Dehumidifier and control method thereof

Abstract

The application provides a dehumidifier and a control method thereof. The control method comprises the following steps: starting the dehumidifier, and obtaining a dehumidification type of the dehumidifier; when the dehumidification type is cooling dehumidification, obtaining an outlet air temperature and an ambient temperature of the dehumidifier; adjusting an opening degree of a baffle according to a first difference value between the outlet air temperature and the ambient temperature, and switching a flow path switching valve group to a first use state. The application has the advantages that the active or passive switching of the dehumidifier between the cooling dehumidification and the heating dehumidification can be realized by adjusting the outlet air temperature, the dehumidification efficiency is ensured while the outlet air temperature is adjusted, the use experience of a user is improved, and the operation energy consumption of the dehumidifier and other indoor air conditioning equipment is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dehumidification drying, in particular to a dehumidifier and a control method thereof. BACKGROUND

[0002] Since the internal space of the shell of the existing dehumidifier is limited, the evaporator and the condenser are arranged in sequence from front to back, the air supply is first heat exchanged with the evaporator to reduce temperature and dehumidify, and then heat exchanged with the condenser to increase temperature, which results in that the air outlet temperature of the dehumidifier is often higher than the temperature of the operating environment, especially when operating in hot and humid seasons, which easily affects the comfort experience of the user and increases the operating energy consumption of other air conditioning equipment in the room.

[0003] In order to meet the user's demand, the existing technology provides a dehumidifier which uses the condensate water in the water tank of the dehumidifier as a water source to spray the condenser to reduce the surface temperature and pressure of the condenser, so as to reduce the air outlet temperature. However, the air outlet temperature reduction effect of the dehumidifier is limited by the state of the condensate water, and when the condensate water is insufficient or the condensate water is heated to have no cooling effect after multiple cycles, the cooling effect of the condensate water will be invalid, so the reliability is not high. SUMMARY

[0004] One object of the first aspect of the present application is to reasonably adjust the air outlet temperature of the dehumidifier when the dehumidifier performs temperature reduction and dehumidification, and to ensure the dehumidification efficiency.

[0005] One further object of the first aspect of the present application is to avoid frequent adjustment of the opening degree of the baffle when the air outlet temperature is changed.

[0006] One object of the second aspect of the present application is to provide a dehumidifier.

[0007] In particular, according to the first aspect of the present application, the present application provides a control method of a dehumidifier, the dehumidifier comprising a condenser, an evaporator, a water soaking pipe and a flow path switching valve group, a bypass air duct being formed above and / or below the condenser, a baffle being arranged in the bypass air duct to adjust the opening degree thereof, the water soaking pipe being soaked in condensate water, when the flow path switching valve group is switched to a first use state, the refrigerant flowing out of the condenser flows into the evaporator through the water soaking pipe, when the flow path switching valve group is switched to a second use state, the refrigerant flowing out of the condenser directly flows into the evaporator, and the control method comprises:

[0008] starting the dehumidifier, and obtaining the dehumidification type of the dehumidifier;

[0009] when the dehumidification type is temperature reduction and dehumidification, obtaining the air outlet temperature and the ambient temperature of the dehumidifier;

[0010] adjusting the opening degree of the baffle according to the first difference between the air outlet temperature and the ambient temperature, and switching the flow path switching valve group to the first use state.

[0011] Optionally, before the step of obtaining the outlet air temperature and the ambient temperature of the dehumidifier, the method further comprises:

[0012] determining whether the dehumidifier is running smoothly;

[0013] if yes, performing the step of obtaining the outlet air temperature and the ambient temperature of the dehumidifier.

[0014] Optionally, the step of determining whether the dehumidifier is running smoothly comprises:

[0015] periodically obtaining the outlet air temperature of the dehumidifier;

[0016] respectively calculating the difference between the outlet air temperatures obtained at adjacent times;

[0017] determining whether each of the differences is less than or equal to a preset difference value within a preset time period;

[0018] if yes, determining that the dehumidifier is running smoothly.

[0019] Optionally, after the step of switching the flow path switching valve group to the first use state, the method further comprises:

[0020] re-obtaining the outlet air temperature and the ambient temperature of the dehumidifier;

[0021] determining whether a second difference between the outlet air temperature and the ambient temperature falls within a preset temperature range;

[0022] if yes, maintaining the current opening degree of the baffle.

[0023] Optionally, after the step of switching the flow path switching valve group to the first use state and before the step of re-obtaining the outlet air temperature and the ambient temperature of the dehumidifier, the method further comprises:

[0024] re-determining whether the dehumidifier is running smoothly;

[0025] if yes, performing the step of re-obtaining the outlet air temperature and the ambient temperature of the dehumidifier.

[0026] Optionally, if the second difference does not fall within the preset temperature range, obtaining the current opening degree of the baffle;

[0027] determining whether the current opening degree of the baffle reaches an opening degree threshold;

[0028] if yes, outputting an alarm prompt.

[0029] Optionally, after the step of maintaining the current opening degree of the baffle, the method further comprises:

[0030] continuing to obtain the outlet air temperature and the ambient temperature of the dehumidifier;

[0031] determining whether a third difference between the outlet air temperature and the ambient temperature exceeds the preset temperature range;

[0032] If yes, the baffle is closed.

