Dehumidifier

Abstract

The application discloses a dehumidifier, comprising: an evaporator and a condenser are arranged at intervals to define an air flow channel between the evaporator and the condenser; an auxiliary baffle is swingably arranged at the entrance of the air flow channel for controlling the opening angle of the entrance of the air flow channel; a controller is configured to: determine a refrigerant leakage rate; determine whether the refrigerant leakage rate reaches a predetermined threshold; when the refrigerant leakage rate reaches the predetermined threshold, the auxiliary baffle closes the entrance of the air duct, and the dehumidifier enters a refrigerant leakage protection program; when the refrigerant leakage rate does not reach the predetermined threshold, the swing angle of the auxiliary baffle is adjusted according to the refrigerant leakage rate. According to the dehumidifier of the application, when the dehumidifier operates in a refrigerant leakage state, the superheat of the evaporator can be effectively reduced, and the discharge temperature of the compressor can be reduced, thereby improving the reliability of the whole machine operation of the dehumidifier in the refrigerant leakage state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dehumidifiers, in particular to a dehumidifier. BACKGROUND

[0002] The structure of the dehumidifier comprises a refrigeration system, a cabinet system, a fan system and an electric control system. The refrigeration system circulates as follows: the refrigerant enters the compressor to be compressed into high-temperature and high-pressure refrigerant vapor, then is condensed and heat-released into high-temperature and high-pressure refrigerant liquid in the condenser, becomes low-temperature and low-pressure refrigerant liquid (or two-phase) after the adiabatic throttling process via the throttling component, and finally enters the evaporator to be evaporated and heat-absorbed into low-temperature and low-pressure refrigerant vapor to flow back to the compressor, and so on.

[0003] Based on the above refrigeration system, the air dehumidification process of the dehumidifier is as follows: the fan draws indoor air into the upper housing of the dehumidifier through the air inlet, and the indoor air is cooled and dehumidified into low-temperature saturated wet air in the evaporator, and then the low-temperature saturated wet air is heated and dehumidified into dry and medium-temperature gas through the condenser, and then is discharged into the indoor environment.

[0004] In the related art, the refrigerant leakage protection mode of a household dehumidifier is generally triggered only when the refrigerant leakage rate exceeds 50% or more, and the dehumidifier still operates normally when the refrigerant leakage rate is between 0 and 50%. However, as the amount of refrigerant decreases, the internal overheating of the evaporator of the dehumidifier begins to deteriorate. For example, when the refrigerant leakage rate is 0%, the superheat degree of the evaporator is -1-2℃; when the refrigerant leakage rate is 30%, the superheat degree of the evaporator is 13-18℃. In addition, as the refrigerant leakage rate increases, the discharge temperature of the compressor also increases significantly. When the refrigerant leakage rate is 30%, the discharge temperature of the compressor is nearly 25℃ higher than when the refrigerant leakage rate is 0%. When the compressor is in a long-term operation state at a high discharge temperature, the reliability of the compressor is seriously affected, thereby further affecting the reliability of the dehumidifier. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a dehumidifier which can effectively reduce the superheat degree of the evaporator, thereby reducing the discharge temperature of the compressor and improving the reliability of the entire dehumidifier in a refrigerant leakage state.

[0006] A dehumidifier according to an embodiment of the present invention includes: a refrigerant circulating in a refrigerant circuit in a refrigeration cycle, comprising a compressor, a condenser, a throttling device, and an evaporator, wherein the evaporator and the condenser are spaced apart to define an airflow passage between the evaporator and the condenser; an auxiliary baffle swayably disposed at the inlet of the airflow passage for controlling the opening angle of the inlet of the airflow passage; a second temperature sensor for detecting the coil temperature of the evaporator; and a third temperature sensor for detecting the indoor ambient temperature.

[0007] The controller is configured to:

[0008] When the dehumidifier is started and running, the compressor is controlled to run so that the refrigerant in the compressor flows to the condenser. The refrigerant outflow rate from the compressor and the refrigerant return flow rate are detected to determine the refrigerant leakage rate.

[0009] Determine whether the refrigerant leakage rate has reached a predetermined threshold;

[0010] When the refrigerant leakage rate reaches the predetermined threshold, the auxiliary baffle is controlled to swing to close the inlet of the air flow channel, and the dehumidifier enters the refrigerant leakage protection program.

