CN111121368B

CN111121368B - Refrigeration appliance and control method thereof

Info

Publication number: CN111121368B
Application number: CN201811293918.4A
Authority: CN
Inventors: 朱啟武; 朱卫忠; 刘翔宇; 沈凌峰; 王宝阳
Original assignee: BSH Electrical Appliances Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: BSH Electrical Appliances Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2018-11-01
Filing date: 2018-11-01
Publication date: 2022-10-28
Anticipated expiration: 2038-11-01
Also published as: CN111121368A

Abstract

The invention provides a control method of a refrigeration appliance, wherein the refrigeration appliance comprises the following steps: a storage compartment for storing articles; a drying space disposed in the storage chamber; an evaporator to cool air that may be delivered to the storage compartment and/or the drying space; the control method comprises the following steps: and after the storage chamber starts cooling, judging whether to start to convey cooled air to the drying space or not based on the cooling operation condition of the storage chamber. The invention also provides a refrigeration appliance, which comprises a control unit, wherein the control unit controls the operation of the refrigeration appliance according to the control method.

Description

Refrigeration appliance and control method thereof

Technical Field

The invention relates to the technical field of refrigeration, in particular to a household refrigerator and a control method thereof.

Background

The current refrigerator technology can basically realize the setting of different kinds of food corresponding to different storage temperatures. However, as the refrigerator goes deep into people's daily life, users have more and more functional requirements on the refrigerator, and for example, people also want to use the refrigerator to store dry goods such as medicines, cigarettes, tea leaves, traditional Chinese medicines and the like, which requires a low humidity environment.

Therefore, a refrigerator with a dry space is produced, which not only has a refrigerating effect, but also can effectively keep the stored articles dry. Reference may be made specifically to the chinese utility model with publication number CN 204359027U.

Disclosure of Invention

In one aspect, the present invention provides a method of controlling a refrigeration appliance, wherein the refrigeration appliance includes: a storage compartment for storing articles; a drying space disposed in the storage chamber; an evaporator to cool air that may be delivered to the storage compartment and/or the drying space; the control method comprises the following steps:

and after the storage chamber starts cooling, judging whether to start to convey cooled air to the drying space or not based on the cooling operation condition of the storage chamber.

Optionally, the refrigeration operation condition of the storage chamber includes a temperature of the evaporator; the control method comprises the following steps:

and when the temperature of the evaporator is lower than a first preset temperature, starting to convey cooled air to the drying space.

Optionally, the cooling operation condition of the storage chamber comprises the temperature of the storage chamber; the control method further comprises the following steps:

and when the temperature of the storage chamber is lower than a second preset temperature, the cooled air is started to be conveyed to the drying space.

Alternatively, the second preset temperature may be set as a set storage temperature of the storage chamber.

Optionally, the refrigeration operation condition of the storage chamber comprises the continuous refrigeration time of the storage chamber; the control method comprises the following steps:

and after the continuous refrigerating time after the storage chamber starts refrigerating reaches a first preset time, starting to convey cooled air to the drying space.

Optionally, the first preset time is changed based on a change in ambient temperature.

Optionally, the control method further includes:

and when the temperature of the drying space is lower than a third preset temperature, stopping conveying the cooled air to the drying space.

Optionally, the third preset temperature is set to a freezing temperature.

Optionally, the control method further includes:

and when the temperature of the evaporator reaches a fourth preset temperature, stopping conveying the cooled air to the drying space.

Optionally, the control method further includes:

and stopping delivering the cooled air to the drying space after the time for delivering the cooled air to the drying space is started to reach a second preset time.

Optionally, the second preset time is changed based on a change in ambient temperature.

The invention also provides a refrigeration appliance, which comprises a control unit, wherein the control unit controls the operation of the refrigeration appliance according to the control method of any one of the above.

Drawings

FIG. 1 is a schematic longitudinal plane view of a refrigerator body according to an embodiment of the present invention;

fig. 2 is a simple flow chart for controlling the supply of cold air to the drying space according to the present invention.

