CN117249648A - Control method of single-system refrigerator - Google Patents

Abstract

The invention provides a control method of a single-system refrigerator, which comprises a refrigerating system, a refrigerating chamber, a freezing chamber, a fan and a refrigerating air door. The control method comprises the following steps: acquiring the ambient temperature around the single-system refrigerator; and in response to the ambient temperature not being higher than a preset refrigeration starting temperature of the refrigerating chamber and the defrosting process being finished, starting the fan and the refrigeration air door, and performing air flow internal circulation between an evaporator of the refrigeration system and the refrigerating chamber. According to the control method of the single-system refrigerator, hot air is supplied to the refrigerating chamber, so that heat is supplied to the refrigerating chamber, an inherent temperature layer of the refrigerating chamber is broken, and partial condensation and frosting of the refrigerating chamber when the ambient temperature is low are avoided. Moreover, heat is generated by defrosting the evaporator, so that energy can be saved and the evaporator is more economical.

Description

Control method of single-system refrigerator

Technical Field

The invention relates to the technical field of storage refrigeration, in particular to a control method of a single-system refrigerator.

Background

The refrigerating chamber of the common single-system refrigerator is provided with a refrigerating air door and an air return opening. The temperature of the refrigerating chamber is detected by the sensor, after the temperature rises to the starting point, the refrigerating air door is opened, cold air blown by the fan conveys cold energy to the refrigerating chamber through the refrigerating air door, and then the cold air returns to the cooling chamber provided with the evaporator through the air return opening, so that the temperature of the refrigerating chamber is reduced. When the temperature is reduced to the set shutdown point, the refrigerating air door is closed, and the refrigerating chamber stops refrigerating. However, when the ambient temperature is lower, the temperature of the refrigerating chamber is balanced with the ambient temperature, the temperature cannot reach the starting point of the refrigerating chamber, and the refrigerating air door is normally closed, so that no air flows in the refrigerating chamber, temperature layering gradually occurs in the refrigerating chamber, the temperature layering is fixed along with the time, and the problem of uneven cold and heat in the refrigerating chamber is caused; meanwhile, because of the temperature difference between the freezing chamber and the refrigerating chamber, cold air in the freezing chamber slowly flows to the refrigerating chamber through the return air inlet, and the cold air is heavy and sinks to the bottom of the refrigerating chamber, so that the refrigerating chamber is partially condensed and frosted.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a control method of a single-system refrigerator that overcomes or at least partially solves the above problems, by supplying hot air to a refrigerating chamber, not only provides heat to the refrigerating chamber, but also breaks an inherent temperature layer of the refrigerating chamber, thereby preventing the refrigerating chamber from being partially frozen and frosted when an ambient temperature is low. And the heat is generated by defrosting of the evaporator, so that energy can be saved and the evaporator is more economical.

Specifically, the invention provides a control method of a single-system refrigerator, which comprises a refrigerating system, a refrigerating chamber, a freezing chamber, a fan and a refrigerating air door;

the control method comprises the following steps:

acquiring the ambient temperature around the single-system refrigerator;

and in response to the ambient temperature not being higher than a preset refrigeration starting temperature of the refrigerating chamber and the defrosting process being finished, starting the fan and the refrigeration air door, and performing air flow internal circulation between an evaporator of the refrigeration system and the refrigerating chamber.

Optionally, in the refrigeration system starting state, acquiring the ambient temperature around the single-system refrigerator.

Optionally, in response to the ambient temperature not being higher than a preset refrigeration on temperature of the refrigeration compartment and the temperature of the freezer reaching a preset refrigeration off temperature, a defrosting procedure is initiated.

Optionally, in response to the ambient temperature not being higher than a preset refrigeration start-up temperature of the refrigeration chamber, determining whether the temperature of the freezer reaches a preset refrigeration shut-down temperature.