[0011] When the refrigerant leakage rate does not reach the predetermined threshold, the swing angle of the auxiliary baffle is adjusted according to the refrigerant leakage rate;

[0012] The controller is further configured to:

[0013] The second temperature sensor is used to detect the coil temperature T of the evaporator at time t1. evap-1 The indoor ambient temperature T at time t1 is detected using the third temperature sensor. in-1 The first temperature difference δ1=T is obtained. in_1 -T evap_1 ;

[0014] Determine whether the compressor has been running continuously for a second duration;

[0015] When the compressor runs continuously for the second duration, the second temperature sensor is used to detect the coil temperature T of the evaporator at time t2. evap-2 The indoor ambient temperature T at time t2 is detected using the third temperature sensor. in-2 The second temperature difference δ2=T is obtained. in_2 -T evap_2 ;

[0016] determining whether the absolute values of the first temperature difference and the second temperature difference reach a predetermined temperature difference threshold value;

[0017] if the absolute values of the first temperature difference and the second temperature difference reach the predetermined temperature difference threshold value, the auxiliary baffle closes the inlet of the air flow channel;

[0018] if the absolute values of the first temperature difference and the second temperature difference do not reach the predetermined temperature difference threshold value, determining whether a refrigerant leakage rate reaches the predetermined threshold value;

[0019] when the compressor does not continuously operate for the second time length, continuously determining whether the compressor continuously operates for the second time length.

[0020] According to the dehumidifier of the embodiment of the present application, the auxiliary baffle is arranged at the inlet of the air flow channel defined between the evaporator and the condenser, and the controller is configured to control the swing angle of the auxiliary baffle according to the refrigerant leakage rate. Thus, compared with the conventional dehumidifier, when the dehumidifier operates in the refrigerant leakage state, the superheat degree of the evaporator can be effectively reduced, and the discharge temperature of the compressor can be reduced, thereby improving the reliability of the whole machine operation of the dehumidifier in the refrigerant leakage state.

[0021] According to some embodiments of the present application, the dehumidifier further comprises a first temperature sensor for detecting the discharge temperature of the compressor; after the swing angle of the auxiliary baffle is adjusted according to the refrigerant leakage rate, the controller is further configured to detect the discharge temperature of the compressor by using the first temperature sensor, and determine whether the discharge temperature of the compressor reaches a preset temperature threshold value; when the discharge temperature of the compressor reaches the preset temperature threshold value, the dehumidifier starts a compressor overheating protection program; when the discharge temperature of the compressor does not reach the preset temperature threshold value, it is determined again whether the refrigerant leakage rate reaches the predetermined threshold value.

[0022] According to some embodiments of the present application, after the dehumidifier starts the compressor overheating protection program, the controller is further configured to determine whether the discharge temperature of the compressor reaches the preset temperature threshold value; when the discharge temperature of the compressor reaches the preset temperature threshold value, the dehumidifier performs an abnormal operation alarm; when the discharge temperature of the compressor does not reach the preset temperature threshold value, it is determined again whether the refrigerant leakage rate reaches the predetermined threshold value.

[0023] According to some embodiments of the present application, before the judging whether the discharge temperature of the compressor reaches the preset temperature threshold, the controller is further configured to: judge whether the compressor continuously operates for a first time length; if the result of the judgment is yes, judge whether the discharge temperature of the compressor reaches the preset temperature threshold; if the result of the judgment is no, continue to judge whether the compressor continuously operates for the first time length.

[0024] According to some embodiments of the present application, the dehumidifier further comprises: a fan for sucking air in the indoor environment and sequentially flowing through the evaporator and the condenser; and the adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate when the refrigerant leakage rate does not reach the predetermined threshold comprises: judging whether the current rotating speed of the fan is a high rotating speed; if the current rotating speed of the fan is the high rotating speed, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate and the current rotating speed of the fan; if the current rotating speed of the fan is not the high rotating speed, judging whether the current rotating speed of the fan is a medium rotating speed; if the current rotating speed of the fan is the medium rotating speed, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate and the current rotating speed of the fan; if the current rotating speed of the fan is not the medium rotating speed, judging whether the current rotating speed of the fan is a low rotating speed; and if the current rotating speed of the fan is the low rotating speed, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate and the current rotating speed of the fan.

[0025] According to some embodiments of the present application, when the refrigerant is R410A refrigerant, the predetermined temperature difference threshold is any value between 10℃ and 15℃; and when the refrigerant is R32 refrigerant, the predetermined temperature difference threshold is any value between 5℃ and 10℃.

[0026] According to some embodiments of the present application, before the judging whether the refrigerant leakage rate reaches the predetermined threshold, the controller is further configured to: judge whether the compressor continuously operates for a third time length; if the result of the judgment is yes, judge whether the refrigerant leakage rate reaches the predetermined threshold; and if the result of the judgment is no, continue to judge whether the compressor continuously operates for the third time length.

