JPS62119383A - Changer of direction of blast of cold air of freezing refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention is directed to the direction of blowing cold air into the cooling room of a refrigerator-freezer equipped with an electric blower, which requires uniform cold storage temperature distribution. Regarding the equipment to be changed below.

CB) Prior art In a conventional intercooling type or direct mixing type refrigerator-freezer equipped with an electric blower, the direction of air blowing from the electric blower to the cold air outlet between the cold air outlets is constant within a certain range in a certain direction. For this reason, in the case of intercooled cooling rooms that require uniform cooling temperature distribution, it has been difficult to equalize the temperature difference between the upper and lower sides.

(Q Problems that the invention aims to solve) Recently, users' needs for refrigerators have been toward larger size and multi-door models, as well as improvements in the quality, taste, and freshness of refrigerated foods, and rapid freezing when making frozen foods. The uniformity and precision of the required cold storage temperature are becoming increasingly strict, and further reductions in power consumption are required.

However, in the above-mentioned intercooling type or direct mixing type refrigerator-freezer equipped with an electric blower, the electric blower only circulates the air in a certain direction and within a certain range between the cold air outlets. For this reason, in the case of intercooling rooms that require uniform cold storage temperature distribution, it is not always sufficient to equalize the temperature difference between the top and bottom and maintain the uniformity and accuracy of the required cold storage temperature. Particularly in large-volume intercooling rooms, it is difficult to make the temperature distribution uniform above and below, and also to achieve the uniformity and precision of the required cold storage temperature during rapid freezing when making frozen foods. However, it was not always sufficient.

(D) Means for Solving the Problems In order to solve the above problems, the present invention provides an intercooling type or direct mixing type refrigerator-freezer equipped with an electric blower that requires a uniform cooling temperature distribution. In the cooling room, a wind direction changing vane is installed to be able to freely tilt, and a wind direction changing vane is installed to change the direction of air blowing into the intercooling room from the cold air outlet of the electric blower into upward, middle, and downward directions, and a variable wind direction motor that tilts the wind direction changing vane. and a wind direction angle detector installed in synchronization with the rotation of the variable wind direction motor to detect the wind direction angle.Also, the temperature is detected by upper and lower temperature detectors installed at the upper and lower parts of the intercooling room, respectively. a wind direction angle setting section that sets a predetermined wind direction angle according to the temperature, and a wind direction variable motor that controls operation according to the difference between the wind direction angle set by the wind direction angle setting section and the wind direction angle detected by the wind direction angle detector. The wind direction changing blade is tilted upward, middle, and downward, and when each setting and the detected wind direction angle match, the wind direction is changed to upward, middle, and downward to change the temperature distribution above and below the intercooling room. Make it even.

Meanwhile, at the same time, the upper and lower temperature sensors in the cooling room
One side is used as the reference temperature detector, and if there is a difference between the detected temperature and the set cold storage temperature, the electric compressor and electric blower are operated according to the temperature difference to control the temperature of the cold air to be blown. This system attempts to solve the problems of the prior art by making the temperature in the lower part of the cooling room the set cold storage temperature and its accuracy, and also reducing power consumption.

(Equivalent action) In general, in an intercooling room that requires a uniform cold storage temperature distribution, the temperature distribution is generally such that the upper part of the room has a higher temperature and the lower part has a lower temperature due to the principle of natural air convection. Therefore, in the past, the cold air outlet was installed above and the air was blown out in a fixed direction almost horizontally, and the cold air was circulated while falling from the top to the bottom of the room. It is not necessarily sufficient to obtain a uniform refrigerated temperature, and it largely depends on the size and shape of the stored refrigerated food.

