JP5576668B2 - Cooling storage - Google Patents

Description

  The present invention relates to a cold storage having a plurality of storage chambers having different internal set temperatures.

  An example of this type of cold storage is a refrigerator-freezer. The refrigerator / freezer has a main body made of a heat insulating box and is divided into a refrigerator compartment and a freezer compartment by a heat insulating partition wall, and each compartment has a cooler that constitutes a part of an individually provided refrigeration cycle. The cooling fan is provided in each room, and in each room, the internal temperature detected by the internal thermistor and a preset internal temperature (for example, 5 ° C. in the refrigerator compartment and −25 in the freezer compartment). ℃), and the cooling operation and its stop are repeated depending on whether the detected temperature is higher or lower than the set temperature, so that each chamber is maintained substantially at the set temperature in the chamber. (For example, refer to Patent Document 1).

  The details of the above control operation will be described taking the refrigerator compartment side as an example. When the temperature detected by the internal thermistor rises to the upper limit of the internal set temperature, the compressor of the corresponding refrigeration cycle is operated, When the temperature falls to the lower limit value of the internal set temperature, the compressor is stopped. During the cooling operation, the inside air is heat-exchanged with the cooled cooler to generate cold air, and this cold air is circulated into the cold room by the cooling fan to cool the cold room. While the internal air passes through the cooler, the moisture in the internal air becomes frost and adheres to the cooler, that is, is dehumidified, so that the humidity in the refrigerator compartment decreases. On the other hand, when the cooling operation is stopped, the cooler itself is not cooled, so there is no dehumidifying function, and conversely, the frost melts and forms water droplets that are diffused into the refrigerator compartment by the cooling fan. There are circumstances to do.

JP 2000-220939 A

For example, if the ambient temperature at the position where the refrigerator / freezer is installed is low, the temperature rise of the refrigerating room is suppressed, so that the cooling operation is stopped for a long time, and as a result, the refrigerating room is likely to become high humidity as described above. However, when it did so, there existed a problem that dew condensation arises on the partition wall which partitions off between the freezer compartment controlled by low temperature.
The present invention has been completed based on the above circumstances, and an object thereof is to suppress dew condensation in a storage room having a higher internal set temperature.

  In the present invention, a plurality of storage chambers are formed by partitioning a heat insulating partition wall in a storage body composed of a heat insulating box, and each storage chamber constitutes a part of an independent refrigeration cycle including a compressor. A cooler, a cooling fan, and an in-compartment thermistor for detecting the in-compartment temperature are set, and the in-compartment set temperature is set differently from each other. When the detected temperature inside the chamber reaches the upper limit value of the corresponding set temperature in the refrigerator, the compressor and cooling fan of the corresponding refrigeration cycle are operated, and when the lower limit value of the set temperature in the same chamber is reached, the compressor Refrigeration corresponding to the storage room with the higher set temperature in the storage in the cooling storage that is maintained at the corresponding set temperature in the store by executing the cooling control operation that repeatedly stops. cycle An operating condition detection unit that measures the stop time during the cooling control operation of the compressor is provided, and when the compressor stop time measured by the operation condition detection unit reaches the first predetermined time, the internal set temperature It is characterized in that a control means for operating the compressor and the cooling fan is provided on the condition that the detected temperature in the storage room of the higher storage room exceeds the lower limit value of the set temperature in the storage room. .

  In the above configuration, in the storage chamber with the higher internal set temperature, the corresponding compressor stop time elapses for the first predetermined time, and the internal detected temperature at that time exceeds the lower limit of the internal set temperature. Then, the compressor and the cooling fan are put into operation. As a result, dehumidification in the storage chamber with the higher internal set temperature is promoted and a high humidity state is prevented, and condensation may occur on the partition wall between the storage chamber with the lower internal set temperature. It is suppressed. Therefore, the food stored in the storage room having the higher internal temperature is prevented from getting wet, and can be stored more hygienically. Here, as the starting condition of the compressor, the fact that the detected temperature in the warehouse is above the lower limit value of the set temperature in the warehouse is a so-called overcooled state when the compressor is operated unconditionally, This is to avoid the concern that the stored items will freeze unnecessarily.

