Humidification device, refrigerator and humidification control method

Abstract

The invention discloses a humidifying device, a refrigerator and a humidifying control method.The humidifying device comprises an air duct, a first air outlet, a second air outlet and a fresh air fan, the air duct is provided with an air inlet, a first air outlet and a second air outlet, the fresh air fan drives air to flow from the air inlet to the air outlets, the first air outlet is communicated with the interior of a room, the air inlet and the second air outlet are communicated with the exterior of the room, and each air outlet is provided with an air valve; the surface air cooler is located between the air inlet and the air outlet, and an air duct heater is arranged between the air outlet side of the surface air cooler and the air outlet; and the water collecting tank is arranged below the surface air cooler, and the water collecting tank is provided with a water tank heater. According to the humidifying device, ambient air is introduced to humidify the indoor space, the ambient air is fed into the indoor space after the temperature and humidity of the ambient air are pretreated through the surface air cooler and the heater, the humidifying effect is stable and reliable, and meanwhile indoor condensation is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of humidity regulation, and in particular to a humidifying device, a refrigerator and a humidification control method. Background Art

[0002] As the pace of modern life accelerates, people's demands for food preservation are becoming increasingly diverse, especially for fruits and vegetables. In order to meet this demand, the preservation ability of refrigerators has become one of the important indicators to measure their performance. Fruits and vegetables can maintain better moisture content and cell structure in a high humidity environment, thereby extending their shelf life. This scientific principle has been widely recognized and applied to refrigerator preservation technology.

[0003] In order to create the high humidity environment required for the preservation of fruits and vegetables, many refrigerator products with humidification functions have appeared on the market. These products release an appropriate amount of water vapor into the refrigerator through a built-in or external humidification device to increase the humidity level inside the refrigerator. However, the implementation of existing humidification devices mostly relies on an external water source, that is, the user needs to regularly add water to the refrigerator to ensure the continuous operation of the humidification device. Not only is the operation cumbersome, but it may also lead to insufficient humidification due to user negligence, thereby affecting the preservation effect.

[0004] In addition, another common humidification method is to introduce outdoor ambient air to humidify the refrigerator. However, since the temperature of the outdoor ambient air is usually much higher than the temperature of the refrigerator's internal cold storage room (generally set at around 4°C), when the humidity of the outside air is high, the air entering the refrigerator is prone to condensation due to a sudden drop in temperature. If the accumulation of condensation water is not cleaned up in time, it will not only cause the internal environment of the refrigerator to be humid, but also become a breeding ground for bacteria, which will have an adverse effect on the preservation of food.

[0005] Therefore, how to design a humidification device, a refrigerator and a humidification control method that are efficient and stable and do not require an external water source is a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0006] In order to solve the defects of existing humidification devices such as cumbersome operation and unstable humidification effect, the present invention proposes a humidification device, a refrigerator and a humidification control method. The humidification device introduces ambient air into the room for humidification, and pre-treats the temperature and humidity of the ambient air through a surface cooler and a heater before sending it into the room. No external water source is required, the humidification effect is stable and reliable, and condensation is prevented indoors.

[0007] The technical solution adopted by the present invention is to design a humidifying device, comprising:

[0008] An air duct, which is provided with an air inlet, at least one air outlet, and a fresh air fan driving air from the air inlet to the air outlet;

[0009] A surface cooler is located between the air inlet and the air outlet, and an air duct heater is provided between the air outlet side of the surface cooler and the air outlet;

[0010] The water collecting tank is arranged below the surface cooler, and the water collecting tank is equipped with a water tank heater.

[0011] Furthermore, the air duct is provided with a first air outlet and a second air outlet, the air inlet and the second air outlet are both connected to the outside, the first air outlet is connected to the inside, and each air outlet is installed with an air valve.

[0012] Furthermore, a temperature and humidity sensor is installed at the surface cooler, a temperature sensor is installed at the air outlet, a water level sensor is installed in the water collection tank, and the temperature and humidity sensor, the temperature sensor and the water level sensor are all connected to the controller of the humidifying device.

[0013] Furthermore, the air valve is in a closed state by default.

[0014] The present invention also provides a refrigerator, comprising: a refrigeration system and the above-mentioned humidifying device, wherein a surface cooler of the humidifying device and an evaporator of the refrigeration system are connected in parallel in a refrigerant circulation loop.

