Refrigeration equipment and humidity control method thereof

Abstract

The invention provides refrigeration equipment and a humidity control method of the refrigeration equipment. The refrigeration equipment is provided with a refrigeration chamber, an air duct located on the rear side of the refrigeration chamber and an air return port formed in the bottom of the air duct, an auxiliary fan is arranged in the air duct, and the air duct communicates with the outside of the refrigeration chamber; the refrigeration equipment further comprises a first air door and a second air door, the first air door is arranged at the air return opening and used for opening or closing a passage between the air flue and the refrigeration chamber, and the second air door is used for opening or closing a passage between the air flue and the outside of the refrigeration equipment. And the auxiliary fan sucks air outside the refrigeration chamber into the air duct or blows air in the air duct out of the refrigeration chamber. According to the refrigeration equipment, the air direction is converted through the auxiliary fan, the first air door and the second air door are opened or closed, the humidity of the chamber is adjusted through the external humidity, and the humidity is greatly adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a refrigeration equipment and a humidity control method for the refrigeration equipment. Background Art

[0002] Refrigerators, ice bars and some freezers are used as a means of household food storage. Different foods have different humidity requirements. For example, fruits and vegetables prefer a higher humidity storage environment; while grains and dry goods prefer a low humidity environment.

[0003] The refrigerators currently on the market (including refrigerators, ice bars and other household refrigerators) control the temperature but not the humidity; or they extend the fan rotation to ensure low humidity during refrigeration, and the fan rotation to ensure humidification in the box when the evaporator is defrosted. However, this humidity control method can only ensure a certain increase or decrease in humidity, but not a significant increase or decrease in humidity. Summary of the invention

[0004] The object of the present invention is to provide a refrigeration device and a humidity control method for the refrigeration device. The refrigeration device is provided with a first damper and a second damper, and the two dampers respectively control the connection and disconnection of the air duct with the refrigeration room and the outside world. The auxiliary fan can blow air in two directions. Therefore, the outside humidity can be used to increase or decrease the humidity in the refrigeration room under the cooperation of the auxiliary fan, the first damper and the second damper, thereby solving the problem of small adjustment range of the indoor humidity in the refrigeration room in the prior art.

[0005] In order to achieve one of the above-mentioned objects of the invention, an embodiment of the present invention provides a refrigeration device, which is formed with a refrigeration compartment, an air duct located at the rear side of the refrigeration compartment and a return air outlet formed at the bottom of the air duct, an auxiliary fan is arranged in the air duct, the air duct is connected to the outside of the refrigeration compartment, the refrigeration device further includes a first air door and a second air door, the first air door is arranged at the return air outlet to open or close the passage between the air duct and the refrigeration compartment, the second air door opens or closes the passage between the air duct and the outside of the refrigeration device, and the auxiliary fan sucks the air outside the refrigeration compartment into the air duct or blows the air in the air duct out of the refrigeration compartment.

[0006] As a further improvement of an embodiment of the present invention, a through hole communicating with the outside of the refrigeration compartment is formed at the bottom of the air duct, the first air door and the second air door are integrally arranged at the bottom of the air duct, and the auxiliary fan blows air upward or downward.

[0007] As a further improvement of an embodiment of the present invention, a water receiving tray is provided at the bottom of the air duct, a drain pipe is connected to the bottom of the water receiving tray, the through hole is connected to the drain pipe through a connecting pipe, and is connected to the outside of the refrigeration compartment through the drain pipe.

[0008] An embodiment of the present invention further provides a humidity control method for a refrigeration device, wherein the refrigeration device is the refrigeration device as described above, and further comprises an evaporator, an evaporating fan and a refrigeration damper arranged in the air duct, wherein the refrigeration damper connects or disconnects a channel through which the evaporating fan blows cold air toward the refrigeration compartment;

[0009] The humidity control method comprises the following steps:

[0010] Get humidity control instructions;

[0011] Determine whether the temperature T in the refrigeration room is within the preset temperature T 预 within the scope;

[0012] If the temperature T in the refrigeration room is within the preset temperature T 预 If the integrated humidity RH in the refrigeration room during the previous cycle is within the range, the integrated humidity RH in the refrigeration room during the previous cycle is compared with the preset humidity RH. 预 Compare the range;