[0033] Optionally, when the dehumidification type is temperature-increasing dehumidification, the baffle is kept in the closed state.

[0034] The flow path switching valve group is kept in the second use state.

[0035] Optionally, if the dehumidification type of the dehumidifier is not obtained within a specified time period, the ambient temperature of the dehumidifier is obtained, and the dehumidification type of the dehumidifier is determined according to the ambient temperature.

[0036] According to a second aspect of the present application, the present application provides a dehumidifier, comprising:

[0037] a condenser, an evaporator, a bubble tube and a flow path switching valve group, a bypass air duct is formed above and / or below the condenser, a baffle is arranged in the bypass air duct to adjust the opening size thereof, the bubble tube is immersed in condensate water, in the first use state of the flow path switching valve group, the refrigerant flowing out of the condenser flows into the evaporator through the bubble tube, and in the second use state of the flow path switching valve group, the refrigerant flowing out of the condenser directly flows into the evaporator; and

[0038] a controller comprising a processor and a memory, the memory storing a machine executable program, the machine executable program being executed by the processor to implement any of the above control methods.

[0039] The control method of the dehumidifier of the present application adjusts the opening size of the baffle according to the first difference value between the outlet air temperature and the ambient temperature when the dehumidifier performs temperature-lowering dehumidification. The larger the first difference value, the larger the opening size of the baffle, which indicates that the outlet air temperature of the dehumidifier is significantly higher than the ambient temperature, and more dehumidified air after being cooled by the evaporator is needed to bypass to adjust the outlet air temperature, so that the dehumidifier reaches the comfortable air supply level. By switching the flow path switching valve group to the first use state, the refrigerant flowing out of the condenser can flow through the bubble tube, and the condensate water can be used to dissipate heat from the refrigerant in the bubble tube, thereby increasing the heat dissipation of the condenser when the air volume is reduced, and maintaining the dehumidification efficiency of the dehumidifier.

[0040] Further, the control method of the dehumidifier of the present application can further determine whether the dehumidifier is running smoothly before obtaining the outlet air temperature and the ambient temperature of the dehumidifier, and then obtain the outlet air temperature and the ambient temperature of the dehumidifier after the dehumidifier is running smoothly. It can be understood that when the dehumidifier is running smoothly, the outlet air temperature is relatively stable, and the first difference value calculated using the outlet air temperature and the ambient temperature obtained at this time can be more accurate, which can effectively avoid the problem of frequent adjustment of the opening size of the baffle due to unstable outlet air temperature, and is beneficial to ensuring the operation reliability and service life of the dehumidifier.

[0041] The above and other objects, advantages and features of the present application will become more apparent by describing in detail preferred embodiments thereof with reference to the attached drawings in which: BRIEF DESCRIPTION OF DRAWINGS

[0042] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference to the drawings. The drawings are for purposes of illustration only and are not intended to limit the present application thereto, as the present application can have application in environments beyond those shown or described. Like reference numerals are used to denote like elements throughout the accompanying drawings in which:

[0043] Figure 1 is a longitudinal sectional view of a dehumidifier in a heating dehumidification mode according to an embodiment of the present application;

[0044] Figure 2 is a longitudinal sectional view of a dehumidifier in a cooling dehumidification mode according to an embodiment of the present application;

[0045] Figure 3 is a transverse sectional view of a body of a dehumidifier according to an embodiment of the present application;

[0046] Figure 4 is a schematic diagram of an operation principle of a dehumidifier according to an embodiment of the present application;

[0047] Figure 5 is a schematic diagram of a refrigerant circulation principle of a dehumidifier in a heating dehumidification mode according to an embodiment of the present application;

[0048] Figure 6 is a schematic diagram of a refrigerant circulation principle of a dehumidifier in a cooling dehumidification mode according to an embodiment of the present application;

[0049] Figure 7 is a schematic diagram of a control method of a dehumidifier according to an embodiment of the present application;

[0050] Figure 8 is a flowchart of a control method of a dehumidifier according to an embodiment of the present application;

[0051] Figure 9 is a flowchart of a control method of a dehumidifier in a cooling dehumidification mode according to an embodiment of the present application;

[0052] Figure 10 is a block diagram of a structure of a dehumidifier according to an embodiment of the present application.

[0053] Reference signs: 10, dehumidifier; 100, body; 101, air inlet; 102, air outlet; 103, bypass air duct; 201, first flow path; 202, second flow path; 203, third flow path; 204, regulating valve; 205, one-way valve; 210, compressor; 220, condenser; 221, water bubble pipe; 230, evaporator; 240, fan; 250, heat exchanger tube plate; 260, water pan; 270, throttling device; 310, baffle; 320, motor; 310, processor; 320, memory; 321, machine executable program. DETAILED DESCRIPTION

[0054] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0055] The dehumidifier 10 generally includes a body 100, and the interior of the body 100 is provided with a compressor 210, a condenser 220, an evaporator 230, and a fan 240. The body 100 has an air inlet 101 and an air outlet 102, and the evaporator 230, the condenser 220, and the fan 240 are arranged in sequence in the direction from the air inlet 101 to the air outlet 102.