Optionally, in a state that the refrigeration damper is closed and the refrigeration system and the fan perform work of supplying cold energy to the freezing chamber, judging whether the temperature of the freezing chamber reaches a preset freezing shutdown temperature.

Optionally, the single-system refrigerator further comprises a fan shielding device;

and when the air flow circulates in the air flow, the fan shielding device is used for cutting off a freezing air path between the fan and the freezing chamber.

Optionally, in response to the temperature detected by the defrosting sensor of the single-system refrigerator being not less than a preset temperature value, the defrosting process ends.

Optionally, the air flow internal circulation is stopped after reaching a first set time period.

Optionally, the defrosting procedure comprises:

and heating the evaporator of the refrigeration system when the refrigeration system and the fan are closed for a second set period of time.

Optionally, the refrigeration system is activated in response to the air flow internal circulation stopping and the freezer compartment reaching a preset freezer-to-start temperature.

In the control method of the single-system refrigerator, hot air is supplied to the refrigerating chamber, so that heat is supplied to the refrigerating chamber, an inherent temperature layer of the refrigerating chamber is broken, and partial condensation and frosting of the refrigerating chamber when the ambient temperature is low are avoided. And the heat is generated by defrosting of the evaporator, so that energy can be saved and the evaporator is more economical. Furthermore, the single-system refrigerator solves the problem of partial condensation and frosting of the refrigerating chamber when the ambient temperature is low by utilizing the structure and the characteristics of the single-system refrigerator, and no new hardware is added, so that the single-system refrigerator is simple in structure and convenient to control.

The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

fig. 1 is a schematic partial flowchart of a control method of a single-system refrigerator according to an embodiment of the present invention;

fig. 2 is a schematic flowchart of a control method of a single system refrigerator according to an embodiment of the present invention.

Detailed Description

A control method of a single system refrigerator according to an embodiment of the present invention will be described with reference to fig. 1 to 2. In the description of the present embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature, i.e. one or more such features. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. When a feature "comprises or includes" a feature or some of its coverage, this indicates that other features are not excluded and may further include other features, unless expressly stated otherwise.

Unless specifically stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," "coupled," and the like should be construed broadly, as they may be connected, either permanently or removably, or integrally; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. Those of ordinary skill in the art will understand the specific meaning of the terms described above in the present invention as the case may be.

Furthermore, in the description of the present embodiments, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature therebetween. That is, in the description of the present embodiment, the first feature being "above", "over" and "upper" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature "under", "beneath", or "under" a second feature may be a first feature directly under or diagonally under the second feature, or simply indicate that the first feature is less level than the second feature.

In the description of the present embodiment, a description referring to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiment of the invention provides a control method of a single-system refrigerator, which can comprise a refrigerator body, a door body, a refrigerating system and a fan. A freezing chamber, a refrigerating chamber and a cooling chamber can be arranged in the box body. The refrigeration system may have a compressor, a condenser, a throttling device, and an evaporator. In particular, the compressor, condenser, throttle device, evaporator and fan of the single-system refrigerator are all one. The rear side of the freezing chamber is provided with a cooling chamber. The refrigerating chamber is arranged on the upper side of the freezing chamber. The evaporator is arranged in the cooling chamber. The fan is arranged on the upper side of the evaporator, for example, can be arranged at the outlet of the cooling chamber.

The box body is also internally provided with a freezing air passage and a refrigerating air passage. The freezing air path is configured to communicate the cooling chamber and the freezing chamber such that gas in the cooling chamber enters the freezing chamber. The refrigeration air circuit may have a refrigeration damper and be configured to controllably communicate the cooling chamber and the refrigeration chamber to allow air within the cooling chamber to enter the refrigeration chamber.