[0013] If the integrated humidity RH in the refrigeration room in the previous cycle is lower than the preset minimum humidity RH 低 , the evaporator is controlled to defrost, the refrigeration damper and the evaporating fan are closed, and when the evaporator temperature T is detected 蒸 When m, the ambient humidity RH is detected 环 And control the evaporator to stop defrosting, the refrigeration damper and the evaporation fan are open; if the ambient humidity RH 环 When the humidity is higher than the integrated humidity RH in the refrigeration room in the previous cycle, the first damper and the second damper are both controlled to open, and the auxiliary fan is controlled to blow air upwards; otherwise, the first damper is controlled to open, the second damper is controlled to close, and the auxiliary fan is controlled to blow air upwards;

[0014] If the integrated humidity RH in the refrigeration room in the previous cycle is higher than the preset maximum humidity RH 高 , then when the ambient humidity RH 环 When the humidity is lower than the integrated humidity RH in the refrigeration room in the previous cycle, the first damper and the second damper are both controlled to open, and the auxiliary fan is controlled to blow air upward; otherwise, the first damper is controlled to open, the second damper is controlled to close, and the auxiliary fan is controlled to blow air upward.

[0015] As a further improvement of an embodiment of the present invention, when the integrated humidity RH in the refrigeration room in the previous cycle is lower than the preset minimum humidity RH 低 When the evaporator temperature T 蒸 The m value varies with the preset temperature T of the refrigeration room. 预 The increase showed an increasing trend.

[0016] As a further improvement of an embodiment of the present invention, the preset temperature T of the refrigeration compartment is 预When the temperature is 5-8℃, m is 2℃, the preset temperature of the refrigeration room is T 预 When the temperature is 9-13℃, m is 6℃, and the preset temperature of the refrigeration room is T 预 When the temperature is 14-20℃, m is 9℃.

[0017] As a further improvement of an embodiment of the present invention, if the integrated humidity RH in the refrigeration room in the previous cycle is within the preset humidity RH 预 If the temperature is within the range and the evaporator defrost command is received, the compressor is controlled to start first to reduce the humidity in the refrigeration room by n%, and then the evaporator is controlled to defrost. 环 With the increase of , n tends to decrease.

[0018] As a further improvement of an embodiment of the present invention, when the ambient temperature T 环 When the ambient temperature is less than 18℃, n is 10. When the ambient temperature is less than 18℃, n is 10. 环 When the ambient temperature is less than 28℃, n is 8. 环 When ≥28℃, n is 5.

[0019] As a further improvement of an embodiment of the present invention, when the evaporator is defrosted, the refrigeration damper, the first damper is controlled to be closed, the second damper is opened, and the auxiliary fan blows air downward.

[0020] As a further improvement of an embodiment of the present invention, when the integrated humidity RH in the refrigeration room in the previous cycle is higher than the preset maximum humidity RH 高 When the temperature is low, the speed of the evaporating fan is controlled to decrease.

[0021] As a further improvement of an embodiment of the present invention, the calculation method of the integrated humidity RH in the refrigeration room in the previous cycle is as follows:

[0022] The previous cycle starts timing, and the first relative humidity value, the second relative humidity value, ..., and the last relative humidity value are obtained at preset time intervals and are recorded as rh1, rh2, ..., rh n , integrated humidity RH = (rh1 + rh2 + ... + rh n ) / n.

[0023] As a further improvement of an embodiment of the present invention, the refrigeration equipment further includes a humidity sensor disposed in the refrigeration room, and the humidity sensor is used to monitor and obtain the i-th relative humidity value rh in the ripening room every 30 seconds. i .

[0024] As a further improvement of an embodiment of the present invention, the cycle time of the integrated humidity RH is calculated as a function of the ambient temperature T 环 of increase, showing a decreasing trend.

[0025] As a further improvement of an embodiment of the present invention, when the ambient temperature T 环 When the temperature is less than 18℃, the cycle time for calculating the integral humidity RH is 5h. When 18℃≤ambient temperature T 环 When the ambient temperature is less than 28℃, the cycle time for calculating the integral humidity RH is 2.5h. 环 When the temperature is ≥28℃, the cycle time for calculating the integrated humidity RH is 2h.

