Self-adaptive anti-condensation control system based on rear-mounted anti-condensation pipe and refrigerator

Abstract

The invention provides a self-adaptive anti-condensation control system based on a rear-mounted anti-condensation pipe and a refrigerator. The self-adaptive anti-condensation control system comprises a compressor, a condenser, a filter, an electromagnetic valve, the anti-condensation pipe, a bypass pipe, a capillary pipe and an evaporator. The compressor, the condenser, the filter, the electromagnetic valve, the capillary tube and the evaporator are sequentially connected to form a refrigerating loop; the electromagnetic valve is provided with an inlet and two outlets; the inlet is connected with one end of the filter away from the condenser, the first outlet is connected with an inlet of the anti-condensation pipe, and the second outlet is connected with an inlet of the bypass pipe; an outlet of the anti-condensation pipe and an outlet of the by-pass pipe are connected with one end, far away from the evaporator, of the capillary pipe; the anti-condensation pipe is installed on the periphery of the freezing chamber and located at the rear end of the condenser in the refrigerant flowing direction. The flow path of the refrigerant is achieved through the electromagnetic valve, the opening and closing states of the two outlets of the electromagnetic valve are controlled according to the operation requirement of the refrigerator, and therefore the different flow directions of the refrigerant are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, and in particular to an adaptive anti-condensation control system and a refrigerator based on a post-positioned anti-condensation tube. Background Art

[0002] Condensation is a common phenomenon in refrigerators. This occurs when the refrigerator's internal temperature is significantly lower than the ambient temperature due to cooling. Frequent openings during use cause hot air to enter the refrigerator. This hot, humid air quickly cools to its dew point, liquefying and condensing on the refrigerator's inner walls. Condensation is particularly common in summer, during rainy seasons, and in areas with high relative humidity. Condensation can appear as mist, beads, or even streams, significantly impacting the user experience.

[0003] At present, the anti-condensation technologies adopted by most refrigerators on the market are mainly the following two: arranging electric heating wires in places prone to condensation, such as the middle beam, to increase the temperature at the false beam to prevent condensation; arranging de-condensation pipes to increase the temperature of the corresponding positions, and generally arranging de-condensation pipes around the inner tank to prevent condensation. In some existing technical solutions, anti-condensation design is performed at the contact points between the beam surface (including the vertical beam surface), the side panel surface and the freezer door seal of the refrigerator freezer compartment. The specific method is to design a groove structure around the freezer tank, and install the anti-condensation pipe of the high-pressure side pipeline of the refrigeration system in the groove, which is set under the beam surface and the side panel surface. In order to effectively prevent the steel anti-condensation pipe from rusting and leaking, the anti-condensation pipe is generally designed to be wrapped with a layer of heat shrink tubing on the outside to prevent water vapor from corroding the surface of the anti-condensation pipe.

[0004] However, the existing design of the refrigerator anti-condensation tube has many defects. On the one hand, the groove depth is greater than the outer diameter of the anti-condensation tube (generally 4mm in outer diameter), which results in the anti-condensation tube being unable to directly contact the beam surface and the side panel surface, resulting in poor heat transfer effect. Even if the anti-condensation tube is in contact with the beam surface and the side panel surface, it is only in linear contact, and the heat transfer effect is still not ideal. On the other hand, because the outside of the anti-condensation tube is wrapped with a layer of heat shrink tubing (the heat shrink tubing is generally made of non-metallic PE material), the thermal conductivity of the anti-condensation tube is blocked, resulting in the heat in the anti-condensation tube being unable to be transferred to the beam surface and the side panel surface in a timely and efficient manner. The above problems directly lead to the temperature in the anti-condensation tube being unable to be effectively transferred to the beam surface and the side panel surface that need to be heated, resulting in the condensation problem on the visible surface of the entire machine being difficult to be effectively solved under high temperature and high humidity conditions. Summary of the Invention

[0005] The present application provides an adaptive anti-condensation control system and a refrigerator based on a post-positioned anti-condensation tube, so as to solve the problem in the prior art that the temperature in the anti-condensation tube of the refrigerator cannot be effectively transferred to the beam surface and side panel surface that need to be heated, resulting in poor anti-condensation effect on the visible surface of the entire machine under high temperature and high humidity conditions.