Therefore, as a function of the present invention, in order to make the vertical temperature distribution uniform, the cold air in the same room is stirred by changing the blowing direction of the cold air outlet by the electric blower to upper, middle, and lower by tilting the wind direction changing blade. By circulating it, the temperature distribution in the upper and lower parts of the same room is made uniform, and at the same time, it is intended to achieve the set cold storage temperature and accuracy. This method is as above,
Since the air is forced in the middle and downward direction, the unevenness of the temperature distribution in the upper and lower directions is not greatly influenced by the size and shape of the stored cold food compared to the conventional method.

Furthermore, because of the uniform temperature distribution, unnecessary power consumption can be saved as in the conventional case, leading to a reduction in power consumption.

(F') Example Embodiments of the present invention will be described based on FIGS. 1 to 3.

The refrigerator-freezer shown in FIG. 1 is a direct-mixing three-cooling-chamber, three-door refrigerator-freezer equipped with a cold air ventilation change device, and has one freezer compartment and one refrigerator compartment, respectively, through a heat insulating wall. Semi-freezing room (or ice room) 2.
and a refrigerator compartment 3. The freezing room 1 is a direct cooling room formed by a box-shaped freezer room evaporator 4, and the semi-freezing room (or ice room) 2 and the refrigerator room 3 are intercooling rooms, and the innermost part of each is a cooling room. Evaporators 5, 5' are installed, and partition plates 6, 6' are set up in front of the evaporators 5, 5'.
and cooling chambers 2 and 3.

A temperature sensor 7 is provided in the freezer compartment 1 of the direct cooling cooling compartment,
On the other hand, temperature sensors 7a and 7b are installed above and below the intercooling chambers 2 and 3 to detect the upper and lower temperatures in the respective cooling chambers.
, and 7'a.

7'l is provided to detect the temperature at the top and bottom of the cooling room. In this case, temperature sensors 7a and 7'a are used as reference temperature detectors for the respective cooling chambers.

Note that 8 is an ambient temperature detection sensor that detects the ambient temperature of the refrigerator-freezer.

Above each of the evaporators 5 and 5' for the cooling room, an electric blower 9.9' whose respective drive motor is buried in the heat insulating wall is connected to the cold air outlet 10°10' of the partition plate 6.6'. The semi-freezing room (or ice room) 2 and the refrigerator room 3 are equipped with electric blowers 9.9' to transfer the cold air from each evaporator 5.5'.
Air is blown into each cooling room and cooled.

FIG. 2 is an example of a detailed diagram of a device for changing the direction of cold air blowing in the semi-freezing room (or ice room) 2 of the intercooling room. As shown in the figure, wind direction changing blades 12 are provided on opposite side walls of this cold air outlet 10.
is mounted so as to be freely tiltable via a tilting shaft 13, and a variable wind direction motor 14 for tilting the wind direction changing blade 12 is connected to one end of the tilting shaft 13 and embedded in the heat insulating wall. A wind direction angle detector 15 (for example, a potentiometer, A rotary encoder, cam limit switch, etc.) is installed embedded in the heat insulating wall. Also, 11 is an electric blower 9
It serves as an air guide for cold air blown from the air guide, and at the same time serves as a stopper at the tilting limit when the wind direction changing blade 12 for changing the wind direction upward or downward is tilted. In addition, the wind direction changing blade 12. The material of the tilting shaft 13 is preferably a material that does not easily cause low-temperature brittleness or strength deterioration (for example, aluminum, FRP, plastic, etc.).