[0027] According to some embodiments of the present application, the controller is further configured to: after the judging whether the dehumidifier enters the refrigerant leakage protection program, judge whether the dehumidifier exits the refrigerant leakage protection program; if the dehumidifier exits the refrigerant leakage protection program, judge whether the dehumidifier enters a shutdown mode; if the dehumidifier enters the shutdown mode, control the auxiliary baffle to close the inlet of the air flow channel; and if the dehumidifier does not enter the shutdown mode, judge whether the refrigerant leakage rate reaches the predetermined threshold.

[0028] According to some embodiments of the present application, the predetermined threshold is 50%.

[0029] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, in which:

[0031] Figure 1 is a schematic view of a dehumidifier according to an embodiment of the present application;

[0032] Figure 2 is a schematic view of a dehumidifier according to an embodiment of the present application;

[0033] Figure 3 is a schematic view of a dehumidifier according to an embodiment of the present application, wherein the housing is not shown;

[0034] Figure 4 is Figure 3 an enlarged view of portion A shown in circle in FIG. 1;

[0035] Figure 5 is Figure 3 a schematic view of the auxiliary baffle, the stepping motor and the side baffle of the dehumidifier shown in FIG. 1;

[0036] Figure 6 is Figure 5 an enlarged view of portion B shown in circle in FIG. 1;

[0037] Figure 7 is a flowchart of a controller of a dehumidifier according to an embodiment of the present application;

[0038] Figure 8 is a flowchart of a controller of a dehumidifier according to another embodiment of the present application;

[0039] Figure 9 is a flowchart of a controller of a dehumidifier according to still another embodiment of the present application.

[0040] REFERENCE NUMERALS:

[0041] 100: dehumidifier;

[0042] 1: compressor; 2: condenser; 3: evaporator; 4: air flow passage; 5: auxiliary baffle;

[0043] 6: controller; 61: processing module; 62: storage module; 7: first temperature sensor;

[0044] 8: Second temperature sensor; 9: Stepper motor; 10: Side baffle; 11: Housing; 111: Air inlet;

[0045] 12: Fan. Detailed Implementation

[0046] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-9 A dehumidifier 100 according to an embodiment of the present invention is described.

[0047] like Figures 1-9 As shown, the dehumidifier 100 according to an embodiment of the present invention includes a compressor 1, a condenser 2, a throttling device, an evaporator 3, an auxiliary baffle 5, and a controller 6.

[0048] Specifically, the refrigerant circulates in a refrigerant loop in the refrigeration cycle, consisting of compressor 1, condenser 2, throttling device, and evaporator 3. Evaporator 3 and condenser 2 are spaced apart to define an airflow passage 4 between them. An auxiliary baffle 5 is pivotally positioned at the inlet of the airflow passage 4 to control the opening angle of the inlet.

[0049] For example, in Figures 1-6 In the example, the dehumidifier 100 also includes a housing 11, within which an evaporator 3, a condenser 2, a throttling device, and a compressor 1 are all housed. The housing 11 has an air inlet 111 and an air outlet. The evaporator 3 is opposite to the air inlet 111, and the condenser 2 is located on the side of the evaporator 3 furthest from the air inlet 111. The evaporator 3 absorbs heat from the low-temperature, low-pressure refrigerant liquid flowing from the throttling device, converting it into a low-temperature, low-pressure refrigerant gas, and dehumidifies and cools the indoor air passing over the evaporator 3. The condenser 2 cools and depressurizes the high-temperature, high-pressure refrigerant gas discharged from the compressor 1, converting it into a medium-temperature, medium-pressure refrigerant liquid.

[0050] Controller 6 is configured as follows:

[0051] S1. When the dehumidifier 100 starts running, it controls the compressor 1 to run so that the refrigerant in the compressor 1 flows to the condenser 2. It detects the refrigerant outflow rate from the compressor 1 and the refrigerant return flow rate to the compressor 1 to determine the refrigerant leakage rate.

[0052] S2. Determine whether the refrigerant leakage rate has reached a predetermined threshold, where the predetermined threshold can be 50%.

[0053] S3. When the refrigerant leakage rate reaches the predetermined threshold, the auxiliary baffle 5 is controlled to swing to close the entrance of the air flow channel, and the dehumidifier 100 enters the refrigerant leakage protection program.

[0054] S4, when the refrigerant leakage rate does not reach the predetermined threshold, adjusting the swing angle of the auxiliary baffle 5 according to the refrigerant leakage rate.