[0006] In a first aspect, the present application provides an adaptive anti-condensation control system based on a后置 anti-condensation tube. The system includes a compressor, a condenser, a filter, a solenoid valve, an anti-condensation tube, a bypass tube, a capillary tube, and an evaporator. The compressor, condenser, filter, solenoid valve, capillary tube, and evaporator are connected in sequence to form a refrigeration circuit. The solenoid valve has one inlet and two outlets, and the outlets include a first outlet and a second outlet. The inlet is connected to one end of the filter away from the condenser, the first outlet is connected to the inlet of the anti-condensation tube, and the second outlet is connected to the inlet of the bypass tube. The outlets of the anti-condensation tube and the bypass tube are both connected to one end of the capillary tube away from the evaporator. The anti-condensation tube is installed around the freezer compartment and is located at the rear end of the condenser in the refrigerant flow direction.

[0007] The present application uses a solenoid valve to achieve the flow path of the refrigerant. According to the needs of the refrigerator operation, the opening and closing states of the two outlets of the solenoid valve are controlled, so as to achieve different refrigerant flow directions. According to the ambient humidity, the refrigerant flow direction is determined. Under low humidity conditions, energy-saving operation is achieved. When the refrigerant does not flow into the anti-condensation tube, the heat load of heat leakage into the box body is reduced, thereby achieving the purpose of energy-saving operation of the refrigerator.

[0008] In some possible implementation manners, the system further includes a main control board. A control module and an ambient humidity sensor are integrated on the main control board. The control module is electrically connected to the solenoid valve, the compressor, and the temperature control unit of the refrigerator compartment respectively, and is used to control the opening and closing states of the outlets of the solenoid valve, the rotation speed of the compressor, and the compartment temperature according to the ambient humidity signal collected by the ambient humidity sensor.

[0009] In some possible implementation manners, the control module is configured to:

[0010] Obtain the ambient humidity RH;

[0011] According to the numerical range of the ambient humidity RH, control the opening and closing states of the outlets of the solenoid valve;

[0012] When RH ≤ 45%, control the first outlet of the solenoid valve to open and the second outlet to close, and the refrigerant flows into the capillary tube through the bypass tube;

[0013] When 45% < RH ≤ 80%, control the first outlet of the solenoid valve to close and the second outlet to open, and the refrigerant flows into the capillary tube through the anti-condensation tube;

[0014] When RH > 80%, control the first outlet of the solenoid valve to close and the second outlet to open, and at the same time adjust the rotation speed of the compressor and the compartment temperature to the preset strong mode parameters.

[0015] In some possible implementation manners, the control module is configured to:

[0016] When RH ≤ 45%, the compressor operates at the user - preset speed, and the compartment temperature remains at the user - set value.

[0017] In some possible implementation manners, the control module is configured to:

[0018] When 45% < RH ≤ 75%, the compressor operates at the speed according to the preset energy - consumption program, where the speed at an ambient temperature of 32°C is 1800 ± 300 revolutions per minute, and the speed at an ambient temperature of 16°C is 1200 ± 150 revolutions per minute.

[0019] In some possible implementation manners, the control module is configured to:

[0020] When RH > 80%, the speed of the compressor is adjusted to 960 - 1200 revolutions per minute; the refrigerating set temperature is quantified to 4°C, and the freezing set temperature is quantified to - 18°C.

[0021] In some possible implementation manners, the control module is configured to:

[0022] When the ambient humidity is in the range of 45% < RH ≤ 80%, if the ambient temperature is higher than the preset temperature threshold, the control module increases the speed of the compressor by 5% - 10% compared with the normal speed in this range; if the ambient temperature is lower than the preset temperature threshold, the control module decreases the speed of the compressor by 5% - 10% compared with the normal speed in this range.

[0023] In some possible implementation manners, the ambient humidity sensor collects the ambient humidity signal every 3 - 10 minutes.

[0024] In some possible implementation manners, the control module is configured to:

[0025] When 45% < RH ≤ 80% and the continuous closing time of the refrigerator door exceeds the preset duration, the control module reduces the speed of the compressor to 80% - 90% of the normal speed and extends the collection interval of the ambient humidity sensor to 15 - 20 minutes; when it is detected that the refrigerator door is opened or the fluctuation range of the ambient humidity exceeds ±5%, it resumes to the original speed and collection interval.

[0026] In a second aspect, the present application provides a refrigerator, and the refrigerator includes the refrigerator anti - condensation system described in the first aspect.

