JPH0282078A - Freezer 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] [Field of Industrial Application] The present invention relates to a refrigerator-freezer having a freezer compartment, a refrigerator compartment, and a constant temperature chamber, and particularly relates to a refrigerator that maintains the effective internal volume of the constant temperature chamber to the maximum. The present invention relates to a refrigerator-freezer suitable for.

[Conventional technology]

Conventional household refrigerators have a freezing temperature of about -18 degrees Celsius, which is suitable for storing frozen foods, and a freezing temperature of about 4 degrees Celsius, which is suitable for storing general foods without freezing. '1 Room, especially taste, flavor, and freshness are affected by temperature and humidity 4
There is a constant temperature room that maintains the freezing temperature range of 2 to -3 degrees Celsius, just before freezing, for long-term preservation of easily accepted fish and meat, and a temperature controlled room for vegetables and fruits at a temperature of 0 to 5 degrees Celsius. There is also a vegetable compartment for storing vegetables.

Here, is the constant temperature room further in a semi-frozen state like meat and fish? : A chilled room at a suitable temperature (approximately -1℃) and an unfrozen state? : It may be divided into a refrigerated chilled room which is kept at an appropriate temperature (approximately 1°C).

Conventional refrigerator-freezers are equipped with independent temperature control devices, as described above (as storage temperature zones have become subdivided and multi-chambered rooms have been created, and the temperature to be maintained has become more precise). Now each room has one.

By the way, the temperature control device mainly consists of a damper that opens and closes at the opening of the air passage and a drive device that drives the damper, and is housed in one case and is installed in the middle of the cold air blowing passage that supplies cold air to each room. For example, Utility Model Application No. 61-203278, Utility Model Application No. 6, installed at the end of the air passage floor.
2-45666 etc.

[Problem to be solved by the invention]

In this type of refrigerator-freezer, once the size of the storage chamber housing is determined, the size of each chamber is distributed and the size of the temperature controlled room is determined. There was a problem in that the effective internal volume of the constant temperature room was reduced because the space was occupied exclusively.

In addition, since the driving elements in the temperature control device consume electricity and also act as a heating element, when the number increases, the driving element becomes a heating element that cannot be ignored, and there is a problem that double voltage power is consumed to cool it. There is.

And the conventional temperature control device is a temperature sensor.

The drive body, damper, air path, and case form a pair.

There is a problem in that the manufacturing cost increases each time the device is installed in multiple constant temperature rooms.

An object of the present invention is to eliminate the above-mentioned problems of the prior art and provide a refrigerator-freezer equipped with a multi-damper device that independently controls opening and closing of a plurality of dampers using one driving body. It is.

[Means to solve the problem]

The above object has a freezing room, a cold storage room, and at least one constant temperature room attached to the cold storage room, and an opening in each cold air duct for guiding cold air for cooling to the cold storage room and the constant temperature room. By adjusting the cold air flow rate of the cold air blowing path by changing the opening degree of the damper provided in the cold storage room and constant temperature room according to the set temperature of each temperature sensor, In a refrigerator-freezer equipped with a temperature control device capable of controlling the temperature of a greenhouse, a plurality of openings and a damper are attached to a cold air inlet of a cold air duct for guiding cold air for cooling to the refrigerator compartment and constant temperature room.・Multi-damper device configured so that a branch air passage provided independently downstream of the damper and one drive device consisting of a motor, speed reducer, multiple cams, and connecting rods are housed in one case. This is achieved by extending from the rear of the partition that separates the freezing and refrigerating compartments to the rear of the refrigerating compartment.

[Effect]

Cool air for cooling is introduced from the cold air inlet of the cold air duct through a single multi-damper device, and is controlled by temperature sensors and a single control circuit installed in the refrigerator room and constant temperature room, depending on the set temperature of the multi-damper. The opening/closing position of the damper of the damper device is selected and the damper is opened/closed, and the flow rate of cold air in the branch air passage to each room is independently controlled, and the temperature of the refrigerated room and constant temperature room is maintained at a predetermined temperature with high precision. It does not reduce the effective internal volume of the greenhouse (only one small motor is used, so the power consumption is extremely small, and the production cost can be reduced because only one set is required).