[0026] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0027] In the refrigeration device provided by the present invention, an auxiliary fan is arranged in the air duct, and a first air door and a second air door are arranged at the return air outlet. The auxiliary fan can blow air in two directions, and the first air door and the second air door respectively connect the air duct with the refrigeration room and the outside world. By adjusting the blowing direction of the auxiliary fan and the opening conditions of the first air door and the second air door, the indoor air of the refrigeration room and the outside air can be circulated and the humidity can be adjusted when needed. With the help of the outside humidity, the indoor humidity of the refrigeration room can be adjusted more quickly to prevent the indoor humidity of the refrigeration room from being too small to always reach the preset humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the refrigeration equipment in the embodiment of the present invention.

[0029] Figure 2 It is a flow chart of the humidity control method of the refrigeration equipment in the embodiment of the present invention.

[0030] 1. Refrigeration room; 2. Air duct; 21. Return air outlet; 3. Refrigeration damper; 4. Evaporating fan; 5. Evaporator; 6. Auxiliary fan; 71. First damper; 72. Second damper; 81. Drain tray; 82. Drain pipe; 83. Drain box. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Terms such as "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used herein to indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. Terms of spatial relative positions may be intended to include different orientations of the device in use or operation other than the orientation shown in the drawings.

[0033] For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] Furthermore, it should be understood that although the terms first, second, etc. may be used herein to describe various elements or structures, these described objects should not be limited by these terms. These terms are only used to distinguish these described objects from each other. For example, a first damper may be referred to as a second damper, and similarly, a second damper may also be referred to as a first damper, without departing from the scope of protection of this application.

[0036] The embodiment of the present invention provides a refrigeration device, such as Figure 1 As shown, a refrigeration room 1, an air duct 2 located at the rear side of the refrigeration room 1 and a return air port 21 formed at the bottom of the air duct 2 are formed, an auxiliary fan 6 is arranged in the air duct 2, the air duct 2 is communicated with the outside of the refrigeration room 1, and the refrigeration device further includes a first air door 71 and a second air door 72. The first air door 71 is arranged at the return air port 21 to open or close the passage between the air duct 2 and the refrigeration room 1, and the second air door 72 opens or closes the passage between the air duct 2 and the outside of the refrigeration device. The auxiliary fan 6 sucks the air outside the refrigeration room 1 into the air duct 2 or blows the air in the air duct 2 out of the refrigeration room 1.

[0037] The refrigeration device provided in the embodiment of the present invention further includes an evaporator 5, an evaporating fan 4 and a refrigeration damper 3 arranged in the air duct 2. The evaporator 5 is refrigerated, and the evaporating fan 4 blows the cold air after being refrigerated by the evaporator 5 upward, and finally flows to the refrigeration compartment 1. The refrigeration damper 3 connects or disconnects the channel for the evaporating fan 4 to blow the cold air to the refrigeration compartment 1. A water receiving tray 81 is also provided at the bottom of the air duct 2, and a drain pipe 82 is connected to the bottom of the water receiving tray 81. The defrost water collected in the water receiving tray 81 is discharged to the water receiving box 83 at the bottom of the refrigeration device through the drain pipe 82, and the drain pipe 82 is connected to the outside of the refrigeration compartment 1. The evaporating fan 4 in this embodiment is a centrifugal fan, and the auxiliary fan 6 is an axial flow fan. Of course, the types of the two fans are not limited to this.

[0038] Furthermore, a through hole is provided at the bottom of the air duct 2, which is connected to the drain pipe 82 through a connecting pipe. The first damper 71 and the second damper 72 are integrally arranged at the bottom of the air duct 2. The second damper 72 opens or closes the through hole to connect or disconnect the air duct 2 with the outside of the refrigeration compartment 1, thereby allowing the auxiliary fan 6 to blow air upward and downward. Figure 1 The through holes and connecting pipes are not shown.

[0039] The refrigeration device provided by the embodiment of the present invention is provided with an auxiliary fan 6 in the air duct 2 and a first damper 71 and a second damper 72 at the return air outlet 21. The auxiliary fan 6 can blow air in two directions. The first damper 71 connects the air duct 2 and the refrigeration chamber 1, and the second damper 72 connects the air duct 2 and the outside. By adjusting the blowing direction of the auxiliary fan 6 and the opening conditions of the first damper 71 and the second damper 72, the air in the refrigeration chamber 1 and the outside air can be circulated and the humidity can be adjusted when necessary. With the help of the outside humidity, the humidity in the refrigeration chamber 1 can be adjusted faster to prevent the humidity in the refrigeration chamber 1 from being adjusted too little and unable to reach the preset humidity.