[0056] During dehumidification operation, the refrigerant discharged from the compressor 210 is first cooled in the condenser 220, then heated in the evaporator 230, and finally flows back to the compressor 210. At this time, the surface temperature of the evaporator 230 is lower than the ambient temperature, and the surface temperature of the condenser 220 is higher than the ambient temperature. Under the action of the fan 240, the temperature of the air flow decreases when passing through the evaporator 230, and the temperature increases to slightly higher than the ambient temperature when passing through the condenser 220 before being discharged.

[0057] As mentioned above, the outlet air temperature of the dehumidifier 10 is often higher than the ambient temperature, especially when operating in hot and humid seasons, which easily affects the user's comfort experience, and even causes the increase of the operating energy consumption of other indoor air conditioning equipment, increasing the user's cooling cost.

[0058] To solve the above problems, the present application provides a bypass air duct 103 above the condenser 220, and a baffle 310 is arranged in the bypass air duct 103, and the opening size of the bypass air duct 103 is adjusted by the baffle 310 to adjust the outlet air temperature.

[0059] Generally, the height of the condenser 220 is substantially the same as that of the evaporator 230 in the conventional dehumidifier 10, while in the dehumidifier 10 of the present application, the height of the condenser 220 is less than that of the evaporator 230. In this way, when the condenser 220 and the evaporator 230 are installed at the same height, the top of the condenser 220 and the top wall of the body 100 form the bypass air channel 103 as described above.

[0060] Figure 1 Fig. 3 is a longitudinal sectional view of the dehumidifier 10 in the heating dehumidification mode according to an embodiment of the present application, Figure 2 Fig. 4 is a longitudinal sectional view of the dehumidifier 10 in the cooling dehumidification mode according to an embodiment of the present application, wherein, Figure 1 Fig. 5 shows the closed state of the baffle 310, Figure 2 Fig. 6 shows the fully open state of the baffle 310.

[0061] Referring to Figure 1 and Figure 2 In the dehumidification operation, when the baffle 310 is in the open state, the air flow dehumidified by the evaporator 230 is divided into two parts, one part flows through the condenser 220 for heat exchange and temperature rise, and the other part flows through the bypass air channel 103 without heat exchange with the condenser 220, maintaining a low temperature state.

[0062] In this way, when the dehumidifier 10 performs the heating dehumidification mode, the opening of the baffle 310 can be controlled to be 0. When the dehumidifier 10 performs the cooling dehumidification mode, the opening of the baffle 310 can be reasonably adjusted according to the difference between the actual air outlet temperature and the ambient temperature under different operating conditions. That is, when the difference is large, the opening of the baffle 310 is increased, and when the difference is small, the opening of the baffle 310 is decreased.

[0063] It should be noted that, in order to form a relatively reasonable bypass air channel, the height ratio of the condenser 220 to the evaporator 230 can be limited to 0.6-0.8:1 under the premise that the heat exchange area of the condenser 220 is sufficient to ensure the heating dehumidification operation.

[0064] It should be noted that the above embodiments are described with the bypass air channel 103 located above the condenser 220, and in some other embodiments, the condenser 220 can be raised to a certain height so that the top of the condenser 220 is flush with the top of the evaporator 230, thereby forming the bypass air channel 103 below the condenser 220. Alternatively, the condenser 220 can be raised to a certain height so that the bypass air channel 103 is formed above and below the condenser 220, i.e., the bypass air channel 103 is formed between the top of the condenser 220 and the top wall of the body 100, and the bypass air channel 103 is also formed between the bottom of the condenser 220 and the bottom wall of the body 100.

[0065] In an alternative embodiment of the present application, the fan 240 can be a centrifugal fan 240, the air inlet 101 can be formed at the rear side of the body 100, and the air outlet 102 can be formed at the top of the body 100, i.e. the air supply mode of side air inlet-top air outlet.

[0066] In another alternative embodiment of the present application, the fan 240 can also be an axial fan 240, the air inlet 101 can be formed at the rear side of the body 100, and the air outlet 102 can be formed at the front side of the body 100, i.e. the air supply mode of side air inlet-side air outlet.

[0067] In this way, whether the centrifugal fan 240 is used in the air supply mode of side air inlet-top air outlet or the axial fan 240 is used in the air supply mode of side air inlet-side air outlet, the proportion of hot air in the airflow blown out by the dehumidifier 10 can be reduced, the outlet air temperature can be lowered, and the cold air and the hot air mixed by the fan 240 have been dehumidified by the evaporator 230, so there is no risk of condensation during the mixing process.

[0068] Figure 3 is a transverse sectional view of the body 100 of the dehumidifier 10 according to an embodiment of the present application, with reference to Figure 3 The dehumidifier 10 further comprises two heat exchanger tube plates 250, which can be rectangular plates of the same size and are arranged opposite to the two sides of the condenser 220 and the evaporator 230. The two heat exchanger tube plates 250 mainly serve the purpose of sealing to prevent the airflow dehumidified by the evaporator 230 from bypassing the condenser 220 and being blown out directly from the two sides of the condenser 220.

[0069] The size of the baffle 310 is comparable to the cross-sectional size of the bypass air duct 103, and the opening size of the bypass air duct 103 can be adjusted by rotating or lifting the baffle 310.

