal temperature Tfc is within the range of the set temperature of the freezer (Tfcon: compressor, fan start temperature, Tfcoff: compressor, fan stop temperature) (Step 41). Based on this judgment, the compressor control means 22 determines that the O of the compressor 17 is 0.
N / OFF is controlled, and the fan control means 23 controls the fan 14
ON / OFF of is controlled (Step 42).

Next, a control device for a refrigerator / freezer according to a fourth embodiment of the present invention will be described with reference to the drawings. The same components as those in the first, second, and third embodiments are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 7 is a functional block diagram of a controller for a refrigerator / freezer according to a fourth embodiment of the present invention. FIG. 8 is a flowchart showing the operation of the embodiment.

In FIG. 7, reference numeral 43 is a timer C for measuring the opening / closing time of the door 5. Reference numeral 44 is a door opening / closing time calculating means for calculating the opening / closing time of the door 5 for each time from the outputs of the timer C43 and the timer B39. Reference numeral 45 is a memory B that stores the average door opening / closing time of the time zone.

Reference numeral 46 is an average door opening / closing time calculating means for calculating the average door opening / closing time of the time zone from the outputs of the door opening / closing time calculating means 44 and the memory B45.

Reference numeral 47 is a door opening / closing time determining means for detecting a time slot having a small opening / closing time from the past average door opening / closing time of the time slot.

The temperature difference setting means 34 sets the temperature difference between the start temperature and the stop temperature of the compressor 17 based on the output of the door open / close time determination means 47.

The operation of the refrigerator-refrigerator control device configured as described above will be described below with reference to FIGS. 7 and 8.

First, the freezing compartment internal temperature detecting means 20 detects the internal compartment temperature Tfc in the freezing compartment by means of the freezing compartment internal temperature sensor 19 (Step 51).

The door opening / closing detecting means 36 is a door switch 36.
Thus, the opening / closing of the door 5 is detected (Step 52).

When the door is opened / closed, the door open / close time calculating means 38 adds the output from the timer C43 to the door open / close time m in each time zone (Step 53).

When a certain time has elapsed by the timer B39 (Step 54), the average door opening / closing time calculating means 46 outputs the door opening / closing time m in the time zone output from the door opening / closing time calculating means 44 and the past time in the memory B45. The average door opening / closing time M ′ of the time zone is calculated from the average door opening / closing time M of the zone (Step 55).

Then, the average door opening / closing time M'in that time zone is updated to the average door opening / closing time M in the past time zone in the memory B45 (Step 56), and the door opening / closing time m of the door opening / closing time calculation means 44 is set. The count of the timer B39 is cleared (Step 57).

When the door is not opened / closed (Step 5
2) The average door opening / closing time M in the past time zone is read from the memory B45 by the door opening / closing time determination means 47,
Determine the time when the average door opening / closing time is short (Step
58).

If the average door opening / closing time m is short, the temperature difference ΔT between the compressor start temperature Tfcon and the stop temperature Tfcoff is increased by the constant temperature Δt by the temperature difference setting means 34 and set as shown in (Equation 2). Yes (Step 59).

When the door opening / closing time determining means 47 determines a time period during which the average door opening / closing time is long, the temperature difference ΔT between the starting temperature and the stopping temperature of the compressor is set to the compressor starting temperature Tfcon 'which is set to be larger by the constant temperature Δt. The stop temperature Tfcoff 'is returned to the initial state (Step 60).

Then, the freezer compartment internal temperature determination means 21 is
According to the output of the temperature difference setting means 34, it is judged whether the internal temperature Tfc is within the range of the set temperature of the freezer (Tfcon: compressor, fan start temperature, Tfcoff: compressor, fan stop temperature) (Step 61). Based on this judgment, the compressor control means 22 determines that the O of the compressor 17 is 0.
N / OFF is controlled, and the fan control means 23 controls the fan 14
ON / OFF of is controlled (Step 62).

[0080]

As described above, according to the present invention, the temperature inside the freezer compartment provided in the freezer compartment and the temperature inside the freezer compartment where the temperature inside the freezer compartment is detected by the temperature sensor inside the freezer compartment. Detection means, maximum temperature detection means for detecting the maximum temperature in one cycle of the inside temperature detected by the freezer compartment temperature detection means, timer A, maximum temperature detection means and output of the timer A Maximum temperature change calculating means for calculating the temperature change of the maximum temperature within a certain time by means, freezing room temperature stable state detecting means for detecting a stable state in the freezer from the output of the maximum temperature change calculating means, freezing room The temperature difference setting means for setting the temperature difference between the start temperature and the stop temperature of the compressor by the output of the internal temperature stable state detecting means, and the compressor control by the freezer compartment internal temperature detecting means and the temperature difference setting means. Since constituting the refrigerator control unit and a power sale compressor control means, the inside temperature stabilization time is
By increasing the difference between the starting temperature and the stopping temperature of the compressor, it is possible to reduce the number of times of starting the compressor without lowering the food freshness-keeping ability of the freezer-refrigerator and save energy.

