JP2002286348A - Method for controlling radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for controlling a radiator to discharge exhaust heat to the outside when a heat exhausting apparatus, e.g. a refrigerator, is built in a system. SOLUTION: Exhaust heat temperature corresponding to the operating state of a heat exhausting apparatus is detected, and when the exhaust heat temperature is higher than a set threshold, the radiator operates in an intermittent high speed operation mode with high heating capacity. When the exhaust heat temperature is lower than the threshold, the radiator operates in an intermittent low speed operation mode with low heating capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to radiate the heat exhausted from a device to the outside when a device such as a refrigerator is installed in a system storage constituting a system kitchen or the like. The present invention relates to a method for controlling a heat radiating device.

[0002]

2. Description of the Related Art For example, when a refrigerator is incorporated in a system storage, it is necessary to construct a path for discharging the exhaust heat of the refrigerator to the outside. As a prior art for realizing this, as shown in FIG. 7, a heat radiation space 3 is formed between a refrigerator 1 and a storage cabinet 2 disposed above the refrigerator 1 while securing a required volume. I have. A louver body 4 is provided on the front side of the heat radiating space 3 so as to alleviate the uncomfortable feeling that the heat radiating space 3 exists. With this configuration, the exhaust heat from the refrigerator 1 is discharged to the outside from the heat radiation space 3 through the louver body 4, so that a system kitchen in which the refrigerator is incorporated in the system storage can be configured.

However, in order to obtain a sufficient heat radiation effect with the above heat radiation structure, it is necessary to secure a large volume of the heat radiation space 3. For this reason, it is not possible to secure a large storage space for the storage cabinet 2, and the installation position is also increased, the area of the front opening through which articles are taken in and out is reduced, and it is difficult to put articles in and out. There was a problem that it became poor in practicality.

Further, since the above-mentioned heat radiation structure relies on natural convection, heat easily stays inside, and it cannot be said that a sufficient heat radiation effect can be always secured. In particular, the cooling performance of the refrigerator 1 deteriorates in summer. However, there is a problem that power consumption increases accordingly.

Accordingly, the present inventor has disclosed a heat dissipation structure which secures a heat dissipation path of a refrigerator incorporated in the system housing and improves the practicality of the storage cabinet.
No. 01-022422 and others. This configuration,
As shown in FIG. 8, a storage cabinet 12 is disposed above the refrigerator 1 with a small space 11 therebetween, and a blower 13 for discharging exhaust heat released from the refrigerator 1 to the outside is provided in the small space 1.
When the refrigerator 1 is provided in the refrigerator 1 incorporated in the system housing by the forced heat radiation by the heat radiation device 13, a sufficient heat radiation effect can be ensured.

[0006]

When the exhaust heat from the refrigerator 1 is exhausted to the outside by the air blower 13 as in the above configuration, the air blower 13 is not operated under constant conditions, but the operating state of the refrigerator 1 is changed. It is desirable to control the operation state of the blower 13 according to the temperature and the room temperature. That is, since the temperature environment of the refrigerator 1 changes depending on the season, time zone, and the like, and the operation load changes depending on the frequency of opening and closing the door and the amount of food stored, the operation of the blower 13 is controlled according to the temperature environment and the operation load. There is a need to. For example, in a state in which the door is frequently opened and closed in a state in which the summer environmental temperature is high, the refrigerator 1 is in a full operation state and the amount of exhaust heat increases. At that time, the heat radiation capacity of the blower 13 is increased, In a state in which the amount of heat exhausted from the refrigerator 1 is small as in the night of winter, since the heat radiation by the blower 13 is not required, the blower 13
It is required to perform control such as stopping power consumption to suppress power consumption.

[0007] An object of the present invention is to control the operation of a blower that discharges exhaust heat from a device to the outside when the device, such as a refrigerator, that involves heat exhausted by operation is incorporated in a system storage or the like. An object of the present invention is to provide a control method of a heat radiating device which is controlled according to a state and a temperature environment.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention forms a space between a device and a cabinet by arranging cabinets at predetermined intervals on the device with heat exhausted by operation. A method for controlling a heat radiator in which a fan motor that discharges exhaust heat of a device to the outside is disposed in a small space, and detects an operation state temperature corresponding to an operation state of the device, and detects the detected operation. The operation of the fan motor is controlled based on the state temperature.