The following configuration may also be used.
(1) The control means, when the compressor detection time measured by the operating condition detection unit reaches the first predetermined time, the detection temperature in the storage is below the lower limit of the set temperature in the storage The compressor and the cooling fan are put into an operation state on the condition that the detected temperature in the refrigerator exceeds the lower limit value of the preset temperature in the chamber when the subsequent compressor stop time reaches the first predetermined time. It has a function.
If the detected temperature in the refrigerator is equal to or lower than the lower limit value of the set temperature when the compressor stop time reaches the first predetermined time, the compressor is not started. If the detected temperature inside the chamber exceeds the lower limit value of the set temperature inside the chamber when the first predetermined time is reached, the compressor and the cooling fan are put into operation. It is possible to prevent the room from being in a high humidity state while suppressing excessive cooling in the room.

(2) The control means has a function of stopping the cooling fan only for a second predetermined time immediately after the start of the compressor.
The cooling fan is stopped for the second predetermined time immediately after the start of the compressor, and the cooling fan is operated after the lapse of the same time. During the second predetermined time immediately after the start-up of the compressor, the cooler cools earlier because the internal air does not pass through the cooler, and the dehumidifying function can be more effectively exhibited when the cooling fan is operated. it can.

(3) The control means, when the compressor detection time measured by the operating condition detection unit reaches the first predetermined time, the detection temperature in the storage is less than or equal to the lower limit value of the set temperature in the storage The compressor is operated for a third predetermined time when the detected internal temperature exceeds the lower limit value of the internal set temperature during the subsequent stop of the compressor, and the cooling fan is stopped during the same time. It has a function to do.
When the compressor stop time reaches the first predetermined time and the detected temperature in the refrigerator is equal to or lower than the lower limit value of the preset temperature in the refrigerator, the compressor is kept stopped. Exceeds the lower limit value of the internal set temperature, the compressor is operated for a third predetermined time, and the cooling fan is stopped for the same time. A situation in which the dehumidifying function can be exerted early when the storage room with the higher internal set temperature goes to the high humidity state can be obtained, and the high humidity state can be more reliably avoided.

(4) An ambient temperature sensor for detecting the ambient temperature at the installation position of the cooling storage is provided, and when the detected temperature of the ambient temperature sensor is equal to or lower than a predetermined temperature, the storage chamber with the higher internal set temperature is used. Correction means is provided for correcting so as to lower the upper limit value of the set temperature in the cabinet.
When the ambient temperature detected by the ambient temperature sensor is lower than the specified temperature in the storage room with the higher chamber set temperature, the upper limit of the chamber set temperature, which is the temperature at which the compressor switches from the stopped state to the restarted operation state. Is revised downward. Thereby, the stop time of a compressor is shortened and it is prevented more reliably that the same room will be in a high humidity state.

  ADVANTAGE OF THE INVENTION According to this invention, the dew condensation in the store room with a higher internal set temperature can be suppressed.

Partially cutaway front view of a refrigerator-freezer according to Embodiment 1 of the present invention II-II sectional view of FIG. Configuration diagram of refrigeration cycle Block diagram of condensation control mechanism Condensation suppression control timing chart Timing chart of dew condensation suppression control according to Embodiment 2 The block diagram of the dew condensation suppression control mechanism concerning Embodiment 3. Condensation suppression control timing chart

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a four-door refrigerator-freezer is illustrated.
As shown in FIGS. 1 and 2, the refrigerator / freezer has a main body 10 made of a slightly vertically long heat insulating box with a front opening. Inside the main body 10, a heat insulating partition wall is provided at the center in the frontage direction. 11, the refrigerator compartment 12R is formed on the left side as viewed from the front, and the freezer compartment 12F is formed on the right side. A double-spread type heat insulating door 13 is attached to the front opening of the main body 10 in two upper and lower stages. The main body 10 is supported by four illustrated legs 14 arranged on the bottom surface, and a machine room 16 is formed on the upper surface of the main body 10 by being surrounded by a panel.

