Drying equipment control method and drying equipment

Abstract

The embodiment of the invention provides a drying equipment control method and drying equipment. The drying equipment comprises a condenser, a heat exchanger, an evaporator, a first throttling component and a second throttling component, the evaporator and the condenser are arranged in an air duct of the drying equipment and are sequentially arranged in the air flowing direction in the air duct, and the heat exchanger is arranged outside the air duct of the drying equipment; the condenser, the heat exchanger and the evaporator are connected into the refrigerant pipeline in series and are sequentially arranged in the refrigerant flowing direction. The first throttling component is arranged between the condenser and the heat exchangers, and the second throttling component is arranged between the heat exchangers and the evaporators; the method comprises the steps that in a first working mode, the first throttling component and the second throttling component are controlled to be opened to a first opening degree and a second opening degree correspondingly, so that the condenser works in the working state of condensing refrigerants, and the heat exchanger and the evaporator both work in the working state of evaporating the refrigerants.

Description

Technical Field

[0001] The present application relates to the field of cleaning technology, and in particular to a drying equipment control method and drying equipment. Background Art

[0002] Drying equipment such as dryers use condensers and evaporators as heat exchange systems for internal heat circulation. The condenser and evaporator are arranged in the air duct of the dryer. The internal air extracted from the dryer's receiving chamber (such as a drum) enters the air duct, passes through the evaporator and condenser in turn, and the internal air is dehumidified and heated respectively to obtain dry hot air. The dry hot air re-enters the dryer's receiving chamber from the air duct to realize the circulation of the air inside the dryer. Since the condenser and evaporator realize the circulation of the air inside the dryer, the temperature of the compressor is easy to reach the protection point temperature. At this time, the compressor needs to reduce the operating frequency, so the drying time needs to be extended.

[0003] Therefore, how to improve the working environment of the heat exchange system, reduce the compressor load, improve the heat exchange efficiency of the heat exchange system, shorten the drying time, and improve the user experience are issues that need to be addressed urgently. Summary of the invention

[0004] In view of this, an embodiment of the present disclosure provides a drying equipment control method and a drying equipment.

[0005] According to a first aspect of an embodiment of the present disclosure, a method for controlling a drying device is provided, wherein the drying device comprises a condenser, a heat exchanger, an evaporator, a first throttling component and a second throttling component, wherein:

[0006] The evaporator and the condenser are arranged in the air duct of the drying device, the evaporator and the condenser are arranged in sequence along the air flow direction in the air duct, and the heat exchanger is arranged outside the air duct of the drying device; the condenser, the heat exchanger and the evaporator are connected in series in the refrigerant pipeline and arranged in sequence along the refrigerant flow direction; the first throttling component is arranged between the condenser and the heat exchanger, and the second throttling component is arranged between the heat exchanger and the evaporator; the method comprises:

[0007] In the first working mode, the first throttling component and the second throttling component are controlled to open to a first opening degree and a second opening degree respectively, so that the condenser works in a working state of condensing the refrigerant, and the heat exchanger and the evaporator both work in a working state of evaporating the refrigerant.

[0008] In some embodiments, the method further comprises:

[0009] In the second working mode, the first throttling component and the second throttling component are controlled to open to a third opening degree and a fourth opening degree respectively, so that the condenser and the heat exchanger both work in a working state of condensing the refrigerant, and the evaporator works in a working state of evaporating the refrigerant.

[0010] In some embodiments, the method further comprises:

[0011] In response to the drying device currently operating in a first operating mode and the temperature of the air entering the air duct being higher than a first preset temperature, the drying device is switched from the first operating mode to the second operating mode.

[0012] In some embodiments, the method further comprises:

[0013] In response to the drying device currently operating in the second operating mode and the temperature of the air entering the air duct is lower than the second preset temperature, the second throttling component is controlled to open to a fifth opening and closing degree, wherein the fifth opening and closing degree is greater than the fourth opening and closing degree and less than the third opening and closing degree.

[0014] In some embodiments, the method further comprises:

[0015] In response to the drying device currently operating in the second operating mode and the temperature of the air entering the air duct being higher than the second preset temperature, the second throttling component is controlled to open to the fourth opening degree.

[0016] In some embodiments, the third opening and closing degree is greater than the fourth opening and closing degree.

[0017] In some embodiments, the first opening degree is smaller than the third opening degree;

[0018] and / or

[0019] The second opening and closing degree is greater than the fourth opening and closing degree.

[0020] In some embodiments, the first opening and closing degree is smaller than the second opening and closing degree.

