Control methods, devices and equipment for heat pump dryers

Abstract

This application belongs to the field of dryer technology, specifically relating to a control method, device, and equipment for a heat pump dryer. This application aims to solve the problems of existing heat pump dryers failing to achieve optimal performance, affecting drying efficiency, and consuming high energy. The control method of this application for a heat pump dryer obtains the current moisture content of the clothes inside the drum, from which the drying stage of the clothes can be inferred. Based on the drying stage, the motor speed, fan speed, and the on / off state of the heating element are adjusted, rather than simply controlling and adjusting the motor speed. This multi-faceted control strategy of the heat pump dryer helps to achieve optimal performance, thereby improving the efficiency of the heat pump dryer while avoiding excessive energy consumption.

Description

Technical Field

[0001] This application belongs to the field of dryer technology, specifically relating to a control method, device and equipment for a heat pump dryer. Background Technology

[0002] A heat pump dryer is a common household appliance used to dry clothes. A heat pump dryer consists of a drum, a fan, an air duct, and a heat pump system. The drum holds the clothes and can rotate. The air duct is connected to the drum. The heat pump system exchanges heat with the air inside the air duct. The fan drives the air to circulate between the drum and the air duct.

[0003] To improve the drying effect of clothes, heat pump dryers also include a detection device and a controller electrically connected to the detection device. The detection device is used to detect the humidity of the clothes, and the controller controls the rotation speed of the drum based on the humidity detected by the detection device. When the humidity of the clothes is high, the rotation speed of the drum increases, thereby increasing the contact area between the clothes and the hot air, which helps to improve the drying efficiency.

[0004] However, the humidity of clothes changes significantly during the drying process. Using a single control strategy, heat pump dryers cannot achieve optimal results, affecting drying efficiency and consuming a lot of energy. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the prior art, namely, the problem that the heat pump dryer cannot achieve the best effect, affecting the drying efficiency and consuming a lot of energy, the present application provides a control method, device and equipment for a heat pump dryer.

[0006] According to a first aspect of the embodiments of this application, the present application provides a control method for a heat pump dryer, comprising: obtaining the current moisture content of clothes in the drum of the heat pump dryer; determining the drying stage of the clothes based on the current moisture content, wherein the drying stage includes an early drying stage, a middle drying stage, and a late drying stage; and adjusting the operating parameters of the heat pump dryer based on the drying stage, wherein the operating parameters include motor speed, fan speed, and the start / stop status of the heating wire in the air duct.

[0007] The control method described above, wherein determining the drying stage of the clothing based on the current moisture content specifically includes: obtaining a first preset moisture content and a second preset moisture content, wherein the first preset moisture content is greater than the second preset moisture content; and determining the drying stage of the clothing based on the current moisture content, the first preset moisture content, and the second preset moisture content.

[0008] The control method described above, wherein determining the drying stage of the clothing based on the current moisture content, the first preset moisture content, and the second preset moisture content includes:

[0009] When the current moisture content is greater than or equal to the first preset moisture content, the drying stage of the clothing is determined to be the early drying stage.

[0010] When the current moisture content is between the first preset moisture content and the second preset moisture content, the drying stage of the clothing is determined to be the intermediate drying stage;

[0011] When the current moisture content is less than or equal to the second preset moisture content, the drying stage of the clothing is determined to be the later dryer stage.

[0012] The control method described above, wherein adjusting the operating parameters of the heat pump dryer according to the drying stage specifically includes:

[0013] When the clothes are in the initial drying stage, the motor speed is adjusted to the first motor speed range, the fan speed is adjusted to the first fan speed range, and the heating wire is adjusted to the heating state;

[0014] When the clothes are in the middle drying stage, the motor speed is adjusted to the second motor speed range, the fan speed is adjusted to the first fan speed range, and the start / stop status of the heating wire is adjusted according to the air outlet temperature of the drum. The speed in the second motor speed range is greater than the speed in the first motor speed range.

[0015] When the clothes are in the later drying stage, the motor speed is adjusted to the first motor speed range, the fan speed is adjusted to the second fan speed range, and the heating wire is adjusted to the stopped heating state. The speed in the first fan speed range is greater than the speed in the second fan speed range.

[0016] The control method described above, wherein adjusting the start / stop state of the heating wire according to the outlet air temperature of the drum specifically includes: obtaining the outlet air temperature of the drum; if the outlet air temperature is greater than or equal to a first preset temperature, adjusting the heating wire to a stopped heating state; if the outlet air temperature is less than or equal to a second preset temperature, adjusting the heating wire to a heating state, wherein the second preset temperature is less than the first preset temperature.

[0017] According to a second aspect of the embodiments of this application, an embodiment of this application provides a control device for a heat pump dryer, comprising:

[0018] The acquisition module is used to acquire the current moisture content of the tumble dryer clothes in the heat pump dryer;

[0019] The determination module is used to determine the drying stage of the clothes based on the current moisture content, wherein the drying stage includes an early drying stage, a middle drying stage, and a late drying machine stage.

[0020] The processing module is used to adjust the operating parameters of the heat pump dryer according to the drying stage, wherein the operating parameters include motor speed, fan speed and the start / stop status of the heating wire in the air duct.

[0021] In the control device described above, the confirmation module is specifically used to: obtain a first preset moisture content and a second preset moisture content, wherein the first preset moisture content is greater than the second preset moisture content; and determine the drying stage of the clothing based on the current moisture content, the first preset moisture content, and the second preset moisture content.

[0022] In the control device described above, the determination module is specifically used to: determine the drying stage of the clothes as the early drying stage when the current moisture content is greater than or equal to the first preset moisture content; determine the drying stage of the clothes as the mid-drying stage when the current moisture content is between the first preset moisture content and the second preset moisture content; and determine the drying stage of the clothes as the late drying stage when the current moisture content is less than or equal to the second preset moisture content.

[0023] In the control device described above, the processing module is specifically configured to: adjust the motor speed to a first motor speed range and the fan speed to a first fan speed range when the clothes are in the early drying stage, and adjust the heating wire to a heating state; adjust the motor speed to a second motor speed range and the fan speed to the first fan speed range when the clothes are in the middle drying stage, and adjust the on / off state of the heating wire according to the air outlet temperature of the drum, wherein the speed in the second motor speed range is greater than the speed in the first motor speed range; and adjust the motor speed to the first motor speed range and the fan speed to the second fan speed range when the clothes are in the late drying stage, and adjust the heating wire to a stopped heating state, wherein the speed in the first fan speed range is greater than the speed in the second fan speed range.

