JPH0473575A - Refrigerator - Google Patents

Abstract

PURPOSE:To keep a freezing room temperature at a given temperature by controlling drive and stop of a compressor in a freezing cycle based on the freezing room temperature, turning a fan during operation of the compressor to circulate cold air in a refrigerator, and also turning the fan during stop of the compressor. CONSTITUTION:Because a fan control switch 50 is not opened unless an integrating timer 56 has not passed a given time, a fan motor 34 is kept on being energized and a fan 36 is turned on. Consequently, cold air in a freezing room 25 and from a condenser 33 which is set lower than a set temperature of a refrigerating room 26, chilled room 27, and vegetable room 28 is supplied to each of these rooms 26, 27, and 28, with resulting acceleration of refrigeration to these. When the temperature of the freezing room 25 is raised by supplying cold air in it 25 to each of these rooms 26, 27, and 28, a freezing room temperature detecting switch 47 is closed to cause a compressor 49 to be operated so that the temperature of the freezing room 25 is kept at a given temperature again.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention provides a cooling chamber in addition to the freezing chamber, and a fan for circulating cold air inside the refrigerator, so that the temperature of the freezing chamber can be adjusted. The present invention relates to a refrigerator in which driving and stopping of a compressor of a refrigeration cycle is controlled based on the above, and the fan is operated while the compressor is in operation to circulate cold air inside the refrigerator.

(Prior Art) An example of a conventional refrigerator is shown in FIGS. 6 and 7. In FIG. 6 showing the overall structure, the air cooled by the cooler 1 is supplied to the freezer compartment 3 and the refrigerator compartment 4 by the fan 2, and after cooling each compartment 3.4, it is returned to the cooler 1 section. It will be done. The freezer compartment 3 is provided with a temperature check switch 5 (see Figure 7) that turns off when the temperature of the freezer compartment 3 falls below the set temperature. Then, the temperature detection switch 5 is turned off to stop further cooling operation to the freezer compartment 3, and the compressor 6 of the refrigeration cycle and the fan motor 2a of the fan 2 are cut off, and their operation is stopped. Ru. In this case, the defrost timer 7 that adds up the operating time of the compressor 6 is also cut off.

Furthermore, the temperature of the refrigerator compartment 4 is maintained at a set temperature by opening and closing a temperature-sensitive damper 8.

The fan 2 is operated in a normal state, but the door 9°]0
It is designed to be stopped based on the opening of the defrost timer 7 and the operation of the defrost timer 7. In other words, when doors 9° and 10 are opened, the freezer compartment door switch] 1° refrigerator compartment door switch]
2 are opened, and when the cumulative operating time of the defrosting timer 7 or the defrosting start time is reached, the contacts C and a of the defrosting switch 13 are opened.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional configuration, the set temperature of the cooling room other than the freezing compartment 3, in this case the refrigerator compartment 4, is set low, and the set temperature of the freezing compartment 3 is set relatively high. The following problems occur when That is, in a situation where the temperature of the refrigerator compartment 4 does not decrease, the temperature of the freezer compartment 3 may reach the set temperature, and the compressor 6 and the fan 2 may also stop. In this case, the supply of cold air to the refrigerator compartment 4 is stopped, and cooling to the refrigerator compartment 4 is only possible after the temperature of the freezer compartment 3 rises above the setting and the compressor 6 and fan 2 start operating. As a result, the cooling rate for the refrigerator compartment 4 may become slow. As a countermeasure, the set temperature of the freezing compartment 3 may be lowered to extend the operating time of the compressor, but this results in the freezing compartment 3 becoming overcooled.

The present invention has been made in view of the above circumstances, and an object of the present invention is to control the driving and stopping of a compressor in a refrigeration cycle based on the temperature of a refrigeration chamber, and to provide cooling to the refrigeration chamber even if the compressor is stopped. To provide a refrigeration section which can accelerate cooling and thereby increase the cooling rate of a cooling compartment without overcooling the freezing compartment.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a cooling chamber in addition to the freezing chamber, and a fan for circulating cold air inside the refrigerator, and controls the refrigeration cycle based on the temperature of the freezing chamber. The drive and stop of the compressor is controlled, and the fan is operated while the compressor is in operation to circulate cold air in the refrigerator, and an operation control means is provided to operate the fan even when the compressor is stopped. However, the present invention is characterized in that (claimed invention).