[0070] In the embodiment shown in the drawings of the present application, the baffle 310 is adjusted by rotating. The upper end of the baffle 310 is connected to a motor 320, the rotating shaft of the motor 320 is arranged horizontally, and the motor 320 is configured to drive the baffle 310 to rotate back and forth along the air inlet direction of the body 100 under control. When the baffle 310 is rotated to the closed state, the plate surface of the baffle 310 is parallel to the front and rear side walls of the body 100, and when the baffle 310 is rotated to the fully open state, the plate surface of the baffle 310 is parallel to the upper and lower side walls of the body 100.

[0071] Alternatively, the rotating shaft of the motor 320 is arranged vertically, and the motor 320 is configured to drive the baffle 310 to rotate along the vertical axis under control. In this way, when the baffle 310 is rotated to the closed state, the plate surface of the baffle 310 is parallel to the front and rear side walls of the body 100, and when the baffle 310 is rotated to the fully open state, the plate surface of the baffle 310 is parallel to the left and right side walls of the body 100, i.e. the plate surface is along the air supply direction.

[0072] In some other embodiments, the damper 310 is adjusted in a lifting manner to adjust the opening size of the bypass air duct 103. For example, a cylinder is arranged on the top of the body 100, and a piston rod of the cylinder is arranged vertically downward and connected with the upper end of the damper 310. When the piston rod pulls the damper 310 upward as a whole, the damper 310 completely opens the bypass air duct 103. When the piston rod pushes the damper 310 downward as a whole, the damper 310 completely closes the bypass air duct 103. Alternatively, the lifting of the damper 310 can also be realized by other components with reciprocating motion function, such as a linear motor 320.

[0073] Considering that the opening size of the damper 310 is greater than 0 and the bypass air volume is greater than 0 when the dehumidifier 10 executes the cooling dehumidification mode, and the air supply volume of the dehumidifier 10 is fixed, this will result in that the air volume of the condenser 220 is less than that when the opening size of the damper 310 is 0, and the heat dissipation amount of the condenser 220 is reduced, and the dehumidification efficiency of the dehumidifier 10 is reduced.

[0074] Therefore, the dehumidifier 10 of the present application is additionally provided with a water-soaking pipe 221 to increase the heat dissipation amount of the condenser 220 when the air volume is reduced, and to ensure the dehumidification efficiency of the dehumidifier 10.

[0075] Figure 4 is a running principle diagram of the dehumidifier 10 according to an embodiment of the present application, Figure 5 is a refrigerant circulation principle diagram of the dehumidifier 10 in the heating dehumidification mode according to an embodiment of the present application, Figure 6 is a refrigerant circulation principle diagram of the dehumidifier 10 in the cooling dehumidification mode according to an embodiment of the present application.

[0076] Referring to Figure 4 to Figure 6 The water-soaking pipe 221 is arranged between the condenser 220 and the evaporator 230 of the dehumidifier 10, and is soaked in the water collecting tray 260 of the dehumidifier 10. When the cooling dehumidification mode is executed, the refrigerant flowing out of the condenser 220 first flows through the water-soaking pipe 221 and then flows into the evaporator 230. In this way, the condensed water stored in the water collecting tray 260 can water-cool the refrigerant in the water-soaking pipe 221, so as to increase the heat dissipation amount of the condenser 220 when the air volume is reduced, and to realize the reduction of the air outlet temperature while ensuring the dehumidification efficiency.

[0077] It should be noted that the water-soaking pipe 221 can be regarded as a part of the condenser 220, and is a heat exchange coil arranged in the water collecting tray 260 of the dehumidifier 10. The water-soaking pipe 221 can be immersed in the condensed water by reasonably designing the drainage opening of the water collecting tray 260, such as arranging the drainage opening at the upper edge position adjacent to the side wall of the water collecting tray 260. Since the temperature of the condensed water generated by the dehumidifier 10 is lower than the ambient temperature, the water-soaking pipe 221 has good heat dissipation effect for the condenser 220.

[0078] Further, the dehumidifier 10 can further include a flow path switching valve set, which can be controlled to make the refrigerant flowing out of the condenser 220 flow through the water-wetted tube 221 first and then flow into the evaporator 230, or directly flow into the evaporator 230.

[0079] In this way, when the heating dehumidification mode is executed, the damper 310 can be placed in the closed state, the opening degree of the damper 310 is 0, the bypass air volume is 0, and the refrigerant flowing out of the condenser 220 is controlled by the flow path switching valve set to directly flow into the evaporator 230. When the cooling dehumidification mode is executed, the damper 310 can be placed in the open state, the opening degree of the damper 310 is greater than 0, the bypass air volume is greater than 0, and the refrigerant flowing out of the condenser 220 is controlled by the flow path switching valve set to flow through the water-wetted tube 221 first and then flow into the evaporator 230.

[0080] In this way, the dehumidifier 10 can be freely switched between the heating dehumidification mode and the cooling dehumidification mode, the dehumidification capacity when the outlet air temperature changes is guaranteed, the functional diversity of the dehumidifier 10 is improved, the user's use comfort is improved, the user's use experience is improved, the indoor environment comfort is effectively avoided to be reduced due to the operation of the dehumidifier 10, and even the energy consumption of other air conditioning equipment is increased, and the cost expenditure of the user is saved.