[0021] In some embodiments, the heat exchanger is used to exchange heat with air outside the drying device.

[0022] In some embodiments, the drying device further comprises: a heat exchange fan;

[0023] The heat exchange fan is used to increase the flow rate of air flowing through the heat exchanger.

[0024] According to a second aspect of an embodiment of the present disclosure, a drying device includes a condenser, a heat exchanger, an evaporator, a first throttling component, a second throttling component and a controller, wherein:

[0025] The evaporator and the condenser are arranged in the air duct of the drying device, the evaporator and the condenser are arranged in sequence along the air flow direction in the air duct, and the heat exchanger is arranged outside the air duct of the drying device; the condenser, the heat exchanger and the evaporator are connected in series in the refrigerant pipeline and arranged in sequence along the refrigerant flow direction; the first throttling component is arranged between the condenser and the heat exchanger, and the second throttling component is arranged between the heat exchanger and the evaporator; the controller is used for:

[0026] In the first working mode, the first throttling component and the second throttling component are controlled to open to a first opening degree and a second opening degree respectively, so that the condenser works in a working state of condensing the refrigerant, and the heat exchanger and the evaporator both work in a working state of evaporating the refrigerant.

[0027] In some embodiments, the controller is further configured to:

[0028] In the second working mode, the first throttling component and the second throttling component are controlled to open to a third opening degree and a fourth opening degree respectively, so that the condenser and the heat exchanger both work in a working state of condensing the refrigerant, and the evaporator works in a working state of evaporating the refrigerant.

[0029] In the drying equipment control method provided in the embodiment of the present disclosure, the drying equipment includes a condenser, a heat exchanger, an evaporator, a first throttling component and a second throttling component, wherein the evaporator and the condenser are arranged in the air duct of the drying equipment, the evaporator and the condenser are arranged in sequence along the air flow direction in the air duct, and the heat exchanger is arranged outside the air duct of the drying equipment; the condenser, the heat exchanger and the evaporator are connected in series in the refrigerant pipeline, and are arranged in sequence along the refrigerant flow direction; the first throttling component is arranged between the condenser and the heat exchanger, and the second throttling component is arranged between the heat exchanger and between the evaporator; the method includes: in a first working mode, controlling the first throttling component and the second throttling component to open to a first opening degree and a second opening degree respectively, so that the condenser works in a working state of condensing the refrigerant, and the heat exchanger and the evaporator both work in a working state of evaporating the refrigerant. In this way, by setting a heat exchanger between the condenser and the evaporator, and adjusting the first throttling component and the second throttling component so that the heat exchanger outside the air duct absorbs external heat to achieve refrigerant evaporation, the evaporator reduces the absorption of internal air heat, thereby improving the efficiency of the condenser heating the internal air, increasing the internal air heating speed, and improving the user experience. At the same time, the mutual offset of the heat exchange between the condenser and the evaporator on the internal air is reduced, reducing the compressor workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural intention of a drying device according to an exemplary embodiment;

[0031] Figure 2 This is a structural diagram of a drying device according to an exemplary embodiment;

[0032] Figure 3 This is a process diagram of a drying equipment control method according to an exemplary embodiment;

[0033] Figure 4 This is a structural diagram of a drying device according to an exemplary embodiment;

[0034] Figure 5 The present invention is a flowchart of a drying equipment control method according to an exemplary embodiment. DETAILED DESCRIPTION

[0035] In order to make the technical solutions and beneficial effects of the present invention more clearly understandable, the following is a detailed description by listing specific embodiments. The drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0036] The embodiments of the present disclosure are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0037] In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

[0038] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0039] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun after the article may be understood as a singular expression or a plural expression.

[0040] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0041] In some embodiments, the terms "at least one", "one or more", "aplurality of", "multiple", etc. can be used interchangeably.

[0042] In some embodiments, "at least one of A and B", "A and / or B", "A in one case, B in another case", "A in one case, B in another case", etc., may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0043] In some embodiments, the recording method of "A or B" may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0044] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, value or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute redundant restrictions due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields", and the "first" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the numerical value of the description object is not limited by the ordinal number, and can be one or more. Taking the "first device" as an example, the numerical value of the "device" can be one or more. In addition, the objects modified by different prefixes may be the same or different. For example, if the description object is "device", then the "first device" and the "second device" may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" may be the same information or different information, and their contents may be the same or different.

[0045] In some embodiments, “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0046] In some embodiments, terms such as “…”, “determine…”, “in the case of…”, “at the time of…”, “when…”, “if…”, “if…”, etc. can be used interchangeably.