Instead of the operation means, an operation control means may be provided that operates the fan even when the compressor is stopped when the temperature of the cooling chamber is higher than a set temperature (invention of claim 2).

(Function) According to the means of the invention of claim 1, since the fan is operated even when the compressor is stopped, the cold air inside the refrigerator is circulated, and the cold air in the freezer compartment whose temperature is lower than the cold air temperature in the cooling compartment and the cooler air are cooled. Cold air is supplied into the cooling chamber. As a result, cooling of this cooling chamber is promoted. Furthermore, even if the cold air from the freezer compartment is supplied to the cooling compartment side, the compressor is operated by the temperature control of the freezer compartment, so the freezer compartment will be maintained at the predetermined temperature again, causing problems with the temperature control of the freezing compartment. There isn't.

Is there any problem in operating the fan uniformly when the compressor stops?If the cooling room is supplied with cold air when the temperature is above the set temperature even when the compressor stops, it would be possible to cool the cooling room. Cooling of the room can be said to be sufficient.

However, according to the means of the invention of claim 2, since there is provided an operation control means for operating the fan even when the compressor is stopped when the temperature of the cooling chamber is higher than the set temperature, the cooling chamber is cooled. Not only can a sufficient amount of cool air be supplied, but fan operation can also be kept to the minimum necessary.

(Example) Hereinafter, a first example of the present invention will be described with reference to FIGS. 1 to 3.

In FIG. 3 showing the overall structure of the refrigerator, the refrigerator main body 2
Inside the refrigerator, a freezing compartment 25, a refrigerating compartment 26 as a cooling compartment, a chilled compartment 27, and a vegetable compartment 28 are formed in order from the top by partitions 22, 23 and 24, respectively. These rooms 25°26, 27, and 28 are opened and closed by doors 29, 30, and 31°32, respectively.

A cooler chamber 22a is formed in the upper partition portion 22, and a cooler 33 is accommodated therein. This cooler chamber 22
A fan 36 consisting of a fan motor 34 and blades 35 is provided at the rear part of a. The fan 36 supplies cold air inside the refrigerator to the respective chambers 25, 26, 27, and 28 through a duct 37 formed on the back wall of the refrigerator main body 21. The cold air supplied to the freezer compartment 25 and the refrigerator compartment 26 is then transferred to a cold air return port 22b, respectively.
, 22c, and the cold air supplied to the chilled compartment 27 and the vegetable compartment 28 is returned to the cooler compartment 22a through a circulation duct (not shown). In addition, each cold air inlet 26a, 27a, 28a of the refrigerator compartment 26, chilled compartment 27, and vegetable compartment 28 has a second
Dampers 38, 39, 4.0 as shown in the figure are provided.

These dampers 38, 39, 40 all have the same gas-filled bellows configuration, and as the gas pressure inside the heat sensitive part 41 changes in accordance with the room temperature, the bellows 42 expands and contracts, thereby causing the damper plate 43 to expand and contract. are each cold air inlet 26a,
27a and 28a are opened and closed. In addition, each damper 38, 39
,401. : The closing operation temperature of the damper plate 43 can be set individually.

Next, in FIG. 1 showing the electric circuit, a commercial AC power source 44
A power line Lb, a contact point Ca1 of the refrigerator compartment door switch 45, an interior light 46, and a power line La are connected in this order between both terminals 44a and 44b. And power line L
A freezing room temperature detection switch 47, a contact C-a of a defrosting switch 48, and a compressor 49 are connected in series between a and Lb, and a fan control switch 50° is connected to the above-mentioned fan motor 34, for the freezing room. Contacts c and b of the door switch 51, the chilled room door switch 52, and the refrigerator door switch 45 are connected in series.