[0015] The present invention also proposes a humidification control method, which is applied to the above-mentioned refrigerator and includes:

[0016] When receiving the humidification instruction, the outdoor environment humidity d1, the target moisture content d2 and the target temperature T2 are obtained;

[0017] Detect the air humidity at the surface cooler d 表 , air temperature T 表 and the ambient temperature T at the air outlet 风 ;

[0018] The outdoor environment humidity d1 and the air moisture content d 表 Compared with the target moisture content d2, the air temperature T 表 Or the ambient temperature T 风 comparing with the target temperature T2;

[0019] The working state of the humidifying device is adjusted according to the comparison result.

[0020] Further, adjusting the working state of the humidification device according to the comparison result includes:

[0021] When d1>d2, the fresh air fan and the air outlet connected to the outside are turned on, and the surface cooler is controlled to dehumidify. 表=d2, the duct heater is controlled to adjust the air temperature, and at T 风 = At T2, the air outlet connected to the outside is closed, and the air outlet connected to the inside is opened;

[0022] And / or when d1=d2, the fresh air fan and the air outlet connected to the outside are turned on, and the surface cooler is controlled to cool down. 表 = At T2, the air outlet connected to the outside is closed, and the air outlet connected to the inside is opened;

[0023] and / or when d1<d2, the fresh air blower and the air outlet connected to the outside are turned on, and the water tank heater is controlled to humidify. 表 =d2, the surface cooler is controlled to cool down, and at T 表 =T2, close the air outlet connected to the outside of the room, and open the air outlet connected to the inside of the room.

[0024] Further, controlling the surface cooler to dehumidify includes: obtaining the saturation temperature T1 corresponding to the target moisture content d2, and 表 ≥T1+b, turn on the surface cooler, and at T 表 When ≤T1-a, the surface cooler is turned off; where a and b are the set deviations.

[0025] Further, controlling the surface cooler to cool down includes: 表 ≥T2+m, turn on the surface cooler, and at T 表 When ≤T2-n, the surface cooler is turned off; where m and n are the set deviations.

[0026] Further, controlling the air duct heater to adjust the air temperature includes: 风 <T 目标 -g, turn on the duct heater, and at T 风 ≥T 目标 When +k, the air duct heater is turned off; wherein g and k are set deviations.

[0027] Further, controlling the water tank heater to humidify includes:

[0028] Determining whether the actual water level of the water collection tank reaches the target water level;

[0029] If not, the fresh air fan and the air outlet connected to the outside are turned on, and the surface cooler is controlled to condense. When the actual water level reaches the target water level, the surface cooler is turned off, and the water tank heater is turned on for humidification. 表 =d2, the surface cooler is controlled to cool down, and at T 表 = At T2, the air outlet connected to the outside is closed, and the air outlet connected to the inside is opened;

[0030] If so, turn on the fresh air fan and the air outlet connected to the outside, turn on the water tank heater for humidification, and 表 =d2, the surface cooler is controlled to cool down, and at T 表 =T2, close the air outlet connected to the outside of the room, and open the air outlet connected to the inside of the room.

[0031] Further, controlling the surface cooler to condense includes: obtaining the dew point temperature T3 corresponding to the air humidity content dtable and the air temperature Ttable, turning on the surface cooler when the air temperature Ttable ≥ T3+r, and 表 When ≤T3-f, the surface cooler is turned off; where r and f are the set deviations.

[0032] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0033] 1. The humidifier introduces ambient air into the room for humidification. The temperature and humidity of the ambient air are pre-processed by the surface cooler and heater before being sent into the room. The humidification effect is stable and reliable, and condensation is prevented indoors.