[0055] In combination Figure 2 The controller 6 can include a storage module 62 and a processing module 61, the storage module 62 is in communication connection with the processing module 61, the storage module 62 is used to store the swing angle of the auxiliary baffle 5 under different refrigerant leakage rates. The processing module 61 is used to obtain the refrigerant leakage rate in the dehumidifier 100 in real time, and according to the obtained refrigerant leakage rate, the swing angle of the auxiliary baffle 5 corresponding to the refrigerant leakage rate is retrieved from the storage module 62, and the swing angle is transmitted to the stepper motor 9, so that the auxiliary baffle 5 is adjusted to the corresponding swing angle, so as to adjust the air flow through the evaporator 3.

[0056] Specifically, referring to Figures 7-9 When the dehumidifier 100 leaks refrigerant, the refrigerant leakage rate of the dehumidifier 100 at a certain time can be effectively determined through step S1, and when the refrigerant leakage rate is greater than the predetermined threshold, that is, the refrigerant leakage rate of the dehumidifier 100 is high at this time, the controller 6 controls the stepper motor 9 to close the inlet of the air flow channel, and at the same time, the dehumidifier 100 automatically adjusts to the refrigerant leakage protection program, and the compressor 1 reduces the operating frequency at this time; When the refrigerant leakage rate is less than or equal to the predetermined threshold, although the dehumidifier 100 is in a refrigerant leakage state at this time, the amount of leaked refrigerant is small, and the dehumidifier 100 can still operate normally. The detected refrigerant leakage rate is transmitted to the processing module 61, the processing module 61 can retrieve the swing angle of the auxiliary baffle 5 corresponding to the corresponding refrigerant leakage rate from the storage module 62, and the swing angle is transmitted to the stepper motor 9. The stepper motor 9 drives the auxiliary baffle 5 to swing by the swing angle, and part of the air flowing into the shell through the air inlet 111 flows to the condenser 2 through the evaporator 3, and the other part flows directly to the condenser 2 through the inlet of the air flow channel. The condenser 2 can heat the air flowing to it to remove the moisture in the air. While ensuring the dehumidification effect of the dehumidifier 100, through the above steps S3 and S4, the air flow to the evaporator 3 can be reduced, thereby effectively reducing the superheat of the evaporator 3, and further reducing the exhaust temperature of the compressor 1, thereby improving the reliability of the whole machine operation of the dehumidifier 100 in the refrigerant leakage state.

[0057] According to the dehumidifier 100 of the embodiment of the application, the auxiliary baffle 5 is arranged at the inlet of the air flow channel 4 between the evaporator 3 and the condenser 2, and the controller 6 is configured to control the swing angle of the auxiliary baffle 5 according to the refrigerant leakage rate. Thus, compared with the conventional dehumidifier, when the dehumidifier 100 operates in a refrigerant leakage state, the superheat of the evaporator 3 can be effectively reduced, thereby the exhaust temperature of the compressor 1 can be reduced, and the reliability of the whole machine operation of the dehumidifier 100 in the refrigerant leakage state can be improved.

[0058] According to some embodiments of the present application, the dehumidifier 100 further comprises a first temperature sensor 7 for detecting the discharge temperature of the compressor 1.

[0059] After adjusting the swing angle of the auxiliary baffle 5 according to the refrigerant leakage rate, the controller 6 is further configured to:

[0060] S5, the first temperature sensor 7 is used to detect the discharge temperature of the compressor 1, and it is judged whether the discharge temperature of the compressor 1 reaches the preset temperature threshold. Through this step, it can be effectively judged whether the discharge temperature of the compressor 1 is higher or lower than the preset temperature threshold pre-stored in the controller 6 when the dehumidifier 100 is running in the refrigerant leakage state. That is to say, when the dehumidifier 100 is running in the refrigerant leakage state, whether the discharge temperature of the compressor 1 rises.

[0061] S6, when the discharge temperature of the compressor 1 reaches the preset temperature threshold, the dehumidifier 100 starts the overheat protection program of the compressor 1. At this time, when the dehumidifier 100 is running in the refrigerant leakage state, the discharge temperature of the compressor 1 rises, in other words, the overheat degree of the evaporator 3 is increasing, indicating that the refrigerant leakage rate is increasing, and the reliability of the compressor 1 is affected. By making the compressor 1 enter the overheat protection program, the compressor 1 can be protected to avoid damage.

[0062] S7, when the discharge temperature of the compressor 1 does not reach the preset temperature threshold, it is re-judged whether the refrigerant leakage rate reaches the predetermined threshold. At this time, when the dehumidifier 100 is running in the refrigerant leakage state, the discharge temperature of the compressor 1 may be equal to the discharge temperature detected last time, or it may be lower than the discharge temperature detected last time, indicating that the refrigerant leakage rate does not increase with the running time of the dehumidifier 100. The refrigerant leakage rate needs to be continuously detected and judged whether it reaches the predetermined threshold, so that when the refrigerant leakage rate is greater than the preset threshold, the dehumidifier 100 can enter the refrigerant leakage protection program or the compressor 1 can enter the overheat protection program in time, avoiding damage to the compressor 1.

