A semi-open heat pump clothes dryer and system, control method, and storage medium

Abstract

The application relates to a semi-open heat pump clothes dryer and system, a control method and a storage medium, wherein a compressor is semi-intervened in a drying air duct, the compressor is only started in a drying process and is closed in other cases, the compressor inlet air is at an ambient temperature, generally at an indoor normal temperature, the compressor can be cooled, the air cooled by the compressor is mixed with pre-cooled air, the temperature of the air cooled by the compressor is close to that of the pre-cooled air, but the humidity is much lower than that of the pre-cooled air, therefore, the mixed air can effectively reduce the wet load of the heat pump system, and meanwhile, temperature rise is not caused. In order to prevent the state point of the mixed air from being uncontrollable, a two-stage dehumidification scheme is adopted, pre-cooling treatment is carried out before the air is mixed, and deep dehumidification is carried out after the air is mixed. In different drying stages, different operation modes are selected, and the optimal energy efficiency is realized. The application effectively utilizes the waste heat of the compressor, realizes sensible heat recovery, and the overall efficiency is better than that of a conventional heat pump system.

Description

Technical Field

[0001] This invention relates to the field of heat pump dryer technology, and particularly to a semi-open heat pump dryer and system, control method, and storage medium. Background Technology

[0002] A clothes dryer is a household appliance that uses electric heating to instantly evaporate the moisture from washed clothes. It is especially useful in northern winters and in the humid, rainy seasons of the south where clothes are difficult to dry. In addition, clothes dryers are widely used in industrial production to dry fabrics and improve production efficiency.

[0003] In clothes dryers, heat pump technology is the most efficient way to save energy during the drying process, and therefore it is widely used.

[0004] As the heat pump system operates, the compressor's exhaust temperature increases, causing the air in the sealed duct to absorb more and more heat. This results in the air entering the drying chamber becoming increasingly hot. When the temperature exceeds the clothing's temperature limit, it can damage the clothing. In addition, excessively high exhaust temperatures can affect the compressor's lifespan, and excessively high condensing temperatures can reduce the compressor's efficiency.

[0005] To ensure system energy efficiency and operational safety and reliability, the current common practice is to install an auxiliary fan in the refrigerant circulation loop. When the compressor's exhaust temperature is detected to be higher than the upper limit of the set range, the auxiliary fan is activated to dissipate the excess heat into the environment, thereby limiting the compressor's exhaust temperature within the set range and indirectly maintaining the intake air temperature of the drying chamber. However, this method results in energy waste. Summary of the Invention

[0006] In order to achieve the above-mentioned objectives and other advantages of the present invention, a first objective of the present invention is to provide a control method for a semi-open heat pump dryer system, comprising the following steps:

[0007] Determine whether the current working process of the heat pump dryer is the drying process;

[0008] If so, turn on the compressor;

[0009] Otherwise, shut down the compressor;

[0010] The opening degree of the first throttle valve is adjusted by monitoring the drying parameters; wherein, the first throttle valve is used to regulate the refrigerant flow from the condenser into the first evaporator, and the first evaporator dehumidifies the mixture of gas containing air cooled by the compressor.

[0011] Furthermore, the method includes the step of adjusting the opening degree of the second throttle valve based on the monitored drying parameters; wherein the second throttle valve is used to adjust the refrigerant flow rate from the first evaporator into the second evaporator, the second evaporator pre-cools the air flowing out of the drying chamber, and the first evaporator dehumidifies the mixture of the air cooled by the compressor and the air pre-cooled by the second evaporator.

[0012] Furthermore, adjusting the opening degree of the first throttle valve and the second throttle valve based on the monitored drying parameters includes the following steps:

[0013] Determine the current drying stage of the drying process;

[0014] Obtain the drying strategy corresponding to the current drying stage;

[0015] The opening degree of the first and second throttle valves is controlled by the obtained drying strategy;

[0016] If the collected drying parameter values ​​reach the target values ​​in the drying strategy corresponding to the current drying stage, then proceed to the next drying stage and control the next drying stage until the entire drying process is completed.