[0034] 2. The air inlet and the second air outlet are designed to be connected to the outside. When the water in the water collection tank is insufficient, condensed water can be generated through the surface cooler and the air can be discharged outdoors. No external water source is required, which is simpler and more convenient, and improves the user experience;

[0035] 2. According to the humidity content and temperature of the ambient air, compare the relationship between the ambient temperature and humidity and the target temperature and humidity, select different humidity control schemes for humidification, and finally achieve the humidification target without condensation, meet the refrigerator humidification needs, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention is described in detail below with reference to the embodiments and accompanying drawings, wherein:

[0037] Figure 1 It is a schematic diagram of the structure of the humidifying device of the present invention;

[0038] Figure 2 is a schematic diagram of the air flow direction when the first air outlet of the present invention is opened;

[0039] Figure 3 is a schematic diagram of the air flow direction when the second air outlet of the present invention is opened;

[0040] Figure 4 is a connection diagram of the refrigeration system of the present invention;

[0041] Figure 5 It is a schematic diagram of the refrigerant flow direction when the surface cooler of the present invention is closed;

[0042] Figure 6It is a schematic diagram of the refrigerant flow direction when the surface cooler of the present invention is turned on;

[0043] Figure 7 It is a schematic diagram of the control flow of the refrigerator humidification of the present invention;

[0044] Description of the drawings: 1. Condenser; 2. Compressor; 3. Surface cooler; 4. Evaporator; 5. Switching valve; 6. Throttling device; 7. Regenerator; 8. Dry filter; 9. Anti-condensation tube; 10. Condensing fan; 11. Air inlet; 12. Air duct; 13. Water tank heater; 14. Water collecting tank; 15. Fresh air fan; 16. Duct heater; 17. First air outlet; 18. Second air outlet. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] like Figure 1 , 2 As shown, the humidifying device proposed in the present invention is suitable for refrigeration equipment, including but not limited to refrigerators. The humidifying device includes: an air duct 12, a fresh air fan 15, a surface cooler 3, an air duct heater 16, a water collection tank, and a water tank heater 13, etc. An air inlet 11 is provided at one end of the air duct 12. The air inlet 11 is the entrance of the humidifying device, which is used to introduce ambient air into the air duct 12. At least one air outlet is provided at the other end of the air duct 12, and the air outlet is used to output the treated air to the target area. The fresh air fan 15 is installed in the air duct 12, and is used to drive the air to flow from the air inlet 11 to the air outlet. The function of the fresh air fan 15 is to provide air flow power for the system to ensure that the air can pass through the entire device smoothly and be effectively treated.

[0047] The cooler 3 is located between the air inlet 11 and the air outlet. The function of the cooler 3 is to cool and dehumidify the air. When the air flows through the surface of the cooler 3, it exchanges heat with the cooling medium (water or refrigerant) in the cooler 3, thereby achieving cooling and dehumidification. The duct heater 16 is located between the air outlet side of the cooler 3 and the air outlet. The function of the duct heater 16 is to adjust the temperature of the air after being treated by the cooler 3 to ensure that the air sent into the room reaches a suitable temperature.

[0048] The water collecting tank 14 is arranged below the cooler 3. The function of the water collecting tank 14 is to collect the water condensed on the cooler 3. The design of the water collecting tank 14 enables it to effectively collect and store the condensed water on the cooler 3 for humidification. The water collecting tank 14 is equipped with a water tank heater 13. The function of the water tank heater 13 is to provide heat to the water in the water collecting tank 14. When the ambient air humidity is low, the water in the water collecting tank 14 is evaporated by heating to increase the air humidity.

[0049] The humidification device introduces a surface cooler 3 and a heater to pre-treat the temperature and humidity of the ambient air before sending it into the room, thereby achieving precise regulation of the air temperature and humidity, providing a stable and reliable humidification effect, and preventing condensation from forming indoors.

[0050] like Figures 1 to 3 As shown, in some preferred embodiments of the present invention, the air duct 12 is provided with a first air outlet 17 and a second air outlet 18. The first air outlet 17 is connected to the indoor room. The first air outlet 17 is the main channel for the humidification device to provide humidified air to the indoor room. The air inlet 11 and the second air outlet 18 are both connected to the outdoor room. The second air outlet 18 is used to discharge the treated air to the outdoor room under certain circumstances (when the ambient air humidity is low and the water in the water collection tank is insufficient). Each air outlet is equipped with an air valve to control the flow direction of the air. The outdoor ambient air is introduced into the air duct 12 from the air inlet 11, and after passing through the surface cooler 3 and the air duct heater 16, it flows to the outdoor room from the second air outlet 18 or flows to the indoor room from the first air outlet 17.

[0051] By designing the air inlet 11 and the second air outlet 18 connected to the outdoors, when the water in the water collecting tank 14 is insufficient, condensed water can be generated by the surface cooler 3 and the air can be discharged outdoors without the need for an external water source, which is simpler and more convenient and improves the user experience.