[0063] Further, after the dehumidifier 100 starts the overheat protection program of the compressor 1, the controller 6 is further configured to:

[0064] S8, judge whether the discharge temperature of the compressor 1 reaches the preset temperature threshold;

[0065] S9, when the discharge temperature of the compressor 1 reaches the preset temperature threshold, the dehumidifier 100 executes the abnormal running alarm;

[0066] S10, when the discharge temperature of the compressor 1 does not reach the preset temperature threshold, it is re-judged whether the refrigerant leakage rate reaches the predetermined threshold.

[0067] When the compressor 1 enters the overheat protection program, the compressor 1 is still in operation, and at this time, it can be effectively judged whether the exhaust temperature of the compressor 1 changes when the compressor 1 is running after entering the overheat protection program through step S8. When the exhaust temperature of the compressor 1 rises to the preset temperature threshold, it indicates that the refrigerant leakage rate of the compressor 1 is gradually increasing, and at this time, the dehumidifier 100 performs an abnormal operation alarm to remind the user to turn off the dehumidifier 100 in time and maintain the dehumidifier 100; when the exhaust temperature of the compressor 1 does not rise to the preset temperature threshold, it indicates that the compressor 1 can continue to be used, but the refrigerant leakage rate of the compressor 1 may increase with the running time of the dehumidifier 100, so that the refrigerant leakage rate needs to be detected in real time through step 10 to avoid that the dehumidifier 100 cannot take timely protection measures when the refrigerant leakage rate exceeds the predetermined threshold. Therefore, through steps S8-S10, while ensuring that the dehumidifier 100 can dehumidify in the refrigerant leakage state, the refrigerant leakage rate can be monitored in real time so that the dehumidifier 100 can start the protection program in time.

[0068] According to some embodiments of the present application, before judging whether the exhaust temperature of the compressor 1 reaches the preset temperature threshold, the controller 6 is further configured to:

[0069] S0, judge whether the compressor 1 is continuously running for a first time length;

[0070] If the judgment result is yes, judge whether the exhaust temperature of the compressor 1 reaches the preset temperature threshold;

[0071] If the judgment result is no, continue to judge whether the compressor 1 is continuously running for a first time length.

[0072] When the compressor 1 continuously runs for a period of time, the exhaust temperature of the compressor 1 will change, and through the above step S0, it can be effectively judged whether the exhaust temperature of the compressor 1 rises after the compressor 1 continuously runs for the first time length, so as to take corresponding measures on the compressor 1 according to the exhaust temperature of the compressor 1 subsequently.

[0073] According to some embodiments of the present application, the dehumidifier 100 further comprises a fan 12 for inhaling air in the indoor environment and sequentially flowing through the evaporator 3 and the condenser 2.

[0074] When the refrigerant leakage rate does not reach the predetermined threshold, the swing angle of the auxiliary baffle 5 is adjusted according to the refrigerant leakage rate, specifically including:

[0075] S41, judge whether the current speed of the fan 12 is a high wind speed;

[0076] S42, if the current speed of the fan 12 is a high wind speed, adjust the swing angle X1 of the auxiliary baffle 5 according to the refrigerant leakage rate and the current speed of the fan 12.

[0077] S43, if the current rotation speed of the fan 12 is not the high rotation speed, determining whether the current rotation speed of the fan 12 is the medium rotation speed;

[0078] S44, if the current rotation speed of the fan 12 is the medium rotation speed, adjusting the swing angle X2 of the auxiliary baffle 5 according to the refrigerant leakage rate and the current rotation speed of the fan 12;

[0079] S45, if the current rotation speed of the fan 12 is not the medium rotation speed, determining whether the current rotation speed of the fan 12 is the low rotation speed;

[0080] S46, if the current rotation speed of the fan 12 is the low rotation speed, adjusting the swing angle X3 of the auxiliary baffle 5 according to the refrigerant leakage rate and the current rotation speed of the fan 12.

[0081] When the fan 12 operates at different rotation speeds, the air flow rate flowing into the evaporator 3 through the air inlet 111 is also different. Therefore, through the above steps S41-S46, the rotation speed of the fan 12 can be associated with the swing angle of the auxiliary baffle 5, so that the fan 12 can ensure the air flow rate flowing to the air flow channel 4 at different rotation speeds, thereby improving the accuracy of control and further improving the operation reliability of the dehumidifier 100 in the refrigerant leakage state.