[0040] The humidity control method for the refrigeration equipment by using the auxiliary fan 6 and the damper assembly comprises the following steps:

[0041] Determine whether the temperature T in the refrigeration chamber 1 is within the preset temperature T 预 within the scope;

[0042] If the temperature T in the refrigeration room 1 is above the preset temperature T 预 If the integrated humidity RH in the refrigeration room 1 in the previous cycle is within the range, the integrated humidity RH in the refrigeration room 1 in the previous cycle is compared with the preset humidity RH. 预 Compare the range;

[0043] If the integrated humidity RH in the refrigeration compartment 1 in the previous cycle is lower than the preset minimum humidity RH 低 , the evaporator 5 is controlled to defrost, the refrigeration damper 3 and the evaporating fan 4 are closed, and when the evaporator 5 temperature T is detected 蒸 When m, the ambient humidity RH is detected环 And control the evaporator 5 to stop defrosting, the refrigeration damper 3 and the evaporation fan 4 are opened; if the ambient humidity RH 环 When the humidity is higher than the integrated humidity RH in the refrigeration chamber 1 in the previous cycle, the first damper 71 and the second damper 72 are both controlled to open, and the auxiliary fan 6 is controlled to blow air upward; otherwise, the first damper 71 is controlled to open, the second damper 72 is controlled to close, and the auxiliary fan 6 is controlled to blow air upward;

[0044] If the integrated humidity RH in the refrigeration compartment 1 in the previous cycle is higher than the preset maximum humidity RH 高 , then when the ambient humidity RH 环 When the humidity is lower than the integrated humidity RH in the refrigeration chamber 1 in the previous cycle, the first damper 71 and the second damper 72 are both controlled to open, and the auxiliary fan 6 is controlled to blow air upward; otherwise, the first damper 71 is controlled to open, the second damper 72 is controlled to close, and the auxiliary fan 6 is controlled to blow air upward.

[0045] When the refrigeration room 1 adjusts and controls the humidity, it is usually necessary that the temperature T in the refrigeration room meets the preset temperature T 预 If the temperature T in the refrigeration room 1 has not yet fallen within the preset temperature T, the temperature of the refrigeration room 1 must be controlled until the temperature T in the refrigeration room 1 meets the preset temperature T. 预 After that, the humidity in the refrigeration room 1 is adjusted and controlled.

[0046] The humidity in the refrigeration room 1 varies greatly, with the instantaneous humidity and the preset humidity RH 预 The comparison will result in frequent start and stop of the above dampers and fans. Therefore, the integral humidity RH in the refrigeration room 1 in the previous cycle is compared with the preset humidity RH. Specifically, the calculation method of the integral humidity RH in the refrigeration room 1 in the previous cycle is as follows:

[0047] The previous cycle starts timing, and the first relative humidity value, the second relative humidity value, ..., and the last relative humidity value are obtained at preset time intervals and are recorded as rh1, rh2, ..., rh n , integrated humidity RH = (rh1 + rh2 + ... + rh n ) / n.

[0048] In order to obtain the humidity in the refrigeration room, the refrigeration equipment also includes a humidity sensor arranged in the refrigeration room 1. The humidity sensor monitors the relative humidity value rh in the ripening room every 30 seconds. i The above-mentioned integrated humidity RH is obtained by calculation.

[0049] Because different ambient temperatures T rings have a great influence on the refrigeration cycle in the refrigeration room 1, and when the refrigeration room 1 is refrigerating, the humidity in the refrigeration room 1 decreases, and when the refrigeration room 1 stops refrigerating, the humidity in the refrigeration room 1 will gradually increase. Therefore, different ambient temperatures T rings also have a great influence on the cycle of calculating the integral humidity RH.

[0050] Calculate the cycle time of the integrated humidity RH versus the ambient temperature T 环 Preferably, when the ambient temperature T 环 When the temperature is less than 18℃, the cycle time for calculating the integral humidity RH is 5h. When 18℃≤ambient temperature T 环 When the ambient temperature is less than 28℃, the cycle time for calculating the integral humidity RH is 2.5h. 环 When the temperature is ≥28℃, the cycle time for calculating the integrated humidity RH is 2h.