〔Example〕

The present invention will be explained below by way of examples. FIG. 1 is a vertical cross-sectional view of a refrigerator-freezer according to an embodiment of the present invention (also a cross-sectional view taken along the line B-B in FIG. 2), and FIG.
3 is an enlarged sectional view showing details of the multi-damper device in FIG. 1, FIG. 4 is a sectional view taken along the line C-C in FIG. 3, and FIG. 5 corresponds to the cam phase. FIG. 6 is a diagram showing the opening/closing states of the dampers for the cold storage room and the constant temperature room.

First, a refrigerator-freezer having a multi-damper device that controls the temperature of two rooms, a refrigerator compartment and a constant temperature room, will be described.

In the figure, 1 is a freezer compartment 2 for storing frozen foods.
Refrigerator room for storing general foods 3. A refrigerator-freezer having a constant temperature chamber 4 for maintaining and preserving fish, meat, etc. at a temperature just before freezing, and a vegetable compartment 5 for preserving vegetables and fruits, 6 is the main body of this refrigerator-freezer l, and its interior. Cooler 9. The box body 7 in which the cold air circulation device 8 etc. is incorporated is
A partition 8 divides the internal volume of the box 6 into a freezer compartment 2 and a refrigerator compartment 3; 8 is a cold air circulation device for circulating the air inside the refrigerator-freezer 1; and 9 is a partition for circulating the air inside the refrigerator-freezer 1. A cooler for cooling, 10 is a blowout for blowing out the cold air for cooling (hereinafter referred to as cold air) cooled by this cooler 9 to the freezer compartment 2. The cooler 9
12 is a freezer compartment air passage for returning the air to the refrigerator compartment 3. A cold air duct serves as a duct for cooling air to cool the constant temperature room and vegetable compartment.

12α is a cold air introduction port that guides cold air to the refrigerator compartment 3,
It is opened and closed by a damper 15 for the refrigerator compartment. 12b is a cold air introduction port that guides cold air to the downstream branch air passage 26 of the constant temperature chamber 4, and is opened and closed by the constant chamber damper 16. A cold room return air path 14 for returning the cold air to the cooler 9 introduces cold air through the cold room damper 15, and a constant temperature room air outlet 0.15 for blowing it out to the cold room 3 is as follows: A damper arm is provided in the cold air inlet 12α and is generated in response to the driving force transmitted from the motor 19 through the decelerator 20, shaft 21, refrigerator compartment cam 18α, and refrigerator compartment connecting rod 23α. A refrigerator compartment damper 16 that opens and closes through a displacement of 15α is provided at the cold air inlet 12A, and connects the cold air inlet 12A from the motor 19 to the decelerator 20 and the shaft 21.
．． The constant temperature chamber damper 17α, which opens and closes through the displacement of the damper arm 16α generated in response to the driving force transmitted through the constant temperature chamber cam 18b and the constant temperature chamber connecting rod 23b, is introduced through the constant temperature chamber damper. A constant temperature room air outlet for blowing out cold air to the downstream branch air passage 26 that leads to the constant temperature room 4.

17h is a vegetable compartment blower 0.0 for guiding the cold air introduced through the constant temperature room damper to the vegetable compartment 5 (and blowing it out to the fresh air path 36).
18α is a cam for a refrigerator, 18h is a cam for a constant temperature room, 19 is a small motor, and 20 is a reducer that reduces the rotational speed of the small motor 19 and increases the rotational force on the output side.

21 is integrally connected to the output shaft of the speed reducer 20.