[0082] According to some embodiments of the present application, the dehumidifier 100 further comprises a second temperature sensor 8 and a third temperature sensor. The second temperature sensor 8 is used to detect the coil temperature of the evaporator 3, and the third temperature sensor is used to detect the indoor environment temperature. The second temperature sensor 8 can be arranged on the temperature sensing seat of the evaporator 3 to ensure that the second temperature sensor 8 can accurately detect the coil temperature of the evaporator 3. The third temperature sensor can be arranged on the windward surface of the evaporator 3, so that the air flow flowing to the evaporator 3 through the air inlet 111 can first flow through the third temperature sensor, thereby accurately detecting the indoor environment temperature.

[0083] The controller 6 is further configured to:

[0084] SO', detecting the coil temperature T of the evaporator 3 at t1 by using the second temperature sensor 8 evap-1 , detecting the indoor environment temperature T at t1 by using the third temperature sensor in-1 , obtaining a first temperature difference δ1=T in_1 -T evap_1 ;

[0085] S1', determining whether the compressor 1 is continuously operated for a second time length;

[0086] S2', when the compressor 1 is continuously operated for the second time length, detecting the coil temperature T of the evaporator 3 at t2 by using the second temperature sensor 8evap-2 detecting the indoor environment temperature T at the time t2 by using the third temperature sensor in-2 obtaining a second temperature difference δ2=T in_2 -T evap_2 .

[0087] When the dehumidifier 100 is running in the refrigerant leakage state, the refrigerant leakage rate is different, and the superheat degree of the evaporator 3 is also different. The higher the refrigerant leakage rate is, the higher the superheat degree of the evaporator 3 is. Through the above steps SO'-S2', the temperature difference between the coil temperature of the evaporator 3 and the indoor environment temperature (i.e. the first temperature difference and the second temperature difference) at two different times can be effectively detected, so that the superheat degree of the evaporator 3 can be indirectly obtained, so as to take effective protection measures according to the superheat degree of the evaporator 3 subsequently.

[0088] S3', judging whether the absolute values of the first temperature difference and the second temperature difference reach a predetermined temperature difference threshold value;

[0089] S4', if the absolute values of the first temperature difference and the second temperature difference reach the predetermined temperature difference threshold value, the auxiliary baffle 5 closes the inlet of the air flow channel. Thus, it can be indirectly indicated that the superheat degree of the evaporator 3 is high, that is, the refrigerant leakage rate is high. At this time, the temperature of the condenser 2 is low, and all the air flowing to the condenser 2 cannot be heated into dry air. Closing the inlet of the air flow channel can reduce the air flow to the condenser 2, so as to ensure that as much air as possible flowing to the condenser 2 is heated into dry air, and ensure the dehumidification effect of the dehumidifier 100.

[0090] S1, if the absolute values of the first temperature difference and the second temperature difference do not reach the predetermined temperature difference threshold value, judging whether the refrigerant leakage rate reaches a predetermined threshold value. That is, although the superheat degree of the evaporator 3 is higher than that when there is no refrigerant leakage, the refrigerant leakage rate is low at this time, and the dehumidifier 100 can still work normally without affecting the reliability of the operation of the compressor 1 and the dehumidifier 100.

[0091] When the compressor 1 does not continuously run for the second time length, it is continuously judged whether the compressor 1 continuously runs for the second time length. That is, after the compressor 1 continuously runs for the second time length, the coil temperature of the evaporator 3 and the indoor environment temperature are detected to obtain the second temperature difference, so as to ensure the accuracy of the detected data

[0092] In some optional embodiments, when the refrigerant is R410A refrigerant, the predetermined temperature difference threshold value is any value between 10℃ and 15℃.

[0093] When the refrigerant is R32 refrigerant, the predetermined temperature difference threshold value is any value between 5℃ and 10℃.

[0094] According to some embodiments of the present application, before determining whether the refrigerant leakage rate reaches the predetermined threshold, the controller 6 is further configured to:

[0095] S0'', determining whether the compressor 1 continuously operates for a third time length;

[0096] If the determination result is yes, determining whether the refrigerant leakage rate reaches the predetermined threshold;

[0097] If the determination result is no, continuing to determine whether the compressor 1 continuously operates for the third time length.

[0098] When the dehumidifier 100 is running for a period of time before detecting the refrigerant leakage rate, that is, when the dehumidifier 100 is running stably before a series of detections are performed, the accuracy of the detection data is ensured, so that the actual running state of the dehumidifier 100 can be accurately determined. Alternatively, the third time length is any value between 20 minutes and 40 minutes.

