Refrigerator and control method and device thereof

Abstract

The invention relates to the technical field of refrigeration equipment, and discloses a refrigerator and a control method and device thereof. The air path system comprises an air door device and a condenser heat exchanger arranged beside the condenser; the air path system is communicated with the variable temperature chamber to form air flow circulation; the air door device at least can be switched between a first state and a second state; under the condition that the air door device is in the first state, the air path system forms a first air flow path, so that air flow is guided to flow through the evaporator and then flows back to the temperature changing chamber, and the temperature changing chamber is cooled; and under the condition that the air door device is in the second state, the air path system forms a second air flow path, so that the air flow is guided to flow through the evaporator and then flow through the condenser heat exchanger, and the air flow exchanges heat with the condenser to be heated and then flows back to the temperature changing chamber. Through switching of the air door device, wide-area temperature control is achieved, and diversified storage requirements of users are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, for example, to a refrigerator and a control method and device thereof. BACKGROUND

[0002] A refrigerator is a refrigeration equipment that keeps constant low temperature, and is a common electric appliance for low-temperature preservation of food or other objects in life, and is widely used in life and industry. With the increasingly better life of people, people have higher requirements for the storage function of the refrigerator, and there are also higher and higher storage requirements for milk powder, tea, and dry goods. Most of the refrigerators on the market have dry area drawers, which have functions such as treasures, mother and baby, 0°C fresh-keeping, and can meet daily use. The temperature of the dry area drawer is generally controlled between 0°C and 8°C, which can meet the short-term storage needs of baby milk powder, breast milk, and complementary food, and can also meet the storage of some dry goods. However, for tea and other objects that need to be stored for a long time and are frequently accessed, due to the difference between the temperature in the refrigerator and the temperature outside, and the high moisture content of the external air, the storage space is opened for too long, and dew and other conditions occur inside the storage, and the objects become dew and absorb water when taken out of the refrigerator environment due to their low temperature, which has a relatively large impact on storage.

[0003] In order to improve the dehumidification effect of the dry area storage space, a refrigeration equipment is provided in the related technology, which utilizes a separation structure to separate the first air supply air duct to form a dry air passage and a wet air passage, and utilizes a rotary dehumidification assembly to dehumidify the gas in the first air supply air duct. The dry air after dehumidification is sent into the dry area compartment through the dry air passage, so that the humidity of the incoming air of the dry area compartment does not affect the humidity of the dry area compartment, effectively avoiding the temperature fluctuation in the dry area compartment, thereby improving the storage capacity of the dry area compartment for objects.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related technology: Although the related technology realizes dehumidification through an additional rotary dehumidification assembly, the temperature control capability thereof depends on the temperature of the refrigeration compartment, the temperature control range is narrow, and it is difficult to realize wide-temperature-range control to solve the dew condensation problem of objects when they are taken out of the refrigerator.

[0005] It should be noted that the information disclosed in the above BACKGROUND section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0006] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor does it determine the key / important components or delineate the protection scope of these embodiments, but serves as a prelude to the detailed description below.

[0007] The embodiments of the present disclosure provide a refrigerator and a control method and device thereof, to achieve wide-temperature-range control of a variable-temperature chamber of the refrigerator.

[0008] In some embodiments, the refrigerator comprises a variable-temperature chamber, an air path system comprising a damper device and a condenser heat exchanger arranged beside a condenser, the air path system being in communication with the variable-temperature chamber to form an air circulation; the damper device is capable of switching between at least a first state and a second state; when the damper device is in the first state, the air path system forms a first air flow path, so that the air flow is guided to flow through the evaporator and then back to the variable-temperature chamber to cool the variable-temperature chamber; when the damper device is in the second state, the air path system forms a second air flow path, so that the air flow is guided to flow through the evaporator and then the condenser heat exchanger to heat the air flow, and then back to the variable-temperature chamber.

[0009] In this way, when the damper device is in the second state, the air flow is guided to flow through the evaporator to be cooled and dehumidified, then flow through the condenser heat exchanger to absorb the heat emitted by the condenser, so that the low-temperature and low-humidity air flow is heated to dry air at normal temperature, and then back to the variable-temperature chamber, and then the air returns to the evaporator to complete the dehumidification cycle, which not only supplies heat to the variable-temperature chamber, but also recovers part of the cold energy. By switching the damper device, the two air flow paths can be flexibly switched, and a wider temperature control range of the variable-temperature chamber can be achieved. Moreover, condensation and dampness caused by a large temperature difference between the variable-temperature chamber and the environment when the goods are frequently accessed can be avoided, and the goods in the variable-temperature chamber can be kept dry.

[0010] Optionally, the condenser heat exchanger adopts a wrapped wire tube structure, which is arranged around the outside of the condenser, and heat transfer is achieved by the adhesion of the wire tube and the condenser.

[0011] Optionally, the condenser heat exchanger adopts a multi-layer overlapping structure, which is adjacent to the condenser and arranged in layers, and the air flow flows through the interlayer channel to achieve heat exchange.