The shaft 22α, on which the refrigerating room cam 18α and the constant room cam 18b are fitted and rotated, is a refrigerating room connecting rod.

22b is a connecting rod for constant temperature room, and 23α is a connecting rod for cold storage room 22.
a bearing that restricts α to slide only in the axial direction;
23h is a bearing that restricts the constant room connecting rod 22b to slide only in the axial direction, and 24a is a bearing.

A spring 24h exerts a force to pull the damper 15 for a cold storage room back to the cold air introduction port 12α and close it, a spring 24h exerts a force to draw the damper 16 for a constant temperature room back to the cold air introduction port 12h and close it, and 25 a cold air blower. passage 12, cold air inlet 12α, 12h, damper 15, 16, damper arm isa, 16 (Z, outlet 14, Lea
, 17h, cam 18α.

18b, motor 1 speed reducer 20. Shaft 21. Cam 18α.

18b, connecting rod 22α, 22h, bearing 23α, 2
3h, springs 24α, 24bff: This is a multi-damper case that is housed to form a multi-damper device. Here, the multi-damper case 25 is locked from the rear part of the partition to the upper rear part of the refrigerator compartment. 26 is a downstream branch air passage, 27 is an air passage case that forms an independent air passage that seals the downstream branch air passage 26, 28 is a panel that holds a multi-damper case and also serves as a decorative board, and 29 is a refrigerated case. 30 is a constant temperature room box; 31 is a partition plate that divides constant temperature room 4 and vegetable compartment 5; 32 is a vegetable compartment box; 33 is a compartment for vegetable compartment 5. A vegetable compartment return port is provided at the front upper part and blows out the cold air, which has no cooling capacity, into the gap formed in the outer wall of the constant temperature room box 30.

34 is provided at the front upper part of the constant temperature room 4, and 0.35 is the temperature of the cold air blown out from the downstream branch air passage 26, which returns the cold air that has cooling capacity to the refrigerator room 3. A cold air guide 36 guided to blow into the center of the constant temperature room 4 is the vegetable compartment outlet 1 of the multi-damper case 25.
A fresh air path blows out from 7b and sends the descending cold air to the vegetable compartment 5 along the concave groove 37. 38 is a cold air guide that guides the cold air that has descended along the clean breeze path 36 to the center of the vegetable compartment 5.

39 is a freezer compartment door, 40 is a cold top compartment door, 41 is a constant temperature room door that supports the constant temperature room box 30 and opens to take it in and out in the front and rear directions, and 42 supports the vegetable compartment box 30 and opens it in and out in the front and back direction. Open (vegetable compartment, n is shown. 43 is installed in a recess in one corner of the side of the multi-damper case 25).

I installed it by making a slit in the decorative board covering the top. A temperature sensor for the refrigerator compartment that detects the temperature inside the refrigerator compartment 3, 4
4 is a temperature sensor provided in one corner of the constant temperature chamber 4 to detect the temperature inside the constant temperature chamber 4.

Note that a refrigeration cycle device including a compressor, a condenser, etc. for cooling the cooler 9 is omitted from illustration.

The operations of the refrigerator-freezer 1 and the multi-damper device configured as described above will be explained, focusing in particular on the flow of cold air and the temperature maintenance function of the refrigerator compartment 3 and constant temperature room 4. The solid arrows shown in FIGS. 1 to 7 indicate the flow of cold air.

When the refrigerator-freezer 1 is turned on, the refrigeration cycle device consisting of a compressor, a condenser (not shown above), a cooler 9, etc. starts operating, and at the same time the cold air circulation device 7 starts operating and performs a blowing operation to cool the cooler. The cold air cooled in step 9 is blown out through 0103 to cool the inside of the freezer compartment 2, and is then sent from the freezer compartment return air path 11 to the cooler 9.
Return to Freezer room cold air circulation system and inside Freezer room 2? A part of the cold air to be cooled is passed through the cold air blowing path 12 and sent to the refrigerator compartment 3. Constant temperature room 4
．． A cooler 9 that cools the vegetable compartment 5 and may be used as a return air passage 13 to the refrigerator compartment.
The cold air circulation system returns to the refrigerator room and is divided into two parts.