FIG. 3 is an example of a block diagram of a control circuit for the semi-freezing room (or ice room) 2. As shown in FIG. In the figure, the dotted line diagram is a conventional control system for a refrigerator-freezer, and the solid line diagram is a control system for a cold air blowing direction changing device. same as below. 16 are the upper and lower temperature sensors 7a and 7b of the semi-freezing room (or ice room) 2, respectively.
This is a wind direction angle setting section for comparing the temperatures detected at 17 and stopping the rotation of the variable wind direction motor 14 at an angle that requires colder air. 17 is a comparator and a wind direction angle setting section 16
and the voltage value of the wind direction angle detector 15, and if there is a difference in voltage value, in order to eliminate the difference, the operation control section of the variable wind direction motor 14 (rotation speed control statement i, [N/OFF control ) 18 and the comparison selection control section 22,
The wind direction changing blade 12 is tilted upward, middle, or downward, and at the same time, the comparison selection control section 22 is used to stir and circulate the electric compressor and the electric blower while changing the rotation speed control or ON/0 blowing direction. The temperature distribution between the upper and lower parts of the freezing chamber (or ice room) 2 is made uniform.Then, the difference in voltage value is eliminated, and the rotation of the variable wind direction motor 14, electric compressor 23, and electric blower 9 is stopped.

The above Figures 2 and 3 have been explained using the case of the semi-freezing room (or ice room) 2 as an example, but the same applies to the case of the refrigerating room 3, which is a cold room. The only difference is that the same number is followed by a darashi (勺), so the explanation will be omitted.

Next, in FIGS. 1 and 3, 19 and 19' are semi-freezing chambers (or ice chambers) 2. A semi-freezing room (or ice room) temperature-voltage converter section, which converts the temperature difference between each temperature detected by the reference temperature detectors 7a and 7'a of the refrigerator compartment 3 and each set temperature into a voltage, and a refrigerator compartment. 20 and 21 are temperature-voltage converters, respectively, and temperature sensors 7 in the freezer compartment 1.
and a freezer compartment temperature/voltage converter and an ambient temperature/voltage converter, respectively, which convert the temperature difference between each temperature detected by the ambient temperature detection sensor 8 and each set temperature into voltage,
The comparison selection control section 22 includes the freezer compartment temperature voltage conversion section 20. Semi-freezing room (or ice room) temperature-voltage converter 19. The voltages obtained by the refrigerator compartment temperature/voltage converter 19' are compared, and the one with the larger voltage, that is, the one with the larger temperature difference with respect to the set temperature, is selected preferentially, and the next operation control of the electric compressor 23 is performed. Part (rotation speed control or ON/OFF control) 24. and electric blower for semi-freezer room (or ice room)9. Each operation control section (rotation speed control, or ON/OFF
control) 25. Send a control signal to 25' and control the electric compressor 2.
3. and electric blower for semi-freezer room (or ice room)9. Any or all of the refrigerator compartment electric blowers 9' are operated (rotation speed control or ON/OFF control). Note that if the voltage obtained by the ambient temperature voltage converter 21 is lower than the set voltage, the operation control units 24, 25 of the electric compressor and the electric blower
A control signal is sent to 25' to make the rotational speeds of the electric compressor 23 and the electric blowers 9, 9' constant.

In this way, the semi-freezing room (or ice room) of the cooling room for each period 2. The temperature distribution in the refrigerator compartment 3 is made uniform vertically, and at the same time, there are 12 freezer compartments in the direct cooling compartment and a quasi-freezer compartment (or ice room) in the cooling compartment.
The cold storage temperature of the refrigerator compartment 3 reaches the set temperature. Note that 26 is a condenser, and 27 is a heat radiation fan.

In addition, in this embodiment, a direct mixing type three-cooling room three-door type refrigerator-freezer is described, but the present invention can be applied to any other inter-cooling type or direct mixing type multiple-cooling-chamber multiple-door type refrigerator-freezer. In accordance with.

(Q Effect of the Invention As explained above, the effect of the cold air blowing direction changing device for a refrigerator-freezer of the present invention is that it can be used for cooling an intermediate-cooling type or direct-mixing type refrigerator-freezer equipped with an electric blower that requires uniform cooling temperature. In the cooling room, this device changes the blowing direction of the cold air to upward, middle, and downward directions and circulates the cool air with stirring, thereby reducing the temperature difference between the upper and lower parts of the cooling room and making the temperature distribution uniform.
At the same time, the uniform temperature can be made to match the required cooling temperature and accuracy, and in particular, it is effective to equalize the temperature difference between the upper and lower parts of a large-volume intercooling room to obtain the required cooling temperature uniformity and accuracy. This is remarkable, and also has the effect of achieving uniformity and accuracy of the required cold storage temperature during rapid freezing when making frozen foods.