According to the above control method, the operation of the fan motor is controlled based on the operating state temperature corresponding to the operating state of the equipment. Even when the heat is discharged to the outside and the heat is hardly dissipated by a cabinet or the like, the temperature rise of the equipment can be suppressed and the normal operation state can be maintained.

In the above control method, the operating state temperature is:
It can be detected as the exhaust heat temperature of the air exhausted from the device or the body temperature of the device. Further, since the cabinet disposed above the apparatus is affected by the exhaust heat, the operating state temperature can be detected as the temperature of the wall surface of the cabinet or the temperature of the cabinet.

The control of the fan motor based on the operating state temperature may employ a method of ON-OFF control and / or rotational speed control of the fan motor based on a threshold value of the operating state temperature. The ON-OFF control is an ON / OFF ratio control that increases the ON ratio per predetermined time when the operating state temperature is higher than a predetermined threshold, and increases the OFF ratio per predetermined time when the operating state temperature is lower than the predetermined threshold. On-off control can be adopted in which the ON state is set when the operating state temperature is higher than the highest set threshold, and the OFF state is set when the operating state temperature is lower than the lowest set threshold. Further, the rotation speed control can be controlled such that the rotation speed is increased when the operating state temperature is higher than a predetermined threshold value, and the rotation speed is decreased when the operating state temperature is lower than the predetermined threshold value.

Further, by setting a plurality of threshold values of the operating state temperature, more detailed heat radiation control becomes possible by controlling the fan motor corresponding to each threshold value.

[0013] The operating state temperature is an average of detection values detected a plurality of times within a predetermined period of time, thereby eliminating the influence of noise and instantaneous temperature changes.

The threshold value of the operating state temperature is set to a high or low temperature value with a predetermined hysteresis width, thereby eliminating an unstable state in which the operating state of the fan motor frequently changes due to a temperature change around the threshold value. be able to.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The embodiment described below is an example embodying the present invention, and does not limit the technical scope of the present invention.

In this embodiment, as shown in FIG. 1, a refrigerator, which is an example of a device accompanied by heat exhausted by operation, is incorporated in a system storage and heat is discharged onto the refrigerator 1 as shown in FIG. In the configuration in which the device 80 is provided, a control method for controlling the heat dissipation operation by the heat dissipation device 80 in accordance with the operation state of the refrigerator 1 is shown.

In FIG. 1, the top surface of the refrigerator 1 and the small space 11 are separated between side plate panels 10, 10 constructed so that a small side space 9 is formed between the both sides of the refrigerator 1. A storage cabinet (cabinet) 12 is installed,
The heat dissipation device 80 is arranged in the small space 11. As shown in FIG. 1B, the heat radiating device 80 is configured by connecting a ventilation duct 90 to the blower 13, is discharged from the back of the refrigerator 1, passes through the small back space 8, and rises into the small space 11. The exhaust heat is led to the blower 13 by the ventilation duct 90, and the exhaust heat is discharged to the outside by the blower 13. With the configuration of the heat radiating device 80, a heat radiating path is ensured even when the refrigerator 1 is incorporated in the system housing and the side and back surfaces of the refrigerator 1 are covered with the structure, and the refrigerator 1 is not overloaded. Normal operating conditions can be maintained.

FIG. 2 shows the structure of the heat radiating device 80. The heat radiating device 80 includes a blower 13 and a ventilation duct 90 as main components. The blower 13 includes a partition member 17 covering the front side of the small space 11 and a fan motor 2 described later.
It is configured by attaching a casing 18 containing 1 etc.,
The storage cabinet 12 is mounted on the bottom surface of the storage cabinet 12 by a fixture 82 attached to the bottom surface of the storage cabinet 12.
Further, the ventilation duct 90 is made of a highly heat-insulating material and a material that is easily cut, in this case, a resin cardboard is cut and bent to form a top plate 101, a bottom plate 102, and a support plate 103. The ducts are bonded to each other by the provided sticking margin, open on the back side, and provided with a connection port 104 on the front side into which the back plate 39 of the blower 13 is fitted.