Further, according to the present invention, a temperature sensor inside the freezer compartment provided in the freezer compartment, a temperature detecting means inside the freezer compartment for detecting the temperature inside the freezer compartment by the temperature sensor inside the freezer compartment, and day and night A compressor is controlled by a judging means, a temperature difference setting means for setting a temperature difference between a start temperature and a stop temperature of the compressor based on the output of the day / night judging means, the freezer compartment temperature detecting means and the temperature difference setting means. Since the controller of the refrigerator / freezer consisting of the compressor control means is configured, when the temperature inside the refrigerator is stable at night, the food freshness-keeping ability of the refrigerator / freezer is reduced by increasing the difference between the starting temperature and the stopping temperature of the compressor. It is possible to reduce the number of times the compressor is started and save energy.

Further, according to the present invention, a freezer compartment internal temperature sensor provided in the freezer compartment, a freezer compartment internal temperature detecting means for detecting the internal compartment temperature in the freezer compartment by the freezer compartment internal temperature sensor, and a freezing compartment A door switch provided on the front of the room, a door opening / closing detection means for detecting the opening / closing of the freezer compartment by the door switch, a door opening / closing calculation means for calculating the number of times of opening / closing of the door, a timer B for calculating a fixed time, and An average door opening / closing frequency calculating means for calculating the average door opening / closing frequency for each hour, a memory for storing the average door opening / closing frequency in the past time period, and a memory for judging the door opening / closing frequency in the time period from the memory Control of the compressor by the use time zone determining means, the temperature difference setting means for setting the temperature difference between the start temperature and the stop temperature of the compressor, the freezer compartment temperature detecting means and the temperature difference setting means. Since the control unit for the refrigerator / freezer is configured from the compressor control means to perform, it detects when the inside of the refrigerator is stable according to the usage conditions, and when the inside of the refrigerator is stable, the difference between the start temperature and the stop temperature of the compressor is increased. It is possible to save energy by reducing the number of times the compressor is started without lowering the food freshness-keeping ability of the refrigerator / freezer.

Further, according to the present invention, a freezer compartment internal temperature sensor provided in the freezer compartment, a freezer compartment internal temperature detecting means for detecting the internal compartment temperature in the freezer compartment by the freezer compartment internal temperature sensor, and a freezing compartment A door switch provided on the front of the room, a door opening / closing detecting means for detecting the opening / closing of the freezing room by the door switch, a timer C for calculating the door opening time, and a door opening / closing time calculating means for calculating the door opening / closing time. , A timer B for calculating a fixed time, an average door opening / closing time calculating means for calculating an average door opening / closing time for each time, a memory B for storing an average door opening / closing time in the past, Door opening / closing time determination means for determining the past average door opening time, temperature difference setting means for setting the temperature difference between the start temperature and the stop temperature of the compressor, the freezer compartment internal temperature detection means, and the temperature Since the control device for the refrigerator / freezer is composed of the freezer compartment internal temperature determination means for determining whether the internal temperature is within the set temperature range by the difference setting means, and the compressor control means for controlling the compressor, the usage status Detecting when the inside of the refrigerator is stable, and when the inside of the refrigerator is stable, by increasing the difference between the start temperature and the stop temperature of the compressor,
It is possible to reduce the number of times the compressor is started and save energy without lowering the food freshness retaining ability of the freezer / refrigerator.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a first embodiment of a control device for a refrigerator-freezer according to the present invention.

FIG. 2 is a flowchart showing the operation of the control device for the refrigerator / freezer of the same embodiment.

FIG. 3 is a functional block diagram of a second embodiment of a control device for a refrigerator / freezer according to the present invention.

FIG. 4 is a flowchart showing an operation of the control device for the refrigerator-freezer of the same embodiment.

FIG. 5 is a functional block diagram of a third embodiment of a control device for a refrigerator / freezer according to the present invention.

FIG. 6 is a flowchart showing the operation of the control device for the refrigerator / freezer of the same embodiment.

FIG. 7 is a functional block diagram of a fourth embodiment of a control device for a refrigerator-freezer according to the present invention.