[0024] In the control device described above, the processing module is specifically used to: obtain the air outlet temperature of the drum; if the air outlet temperature is greater than or equal to a first preset temperature, adjust the heating wire to a stopped heating state; if the air outlet temperature is less than or equal to a second preset temperature, adjust the heating wire to a heating state, wherein the second preset temperature is less than the first preset temperature.

[0025] According to a third aspect of the present application, an embodiment of the present application provides a control device for a heat pump dryer, including at least one processor and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to cause the at least one processor to perform the method as described in any of the first aspects of the present application.

[0026] According to a fourth aspect of the embodiments of this application, an embodiment of this application provides a heat pump dryer, including: a housing, a drum, an air duct, a condenser, a fan, a motor, a heating wire, a fireproof protective plate, a detection device, and at least one processor; the drum is rotatably disposed in the housing, and the drum has a dry hot air inlet; the air duct includes a first portion connecting the air outlet of the condenser and the dry hot air inlet of the drum, and the fan is used to drive air to flow in the air duct and the drum; the fireproof protective plate is connected to the housing and together forms an installation space that can communicate with the first portion, the heating wire is located in the installation space, and the heating wire is fixed on the fireproof protective plate; the detection device is used to obtain the current moisture content of the clothes inside the drum;

[0027] The processor is used to determine the drying stage of the clothes based on the current moisture content detected by the detection device, and to adjust the operating parameters of the heat pump dryer according to the drying stage. The drying stage includes an early drying stage, a middle drying stage, and a late drying stage. The operating parameters include motor speed, fan speed, and the start / stop status of the heating wire.

[0028] As described above, the heat pump dryer has an air inlet on the rear panel of the housing that is directly opposite the hot dry air inlet, and the fan is mounted on the rear panel; the heat pump dryer includes a ventilation hood that covers the rear panel, and the ventilation hood and the rear panel together define a ventilation duct that connects the air inlet and the fan outlet of the fan.

[0029] The fireproof protective panel is installed in the ventilation duct. The fireproof protective panel includes a first enclosure wall, a third enclosure wall, and a second enclosure wall located between the first enclosure wall and the third enclosure wall. The second enclosure wall is perpendicularly connected to the first enclosure wall and the third enclosure wall. The first enclosure wall and the third enclosure wall are both connected to the rear side panel.

[0030] As described above, in the heat pump dryer, an upper guide plate is provided protruding upward from the upper end of the second enclosure wall, the upper guide plate extends obliquely, and the distance between the upper guide plate and the rear side plate gradually increases from bottom to top; a lower guide plate is provided protruding downward from the lower end of the second enclosure wall, the lower guide plate extends obliquely, and the distance between the lower guide plate and the rear side plate gradually increases from bottom to top.

[0031] As described above, in the heat pump dryer, the first enclosure wall has a first connecting edge protruding from one end away from the second enclosure wall and facing the third enclosure wall, and the third enclosure wall has a second connecting edge protruding from one end away from the second enclosure wall and facing the first enclosure wall. Both the first connecting edge and the second connecting edge are connected to the rear side panel.

[0032] According to a fifth aspect of the embodiments of this application, the embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any of the first aspects of the embodiments of this application.

[0033] According to a sixth aspect of the embodiments of this application, the embodiments of this application provide a computer program product, including a computer program that is executed by a processor as described in any of the first aspects of the embodiments of this application.

[0034] Those skilled in the art will understand that the control method, apparatus, and equipment of the heat pump dryer in the embodiments of this application obtain the current moisture content of the clothes in the drum, and infer the drying stage of the clothes from the current moisture content. The motor speed, fan speed, and the start / stop state of the heating wire are adjusted according to the drying stage, rather than simply controlling and adjusting the motor speed. The control strategy of the heat pump dryer is not singular, which is conducive to making the heat pump dryer achieve the best effect, thereby helping to improve the efficiency of the heat pump dryer while avoiding excessive energy consumption. Attached Figure Description

[0035] Preferred embodiments of the control method, apparatus, and equipment for a heat pump clothes dryer according to this application will be described below with reference to the accompanying drawings. The drawings are as follows:

[0036] Figure 1 This is a schematic diagram illustrating the principle of heat pump dryers in related technologies;

[0037] Figure 2 A schematic diagram illustrating the principle of a heat pump dryer provided in an embodiment of this application;

[0038] Figure 3 A flowchart illustrating a control method for a heat pump dryer provided in an embodiment of this application;

[0039] Figure 4A schematic flowchart illustrating another control method for a heat pump dryer provided in an embodiment of this application;

[0040] Figure 5 This is a schematic diagram of the control device for a heat pump dryer according to an embodiment of this application;

[0041] Figure 6 This is a schematic diagram of the control device for a heat pump dryer according to an embodiment of this application;

[0042] Figure 7 A rear view of a heat pump dryer provided in an embodiment of this application;

[0043] Figure 8 A perspective view of a heat pump dryer provided in an embodiment of this application;

[0044] Figure 9 This is a three-dimensional schematic diagram of the connection between the fireproof protective plate and the heating wire in an embodiment of this application. Detailed Implementation

[0045] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0046] Figure 1 This is a schematic diagram illustrating the principle of a heat pump dryer in related technologies. (Refer to...) Figure 1 The heat pump dryer 100 includes a housing 10, a drum 20, a motor 30, a fan 40, an air duct, and a heat pump system 50. At least the drum 20, motor 30, and heat pump system 50 are housed within the housing 10, which provides protection for them. The motor 30 drives the drum 20 to rotate, the drum 20 holds the clothes, and a hot and dry air inlet is located at the bottom of the drum 20. Figure 1 The middle part is located at the right end of the drum 20), and the drum opening of the drum 20 is provided with a hot and humid air outlet. Figure 1 Located at the left end of the drum 20, the air duct is connected to the drum 20, the fan 40 is used to drive the air to circulate in the air duct and the drum 20, and the heat pump system 50 is used to dry the clothes in the drum 20.

[0047] The heat pump system 50 includes a compressor 51, a condenser 52, and an evaporator 53. The hot and humid air outlet of the drum 20 is connected to the air inlet of the evaporator 53. The compressor 51 is located between the air outlet of the evaporator 53 and the air inlet of the condenser 52. The air outlet of the condenser 52 is connected to the dry and hot air inlet of the drum 20. The evaporator 53, the compressor 51, and the condenser 52 are connected in sequence to form a heat pump circuit for supplying refrigerant circulation.

[0048] The drying process of the heat pump dryer 100 is as follows: the humid air entering the air duct from the humid air outlet of the drum 20 enters the evaporator 53 through the air inlet of the evaporator 53 and exchanges heat with the refrigerant in the evaporator 53. The heat of the humid air is exchanged with the refrigerant in the evaporator 53, causing the refrigerant to heat up and vaporize. The water vapor in the humid air condenses into condensate due to the decrease in temperature and separates from the air under the action of gravity. The dry and cold air that has lost a large amount of water vapor is discharged from the air outlet of the evaporator 53 and then enters the condenser 52 through the air inlet of the condenser 52.