Here, a reference state is assumed as the state of the multi-damper device. That is, it is assumed that the cam phases of the cam for the refrigerator compartment and the cam for the constant temperature room shown in FIGS. 5 and 6 are set to 0 degrees, and the damper for the refrigerator compartment and the damper for the constant temperature room are held in the open state. . Refrigerator room 3 in this case. Constant temperature room 4. The cooling effect of the vegetable compartment 5 will be explained.

First, the cold air cooled by the cooler 9 enters the cold air duct 12 in the multi-damper case 25 and reaches the end of the cold air duct 12, and the cold air enters the cold air inlet 12α on the refrigerator compartment 3 side and the constant temperature room 4. It flows towards the side cold air inlet 12.6.

By the way, now we have damper 15 for the cold room and damper 1 for the constant temperature room.
6 is set to be open, the cold air is divided by the two cold air introduction ports 12α and 12A and flows into the respective yarn paths.

One is from the cold air inlet 12α on the side of the refrigerator compartment 3, through the damper 15 for the refrigerator compartment, and the air outlet 14 for the refrigerator compartment.
It is blown out inside. The refrigerator compartment 3 is kept at a predetermined temperature of 4°C.
is cooled to

The latter one is further branched from the constant temperature room cold air inlet 12b to the constant temperature room air outlet 172 and the vegetable compartment air outlet 17A via the constant temperature room damper 16.

The forward flow of cold air is blown out into the constant temperature room 4 from the constant temperature chamber outlet 17α through the downstream branch air passage 26 sealed by the air passage case 27 and the cold air guide 35 on one side. and,
The constant temperature room 3 is cooled until it reaches a predetermined set temperature of -1°C.

On the other hand, the cold air blown out from the vegetable compartment outlet 17A descends along the back wall surface of the refrigerator compartment 3, and a portion of it is used to cool the refrigerator compartment 3, but most of the air is cooled by the concave grooves 37. Mizokazero 36
The cold air enters the room and is blown out into the vegetable compartment 5 through the cold air guide 3B. The vegetable compartment 5 is cooled by blowing cold air until the temperature reaches a predetermined temperature of 5°C.

Here, when the temperature of the refrigerator compartment 3 reaches a predetermined temperature of 4°C, the refrigerator compartment temperature sensor 43 activates and sends a signal to a control circuit (not shown) to start the motor, and the decelerator 20 operates at lC for 1 second.
The motor rotation, which is several thousand revolutions, is decelerated to approximately one revolution per minute Vt, and a correspondingly large rotational force is obtained and transmitted to the shaft 21. When the refrigerating room cam 18α and the constant room cam 18A fixed to the shaft 21 rotate 90 degrees from the reference position 0 degrees, the motor 19 is stopped and held at that position. As a result, the refrigerating compartment cam 18α changes from a convex portion to a recessed portion, and the refrigerating compartment connecting rod 22α slides in the bearing 23α in the axial direction and contacts the spring 24α.
In conjunction with the damper arm 15α pulled back by the force, the refrigerator compartment damper 15 blocks the cold air introduction port 12α and enters the closed state.

On the other hand, even if the cam position changes by 90 degrees, the constant temperature chamber cam 18b remains in the convex portion, so that the constant chamber connecting rod 22h, the damper arm 16α, and the constant chamber damper 16 resist the spring 24h.
remains stationary, and the damper 16 for the constant temperature room is connected to the cold air inlet 1.
Maintain the open state by taking a position as far away as possible from 2A.

By doing this, the blowing of cold air to the refrigerator compartment 3 is stopped and the cooling effect of the refrigerator compartment 3 is stopped, whereas the blowing of cold air to the constant temperature room 4 and the vegetable compartment 5 is continued, and the cooling effect is maintained. be done.