  The refrigerator compartment 12R and the freezer compartment 12F are equipped with independent refrigeration cycles 20R and 20F, respectively. As shown in FIG. 3, the refrigeration and freezing refrigeration cycles 20R and 20F are respectively compressors 21R and 21F, condensers 22R and 22F, dryers 23R and 23F, capillary tubes 24R and 24F as expansion valves, and coolers. (Evaporator) 25R and 25F are formed by circulating connection with refrigerant pipes. Each condenser 22R, 22F is equipped with condenser fans 26R, 26F.

When the refrigerating cycle is arranged on the refrigerator compartment 12R side as an example, as shown in FIG. 2, the heat insulating base 31 is provided so as to close the window hole 30 opened in the ceiling wall of the refrigerator compartment 12R. A refrigeration device 28R including a compressor 21R, a condenser 22R, and the like is placed on the base 31, and a cooler 25R is suspended and attached to the lower surface side.
On the other hand, an air duct 33 that also serves as a drain pan is stretched on the lower surface side of the window hole 30 in the ceiling portion of the refrigerator compartment 12R, thereby forming a cooler chamber 34. The cooler 25R is housed in the cooler chamber 34, and a suction port 36 is provided on the front side (left side in the figure) of the air duct 33 and a cooling fan 37R is provided. Is provided with an outlet 38.
Therefore, when the cooling fan 37R is driven, the air in the refrigerating chamber 12R is sucked into the cooler chamber 34 from the suction port 36 and circulates through the cooler 25R as shown by the arrow in FIG. A circulating flow is generated such that it is blown out toward the refrigerator compartment 12R.
In addition, the arrangement structure of the refrigeration cycle 20F on the freezer compartment 12F side and the circulation and circulation mode of air are the same as those on the refrigerator compartment 12R side.

  The basic cooling control operation is performed as follows. As shown in FIG. 4, the thermistors 41R and 41F that detect the temperatures in the refrigerator compartment 12R and the freezer compartment 12F are connected to the control device 40 equipped with a microcomputer, a timer, and the like. It is arranged upstream of the coolers 25R and 25F in the chamber 34. On the other hand, the internal set temperature TR, TF of the refrigerator compartment 12R and the freezer compartment 12F can be input by the internal preset temperature input section 42. For example, the refrigerator compartment 12R is “5 ° C.” and the freezer compartment 12F is “−”. "25 ° C".

On the refrigerator compartment 12R side, the cooling fan 37R is driven, and as shown in the timing chart of FIG. 5, the detected temperature Tk by the internal thermistor 41R is the upper limit value TR_u (TR + 1.7K) of the internal set temperature. ), The compressor 21R of the corresponding refrigeration cycle 20R is operated. When the compressor 21R is lowered to the lower limit value TR_d (TR-2K) of the internal set temperature, the compressor 21R is stopped. The internal temperature of the chamber 12R is substantially maintained at the set temperature TR.
Even in the freezer compartment 12F side, the cooling fan 37F is driven, and when the temperature detected by the internal thermistor 41F rises to the upper limit value TF_u (TF + 2K) of the internal set temperature, the compressor 21F of the corresponding refrigeration cycle 20F is operated. The compressor 21F is stopped when it falls to the lower limit value TF_d (TF-2K) of the internal set temperature, and this operation is repeated so that the internal temperature of the freezer compartment 12F is substantially maintained at the set temperature TF. It has become.