[0049] The refrigerant, after being heated and vaporized in the evaporator 53, becomes a high-temperature and high-pressure gas under the action of the compressor 51. It then flows into the condenser 52 and exchanges heat with the dehumidified dry and cold air. After absorbing a large amount of heat from the high-temperature and high-pressure gaseous refrigerant, the dry and cold air becomes dry and hot air and is discharged from the outlet of the condenser 52. Subsequently, it flows into the drum 20 from the dry and hot air inlet of the drum 20 to dry the clothes inside the drum 20.

[0050] Dry, hot air vaporizes the water in the wet clothes, becoming humid, hot air, which then re-enters the air duct from the humid, hot air outlet of drum 20, thus beginning the next cycle. The refrigerant that loses heat in condenser 52 flows back to evaporator 53 to begin the next cycle. In this way, the clothes are ultimately dried.

[0051] To improve the drying effect of clothes, the heat pump dryer 100 also includes a detection device and a controller electrically connected to the detection device. The detection device is used to detect the humidity of the clothes, and the controller controls the rotation speed of the drum 20 according to the humidity detected by the detection device. When the humidity of the clothes is high, the rotation speed of the drum 20 increases, so as to increase the contact area between the clothes and the hot air, thereby improving the drying efficiency of the clothes.

[0052] However, the humidity of the clothes changes greatly during the drying process. If the motor speed is only controlled according to the humidity of the clothes, the control strategy of the heat pump dryer 100 is relatively simple. The heat pump dryer 100 cannot achieve the best effect, resulting in low drying efficiency and high energy consumption.

[0053] In view of this, this application can consider coordinating the control of the motor, fan 40 and heating wire 60 according to the moisture content of the clothes, so that the operating state of the motor, fan 40 and heating wire 60 is adapted to the moisture content of the clothes, which is conducive to the heat pump dryer to achieve the best effect. Thus, the heat pump dryer has high drying efficiency and low energy consumption.

[0054] Figure 2 This is a schematic diagram illustrating the principle of a heat pump dryer provided in an embodiment of this application. Figure 3 This is a schematic flowchart illustrating a control method for a heat pump dryer provided in an embodiment of this application. (Refer to...) Figure 2 and Figure 3 This embodiment provides a control method for a heat pump dryer. This control method is mainly applied to the entire drying process of the heat pump dryer 100. It is used to detect the moisture content of the clothes in the drum 20 of the heat pump dryer 100 and control the heat pump dryer 100 according to the moisture content.

[0055] The execution subject of the control method for the heat pump dryer provided in this application embodiment can be the heat pump dryer 100, or a control device capable of controlling the heat pump dryer, such as a server or terminal device. The following embodiments use the heat pump dryer 100 as an example to illustrate the control method for the heat pump dryer provided in this application embodiment.

[0056] The control method for the heat pump dryer provided in this embodiment mainly includes the following steps:

[0057] Step 101: Obtain the current moisture content of the tumble dryer garment in the heat pump dryer.

[0058] The clothes inside drum 20 are clothes to be dried. Moisture content refers to the ratio of the water content in the clothes to their weight. Specifically, the possible steps to obtain the current moisture content of the clothes inside drum 20 of the heat pump dryer 100 may include the following steps 1-2:

[0059] Step 1: Obtain the weight and humidity of the inner garment in the roller.

[0060] This step can be achieved through an acquisition module. Specifically, the acquisition module may include a humidity sensor and a weighing sensor. The humidity sensor can be installed inside the drum 20 or at the humid air outlet of the drum 20 to collect the humidity of the clothes. The weighing sensor can be installed on the outer wall of the drum 20 to collect the total weight of the drum 20 and the clothes to be dried inside the drum 20. The weight of the drum 20 is constant; the weight of the clothes is obtained by subtracting the weight of the drum 20 from the total weight detected by the weighing sensor.

[0061] Of course, the humidity sensor can also be replaced with a metal strip electrode. The metal strip electrode is used to detect the impedance value of clothing. Since the impedance value of clothing is proportional to the humidity, the metal strip electrode can also detect the humidity of clothing.

[0062] Step 2: Determine the current moisture content of the clothing based on its weight and humidity.

[0063] As mentioned above, moisture content refers to the ratio of the water content in the clothes to be dried to the weight of the clothes. Therefore, by comparing the obtained humidity of the clothes with the weight of the clothes, the ratio is the current moisture content of the clothes.

[0064] Step 102: Determine the drying stage of the clothes based on the current moisture content. The drying stage includes the initial drying stage, the intermediate drying stage, and the final dryer stage.

[0065] It's understandable that the heat pump dryer 100 sequentially enters three drying stages: the initial drying stage, the middle drying stage, and the final drying stage. During the initial drying stage, the clothes are dried for a shorter time, resulting in a higher moisture content. In the final drying stage, the clothes are dried for a longer time, resulting in a lower moisture content. The moisture content of the clothes in the middle drying stage falls between that of the initial and final drying stages. Therefore, the moisture content of the clothes changes during the drying process, and analyzing this moisture content allows for accurate determination of the current drying stage.

[0066] Specifically, a possible way to determine the drying stage of clothing based on the current moisture content is as follows: obtain a first preset moisture content and a second preset moisture content; determine the drying stage of clothing based on the current moisture content, the first preset moisture content, and the second preset moisture content. The first preset moisture content is greater than the second preset moisture content.

[0067] In one example, the first preset moisture content and the second preset moisture content can be obtained through multiple experimental analyses and can be preset in the processor of the heat pump dryer 100. In this case, the heat pump dryer 100 can directly obtain the preset first and second preset moisture contents. For example, the first preset moisture content can be 60%, and the second preset moisture content can be 10%.

[0068] In another example, after obtaining the current moisture content of the clothes, the heat pump dryer 100 can also obtain the first preset moisture content and the second preset moisture content through the following steps 1-3.

[0069] Step 1: Obtain historical data sets of the heat pump dryer within a historical time period. The historical data sets are the historical moisture content of the clothes and the corresponding time for each run of the heat pump dryer.

[0070] For example, during the historical period, the heat pump dryer 100 reports the current moisture content to the server during the drying process. The server obtains the moisture content reported by the heat pump dryer 100 and stores it as the historical moisture content. At the same time, the server records the reporting time, which is the moment corresponding to the historical moisture content.