[0052] On the basis of the structure of the humidifying device, in order to realize the automation of humidification control, a temperature and humidity sensor is installed at the cooler 3, and the temperature and humidity sensor is used to detect the temperature and humidity of the air around the cooler 3. A temperature sensor is installed at the air outlet, and the temperature sensor is used to detect the temperature of the air inside the air outlet (located on the side of the air duct 12), that is, to detect the temperature of the air delivered to the room by the humidifying device, to ensure that the output air temperature meets the use requirements of the indoor environment. A water level sensor is installed in the water collection tank 14, and the water level sensor is used to monitor the water level in the water collection tank 14 in real time, so that the controller can issue instructions and take water replenishment actions in time. The temperature and humidity sensor, the temperature sensor and the water level sensor are all connected to the controller of the humidifying device. The controller automatically adjusts the working state of the humidifying device according to the data monitored by the sensor in real time, realizes automatic control, and helps to improve the humidification effect.

[0053] In addition, in order to prevent untreated air or air that does not meet the requirements (such as inappropriate temperature and humidity) from flowing directly into the room, the air valve is in a closed state by default, that is, the air valve is closed by default, so that the humidification device can accurately open the corresponding air valve according to actual needs when it is started to adjust the air flow direction. This precise control helps to achieve more efficient humidification and air conditioning effects.

[0054] like Figures 4 to 6 As shown, the present invention also proposes a refrigerator, comprising: a refrigeration system and the above-mentioned humidifying device, wherein the surface cooler 3 of the humidifying device and the evaporator 4 of the refrigeration system are connected in parallel in a refrigerant circulation loop. The humidifying device can be installed in the foaming layer of the refrigerator, and the controller of the refrigerator controls the working state of the refrigeration system and the humidifying device.

[0055] The refrigerant circulation loop includes a compressor 2, a condenser 1, a throttling device 6 and an evaporator 4 connected in sequence. The evaporator 4 is used to supply cold to the compartment of the refrigerator, and the humidifying device is used to humidify the compartment of the refrigerator. Since the surface cooler 3 of the humidifying device is connected in parallel with the evaporator 4 of the refrigeration system in the refrigerant circulation loop, the refrigerant can also flow through the surface cooler 3. The surface cooler 3 uses the coldness of the refrigerant to cool or dehumidify the air entering the refrigerator. The refrigeration system is provided with a switching valve 5 connected to the refrigerant circulation loop. The switching valve 5 controls the on-off state of the branch where the evaporator 4 and the branch where the surface cooler 3 are located. When the surface cooler 3 is turned on, the switching valve 5 connects the branch where the surface cooler 3 is located, and the surface cooler 3 starts to refrigerate. When the surface cooler 3 is closed, the switching valve disconnects the branch where the surface cooler 3 is located, and the surface cooler 3 stops refrigerating.

[0056] like Figure 1 As shown, in a preferred embodiment, the humidifying device has a first air outlet 17 and a second air outlet 18. The first air outlet 17 is connected to the compartment of the refrigerator, and the second air outlet 18 is connected to the outdoors. The humidifying device can use the second air outlet 18 to collect condensed water to ensure that when the outdoor ambient air humidity is low, there is still enough water in the water collection tank 14 for evaporative humidification, thereby improving the reliability of the humidifying device.

[0057] It should be pointed out that the refrigerator's cold storage compartment usually has a humidification demand. The first air outlet 17 is connected to the cold storage compartment, and the cold storage compartment is humidified by introducing outdoor ambient air. At the same time, the temperature and humidity of the air introduced into the air duct 12 are pre-processed by the surface cooler 3 and the heater. When the humidification demand is met, it is sent to the cold storage compartment for humidification, which not only meets the humidification demand of the refrigerator, but also prevents the formation of condensation water, thereby improving the food preservation effect.

[0058] like Figure 7 As shown, the present invention also proposes a humidification control method, which is applied to the above refrigerator and includes:

[0059] When receiving the humidification instruction, the outdoor environment humidity d1, the target moisture content d2 and the target temperature T2 are obtained;

[0060] Detect the humidity of the air at the cooler 表 , air temperature T 表 and the ambient temperature T at the air outlet 风 ;

[0061] The outdoor humidity d1 and the air humidity d 表 Compared with the target humidity d2, the air temperature T 表 Or the ambient temperature T 风 Compare with target temperature T2;

[0062] The working state of the humidification device is adjusted according to the comparison result.