[0012] Optionally, the refrigerator further comprises a temperature detection device for detecting the actual temperature of the variable-temperature chamber; the damper device is configured to switch between the first state and the second state according to the set temperature of the variable-temperature chamber and the actual temperature monitored by the temperature detection device.

[0013] In some embodiments, the refrigerator comprises a damper device and a condenser heat exchanger arranged beside a condenser, the damper device being capable of guiding the air flow to form a first air flow path flowing through the evaporator and a second air flow path flowing through the evaporator and the condenser heat exchanger; the control method for the refrigerator comprises: obtaining a damper switching instruction, determining a set temperature and an actual temperature of a variable-temperature chamber; According to the set temperature and the actual temperature, the damper device is controlled to switch between the first state and the second state; wherein, in the case that the set temperature is less than the actual temperature, the damper device is controlled to operate in the first state to guide the airflow to form the first airflow path; in the case that the set temperature is greater than the actual temperature, the damper device is controlled to operate in the second state to guide the airflow to form the second airflow path.

[0014] Thus, in the case that the temperature needs to be lowered, the damper device operates in the first state, the airflow is transported to the temperature-variable room after being cooled by the evaporator according to the first airflow path, and then returns to the evaporator for circulation, so as to stabilize the temperature of the temperature-variable room in a narrow range of 0-10℃. At the same time, the moisture in the airflow is condensed into ice by the low temperature of the evaporator, the air moisture content is reduced, the temperature-variable room is preliminarily dehumidified, and the basic storage requirement of low-temperature drying can be met.

[0015] In the case that the temperature needs to be raised, the damper device operates in the second state, the airflow is transported to the temperature-variable room after being cooled by the evaporator according to the second airflow path, and then returns to the evaporator for circulation. The low-temperature dry air processed by the evaporator is heated to normal-temperature dry air by the heat of the condenser, which can avoid the risk of condensation caused by low temperature when flowing according to the first airflow path, and can also provide a normal-temperature dry storage environment of 20-32℃ for the temperature-variable room, so as to eliminate the temperature difference between the temperature of the goods and the temperature of the environment, and ensure the continuous drying of the goods even after multiple access.

[0016] In summary, the present scheme realizes wide-range temperature control of 0-32℃ through the switching of the damper device, which can cover the long-term low-temperature storage scenarios of tea and traditional Chinese medicinal materials, and the normal-temperature and frequent-access scenarios of dried fruits and milk powder cans, and meet the diversified storage requirements of users.

[0017] Optionally, the acquisition of the damper switching instruction comprises: detecting an opening door action; in the case that the opening door action is detected, if a closing door action is detected within a first set time length, or if the opening door duration exceeds a second set time length, the damper switching instruction is acquired; in the case that the opening door action is not detected, if the actual temperature of the temperature-variable room does not reach the set temperature, the damper switching instruction is acquired.

[0018] Optionally, in the case that the opening door action is not detected, the control method further comprises: if the actual temperature of the temperature-variable room reaches the set temperature, the interval time length between the current time and the last time when the compressor stops refrigeration is acquired; in the case that the interval time length exceeds a third set time length, the compressor is started, and the damper device is controlled to operate in the first state.

[0019] Optionally, after the control method controls the damper device to run in the first state, the control method further comprises: when the actual temperature of the variable-temperature chamber reaches the damper switching point, controlling the damper device to switch to the second state; when the actual temperature of the variable-temperature chamber reaches the damper switching point again, obtaining the cumulative running time of the damper; when the cumulative running time of the damper reaches the fourth set time length, controlling the damper device to run in the first state; and after the control stop condition is reached, closing the damper device.

[0020] Optionally, after the control method controls the damper device to switch between the first state and the second state, the control method for the refrigerator further comprises: in the case that the actual temperature of the variable-temperature chamber reaches the set temperature, resetting the cumulative running time of the damper; when the actual temperature of the variable-temperature chamber reaches the damper switching point, controlling the damper device to switch to another air flow path of the air path system; when the actual temperature of the variable-temperature chamber reaches the damper switching point again, obtaining the cumulative running time of the damper; when the cumulative running time of the damper reaches the fourth set time length, controlling the damper device to run in the first state; and after the control stop condition is reached, closing the damper device.

[0021] In some embodiments, the control device for the refrigerator comprises a processor and a memory storing program instructions, and the processor is configured to execute the control method for the refrigerator as described above when running the program instructions.

[0022] The refrigerator and the control method and the control device thereof provided by the embodiments of the present disclosure can achieve the following technical effects: By controlling the state of the damper device, the switching of the double air flow paths is realized. In the case that there is a need for cooling, the damper device runs in the first state, the air flow is transported to the variable-temperature space after being cooled by the evaporator according to the first air flow path, and then returns to the evaporator for circulation, which can stabilize the temperature of the variable-temperature chamber in a narrow range of 0-10℃. In the case that there is a need for heating, the damper device runs in the second state, the air flow is transported to the variable-temperature chamber after being cooled by the evaporator according to the second air flow path and then returns to the evaporator for circulation. The low-temperature dry air processed by the evaporator is heated to normal-temperature dry air by using the heat of the condenser, which can avoid the risk of condensation caused by low temperature when flowing according to the first air flow path, and can also provide a normal-temperature dry storage environment of 20-32℃ for the variable-temperature chamber, thereby ensuring the continuous drying of the goods. Under the cooperation of the double paths, the variable-temperature chamber can cover a wide temperature range of 0-32℃, breaking through the limitation of traditional narrow-range temperature control, and meeting the storage temperature requirements of different goods.