[0071] The historical data period is unlimited; for example, it could be one month. This means the server can retrieve historical data sets of the heat pump dryer 100 operating over the past month. In other words, if a user used the heat pump dryer 100 twice in the past month to dry clothes, the server could retrieve two historical data sets.

[0072] Step 2: Sort the historical moisture content of each historical data group in chronological order, obtain the first initial moisture content corresponding to the moment after a first preset time in each historical data group, and obtain the second initial moisture content corresponding to the moment after a second preset time in each historical data group. The first preset time is shorter than the second preset time.

[0073] The purpose of this step is to analyze past data from the heat pump dryer 100 to obtain the first initial moisture content of the clothes during the first preset drying time and the second initial moisture content of the clothes during the second preset drying time. The first preset time can be understood as the approximate time required to complete the initial drying stage of the heat pump dryer 100, and the second preset time can be understood as the approximate time required to complete the intermediate drying stage of the heat pump dryer 100.

[0074] The first and second preset durations can be designed based on practical experience and can be preset by updating the program code of the heat pump dryer 100. Furthermore, the first and second preset durations are related to the total operating time of the heat pump dryer 100. For example, if the total operating time of the heat pump dryer 100 is 45 minutes, the first preset duration can be 10 minutes and the second preset duration can be 30 minutes.

[0075] It should also be noted that the initial time refers to the earliest recorded time in each historical data set. For example, if a historical data set is obtained and arranged in chronological order as shown in Table 1, the initial time is 15:03. Taking a first preset duration of 10 minutes and a second preset duration of 30 minutes as an example, the first initial moisture content is 70%, and the second initial moisture content is 30%.

[0076] Table 1

[0077] time 15：03 15：08 15：13 15：18 15：23 Moisture content 90％ 80％ 70％ 60％ 50％ time 15：28 15：33 15：38 15：43 15：48 Moisture content 40％ 30％ 20％ 10％ 2％

[0078] The heat pump dryer 100 has multiple operating modes, such as quick drying mode, standard drying mode, and wool drying mode. When the user selects an operating mode, the heat pump dryer 100 executes the program corresponding to that mode, and the total operating time of the heat pump dryer 100 is fixed. Furthermore, the total operating time of the heat pump dryer 100 varies depending on the operating mode used.

[0079] Therefore, the time required to finish the initial drying stage and the time required to finish the intermediate drying stage of the heat pump dryer 100 are different under different operating modes, and the first preset time and the second preset time corresponding to different operating modes can also be different.

[0080] Furthermore, before sorting the historical moisture content of each historical data group in chronological order, the historical data groups can be classified first. Specifically, the historical data groups obtained by the heat pump dryer 100 operating in the same mode are divided into the same category. Then, when obtaining the first initial moisture content and the second initial moisture content, the historical data groups of the same category use the same first preset duration and the same second preset duration, while the historical data groups of different categories use different first preset durations and second preset durations.

[0081] Step 3: Take the average of all first initial moisture contents as the first preset moisture content, and take the average of all second initial moisture contents as the second preset moisture content.

[0082] This step involves taking the average moisture content of the clothes when the heat pump dryer 100 has been running for a first preset duration over a historical period as the first preset moisture content, and the average moisture content of the clothes when it has been running for a second preset duration as the second preset moisture content. The first and second preset moisture contents are used as parameters to determine the drying stage of the clothes.

[0083] With this setting, compared to directly presetting the first and second preset moisture contents, this example analyzes the historical data of the heat pump dryer 100 to calculate the first and second preset moisture contents, which can then be used to more accurately determine the drying stage of the clothes.

[0084] After obtaining the first preset moisture content and the second preset moisture content, the drying stage of the clothes is determined based on the current moisture content, the first preset moisture content and the second preset moisture content.

[0085] Optionally, when the current moisture content of the clothing is greater than or equal to the first preset moisture content, the drying stage of the clothing is determined as the early drying stage.

[0086] Optionally, when the current moisture content of the clothing is between the first preset moisture content and the second preset moisture content, the drying stage of the clothing is determined to be the intermediate drying stage.

[0087] Optionally, when the current moisture content of the clothes is less than or equal to the second preset moisture content, the drying stage of the clothes is determined to be the later dryer stage.

[0088] Taking a first preset moisture content of 60% and a second preset moisture content of 10% as an example, when the current moisture content of the clothes is 70%, the drying stage of the clothes is the early drying stage; when the current moisture content of the clothes is 40%, the drying stage of the clothes is the middle drying stage; and when the current moisture content of the clothes is 10%, the drying stage of the clothes is the late drying stage.

[0089] Step 103: Adjust the operating parameters of the heat pump dryer according to the drying stage. The operating parameters include the motor speed, fan speed, and the start / stop status of the heating wire in the air duct.

[0090] It should be pointed out that, as Figure 2 As shown, the motor 30 is only connected to the drum 20 for transmission, so that the drum 20 can be driven independently. That is, in this embodiment, the drum 20 and the fan 40 of the heat pump dryer 100 are not driven by the same driver. In this way, the motor speed and the fan speed can be adjusted separately, and thus the rotation speed of the drum 20 and the air speed in the air duct can be adjusted separately.

[0091] The air duct includes a first part A1 that connects the air outlet of the condenser 52 to the dry hot air inlet of the drum 20, and the heating wire 60 is located in the first part A1 air duct. When the dry hot air discharged from the air outlet of the condenser 52 flows through the heating wire 60, it can be reheated, so that the temperature of the dry hot air flowing into the drum 20 increases again, thereby accelerating the drying speed and improving the drying efficiency.

[0092] Optionally, when the clothes are in the initial drying stage, the motor speed is adjusted to the first motor speed range, the fan speed is adjusted to the first fan speed range, and the heating wire 60 is adjusted to the heating state.

[0093] Optionally, when the clothes are in the middle drying stage, the motor speed is adjusted to the second motor speed range, the fan speed is adjusted to the first fan speed range, and the start / stop status of the heating wire 60 is adjusted according to the air outlet temperature of the drum 20. The speed in the second motor speed range is greater than the speed in the first motor speed range.

[0094] Optionally, when the clothes are in the later drying stage, the motor speed is adjusted to the first motor speed range, the fan speed is adjusted to the second fan speed range, and the heating wire 60 is adjusted to the off state. The speed in the first fan speed range is greater than the speed in the second fan speed range.

[0095] This embodiment does not restrict the speed range of the first motor and the speed range of the second motor, as long as the speed range of the first motor is less than that of the second motor. Similarly, this embodiment does not restrict the speed range of the first fan and the speed range of the second fan, as long as the speed range of the first fan is greater than that of the second fan.

[0096] For example, the speed range of the first motor can be 40rpm to 60rpm, the speed range of the second motor can be 60rpm to 75rpm, the speed range of the first fan can be 1100rpm to 1400rpm, and the speed range of the second fan can be 700rpm to 1100rpm.