[0047] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0048] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0049] In addition, each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, or any columns may also be implemented as an independent embodiment.

[0050] In some embodiments, the structure of the drying device 10 such as a clothes dryer is as follows: Figure 1 shown. Figure 1 2 is a cross-sectional view of the drying device, which includes a receiving chamber 100 for placing objects to be dried (such as clothes to be dried) and an air duct 200. A circulating fan 230, a condenser 220 and an evaporator 210 are arranged in the air duct 200. The circulating fan 230 is used to draw the internal air in the receiving chamber 100 from the first end of the air duct 200 and discharge it from the second end of the air duct 200. The air circulation flow direction of the drying device is as shown in FIG. Figure 1 As shown by arrow A. The internal air entering the air duct 200 flows through the evaporator 210 and the condenser 220 in sequence. The condenser 220 and the evaporator 210 are connected to the compressor 300 through the refrigerant pipe 270. The compressor 300 is used to compress the refrigerant vapor to obtain high-temperature and high-pressure steam. The condenser 220 is used to liquefy the high-temperature and high-pressure steam to obtain a high-pressure refrigerant liquid, while releasing heat to the outside. The evaporator 210 is used to convert the high-pressure refrigerant liquid into a low-temperature and low-pressure refrigerant vapor while absorbing external heat. Therefore, in the process of the internal air being drawn in from the first end of the air duct 200 and discharged from the second end of the air duct 200, the evaporator 210 condenses the moisture in the internal air to dry it, and the condenser 220 heats the dried air and discharges it back into the accommodating chamber 100, forming a drying cycle.

[0051] Since the condenser 220 and the evaporator 210 realize the circulation of the air inside the clothes dryer, the temperature of the compressor 300 easily reaches the protection point temperature. At this time, the compressor 300 needs to reduce the working frequency, which reduces the heat exchange efficiency. Therefore, how to improve the working environment of the heat exchange system, reduce the load of the compressor 300, improve the heat exchange efficiency of the heat exchange system, shorten the drying time, and improve the user experience are problems that need to be solved urgently.

[0052] The disclosed embodiment provides a drying equipment control method, such as Figure 2 As shown, the drying device includes a condenser 220, a heat exchanger 240, an evaporator 210, a first throttling component 250 and a second throttling component 260, wherein:

[0053] The evaporator 210 and the condenser 220 are arranged in the air duct 200 of the drying device, and the evaporator 210 and the condenser 220 are arranged in sequence along the air flow direction in the air duct 200, and the heat exchanger 240 is arranged outside the air duct 200 of the drying device; the condenser 220, the heat exchanger 240 and the evaporator 210 are connected in series in the refrigerant pipe 270, and are arranged in sequence along the refrigerant flow direction; the first throttling component 250 is arranged between the condenser 220 and the heat exchanger 240, and the second throttling component 260 is arranged between the heat exchanger 240 and the evaporator 210; Figure 3 As shown, the method includes:

[0054] Step 301: In the first working mode, the first throttling component 250 and the second throttling component 260 are controlled to open to a first opening degree and a second opening degree respectively, so that the condenser 220 works in a working state of condensing the refrigerant, and the heat exchanger 240 and the evaporator 210 both work in a working state of evaporating the refrigerant.

[0055] In a possible implementation, the drying device may further include a controller for controlling the operation of various components of the drying device. In this embodiment, the control method may be executed by the controller.

[0056] In some embodiments, the name of the controller is not limited to the name recorded in the embodiments, and terms such as "processor", "controller", "central processing unit (CPU)", "microcontroller unit (MCU)", "sensor processor (Microcontroller Unit, MCU)", "microprocessing unit (MicroProcessing Unit, MCU)", and "microprocessor (Micro Processing Unit, MCU)" can be used interchangeably.

[0057] like Figure 2 As shown, the refrigerant output from the refrigerant output port of the compressor 300 flows through the condenser 220, the first throttling component 250, the heat exchanger 240, the second throttling component 260 and the evaporator 210 in sequence, and finally the refrigerant returns to the compressor 300 from the refrigerant input port of the compressor 300.

[0058] The evaporator 210 and the condenser 220 are disposed in the air duct 200. The working principles and functions of the evaporator 210 and the condenser 220 are as shown in the above embodiment, and will not be described in detail here.

[0059] The throttling component can be used to adjust the flow rate of the refrigerant, thereby adjusting the function of the heat exchanger 240.

[0060] In a possible implementation, the throttling component may include an electronic expansion valve, which uses an electrical signal generated by an adjusted parameter to control a voltage or current applied to the electronic expansion valve, thereby achieving the purpose of adjusting the refrigerant flow rate.