[0023] The general description above and the following description below are exemplary and explanatory only and are not intended to be limiting. BRIEF DESCRIPTION OF DRAWINGS

[0024] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is a schematic diagram of the air duct system of a refrigerator provided in an embodiment of this disclosure; Figure 1A This is a schematic diagram of a refrigerator's airflow system according to an embodiment of the present disclosure; Figure 1B This is a schematic diagram of another state of the air duct system of a refrigerator provided in an embodiment of this disclosure; Figure 2 This is a schematic flowchart of a control method for a refrigerator provided in an embodiment of this disclosure; Figure 3 This is a schematic flowchart of another control method for a refrigerator provided in an embodiment of this disclosure; Figure 4 This is a schematic flowchart of another control method for a refrigerator provided in an embodiment of this disclosure; Figure 5 This is a schematic flowchart of another control method for a refrigerator provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of a control device for a refrigerator provided in an embodiment of this disclosure. Detailed Implementation

[0025] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0026] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0027] Unless otherwise stated, the term "multiple" means two or more.

[0028] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0029] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0030] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0031] Figure 1 This is a schematic diagram of the air duct system of a refrigerator provided in an embodiment of this disclosure.

[0032] like Figure 1 As shown, the refrigerator includes: a variable temperature compartment 10; an air duct system 20; and an evaporator 30.

[0033] The airflow system 20 includes a damper device 21 and a condenser heat exchanger 22 located next to the condenser; the airflow system 20 is connected to the variable temperature chamber 10 to form an airflow circulation; the damper device 21 can switch between at least a first state and a second state.

[0034] Among them, when the damper device 21 is in the first state, such as Figure 1A As shown, the airflow system 20 forms a first airflow path, guiding the airflow through the evaporator 30 and back to the variable temperature chamber 10 to cool the variable temperature chamber 10. When the damper device 21 is in the second state, as... Figure 1B As shown, the airflow system 20 forms a second airflow path, which guides the airflow through the evaporator 30 and then through the condenser heat exchanger 22 to heat the airflow, and then it flows back to the variable temperature chamber 10.

[0035] Thus, when the damper device 21 is in its second state, the airflow is guided through the evaporator 30 for cooling and dehumidification, then flows through the condenser heat exchanger 22 to absorb the heat emitted by the condenser, heating the low-temperature, low-humidity airflow to room-temperature dry air, which then flows back to the variable-temperature chamber 10. The air then returns to the evaporator via the return air duct 23 to complete the dehumidification cycle. This both replenishes the heat supply to the variable-temperature chamber 10 and recovers some of the cooling energy. By switching the damper device 21, the two airflow paths can be flexibly switched, thereby achieving a wider temperature control range for the variable-temperature chamber 10. Furthermore, it avoids condensation and moisture buildup caused by excessive temperature differences between the chamber and the environment when items are frequently accessed, ensuring the items inside the variable-temperature chamber 10 remain dry.

[0036] Specifically, the embodiment of the present disclosure controls the air path system 20 to form two airflow paths with different functions by switching the air door device 21 between the first state and the second state. In addition, a condenser heat exchanger 22 is additionally arranged beside the condenser. Without making the airflow directly flow through the condenser cooling fins, the waste heat emitted by the condenser is safely and controllably captured through an independent heat exchange interface to heat the airflow, realizing the directional utilization of waste heat resources.

[0037] When the air door device 21 is in the first state, the air door device 21 guides the airflow to flow through the evaporator 30 and then back to the temperature-changing room 10. The airflow is directly cooled when passing through the evaporator 30, which has a low-temperature characteristic, and then is transported to the temperature-changing room 10, realizing a single cooling path and being able to adapt to low-temperature storage requirements.

[0038] When the air door device 21 is in the second state, the air door device 21 guides the airflow to flow through the evaporator 30 and then flow through the condenser heat exchanger 22 before flowing back to the temperature-changing room 10. The airflow first passes through the evaporator 30 to remove moisture, and then passes through the condenser heat exchanger 22 beside the condenser to absorb waste heat, without consuming energy, the low-temperature dry air can be heated to normal temperature or dry air with a temperature higher than the current temperature of the room. The essence is a warming and drying path, which adapts to normal-temperature storage requirements. It can not only avoid interfering with the cooling function of the first airflow path, but also fill the gap that the traditional scheme can only be low-temperature and cannot be normal-temperature drying. It solves the problem of narrow domain and realizes wide-area temperature regulation, meeting the diversified storage temperature requirements of users.