[0027] As can be seen from the above, the present application provides an adaptive anti-condensation control system and refrigerator based on a rear-placed anti-condensation tube. The system includes a compressor, a condenser, a filter, a solenoid valve, an anti-condensation tube, a bypass tube, a capillary tube, and an evaporator. The compressor, condenser, filter, solenoid valve, capillary tube, and evaporator are sequentially connected to form a refrigeration circuit. The solenoid valve has an inlet and two outlets. The inlet is connected to the end of the filter away from the condenser, the first outlet is connected to the inlet of the anti-condensation tube, and the second outlet is connected to the inlet of the bypass tube. The outlets of the anti-condensation tube and the bypass tube are both connected to the end of the capillary tube away from the evaporator. The anti-condensation tube is installed around the freezer compartment and is located at the rear end of the condenser in the refrigerant flow direction. The present application uses a solenoid valve to realize the flow path of the refrigerant. According to the needs of the refrigerator operation, the opening and closing states of the two outlets of the solenoid valve are controlled to achieve different flow directions of the refrigerant. The flow direction of the refrigerant is determined according to the ambient humidity. Energy-saving operation is achieved under low humidity conditions. If the refrigerant does not flow into the anti-condensation tube, the heat load of heat leakage into the cabinet is reduced, thereby achieving the purpose of energy-saving operation of the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 This is a schematic diagram of the structure of the adaptive anti-condensation control system based on the post-positioned anti-condensation tube provided in this application.

[0030] Illustration:

[0031] 11-compressor, 21-condenser, 31-anti-condensation tube, 41-filter, 51-solenoid valve, 61-capillary tube, 71-evaporator, 511-first outlet; 512-second outlet. DETAILED DESCRIPTION

[0032] The following embodiments are described in detail, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numbers in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following embodiments are not intended to represent all possible implementations consistent with the present application. They are merely examples of systems and methods consistent with certain aspects of the present application, as detailed in the claims.

[0033] Condensation is a common phenomenon in refrigerators. This occurs when the refrigerator's internal temperature is significantly lower than the ambient temperature due to cooling. Frequent openings during use cause hot air to enter the refrigerator. This hot, humid air quickly cools to its dew point, liquefying and condensing on the refrigerator's inner walls. Condensation is particularly common in summer, during rainy seasons, and in areas with high relative humidity. Condensation can appear as mist, beads, or even streams, significantly impacting the user experience.

[0034] At present, the anti-condensation technologies adopted by most refrigerators on the market are mainly the following two: arranging electric heating wires in places prone to condensation, such as the middle beam, to increase the temperature at the false beam to prevent condensation; arranging de-condensation pipes to increase the temperature of the corresponding positions, and generally arranging de-condensation pipes around the inner tank to prevent condensation. In some existing technical solutions, anti-condensation design is performed at the contact points between the beam surface (including the vertical beam surface), the side panel surface and the freezer door seal of the refrigerator freezer compartment. The specific method is to design a groove structure around the freezer tank, and install the anti-condensation pipe of the high-pressure side pipeline of the refrigeration system in the groove, which is set under the beam surface and the side panel surface. In order to effectively prevent the steel anti-condensation pipe from rusting and leaking, the anti-condensation pipe is generally designed to be wrapped with a layer of heat shrink tubing on the outside to prevent water vapor from corroding the surface of the anti-condensation pipe.

[0035] However, the existing design of the refrigerator anti-condensation tube has many defects. On the one hand, the groove depth is greater than the outer diameter of the anti-condensation tube (generally 4mm in outer diameter), which results in the anti-condensation tube being unable to directly contact the beam surface and the side panel surface, resulting in poor heat transfer effect. Even if the anti-condensation tube is in contact with the beam surface and the side panel surface, it is only in linear contact, and the heat transfer effect is still not ideal. On the other hand, because the outside of the anti-condensation tube is wrapped with a layer of heat shrink tubing (the heat shrink tubing is generally made of non-metallic PE material), the thermal conductivity of the anti-condensation tube is blocked, resulting in the heat in the anti-condensation tube being unable to be transferred to the beam surface and the side panel surface in a timely and efficient manner. The above problems directly lead to the temperature in the anti-condensation tube being unable to be effectively transferred to the beam surface and the side panel surface that need to be heated, resulting in the condensation problem on the visible surface of the entire machine being difficult to be effectively solved under high temperature and high humidity conditions.

[0036] Based on this, Figure 1As shown, the present application provides an adaptive anti-condensation control system based on the rear-placement of the anti-condensation tube, the system comprising a compressor, a condenser, a filter, a solenoid valve, an anti-condensation tube, a bypass tube, a capillary tube and an evaporator; the compressor, condenser, filter, solenoid valve, capillary tube and evaporator are connected in sequence to form a refrigeration circuit; the solenoid valve has an inlet and two outlets, the outlets comprising a first outlet and a second outlet; the inlet is connected to an end of the filter away from the condenser, the first outlet is connected to the inlet of the anti-condensation tube, and the second outlet is connected to the inlet of the bypass tube; the outlet of the anti-condensation tube and the outlet of the bypass tube are both connected to an end of the capillary tube away from the evaporator; the anti-condensation tube is installed around the freezer compartment and is located at the rear end of the condenser in the refrigerant flow direction.