[0061] For example, the electronic expansion valve adjusts the valve core through a stepper motor, thereby adjusting the refrigerant flow. For example, the number of steps of the stepper motor is positively correlated with the opening degree (opening degree) of the valve core, that is, the more steps the stepper motor steps, the greater the opening degree of the electronic expansion valve, and the greater the refrigerant flow.

[0062] Here, the first working mode may be a heating mode in which the drying device heats the internal air in the receiving chamber 100 from room temperature to a first predetermined temperature. The first predetermined temperature may be a pre-set drying temperature.

[0063] In a possible implementation, different objects to be dried correspond to different first predetermined temperatures.

[0064] In a possible implementation, the drying device may enter the first working mode during a preheating phase after being powered on.

[0065] In the first working mode, the drying device needs to heat the internal air from room temperature to a first predetermined temperature so as to cause the moisture on the object to be dried to evaporate into the internal air. Since the condenser 220 and the evaporator 210 are connected in series in the refrigerant pipe 270, that is, in the process of the condenser 220 condensing the refrigerant to heat the internal air, the evaporator 210 also absorbs the heat in the internal air while evaporating the refrigerant, so that the heating effect of the condenser 220 and the heat absorption effect of the evaporator 210 offset each other, so that the internal air is heated slowly, and the workload of the compressor 300 is increased.

[0066] Here, the first throttle component 250 may be controlled to open to a first opening degree, and the second throttle component 260 may be controlled to open to a second opening degree, so that both the heat exchanger 240 and the evaporator 210 operate in a working state of evaporating the refrigerant.

[0067] Here, the heat exchanger 240 can perform heat exchange with air other than the internal air. The heat exchanger 240 is located before the evaporator 210 in the refrigerant flow direction, so the heat exchanger 240 can absorb heat to evaporate the refrigerant before the evaporator 210. In this way, the liquid refrigerant flowing into the evaporator 210 can be reduced, thereby reducing the evaporation amount of the refrigerant in the evaporator 210, and further reducing the heat absorbed by the evaporator 210 from the internal air.

[0068] In some embodiments, the heat exchanger 240 is used to exchange heat with air outside the drying device.

[0069] Here, the heat exchanger 240 may be disposed outside the accommodating chamber 100 and the air duct 200 , and the heat exchanger 240 performs heat exchange with the air outside the drying device.

[0070] It is understandable that when the drying device operates in the first working mode, the heat exchanger 240 is equivalent to the second evaporator. The first evaporator 210 is located in the air duct 200, and the second evaporator is located outside the air duct 200 to exchange heat with the external air. Therefore, part of the refrigerant evaporates through heat exchange with the external air, reducing the heat absorbed from the internal air, making it easier to increase the temperature of the internal air through the condenser 220.

[0071] In some embodiments, Figure 4 As shown, the drying device further includes: a heat exchange fan 241 ; the heat exchange fan 241 is used to increase the flow rate of air flowing through the heat exchanger 240 .

[0072] Here, the heat exchange fan 241 can increase the flow rate of the external air flowing through the heat exchanger 240, and improve the heat exchange efficiency between the heat exchanger 240 and the external air. When the heat exchanger 240 is working in the working state of evaporating the refrigerant, the processor can control the heat exchange fan 241 to be in an open state, improve the heat exchange efficiency between the heat exchanger 240 and the external air, and then improve the efficiency of the heat exchanger 240 evaporating the refrigerant.

[0073] In some embodiments, the first opening and closing degree is smaller than the second opening and closing degree.

[0074] The controller can adjust the working state of the heat exchanger 240 by controlling the opening and closing degree of the first throttle component 250 and the second throttle component 260. When the opening and closing degree of the first throttle component 250 is small, a small amount of high-temperature and high-pressure refrigerant liquid in the condenser 220 passes through the first throttle component 250, and the pressure and / or temperature in the heat exchanger 240 are reduced, and the volume expands to become a low-temperature and low-pressure gas-liquid mixture. The heat exchanger 240 plays the role of the evaporator 210. Therefore, in the first working mode, the first opening and closing degree can take a smaller value. The second opening and closing degree can take a value greater than the second opening and closing degree, so that the heat exchanger 240 and the evaporator 210 work in the state of evaporating the refrigerant at the same time.