[0039] Optionally, the condenser heat exchanger 22 adopts a wrapped wire pipe structure, which is arranged outside the condenser in a ring shape. The heat transfer is realized by the adhesion of the wire pipe and the condenser.

[0040] Here, the wrapped wire pipe structure refers to a flexible or shaped tubular structure composed of a metal wire pipe, which can be a wire pipe made of copper, aluminum or other high-thermal-conductivity materials. The metal wire pipe is continuously wrapped along the length direction or the circumferential direction of the condenser to cover the main heat dissipation area of the condenser. By such a wrapping arrangement, the contact area between the wire pipe structure and the condenser is maximized. The wrapping design allows the wire pipe to fully contact each area of the outer wall of the condenser, avoiding the heat dissipation blind area caused by local contact and laying a foundation for subsequent efficient heat transfer. By utilizing the high thermal conductivity of the metal wire pipe, the waste heat of the condenser outer wall is quickly conducted to the inside of the wire pipe, and then heat exchanged with the airflow flowing through the wire pipe, which can improve the transmission efficiency of the condenser waste heat by 30%~50% compared with the structure with local adhesion or larger gap, ensuring that the low-temperature dry air flowing through the wire pipe can be quickly heated to normal temperature close to the ambient temperature, realizing wide-area temperature control.

[0041] In some embodiments, the condenser heat exchanger 22 adopts a multi-layered superimposed structure, which is arranged in a stacked manner adjacent to the condenser and through which the air flow passes through the interlayer channels to achieve heat exchange.

[0042] Here, the multi-layered superimposed structure is formed by stacking multiple metal sheets or plates with micro-channels, such as aluminum plates or copper plates. Through the multi-layered superimposed structure, the heat exchange area per unit volume can be significantly increased. In the same size space, the total heat exchange area of a 3-layer superimposed structure can be 2.5-3 times that of a single-layer structure, which provides the basis for efficient heat exchange. The entire multi-layered superimposed structure is arranged as a whole near the condenser. Further, the multi-layered superimposed structure and the condenser can form a parallel stacked relationship in space to shorten the distance between them and reduce the heat transfer loss in the air. The adjacent arrangement ensures that the waste heat of the condenser can be transferred to the condenser heat exchanger 22 in the shortest path, whether through thermal radiation, natural convection or through a heat-conducting medium. Between the stacked sheets, a gap of a certain size is reserved to form interlayer channels for the air flow to pass through. The air flow is forced to flow in these channels. In this way, when the high-temperature condenser transfers heat to the outer wall and sheets of the multi-layered superimposed structure, the sheets themselves become a secondary heat source. When the low-temperature dry air from the evaporator flows through the interlayer channels, it will have sufficient forced convection heat transfer with the upper and lower surfaces of the sheets, achieving efficient transfer of heat from the sheets to the air flow and ensuring that the flowing gas is heated to near ambient temperature, achieving wide-area temperature control.

[0043] Optionally, the refrigerator further comprises a temperature detection device for detecting the actual temperature of the variable-temperature compartment; the damper device 21 is configured to switch between the first state and the second state according to the set temperature of the variable-temperature compartment and the actual temperature monitored by the temperature detection device.

[0044] By comparing the actual temperature of the variable-temperature compartment detected by the temperature detection device with the set temperature, it is determined whether there is a need for temperature rise or fall, and the working state of the damper device 21 is switched.

[0045] Specifically, when the set temperature > actual temperature, the damper device 21 is controlled to switch to the second state to open the second air flow path to raise the temperature of the compartment by the normal-temperature dry air; When the set temperature < actual temperature, the damper device 21 is controlled to switch to the first state to open the first air flow path to lower the temperature of the compartment by the low-temperature dry air.

[0046] Thus, the temperature detection device monitors the temperature change of the chamber in real time. In the case of opening the door to cause the temperature to rise, or placing an object to cause the temperature to fluctuate, etc., the switching logic is automatically triggered. For example, after the user opens the door to take out the object, the actual temperature of the variable-temperature chamber 10 rises from 18°C to 22°C. After the temperature detection device detects that the actual temperature is greater than the set temperature, the first air flow path is switched to cool down until the temperature falls back to the set temperature. In this way, through the switching of the air door device 21, flexible switching of the two air flow paths is realized, and a wider temperature control range of the variable-temperature chamber 10 is realized. And it can avoid the condensation and damp caused by the too large temperature difference between the temperature and the environment when the object is frequently accessed, and ensure the continuous drying of the objects in the variable-temperature chamber.

[0047] Figure 2 is a flowchart of a control method for a refrigerator provided by the embodiments of the present disclosure, applied to a refrigerator with Figure 1 The refrigerator shown in the air path system.

[0048] The refrigerator includes an air door device and a condenser heat exchanger arranged beside the condenser. The air door device can guide the air flow to form a first air flow path flowing through the evaporator, and a second air flow path flowing through the evaporator and the condenser heat exchanger.

[0049] As Figure 2 shown, the control method includes: Step S201, obtaining an air door switching instruction, determining the set temperature and the actual temperature of the variable-temperature chamber.