The temperature of the refrigerating chamber of the single-system refrigerator is detected by the sensor, after the temperature rises to the preset refrigerating start-up temperature, the refrigerating air door is opened, cold air blown by the fan is conveyed to the refrigerating chamber through the refrigerating air door, and then returns to the cooling chamber provided with the evaporator through the air return port of the refrigerating chamber, so that the temperature of the refrigerating chamber is reduced. When the temperature is reduced to the preset refrigeration starting temperature, the refrigeration air door is closed, and the refrigeration of the refrigeration chamber is stopped. However, when the ambient temperature is lower, the temperature of the refrigerating chamber is balanced with the ambient temperature, the temperature cannot reach the starting point of the refrigerating chamber, the refrigerating air door is normally closed, so that no air flows in the refrigerating chamber, temperature layering gradually occurs in the refrigerating chamber and is fixed along with time, and the problem of uneven cold and heat in the refrigerating chamber is caused. And because the temperature difference exists between the freezing chamber and the refrigerating chamber, cold air in the freezing chamber slowly flows to the refrigerating chamber through the return air inlet, and the cold air is heavier and sinks to the bottom of the refrigerating chamber, so that the refrigerating chamber is partially condensed and frosted. To solve this problem, an embodiment of the present invention provides a control method of a single system refrigerator.

The control method of the single-system refrigerator according to the embodiment of the invention is shown in fig. 1, and comprises the following steps:

acquiring the ambient temperature around the single-system refrigerator;

the manner of acquiring the ambient temperature may be implemented using an ambient temperature sensor disposed on a single system refrigerator. For example, the environmental temperature sensor can be arranged at the top of the single-system refrigerator, so that the environmental temperature sensor is convenient for detecting the environmental temperature around the single-system refrigerator, and is not easy to touch and damage by people. Of course, the ambient temperature can be obtained in the start-up state of the refrigeration system or in the shutdown state of the refrigeration system, and the time for obtaining the ambient temperature is not affected by the working state of the refrigeration system, so that the manner for obtaining the ambient temperature can also be selected from the built-in components of a single-series refrigerator for other purposes, such as an ambient temperature acquisition element for controlling the working of the refrigeration start-up and the compressor. By the arrangement, the structure of the single-system refrigerator can be utilized, components are not required to be added, the structure is simple, the control is convenient, and the cost is reduced.

And in response to the ambient temperature not being higher than the preset refrigeration starting temperature of the refrigerating chamber and the defrosting process being finished, opening the fan and the refrigeration air door, and performing air flow internal circulation between the evaporator of the refrigeration system and the refrigerating chamber.

When the ambient temperature is not higher than the preset refrigeration starting temperature of the refrigerating chamber, the problem of partial condensation and frosting of the refrigerating chamber can occur in the refrigerating chamber. And then, the defrosting process of the evaporator is finished, and the fan and the refrigeration air door are started at the moment, so that hot air generated by defrosting of the evaporator can enter the refrigeration chamber and can return to the evaporator through the return air inlet of the refrigeration chamber, and air flow circulation is realized. The hot air at the evaporator provides heat for the refrigerating chamber on one hand, and on the other hand, the flow of the air flow breaks through the inherent temperature layer in the refrigerating chamber, so that the problem of local condensation and frosting of the refrigerating chamber is avoided under the double functions. Moreover, the heat generated by defrosting the evaporator is utilized, so that energy sources can be saved, and the evaporator is more economical. Furthermore, the single-system refrigerator solves the problem of partial condensation and frosting of the refrigerating chamber when the ambient temperature is low by utilizing the structure and the characteristics of the single-system refrigerator, and no new hardware is added, so that the single-system refrigerator is simple in structure and convenient to control.

In some alternative embodiments of the present invention, the two conditions that the ambient temperature is not higher than the preset refrigeration start-up temperature of the refrigeration compartment and the defrosting process is finished are in a parallel relationship, i.e. the time sequence of the two is not required. The method can firstly meet the condition that the ambient temperature is not higher than the preset refrigeration starting temperature of the refrigerating chamber, and then meet the condition that the defrosting program is finished; the defrosting program can be finished firstly, and then the preset refrigeration starting temperature of the refrigerating chamber is not higher than the ambient temperature; or both may be satisfied.