[0075] It can be understood that when the drying device operates in the first working mode, the pressure P1 in the condenser 220 is greater than the condensing pressure threshold, and the pressure P2 in the heat exchanger 240 and the pressure P3 in the evaporator 210 are less than the evaporation pressure threshold by controlling the first throttling component 250 and the second throttling component 260, wherein P1>P2>P3. Here, the condensing pressure threshold may be the minimum pressure value at which the refrigerant can condense into liquid; the condensing pressure threshold is the maximum pressure value at which the refrigerant can evaporate into gas.

[0076] Exemplarily, in practical applications, the throttling component may include an electronic expansion valve. That is, the first throttling component 250 is a first electronic expansion valve, and the second throttling component 260 is a second electronic expansion valve. The electronic expansion valve adjusts the opening and closing degree through a stepper motor. The more the number of steps of the stepper motor, the greater the opening and closing degree of the electronic expansion valve. Under the first working module, the stepper motor of the first electronic expansion valve can be turned on to 250 steps, and the stepper motor of the second electronic expansion valve can be turned on to 500 steps. Thereby, the heat exchanger 240 can work together with the evaporator 210 in the working state of evaporating the refrigerant.

[0077] In this way, by arranging the heat exchanger 240 between the condenser 220 and the evaporator 210, and adjusting the first throttling component 250 and the second throttling component 260 so that the heat exchanger 240 located outside the air duct 200 absorbs external heat to achieve refrigerant evaporation, the absorption of internal air heat by the evaporator 210 is reduced, thereby improving the efficiency of the condenser 220 in heating the internal air, increasing the internal air heating speed, and improving the user experience. At the same time, the mutual offset of the heat exchange of the internal air between the condenser 220 and the evaporator 210 is reduced, and the workload of the compressor 300 is reduced.

[0078] In some embodiments, the first opening degree is smaller than the third opening degree;

[0079] and / or

[0080] The second opening and closing degree is greater than the fourth opening and closing degree.

[0081] When the drying device switches from the first working mode to the second working mode, the first throttling component 250 switches from the first opening degree to the third opening degree, and the first second throttling component 260 switches from the first opening degree to the third opening degree.

[0082] The first opening degree is relatively small, and after the refrigerant passes through the first throttling component 250, due to the large pressure difference before and after the first throttling component 250, the liquid refrigerant flowing out of the condenser 220 can be converted from liquid to gas in the heat exchanger 240, so that the heat exchanger 240 works in the working state of evaporating refrigerant. The third opening degree is relatively large, so that the pressure difference between the condenser 220 and the heat exchanger 240 is reduced, and because the third opening degree is relatively large, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 300 can directly reach the heat exchanger 240, and is converted into liquid refrigerant through heat exchange in the heat exchanger 240, so that the heat exchanger 240 works in the working state of condensing refrigerant. That is, the first throttling component 250 switches from the first opening degree with a smaller opening degree to the third opening degree with a larger opening degree, so that the heat exchanger 240 switches from the working state of evaporating refrigerant to the working state of condensing refrigerant.

[0083] When the second throttle component 260 is at the second opening degree, since the heat exchanger 240 is working in the working state of evaporating the refrigerant, the larger opening degree of the second throttle component 260 reduces the pressure difference between the heat exchanger 240 and the evaporator 210, reduces the evaporation efficiency of the evaporator 210, and reduces the heat absorbed by the evaporator 210. When the second throttle component 260 is at the fourth opening degree, since the heat exchanger 240 is working in the working state of condensing the refrigerant, the smaller opening degree of the second throttle component 260 increases the pressure difference between the heat exchanger 240 and the evaporator 210, thereby increasing the evaporation efficiency of the evaporator 210 and improving the effect of condensing water vapor in the internal air. In some embodiments, as Figure 5 As shown, the method also includes:

[0084] Step 501: In the second working mode, control the first throttling component 250 and the second throttling component 260 to open to the third opening and closing degrees and the fourth opening and closing degrees respectively, so that the condenser 220 and the heat exchanger 240 both work in the working state of condensing the refrigerant, and the evaporator 210 works in the working state of evaporating the refrigerant.

[0085] Here, the second working mode may be a working mode in which the drying device dries the objects to be dried.

[0086] In the second working mode, the moisture in the internal air needs to be condensed by the evaporator 210. Therefore, the evaporator 210 needs to be operated in a working state of evaporating the refrigerant. In order to make more refrigerant evaporate in the evaporator 210, the evaporator 210 can be operated in a working state of condensing the refrigerant.

[0087] Here, the first throttle component 250 and the second throttle component 260 may be controlled so that both the condenser 220 and the heat exchanger 240 operate in a working state of condensing the refrigerant.