[0050] Step S202, according to the set temperature and the actual temperature, controlling the air door device to switch between the first state and the second state; wherein, in the case that the set temperature is less than the actual temperature, controlling the air door device to run in the first state to guide the air flow to form the first air flow path; in the case that the set temperature is greater than the actual temperature, controlling the air door device to run in the second state to guide the air flow to form the second air flow path.

[0051] Thus, in the case of cooling demand, the air door device runs in the first state, the air flow follows the first air flow path, is cooled by the evaporator and then is transported to the variable-temperature space, and then returns to the evaporator for circulation, which can stabilize the temperature of the variable-temperature chamber in a narrow range of 0-10°C. At the same time, the low temperature of the evaporator causes the water in the air flow to condense into ice, reducing the water content in the air, realizing the preliminary dehumidification of the variable-temperature chamber, and meeting the basic storage demand of low-temperature drying.

[0052] In the presence of heating demand, the damper device operates in the second state, and the air flow follows the second air flow path, passes through the evaporator to be cooled, and then passes through the condenser heat exchanger to absorb heat, and then the normal temperature dry air is transported to the variable temperature room and returned to the evaporator for circulation. The low-temperature dry air treated by the evaporator is heated to normal temperature dry air by the heat of the condenser, which can avoid the risk of condensation caused by low temperature when flowing along the first air flow path, and can provide a normal temperature dry storage environment of 20-32℃ for the variable temperature room, which can eliminate the temperature difference between the temperature of the goods and the environment. Even if the goods are accessed several times, the goods can still be dried continuously.

[0053] In summary, the present application realizes wide-area temperature control of 0-32℃ through switching of the damper device, which can cover long-term low-temperature storage scenarios of tea and traditional Chinese medicinal materials, as well as normal-temperature and frequently-accessed scenarios of dried fruits and milk powder cans, and meets the diversified storage needs of users.

[0054] Here, the damper switching instruction refers to a damper control instruction issued in the presence of an opening and closing action, or when the room temperature does not reach the set temperature.

[0055] The acquisition of the damper switching instruction will be described below in conjunction with specific embodiments.

[0056] Figure 3 is a flowchart of another control method for a refrigerator provided by the present application, which is applied to a refrigerator with a variable temperature room and a wind path system as shown in the figure. Figure 1 The refrigerator shown in the figure.

[0057] As shown in Figure 3 , the control method comprises the following steps: Step S301, detecting the opening action.

[0058] Here, as a pre-step of scene recognition in the control process, the opening and closing states of the variable temperature room door are monitored in real time to distinguish between the opening dynamic scene and the closing stable scene. Generally, the opening action will cause the outside hot and humid air to enter the room, destroying the original low-temperature dry environment, and causing the cold to be quickly lost due to the sudden temperature rise; and the room environment is relatively stable after the door is closed. This step provides a basis for the subsequent adjustment of the temperature control logic of the wind path switching by identifying whether the door is opened.

[0059] Step S302, in the case of detecting the opening action, if the closing action is detected within the first set time, or if the opening duration is detected to exceed the second set time, the damper switching instruction is obtained.

[0060] If the door is closed shortly after being opened, a small amount of outside hot and humid air has entered, and the room environment needs to be restored by switching the damper to quickly eliminate the influence of short-term opening; If the door is opened for more than a set time, the chamber loses a large amount of cold, and hot and humid air continues to flow in, so that the temperature and humidity have deviated from the set values. At this time, the switching instruction is triggered to prevent the goods from being exposed to an unsuitable storage environment for a long time.

[0061] By setting the first set time and the second set time, the switching instruction of the air door is avoided from being triggered frequently. Optionally, the first set time is set to 30 seconds, and the second set time is set to 7 minutes.

[0062] In step S303, if the actual temperature of the temperature-variable chamber does not reach the set temperature without detecting the door opening action, the air door switching instruction is obtained.

[0063] In the door closing stable scenario, when the actual temperature of the chamber does not reach the set temperature, the air door switching instruction is obtained, and adjustment is triggered for the conventional temperature control requirement.

[0064] When the door is not opened, the chamber has no external interference, and the temperature fluctuation is only caused by the natural loss of system cold due to the heat dissipation of goods or the slow temperature rise after the compressor stops. At this time, the switching instruction is triggered, and the airflow path can be matched by the temperature rise and fall requirement to pull the temperature back to the set value to maintain the required stable storage environment.

[0065] In step S304, the set temperature and the actual temperature of the temperature-variable chamber are determined.

[0066] In step S305, the air door device is controlled to switch between the first state and the second state according to the set temperature and the actual temperature.

[0067] In step S306, if the actual temperature of the temperature-variable chamber reaches the set temperature without detecting the door opening action, the interval time between the current time and the last time when the compressor stops refrigeration is obtained.