[0081] The outlet of the condenser 220 and the inlet of the water-wetted tube 221 have a first flow path 201, the outlet of the water-wetted tube 221 and the inlet of the evaporator 230 have a second flow path 202, and the first flow path 201 and the second flow path 202 have a third flow path 203.

[0082] The flow path switching valve set can include a regulating valve 204 and a one-way valve 205, the regulating valve 204 is arranged at the connection between the first flow path 201 and the third flow path 203, and the one-way valve 205 is arranged upstream of the connection between the second flow path 202 and the third flow path 203, that is, at the position adjacent to the outlet of the water-wetted tube 221.

[0083] Specifically, the regulating valve 204 has a, b, and c three interfaces, the interface a is connected with the outlet of the condenser 220, the interface b is connected with the third flow path 203, and the interface c is connected with the inlet of the water-wetted tube 221.

[0084] A throttling device 270 is arranged downstream of the connection between the second flow path 202 and the third flow path 203, that is, at the position adjacent to the inlet of the evaporator 230, the throttling device 270 can be an expansion valve or a capillary tube, the refrigerant flowing out of the condenser 220 or the water-wetted tube 221 flows into the throttling device 270, and the throttling device 270 reduces the pressure of the refrigerant flowing into the throttling device 270.

[0085] Referring toFigure 5 In the process that the dehumidifier 10 executes the heating dehumidification mode, the interface a and the interface b of the regulating valve 204 are connected, the one-way valve 205 is closed, the refrigerant discharged from the compressor 210 flows back to the compressor 210 after sequentially passing through the condenser 220, the throttling device 270 and the evaporator 230, and the total heat dissipation of the condenser 220 is only borne by the air.

[0086] Referring to Figure 6 In the process that the dehumidifier 10 executes the cooling dehumidification mode, the interface a and the interface c of the regulating valve 204 are connected, the one-way valve 205 is connected, the refrigerant discharged from the compressor 210 flows back to the compressor 210 after sequentially passing through the condenser 220, the water pipe 221, the throttling device 270 and the evaporator 230, and the total heat dissipation of the condenser 220 is borne by the air and the condensing water.

[0087] It should be noted that the type of the regulating valve 204 in the embodiment is a three-way valve, and the switching of the heating dehumidification mode and the cooling dehumidification mode is realized by cooperation with the one-way valve 205, the connection direction of the one-way valve 205 is from the water pipe 221 to the throttling device 270, and the present application is not limited to the type of the flow path switching valve group, and other valve combinations capable of realizing the control effect described in the present application can also be used.

[0088] In the embodiment of the present application, the first use state and the second use state of the flow path switching valve group can be defined, when the flow path switching valve group is switched to the first use state, the refrigerant flowing out of the condenser 220 flows into the evaporator 230 through the water pipe 221, and when the flow path switching valve group is switched to the second use state, the refrigerant flowing out of the condenser 220 directly flows into the evaporator 230.

[0089] Figure 7 is a schematic diagram of a control method of the dehumidifier 10 according to an embodiment of the present application, referring to Figure 7 The control method at least includes the following steps S702 to S706.

[0090] Step S702, starting the dehumidifier 10, and obtaining the dehumidification type of the dehumidifier 10.

[0091] Step S704, when the dehumidification type is cooling dehumidification, obtaining the outlet air temperature and the ambient temperature of the dehumidifier 10.

[0092] Step S706, adjusting the opening of the air baffle 310 according to the first difference between the outlet air temperature and the ambient temperature, and switching the flow path switching valve group to the first use state.

[0093] The control method of the dehumidifier 10 of the application adjusts the opening degree of the air baffle 310 according to the first difference value between the outlet air temperature and the ambient temperature when the dehumidifier 10 performs cooling dehumidification. The greater the first difference value, the greater the opening degree of the air baffle 310, which indicates that the outlet air temperature of the dehumidifier 10 is significantly higher than the ambient temperature, and more cooled air after dehumidification by the evaporator 230 is needed to adjust the outlet air temperature, so that the dehumidifier 10 reaches the comfortable air supply level. By switching the flow path switching valve group to the first use state, the refrigerant flowing out of the condenser 220 can flow through the bubble tube 221, and the bubble tube 221 can be cooled by the condenser water, thereby increasing the heat dissipation of the condenser 220 when the ventilation volume is reduced, and maintaining the dehumidification efficiency of the dehumidifier 10.

[0094] Before the step of obtaining the outlet air temperature and the ambient temperature of the dehumidifier 10, it can also be determined whether the dehumidifier 10 is running smoothly, and the outlet air temperature and the ambient temperature of the dehumidifier 10 are obtained after the dehumidifier 10 is running smoothly. It can be understood that when the dehumidifier 10 is running smoothly, the outlet air temperature is relatively stable, and the first difference value can be more accurate when the outlet air temperature and the ambient temperature are obtained at this time, which can effectively avoid the problem of frequent adjustment of the opening degree of the air baffle 310 caused by unstable outlet air temperature, and is beneficial to guarantee the operation reliability and service life of the dehumidifier.