[0063] This humidification control method compares the relationship between the ambient temperature and humidity and the target temperature and humidity according to the moisture content and temperature of the outdoor ambient air, selects different humidity control schemes for humidification, and ultimately achieves the humidification target without condensation, thereby meeting the refrigerator humidification needs and improving the user experience.

[0064] Specifically, there are three humidity control schemes, as follows:

[0065] The first type is when d1>d2, which means that the outdoor ambient air has a high humidity content. At this time, high-temperature and high-humidity air directly enters the refrigerator compartment and generates a large amount of condensed water. Therefore, it is necessary to control the surface cooler 3 for dehumidification, turn on the fresh air fan 15 and the air outlet connected to the outside (the second air outlet 18), drive the outdoor ambient air into the air duct, use the surface cooler 3 to dehumidify the air, and then use the air duct heater 16 to adjust the air temperature. After the dehumidification process of the surface cooler 3, the air temperature and humidity both decrease. At d 表 =d2, the air humidity reaches the standard, the air duct heater 16 is controlled to adjust the air temperature, the air temperature rises, at T 风 = T2, the air temperature reaches the standard, at this time, the air outlet connected to the outside (the second air outlet 18) is closed, and the air outlet connected to the inside (the first air outlet 17) is opened, and the air with both the temperature and humidity reaching the standard is sent to the compartment for humidification.

[0066] The second type is when d1=d2, which means that the humidity of the ambient air is equal to the target humidity. However, since the ambient temperature is usually much higher than the target temperature T2 (usually 5°C in a cold storage room), the surface cooler 3 needs to be controlled to cool down. The fresh air fan 15 and the air outlet connected to the outside (the second air outlet 18) are turned on to drive the outdoor ambient air into the air duct 12, and the surface cooler 3 is used to cool down the air. After the cooling process of the surface cooler 3, the air temperature drops and the humidity remains unchanged. At T 表= T2, the air temperature reaches the standard, at this time, the air outlet connected to the outside (the second air outlet 18) is closed, and the air outlet connected to the inside (the first air outlet 17) is opened, and the air with both the temperature and humidity reaching the standard is sent to the compartment for humidification.

[0067] The third type is when d1<d2, which means that the humidity of the ambient air is lower than the target humidity. At this time, directly treating the temperature and humidity of the ambient air through the surface cooler 3 and the air duct heater 16 cannot humidify the room, so it is necessary to control the water tank heater 13 for humidification. Open the fresh air fan 15 and the air outlet connected to the outside (the second air outlet 18), drive the outdoor ambient air into the air duct 12, and use the water tank heater 13 to humidify the air. The water in the water collection tank 14 is heated and evaporated, and the air temperature and humidity both rise. 表 =d2, the air humidity reaches the standard, and then the second humidity control scheme is carried out, that is, the surface cooler 3 is controlled to cool down. 表 = T2, the air temperature reaches the standard, at this time, the air outlet connected to the outside (the second air outlet 18) is closed, and the air outlet connected to the inside (the first air outlet 17) is opened, and the air with both the temperature and humidity reaching the standard is sent to the compartment for humidification.

[0068] In some feasible embodiments of the present invention, the dehumidification logic of the surface cooler 3 is: obtain the saturation temperature T1 corresponding to the target humidity content d2. Since there is a close relationship between the saturation temperature and the air humidity content, under a certain air pressure, the higher the saturation temperature, the greater the saturation humidity content. Therefore, the state of the ambient air humidity is reflected by the size of the saturation temperature T1. When T 表 ≥T1+b, it means that the current air humidity is high. At this time, the surface cooler 3 is turned on, and the cooling temperature is lower than the current air dew point temperature. The water vapor in the air condenses into water, thereby reducing the moisture content. When T 表 ≤T1-a, it indicates that the current air humidity is low, and the surface cooler 3 is turned off at this time to prevent the air humidity from continuing to drop; wherein a and b are set deviations.