[0068] Here, the temperature reaching the standard does not mean that the cold is sufficient. If the compressor stops for a short interval, it means that the system cold is still sufficient, and the chamber temperature will not fluctuate in the short term. If the interval is long, the cold may have been naturally lost, and there is a risk of slow temperature rise. In the door closing stable scenario, the interval time between the current time and the last time when the compressor stops refrigeration is obtained to provide a basis for whether to supplement the cold for the subsequent, so as to avoid the rebound of the environment caused by relaxing the monitoring after the temperature reaches the standard.

[0069] In step S307, if the interval time exceeds the third set time, the compressor is started, and the air door device is controlled to run in the first state.

[0070] The interval duration exceeding the third set duration indicates insufficient cold, the compressor is started, and the damper device is controlled to operate in the first state to guide the air flow to circulate along the first air flow path, so that the cold can be quickly supplemented, the temperature slowly rising is pulled back to the set temperature, and the evaporator is simultaneously dehumidified to prevent the humidity from rising due to the temperature rising. Through timely cold supplement, the temperature reaching the standard state can be prolonged, the frequency of triggering the subsequent step S303 is reduced, the system operation load is further reduced, and the overall reliability is improved.

[0071] Figure 4 is a flowchart of another control method for a refrigerator provided by the embodiment of the present disclosure, applied to a refrigerator having Figure 1 a wind path system as shown.

[0072] As shown in Figure 4 , the control method comprises: Step S401, obtaining a damper switching instruction, and determining a set temperature and an actual temperature of a variable-temperature chamber.

[0073] Step S402, controlling the damper device to switch between the first state and the second state according to the set temperature and the actual temperature.

[0074] Step S403, in the case where the damper switching instruction is not obtained, obtaining a current time and an interval duration of the last time when the compressor stops refrigeration.

[0075] Step S404, in the case where the interval duration exceeds a third set duration, starting the compressor and controlling the damper device to operate in the first state.

[0076] Step S405, when the actual temperature of the variable-temperature chamber reaches a damper switching-off point, controlling the damper device to switch to the second state.

[0077] Here, the damper device is in the first state, and when the variable-temperature chamber temperature drops to the lower limit of the damper switching-off point, it is switched to the second state to avoid excessive temperature drop. Here, the lower limit of the damper switching-off point is less than the set temperature.

[0078] When the damper device is in the first state, the air flow entering the variable-temperature chamber through the first air flow path is only cooled without temperature adjustment, and if it continues to operate, the temperature may drop below the set temperature, deviating from the user's demand. By setting the step of switching to the second state when the temperature reaches the lower limit of the switching-off point, the actual temperature of the chamber is pulled back to the set range by using the normal-temperature dry air flow of the second air flow path, the temperature is bidirectionally fine-tuned to drop and rise, the temperature fluctuation is controlled within the set temperature range, and the problem of excessive single cold supplement is avoided.

[0079] Step S406, when the actual temperature of the variable-temperature chamber reaches the damper switching-off point again, obtaining a damper cumulative operation duration.

[0080] After the damper device switches to the second state, the airflow heating causes the temperature to rise to the upper limit of the damper switching point, at which time the cumulative running time of the damper is triggered to be obtained. Here, the upper limit of the damper switching point is greater than the set temperature, and the cumulative running time of the damper is the sum of the first state running time and the second state running time.

[0081] Here, the cumulative running time of the damper is an indirect indicator of the sufficiency of dehumidification. The longer the running time, the more airflow flows through the evaporator, and the more complete the dehumidification. By accumulating the time, the situation of stopping adjustment when the temperature meets the standard but the dehumidification is insufficient can be avoided, and it is ensured that the damper has sufficient running time to complete multiple dehumidification adjustments, and the humidity in the intermediate chamber is reduced by flowing through the evaporator multiple times.

[0082] Step S407: In the case where the cumulative running time of the damper reaches the fourth set time, the damper device is controlled to run in the first state.

[0083] Through multiple switching between the first state and the second state, the actual temperature of the variable-temperature chamber may be slightly higher due to system cold loss. Switching back to the first state can further cool and pull the temperature back to the set temperature, avoid the situation that the temperature slowly rises due to too many cycles, and ensure that the final temperature is stable at the target value. At the same time, switching back to the first state still needs to flow through the evaporator, which can dehumidify the residual moisture in the chamber while locking the temperature, so as to stabilize the humidity and lay a low-humidity foundation for the closed environment after the damper is closed, and avoid the slow increase of humidity after the damper is closed due to the lack of airflow circulation.

[0084] Step S408: After the control stop condition is reached, the damper device is closed.

[0085] Here, the control stop condition is the pull-stop condition. It refers to a state where the air path has completed the adjustment task and does not need to continue temperature control and dehumidification. At this time, the damper device is closed, so that the active adjustment of the air path is transitioned to a stable standby state.

[0086] In this way, the disclosed embodiments achieve wide-area temperature control of 0-32°C through switching of the damper device, which can cover long-term low-temperature storage scenarios of tea, traditional Chinese medicinal materials, etc., and normal-temperature and frequently accessed scenarios of dried fruits, milk powder cans, etc., and meet the diversified storage needs of users.