[0095] The step of determining whether the dehumidifier 10 is running smoothly can be periodically obtaining the outlet air temperature of the dehumidifier 10, then calculating the difference value of the outlet air temperature obtained at adjacent two times, and then determining whether each difference value in the preset time period is less than or equal to the preset difference value. If the determination result is yes, it can be determined that the dehumidifier 10 is running smoothly.

[0096] In the embodiment of the application, the acquisition period of the outlet air temperature can be 5s, the preset time period can be 60s, and the preset temperature difference can be 0.3℃. That is, the outlet air temperature is obtained every 5s, and if the temperature of the outlet air temperature obtained at adjacent two times is less than or equal to 0.3℃ within 60s, it indicates that the dehumidifier 10 has been running smoothly under the current working condition, otherwise it will remain in the determination waiting state.

[0097] After the flow path switching valve group is switched to the first use state, the outlet air temperature and the ambient temperature of the dehumidifier 10 can be obtained again, and then it is determined whether the second difference value between the outlet air temperature and the ambient temperature belongs to the preset temperature range. If the second difference value belongs to the preset temperature range, the current opening degree of the air baffle 310 can be maintained.

[0098] In the embodiment of the application, the preset temperature range can be -3℃-0℃, and if the second difference value between the outlet air temperature and the ambient temperature belongs to -3℃-0℃, it indicates that the outlet air temperature of the dehumidifier 10 has reached the comfortable air supply level of the cooling dehumidification operation mode, and only the current opening degree of the air baffle 310 needs to be maintained.

[0099] To make the calculated second difference more accurate, before re-acquiring the outlet air temperature and the ambient temperature of the dehumidifier 10, it can also be re-judged whether the dehumidifier 10 runs smoothly, so as to acquire the outlet air temperature and the ambient temperature of the dehumidifier 10 under the premise that the dehumidifier 10 runs smoothly.

[0100] It can be understood that when the opening degree of the air baffle 310 changes, the outlet air temperature will also change. By re-acquiring the outlet air temperature and the ambient temperature after the dehumidifier 10 runs smoothly, the accuracy of the outlet air temperature can be guaranteed, and the accuracy of the second difference between the outlet air temperature and the ambient temperature can be guaranteed. Here, the judgment condition of whether the dehumidifier 10 runs smoothly can be the same as the aforementioned judgment condition, and thus will not be described again.

[0101] Further, if it is found that the second difference does not belong to the preset temperature range, it means that the dehumidifier 10 does not meet the comfortable outlet air level, at this time, the current opening degree of the air baffle 310 can be acquired, and then it is judged whether the current opening degree of the air baffle 310 reaches the opening degree threshold, if the judgment result is yes, it means that the opening degree of the air baffle 310 has reached the maximum, and an alarm should be prompted to the user that the outlet air temperature has reached the minimum level under the current running condition, if the judgment result is no, it can be due to the change of the ambient temperature, which causes the judgment opening degree to be unmatched with the actual one, and the opening degree of the air baffle 310 should be continued to be adjusted.

[0102] In the case that the second difference belongs to the preset temperature range and the current opening degree of the air baffle 310 is maintained, the outlet air temperature and the ambient temperature of the dehumidifier 10 can be continued to be acquired, and then it is judged whether the third difference between the outlet air temperature and the ambient temperature exceeds the preset temperature range, if the judgment result is yes, the air baffle 310 needs to be closed, and then the opening degree of the air baffle 310 is re-judged.

[0103] That is to say, in the dehumidification and cooling process, when the outlet air temperature reaches the comfortable outlet air level, the size judgment of the third difference between the outlet air temperature and the ambient temperature still needs to be performed, so as to ensure the timely adjustment of the opening degree of the air baffle 310 when the dehumidifier 10 running condition changes and causes the outlet air temperature to change. When the third difference is higher than the preset temperature range, it means that the outlet air temperature is higher than the ambient temperature, and the current running mode does not meet the requirement of the dehumidification and cooling running. When the third difference is lower than the preset temperature range, it means that the outlet air temperature is too low compared with the ambient temperature, which can be not conducive to the comfort requirement of the user, and the opening degree of the air baffle 310 needs to be re-adjusted.

[0104] In the embodiment of the present application, the opening degree of the air baffle 310 can be 0°-90°. For example, Figure 1 or Figure 2As shown, when the opening degree of the deflector 310 is 0°, the deflector 310 is in a vertical state, and when the opening degree of the deflector 310 is 90°, the deflector 310 is in an inclined state of being turned up from back to front. The opening degree of the deflector 310 can be determined according to the rotation angle of the motor 320 or according to the detection value of the angle sensor. Of course, the detection method can be various, and the present application does not limit this.

[0105] It is worth noting that, in the first deflector 310 opening degree adjustment process, the difference between the outlet air temperature and the ambient temperature should be accumulated on the basis of 0°, and in the non-first deflector 310 opening degree adjustment process, the difference between the outlet air temperature and the ambient temperature at this time should be accumulated on the basis of the previous time, so as to avoid disorder in the opening degree adjustment of the deflector 310.

[0106] In particular, after starting the dehumidifier 10, if the obtained dehumidification type is temperature-increasing dehumidification, the deflector 310 only needs to be kept in a closed state, and the flow path switching valve group is kept in the second use state.