[0037] The refrigerator refrigeration system consists of components such as a compressor, a condenser, a filter, a solenoid valve, an anti-condensation tube, a capillary tube and an evaporator; the condenser and the anti-condensation tube are connected to form the refrigerator heat dissipation system; the anti-condensation tube is installed around the freezer compartment and is located at the rear end of the condenser in the refrigerant flow direction; the solenoid valve is installed between the condenser and the anti-condensation tube. In order to prevent impurities from entering the solenoid valve and causing failure, the filter that is traditionally located before the capillary tube is advanced to the rear end of the condenser before the solenoid valve inlet; the first outlet of the solenoid valve is connected to the anti-condensation tube, and the second outlet is connected to the bypass tube; a three-way tube is added in front of the capillary tube, and the refrigerant flowing through the anti-condensation tube or the bypass tube can be connected to the capillary tube and enter the evaporator after cooling and throttling; the solenoid valve can be an electric rotary valve or a bistable solenoid valve, which has the common characteristics of one inlet and two outlets. The solenoid valve can select the outlet through which the refrigerant flows according to needs.

[0038] In summary, with the rear-placed anti-condensation tube design, the refrigerant flow direction is:

[0039] Flow path: compressor → condenser → filter → solenoid valve → anti-condensation tube → capillary tube (16) → evaporator;

[0040] or: Flow path: compressor → condenser → filter → solenoid valve → bypass pipe → capillary tube (16) → evaporator.

[0041] In some embodiments, the system further includes a main control board; a control module and an ambient humidity sensor are integrated on the main control board; the control module is electrically connected to the solenoid valve, the compressor, and the temperature control unit of the refrigerator compartment, respectively, and is used to control the outlet opening and closing state of the solenoid valve, the speed of the compressor, and the compartment temperature based on the ambient humidity signal collected by the ambient humidity sensor.

[0042] The control module in this application is equipped with an environmental humidity sensor. After the environmental humidity signal collected by the sensor is processed by the built-in adaptive program of the refrigerator control board, according to the needs of the refrigerator operation, the opening and closing states of the two outlets of the solenoid valve are controlled, so as to realize different flows of the refrigerant; further, the compressor speed and the compartment temperature can also be adjusted according to the environmental humidity situation to achieve the effect of improving anti-condensation.

[0043] In some embodiments, the control module is configured to:

[0044] Obtain the environmental humidity RH;

[0045] According to the numerical range of the environmental humidity RH, control the opening and closing states of the outlets of the solenoid valve;

[0046] When RH ≤ 45%, control the first outlet of the solenoid valve to open and the second outlet to close, and the refrigerant flows into the capillary through the bypass pipe;

[0047] When 45% < RH ≤ 80%, control the first outlet of the solenoid valve to close and the second outlet to open, and the refrigerant flows into the capillary through the anti-condensation pipe;

[0048] When RH > 80%, control the first outlet of the solenoid valve to close and the second outlet to open, and at the same time adjust the compressor speed and the compartment temperature to the preset strong mode parameters.

[0049] The above control system is disclosed. In a high humidity environment (RH > 80%), by opening the anti-condensation pipe and adjusting the compressor speed and the compartment temperature to the strong mode, the heat dissipation capacity of the anti-condensation pipe can be strengthened, and the condensation phenomenon at easily condensable parts such as the door seal can be effectively inhibited, avoiding user use troubles caused by condensation (such as door seal adhesion, box body dampness, etc.).

[0050] In a medium humidity environment (45% < RH ≤ 80%), only by running the anti-condensation pipe can meet the basic anti-condensation requirements and balance the anti-condensation effect and energy consumption.

[0051] In a low humidity environment (RH ≤ 45%), close the anti-condensation pipe passage, make the refrigerant directly enter the capillary through the bypass pipe, avoid the anti-condensation pipe leaking heat to the compartment, reduce the additional heat load of the refrigerator, and thus reduce energy consumption.

[0052] This application's differential control for different humidity ranges avoids the energy waste caused by the continuous operation of traditional anti-condensation tubes. On the premise of ensuring the anti-condensation effect, it can reduce the refrigerator's energy consumption by 2% - 5%. By precisely controlling the refrigerant flow through the solenoid valve, unnecessary heat exchange is reduced, and the operating load of the compressor is lowered. Especially in a low-humidity environment, it avoids the loss caused by the continuous high-load operation of the compressor. Adjusting the compressor speed and the compartment temperature in combination with the ambient humidity makes the refrigeration system operate more in line with the actual environmental needs, reduces the impact of temperature fluctuations on system components, and improves the overall reliability and service life of the refrigerator.