[0097] As described above, during the initial drying stage, motor 30 operates at a relatively low speed, while fan 40 operates at a relatively high speed. This results in the highest humidity level for the clothes. Increasing the fan speed accelerates air circulation, allowing hot, dry air to flow into drum 20 more quickly, thus improving drying efficiency. Simultaneously, because the clothes are at their highest humidity, the air driven by fan 40 quickly removes water. Therefore, setting drum 20 to a low speed ensures drying efficiency while avoiding excessive energy consumption of the heat pump dryer. Furthermore, smoother airflow within drum 20 allows for faster expulsion of hot, humid air. Additionally, during the initial drying stage, the heat pump system 50 is in its initial phase, and the temperature of the hot, dry air rises slowly. Adjusting heating wire 60 to heating mode accelerates the temperature rise, further improving drying efficiency.

[0098] During the mid-drying stage, both motor 30 and fan 40 operate at relatively high speeds. As a result, the clothes are quite moist, with water molecules primarily present at the contact points. Increasing the fan speed improves air circulation, thus enhancing drying efficiency. Furthermore, increasing the motor speed causes the drum to rotate at high speed, shaking and separating the clothes. This allows hot, dry air to reach between the clothes, ensuring the contact areas are dried, further improving drying efficiency.

[0099] During the later stages of drying, both motor 30 and fan 40 operate at relatively low speeds. As a result, the moisture content of the clothes is low, with water molecules primarily present on the fabric fibers. Even if hot, dry air with a high wind speed is introduced into the drum, it cannot remove the water molecules from the fabric fibers. Therefore, reducing the speed of both the fan and motor helps the heat pump system to still dry the clothes while avoiding excessive energy consumption in the heat pump dryer. Furthermore, during the later stages of drying, the moisture content of the clothes has significantly decreased, and the temperature drop of the hot, dry air flowing into the drum 20 from the hot, dry air inlet is significantly reduced. This results in a noticeable increase in the temperature of the hot, humid air exiting the drum 20 from the hot, humid air outlet. By adjusting the heating wire 60 to a non-heating state, it no longer reheats the hot, dry air, thus helping to lower the temperature of the hot, humid air entering the evaporator 53. This, in turn, helps to lower the exhaust temperature of the compressor 51, preventing the compressor 51 from operating under high load and frequently starting and stopping.

[0100] Figure 4 This is a schematic flowchart illustrating another control method for a heat pump dryer provided in an embodiment of this application. (Refer to...) Figure 4 In the above embodiment, when the clothes are in the middle drying stage, the specific implementation process of adjusting the start / stop state of the heating wire 60 according to the air outlet temperature of the drum 20 is as follows:

[0101] Step 201: Obtain the outlet air temperature of the drum.

[0102] Specifically, the air duct also includes a second part A2 that connects the hot and humid air outlet of the drum 20 with the air inlet of the evaporator 53. A temperature sensor is provided at the hot and humid air outlet of the drum 20 or in the second part A2. The temperature sensor is used to detect the air outlet temperature of the drum 20.

[0103] Step 202: If the outlet air temperature is greater than or equal to the first preset temperature, adjust the heating wire to the stop heating state.

[0104] Step 203: If the air outlet temperature is less than or equal to the second preset temperature, adjust the heating wire to the heating state, and the second preset temperature is less than the first preset temperature.

[0105] For example, the heat pump dryer 100 can first compare the outlet air temperature with a first preset temperature. When the outlet air temperature is not lower than the first preset temperature, the heating wire 60 is controlled to stop heating. When the outlet air temperature is lower than the first preset temperature, the outlet air temperature is then compared with a second preset temperature. When the outlet air temperature is not higher than the second preset temperature, the heating wire 60 is controlled to heat.

[0106] In other embodiments, the heat pump dryer 100 may first compare the outlet air temperature with a second preset temperature. If the outlet air temperature is not greater than the second preset temperature, the heating element 60 is controlled to heat. If the outlet air temperature is greater than the second preset temperature, the outlet air temperature is then compared with a first preset temperature. If the outlet air temperature is not less than the first preset temperature, the heating element 60 is controlled to stop heating. Of course, the heat pump dryer 100 may also simultaneously compare the outlet air temperature with both the first and second preset temperatures, and then execute step 202 or step 203 based on the comparison result.

[0107] It can also be understood that if the outlet air temperature is between the second preset temperature and the first preset temperature, the heating wire 60 can be in a heating state, or the heating wire 60 can be in a non-heating state. In this case, the heat pump dryer 100 relies solely on the heat pump system 50 to dry the clothes. The first and second preset temperatures are not limited; for example, the first preset temperature can be 75℃ and the second preset temperature can be 70℃.

[0108] With the above settings, when the clothes are in the middle drying stage, the air outlet temperature of the drum 20 can be maintained between the second preset temperature and the first preset temperature to prevent the temperature inside the drum 20 from being too high or too low.

[0109] In summary, the control method for the heat pump dryer provided in this application embodiment obtains the current moisture content of the clothes in the drum 20, and infers the drying stage of the clothes from the current moisture content. Based on the drying stage, the motor speed, fan speed, and the start / stop state of the heating wire are adjusted, rather than simply controlling and adjusting the motor speed. The control strategy of the heat pump dryer 100 is not singular, which is conducive to making the heat pump dryer 100 achieve the best effect, thereby helping to improve the efficiency of the heat pump dryer 100 while avoiding excessive energy consumption.

[0110] It should be understood that although the above method embodiments are illustrated using a heat pump dryer 100 as an example, the above method embodiments can also be implemented by a control device capable of controlling the heat pump dryer. When implemented by a control device, the control device can perform the above processing based on the current moisture content of the clothes and control the heat pump dryer 100 to adjust the corresponding parameters, which will not be elaborated further.

[0111] Figure 5 This is a schematic diagram of the control device for a heat pump dryer according to an embodiment of this application, as shown below. Figure 5 As shown, the control device 200 for the heat pump dryer provided in this embodiment includes:

[0112] The acquisition module 201 is used to acquire the current moisture content of the clothes in the drum 20 of the heat pump dryer 100;

[0113] The determination module 202 is used to determine the drying stage of the clothes based on the current moisture content. The drying stage includes an early drying stage, a middle drying stage, and a late drying stage.

[0114] The processing module 203 is used to adjust the operating parameters of the heat pump dryer 100 according to the drying stage. The operating parameters include the motor speed, the fan speed, and the start / stop status of the heating wire 60 in the air duct.