Furthermore, when the fixed contact of the defrosting switch 48 is connected to the power supply line L
A bimetal switch 53 and a fuse 54 are connected between
and a defrosting heater 55 are connected in series, and an integration timer 56 is connected in parallel with contacts c-b of the defrosting switch 48 and the bimetal 53.

Here, in the refrigerator compartment door switch 45, when the door 26 is opened, the contacts c and a are closed, and when the door 26 is closed, the contacts c and b are closed. The refrigerator compartment door switch 51 and the chilled compartment door 52 open and close in accordance with the opening and closing of the six doors 25 and 27, respectively.

Further, the integration timer 56 operates when the electricity is turned on, and when the electricity application cumulative time reaches a predetermined time, the defrosting switch 48
The fan control switch 50 is opened at the same time as the contacts c and b are closed. The fan control switch 50, which is present in the main circuit of the fan motor 34, and the integration timer 56, which is present in the main circuit of the freezer compartment temperature detection switch 47, constitute a fan operation control means 57.

In such a configuration, the six doors 25, 26, and 27 are closed, and the cumulative time of the cumulative timer 56 does not reach the predetermined time.
Moreover, considering a state in which the temperature of the freezer compartment 25 is higher than the set temperature, each switch in FIG. 1 is in the state shown in the figure. Therefore, the compressor 49 is operated, and the fan motor 34 and thus the fan 36 are also operated. This results in
Air cooled by cooler 33 or fan 36
The circulation is repeated such that the air is supplied to each of the chambers 25, 26, 27, and 28, and then returned to the cooler chamber 22H. During such operation, the refrigerator compartment 26 and the chilled compartment 2
7. Each of the vegetable compartments 28 has a damper damper 38,
The temperature is controlled to be the set temperature by the opening/closing operation of 39.40.

Now, when the temperature in the freezer compartment 25 falls below the set temperature and the freezer compartment temperature detection switch 47 opens, the compressor 4
9 and the integration timer 56 are cut off, and the compressor 49
The operation of the integration timer 56 is stopped, and the integration operation of the integration timer 56 is also stopped. In this case, the fan control switch 50 is not opened unless the integration timer 56 reaches the predetermined time, so the fan motor 34 remains energized and the fan 36 continues to operate. Therefore, the cold air inside the refrigerator continues to circulate, and as a result, the cold air in the refrigerator compartment 26 and the chilled compartment 2
7. The cold air in the freezer compartment 25 and the cold air in the cooler 33, which are set lower than the set temperature of each compartment in the vegetable compartment 28, are supplied into each of these compartments 26, 27, and 28. As a result, cooling of each of these chambers 26, 27, and 28 is promoted. In addition,
The temperature of the freezer compartment 25 increases as the cold air from the freezer compartment 25 is supplied to the respective compartments 26, 27, and 28, but in this case,
Freezer room temperature detection switch 47 closes and compressor 4
9 is operated, the freezer compartment 25 is again maintained at the predetermined temperature, and there is no problem in controlling the temperature of the freezer compartment 25.

The operation of the fan 36 is stopped when any of the six doors 29, 30.degree. 31 is opened, and when the integration timer 56 has integrated a predetermined time.

4 and 5 show a second embodiment of the present invention, and in FIG. 4, the fan operation control means 58 is different. That is, in addition to the fan control switch 50 and the integration timer 56, the operation control means 58 includes a refrigerator compartment temperature detection switch 59, a tilt compartment temperature detection switch 60, and a vegetable compartment temperature detection switch 61. Each switch 59.60.6i is connected in parallel between the power line La and the fan control switch 50, respectively.

These switches 59, 60, 61 are incorporated in the dampers 38, 39, 40 of each chamber, as shown in FIG. When the temperature is above the set temperature, the damper plate 43 is closed (opened), and when the temperature is below the set temperature, it is opened (the damper plate 43 is closed). In addition, the switch 62 that interlocks with the freezer compartment temperature detection switch 47 is also connected to each switch 59.
．． 60.61 are connected in parallel.