Therefore, it can fully meet the needs of the trend toward larger refrigerators and refrigerators with more doors, and at the same time, it has a good effect on the quality, taste, and freshness of refrigerated foods, and it also has the effect of improving home freezing performance. It also has the effect of reducing power consumption.

[Brief explanation of drawings]

Figure 1 shows a direct mixing type 3-cooling room 3-door refrigerator-freezer equipped with a cold air ventilation change device. Figure 2 is a detailed view of the cold air ventilation change device for a semi-freezing room (or ice room) in an intercooling room. Example FIG. 3 is an example of a block diagram of a control circuit for a freezing room (or ice room). 1: Freezing room 2: Semi-freezing room (or ice room) 3: Refrigerating room 4: Evaporator for freezing room 5, 5': Evaporator for semi-freezing room (or ice room) and refrigerator room 6, 6': Semi-freezing room Freezer room (or ice room) and refrigerator compartment partition plate 7: Freezer room temperature sensor 7rh, 7b) Semi-freezer room (or ice room) upper and lower temperature sensor 7ffiL, 7'l): Refrigerator room upper and lower temperature sensor 8 : Ambient temperature detection sensor 9.9' : Electric blower for semi-freezing room (or ice room) and refrigerator room 10.10' : Cold air outlet for semi-freezing room (or ice room) and refrigerator room ti, it' : Semi Air guide 12.12' for freezing room (or ice room) and refrigerator room: Air guide for semi-freezing room (or ice room) and refrigerator room 13.13': For semi-freezing room (or ice room) and refrigerator room Tilt axis of wind direction changing blade 14.14': Variable wind direction motor for semi-freezing room (or ice room) and refrigerator room 15.15': Wind direction angle detector for semi-freezing room (or ice room) and refrigerator room 16. 16': Wind direction and angle setting unit for semi-freezing room (or ice room) and refrigerator room 17.17': Comparator for semi-freezing room (or ice room) and refrigerator room 18': Semi-freezing room (or ice room) ) and the driving side control section 19, 19' of the variable wind direction motor for the refrigerator compartment: Semi-freezing room (or ice room) and refrigerator room temperature/voltage converter 20: Freezer room temperature/voltage converter 21: Ambient temperature/voltage converter 22: Ratio soft selection control section 23: Operation control section 25.25' for electric compressor 24''
: Operation control unit for electric blower for semi-freezing room (or ice room) and refrigerator room 26: Condenser 27: Heat dissipation fan

Claims (1)

[Claims] 1. In an intercooling or direct mixing type refrigerator-freezer equipped with an electric blower, in an intercooling room that requires uniform cold storage temperature distribution, the intercooling of the cold air outlet by the electric blower is performed. A wind direction changing blade that changes the direction of air blowing into the cooling room from up, middle, and down is installed so as to be tiltable, and a variable wind direction motor that tilts this air direction changing blade is installed to synchronize with the rotation of this variable wind direction motor. 1. A cold air blowing direction changing device for a refrigerator-freezer, characterized in that it is configured to include a wind direction angle detecting means for detecting an angle. 2. Upper and lower temperature detection means installed at the upper and lower parts of the intercooling room, respectively, a wind direction angle setting means for setting a predetermined wind direction angle according to the temperature of the upper and lower temperature detection means, and this wind direction angle setting. Claim 1, characterized in that the variable wind direction motor is configured to stop rotating when the wind direction angle set by the wind direction angle and the wind direction angle detected by the wind direction angle detection means match. The cold air blow direction changing device for the refrigerator-freezer described above.