[0115] Optionally, the confirmation module 202 is specifically used to obtain a first preset moisture content and a second preset moisture content, wherein the first preset moisture content is greater than the second preset moisture content; and to determine the drying stage of the clothes based on the current moisture content, the first preset moisture content and the second preset moisture content.

[0116] Optionally, the confirmation module 202 is specifically used to: determine the drying stage of the clothes as the early drying stage when the current moisture content is greater than or equal to the first preset moisture content; determine the drying stage of the clothes as the mid-drying stage when the current moisture content is between the first preset moisture content and the second preset moisture content; and determine the drying stage of the clothes as the late drying stage when the current moisture content is less than or equal to the second preset moisture content.

[0117] Optionally, the processing module 203 is specifically used to adjust the motor speed to the first motor speed range, adjust the fan speed to the first fan speed range, and adjust the heating wire 60 to the heating state when the clothes are in the early drying stage.

[0118] Optionally, the processing module 203 is specifically used to adjust the motor speed to the second motor speed range and the fan speed to the first fan speed range when the clothes are in the middle drying stage, and to adjust the start and stop status of the heating wire 60 according to the air outlet temperature of the drum 20. The speed in the second motor speed range is greater than the speed in the first motor speed range.

[0119] Optionally, the processing module 203 is specifically used to adjust the motor speed to the first motor speed range, adjust the fan speed to the second fan speed range, and adjust the heating wire 60 to the stopped heating state when the clothes are in the later drying stage. The speed in the first fan speed range is greater than the speed in the second fan speed range.

[0120] Optionally, the processing module 203 is specifically used to obtain the air outlet temperature of the drum 20; if the air outlet temperature is greater than or equal to the first preset temperature, the heating wire 60 is adjusted to a stopped heating state; if the air outlet temperature is less than or equal to the second preset temperature, the heating wire 60 is adjusted to a heating state, and the second preset temperature is less than the first preset temperature.

[0121] The control device 200 of the heat pump dryer provided in this embodiment is configured as follows: Figure 5The connection method is shown. For related instructions, please refer to [link / reference needed]. Figure 3 and Figure 4 The relevant descriptions and effects of the steps in the corresponding embodiments are understood, and will not be elaborated on here.

[0122] Figure 6 This is a schematic diagram of the control device for a heat pump clothes dryer according to an embodiment of this application. Figure 6 As shown, the control device for the heat pump dryer provided in this embodiment includes: at least one processor 302 and a memory 301 communicatively connected to the at least one processor 302. The memory 301 stores instructions executable by the at least one processor 302. The instructions are executed by the at least one processor 302 to implement the control method of the heat pump dryer in this embodiment. The specific implementation principle can be found in the above embodiments, and will not be repeated here. The control device for the heat pump dryer may also include an input / output interface 303. The input / output interface 303 may include independent output and input interfaces, or it may be an integrated interface that integrates input and output. The output interface is used to output data, and the input interface is used to acquire input data.

[0123] For example, the control device for the heat pump dryer may be a server capable of controlling the heat pump dryer 100, or a terminal device capable of controlling the heat pump dryer 100.

[0124] Figure 7 This is a rear view of the heat pump dryer provided in an embodiment of this application. Figure 8 This is a perspective view of a heat pump dryer provided in an embodiment of this application. (In conjunction with...) Figure 2 , Figure 7 and Figure 8 One embodiment of this application provides a heat pump dryer 100, which includes a housing 10, a drum 20, a motor 30, a fan 40, an air duct, and a heat pump system 50. The motor 30 is connected to the drum 20 to drive the drum 20 to rotate inside the housing 10. The bottom of the drum 20 is provided with a dry hot air inlet, and the opening of the drum 20 is provided with a humid hot air outlet. The air duct is connected to the drum 20. The fan 40 is used to drive air to circulate in the air duct and the drum 20. The heat pump system 50 is used to dry the clothes inside the drum 20.

[0125] The heat pump system 50 includes a compressor 51, a condenser 52, and an evaporator 53. The hot and humid air outlet of the drum 20 is connected to the air inlet of the evaporator 53. The compressor 51 is located between the air outlet of the evaporator 53 and the air inlet of the condenser 52. The air outlet of the condenser 52 is connected to the dry and hot air inlet of the drum 20. The evaporator 53, the compressor 51, and the condenser 52 are connected in sequence to form a heat pump circuit for supplying refrigerant circulation.

[0126] The heat pump system 50 can be set at any position on the outer periphery of the drum 20. Considering the large weight of the heat pump system 50, it can be set at the bottom of the drum 20 to prevent it from falling due to insecure support.

[0127] exist Figure 2 The air duct comprises a first part A1, a second part A2, and a third part A3. The first part A1 connects the outlet of the condenser 52 to the dry hot air inlet of the drum 20. The second part A2 connects the outlet of the drum 20 to the inlet of the evaporator 53. The third part A3 connects the outlet of the evaporator 53 to the inlet of the condenser 52. Based on the above, it can be seen that the first part A1, the dry hot air inlet of the drum 20, the inside of the drum 20, the outlet of the drum 20, the second part A2, and the third part A3 are sequentially connected.

[0128] The heat pump dryer 100 also includes a heating wire 60, a detection device, and at least one processor. The heating wire 60 is disposed in the first part A1 of the air duct and is powered by a circuit. When the dry and hot air discharged from the outlet of the condenser 52 flows through the heating wire 60, it can be reheated. The detection device is used to obtain the current moisture content of the clothes in the drum 20. The processor is used to determine the drying stage of the clothes according to the current moisture content detected by the detection device, and adjust the operating parameters of the heat pump dryer 100 according to the drying stage. The drying stage includes an early drying stage, a middle drying stage, and a late drying stage. The operating parameters include the motor speed, the fan speed, and the start / stop status of the heating wire 60.

[0129] With this configuration, the heat pump dryer 100 can coordinately control the motor 30, fan 40, and heating wire 60 according to the moisture content of the clothes, so that the operating status of the motor 30, fan 40, and heating wire 60 are adapted to the moisture content of the clothes. This helps the heat pump dryer 100 to achieve the best effect, thus the heat pump dryer 100 has high drying efficiency and low energy consumption.

[0130] Specifically, the heat pump dryer 100 also includes a fireproof protective plate 80. The fireproof protective plate 80 is connected to the housing 10 and together they form an installation space that can communicate with the first part A1. The heating wire 60 is located within the installation space and is fixed to the fireproof protective plate 80. In other words, the fireproof protective plate 80 is located in the first part A1 and connected to the housing 10, and the heating wire 60 is fixed to the fireproof protective plate 80. In this way, the fireproof protective plate 80 can play a protective role, which helps to prevent sparks from forming when the heating wire 60 overheats, thus preventing the sparks from heating the housing 10 and causing heat damage to the housing 10.