[0107] In actual application, the user can issue a dehumidification type selection signal to the dehumidifier 10 through a key or the like, when the dehumidifier 10 receives a temperature-decreasing dehumidification selection signal, it is determined that the dehumidification type of the dehumidifier 10 is temperature-decreasing dehumidification, and when the dehumidifier 10 receives a temperature-increasing dehumidification selection signal, it is determined that the dehumidification type of the dehumidifier 10 is temperature-increasing dehumidification. If the dehumidification type selection signal of the dehumidifier 10 is not obtained within a specified time (for example, within 90s), the ambient temperature of the dehumidifier 10 can be obtained, and the dehumidification type of the dehumidifier 10 can be determined according to the ambient temperature. For example, when the ambient temperature is higher than 25℃, it is determined that the dehumidifier 10 executes temperature-decreasing dehumidification mode. When the ambient temperature is lower than 25℃, it is determined that the dehumidifier 10 executes temperature-increasing dehumidification mode. Within the specified time before determination, the dehumidifier 10 defaults to temperature-increasing dehumidification operation.

[0108] The outlet air temperature of the dehumidifier 10 can be measured by a temperature and humidity sensor placed on the outlet side, and the ambient temperature of the dehumidifier 10 can be measured by a temperature and humidity sensor placed on the shell of the dehumidifier 10.

[0109] Figure 8 is a flow chart of a control method of the dehumidifier 10 according to an embodiment of the present application, referring to Figure 8 The control method at least includes the following steps S802 to S814.

[0110] Step S802, start the dehumidifier 10.

[0111] Step S804, determine whether a dehumidification type selection signal is received within a specified time, if yes, execute step S806, if no, execute step S812.

[0112] Step S806, determine whether the dehumidification type selection signal is a cooling dehumidification selection signal, if yes, execute step S808, if not, execute step S810.

[0113] Step S808, determine the dehumidification type of the dehumidifier 10 as cooling dehumidification.

[0114] Step S810, determine the dehumidification type of the dehumidifier 10 as heating dehumidification.

[0115] Step S812, obtain the ambient temperature of the dehumidifier 10.

[0116] Step S814, determine whether the ambient temperature meets the cooling dehumidification operating condition, if yes, execute step S808, if not, execute step S810.

[0117] The control method of the dehumidifier 10 of the present application can realize active or passive switching of heating dehumidification and cooling dehumidification of the dehumidifier 10, so as to automatically determine the dehumidification type of the dehumidifier 10 according to the ambient temperature in the case where the user does not select the dehumidification type, which is beneficial to improve the user experience.

[0118] Figure 9 is a flow chart of the control method of the dehumidifier 10 when cooling dehumidification according to an embodiment of the present application, referring to Figure 9 , the control method at least includes the following steps S902 to step S928.

[0119] Step S902, determine whether the dehumidifier 10 runs smoothly, if yes, execute step S904, if not, continue to wait.

[0120] Step S904, obtain the outlet air temperature and ambient temperature of the dehumidifier 10.

[0121] Step S906, adjust the opening degree of the air baffle 310 according to the first difference value of the outlet air temperature and the ambient temperature.

[0122] Step S908, switch the flow path switching valve group to the first use state.

[0123] It should be noted that the execution order of step S906 and step S908 is not sequential, which can be exchanged before and after, or can be executed simultaneously.

[0124] Step S910, determine whether the dehumidifier 10 runs smoothly, if yes, execute step S912, if not, continue to wait.

[0125] Step S912, obtain the outlet air temperature and ambient temperature of the dehumidifier 10.

[0126] Step S914, it is judged whether the second difference between the air temperature and the ambient temperature belongs to the preset temperature range, if yes, step S916 is executed, if no, step S918 is executed.

[0127] Step S916, the current opening of the air baffle 310 is kept, and then step S924 is executed.

[0128] Step S918, the current opening of the air baffle 310 is obtained.

[0129] Step S920, it is judged whether the current opening of the air baffle 310 reaches the opening threshold, if yes, step S922 is executed, if no, step S904 is returned.

[0130] Step S922, an alarm prompt is output.

[0131] Step S924, the air temperature and the ambient temperature of the dehumidifier 10 are obtained.

[0132] Step S926, it is judged whether the third difference between the air temperature and the ambient temperature exceeds the preset temperature range, if yes, step S928 is executed, if no, step S924 is returned.

[0133] Step S928, the air baffle 310 is closed, and then step S904 is returned.

[0134] Figure 10 is a structural block diagram of the dehumidifier 10 according to an embodiment of the present application, referring to Figure 10 The dehumidifier 10 of the present application can further include a controller, which can include a processor 310 and a memory 320, and the memory 320 stores a machine executable program 321, and the machine executable program 321 is executed by the processor 310 to implement any one of the control methods in the embodiments of the present application.

[0135] The air temperature of the dehumidifier 10 can be obtained by a temperature and humidity sensor on the air outlet side, and the ambient temperature of the dehumidifier 10 can be obtained by a temperature and humidity sensor on the shell, the controller can be signal connected with the two temperature and humidity sensors, and the rotation angle of the motor 320 is controlled according to the detection results of the two temperature and humidity sensors, so as to adjust the opening size of the air baffle 310. The controller can be further connected with the main control device of the dehumidifier 10, for providing the feedback signal of the user to the main control device, and receiving the control instruction from the main control device.