[0088] Since the internal air temperature is relatively high in the second working mode (e.g., the internal air temperature has been raised to the first temperature threshold in the first working mode), and the condenser 220 is working in a state of releasing heat to the outside, therefore, the higher the inner wall temperature, the lower the efficiency of the condenser 220. The heat exchanger 240 exchanges heat with the outside air, and the outside air temperature is usually lower than the inside air temperature. Therefore, when the heat exchanger 240 is working in the working state of condensing the refrigerant, the outside air temperature is lower, which is more conducive to heat exchange.

[0089] In this way, the condenser 220 and the heat exchanger 240 condense the refrigerant at the same time, and the refrigerant condensation is performed relative to the condenser 220, which can improve the efficiency of the refrigerant condensation. Compared with the same amount of refrigerant condensation, the load of the compressor 300 can be reduced, thereby reducing the situation where the compressor 300 is overheated due to excessive load. In addition, the situation where the compressor 300 reduces the power due to overheating can be reduced, so that the compressor 300 can work at a higher power, thereby improving the drying efficiency and thus improving the user experience.

[0090] In some embodiments, the third opening and closing degree is greater than the fourth opening and closing degree.

[0091] The controller can adjust the working state of the heat exchanger 240 by controlling the opening and closing degree of the first throttle component 250 and the second throttle component 260. When the opening and closing degree of the first throttle component 250 is large, the condenser 220 and the heat exchanger 240 jointly form a condensation effect on the refrigerant. Therefore, in the second working mode, the third opening and closing degree can take a smaller value. For example, in the second working mode, the first throttle component 250 can be in a fully open state. The second throttle component 260 can be opened a smaller amount so that the evaporator 210 plays the role of evaporating the refrigerant. .

[0092] It can be understood that when the drying device is working in the second working mode, the pressure P1 in the condenser 220 and the pressure P2 in the heat exchanger 240 are controlled to be greater than the condensation pressure threshold, and the pressure P3 in the evaporator 210 is less than the evaporation pressure threshold, where P1>P2>P3. Here, the condensation pressure threshold may be the minimum pressure value at which the refrigerant can condense into liquid; the condensation pressure threshold is the maximum pressure value at which the refrigerant can evaporate into gas.

[0093] Exemplarily, in practical applications, the throttling component may include an electronic expansion valve. That is, the first throttling component 250 is a first electronic expansion valve, and the second throttling component 260 is a second electronic expansion valve. The electronic expansion valve adjusts the opening and closing degree through a stepper motor. The more the number of steps of the stepper motor, the greater the opening and closing degree of the electronic expansion valve. Under the second working module, the stepper motor of the first electronic expansion valve can be turned on to 500 steps, and the stepper motor of the second electronic expansion valve can be turned on to 370 steps. Thereby, the heat exchanger 240 can work together with the condenser 220 in the working state of condensing the refrigerant.

[0094] The second throttling component 260 is at the fourth opening degree. When the heat exchanger 240 works in the working state of condensing the refrigerant, the processor can control the heat exchange fan 241 to be in the open state, thereby improving the heat exchange efficiency between the heat exchanger 240 and the external air, thereby improving the efficiency of the heat exchanger 240 in condensing the refrigerant.

[0095] In some embodiments, the method further comprises:

[0096] In response to the drying device currently operating in the first operating mode and the temperature of the air entering the air duct 200 is higher than a first preset temperature, the drying device is switched from the first operating mode to the second operating mode.

[0097] Here, a temperature sensor may be provided at the inlet of the air duct 200 to detect the temperature of the internal air. The temperature at the inlet of the air duct 200 is closer to the temperature of the air passing through the objects to be dried, so that the temperature of the air passing through the objects to be dried can be determined more accurately.

[0098] Here, the first working mode may be a working mode in which the drying device preheats the internal air, and the second working mode may be a working mode in which the objects to be dried are dried.

[0099] The first preset temperature may be a pre-set drying temperature.

[0100] In a possible implementation, different objects to be dried correspond to different first preset temperatures. The first preset temperature can be set based on the temperature tolerance of the objects to be dried. The first preset temperature is positively correlated with the amount of water volatilization of the objects to be dried.

[0101] In the first working mode, by controlling the first throttling component 250 and the second throttling component 260, the heat exchanger 240 operates in the working state of evaporating the refrigerant to reduce the heat absorbed by the internal air by the evaporator 210, thereby improving the efficiency of the condenser 220 in heating the internal air, shortening the time to heat the internal air to the first predetermined temperature, and improving the user experience.