Further, the defrosting operation is appropriately performed in the middle of the cooling control operation, and is performed, for example, every 6 hours based on an instruction from the 24-hour timer.
Regarding the defrosting operation, the freezer compartment 12F side is a heating type using the defrost heater 44, and the refrigerator compartment 12R side is an off-cycle type. More specifically, as shown in the timing chart of FIG. 5, in the freezer compartment 12F, the compressor 21F and the cooling fan 37F are stopped, while the defrost heater 44 provided in the cooler 25F is turned on. During this time, the temperature of the cooler 25F is detected by the defrosting thermistor 46F. When the temperature rises to a predetermined temperature, it is considered that frosting has disappeared and the defrosting heater 44 is turned off. The cooling control operation is resumed when the minute draining time has elapsed. In addition, the air duct 33 (drain pan) that receives the defrost water and the heater 45 that is provided in the drain pipe 35 are on-controlled during the defrost operation.
In the refrigerator compartment 12R, the compressor 21R of the refrigeration cycle 20R is stopped, and monitoring control is performed until the cooler 25R reaches a predetermined temperature by the defrosting thermistor 46R. During this time, the cooling fan 37R is continuously operated. When the defrosting thermistor 46R detects a predetermined temperature, it is determined that the defrosting is completed, and the compressor 21R is activated to return to the cooling control operation.

  In this embodiment, during the cooling control operation on the refrigerating room 12R side, the dew condensation suppression control in the room 12R is executed. For example, if the ambient temperature at the position where the refrigerator-freezer is installed is low, the stop time of the compressor 21R on the refrigerator compartment 12R side (the time from when the compressor 21R is turned off to when it is turned on again) tends to become longer, In view of the fact that the humidity inside the chamber is increased and the dew condensation is likely to occur on the partition wall 11 between the freezer compartment 12F and the like, the stop time of the compressor 21R is shortened in order to suppress the occurrence of such dew condensation. Measures are taken.

As a countermeasure, when the ambient temperature is low, the upper limit value of the internal set temperature for turning on the compressor 21R in the refrigerator compartment 12R is lowered.
Therefore, an ambient temperature sensor is connected to the input side of the control device 40 so as to detect the ambient temperature, and the ambient temperature sensor is provided in the condenser 22F in the refrigeration cycle 20F on the freezer compartment 12F side. The clogged thermistor 47 is used. The detection temperature Ts of the clogging thermistor 47 30 seconds before the end of draining during the defrosting operation on the freezer compartment 12F side is considered to be substantially the same as the outside air temperature (ambient temperature), and the detection temperature Ts of the clogging thermistor 47 is It is fake with temperature.

When the detected temperature Ts of the clogging thermistor 47 is equal to or lower than a predetermined temperature (for example, 15 ° C.), the controller 40 corrects the upper limit value TR_u so as to correct the upper limit value TR_u of the inside temperature of the refrigerator compartment 12R. A portion 50 is provided. Specifically, when the ambient temperature Ts becomes “15 ° C.” or lower, the upper limit value TR_u of the internal set temperature is corrected from “internal set temperature TR + 1.7K” to “internal set temperature TR + 0.3K”. At the same time, the dew condensation suppression control is started.
Here, when the timing at which the ambient temperature Ts is detected to be “15 ° C.” or less is in the defrosting operation on the refrigerator compartment 12R side, the defrosting operation is terminated and the cooling control operation is started. Then, the dew condensation suppression control is started. If the same timing is after the defrosting operation is completed on the refrigerator compartment 12R side, the dew condensation suppression control is started from the same timing.

In addition to the above, a compressor correction control unit 51 is provided. The compressor correction control unit 51 is provided with an operation state detection unit 52. In the operation state detection unit 52, when the cooling control operation is performed in the refrigerator compartment 12R, the stop time of the compressor 21R is stopped. It has come to be measured. In the compressor correction control unit 51, when the stop time of the compressor 21R measured by the operation state detection unit 52 reaches the first predetermined time t1 (50 minutes), the temperature detected by the internal thermistor 41R is Tk. However, the compressor 21R is forcibly started on condition that it is equal to or higher than the lower limit value TR_d (TR-2K) of the internal set temperature.
When the detected temperature Tk by the internal thermistor 41R is lower than the lower limit value TR_d (TR-2K) of the internal set temperature when the stop time of the compressor 21R is continued for the first predetermined time t1 (50 minutes). The compressor 21R remains in the stopped state, but the stop time of the compressor 21R is again measured, and the operation control of the compressor 21R described above is performed.