Next, when the temperature of the constant temperature room 4 reaches a predetermined temperature of 11°C, the temperature sensor 44 for the constant temperature room operates and sends a signal to the control circuit to start the motor 19 again, and the motor 19 rotates. 18α and the constant room cam 18b to the reference position 18
After rotating by 0 degrees, the refrigerator compartment cam 18α remains in the concave portion, and the constant temperature chamber cam 18b changes from a convex portion to a concave portion with the contact portion of the constant chamber connecting rod 22h, explaining the displacement action of the refrigerator compartment cam 18α. In the same manner as above, the constant temperature room connecting rod 22h, the damper arm 16α, and the constant temperature room damper 16 are displaced to move the constant temperature room 4.
The cold air inlet 12h is in a closed state.

Next, when the cold air blowing to the refrigerator compartment 3 stops for a while, the temperature of the refrigerator compartment 3 rises above a predetermined temperature.

A signal to start cooling is sent from the refrigerator temperature sensor 43 to the control circuit, the motor 19 is restarted, and the rotation of the motor 19 moves the refrigerator compartment cam 18α and the constant temperature room cam 18b to the reference position! It can be rotated 7270 degrees.

From this, the refrigerator compartment cam 18α changes from a concave portion to a convex portion, and the rotational force of the refrigerator compartment cam 18α causes the spring 2 to
The connecting rod for the refrigerator compartment 22α resists the force of 4α.

The damper arm 15α and the refrigerator compartment damper 15 are displaced, and the cold air inlet 12α is opened. Then, the blowing of cold air to the refrigerator compartment 3 is started again, and the cooling effect is performed.

On the other hand, since the constant temperature chamber cam 18h remains in the concave portion, the constant temperature chamber damper remains closed, and the blowing of cold air to the constant temperature chamber 4 remains stopped.

After a short period of time, the temperature in the constant temperature room 4 will rise to a certain level while the cold air is not being blown, so at this time,
A signal to start cooling is transmitted from the constant room temperature sensor 44, and the motor 19 is started by the control circuit. The motor 1
9, the refrigerating room cam 18α and the constant room cam 1815 return to the reference position of 0 degrees.

Here, since the operation of the multi-damper device and the cooling effect of the cold air are as described above, detailed explanation will be omitted.

As described above, one cycle of operation of the multi-damper device is repeated, and the refrigerator compartment 3. Constant temperature room 4 and vegetable room 5
cooling continues.

By the way, the refrigerating room cam 18α and the constant room cam 18b used in this multi-damper device have the following features.

There are four combinations (2 to the power of the number of dampers) to drive two dampers with one motor and control the two positions of open and close.
However, as shown in FIG. 5, they can be arranged so as to take a continuous open state or closed state. From this, as shown in FIG. 6, the cam shape only needs to have a minimum number (i.e., one) of unevenness. Furthermore, the two cam shapes can have the same shape if the phases are matched.

Another practical example will be explained using FIGS. 7 and 8.

Until now, the temperature control of the vegetable compartment has been dependent on the opening and closing of the damper 16 for the constant temperature room, but this can also be controlled independently. That is, the vegetable compartment cam 18C1, the vegetable compartment connecting rod 22c, the bearing 23c, the vegetable compartment damper 46. A damper opening/closing device consisting of a damper arm 46α and a damper ring (not shown) is added. Then.

Three dampers are driven by a single motor to control opening and closing, so a combination of opening and closing can be performed.

However, as shown in FIG. 8, they can be arranged so as to take a continuous open state or closed state.

From the kneading process, as shown in Figure 6, prepare a cam with one unevenness every 180 degrees and a cam (not shown) with two unevenness every 90 degrees, and use the former for the refrigerator room. The method can be applied to cams and constant room cams, and the latter can be applied to vegetable room cams.