[0069] In addition, the cooling logic of the surface cooler 3 is: when T 表 ≥T2+m, it means that the current air temperature is too high. At this time, the surface cooler 3 is turned on, and the cooling temperature is higher than the current air dew point temperature. When T 表 ≤T2-n, it indicates that the current air temperature is too low, and the surface cooler 3 is closed at this time to prevent the air temperature from continuing to drop; wherein m and n are the set deviations.

[0070] In some feasible embodiments of the present invention, the regulation logic of the air duct heater is: when T 风 <T 目标 -g, it means that the current air temperature is low. At this time, the air duct heater 16 is turned on to increase the air temperature. 风 ≥T目标 When +k, it indicates that the current air temperature is too high, and the air duct heater 16 is turned off to prevent the air temperature from continuing to rise; wherein g and k are set deviations.

[0071] In some feasible embodiments of the present invention, the humidification logic of the water tank heater 13 is:

[0072] Determine whether the actual water level of the water collection tank 14 reaches the target water level;

[0073] If not, it means that the water in the water collection tank 14 cannot meet the humidification demand, and it is necessary to introduce outdoor ambient air to collect condensed water. Therefore, the fresh air fan 15 and the air outlet connected to the outside (the second air outlet 18) are turned on, and the surface cooler 3 is controlled to condense. The air flows through the surface cooler 3 to produce condensed water, and then the air is discharged to the outside. When the actual water level reaches the target water level, it means that the water in the water collection tank 14 can meet the humidification demand. The surface cooler 3 is turned off, and the water tank heater 13 is turned on for humidification. The water in the water collection tank 14 is heated and evaporated, and the air temperature and humidity both rise. 表 =d2, the air humidity reaches the standard, and the surface cooler 3 is controlled to cool down. 表 =T2, the air temperature reaches the standard, at this time, the air outlet connected to the outside (the second air outlet 18) is closed, and the air outlet connected to the inside (the first air outlet 17) is opened, and the air with both the temperature and humidity reaching the standard is sent to the room for humidification;

[0074] If yes, the water in the water collection tank 14 can meet the humidification demand, the fresh air blower 15 and the air outlet connected to the outside (the second air outlet 18) are turned on, and the water tank heater 13 is turned on for humidification. The water in the water collection tank 14 is heated and evaporated, and the air temperature and humidity both rise. 表 =d2, the air humidity reaches the standard, and the surface cooler 3 is controlled to cool down. 表 = T2, the air temperature reaches the standard, at this time, the air outlet connected to the outside (the second air outlet 18) is closed, and the air outlet connected to the inside (the first air outlet 17) is opened, and the air with both the temperature and humidity reaching the standard is sent to the compartment for humidification.

[0075] Based on this embodiment, the condensation logic of the surface cooler 3 is: obtain the air humidity d 表 and air temperature T 表 The corresponding dew point temperature is T3. 表 ≥T3+r, the surface cooler 3 is turned on, and the cooling temperature is lower than the current dew point temperature of the air. The water vapor in the air condenses into water and drips into the water collection tank 14. 表 When ≤T3-f, the surface cooler 3 is turned off to prevent the ambient temperature from being too low and the condensed water from freezing into ice; wherein r and f are the set deviations.

[0076] It should be understood that the set deviation mentioned above can be designed according to the specific situation, usually within 0-5°C. In practical applications, the cooling capacity of the surface cooler 3, the heating capacity of the air duct heater 16 and the heating capacity of the water tank heater 13 can be adjusted to more flexibly and accurately match the target temperature and humidity to meet the humidification needs of the refrigerator.

[0077] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. When the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof. The order of execution of actions, steps, etc. in the devices and methods shown in the specification and the accompanying drawings can be implemented in any order as long as there is no special explicit limitation on the order and the output of the previous processing is not used in the subsequent processing. Similar terms of order used for the convenience of description do not mean that they must be implemented in such an order.

[0078] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A humidifying device, characterized in that: include: An air duct, which is provided with an air inlet, at least one air outlet, and a fresh air fan driving air from the air inlet to the air outlet; A surface cooler is located between the air inlet and the air outlet, and an air duct heater is provided between the air outlet side of the surface cooler and the air outlet; The water collecting tank is arranged below the surface cooler, and the water collecting tank is equipped with a water tank heater.