[0099] The controller 6 is further configured to:

[0100] After determining whether the dehumidifier 100 enters the refrigerant leakage protection program,

[0101] S11, determining whether the dehumidifier 100 exits the refrigerant leakage protection program;

[0102] S12, if the dehumidifier 100 exits the refrigerant leakage protection program, determining whether the dehumidifier 100 enters the shutdown mode;

[0103] S13, if the dehumidifier 100 enters the shutdown mode, controlling the auxiliary baffle 5 to close the inlet of the air flow channel 4;

[0104] If the dehumidifier 100 does not enter the shutdown mode, determining whether the refrigerant leakage rate reaches the predetermined threshold.

[0105] When the dehumidifier 100 exits the refrigerant leakage protection program and enters the shutdown mode, the refrigerant leakage rate is high at this time, so as to be unable to guarantee the normal operation of the dehumidifier 100, and closing the dehumidifier 100 can better protect the dehumidifier 100 and avoid the damage of the motor of the compressor 1 caused by continuous operation. When the dehumidifier 100 exits the refrigerant leakage protection program and does not enter the shutdown mode, it is indicated that the detection that the refrigerant leakage rate is higher than the predetermined threshold may be inaccurate or the shutdown key fails to be successfully triggered, and it is necessary to compare the refrigerant leakage rate and the predetermined threshold again, so as to accurately determine the refrigerant leakage rate in the dehumidifier 100.

[0106] According to some embodiments of the present application, the top of the air flow channel 4 can be the inlet, and the auxiliary baffle 5 is swingably arranged between the top of the condenser 2 and the evaporator 3, and two side baffles are respectively arranged between the two sides of the condenser 2 and the evaporator 3. Referring to Figure 5 and Figure 6 One end of each of the two side baffles is connected to the two ends of the auxiliary baffle 5 in the length direction, and the other end of each of the two side baffles can be connected to the end plate of the evaporator 3 or the condenser 2 by buckling or screwing, to ensure the installation reliability of the two side baffles.

[0107] The length of the auxiliary baffle 5 should be greater than the distance between the two end plates of the evaporator 3 or the condenser 2, the width of the auxiliary baffle 5 should be equal to the distance between the condenser 2 and the evaporator 3, and the thickness of the auxiliary baffle 5 should meet the drop strength requirement of the product. The height of the side baffle should be higher than the height of the condenser 2 and the evaporator 3, the width of the side baffle should be equal to the distance between the condenser 2 and the evaporator 3, and the thickness of the side baffle should meet the drop strength requirement of the product. Optionally, the gap between the side baffle and the evaporator 3 or the condenser 2 can be sealed with sponge or other materials to avoid air leakage and affect the accuracy of air volume control.

[0108] Of course, the present application is not limited to this, and in some other embodiments of the present application, the side of the air flow channel 4 is the inlet, and the auxiliary baffle 5 is two, and the two auxiliary baffles 5 are respectively swingably arranged between the two sides of the condenser 2 and the evaporator 3, and the side baffle is arranged between the top of the condenser 2 and the evaporator 3. When the dehumidifier 100 is dehumidifying, the controller 6 can control the swing angle of at least one of the two auxiliary baffles 5 to adjust the opening degree of the opening, and at this time, part of the indoor air flowing into the dehumidifier 100 through the air inlet 111 flows to the side of the condenser 2, to ensure the air volume directly flowing to the condenser 2.

[0109] The other configurations and operations of the dehumidifier 100 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0110] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0111] In the description of the application, it is necessary to point out that, unless otherwise clearly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0112] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example.

[0113] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A dehumidifier, characterized in that, include: The refrigerant circulates in a refrigerant circuit in the refrigeration cycle, which consists of a compressor, a condenser, a throttling device, and an evaporator. The evaporator and the condenser are spaced apart to define an airflow passage between them. An auxiliary baffle is swayably disposed at the inlet of the airflow channel to control the opening angle of the inlet of the airflow channel. A second temperature sensor is used to detect the coil temperature of the evaporator. A third temperature sensor is used to detect the indoor ambient temperature. The controller is configured to: When the dehumidifier is started and running, the compressor is controlled to run so that the refrigerant in the compressor flows to the condenser. The refrigerant outflow rate from the compressor and the refrigerant return flow rate are detected to determine the refrigerant leakage rate. Determine whether the refrigerant leakage rate has reached a predetermined threshold; When the refrigerant leakage rate reaches the predetermined threshold, the auxiliary baffle is controlled to swing to close the inlet of the air flow channel, and the dehumidifier enters the refrigerant leakage protection program. When the refrigerant leakage rate does not reach the predetermined threshold, the swing angle of the auxiliary baffle is adjusted according to the refrigerant leakage rate; The controller is further configured to: The second temperature sensor is used to detect the coil temperature T of the evaporator at time t1. evap-1 The indoor ambient temperature T at time t1 is detected using the third temperature sensor. in-1 The first temperature difference δ1=T is obtained. in_1 -T evap_1 ; Determine whether the compressor has been running continuously for a second duration; When the compressor runs continuously for the second duration, the second temperature sensor is used to detect the coil temperature T of the evaporator at time t2. evap-2 The indoor ambient temperature T at time t2 is detected using the third temperature sensor. in-2 The second temperature difference δ2=T is obtained. in_2 -T evap_2 ; Determine whether the absolute values ​​of the first temperature difference and the second temperature difference reach a predetermined temperature difference threshold; If the absolute values ​​of the first temperature difference and the second temperature difference reach the predetermined temperature difference threshold, the auxiliary baffle closes the inlet of the airflow channel; If the absolute values ​​of the first temperature difference and the second temperature difference do not reach the predetermined temperature difference threshold, then it is determined whether the refrigerant leakage rate has reached the predetermined threshold. If the compressor does not run continuously for the second duration, then it continues to determine whether the compressor has run continuously for the second duration.