[0087] Figure 5 is a flowchart of another control method for a refrigerator provided by the disclosed embodiments, which is applied to a refrigerator with Figure 1 a refrigerator with the air path system shown.

[0088] As shown in Figure 5 , the control method comprises the following steps: Step S501: Detect the door opening action.

[0089] Step S502, in the case of detecting the opening door action, if the closing door action is detected within the first set time length, or the opening door duration exceeds the second set time length, the air door switching instruction is obtained.

[0090] Step S503, in the case of not detecting the opening door action, if the actual temperature of the variable temperature room does not reach the set temperature, the air door switching instruction is obtained. Otherwise, go to step S507.

[0091] Step S504, determine the set temperature and the actual temperature of the variable temperature room.

[0092] Step S505, according to the set temperature and the actual temperature, control the air door device to switch between the first state and the second state.

[0093] Step S506, in the case that the actual temperature of the variable temperature room reaches the set temperature, clear the air door cumulative running time. Go to step S509.

[0094] Step S507, in the case of not detecting the opening door action, if the actual temperature of the variable temperature room reaches the set temperature, obtain the interval time length between the current time and the last time the compressor stops refrigeration.

[0095] Step S508, in the case that the interval time length exceeds the third set time length, start the compressor and control the air door device to run in the first state. Otherwise, return to step S507 to continue obtaining the interval time length.

[0096] Step S509, when the actual temperature of the variable temperature room reaches the air door switching point, control the air door device to switch to the other airflow path conduction of the air path system.

[0097] Step S510, when the actual temperature of the variable temperature room reaches the air door switching point again, obtain the air door cumulative running time.

[0098] Step S511, in the case that the air door cumulative running time reaches the fourth set time length, control the air door device to run in the first state. Otherwise, return to step S510.

[0099] Step S512, after reaching the control stop condition, turn off the air door device.

[0100] In this way, in the case of cooling demand, the air door device runs in the first state, the airflow follows the first airflow path, is cooled by the evaporator, and is then delivered to the variable temperature space, and then returns to the evaporator for circulation, which can stabilize the temperature of the variable temperature room in a narrow range of 0-10℃. At the same time, the low temperature of the evaporator causes the water in the airflow to condense into ice, reducing the water content in the air, achieving preliminary dehumidification of the variable temperature room, and meeting the basic storage requirements of low-temperature drying.

[0101] In the presence of heating demand, the damper device operates in the second state, and the airflow flows through the evaporator for cooling and then flows through the condenser heat exchanger to absorb heat, and then the normal temperature dry air is transported to the variable temperature room and then returned to the evaporator for circulation. The low-temperature dry air treated by the evaporator is heated to normal temperature dry air by the heat of the condenser, which can avoid the risk of condensation caused by low temperature when flowing along the first airflow path, and can provide a normal temperature dry storage environment of 20-32 DEG C for the variable temperature room, which can eliminate the temperature difference between the temperature of the goods and the environment temperature, and can ensure the continuous drying of the goods even after multiple access.

[0102] In summary, the present scheme realizes wide-area temperature control of 0-32 DEG C through switching of the damper device, which can cover long-term low-temperature storage scenarios of tea and traditional Chinese medicinal materials, and normal-temperature and frequent-access scenarios of dried fruits and milk powder cans, and meet the diversified storage needs of users.

[0103] Figure 6 is a schematic diagram of a control device for a refrigerator provided by an embodiment of the present disclosure.

[0104] As shown in Figure 6 , the control device for the refrigerator includes a processor 600 and a memory 601. Optionally, the device can also include a communication interface 602 and a bus 603. The processor 600, the communication interface 602, and the memory 601 can communicate with each other through the bus 603. The communication interface 602 can be used for information transmission. The processor 600 can call the logical instructions in the memory 601 to execute the control method for the refrigerator in the above-mentioned embodiments.

[0105] In addition, the logical instructions in the memory 601 described above can be implemented in the form of a software function unit and sold or used as an independent product, which can be stored in a computer-readable storage medium.

[0106] The memory 601, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, such as program instructions / modules corresponding to the method in the embodiments of the present disclosure. The processor 600 executes the function application and data processing by running the program instructions / modules stored in the memory 601, that is, realizes the control method for the refrigerator in the above-mentioned embodiments.

[0107] The memory 601 can include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required by a function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 601 can include a high-speed random access memory, and can also include a non-volatile memory.

[0108] The embodiments of the present disclosure also provide a refrigerator comprising the control device for a refrigerator described above. The control device for a refrigerator is installed on the refrigerator body. The installation relationship described herein is not limited to being placed inside the refrigerator body, but also includes installation connection with other components of the refrigerator, including but not limited to physical connection, electrical connection or signal transmission connection, etc. Those skilled in the art can understand that the control device for a refrigerator can be adapted to a feasible refrigerator body, thereby realizing other feasible embodiments.

[0109] The embodiments of the present disclosure provide a computer readable storage medium, which stores computer executable instructions configured to execute the control method for a refrigerator described above.