[0053] In some embodiments, the control module is configured to:

[0054] When RH ≤ 45%, the compressor operates at the user-preset speed, and the compartment temperature remains at the user-set value.

[0055] In a low-humidity environment, the risk of door seal condensation is extremely low, and at this time, there is no need to rely on the anti-condensation tube for heat dissipation. The compressor operates at the user-preset speed, which not only avoids the energy consumption waste caused by increasing the speed for excessive anti-condensation but also can stably maintain the user-set compartment temperature, ensuring that the refrigeration / freezing effect meets the user's daily use requirements and achieving the balance between energy conservation and refrigeration effect. Keeping the compartment temperature at the user-set value can avoid the storage environment fluctuations caused by the system automatically adjusting the temperature, ensuring that the ingredients (such as fruits, vegetables, meats, etc.) are in the fresh-keeping state expected by the user. At the same time, the compressor operating at the preset speed can reduce unnecessary speed changes, lower the operating noise, and improve the user's comfort level.

[0056] In some embodiments, the control module is configured to:

[0057] When 45% < RH ≤ 75%, the compressor operates at the speed of the preset energy consumption program, where the speed is 1800 ± 300 revolutions at an ambient temperature of 32°C and the speed is 1200 ± 150 revolutions at an ambient temperature of 16°C.

[0058] Within the above-set humidity range, there is a certain risk of door seal condensation (the refrigerant flow through the anti-condensation tube needs to be controlled by the solenoid valve), but the risk level is medium. The compressor operates at the speed of the preset energy consumption program at a specific ambient temperature, which can not only stably dissipate heat through the anti-condensation tube to inhibit condensation but also avoid the sharp increase in energy consumption caused by blindly increasing the speed. For example, a relatively high reference speed (1800 ± 300 revolutions) is adopted in a high-temperature environment of 32°C to ensure the heat dissipation efficiency of the anti-condensation tube to cope with the potential condensation risk brought by the high ambient temperature; a lower reference speed (1200 ± 150 revolutions) is adopted in a medium-temperature environment of 16°C to reduce energy consumption while meeting the basic anti-condensation requirements, achieving the precise balance between energy consumption and anti-condensation effect at different ambient temperatures.

[0059] The setting of a fixed rotational speed range reduces the load fluctuations of the compressor caused by frequent speed adjustments, and reduces mechanical losses and operating noise. At the same time, combined with the stable heat dissipation of the anti-condensation pipe, the refrigerator maintains a stable temperature field in a medium humidity environment, avoiding the temperature fluctuations in the compartments caused by frequent speed changes, and ensuring the fresh-keeping effect of the food materials and the service life of the system.

[0060] In some embodiments, the control module is configured to:

[0061] When RH > 80%, the rotational speed of the compressor is adjusted to 960 - 1200 revolutions; the refrigerating set temperature is quantified as 4°C, and the freezing set temperature is quantified as -18°C.

[0062] In a high humidity environment, the risk of door seal condensation is significantly increased. At this time, the compressor maintains a stable rotational speed of 960 - 1200 revolutions, which can ensure that the anti-condensation pipe continuously obtains sufficient heat (the heat dissipation is stable when the refrigerant flows through the anti-condensation pipe), and the temperature of the door frame and door seal area is increased through the continuous heat dissipation of the anti-condensation pipe, effectively suppressing water vapor condensation. At the same time, the settings of 4°C for refrigeration and -18°C for freezing provide a relatively stable low temperature environment for the compartments, reducing the temperature difference fluctuations between the inside of the box and the external environment, and indirectly reducing the probability of condensation formation, providing double protection for the anti-condensation effect in a high humidity environment.

[0063] The rotational speed of the compressor is controlled in the medium and low range of 960 - 1200 revolutions, which not only avoids the problem of insufficient heat in the anti-condensation pipe at low rotational speeds, but also prevents the system load from being too high and the energy consumption from surging at high rotational speeds. At the same time, the compartment temperature is set quantitatively (4°C for refrigeration and -18°C for freezing), which simplifies the temperature adjustment logic, reduces the system fluctuations caused by frequent temperature adjustments, reduces the operating losses of components such as the compressor and solenoid valve, and extends the service life of the equipment.

[0064] In a high humidity environment, a stable compartment temperature (4°C for refrigeration and -18°C for freezing) can ensure that the food materials are in a suitable fresh-keeping state, avoiding the deterioration of the food materials caused by temperature fluctuations. At the same time, the effective suppression of door seal condensation can prevent problems such as door seal adhesion and box body dampness, improving the user's convenience and satisfaction, especially suitable for extreme environments such as the rainy season and high humidity areas in the south.