[0136] The processor 310 can be a central processing unit (CPU), or a digital processing unit, etc. The processor 310 transmits and receives data through the communication interface. The memory 320 is used to store a machine executable program 321. The memory 320 is any medium capable of carrying or storing desired program codes in the form of instructions or data structures and capable of being accessed by a computer, and can also be a combination of a plurality of memories 320. The above-mentioned machine executable program 321 can be downloaded from a computer readable storage medium to a corresponding computing / processing device or downloaded and installed to the dehumidifier 10 via a network (for example, the Internet, a local area network, a wide area network, and / or a wireless network).

[0137] At this point, those skilled in the art will recognize that the present application has been well-demonstrated and described herein, but many other variations and modifications, which are in accordance with the principles of the present application, can be directly ascertained or derived from the present disclosure without departing from the spirit and scope of the present application. Therefore, the scope of the present application should be understood and construed as covering all such other variations or modifications.

Claims

1. A control method of a dehumidifier, the dehumidifier comprising a condenser, an evaporator, a bubble tube and a flow path switching valve group, a bypass air duct being formed above and / or below the condenser, a damper being arranged in the bypass air duct to adjust an opening degree of the bypass air duct, the bubble tube being immersed in condensate water, when the flow path switching valve group is switched to a first use state, refrigerant flowing out of the condenser flows into the evaporator through the bubble tube, when the flow path switching valve group is switched to a second use state, refrigerant flowing out of the condenser directly flows into the evaporator, the control method comprising: starting the dehumidifier, and obtaining a dehumidification type of the dehumidifier; when the dehumidification type is cooling dehumidification, obtaining an outlet air temperature and an ambient temperature of the dehumidifier; and adjusting the opening degree of the damper according to a first difference between the outlet air temperature and the ambient temperature, and switching the flow path switching valve group to the first use state. Before the step of obtaining the outlet air temperature and the ambient temperature of the dehumidifier, the control method further comprises: determining whether the dehumidifier is running smoothly; and if so, executing the step of obtaining the outlet air temperature and the ambient temperature of the dehumidifier. The step of determining whether the dehumidifier is running smoothly comprises: periodically obtaining the outlet air temperature of the dehumidifier; calculating a difference between the outlet air temperature obtained at two adjacent times, respectively; determining whether each of the differences within a preset time length is less than or equal to a preset difference; and if so, determining that the dehumidifier is running smoothly. After the step of switching the flow path switching valve group to the first use state, the control method further comprises: re-obtaining the outlet air temperature and the ambient temperature of the dehumidifier; determining whether a second difference between the outlet air temperature and the ambient temperature belongs to a preset temperature range; and if so, maintaining a current opening degree of the damper.

2. The control method of a dehumidifier according to claim 1, wherein, After the step of switching the flow path switching valve group to the first use state, and before the step of re-obtaining the outlet air temperature and the ambient temperature of the dehumidifier, the control method further comprises: re-determining whether the dehumidifier is running smoothly; and if so, executing the step of re-obtaining the outlet air temperature and the ambient temperature of the dehumidifier. 6.The control method of the dehumidifier according to claim 4, wherein if the second difference does not belong to the preset temperature range, obtaining the current opening degree of the damper; determining whether the current opening degree of the damper reaches an opening degree threshold; and if so, outputting an alarm prompt. After the step of maintaining the current opening degree of the damper, the control method further comprises: continuously obtaining the outlet air temperature and the ambient temperature of the dehumidifier; determining whether a third difference between the outlet air temperature and the ambient temperature exceeds the preset temperature range; and if so, closing the damper.

3. The control method of a dehumidifier according to claim 2, wherein, 8.The control method of the dehumidifier according to claim 1, wherein when the dehumidification type is heating dehumidification, maintaining the damper in a closed state; and maintaining the flow path switching valve group in the second use state. 9.The control method of the dehumidifier according to claim 1, wherein if a dehumidification type of the dehumidifier is not obtained within a specified time length, obtaining an ambient temperature of the dehumidifier, and determining the dehumidification type of the dehumidifier according to the ambient temperature. 10.A dehumidifier, comprising: ​ ​ 4. The control method of a dehumidifier according to claim 1, wherein, ​ ​ ​ ​ 5. The control method of a dehumidifier according to claim 4, wherein, ​ ​ ​ ​ ​ ​ ​ 7. The control method of a dehumidifier according to claim 4, wherein, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The condenser, evaporator, bubble tube and flow path switching valve group, the upper and / or lower part of the condenser forms a bypass air duct, the air baffle adjusting the opening size is arranged in the bypass air duct, the bubble tube is immersed in the condensate water, the flow path switching valve group in the first use state, the refrigerant flowing out of the condenser flows into the evaporator through the bubble tube, the flow path switching valve group in the second use state, the refrigerant flowing out of the condenser directly flows into the evaporator; And The controller comprises a processor and a memory, the memory stores a machine executable program, and the machine executable program is executed by the processor to implement the control method in any one of claims 1-9.

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