Thus, in this second embodiment, each chamber 26.2
Not only can sufficient cold air be supplied for 7.28, but also the operation of the fan 37 can be suppressed to the necessary minimum. In other words, when the temperature of each chamber 26, 27, 28 falls below the set temperature, there is no problem in stopping the supply of cold air;
7.28 is equal to or higher than the set temperature, supply of cold air may be executed. When the temperature of each chamber 26, 27, 28 is higher than the set temperature and the compressor 49 is stopped, it is preferable to continue supplying cold air.

In this respect, according to this embodiment, the refrigerator compartment 26, the chilled compartment 27,
Since the operation controller stage 58 is provided to operate the fan 36 even when the compressor 49 is stopped when the temperature of the vegetable compartment 28 is higher than the set temperature, each compartment 2
6, 27, and 28, not only can a sufficient amount of cold air be supplied, but also the fan operation can be reduced to the minimum necessary compared to the case where the fan 36 is temporarily operated when the compressor 49 is stopped. This has the effect that it can be suppressed to In addition, since the switch 62 that interlocks with the freezer compartment temperature detection switch 47 is connected in parallel with each switch 59, 60, 61, even if the temperature of each compartment other than the freezer compartment 25 is below the set temperature, even if the temperature of the freezer compartment 25 is above the set temperature. If so, the fan 36 can be operated.

[Effects of the Invention] As is clear from the above description, the present invention can provide the following effects.

According to the refrigerator described in Claims, cooling of the cooling chamber can be promoted even if the compressor is stopped, and thereby the cooling rate of the cooling chamber can be increased even if the freezing chamber is not supercooled.

According to the refrigerator according to the second aspect, even if the compressor is stopped, it is possible to supply necessary and sufficient cold air to the cooling chamber, thereby increasing the cooling rate for the cooling chamber without overcooling the freezing chamber. Moreover, it has the excellent effect of reducing fan operation to the necessary minimum.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, in which Figure 1 is an electric circuit diagram, Figure 2 is a vertical side view showing the damper, and Figure 3 is a vertical side view of the entire refrigerator. , 4 and 5 show a second embodiment of the present invention, in which FIG. 4 is an electric circuit diagram and FIG. 5 is a longitudinal sectional side view of the damper. 6 and 7 show a conventional example, with FIG. 6 being a vertical side view of the entire refrigerator, and FIG. 7 being an electric circuit diagram. In the drawing, 25 is a freezer compartment, 26 is a refrigerator compartment (cooling compartment), 27 is a chilled compartment (cooling compartment), 28 is a vegetable compartment (cooling compartment), 33 is a cooler, 34 is a fan motor, 35 is a blade, and 36 is a fan. , 45 is a refrigerator compartment door switch, 47 is a freezer compartment temperature detection switch, 48 is a defrosting switch, 49 is a compressor,
50 is a fan control switch, 55 is a defrosting heater, 56 is an integration timer, 57.58 is a fan operation control means, 59 is a refrigerator room temperature detection switch, 60 is a chilled room temperature detection switch, and 61 is a vegetable compartment temperature detection switch. show. Agent Patent Attorney Tsuyoshi Sato

Claims (1)

[Scope of Claims] 1. A cooling chamber is provided in addition to the freezing chamber, and a fan is provided for circulating cold air in the refrigerator, and the drive and stop of the compressor of the refrigeration cycle is controlled based on the temperature of the freezing chamber; What is claimed is: 1. A refrigerator that operates the fan to circulate cold air in the refrigerator while the compressor is in operation, further comprising an operation control means for operating the fan even when the compressor is stopped. 2. A cooling room is provided in addition to the freezing room, and a fan is provided for circulating cold air inside the refrigerator, and the drive/stop of the compressor of the refrigeration cycle is controlled based on the temperature of the freezing room, and the The fan is operated to circulate cold air in the refrigerator, characterized in that an operation control means is provided for operating the fan even when the compressor is stopped when the temperature of the cooling chamber is higher than a set temperature. Refrigerator.