Detailed Description

In the drying space constructed in the prior art, a drying environment with a low relative humidity is formed in a closed drying space by blowing low-temperature dry air into the drying space and then using the principle that the relative humidity changes with the temperature, however, most of the control methods of the drying space simply control the start or stop of blowing cold air into the drying space, and the time point of the start or stop cannot be precisely controlled to ensure the specific drying degree of the blown cold air, so that the humidity in the drying space cannot be precisely controlled. In addition, the cold air is blown for a long time often to waste electric energy, and unnecessary freezing occurs in the drying space to influence the storage effect of the articles.

One of the problems solved by the present invention is how to more precisely control the point in time when the supply of cold air to the drying space is started or stopped during the operation of the refrigeration appliance.

To solve the above problems, in one aspect, the present invention provides a method for controlling a refrigeration appliance, wherein the refrigeration appliance includes: a storage compartment for storing articles; a drying space disposed in the storage chamber; an evaporator to cool air that may be delivered to the storage compartment and/or the drying space; the control method comprises the following steps:

after the storage chamber starts cooling, whether to start to convey cooled air to the dry space is determined based on the cooling operation condition of the storage chamber.

The drying space may be provided as a dry storage device having at least one air opening. The air port can comprise an air inlet and an air outlet, and the air inlet and the air outlet can be respectively provided with an air door to realize the opening and closing of the air port. The cold air cooled and dehumidified by the evaporator can be conveyed to the drying and storage device through the air inlet. The replaced gas in the dry storage device can be discharged through the air outlet. The dry storage device may be a box body having an opening portion for storing and taking articles and a cover body for covering the opening portion. The dry storage device can also be a drawer type box body which comprises a drawer body capable of being pulled out and a female seat box body used for accommodating the drawer body.

When the storage chamber needs to be refrigerated, the refrigeration cycle system of the refrigeration appliance operates, and the time point for starting to convey the cooled and dehumidified air to the drying space is determined by acquiring the refrigeration operation condition of the storage chamber. The cooling operation condition of the storage compartment may include a temperature condition of an evaporator for cooling air, a temperature condition of the storage compartment, a continuous cooling time after the storage compartment starts cooling, and the like. Whether the air cooled and dehumidified by the evaporator meets the requirement of having a specific dryness degree under the current condition is determined by obtaining the refrigeration running conditions of the storerooms, so that the better drying effect can be achieved after the cold air with the specific dryness degree is conveyed into the drying space.

Optionally, the cooling operation condition of the storage chamber comprises the temperature of the evaporator; the control method comprises the following steps:

Only when the temperature of the evaporator is low enough, the temperature of the air cooled and dehumidified by the evaporator is low enough to have a specific drying degree, and at the moment, cold air is conveyed to the drying space by starting, and a better drying effect can be achieved on the drying space.

When the temperature of storeroom was low enough, the humidity greatly reduced of the air in the storeroom, air cycle returned the evaporimeter and by the humidity greatly reduced of the air after the evaporimeter cooling dehumidification to guarantee that the air after the evaporimeter cooling possesses specific drying degree, thereby could be carried to drying space, could play more excellent drying effect to drying space.

Alternatively, the second preset temperature may be set to a set storage temperature of the storage chamber.

After the storeroom refrigerates, through a period of time, the temperature of the evaporator or the temperature of the storeroom still cannot meet the requirement of opening to convey cold air to the drying space, and due to the change of the internal environment and the external environment of the drying space, the humidity in the drying space can be gradually increased to exceed unnecessary degree, at the moment, the evaporator should be immediately opened to convey cold air to the drying space so as to reduce the humidity in the drying space, and articles are prevented from being wetted due to the fact that the articles cannot be dried for a long time.

The first preset time is longer as the ambient temperature increases.

Optionally, the control method further includes:

Optionally, the third preset temperature is set to a freezing temperature.

When the temperature of the drying space is too low, freezing is likely to occur, and at this time, the supply of the cooled and dehumidified air to the drying space is stopped to prevent the stored articles from being frozen.

Optionally, the control method further includes:

The fourth predetermined temperature is higher than the first predetermined temperature. If the evaporator temperature is too high, the humidity of the air cooled and dehumidified by the evaporator becomes too high, and the cool air at this time does not exert a drying effect on the drying space, and therefore, the supply of the cool air to the drying space is stopped.

Optionally, the control method further includes:

Thereby avoiding blowing cold air for too long time to waste electric energy and causing unnecessary freezing in the drying space to influence the storage effect of the articles.