2. The dehumidifier according to claim 1, characterized in that, Further includes: A first temperature sensor is used to detect the exhaust temperature of the compressor; After adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate, the controller is further configured to: The first temperature sensor is used to detect the exhaust temperature of the compressor and to determine whether the exhaust temperature of the compressor reaches a preset temperature threshold. When the exhaust temperature of the compressor reaches the preset temperature threshold, the dehumidifier activates the compressor overheat protection program. If the compressor's exhaust temperature does not reach the preset temperature threshold, the refrigerant leakage rate is reassessed to determine whether it has reached the preset threshold.

3. The dehumidifier according to claim 2, characterized in that, After the dehumidifier activates the compressor overheat protection program, the controller is further configured to: Determine whether the exhaust temperature of the compressor reaches the preset temperature threshold. When the exhaust temperature of the compressor reaches the preset temperature threshold, the dehumidifier will trigger an abnormal operation alarm. If the compressor's exhaust temperature does not reach the preset temperature threshold, the refrigerant leakage rate is reassessed to determine whether it has reached the preset threshold.

4. The dehumidifier according to claim 2, characterized in that, Before determining whether the compressor's exhaust temperature reaches a preset temperature threshold, the controller is further configured to: Determine whether the compressor has been running continuously for a first duration; If the determination result is yes, then determine whether the exhaust temperature of the compressor has reached the preset temperature threshold. If the judgment result is negative, then continue to determine whether the compressor has been running continuously for a first duration.

5. The dehumidifier according to claim 1, characterized in that, Further includes: A fan is used to draw in air from the indoor environment and allow it to flow sequentially through the evaporator and the condenser; The step of adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate when the refrigerant leakage rate does not reach the predetermined threshold specifically includes: Determine whether the current fan speed is at a high wind speed; If the current fan speed is high, the swing angle of the auxiliary baffle is adjusted according to the refrigerant leakage rate and the current fan speed. If the current fan speed is not high wind speed, then determine whether the current fan speed is medium wind speed; If the current fan speed is medium, the swing angle of the auxiliary baffle is adjusted according to the refrigerant leakage rate and the current fan speed. If the current fan speed is not medium wind speed, then determine whether the current fan speed is low wind speed; If the current fan speed is low, the swing angle of the auxiliary baffle is adjusted according to the refrigerant leakage rate and the current fan speed.

6. The dehumidifier according to claim 1, characterized in that, When the refrigerant is R410A, the predetermined temperature difference threshold is any value between 10℃ and 15℃. When the refrigerant is R32, the predetermined temperature difference threshold is any value between 5℃ and 10℃.

7. The dehumidifier according to claim 1, characterized in that, Before determining whether the refrigerant leakage rate has reached a predetermined threshold, the controller is further configured to: Determine whether the compressor has been running continuously for a third duration; If the determination result is yes, then determine whether the refrigerant leakage rate has reached the predetermined threshold. If the judgment result is negative, then continue to determine whether the compressor has been running continuously for a third time.

8. The dehumidifier according to claim 1, characterized in that, The controller is further configured to: After determining whether the dehumidifier has entered the refrigerant leak protection procedure. Determine whether the dehumidifier has exited the refrigerant leak protection program; If the dehumidifier exits the refrigerant leak protection program, it is determined whether the dehumidifier has entered the shutdown mode; If the dehumidifier enters the shutdown mode, the auxiliary baffle is controlled to close the inlet of the air flow channel; If the dehumidifier does not enter the shutdown mode, it is determined whether the refrigerant leakage rate has reached the predetermined threshold.

9. The dehumidifier according to any one of claims 1-8, characterized in that, The predetermined threshold is 50%.

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