It is known to those skilled in the art that the refrigerator is used for preserving most vegetables, fruits, and remaining foods, dishes, etc., and the temperature inside the refrigerator is generally between 0 ℃ and 9 ℃. Thus, the preset refrigeration start-up temperature may be set between 0 ℃ and 9 ℃, preferably the preset refrigeration start-up temperature is set to 9 ℃.

In some embodiments of the invention, the defrosting process is initiated in response to the ambient temperature not being higher than a preset refrigeration on temperature of the refrigerator and the temperature of the freezer reaching a preset refrigeration off temperature.

The single-system refrigerator further comprises a freezing temperature sensor, wherein the freezing temperature sensor is used for acquiring the temperature in the freezing chamber of the single-system refrigerator. When the freezing temperature sensor detects that the temperature in the refrigerating chamber of the single-system refrigerator reaches the preset freezing shutdown temperature and the ambient temperature is not higher than the preset refrigerating startup temperature of the refrigerating chamber, a defrosting program is started. Because the temperature of the freezing chamber reaches the preset freezing shutdown temperature, the compressor stops running, the evaporator does not generate cold energy any more, and a defrosting program is started at the moment so as to defrost the evaporator. By the arrangement, the situation that the compressor is not stopped yet, the evaporator generates cold energy, and a defrosting process is started to cause heat loss can be avoided.

It can be known by those skilled in the art that the freezing chamber has the function of quick freezing and freezing, and is mainly used for preserving foods such as fresh fish, shrimp and meat, and the like, so as to avoid spoilage. The temperature in the freezer compartment is typically between-24 ℃ and-12 ℃. Thus, the preset freeze shutdown temperature may be set between-24 ℃ and-12 ℃, preferably the preset freeze shutdown temperature is set at-20 ℃.

In some other embodiments of the present invention, it may also be determined whether to start the defrosting process according to the temperature of the evaporator. For example, a single system refrigerator also includes a defrost sensor for detecting the temperature at the evaporator. When the temperature of the evaporator is low, the evaporator is already frosted and thick, and a defrosting procedure needs to be started to prevent the frosting of the evaporator from affecting the refrigerating effect.

In some embodiments of the present invention, it is determined whether the temperature of the freezing chamber reaches a preset freezing shutdown temperature in a state where the refrigerating damper is closed and the refrigerating system and the blower perform work for supplying cold to the freezing chamber. The refrigerating air door is closed, and at the moment, the refrigerating system and the fan only provide cold energy for the freezing chamber, so that the freezing chamber is facilitated to be quickly cooled, and the preset freezing shutdown temperature is further quickly reached.

In some embodiments of the invention, the single system refrigerator further comprises a fan shielding device. When the air flow circulates in the air flow, a fan shielding device is used for cutting off a freezing air path between the fan and the freezing chamber. Due to the fan shielding device, heat generated by defrosting of the evaporator cannot enter the freezing chamber, and the temperature rise of the freezing chamber is avoided. Meanwhile, most of heat generated by defrosting of the evaporator enters the refrigerating chamber, so that condensation and frosting of the refrigerating chamber are avoided. For example, the fan shielding device comprises a base, a ring-shaped shielding member arranged on the outer ring of the base, a centrifugal wind wheel arranged in the shielding member, and one or more vertical upward wind shields. The fan shielding device is connected with the freezing air passage, the centrifugal wind wheel is connected with the fan, so that air flow can be promoted to enter the freezing air passage, and the wind shield can completely shield the freezing air passage. The shielding piece is rotatably arranged on the base, and the freezing air path between the fan and the freezing chamber can be in a cutting-off state or a conducting state by rotating the shielding piece, so that whether the cooling capacity is provided for the freezing chamber or not during the operation of the fan can be adjusted. In an initial state, the fan shielding device enables the freezing air passage to be in a conducting state. When the air flow circulates, the fan shielding device is in a state of cutting off the freezing air passage.