The second preset time is longer as the ambient temperature increases. Since the higher the ambient temperature, the higher the humidity, the longer the time for delivering cold air to the drying space is required to obtain a more excellent drying effect.

Through controlling when to start to carry air conditioning to the drying space more accurately, ensure that the drying space obtains the absolute dry low temperature air who is dehumidified by the evaporimeter cooling, improve the dehumidification efficiency of drying space greatly, guarantee the low humidity in the drying space.

By controlling more precisely when to stop delivering the cold air to the drying space, the drying space is ensured not to be frozen due to the supercooling of the drying space in the process of dehumidifying by the delivered cold air, so as to avoid the stored articles from being frozen and the like.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention is described by taking the refrigeration appliance as a household refrigerator as an example, and the invention can be applied to a two-door refrigerator, a three-door refrigerator, a side-by-side refrigerator, a multi-door refrigerator and the like.

FIG. 1 is a schematic longitudinal plane view of a refrigerator body according to an embodiment of the present invention. As shown in fig. 1, a home refrigerator in one embodiment of the present invention has a cabinet 1 having a storage chamber 2, a refrigeration cycle system, and a control unit (not shown in the drawings) controlling the refrigeration cycle system. Which includes a compressor (not shown), a condenser (not shown), a throttling element (not shown), and an evaporator 3. In particular, a drying space 4 having an independent closed space is provided in the storage chamber 2 to store dry goods. The control unit is connected with a first temperature sensor 31 for detecting the evaporator temperature, a second temperature sensor 21 for detecting the refrigerator storage compartment temperature, and a third temperature sensor 41 for detecting the temperature of the drying space 4, respectively. In the present embodiment, the storage chamber 2 is a refrigerating chamber of a refrigerator, and its normal set temperature is 2 to 8 degrees, but in other embodiments, the storage chamber 2 may be provided as a zero-degree chamber or a temperature-variable chamber of a refrigerator.

The evaporator 3 is arranged between the rear wall 10 of the cabinet 1 and the cover plate 11, and the space in which the evaporator 3 is placed may be referred to as an evaporator chamber, the rear wall 10 and the cover plate 11 being the walls of the evaporator chamber. The fan 5 is an evaporator fan disposed adjacent to and above the evaporator 3, and the fan 5 is configured to blow the air flow cooled and dehumidified by the evaporator 3 toward the storage chamber 2 and/or the drying space 4, and the direction of the arrows in fig. 1 indicates the circulating flow direction of the air flow. In particular, the drying space 4 may be provided with an air inlet 42 and an air outlet 43, and the air inlet 42 and the air outlet 43 may be provided with a first damper 44 and a second damper 45, respectively, to achieve opening and closing of the air outlets. On the one hand, the cooled and dehumidified airflow can enter the storage chamber 2 through the air outlet duct 61; on the other hand, the drying space 4 communicates with the evaporator chamber via an air inlet 42, through which air inlet 42 the cooled and dehumidified air flow can be conveyed to the drying space 4 and replaced with relatively hot air in the drying space 4. The replaced gas in the drying space 4 can be discharged into the storage chamber 2 through the outlet 43. The air flow after heat exchange in the storage compartment 2 can be returned to the evaporator compartment via the return duct 62 and into the next air flow cycle. This realizes the ventilation and dehumidification effect in the drying space 4.

The first temperature sensor 31 may be provided on the evaporator 3 to detect the temperature of the evaporator 3. The second temperature sensor 21 may be provided on an inner wall of the storage chamber 2 to detect the temperature inside the storage chamber 2. The third temperature sensor 41 may be provided on an inner wall of the drying space 4 to detect the temperature inside the drying space 4. The temperature conditions detected by the three sensors are fed back to a control circuit board of the control unit for processing. The control unit sends corresponding control signals to the compressor, the evaporator 4, the fan 5, the first damper 44, the second damper 45 and other components according to the processing result, so as to control the refrigerating operation of the storage chamber 2 and control the delivery of cold air to the drying space 4.