2. The humidifying device according to claim 1, characterized in that: The air duct is provided with a first air outlet and a second air outlet, the air inlet and the second air outlet are both connected to the outside of the room, the first air outlet is connected to the inside of the room, and each air outlet is equipped with an air valve.

3. The humidifying device according to claim 2, characterized in that: A temperature and humidity sensor is installed at the surface cooler, a temperature sensor is installed at the air outlet, a water level sensor is installed in the water collecting tank, and the temperature and humidity sensor, the temperature sensor and the water level sensor are all connected to the controller of the humidifying device.

4. The humidifying device according to claim 2, characterized in that: The air valve is in a closed state by default.

5. A refrigerator, characterized in that include: A refrigeration system and a humidifying device as claimed in any one of claims 1 to 4, wherein a surface cooler of the humidifying device is connected in parallel with an evaporator of the refrigeration system in a refrigerant circulation loop.

6. A humidification control method, the humidification control method being applied to the refrigerator according to claim 5, characterized in that: include: When receiving the humidification instruction, the outdoor environment humidity d1, the target moisture content d2 and the target temperature T2 are obtained; Detect the air humidity at the surface cooler d 表 , air temperature T 表 and the ambient temperature T at the air outlet 风 ; The outdoor environment humidity d1 and the air moisture content d 表 Compared with the target moisture content d2, the air temperature T 表 Or the ambient temperature T 风 comparing with the target temperature T2; The working state of the humidifying device is adjusted according to the comparison result.

7. The humidification control method according to claim 6, characterized in that: Adjusting the working state of the humidifying device according to the comparison result includes: When d1>d2, the fresh air fan and the air outlet connected to the outside are turned on, and the surface cooler is controlled to dehumidify. 表 =d2, the duct heater is controlled to adjust the air temperature, and at T 风 = At T2, the air outlet connected to the outside is closed, and the air outlet connected to the inside is opened; And / or when d1=d2, the fresh air fan and the air outlet connected to the outside are turned on, and the surface cooler is controlled to cool down. 表 = At T2, the air outlet connected to the outside is closed, and the air outlet connected to the inside is opened; and / or when d1<d2, the fresh air blower and the air outlet connected to the outside are turned on, and the water tank heater is controlled to humidify. 表 =d2, the surface cooler is controlled to cool down, and at T 表 =T2, close the air outlet connected to the outside of the room, and open the air outlet connected to the inside of the room.

8. The humidification control method according to claim 7, characterized in that: Controlling the surface cooler to dehumidify includes: obtaining the saturation temperature T1 corresponding to the target moisture content d2, 表 ≥T1+b, turn on the surface cooler, and at T 表 When ≤T1-a, turn off the surface cooler; Among them, a and b are the set deviations.

9. The humidification control method according to claim 7, characterized in that: Controlling the surface cooler to cool down comprises: 表 ≥T2+m, turn on the surface cooler, and at T 表 When ≤T2-n, turn off the surface cooler; Among them, m and n are the set deviation amounts.

10. The humidification control method according to claim 7, characterized in that: Controlling the duct heater to adjust the air temperature includes: 风 <T 目标 -g, turn on the duct heater, and at T 风 ≥T 目标 When +k, the air duct heater is turned off; Among them, g and k are the set deviations.

11. The humidification control method according to claim 7, characterized in that: Controlling the water tank heater to humidify includes: Determining whether the actual water level of the water collection tank reaches the target water level; If not, the fresh air fan and the air outlet connected to the outside are turned on, and the surface cooler is controlled to condense. When the actual water level reaches the target water level, the surface cooler is turned off, and the water tank heater is turned on for humidification. 表 =d2, the surface cooler is controlled to cool down, and at T 表 = At T2, the air outlet connected to the outside is closed, and the air outlet connected to the inside is opened; If so, turn on the fresh air fan and the air outlet connected to the outside, turn on the water tank heater for humidification, and 表 =d2, the surface cooler is controlled to cool down, and at T 表 =T2, close the air outlet connected to the outside of the room, and open the air outlet connected to the inside of the room.

12. The humidification control method according to claim 11, characterized in that: Controlling the surface cooler to condense includes: obtaining the dew point temperature T3 corresponding to the air humidity d table and the air temperature T table, turning on the surface cooler when the air temperature T table ≥ T3+r, and 表 When ≤T3-f, turn off the surface cooler; Among them, r and f are the set deviations.

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