[0102] When the internal air temperature reaches the first preset temperature, the controller controls the drying equipment to perform drying work, that is, enters the second working mode. In the first working mode, by controlling the first throttling component 250 and the second throttling component 260, the heat exchanger 240 works in the working state of condensing the refrigerant, thereby improving the efficiency of the condensing refrigerant, thereby reducing the load of the compressor 300, allowing the compressor 300 to continue to work at a higher power, shortening the drying time, and improving the user experience.

[0103] In some embodiments, the method further comprises:

[0104] In response to the drying device currently operating in the second operating mode and the temperature of the air entering the air duct 200 is lower than the second preset temperature, the second throttling component 260 is controlled to open to a fifth opening degree, wherein the fifth opening degree is greater than the fourth opening degree and less than the third opening degree.

[0105] When the dryer is working, the temperature of the internal air needs to be raised to the first preset temperature first, and then the object to be dried is dried. During the drying process, the internal air needs to be maintained at the second preset temperature. Here, the first preset temperature and the second preset temperature can be the same or different.

[0106] When the internal air temperature is lower than the second preset temperature, the opening and closing degree of the second throttle component 260 may be increased to a fifth opening and closing degree.

[0107] When the second throttle component 260 is opened to the fifth degree, more refrigerant enters the evaporator 210 than when the second throttle component 260 is opened to the fourth degree, and the evaporation of the evaporator 210 is incomplete, so that the cooling capacity of the evaporator 210 decreases, so that the internal air can be restored to the second preset temperature.

[0108] Exemplarily, in actual application, the throttling component may include an electronic expansion valve. That is, the first throttling component 250 is a first electronic expansion valve, and the second throttling component 260 is a second electronic expansion valve. The electronic expansion valve adjusts the opening and closing degree through a stepper motor. The more the number of steps of the stepper motor, the greater the opening and closing degree of the electronic expansion valve. Under the second working module, if the internal air is lower than the second preset temperature, the stepper motor of the first electronic expansion valve can be turned on to 500 steps, and the stepper motor of the second electronic expansion valve can be turned on to 390 steps. Thereby, the cooling capacity of the evaporator 210 is reduced, so that the internal air can be restored to the second preset temperature.

[0109] In a possible implementation, in response to the drying device currently operating in the second operating mode and the temperature of the air entering the air duct 200 being lower than a second preset temperature, the heat exchange fan 241 is controlled to stop rotating.

[0110] Controlling the heat exchange fan 241 to stop rotating can reduce the efficiency of the heat exchanger 240 in condensing the refrigerant. Since the condenser 220 and the heat exchanger 240 condense the refrigerant at the same time, when the efficiency of the heat exchanger 240 is reduced, the temperature of the condenser 220 increases, thereby accelerating the heating of the internal air.

[0111] In some embodiments, the method further comprises:

[0112] In response to the drying device currently operating in the second operating mode and the temperature of the air entering the air duct 200 being higher than the second preset temperature, the second throttling component 260 is controlled to open to the fourth opening degree.

[0113] After the second throttle component 260 is controlled to open to the fifth opening degree to increase the internal air temperature, if the internal air reaches the second preset temperature, the second throttle component 260 may be controlled to return to the fourth opening degree.

[0114] During the drying process of the drying device, since the internal air is constantly changing, a detection cycle can be preset (for example, the detection cycle can be 2 minutes to 5 minutes, such as 3 minutes, etc.). The internal air temperature can be periodically detected, such as the temperature of the air entering the air duct 200. The opening and closing degree of the first throttle component 250 and / or the second throttle component 260 is adjusted based on the detected temperature to adjust the internal air temperature.

[0115] Detecting the temperature based on the detection cycle can, on the one hand, reduce the situation where the internal air temperature cannot be obtained in time, and on the other hand, can also reduce the operational complexity caused by too frequent detection.

[0116] In one possible implementation, Figure 4 As shown, the drying device further includes: a condensing fan 221 ; the condensing fan 221 is used to increase the flow rate of air flowing through the condenser 220 .

[0117] In a possible implementation, the condensing fan 221 is as follows: Figure 1 Circulation fan 230 is shown.

[0118] In a possible implementation, the condensing fan 221 is a fan specifically used for the condenser 220 .

[0119] Here, the condensing fan 221 can increase the flow rate of air flowing through the condenser 220 , improve the heat exchange efficiency between the condenser 220 and the internal air, and improve the efficiency of condensing the refrigerant of the condenser 220 .

[0120] The present application also provides a drying device, such as a clothes dryer, etc. The structure of the drying device is as described in any of the above embodiments, which will not be described in detail here. The drying device also includes a controller.