[0051] If the integrated humidity RH in the refrigeration compartment 1 in the previous cycle is lower than the preset minimum humidity RH 低 , the integrated humidity RH in the refrigeration room 1 in the previous cycle is low, and humidification is required in the refrigeration room 1. First, the frost on the evaporator 5 can be heated and evaporated to humidify the refrigeration room 1. However, in order to avoid the heat of the heated frost blowing to the refrigeration room 1 when the evaporator 5 is defrosted, causing the temperature in the refrigeration room 1 to rise, the refrigeration damper 3 and the evaporation fan 4 need to be closed until the temperature T steam of the evaporator 5 reaches the preset value m, and then the defrosting of the evaporator 5 is stopped, that is, the heating of the evaporator 5 is stopped, and then the refrigeration damper 3 and the evaporation fan 4 are opened to blow the water vapor in the air duct 2 when the evaporator 5 is defrosted to the refrigeration room 1 to achieve humidification.

[0052] In addition, after the temperature Tevaporation of the evaporator 5 reaches the preset value m, the ambient humidity RH ring is detected. If the ambient humidity RH ring is high, the first damper 71 and the second damper 72 are opened while the refrigeration damper 3 and the evaporation fan 4 are opened, and the auxiliary fan 6 is controlled to blow upward. On the one hand, the water vapor obtained by defrosting the evaporator 5 in the air duct 2 is blown to the refrigeration compartment 1, and the air circulation between the air duct 2 and the refrigeration compartment 1 is realized through the first damper 71. On the other hand, the auxiliary fan 6 is used to bring the water vapor in the environment into the refrigeration compartment 1 for humidification. Of course, if the ambient humidity RH ring is low, the first damper 71 is opened, the second damper 72 is closed, and the auxiliary fan 6 is controlled to blow upward to avoid bringing in dry air in the environment, and at the same time, the air circulation between the air duct 2 and the refrigeration compartment 1 is realized.

[0053] Evaporator 5 temperature T 蒸The m value is related to the preset temperature Tpreset of the refrigerating compartment 1. The higher the preset temperature Tpreset of the refrigerating compartment 1, the higher the m value of the temperature Tevaporation of the evaporator 5. However, it will never exceed the preset temperature Tpreset of the refrigerating compartment 1, so as to avoid the evaporator 5 temperature Tevaporation being too high and affecting the temperature rise of the refrigerating compartment 1.

[0054] Preferably, the preset temperature T of the refrigeration chamber 1 预 When it is 5-8℃, m is 2℃, the preset temperature T of refrigeration room 1 预 When the temperature is 9-13℃, m is 6℃, the preset temperature T of refrigeration room 1 预 When the temperature is 14-20℃, m is 9℃.

[0055] If the integrated humidity RH in the refrigeration compartment 1 in the previous cycle is higher than the preset maximum humidity RH 高 , the integrated humidity RH in the refrigeration room 1 in the previous cycle is too high, and the humidity in the refrigeration equipment needs to be reduced. The refrigeration room 1 can be started to refrigerate, and the speed of the evaporating fan 4 is reduced when the refrigeration room 1 is refrigerated, so that the air in the refrigeration room 1 and the air in the air duct 2 circulate slowly, thereby extending the refrigeration time of the refrigeration room 1, so that there is more time for the water vapor in the refrigeration room 1 to circulate into the air duct 2 and contact with the low-temperature evaporator 5 to frost, thereby reducing the humidity in the refrigeration room 1.

[0056] In addition, if the ambient humidity RH is detected to be low, the first damper 71 and the second damper 72 are both opened, and the auxiliary fan 6 is controlled to blow upward, so that the air in the refrigeration room 1 and the air in the air duct 2 circulate, and the low-humidity air in the environment is sucked into the air duct 2 and then blown to the refrigeration room 1, thereby reducing the humidity in the refrigeration room 1. Of course, if the ambient humidity RH is high, the first damper 71 is opened, the second damper 72 is closed, and the auxiliary fan 6 is controlled to blow upward to prevent water vapor in the environment from entering the refrigeration room 1.

[0057] Furthermore, if the integrated humidity RH in the refrigeration compartment 1 in the previous cycle is within the preset humidity RH range, it is not necessary to control the dampers, fans, etc., and the existing state can be maintained.