Fig. 2 is a simple flow chart for controlling the supply of cold air to the drying space according to the present invention. As shown in fig. 2, when the storage chamber 2 has a cooling demand, for example, when the second temperature sensor 21 detects that the temperature in the storage chamber 2 reaches a start-up temperature for cooling, the refrigerator control unit controls the operation of the cooling cycle system to cool the storage chamber 2. The compressor, condenser, and evaporator 3 and fan 5 are started. The fan 5 blows the air flow cooled and dehumidified by the evaporator 3 toward the storage chamber 2 in the air flow circulation direction indicated by the arrow in fig. 1 to cool the storage chamber 2. At this time, the air inlet 42 and the air outlet 43 of the drying space 4 are respectively closed by the first damper 44 and the second damper 45, so that the drying space 4 forms an independent and sealed dry storage environment.

During the cooling process of the storage chamber 2, the refrigerator control unit controls whether to blow the cooled and dehumidified airflow to the drying space 4, i.e., whether to open the first damper 44 and the second damper 45, according to the obtained cooling operation condition of the storage chamber 2. The first damper 44 and the second damper 45 may be controlled to open simultaneously or sequentially, for example, the first damper 44 may be opened for a period of time before the second damper 45 is opened. The first damper 44 and the second damper 45 may be provided as controlled electric dampers. When the drying space 4 requires ventilation, at least the first damper 44 opens the airflow dehumidified by cooling to blow toward the drying space 4 in the airflow circulation direction indicated by the arrow in fig. 1; when the drying space 4 does not require air supply, at least the first damper 44 is closed, in which case the second damper 45 is also closed.

The following description will take an example in which the first damper 44 and the second damper 45 are simultaneously opened or closed.

When the cooling operation condition of the storage chamber 2 satisfies the starting condition for starting the blowing of the cooled and dehumidified air flow to the drying space 4, the refrigerator control unit controls to simultaneously open the first damper 44 and the second damper 45, and the cooled and dehumidified air flow can be delivered to the drying space 4 through the air inlet 42 and replaced with the air with relatively high temperature in the drying space 4. The replaced gas in the drying space 4 can be discharged into the storage chamber 2 through the outlet 43.

Specifically, the cooling operation condition of the storage chamber 2 includes a temperature condition of the evaporator 3 for cooling operation of the storage chamber 2. One case where the above-described start-up condition is satisfied is: when the first temperature sensor 31 detects that the temperature of the evaporator 3 is lower than the first preset temperature, the supply of the cooled and dehumidified air to the drying space 4 is started, i.e. the first damper 44 and the second damper 45 are opened simultaneously. The first preset temperature may be set to-5 degrees to-10 degrees. Only if the temperature of the evaporator 3 is sufficiently low, the cooled dehumidified air reaches a sufficient specific dryness level.

Specifically, the cooling operation condition of the storage chamber 2 includes a temperature condition of the storage chamber 2. One case where the above-described start-up condition is satisfied is: when the temperature of the storage chamber 2 detected by the second temperature sensor 21 is lower than the second preset temperature, the supply of the cooled and dehumidified air to the drying space 4 is started, that is, the first damper 44 and the second damper 45 are opened simultaneously.

The second preset temperature may be set to a set storage temperature of the storage chamber 4, for example, a refrigerating temperature between 2 degrees and 8 degrees.

When the temperature of the storage chamber 2 is sufficiently low, the humidity of the air in the storage chamber 2 is greatly reduced, and the humidity of the air which is circulated back to the evaporator 3 and cooled by the evaporator 3 is also greatly reduced, thereby ensuring that the air cooled by the evaporator 3 has a specific dryness.

Specifically, one case where the above-described start-up condition is satisfied is: when the temperature of the evaporator 3 detected by the first temperature sensor 31 is lower than the first preset temperature and the temperature of the storage chamber 2 detected by the second temperature sensor 21 is lower than the second preset temperature, the supply of the cooled and dehumidified air to the drying space 4 is started, that is, the first damper 44 and the second damper 45 are opened simultaneously. This further ensures that the cooled dehumidified air is delivered to the drying space 4 with a certain degree of dryness.

Specifically, the cooling operation condition of the storage compartment 2 includes a continuous cooling time of the storage compartment 2. One case where the above-described start-up condition is satisfied is: when the cooling duration after the start of cooling in the storage chamber 2 reaches the first preset time, the supply of the cooled and dehumidified air to the drying space 4 is started, that is, the first damper 44 and the second damper 45 are opened at the same time.