[0065] In some embodiments, the control module is configured to:

[0066] When the environmental humidity is in the range of 45% < RH ≤ 80%, if the environmental temperature is higher than the preset temperature threshold, the rotational speed of the compressor is controlled to increase by 5% - 10% compared with the conventional rotational speed in this range; if the environmental temperature is lower than the preset temperature threshold, the rotational speed of the compressor is controlled to decrease by 5% - 10% compared with the conventional rotational speed in this range.

[0067] When the ambient temperature is higher than the preset threshold, the ability of air to hold water vapor increases, and the temperature difference between the door seal area and the outside world leads to an increased possibility of condensation. At this time, increasing the compressor speed can increase the refrigerant flow rate and heat dissipation efficiency in the anti-condensation tube, raise the temperature of the door seal area to enhance the anti-condensation effect; when the ambient temperature is lower than the preset threshold, the water vapor saturation of the air is relatively low, and the condensation risk is relatively reduced. Reducing the compressor speed can reduce unnecessary heat dissipation in the anti-condensation tube, avoid energy waste on the premise of meeting the basic anti-condensation requirements, and achieve precise adaptation of the anti-condensation effect to environmental conditions.

[0068] By dynamically adjusting the speed according to the ambient temperature, the "overprotection" problem that may occur with a fixed speed in this humidity range is avoided: moderately increasing the speed at high temperatures ensures that anti-condensation does not fail, and actively reducing the speed at low temperatures reduces ineffective energy consumption. Compared with fixed speed control, it can further reduce the operating energy consumption of the refrigerator while ensuring the reliability of anti-condensation, making the system operation more in line with the energy requirements in the actual environment.

[0069] Through refined speed adjustment based on the ambient temperature, the change in the compressor speed is more in line with the actual working condition requirements, avoiding sudden rises and falls in the system load caused by maintaining a fixed speed due to ambient temperature fluctuations. This smooth dynamic adjustment can reduce the mechanical losses of core components such as the compressor, reduce operating noise, improve the stability and service life of the refrigeration system, and at the same time ensure the relative stability of the compartment temperature and guarantee the storage effect of food ingredients.

[0070] In some embodiments, the ambient humidity sensor collects ambient humidity signals every 3 - 10 minutes.

[0071] In some embodiments, the control module is configured to:

[0072] When 45% < RH ≤ 80% and the refrigerator door is continuously closed for more than the preset duration, the control module reduces the compressor speed to 80% - 90% of the normal speed and extends the acquisition interval of the ambient humidity sensor to 15 - 20 minutes; when it is detected that the refrigerator door is opened or the ambient humidity fluctuation amplitude exceeds ±5%, it returns to the original speed and acquisition interval.

[0073] When the refrigerator door is continuously closed, the loss of cold air inside the box is small, and the heat dissipation of the food ingredients is stable. At this time, it is not necessary to maintain the normal speed to meet the refrigeration requirements. Reducing the compressor speed can reduce the refrigerant circulation volume and the heat dissipation redundancy of the anti-condensation tube, reduce unnecessary energy consumption on the premise of ensuring the anti-condensation effect (the anti-condensation tube is still in working condition) and the stability of the compartment temperature; extending the acquisition interval of the humidity sensor reduces the operation load of the control module and further optimizes the energy consumption, especially suitable for scenarios such as at night or when the refrigerator is not opened for a long time.

[0074] When the refrigerator door is opened, hot and humid air from outside enters the refrigerator, instantly increasing the cooling load. Restoring the original speed can quickly compensate for the cooling loss and prevent excessive temperature fluctuations in the compartment. When the ambient humidity fluctuates by more than ±5%, restoring the original collection interval can promptly capture the humidity change, ensuring that the control module adjusts its operating status according to the latest environmental parameters, avoiding anti-condensation failure caused by sudden humidity changes. This makes the system operation more suitable for actual use scenarios and reduces the impact of temperature fluctuations on food preservation.

[0075] In some embodiments, the present application provides a refrigerator comprising the refrigerator anti-condensation system described in the first aspect.

[0076] This application adds a solenoid valve to the refrigeration system and uses an ambient humidity sensor to detect and determine ambient humidity, enabling the selection of different refrigerant flow directions through the solenoid valve. Combined with compressor speed and compartment temperature control, this reduces energy consumption and improves anti-condensation effectiveness. By operating in energy-saving mode in low-humidity environments, the refrigerant bypasses the anti-condensation tube, reducing heat leakage into the compartment. This reduces refrigerator energy consumption by 2% to 5% compared to traditional solutions, resulting in a simple and reliable refrigeration system. Furthermore, it suppresses condensation on the door seal in high-humidity environments, optimizing and improving the refrigerator's anti-condensation effectiveness in high-humidity environments.