As shown in the exploded view of FIG. 3, the blower 13 is composed mainly of a casing 18, a sirocco-type fan motor 21, an exhaust duct 23, a filter 24 and a cover plate 29. Casing 18
Is formed in a thin box shape with a top opening as a whole,
Thereafter, a large number of elongated air inlets 19 arranged in the width direction on the side surface.
Are formed, and the exhaust port 20 of the exhaust duct 23 is formed on the front side surface. The fan motor 21 is installed at a position facing the intake port 19 on the inner rear side of the casing 18. The exhaust duct 23 is connected to the outlet 2 of the fan motor 21.
2 is provided inside the casing 18 with a suction port communicating therewith. The filter 24 has a substantially rectangular plate-like body rear side portion 24a formed thin and has flexibility, and covers a plurality of ventilation holes 28A formed in the rear side portion 24a in the width direction. Filter net 27A is fixed as described above. An auxiliary filter net 27B is fixed to the front side of the filter net 27A so as to cover the auxiliary ventilation hole 28B. The cover plate 29 covers the upper opening of the casing 18 and is fixed to the casing 18 by screws.

As shown in FIG. 3, the interior of the casing 18 is divided into a ventilation chamber 31 and a substrate storage chamber 32 by a partition plate 30, and the fan motor 2 is provided inside the ventilation chamber 31.
1 and an exhaust duct 23, and an exhaust heat temperature sensor 110 for detecting the exhaust heat temperature of the refrigerator 1 is provided. Further, a circuit board (not shown) constituting a power supply circuit and a control circuit is disposed in the board storage chamber 32, and a power cord 97 connected to the power supply circuit is provided with a casing 1 as shown in FIG.
The plug 8 is pulled out to the outside, and a plug 98 is connected to the end thereof. This plug 98 is connected to the same power distribution branch circuit as the refrigerator 1 after all the components have been mounted, and is inserted into an outlet fixed to the side panel 10 in the small space 11 to blow the air. The power supply of the blower 13 is turned on / off by inserting / removing the insertion plug from / to the outlet so that the air conditioner 13 is operated.

As shown in FIG. 2, the partition member 17 has an exhaust port 20 which is open horizontally at the center and a filter 2 above the exhaust port.
4 is located at the end of the detachable operation unit 37.
After extracting the filter 24 from the front side from 7 and cleaning it,
The filter 24 can be mounted again. Also,
On the left side of the exhaust port 20, there are provided an indicator light for operation display, filter cleaning notification and the like, and an indoor temperature sensor 1 for detecting the indoor temperature.
Eleven externally exposed parts are provided. On the right side when viewed from the front, a vent 8 having slit-shaped openings arranged in a row.
3 is formed, and the inside of the small space 11 communicates with the outside through the vent 83, and when the blower 13 stops operating due to some failure, the exhaust path of the refrigerator 1 is secured until the failure is resolved. Like that.

The ventilation duct 90 is provided in the storage cabinet 1.
The blower 13 is screwed to a predetermined position on the bottom surface of the storage cabinet 2, and is attached to the bottom surface of the storage cabinet 12 by a pair of fixing fittings 82, 82 attached to the bottom surface of the storage cabinet 12. As shown in FIGS. 2 and 3, the blower 13 is mounted on mounting portions 85 and 8 formed on both sides of the casing 18.
5 are inserted into the fixing brackets 82 respectively. When the blower 13 is attached, as shown in FIG. 4, the back plate 39 having the air inlet 19 formed on the back side of the blower 13 fits into the connection opening 104 of the ventilation duct 90, and blows air to the ventilation duct 90. The device 13 is connected and a ventilation path for the exhaust heat air is formed. The mounted blower 13 is fixed in position by screwing a tapping screw into a fixing hole 82b formed on the upper surface of the partition member 17 through a screw hole 82a provided in the fixing bracket 82.

FIG. 4 shows that the blower 13 is connected to the fan motor 21.
It is shown as a cross-sectional view cut in the front-rear direction at the position of
When the fan motor 21 is driven to rotate, the exhaust heat air that has risen from the back of the refrigerator 1 into the small space 11 due to the intake air from the intake port 19 is guided to the ventilation duct 90 and
From the air blower 13, the dust that has entered through the filter net portion 27A and the auxiliary filter net portion 27B of the filter 24 is removed, is taken in by the fan motor 21, is discharged from the outlet 22, and is discharged from the exhaust duct 23. The air is exhausted to the outside through an exhaust port 20 provided in the partitioning body 17 through the passage.