[0121] In a possible implementation, the drying device further includes a drum, a motor for driving the drum, and the like.

[0122] The controller is used to execute the above drying equipment control method, which will not be described in detail here.

[0123] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above drying equipment control method is implemented.

[0124] The computer-readable storage medium provided in this embodiment can execute the control method of the drying equipment in the above-mentioned embodiment, and its implementation principle and technical effect are similar, which will not be described in detail in this embodiment.

[0125] The computer-readable storage medium mentioned above can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0126] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in an electronic device or a main control device.

[0127] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0128] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0129] In the description of this specification, reference to "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A drying equipment control method, It is characterized in that The drying device comprises a condenser, a heat exchanger, an evaporator, a first throttling component and a second throttling component, wherein: The evaporator and the condenser are arranged in the air duct of the drying device, the evaporator and the condenser are arranged in sequence along the air flow direction in the air duct, and the heat exchanger is arranged outside the air duct of the drying device; the condenser, the heat exchanger and the evaporator are connected in series in the refrigerant pipeline and arranged in sequence along the refrigerant flow direction; the first throttling component is arranged between the condenser and the heat exchanger, and the second throttling component is arranged between the heat exchanger and the evaporator; the method comprises: In the first working mode, the first throttling component and the second throttling component are controlled to open to a first opening degree and a second opening degree respectively, so that the condenser works in a working state of condensing the refrigerant, and the heat exchanger and the evaporator both work in a working state of evaporating the refrigerant.

2. The method according to claim 1, It is characterized in that The method further comprises: In the second working mode, the first throttling component and the second throttling component are controlled to open to a third opening degree and a fourth opening degree respectively, so that the condenser and the heat exchanger both work in a working state of condensing the refrigerant, and the evaporator works in a working state of evaporating the refrigerant.

3. The method according to claim 2, It is characterized in that The method further comprises: In response to the drying device currently operating in a first operating mode and the temperature of the air entering the air duct being higher than a first preset temperature, the drying device is switched from the first operating mode to the second operating mode.

4. The method according to claim 2, It is characterized in that The method further comprises: In response to the drying device currently operating in the second operating mode and the temperature of the air entering the air duct is lower than the second preset temperature, the second throttling component is controlled to open to a fifth opening and closing degree, wherein the fifth opening and closing degree is greater than the fourth opening and closing degree and less than the third opening and closing degree.

5. The method according to claim 4, It is characterized in that The method further comprises: In response to the drying device currently operating in the second operating mode and the temperature of the air entering the air duct being higher than the second preset temperature, the second throttling component is controlled to open to the fourth opening degree.

6. The method according to claim 2, It is characterized in that The third opening and closing degree is greater than the fourth opening and closing degree.

7. The method according to claim 2, It is characterized in that The first opening degree is smaller than the third opening degree; and / or The second opening and closing degree is greater than the fourth opening and closing degree.

8. The method according to claim 1, It is characterized in that The first opening and closing degree is smaller than the second opening and closing degree.

9. The method according to any one of claims 1 to 8, It is characterized in that The heat exchanger is used for exchanging heat with the air outside the drying device.

10. The method according to claim 9, It is characterized in that The drying equipment further comprises: a heat exchange fan; The heat exchange fan is used to increase the flow rate of air flowing through the heat exchanger.

11. A drying device, It is characterized in that The drying device comprises a condenser, a heat exchanger, an evaporator, a first throttling component, a second throttling component and a controller, wherein: The evaporator and the condenser are arranged in the air duct of the drying device, the evaporator and the condenser are arranged in sequence along the air flow direction in the air duct, and the heat exchanger is arranged outside the air duct of the drying device; the condenser, the heat exchanger and the evaporator are connected in series in the refrigerant pipeline and arranged in sequence along the refrigerant flow direction; the first throttling component is arranged between the condenser and the heat exchanger, and the second throttling component is arranged between the heat exchanger and the evaporator; the controller is used for: In the first working mode, the first throttling component and the second throttling component are controlled to open to a first opening degree and a second opening degree respectively, so that the condenser works in a working state of condensing the refrigerant, and the heat exchanger and the evaporator both work in a working state of evaporating the refrigerant.

12. The drying device according to claim 11, It is characterized in that The controller is also used for: In the second working mode, the first throttling component and the second throttling component are controlled to open to a third opening degree and a fourth opening degree respectively, so that the condenser and the heat exchanger both work in a working state of condensing the refrigerant, and the evaporator works in a working state of evaporating the refrigerant.

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