Further, a cooling fan correction control unit 53 is provided. In the cooling fan correction control unit 53, after the above-described dew condensation suppression control is started, when the compressor 21R is restarted from the stopped state, the cooling fan 37R is set to the second predetermined time t2 (for example, 3 minutes). It is supposed to be stopped. However, when the operation of the compressor 21R is stopped in less than 3 minutes, the cooling fan 37R is restarted together with the stop of the compressor 21R.
The above dew condensation suppression control is canceled at the start of the next defrosting operation.

An example of the operation of the present embodiment will be described based on the timing chart of FIG.
The defrosting operation was started simultaneously in the freezer compartment 12F and the refrigerator compartment 12R, and the detection temperature Ts of the clogging thermistor 47 30 seconds before the end of draining during the defrosting operation on the freezer compartment 12F side was “15 ° C. or lower”. Then, it is determined that the stop time of the compressor 21R on the refrigerator compartment 12R side is prolonged due to the low ambient temperature, leading to an increase in the internal humidity, and the dew condensation suppression control is started.
Upon entering this control, the upper limit value TR_u of the internal set temperature is corrected to “internal set temperature TR + 0.3K”, and the timing at which the compressor 21R is turned on again after being stopped is advanced (see the latter half of the same timing chart). .

  On the other hand, the operating state of the compressor 21R after the start of the cooling control operation in the refrigerator compartment 12R is detected, the stop time of the compressor 21R is continued for the first predetermined time t1 (50 minutes), and the internal thermistor If the detected temperature Tk by 41R is equal to or higher than the lower limit value TR_d (TR-2K) of the internal set temperature, the compressor 21R is forcibly started. When the inside detection temperature Tk reaches the lower limit value TR_d (TR-2K) of the inside set temperature, the compressor 21R is stopped.

In other words, the upper limit value TR_u of the internal set temperature is corrected downward and the timing at which the compressor 21R is started is advanced, and if the stop time of the compressor 21R on the refrigerator compartment 12R side is long, the compressor 21R is forcibly compressed. As a result, the operating rate of the compressor 21R is increased, so that dehumidification in the refrigerator compartment 12R is promoted and a high humidity state is prevented. Therefore, dew condensation on the partition wall 11 between the freezer compartment 12F and the refrigerator compartment 12R is suppressed, and the food stored in the refrigerator compartment 12R is prevented from getting wet and can be preserved more hygienically. It becomes.
In addition, as the starting condition of the compressor 21R based on the stop time of the compressor 21R, the fact that the inside detection temperature Tk exceeds the lower limit value TR_d of the inside set temperature is taken unconditionally. This is in order to avoid a situation in which the stored product becomes too cold when it is operated, and the stored item may be frozen unnecessarily.

  When the compressor 21R is restarted from the stopped state after the dew condensation suppression control is started, the cooling fan 37R is stopped for the second predetermined time t2 (3 minutes), provided that the compressor 21R is 3 minutes. When the operation is stopped at less than this, the cooling fan 37R is stopped only during the operation of the compressor 21R. Thereby, during the second predetermined time t2 immediately after the start of the compressor 21R, the cooler 25R becomes low temperature because the internal air does not pass through the cooler 25R, and the dehumidifying function is more effective when the cooling fan 37R is operated. Can be demonstrated.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIG. The second embodiment should also be referred to as a modification of the first embodiment.
In the first embodiment, when the dew condensation suppression control is being executed, when the stop time of the compressor 21R continues for the first predetermined time t1 (50 minutes), the detected temperature Tk by the internal thermistor 41R is When the temperature is lower than the lower limit value TR_d (TR-2K) of the internal set temperature, the compressor 21R remains in the stopped state, and the stop time of the compressor 21R is counted again to control the operation of the compressor 21R. It was.