[0131] In the first feasible approach, the first portion A1 of the air duct can be located within the housing 10. Specifically, the heat pump dryer 100 may further include an air guide plate disposed within the housing 10, and the air guide plate is connected to the housing 10 and together encloses the first portion A1. In this example, a fireproof protective panel 80 is also disposed within the housing 10 and connected to the inner side of the housing 10.

[0132] In the second possible approach, such as Figure 7 and Figure 8 As shown, the first part A1 includes a first segment and a second segment connected in sequence. The first segment is located inside the enclosure 10, and the second segment is located outside the enclosure 10. In this example, the fireproof panel 80 can be installed inside the second segment and connected to the outer side of the enclosure 10.

[0133] Specifically, the rear panel 11 of the housing 10 has an air inlet directly opposite the dry hot air inlet of the drum 20. The fan 40 is mounted on the rear panel 11. The heat pump dryer 100 includes a ventilation hood 70, which covers the rear panel 11. The ventilation hood 70 and the rear panel 11 together define a connecting ventilation duct that connects the air inlet and the fan outlet of the fan 40. This connecting ventilation duct is the second section. Correspondingly, the air outlet of the condenser 52 and the fan inlet of the fan 40 form the first section of the first part A1.

[0134] When the heat pump dryer 100 is working, the fan 40 drives the dry hot air flowing out of the air outlet of the condenser 52 to flow from the fan outlet into the ventilation hood 70, and then from the ventilation hood 70 into the air inlet of the housing 10. During this period, the heating wire 60 heats the dry hot air, causing the temperature of the dry hot air to rise. After that, the heated air flows into the drum 20 from the dry hot air inlet of the drum 20.

[0135] In the second possible method, the heating wire 60 is located outside the housing 10. In this way, when the temperature of the heating wire 60 is high, it is beneficial to avoid the high temperature affecting the performance of the heat pump system 50 installed inside the housing 10.

[0136] It should also be noted that the number of heating wires 60 is not limited. For example, there can be one heating wire or multiple heating wires 60. When there are multiple heating wires 60, all of them are fixed to the fireproof protective plate 80. By increasing the number of heating wires 60, the heat conducted to the air by the heating wires 60 is increased, allowing the dry, hot air flowing through the heating wires 60 to heat up more quickly.

[0137] Figure 9 This is a three-dimensional schematic diagram of the connection between the fireproof protective plate and the heating wire in an embodiment of this application. Figure 9In the example shown, the fireproof panel 80 includes a first enclosure 81, a third enclosure 83, and a second enclosure 82 located between the first enclosure 81 and the third enclosure 83. The second enclosure 82 is perpendicularly connected to the first enclosure 81 and the third enclosure 83. Both the first enclosure 81 and the third enclosure 83 are connected to the rear panel 11 of the enclosure 10. When the fireproof panel 80 is installed on the enclosure 10, the second enclosure 82 is parallel to the rear panel 11 of the enclosure 10.

[0138] Continue to refer to Figure 9 The first enclosure 81, at its end opposite to the second enclosure 82, may have a protruding first connecting edge 810 facing the third enclosure 83. The third enclosure 83, at its end opposite to the second enclosure 82, may have a protruding second connecting edge 830 facing the first enclosure 81. Both the first connecting edge 810 and the second connecting edge 830 are connected to the rear side panel 11. By forming the first connecting edge 810 and the second connecting edge 830, the fireproof panel 80 can be more easily connected to the rear side panel 11, thus making the installation of the fireproof panel 80 more convenient.

[0139] The connection method between the first connecting edge 810 and the second connecting edge 830 and the housing 10 is not limited. Preferably, both the first connecting edge 810 and the second connecting edge 830 are detachably connected to the rear panel 11 of the housing 10, so that the fireproof guard plate 80 can be removed from the housing 10 for easy maintenance of the heat pump dryer 100. For example, the first connecting edge 810 is provided with a connecting through hole, and the rear panel 11 is provided with a screw hole, with the screw hole facing the connecting through hole, so that the screw connector is threaded into the screw hole after passing through the connecting through hole.

[0140] The fireproof protective plate 80 and the heating wire 60 can be positioned anywhere in the second section; this embodiment does not impose any limitations on this. Preferably, the fireproof protective plate 80 can be positioned inside the ventilation housing 70 and near the fan outlet, that is, at the connection between the fan 40 and the ventilation housing 70. In this way, the heating wire 60 is also close to the fan outlet, so that the dry, hot air flowing out of the fan outlet can all pass through the heating wire 60, thereby enabling as much dry, hot air as possible to be reheated.

[0141] Furthermore, a lower guide plate 821 is provided at the lower end of the second enclosure 82, protruding downwards. The lower guide plate 821 extends obliquely, and the distance between the lower guide plate 821 and the rear side plate 11 gradually increases from bottom to top. With this arrangement, when the fireproof protective plate 80 is placed near the fan outlet, the lower guide plate 821 can come into contact with the fan outlet, and the lower guide plate 821 can guide the dry and hot air flowing out of the fan outlet into the ventilation hood 70.

[0142] Furthermore, an upper guide plate 820 is provided protruding upwards from the upper end of the second enclosure 82. The upper guide plate 820 extends obliquely, and the distance between the upper guide plate 820 and the rear side plate 11 gradually increases from bottom to top. By providing the upper guide plate 820, it can guide the air flowing through the heating wire 60 out of the installation space and towards the air inlet. It should be noted that at this time, there is a certain gap between the second enclosure 82 and the ventilation hood 70.

[0143] In the above embodiments, the fireproof protective plate 80 can be a metal plate, such as a steel plate or a galvanized plate. The fireproof protective plate 80 can also be a protective plate coated with fire-retardant paint. This embodiment does not limit this.

[0144] One embodiment of this application provides a computer-readable storage medium storing execution instructions. When at least one processor 302 of the control device of the heat pump dryer executes the execution instructions, the control method of the heat pump dryer in the above embodiment is implemented.

[0145] The computer-readable storage medium can be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0146] This application provides a computer program product, including a computer program that is executed by a processor 302 to implement this application. Figure 3 and Figure 4 The control method for a heat pump dryer provided in any of the corresponding embodiments.

[0147] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.

[0148] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module 203, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or in the form of hardware plus software functional modules.