In some alternative embodiments of the invention, the single-system refrigerator further comprises a freezing air door, and the controller controls the opening and closing of the freezing air door to control the on-off of the freezing air passage, so that when the freezing air door is opened, the compressor and the fan can provide cold energy for the freezing chamber after being started. When the freezing air door is closed, no cooling capacity is provided to the freezing chamber.

In some embodiments of the present invention, the defrosting process ends in response to the temperature detected by the defrosting sensor of the single-system refrigerator being not less than a preset temperature value. That is, when the temperature of the evaporator detected by the defrosting sensor is greater than or equal to a preset temperature value, the defrosting process is ended. For example, the preset temperature value is 6 ℃ to 8 ℃. Preferably, the preset temperature value is 7 ℃. The single-system refrigerator further comprises a defrosting heating device, wherein the defrosting heating device is used for heating the evaporator so as to complete defrosting. Preferably, the defrosting heating device is a heating wire, and the heating wire is arranged below the evaporator so as to finish heating the evaporator.

In some embodiments of the invention, the gas flow internal circulation is stopped after a first set period of time is reached. For example, the first set period of time is 8min to 12min. Preferably, the first set duration is 10 minutes. After the fan works for a first set period of time, the fan stops working, and at the moment, the fan does not blow hot air into the refrigerating chamber any more, so that excessive heat in the refrigerating chamber can be prevented, the temperature is too high, and the preservation of food materials in the refrigerating chamber is not facilitated. And at this time, the fan shielding device is restored to an initial state, that is, a state in which the freezing air passage is made conductive.

In some embodiments of the invention, the defrosting process comprises: and heating the evaporator of the refrigeration system when the refrigeration system and the fan are closed for a second set period of time. The refrigerating system and the fan are closed for a second set period of time, so that the residual cooling of the evaporator can be utilized to continuously provide cooling capacity for the freezing chamber, energy conservation is facilitated, and the evaporator can be naturally defrosted in a natural temperature rising mode. For example, the second set period of time is 4min to 6min. Preferably, the second set period of time is 5 minutes.

In some embodiments of the invention, the refrigeration system is activated in response to the air flow internal circulation stopping and the freezer compartment reaching a preset freezer-to-start temperature. When the freezing temperature sensor detects that the temperature in the freezing chamber of the single-system refrigerator reaches the preset freezing start-up temperature, the refrigerating system is started to refrigerate the freezing chamber, and food materials in the freezing chamber are ensured to be in a freezing state. Since the temperature in the freezer compartment is typically between-24 ℃ and-12 ℃. Thus, the preset freeze-on temperature may be set between-24 ℃ and-12 ℃, preferably the preset freeze-on temperature is set at-14 ℃.

As shown in fig. 2, the control method of the single-system refrigerator according to the embodiment of the invention is as follows:

acquiring the ambient temperature of a single-system refrigerator;

the acquisition of the environmental temperature of the single-system refrigerator can be performed in the starting state of the refrigeration system or in the shutdown state of the refrigeration system, and the time for acquiring the environmental temperature is not influenced by the working state of the refrigeration system.

Closing a refrigeration damper and providing refrigeration capacity to the freezing chamber by the refrigeration system and the fan in response to the ambient temperature not being higher than a preset refrigeration starting temperature of the refrigeration chamber;

judging whether the temperature of the freezing chamber reaches a preset freezing shutdown temperature or not;

responding to the temperature of the freezing chamber reaching a preset freezing shutdown temperature, closing the refrigerating system and the fan for a second set period of time, heating an evaporator of the refrigerating system, and starting a defrosting program;

the temperature at the evaporator detected by the defrosting sensor of the single-system refrigerator can be compared with a set temperature to determine whether to start the defrosting process.