FIG. 8 is a flowchart showing the operation of the control device for the refrigerator-freezer according to the embodiment.

FIG. 9 is a functional block diagram of a conventional refrigerator-freezer control device.

FIG. 10 (a) is a flow chart showing the operation of the freezer compartment control of the conventional freezer-freezer control apparatus. (B) is a flow chart showing the operation of the refrigerating compartment control of the conventional freezer-refrigerator control apparatus.

[Explanation of symbols]

 Reference numeral 19 Refrigerator interior temperature sensor 20 Refrigerator interior temperature detecting means 21 Refrigerator interior temperature determining means 22 Compressor control means 33 Refrigerator interior temperature stable state detecting means 34 Temperature difference setting means 35 Day / night determining means 36 Door switch 37 Door opening / closing detecting means 38 Door opening / closing frequency calculating means 39 Timer B 41 Average door opening / closing frequency calculating means 42 Unused time period calculating means 44 Door opening / closing time calculating means 46 Average door opening / closing time calculating means 47 Door opening / closing time determination means

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shigeru Mori 3-22 Takaidahondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerator Co., Ltd. 22-chome Matsushita Cold Machinery Co., Ltd.

Claims (4)

[Claims] 1. A freezing compartment internal temperature sensor provided in the freezing compartment, a freezing compartment internal temperature detecting means for detecting the internal compartment temperature in the freezing compartment by the freezing compartment internal temperature sensor, and the inside of the freezing compartment Temperature stable state detecting means for detecting the stable state of the freezer compartment by the temperature detecting means, and temperature for setting the temperature difference between the starting temperature and the stop temperature of the compressor by the output of the stable temperature detecting state of the freezer compartment A difference setting means, a freezer compartment internal temperature determination means for determining whether the internal compartment temperature is within a set temperature range by the freezer compartment internal temperature detection means and the temperature difference setting means, and a compressor for controlling the compressor. A control device for a refrigerator-freezer comprising a control means. 2. A freezer compartment internal temperature sensor provided in the freezer compartment, a freezer compartment internal temperature detection means for detecting an internal compartment temperature in the freezer compartment by the freezer compartment internal temperature sensor, and day / night determination. A day / night judging means, a temperature difference setting means for setting a temperature difference between a start temperature and a stop temperature of a compressor by an output of the day / night judging means, a freezer compartment internal temperature detecting means and a temperature difference setting means A refrigerating / refrigerating control device comprising a freezer compartment internal temperature determination means for determining whether a temperature is within a set temperature range and a compressor control means for controlling a compressor. 3. A freezer compartment internal temperature sensor provided in the freezer compartment, a freezer compartment internal temperature detection means for detecting an internal compartment temperature in the freezer compartment by the freezer compartment internal temperature sensor, and a front compartment of the freezer compartment. Door switch, a door opening / closing detection means for detecting the opening / closing of the freezer compartment by the door switch, a door opening / closing frequency calculating means for calculating the door opening / closing frequency based on the output from the door opening / closing detection means, and a predetermined time Timer, an average door opening / closing number calculating means for calculating the average number of times of opening / closing of each time, an unused time zone determining means for determining a time zone in which the door opening / closing number is small from the average door opening / closing number calculating means, and a compressor. Whether the temperature inside the refrigerator is within the set temperature range by the temperature difference setting means for setting the temperature difference between the start temperature and the stop temperature, the freezer compartment internal temperature detection means and the temperature difference setting means. A refrigerating / refrigerating machine control device comprising: a freezer compartment internal temperature determining means for determining whether the temperature is in the freezer compartment; 4. A freezer compartment internal temperature sensor provided in the freezer compartment, a freezer compartment internal temperature detecting means for detecting an internal compartment temperature in the freezer compartment by the freezer compartment internal temperature sensor, and a front compartment of the freezer compartment. Door switch, a door opening / closing detecting means for detecting opening / closing of the freezer compartment by the door switch, a door opening / closing time calculating means for calculating a door opening / closing time, a timer for calculating a fixed time, and an average for each time An average door opening / closing time calculating means for calculating a door opening / closing time, a door opening / closing time judging means for judging a time zone in which the door opening / closing time is small from the average door opening / closing time calculating means, and a temperature difference between a start temperature and a stop temperature of the compressor are calculated. A temperature difference setting means for setting, a freezer compartment temperature determination means for determining whether the refrigerator temperature is within the set temperature range by the freezer compartment temperature detection means and the temperature difference setting means, A refrigerator / freezer control device comprising a compressor control means for controlling a compressor.