[0077] Example

[0078] like Figure 1 As shown, this embodiment provides a refrigerator anti-condensation system consisting of a compressor 11, a condenser 21, a filter 41, an anti-condensation pipe 31, a filter 41, a solenoid valve 51, a capillary tube 61, an evaporator 71 and a bypass pipe 81;

[0079] The inlet of the solenoid valve 51 is connected to the outlet of the condenser 21;

[0080] The first outlet 511 of the solenoid valve is connected to the bypass pipe 5112 , and the second outlet 512 is connected to the inlet of the anti-condensation pipe 31 ;

[0081] The solenoid valve 51 can be an electric rotary valve or a bistable solenoid valve, which has the common characteristics of one inlet and two outlets. The solenoid valve can select the outlet through which the refrigerant flows according to needs;

[0082] In addition, in order to control the refrigeration operation of the refrigerator, the refrigerator of this embodiment adopts a variable frequency compressor and a main control board for controlling the operation of the refrigerator compressor, solenoid valve and other components;

[0083] The main control board is equipped with a control module that dynamically controls the compressor, compartment temperature, and the opening and closing of each outlet of the solenoid valve based on environmental parameters;

[0084] An ambient humidity sensor is installed in the control module. The ambient humidity signal collected by the sensor is processed by the built-in adaptive program of the refrigerator control board. The opening and closing states of the two outlets of the solenoid valve are controlled according to the needs of refrigerator operation, thereby achieving different refrigerant flows. Furthermore, the compressor speed and compartment temperature can also be adjusted according to the ambient humidity to achieve an improved anti-condensation effect. The specific control mode is shown in Table 1.

[0085] Table 1

[0086]

[0087]

[0088] In this embodiment, the speed of the variable frequency compressor is based on 1800±N1 rpm (N1 is recommended to be 300) / 16°C ambient temperature conditions, and the speed of the variable frequency compressor is based on 1200±N2 rpm (N2 is recommended to be 150);

[0089] When the ambient humidity is RH>80%, the refrigerator will enter the high-efficiency mode, reducing the compressor speed to the lowest achievable speed (960-1200 rpm is recommended). If the refrigerator setting temperature is ≤4°C, the refrigerator setting level is set to 4; the refrigerator compartment setting level remains unchanged; if the freezer setting temperature is ≤-18°C or "Quick Freeze" is set, the freezer setting level is set to -18°C.

[0090] The collection of ambient humidity can be preset as needed. The control module can collect humidity once every T minutes, and T is usually set to 3 to 10 minutes.

[0091] This application utilizes a solenoid valve to control the refrigerant flow path. The two outlets of the solenoid valve are controlled to open and close according to the refrigerator's operating requirements, thereby achieving different refrigerant flow directions. The refrigerant flow direction is determined based on ambient humidity, achieving energy-saving operation in low-humidity conditions. Refrigerant does not flow into the anti-condensation tube, reducing the heat load from heat leakage into the refrigerator, thereby achieving energy-saving operation of the refrigerator.

[0092] As can be seen from the above embodiments, the present application provides an adaptive anti-condensation control system and refrigerator based on a post-positioned anti-condensation tube. The system includes a compressor, a condenser, a filter, a solenoid valve, an anti-condensation tube, a bypass tube, a capillary tube, and an evaporator. The compressor, condenser, filter, solenoid valve, capillary tube, and evaporator are sequentially connected to form a refrigeration circuit. The solenoid valve has one inlet and two outlets. The inlet is connected to the end of the filter away from the condenser, the first outlet is connected to the inlet of the anti-condensation tube, and the second outlet is connected to the inlet of the bypass tube. The outlets of the anti-condensation tube and the bypass tube are both connected to the end of the capillary tube away from the evaporator. The anti-condensation tube is installed around the freezer compartment and is located at the rear end of the condenser in the refrigerant flow direction. The present application uses a solenoid valve to control the refrigerant flow path. The opening and closing states of the two outlets of the solenoid valve are controlled according to the operating needs of the refrigerator, thereby achieving different refrigerant flow directions. The refrigerant flow direction is determined according to the ambient humidity. Energy-saving operation is achieved under low humidity conditions. If the refrigerant does not flow into the anti-condensation tube, the heat load caused by heat leakage into the refrigerator is reduced, thereby achieving the purpose of energy-saving operation of the refrigerator.