The operation of the radiator 80 having the above configuration is controlled based on the exhaust heat temperature detected by the exhaust heat temperature sensor 110 and the indoor temperature detected by the indoor temperature sensor 111. Hereinafter, a control method of the heat dissipation device 80 will be described.

FIG. 5 shows the electrical configuration of the heat radiating device 80, and shows the rotational speed and ON / OFF of the fan motor 21.
Drive circuit 113 for controlling the temperature, exhaust heat temperature sensor 11
0 and a control circuit 114 that outputs a control signal to the motor drive circuit 113 in accordance with the detection output of the room temperature sensor 111;
The power supply circuit 112 is configured to convert AC power into drive power and control power for the fan motor 21. These connect the plug 98 connected to the power supply circuit 112 to the outlet 9 connected to the same distribution branch circuit as the refrigerator 1.
The control operation is started by plugging in and connecting to 9. This control operation will be described with reference to the flowchart shown in FIG. S1, S2,... Shown in FIG. 6 are step numbers indicating the processing procedure, and correspond to the numbers added in the text. Further, the specific control values shown below are values as examples, and are not limited thereto.

First, at the start of the operation in which the plug 98 is inserted into the outlet 99, the control circuit 114 instructs the motor drive circuit 113 of the initial low-speed operation mode (S1).
The motor drive circuit 113 rotates at a predetermined low speed (1300 rpm).
In step m), the fan motor 21 is driven to rotate. Control circuit 11
4 maintains the initial low-speed operation mode for one minute, during which time an appropriate operation mode is selected from the detection outputs of the exhaust heat temperature sensor 110 and the indoor temperature sensor 111.

The control circuit 114 detects the exhaust heat temperature and the room temperature at predetermined time intervals (30 ms), calculates respective one-minute average values, and executes a control operation based on the calculation results. Since the exhaust heat temperature and the indoor temperature are calculated while the initial low-speed operation mode is continued for one minute, after the operation in the initial low-speed operation mode has elapsed for one minute (S2), the exhaust heat temperature is 46 ° C. or more. By determining whether or not there is (S3),
If the exhaust heat temperature is 46 ° C. or higher, the motor drive circuit 113
Drives the fan motor 21 in the intermittent high-speed operation mode in response to a command from the control circuit 114 (S4). The setting of the intermittent high-speed operation mode is as follows.
pm, an intermittent operation operation of ON time 10 minutes / OFF time 5 minutes. On the other hand, if the exhaust heat temperature is equal to or lower than 46 ° C., the intermittent low-speed operation mode is instructed to the motor drive circuit 113 (S5). The setting of the intermittent low-speed operation mode is as follows: the rotation speed of the fan motor 21 is 1300 rpm, and the ON time is 5 minutes / OFF.
This is an intermittent operation operation for 15 minutes.

When it is determined that the exhaust heat temperature is 43 ° C. or less while the intermittent high-speed operation mode is being executed (S
6), the operation mode is changed to the intermittent low-speed operation mode.
When it is determined that the exhaust heat temperature is equal to or higher than 46 ° C. while the intermittent low-speed operation mode is being executed (S7), the operation mode is changed to the intermittent high-speed operation mode.

Since the exhaust heat temperature is affected by the indoor temperature, it is desirable to change the threshold value of the exhaust heat temperature according to the detected indoor temperature. For example, as shown in Table 1, 30 ° C.>
With T ≧ 20 ° C. as a standard state, the threshold value of the exhaust heat temperature in this case is set to 46 ° C. When the room temperature T is higher than 30 ° C., the refrigerator 1 is likely to be overloaded. 42 ° C threshold for exhaust heat temperature
And Conversely, when the room temperature T is 20 ° C. or less,
An offset is provided because the exhaust heat temperature varies according to the room temperature.

[0030]

[Table 1] In the above control method, when the exhaust heat temperature is equal to or higher than 46 ° C. in the determination in step S3, the operation mode in step S4 is set to the continuous high-speed operation mode, and the fan motor 21
Is continuously operated at a high speed of 1500 rpm, and step S
When the exhaust heat temperature is equal to or lower than 46 ° C. in the determination of 3, it is also possible to control to stop the fan motor 21 in step S5.