[0058] However, if the integrated humidity RH in the refrigeration room 1 in the previous cycle is within the preset humidity RH range, the defrosting instruction of the evaporator 5 is received, the compressor is controlled to start first, so that the humidity in the refrigeration room 1 is reduced by n%, and then the evaporator 5 is controlled to defrost. 环 With the increase of , n tends to decrease.

[0059] When the evaporator 5 is defrosted, even if the passage between the air duct 2 and the refrigerating chamber 1 is cut off, so that the heat and water vapor generated by the defrosting of the evaporator 5 cannot enter the refrigerating chamber 1, even according to the control method of the refrigerating damper 3, the first damper 71, the second damper 72 and the auxiliary fan 6 described below, after the evaporator 5 is defrosted, some heat and water vapor will still remain in the air duct 2 and eventually blow to the refrigerating chamber 1. In order to prevent the defrosting of the evaporator 5 from affecting the humidity and temperature in the refrigerating chamber 1 beyond the preset range, before controlling the evaporator 5 to defrost, the compressor is controlled to start first to reduce the humidity in the refrigerating chamber 1 in advance.

[0060] Preferably, when the ambient temperature Tring is less than 18°C, n is 10, when 18°C≤ambient temperature Tring<28°C, n is 8, and when the ambient temperature Tring is greater than or equal to 28°C, n is 5.

[0061] Furthermore, when the evaporator 5 is defrosted, in order to prevent the heat and water vapor generated by the defrosting of the evaporator 5 from being blown toward the refrigeration compartment 1, causing the temperature and humidity of the refrigeration compartment 1 to rise, the refrigeration damper 3 and the first damper 71 are controlled to be closed, the second damper 72 is opened, the auxiliary fan 6 blows air downward, and the damper connecting the air duct 2 with the refrigeration compartment 1 is closed, so that the heat and water vapor generated after the evaporator 5 is defrosted cannot enter the refrigeration compartment 1, and with the help of the auxiliary fan 6, the heat and water vapor generated by the defrosting of the evaporator 5 are blown toward the external environment, further preventing the evaporator fan 4 from bringing the heat and water vapor in the air duct 2 into the refrigeration compartment 1 during the next refrigeration.

[0062] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0063] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A refrigeration device, characterized in that: A refrigeration compartment, an air duct located at the rear side of the refrigeration compartment and a return air outlet formed at the bottom of the air duct are formed, an auxiliary fan is arranged in the air duct, the air duct is communicated with the outside of the refrigeration compartment, the refrigeration device further comprises a first air door and a second air door, the first air door is arranged at the return air outlet to open or close the passage between the air duct and the refrigeration compartment, the second air door opens or closes the passage between the air duct and the outside of the refrigeration device, the auxiliary fan sucks the air outside the refrigeration compartment into the air duct or blows the air in the air duct out of the refrigeration compartment.

2. The refrigeration equipment according to claim 1, characterized in that: A through hole communicating with the outside of the refrigeration compartment is formed at the bottom of the air duct, the first air door and the second air door are integrally arranged at the bottom of the air duct, and the auxiliary fan blows air upward or downward.

3. The refrigeration equipment according to claim 2, characterized in that: A water receiving tray is arranged at the bottom of the air duct, a drain pipe is connected to the bottom of the water receiving tray, the through hole is communicated with the drain pipe through a connecting pipe, and is communicated with the outside of the refrigeration compartment through the drain pipe.