Responding to the fact that the temperature detected by a defrosting sensor of the single-system refrigerator is not smaller than a preset temperature value, and ending the defrosting process;

in response to the defrosting process ending, opening a fan and a refrigeration air door, and performing air flow internal circulation between an evaporator and a refrigeration chamber of the refrigeration system;

the two conditions that the ambient temperature is not higher than the preset refrigeration starting temperature of the refrigerating chamber and the defrosting process is finished can be in a sequential relationship or a parallel relationship, and the sequence of the two conditions is not required. As long as these two conditions are met, a process is initiated that circulates the air flow between the evaporator and the refrigerated compartment of the refrigeration system.

In order to prevent the air flow from directly entering the freezing chamber, a fan shielding device is used for cutting off a freezing air path between the fan and the freezing chamber when the air flow circulates in the freezing chamber.

The internal circulation of the air flow is stopped after reaching a first set duration;

in response to the internal circulation of the air flow stopping, the fan is closed, and the fan shielding device turns on a freezing air path between the fan and the freezing chamber;

and starting the refrigeration system in response to the freezing chamber reaching a preset freezing start-up temperature.

According to the control method of the single-system refrigerator, provided by the embodiment of the invention, after the ambient temperature is low and the defrosting process of the evaporator is finished, hot air is supplied to the refrigerating chamber, so that heat is supplied to the refrigerating chamber, an inherent temperature layer of the refrigerating chamber is broken, and local condensation and frosting of the refrigerating chamber are avoided. And the heat is generated by defrosting of the evaporator, so that energy can be saved and the evaporator is more economical.

By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A control method of a single-system refrigerator is characterized in that,

the single-system refrigerator comprises a refrigerating system, a refrigerating chamber, a freezing chamber, a fan and a refrigerating air door;

the control method comprises the following steps:

acquiring the ambient temperature around the single-system refrigerator;

and in response to the ambient temperature not being higher than a preset refrigeration starting temperature of the refrigerating chamber and the defrosting process being finished, starting the fan and the refrigeration air door, and performing air flow internal circulation between an evaporator of the refrigeration system and the refrigerating chamber.

2. The control method according to claim 1, wherein,

and in the starting state of the refrigerating system, acquiring the ambient temperature around the single-system refrigerator.

3. The control method according to claim 2, wherein,

and starting a defrosting procedure in response to the ambient temperature not being higher than a preset refrigeration starting temperature of the refrigeration chamber and the temperature of the freezing chamber reaching a preset freezing shutdown temperature.

4. The control method according to claim 3, wherein,

and judging whether the temperature of the freezing chamber reaches a preset freezing shutdown temperature or not in response to the environment temperature not being higher than the preset refrigerating startup temperature of the refrigerating chamber.

5. The control method according to claim 4, wherein,

and in a state that the refrigerating air door is closed and the refrigerating system and the fan perform work for providing cold energy for the freezing chamber, judging whether the temperature of the freezing chamber reaches a preset freezing shutdown temperature or not.

6. The control method according to claim 1, wherein,

the single-system refrigerator further comprises a fan shielding device;

and when the air flow circulates in the air flow, the fan shielding device is used for cutting off a freezing air path between the fan and the freezing chamber.

7. A control method according to any one of claims 1 to 6,

and responding to the fact that the temperature detected by the defrosting sensor of the single-system refrigerator is not smaller than a preset temperature value, and ending the defrosting process.

8. The control method according to claim 7, wherein,

the internal circulation of the air flow is stopped after the first set time period is reached.

9. The control method according to any one of claims 1 to 6, characterized in that,

the defrosting process comprises the following steps:

and heating the evaporator of the refrigeration system when the refrigeration system and the fan are closed for a second set period of time.

10. The control method according to any one of claims 1 to 7, characterized in that,

and starting the refrigeration system in response to the air flow internal circulation stopping and the freezing chamber reaching a preset freezing start-up temperature.