Further, it is also possible to set a plurality of threshold values for judging the exhaust heat temperature by the control circuit 114 and set the ON / OFF ratio of the intermittent operation in correspondence with each judgment threshold temperature, thereby performing more detailed control. In addition, when the detected exhaust heat temperature is lower than the lowest determination threshold temperature, control can be performed so that the operation of the fan motor 21 is stopped. Also,
When the detected exhaust heat temperature is higher than the highest determination threshold temperature, the fan motor 21 can be controlled to be continuously operated.

In the control method described above, the temperature of the exhaust heat air is detected by the exhaust heat temperature sensor 110 in order to detect the operating state temperature of the refrigerator 1, but even if the body temperature of the refrigerator 1 is detected. By setting the threshold temperature, the operating state of the refrigerator 1 can be detected more accurately, and the same control can be performed. Further, since the exhaust heat affects the storage cabinet 12, it is also possible to detect the wall surface temperature or the inside temperature of the storage cabinet 12 and control the operation of the fan motor 21 based on the detected value.

[0033]

As described above, according to the present invention, when a device such as a refrigerator, which involves exhaust heat, is incorporated in a system storage or the like, a control of a heat radiating device provided to exhaust the exhaust heat to the outside is provided. Is controlled according to the operating state of the equipment, and when the amount of exhaust heat is large, the amount of emission is increased, and when the amount of exhaust heat is small, the amount of emission is controlled. Can be placed.

[Brief description of the drawings]

FIG. 1A is a front view and FIG. 1B is a side view of a system housing to which a refrigerator and a heat radiating device according to an embodiment are applied.

FIG. 2 is an exploded perspective view showing a configuration of a heat dissipation device.

FIG. 3 is an exploded perspective view showing a configuration of a blower.

FIG. 4 is a cross-sectional view of the blower.

FIG. 5 is a block diagram showing an electrical configuration of the heat dissipation device.

FIG. 6 is a flowchart illustrating a procedure of a control method.

FIG. 7 is a side view showing a heat dissipation structure of a conventional refrigerator.

FIG. 8 is a side view showing the configuration of a conventional refrigerator heat dissipation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator (equipment) 12 Storage cabinet (cabinet) 13 Blower 21 Fan motor 110 Exhaust heat temperature sensor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Keisuke Kinoshita 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (12)

[Claims] 1. A cabinet is disposed at a predetermined interval on a device that generates heat due to operation, thereby discharging the waste heat of the device to the outside in a small space formed between the device and the cabinet. A method for controlling a heat radiator provided with a fan motor, comprising detecting an operating state temperature corresponding to an operating state of the device, and controlling the operation of the fan motor based on the detected operating state temperature. A method for controlling a heat radiating device. 2. The method according to claim 1, wherein the operating state temperature is an exhaust heat temperature of air exhausted from the device. 3. The method according to claim 1, wherein the operating state temperature is a body temperature of the device. 4. The method according to claim 1, wherein the operating state temperature is a temperature of a wall surface of the cabinet. 5. The method according to claim 1, wherein the operating state temperature is a temperature inside the cabinet. 6. The control method for a heat dissipation device according to claim 1, wherein ON / OFF control and / or rotation speed control of the fan motor is performed based on a threshold value of the operating state temperature. 7. The ON / OFF control increases the ON ratio per predetermined time when the operating state temperature is higher than a predetermined threshold, and increases the ON ratio per predetermined time when the operating state temperature is lower than the predetermined threshold. The method for controlling a heat radiating device according to claim 6, wherein the control is OFF ratio control. 8. The rotation speed control according to claim 6, wherein the rotation speed is controlled to increase when the operating state temperature is higher than a predetermined threshold value, and to decrease the rotation speed when the operating state temperature is lower than the predetermined threshold value. Control method of heat dissipation device. 9. The control method for a heat radiator according to claim 6, wherein a plurality of operating state temperature thresholds are set. 10. The heat radiation according to claim 6, wherein the ON-OFF control sets the ON state when the operating state temperature is higher than a set highest threshold, and sets the OFF state when the operating state temperature is lower than the set minimum threshold. How to control the device. 11. The control method for a heat radiator according to claim 1, wherein the operating state temperature is an average value of detection values detected a plurality of times within a predetermined time. 12. The operating state temperature threshold value is set to a high or low temperature value within a predetermined hysteresis width.
A method for controlling a heat dissipation device according to any one of the preceding claims.