[0110] The technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, such as a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. various media that can store program codes.

[0111] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0112] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0113] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to apparatuses, devices, etc.), can be implemented in other manners. For example, the apparatus embodiments described above are merely schematic. For example, the division of the units is merely logical function division. There can be other division manners in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, apparatuses, or units, and can be in electrical, mechanical, or other forms. The units described as separated components can or can not be physically separated, and components displayed as units can or can not be physical units. Some or all of the units can be selected according to actual needs to achieve the embodiments.

[0114] The flowcharts and block diagrams in the drawings show the possible implementation architectures, functions, and operations of the systems, methods, and computer program products according to the embodiments of the present disclosure. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions noted in the blocks can occur in different orders than those noted in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the drawings, the operations or steps corresponding to different blocks can also occur in different orders than those disclosed in the descriptions, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in reverse order, depending on the functions involved. Each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A refrigerator characterized by comprising: The refrigerator comprises: a temperature-variable chamber; an air path system comprising a damper device and a condenser heat exchanger arranged beside the condenser; the air path system is in communication with the temperature-variable chamber to form an air flow circulation; the damper device is capable of switching between at least a first state and a second state; wherein, when the damper device is in the first state, the air path system forms a first air flow path, so that the air flow is guided to flow through the evaporator and then back to the temperature-variable chamber to cool the temperature-variable chamber; when the damper device is in the second state, the air path system forms a second air flow path, so that the air flow is guided to flow through the evaporator and then the condenser heat exchanger to heat the air flow, and then back to the temperature-variable chamber.

2. The refrigerator according to claim 1, characterized in that, The condenser heat exchanger adopts a wrapped wire tube structure, which is arranged outside the condenser and realizes heat transfer through the adhesion of the wire tube and the condenser.

3. The refrigerator according to claim 1, characterized in that, The condenser heat exchanger adopts a multi-layer overlapping structure, which is arranged adjacent to and in a stacked manner with the condenser, and the air flow flows through the interlayer channel to realize heat exchange.

4. The refrigerator according to claim 1, characterized in that, Further comprising: a temperature detection device for detecting the actual temperature of the temperature-variable chamber; the damper device is configured to switch between the first state and the second state according to the set temperature of the temperature-variable chamber and the actual temperature monitored by the temperature detection device.

5. A control method for a refrigerator, characterized by, The refrigerator comprises a damper device and a condenser heat exchanger arranged beside the condenser, the damper device is capable of guiding the air flow to form a first air flow path flowing through the evaporator and a second air flow path flowing through the evaporator and the condenser heat exchanger; the control method comprises: obtaining a damper switching instruction, determining the set temperature and the actual temperature of the temperature-variable chamber; controlling the damper device to switch between the first state and the second state according to the set temperature and the actual temperature; wherein, when the set temperature is less than the actual temperature, the damper device is controlled to operate in the first state to guide the air flow to form the first air flow path; when the set temperature is greater than the actual temperature, the damper device is controlled to operate in the second state to guide the air flow to form the second air flow path.

6. The control method according to claim 5, characterized by The obtaining of the damper switching instruction comprises: detecting an opening door action; if the closing door action is detected within a first set time length, or the opening door duration is detected to exceed a second set time length, the damper switching instruction is obtained when the opening door action is detected; if the actual temperature of the temperature-variable chamber does not reach the set temperature, the damper switching instruction is obtained when the opening door action is not detected.

7. The control method according to claim 6, characterized by When the opening door action is not detected, further comprising: if the actual temperature of the temperature-variable chamber reaches the set temperature, the interval time length between the current time and the last time when the compressor stops refrigeration is obtained; when the interval time length exceeds a third set time length, the compressor is started and the damper device is controlled to operate in the first state.

8. The control method according to claim 7, characterized by, After the damper device is controlled to operate in the first state, further comprising: when the actual temperature of the temperature-variable chamber reaches the damper switching point, the damper device is controlled to switch to the second state; when the actual temperature of the temperature-variable chamber reaches the damper switching point again, the cumulative running time length of the damper is obtained; In a case where the accumulated running time length of the damper reaches a fourth set time length, the damper device is controlled to run in the first state; After the control stop condition is reached, the damper device is closed.

9. The control method according to claim 5, characterized by, After the damper device is switched between the first state and the second state, further comprising: In a case where the actual temperature of the variable-temperature chamber reaches the set temperature, the accumulated running time length of the damper is cleared; When the actual temperature of the variable-temperature chamber reaches the damper switching point, the damper device is controlled to switch states to another air flow path of the air path system being conducted; In a case where the actual temperature of the variable-temperature chamber reaches the damper switching point again, the accumulated running time length of the damper is obtained; In a case where the accumulated running time length of the damper reaches a fourth set time length, the damper device is controlled to run in the first state; After the control stop condition is reached, the damper device is closed. 10.A control apparatus for a refrigerator, comprising a processor and a memory having stored program instructions, wherein, The processor is configured to execute, when running the program instructions, the control method for the refrigerator as claimed in any one of claims 5 to 9.

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