[0093] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without expending creative work shall fall within the scope of protection of this application.

Claims

1. An adaptive anti-condensation control system based on a post-positioned anti-condensation tube, characterized in that: The system includes a compressor, a condenser, a filter, a solenoid valve, an anti-condensation pipe, a bypass pipe, a capillary tube and an evaporator; the compressor, the condenser, the filter, the solenoid valve, the capillary tube and the evaporator are connected in sequence to form a refrigeration circuit; the solenoid valve has an inlet and two outlets, and the outlets include a first outlet and a second outlet; the inlet is connected to one end of the filter away from the condenser, the first outlet is connected to the inlet of the anti-condensation pipe, and the second outlet is connected to the inlet of the bypass pipe; the outlets of the anti-condensation pipe and the bypass pipe are both connected to one end of the capillary tube away from the evaporator; the anti-condensation pipe is installed around the freezing compartment and is located at the rear end of the condenser in the refrigerant flow direction.

2. The adaptive anti-condensation control system based on the post-positioned anti-condensation tube according to claim 1 is characterized in that: The system further includes a main control board; a control module and an environmental humidity sensor are integrated on the main control board; the control module is electrically connected to the solenoid valve, the compressor and the temperature control unit of the refrigerator compartment respectively, and is used to control the opening and closing state of the outlet of the solenoid valve, the rotation speed of the compressor and the compartment temperature according to the environmental humidity signal collected by the environmental humidity sensor.

3. The adaptive anti-condensation control system based on the post-positioned anti-condensation tube according to claim 2 is characterized in that: The control module is configured as follows: Obtain the environmental humidity RH; Control the opening and closing state of the outlet of the solenoid valve according to the numerical range of the environmental humidity RH; When RH ≤ 45%, control the first outlet of the solenoid valve to open and the second outlet to close, and the refrigerant flows into the capillary tube through the bypass pipe; When 45% < RH ≤ 80%, control the first outlet of the solenoid valve to close and the second outlet to open, and the refrigerant flows into the capillary tube through the anti-condensation pipe; When RH > 80%, control the first outlet of the solenoid valve to close and the second outlet to open, and at the same time adjust the rotation speed of the compressor and the compartment temperature to the preset strong mode parameters.

4. The adaptive anti-condensation control system based on the post-positioned anti-condensation tube according to claim 3 is characterized in that: The control module is configured as follows: When RH ≤ 45%, the compressor operates at the rotation speed preset by the user, and the compartment temperature remains at the value set by the user.

5. The adaptive anti-condensation control system based on post-positioned anti-condensation tube according to claim 3 is characterized in that: The control module is configured as follows: When 45% < RH ≤ 75%, the compressor operates at the rotation speed of the preset energy consumption program, where the rotation speed at an ambient temperature of 32°C is 1800 ± 300 rpm, and the rotation speed at an ambient temperature of 16°C is 1200 ± 150 rpm.

6. The adaptive anti-condensation control system based on post-positioned anti-condensation tube according to claim 3, characterized in that: The control module is configured as follows: When RH > 80%, the rotation speed of the compressor is adjusted to 960 - 1200 rpm; the refrigeration set temperature is quantified to 4°C, and the freezing set temperature is quantified to -18°C.

7. The adaptive anti-condensation control system based on the post-positioned anti-condensation tube according to claim 6 is characterized in that: The control module is configured as follows: When the environmental humidity is in the range of 45% < RH ≤ 80%, if the environmental temperature is higher than the preset temperature threshold, control the rotation speed of the compressor to increase by 5% - 10% compared with the normal rotation speed in this range; if the environmental temperature is lower than the preset temperature threshold, control the rotation speed of the compressor to decrease by 5% - 10% compared with the normal rotation speed in this range.

8. The adaptive anti-condensation control system based on post-positioned anti-condensation tube according to claim 1, characterized in that: The environmental humidity sensor collects the environmental humidity signal every 3 - 10 minutes.

9. The adaptive anti-condensation control system based on post-positioned anti-condensation tube according to claim 7, characterized in that: The control module is configured as follows: When 45% < RH ≤ 80% and the continuous closing time of the refrigerator door exceeds the preset duration, the control module reduces the compressor speed to 80% - 90% of the normal speed and extends the acquisition interval of the ambient humidity sensor to 15 - 20 minutes; when the refrigerator door is detected to be opened or the fluctuation range of the ambient humidity exceeds ±5%, it resumes to the original speed and acquisition interval.

10. A refrigerator, characterized in that: The refrigerator includes the adaptive anti-condensation control system based on the rear-mounted anti-condensation tube according to any one of claims 1 - 9.

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