  On the other hand, in the second embodiment, the in-compartment detection temperature Tk is lower than the lower limit value TR_d (TR-2K) of the in-compartment set temperature when the stop time of the compressor 21R has passed the first predetermined time t1. When the stopped state of the compressor 21R is continued, if the inside detection temperature Tk exceeds the lower limit value TR_d (TR-2K) of the inside set temperature before the next first predetermined time t1, the At that time, the compressor 21R is forcibly operated for a third predetermined time t3 (at least 20 seconds). Conversely, the cooling fan 37R is stopped synchronously.

According to the control of the second embodiment, when the compressor 21R cannot be started after the stop time of the compressor 21R has passed the first predetermined time t1, before waiting for the next first predetermined time t1, The compressor 21R can be started immediately depending on the condition of the internal temperature. In other words, it is possible to obtain a situation where the dehumidifying function can be exerted early where the compressor 21R is stopped longer and the refrigerator compartment 12R goes to a high humidity state, and the inside of the chamber 12R is more reliably avoided. it can.
The reason why the operating time of the compressor 21R is set to a minimum of 20 seconds is that it is determined as the minimum time required for the oil in the refrigeration circuit 20R on the refrigerator compartment 12R side to return to the compressor 21R.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIGS.
In the third embodiment, it is the same that the dew condensation suppression control is executed during the cooling control operation on the refrigerator compartment 12R side, but the same control is executed without actually measuring the ambient temperature at the installation position of the refrigerator-freezer. It is like that.
The basic cooling control operation in the refrigerator compartment 12R will be described again with reference to the timing chart of FIG. While the cooling fan 37R is driven, when the detected temperature Tk by the internal thermistor 41R rises to the upper limit value TR_u (TR + 1.7K) of the internal set temperature, the compressor 21R is operated, and the lower limit value TR_d of the internal set temperature. When lowered to (TR-2K), the compressor 21R is stopped, and this operation is repeated, whereby the internal temperature of the refrigerator compartment 12R is substantially maintained at the set temperature TR.

  The control device 40A that executes the cooling control operation is provided with a compressor correction control unit 51 to execute the dew condensation suppression control, and the compressor correction control unit 51 executes the cooling control operation in the refrigerator compartment 12R. In this case, an operating state detection unit 52 for measuring the stop time of the compressor 21R is attached. In the compressor correction control unit 51, when the stop time of the compressor 21R measured by the operation state detection unit 52 reaches the first predetermined time t1 (50 minutes), the temperature detected by the internal thermistor 41R is Tk. However, it functions to forcibly start the compressor 21R on the condition that it is equal to or higher than the lower limit value TR_d (TR-2K) of the internal set temperature. From this time, the dew condensation suppression control is started. When the internal detection temperature Tk reaches the lower limit value TR_d (TR-2K) of the internal set temperature, the compressor 21R stops.

In addition, when the stop time of the compressor 21R continues for the first predetermined time t1 (50 minutes) after the start of the dew condensation suppression control, the detected temperature Tk by the internal thermistor 41R becomes the lower limit value TR_d of the internal set temperature. When it is lower than (TR-2K), the compressor 21R remains in a stopped state, the stop time of the compressor 21R is counted again, and the above-described operation control of the compressor 21R is performed.
On the other hand, if the in-compartment detection temperature Tk reaches the upper limit value TR_u (TR + 1.7K) of the in-compartment set temperature before the compressor stop time reaches the first predetermined time t1, the compressor 21R is activated. The dew condensation suppression control is released.

  Further, a cooling fan correction control unit 53 is provided. In the cooling fan correction control unit 53, after the above-described dew condensation suppression control is started, when the compressor 21R is restarted from the stopped state, the cooling fan 37R is set to the second predetermined time t2 (for example, 3 minutes). It is supposed to be stopped. However, when the operation of the compressor 21R is stopped in less than 3 minutes, the cooling fan 37R is restarted together with the stop of the compressor 21R.