The first preset time is changed based on a change in ambient temperature. The first preset time for the storage chamber 2 to continuously cool is longer as the ambient temperature is higher, for example, the first preset time may be 10 minutes when the ambient temperature is high in summer; when the ambient temperature is low in winter, the first preset time may be 5 minutes.

After starting the supply of the cooling dehumidified airflow to the drying space 4, the refrigerator control unit controls to close the first damper 44 and the second damper 45 at the same time when a stop condition for stopping the blowing of the cooling dehumidified airflow to the drying space 4 is satisfied.

Specifically, one case where the above-described stop condition is satisfied is: when the third temperature sensor 41 detects that the obtained temperature of the drying space 4 is lower than the third preset temperature, the supply of the cooled and dehumidified airflow to the drying space 4 is stopped, i.e. the first damper 44 and the second damper 45 are closed at the same time.

The third preset temperature is set to a freezing temperature, for example 0 degrees or-1 degrees. When the temperature of the drying space 4 is too low, freezing is likely to occur, and the supply of the cooled air to the drying space 4 is stopped to prevent the stored articles from being frozen.

Specifically, one case where the above-described stop condition is satisfied is: when the temperature of the evaporator 3 detected by the first temperature sensor 31 reaches the fourth preset temperature, the supply of the cooled and dehumidified airflow to the drying space 4 is stopped, that is, the first damper 44 and the second damper 45 are closed at the same time.

The fourth preset temperature is higher than the first preset temperature and may be set to-3 degrees, for example. If the temperature of the evaporator 3 is too high, the humidity of the air cooled by the evaporator 3 becomes too high, and the cool air at this time does not have an effective drying effect on the drying space 4, and therefore, the supply of the cool air to the drying space 4 is stopped.

Specifically, one case where the above-described stop condition is satisfied is: after the time for starting the supply of the cooled and dehumidified airflow to the drying space 4 reaches the second preset time, the supply of the cooled air to the drying space is stopped, i.e. the first damper 44 and the second damper 45 are closed at the same time.

The second preset time may be set to a fixed time, for example, 30 minutes. Or the second preset time may be changed based on a change in the ambient temperature. For example, the second preset time is longer as the ambient temperature increases. Since the higher the ambient temperature, the higher the humidity, the longer the time for delivering cold air to the drying space is required to obtain a more excellent drying effect.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method of a refrigeration appliance, wherein the refrigeration appliance includes:

a storage compartment for storing articles;

a drying space disposed in the storage chamber;

an evaporator to cool air that may be delivered to the storage compartment and/or the drying space;

the control method is characterized by comprising the following steps:

after the storage chamber starts cooling, judging whether to start to convey cooled air to the drying space based on the cooling operation condition of the storage chamber; the refrigerating operation condition of the storage chamber comprises the temperature of the storage chamber, and the cooled air is started to be delivered to the drying space when the temperature of the storage chamber is lower than a second preset temperature.

2. The control method of a refrigerating appliance according to claim 1, wherein the refrigerating operation condition of the storage compartment includes a temperature of the evaporator; the control method comprises the following steps:

3. The control method of a refrigerating appliance according to claim 1, wherein the second preset temperature may be set as a set storage temperature of the storage compartment.

4. The control method of a refrigeration appliance according to claim 1, wherein the cooling operation condition of the storage room includes a continuous cooling time of the storage room; the control method comprises the following steps:

5. The control method of a refrigerator according to claim 4, wherein the first preset time is changed based on a change in ambient temperature.

6. The control method for a refrigeration appliance according to any one of claims 1 to 5, characterized by further comprising:

7. The control method for a refrigerator appliance according to claim 6, wherein the third preset temperature is set to a freezing temperature.

8. The control method for a refrigeration appliance according to any one of claims 1 to 5, characterized by further comprising:

9. The control method for a refrigeration appliance according to any one of claims 1 to 5, characterized by further comprising:

10. The control method of a refrigerator according to claim 9, wherein the second preset time is changed based on a change in ambient temperature.

11. A refrigeration appliance comprising a control unit, wherein the control unit controls the operation of the refrigeration appliance according to the control method of any preceding claim.