[0149] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0150] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A control method for a heat pump clothes dryer, characterized in that, include: Obtain the current moisture content of the drum-loaded clothing in the heat pump dryer; The drying stage of the clothes is determined based on the current moisture content, wherein the drying stage includes an early drying stage, a middle drying stage, and a late drying stage. The drying stage is determined based on the current moisture content, a first preset moisture content, and a second preset moisture content. The first preset moisture content and the second preset moisture content are determined by sorting the historical moisture content of the heat pump dryer's historical data set in chronological order, and calculating the average of the first initial moisture content corresponding to all first preset durations and the average of the second initial moisture content corresponding to all second preset durations, respectively. The operating parameters of the heat pump dryer are adjusted according to the drying stage, wherein the operating parameters include motor speed, fan speed and the start / stop status of the heating wire in the air duct; The adjustment of the operating parameters of the heat pump dryer according to the drying stage specifically includes: When the clothes are in the initial drying stage, the motor speed is adjusted to the first motor speed range, the fan speed is adjusted to the first fan speed range, and the heating wire is adjusted to the heating state; When the clothes are in the middle drying stage, the motor speed is adjusted to the second motor speed range, the fan speed is adjusted to the first fan speed range, and the start / stop status of the heating wire is adjusted according to the air outlet temperature of the drum. The speed in the second motor speed range is greater than the speed in the first motor speed range. When the clothes are in the later drying stage, the motor speed is adjusted to the first motor speed range, the fan speed is adjusted to the second fan speed range, and the heating wire is adjusted to the stopped heating state. The speed in the first fan speed range is greater than the speed in the second fan speed range.

2. The control method according to claim 1, characterized in that, The step of determining the drying stage of the garment based on the current moisture content specifically includes: Obtain a first preset moisture content and a second preset moisture content, wherein the first preset moisture content is greater than the second preset moisture content; The drying stage of the garment is determined based on the current moisture content, the first preset moisture content, and the second preset moisture content.

3. The control method according to claim 2, characterized in that, Determining the drying stage of the clothing based on the current moisture content, the first preset moisture content, and the second preset moisture content includes: When the current moisture content is greater than or equal to the first preset moisture content, the drying stage of the clothing is determined to be the early drying stage. When the current moisture content is between the first preset moisture content and the second preset moisture content, the drying stage of the clothing is determined to be the intermediate drying stage; When the current moisture content is less than or equal to the second preset moisture content, the drying stage of the clothing is determined to be the later dryer stage.

4. The control method according to claim 1, characterized in that, The step of adjusting the on / off state of the heating wire according to the outlet air temperature of the drum specifically includes: Obtain the outlet air temperature of the roller; If the outlet air temperature is greater than or equal to the first preset temperature, the heating wire is adjusted to a stop heating state; If the outlet air temperature is less than or equal to the second preset temperature, the heating wire is adjusted to a heating state, where the second preset temperature is less than the first preset temperature.

5. A control device for a heat pump clothes dryer, characterized in that, include: The acquisition module is used to acquire the current moisture content of the tumble dryer clothes in the heat pump dryer; The determination module is used to determine the drying stage of the clothes based on the current moisture content. The drying stage includes an early drying stage, a middle drying stage, and a late drying stage. The drying stage is determined based on the current moisture content, a first preset moisture content, and a second preset moisture content. The first preset moisture content and the second preset moisture content are determined by sorting the historical moisture content of the heat pump dryer's historical data group in historical time intervals in chronological order, and calculating the average value of the first initial moisture content corresponding to all first preset time intervals and the average value of the second initial moisture content corresponding to all second preset time intervals, respectively. The processing module is used to adjust the operating parameters of the heat pump dryer according to the drying stage, wherein the operating parameters include motor speed, fan speed and the start / stop status of the heating wire in the air duct; The processing module is specifically used for: When the clothes are in the initial drying stage, the motor speed is adjusted to the first motor speed range, the fan speed is adjusted to the first fan speed range, and the heating wire is adjusted to the heating state; When the clothes are in the middle drying stage, the motor speed is adjusted to the second motor speed range, the fan speed is adjusted to the first fan speed range, and the start / stop status of the heating wire is adjusted according to the air outlet temperature of the drum. The speed in the second motor speed range is greater than the speed in the first motor speed range. When the clothes are in the later drying stage, the motor speed is adjusted to the first motor speed range, the fan speed is adjusted to the second fan speed range, and the heating wire is adjusted to the stopped heating state. The speed in the first fan speed range is greater than the speed in the second fan speed range.

6. A control device for a heat pump clothes dryer, characterized in that, include: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to cause the at least one processor to perform the method according to any one of claims 1-4.

7. A heat pump clothes dryer, characterized in that, include: The enclosure, rollers, air duct, condenser, fan, motor, heating wire, fireproof protective plate, detection device, and at least one processor; The roller is rotatably mounted inside the chamber, and the roller has a dry hot air inlet; The air duct includes a first part that connects the air outlet of the condenser with the dry hot air inlet of the drum, and the fan is used to drive air to flow in the air duct and the drum; The fireproof protective plate is connected to the box body and together they form an installation space that can communicate with the first part. The heating wire is located in the installation space and is fixed to the fireproof protective plate. The detection device is used to obtain the current moisture content of the roller underwear fabric; The processor is used to determine the drying stage of the clothes based on the current moisture content detected by the detection device, and to adjust the operating parameters of the heat pump dryer according to the drying stage. The drying stage includes an early drying stage, a middle drying stage, and a late drying stage. The operating parameters include motor speed, fan speed, and the start / stop status of the heating wire.

8. The heat pump dryer according to claim 7, characterized in that, The rear panel of the housing is provided with an air inlet that is directly opposite the dry hot air inlet, and the fan is installed on the rear panel. The heat pump dryer includes a ventilation hood, which is mounted on the rear side panel, and the ventilation hood and the rear side panel together define a ventilation duct that connects the air inlet and the fan outlet. The fireproof protective panel is installed in the ventilation duct. The fireproof protective panel includes a first enclosure wall, a third enclosure wall, and a second enclosure wall located between the first enclosure wall and the third enclosure wall. The second enclosure wall is perpendicularly connected to the first enclosure wall and the third enclosure wall. The first enclosure wall and the third enclosure wall are both connected to the rear side panel.

9. The heat pump dryer according to claim 8, characterized in that, The upper end of the second enclosure is provided with an upward protruding upper guide plate, the upper guide plate extends obliquely, and the distance between the upper guide plate and the rear side plate gradually increases from bottom to top; The lower end of the second enclosure is provided with a downward protruding lower guide plate, which extends at an angle and the distance between the lower guide plate and the rear side plate gradually increases from bottom to top.

10. The heat pump dryer according to claim 8, characterized in that, The first enclosure wall has a first connecting edge protruding from one end away from the second enclosure wall and facing the third enclosure wall. The third enclosure wall has a second connecting edge protruding from one end away from the second enclosure wall and facing the first enclosure wall. Both the first connecting edge and the second connecting edge are connected to the rear side panel.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-4.

12. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1-4.

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