An example of the operation of the present embodiment will be described based on the timing chart of FIG.
During the cooling control operation of the refrigerator compartment 12R, the operating state of the compressor 21R is detected, the stop time of the compressor 21R is continued for the first predetermined time t1 (50 minutes), and the detected temperature Tk by the internal thermistor 41R is If it is equal to or higher than the lower limit value TR_d (TR-2K) of the set temperature in the refrigerator, the compressor 21R is forcibly started, and at the same time, the dew condensation suppression control is started. Here, when the compressor 21R is restarted from the stopped state, the cooling fan 37R is stopped for the second predetermined time t2 (3 minutes). When the inside detection temperature Tk reaches the lower limit value TR_d (TR-2K) of the inside set temperature, the compressor 21R is stopped.
As the starting condition of the compressor 21R, the fact that the in-compartment detection temperature Tk is higher than the lower limit value TR_d of the in-compartment set temperature becomes a so-called overcooled state when the compressor 21R is operated unconditionally. This is to avoid the possibility that the stored items may freeze unnecessarily.

Next, when the stop time of the compressor 21R continues for the first predetermined time t1 (50 minutes) and the in-compartment detection temperature Tk is lower than the lower limit value TR_d (TR-2K) of the in-compartment set temperature, the compressor 21R remains stopped. Similarly, it is to avoid overcooling. At this time, the stop time of the compressor 21R is measured again, and when the first predetermined time t1 has elapsed, the internal detection temperature Tk is equal to or higher than the lower limit value TR_d (TR-2K) of the internal set temperature. The machine 21R is started, while the cooling fan 37R is stopped. Similarly, when the inside detection temperature Tk reaches the lower limit value TR_d (TR-2K) of the inside set temperature, the compressor 21R is stopped, but when the operation time of the compressor 21R is as short as 3 minutes or less. When the compressor 21R is stopped, the cooling fan 37R is restarted.
Subsequently, before the stop time of the compressor 21R reaches the first predetermined time t1 (for example, when 30 minutes have elapsed since the stop), the internal detection temperature Tk is the upper limit value TR_u (TR + 1.7K) of the internal set temperature. ), The compressor 21R is started, and the dew condensation suppression control is released, and the normal cooling control operation is executed.

According to the present embodiment, when the stop time of the compressor 21R on the refrigerating room 12R side is long, the compressor 21R is forcibly operated, and as a result, the operation rate of the compressor 21R increases. It is prevented that the dehumidification in the refrigerator compartment 12R is promoted to be in a high humidity state. Therefore, dew condensation on the partition wall 11 between the freezer compartment 12F and the refrigerator compartment 12R is suppressed.
When the compressor 21R is restarted from the stopped state after the dew condensation suppression control is started, the cooling fan 37R is stopped for the second predetermined time t2 (3 minutes), provided that the compressor 21R is 3 minutes. When the operation is stopped at a temperature lower than that, the cooling fan 37R is stopped only during the operation of the compressor 21R, so that the internal air is cooled by the cooler for the second predetermined time t2 immediately after the start of the compressor 21R. By not passing through 25R, the cooler 25R has a low temperature, and the dehumidifying function can be more effectively exhibited when the cooling fan 37R is operated.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Also in the third embodiment, as illustrated in the second embodiment, when the compressor stop time reaches the first predetermined time t1, the in-compartment detection temperature Tk becomes the lower limit value TR_d (TR− 2K), the compressor 21R is switched to the third predetermined time t3 when the in-compartment detection temperature Tk exceeds the lower limit value TR_d (TR-2K) of the in-compartment set temperature during the subsequent stop of the compressor 21R. Control may be performed such that the cooling fan 37R is stopped during operation and during the same time.

(2) The first predetermined time t1 of the compressor stop time referred to by the compressor correction control unit 51 is not limited to “50 minutes” exemplified in the embodiment, and can be arbitrarily set.
(3) When executed by the cooling fan correction control unit 53, the second predetermined time t2 when the cooling fan 37R is stopped when the compressor 21R is restarted from the stopped state is “3 minutes” exemplified in the embodiment. Not limited to this, it can be set arbitrarily.