By doing this, the multi-damper device consisting of one small motor 19, reducer 20, and three damper opening/closing devices can be installed in the refrigerator compartment 3. Constant temperature room 4. Since the three compartments are cooled by arbitrarily selecting the opening/closing state using a signal from a temperature sensor provided in each of the vegetable compartments 5 and a control circuit, independent temperature control is possible.

Hereinafter, the operation of the multi-damper device and the cooling effect of the refrigerator compartment, constant temperature room, and vegetable compartment will be the same as described above, so a description thereof will be omitted.

According to the embodiment described above, one motor, one shaft,
A multi-damper device consisting of multiple cams, connecting rods, damper arms, and dampers is set in one multi-damper case, and extends from the rear of the partition to the upper rear of the refrigerator compartment 3. There is no reduction in the effective internal volume of the vegetable compartment.

Small motor? : Only one unit is used, so power consumption is extremely low. Furthermore, since it is sufficient to manufacture one set of multi-damper devices for each freezer/refrigerator, the manufacturing cost is low.

Since multiple temperature controls can be performed simultaneously using multiple dampers, once the set temperature of each room is set, even if the set temperature of other rooms (for example, the refrigerator compartment) is changed, the temperature will be controlled independently. (For example, in a constant temperature room or vegetable room) The temperature can be maintained with little temperature change.

In addition, depending on whether there is an excess or shortage of cold air, the control circuit can select the cam position within the multi-damper device, that is, open or close the damper, and introduce or stop the introduction of cold air, allowing for fine-grained temperature control.

〔Effect of the invention〕

According to one aspect of the present invention, as described in detail above.

It is possible to provide a refrigerator-freezer that maintains a refrigerator compartment and a constant temperature room at a predetermined temperature with high precision, and does not reduce the effective internal volume of the constant temperature room and vegetable compartment.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a refrigerator-freezer according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is an enlarged view showing details of the multi-damper device in Fig. 1. 4 is a sectional view taken along the line C-C in FIG. 3; FIG. 5 is a diagram showing the opening and closing states of the damper for the refrigerator room and constant temperature room corresponding to the cam phase;
FIG. 6 is an explanatory diagram showing the shape and phase of the cam, FIG. 7 is an explanatory diagram showing another embodiment of the multi-damper device, and FIG. . FIG. 3 is an explanatory diagram showing the open and closed states of the pump. 1... Refrigerator freezer, 18α... Cam for refrigerator compartment. 2... Freezer room, 18h... Cam for constant temperature room. 3... Refrigerator room, 19... Motor. 4... Constant temperature room, 20... Decelerator. 5... Vegetable compartment, 25... Multi damper case. 8...Cold air circulation device, 26...Downstream branch air passage. 9...Cooler, 43...Refrigerating room temperature sensor. 12...Cold air ventilation path, 44...Temperature sensor for constant room. Section f Z A, J Collection I'''B Section (a)) Cam for coins (, b) Temperature chamber ■Cam compilation■C Collection diagram

Claims (1)

[Claims] 1. It has a freezer compartment, a refrigerator compartment, and at least one constant temperature room attached to the refrigerator compartment, and is provided at the opening of each cold air duct for guiding cold air for cooling to the refrigerator compartment and the constant temperature room. The refrigerator is equipped with a temperature control device that can control the temperature of the refrigerator compartment and the constant temperature room by changing the opening degree of the damper according to the set temperature of each damper and adjusting the flow rate of cold air in the cold air blowing path. In a refrigerator, a plurality of cold air inlet ports and dampers are installed in the cold air duct for guiding cold air for cooling to the refrigerator compartment and constant temperature room, and the open/close position of the damper is controlled by one small motor according to the set temperature of each compartment. A refrigerator-freezer characterized by having a multi-damper device that can be selectively opened and closed to independently adjust the flow rate of cold air in branch air paths to each room.