4. A humidity control method for refrigeration equipment, characterized in that: The refrigeration device is the refrigeration device according to any one of claims 1 to 3, and the refrigeration device further comprises an evaporator, an evaporating fan and a refrigeration damper arranged in the air duct, and the refrigeration damper connects or disconnects the channel through which the evaporating fan blows cold air to the refrigeration compartment; The humidity control method comprises the following steps: Get humidity control instructions; Determine whether the temperature T in the refrigeration room is within the preset temperature T 预 within the scope; If the temperature T in the refrigeration room is within the preset temperature T 预 If the integrated humidity RH in the refrigeration room during the previous cycle is within the range, the integrated humidity RH in the refrigeration room during the previous cycle is compared with the preset humidity RH. 预 Compare the range; If the integrated humidity RH in the refrigeration room in the previous cycle is lower than the preset minimum humidity RH 低 , the evaporator is controlled to defrost, the refrigeration damper and the evaporating fan are closed, and when the evaporator temperature T is detected 蒸 When m, the ambient humidity RH is detected 环 And control the evaporator to stop defrosting, the refrigeration damper and the evaporation fan are open; if the ambient humidity RH 环 When the humidity is higher than the integrated humidity RH in the refrigeration room in the previous cycle, the first damper and the second damper are both controlled to open, and the auxiliary fan is controlled to blow air upwards; otherwise, the first damper is controlled to open, the second damper is controlled to close, and the auxiliary fan is controlled to blow air upwards; If the integrated humidity RH in the refrigeration room in the previous cycle is higher than the preset maximum humidity RH 高 , then when the ambient humidity RH 环 When the humidity is lower than the integrated humidity RH in the refrigeration room in the previous cycle, the first damper and the second damper are both controlled to open, and the auxiliary fan is controlled to blow air upward; otherwise, the first damper is controlled to open, the second damper is controlled to close, and the auxiliary fan is controlled to blow air upward.

5. The humidity control method for refrigeration equipment according to claim 4, characterized in that: When the integrated humidity RH in the refrigeration room in the previous cycle is lower than the preset minimum humidity RH 低 When the evaporator temperature T 蒸 The m value varies with the preset temperature T of the refrigeration room. 预 The increase showed an increasing trend.

6. The humidity control method for refrigeration equipment according to claim 5, characterized in that: Preset temperature of refrigeration compartment T 预 When the temperature is 5-8℃, m is 2℃, and the preset temperature of the refrigeration room is T 预 When the temperature is 9-13℃, m is 6℃, and the preset temperature of the refrigeration room is T 预 When the temperature is 14-20℃, m is 9℃.

7. The humidity control method for refrigeration equipment according to claim 4, characterized in that: If the integrated humidity RH in the refrigeration room in the previous cycle is within the preset humidity RH range and the evaporator defrost command is received, the compressor is first controlled to start to reduce the humidity in the refrigeration room by n%, and then the evaporator is controlled to defrost. 环 With the increase of , n tends to decrease.

8. The humidity control method for refrigeration equipment according to claim 7, characterized in that: When the ambient temperature T 环 When the ambient temperature is less than 18℃, n is 10. When the ambient temperature is less than 18℃, n is 10. 环 When the ambient temperature is less than 28℃, n is 8. 环 When ≥28℃, n is 5.

9. The humidity control method for refrigeration equipment according to claim 7, characterized in that: When the evaporator is defrosted, the refrigeration damper is controlled, the first damper is closed, the second damper is opened, and the auxiliary fan blows air downward.

10. The humidity control method for refrigeration equipment according to claim 4, characterized in that: When the integrated humidity RH in the refrigeration room in the previous cycle is higher than the preset maximum humidity RH 高 When the temperature is low, the speed of the evaporating fan is controlled to decrease.

11. The humidity control method for refrigeration equipment according to any one of claims 4 to 10, characterized in that: The calculation method of the integrated humidity RH in the refrigeration room during the previous cycle is as follows: The previous cycle starts timing, and the first relative humidity value, the second relative humidity value, ..., and the last relative humidity value are obtained at preset time intervals and are recorded as rh1, rh2, ..., rh n , integrated humidity RH = (rh1 + rh2 + ... + rh n ) / n.

12. The humidity control method for refrigeration equipment according to claim 11, characterized in that: The refrigeration equipment also includes a humidity sensor disposed in the refrigeration room, and the humidity sensor is used to monitor and obtain the i-th relative humidity value rh in the ripening room every 30 seconds. i .

13. The humidity control method for refrigeration equipment according to claim 12, characterized in that: Calculate the cycle time of the integrated humidity RH versus the ambient temperature T 环 of increase, showing a decreasing trend.

14. The humidity control method for refrigeration equipment according to claim 13, characterized in that: When the ambient temperature T 环 When the temperature is less than 18℃, the cycle time for calculating the integral humidity RH is 5h. When 18℃≤ambient temperature T 环 When the ambient temperature is less than 28℃, the cycle time for calculating the integral humidity RH is 2.5h. 环 When the temperature is ≥28℃, the cycle time for calculating the integrated humidity RH is 2h.

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