(4) The ambient temperature Ts is merely an example to correct the upper limit value TR_u of the in-compartment set temperature of the refrigerator compartment 12R illustrated in the first and second embodiments, and can be arbitrarily set. In addition, the amount of decrease in the upper limit can be changed.
(5) In the above embodiment, the case where the defrosting operation of the refrigerating room 12R is performed in an off-cycle format is exemplified, but a heating format using a defrost heater may be used.
(6) The present invention is not limited to the refrigerator-freezer exemplified in the above embodiment, and is applied to all cooling storages in which a plurality of storage chambers are formed in the main body and can be cooled to different set temperatures. Is possible.

  DESCRIPTION OF SYMBOLS 10 ... Main body 11 ... Partition wall 12R ... Refrigeration room (storage room with higher set temperature in the cabinet) 12F ... Freezer room 20R, 20F ... Refrigeration cycle 21R, 21F ... Compressor 25R, 25F ... Cooler 37R, 37F ... Cooling Fan 40, 40A ... Control device 41R, 41F ... Inside thermistor 42 ... Inside temperature setting unit 47 ... Clogging thermistor (ambient temperature sensor) 50 ... Upper limit correction unit 51 ... Compressor correction control unit 52 ... Operating condition detection 53: Cooling fan correction controller

Claims (4)

A plurality of storage chambers are formed by partitioning a heat insulating partition wall in a storage body composed of a heat insulating box, and each storage chamber includes a cooler constituting a part of an independent refrigeration cycle including a compressor. The cooling fan, the timer, and the internal thermistor for detecting the internal temperature are provided, and the internal set temperature is set differently from each other.
In each storage room, when the temperature detected by the internal thermistor reaches the upper limit value of the corresponding internal set temperature, the compressor and cooling fan of the corresponding refrigeration cycle are operated, and the internal set temperature is reached. When the cooling control operation that repeats that the compressor stops when the lower limit value is reached, the interior is maintained at the corresponding interior set temperature ,
Based on the time detected by the timer , in the cooling storage where the compressor is stopped and the defrosting operation is performed during the cooling control operation ,
An operating state detection unit for measuring a stop time during the cooling control operation of the compressor of the refrigeration cycle corresponding to the storage room having a higher internal set temperature is provided,
When the compressor stop time measured by the operating condition detection unit reaches the first predetermined time, the detected temperature in the storage chamber having the higher set temperature in the store exceeds the lower limit of the set temperature in the store. first control means for performing the function of by the compressor on condition that has a cooling fan and an operating state is provided,
The defrosting operation is a heating type using a defrost heater in the storage chamber having a lower internal set temperature, and after the operation of the defrost heater is finished, the defrosting is performed after the standby time has elapsed. Ending the operation and starting the cooling control operation,
After the operation of the defrosting heater is finished, after a predetermined time within the waiting time has elapsed, temperature detection is performed by a clogging thermistor equipped in the condenser in the refrigeration cycle of the storage room having the lower internal set temperature. Is supposed to be
The control means corrects to lower the upper limit value of the set temperature in the storage chamber having the higher set temperature in the store when the temperature detected by the clogging thermistor is equal to or lower than a predetermined temperature. Further comprising
Further, the correction of the set temperature upper limit value by the second function is performed after the defrosting operation is completed and the cooling control operation is started in the storage chamber having the higher internal set temperature. Characteristic cooling storage.   When the compressor detection time measured by the operating state detection unit reaches the first predetermined time, the control means, when the internal detection temperature is below the lower limit value of the internal set temperature, Provided with a function of operating the compressor and the cooling fan on the condition that the detected temperature in the refrigerator exceeds the lower limit value of the preset temperature in the chamber when the compressor stop time reaches the first predetermined time. The cooling storage according to claim 1, wherein   The cooling storage according to claim 1 or 2, wherein the control means has a function of stopping the cooling fan only for a second predetermined time immediately after the start of the compressor.   When the compressor detection time measured by the operating state detection unit reaches the first predetermined time, the control means, when the internal detection temperature is below the lower limit value of the internal set temperature, A function of operating the compressor for a third predetermined time when the inside detection temperature exceeds a lower limit value of the inside set temperature during the stop of the compressor, and stopping the cooling fan during the same time. The cooling storage according to claim 1, further comprising:

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