[0017] Furthermore, determining the current drying stage of the drying process includes the following steps:

[0018] Obtain the collected humidity values ​​of the clothing and / or the running time of the drying process;

[0019] Determine whether the collected clothing humidity value and / or the drying process running time have reached the preset value for the later stage of drying;

[0020] Otherwise, the current drying stage of the drying process is determined to be the early drying stage;

[0021] If so, the current drying stage of the drying process is determined to be the later stage of drying.

[0022] Furthermore, the drying strategy corresponding to the early stage of drying is to control the first throttle valve to throttle and control the second throttle valve to be fully open;

[0023] The drying strategy corresponding to the later stage of drying is to control the first throttle valve to be fully open and control the second throttle valve to throttle.

[0024] The target values ​​in the drying strategy corresponding to the pre-drying stage include target humidity values;

[0025] The target values ​​in the drying strategy corresponding to the later stage of drying include the target temperature value.

[0026] Furthermore, controlling the opening degree of the first and second throttle valves based on the acquired drying strategy includes the following steps:

[0027] When the current drying stage of the drying process is the early drying stage, the first throttle valve is controlled to throttle, and the second throttle valve is controlled to be fully open.

[0028] When the current drying stage of the drying process is the later stage of drying, the first throttle valve is fully opened and the second throttle valve is throttled.

[0029] Furthermore, if the collected drying parameter values ​​reach the target values ​​in the drying strategy corresponding to the current drying stage, then proceed to the next drying stage and control the next drying stage until the entire drying process is completed, including the following steps:

[0030] When the current drying stage of the drying process is the early drying stage, the humidity value of the clothes is collected;

[0031] Determine whether the collected humidity value of the clothes has reached the target humidity value in the drying strategy corresponding to the early stage of drying;

[0032] Otherwise, increase the opening degree of the first throttle valve, control the second throttle valve to be fully open, and jump to the point where the current drying stage of the drying process is the early drying stage, and collect the humidity value of the clothes;

[0033] Then it enters the later stage of drying, and the control of the later stage of drying is carried out;

[0034] When the current drying stage of the drying process is the later stage of drying, the temperature value of the clothes is collected;

[0035] Determine whether the collected clothing temperature value has reached the target temperature value in the corresponding drying strategy in the later stage of drying;

[0036] Otherwise, control the first throttle valve to be fully open, increase the opening degree of the second throttle valve, and jump to the point where the current drying stage of the drying process is the later stage of drying, and collect the temperature value of the clothes;

[0037] If yes, proceed to the next step.

[0038] Furthermore, the target value in the drying strategy corresponding to the later stage of drying also includes the target humidity value;

[0039] If the collected drying parameter values ​​reach the target values ​​in the drying strategy corresponding to the current drying stage, then proceed to the next drying stage and control the next drying stage until the entire drying process is completed. This process also includes the following steps:

[0040] When the current drying stage of the drying process is the later stage of drying, the humidity value of the clothes is collected;

[0041] Determine whether the collected humidity value of the clothes has reached the target humidity value in the corresponding drying strategy in the later stage of drying;

[0042] Otherwise, the temperature value of the clothes is collected, and it is determined whether the collected temperature value of the clothes reaches the target temperature value in the drying strategy corresponding to the later stage of drying; otherwise, the first throttle valve is fully opened, the opening degree of the second throttle valve is increased, and the process jumps to the point where the current drying stage of the drying process is the later stage of drying, and the humidity value of the clothes is collected; if yes, the first throttle valve is kept fully open, the current opening degree of the second throttle valve is kept or decreased, and the process jumps to the point where the current drying stage of the drying process is the later stage of drying, and the humidity value of the clothes is collected.

[0043] If yes, proceed to the next step.

[0044] A second objective of the present invention is to provide a computer-readable storage medium having program instructions stored thereon, which, when executed, implement a control method for a semi-open heat pump dryer system.

[0045] A third objective of this invention is to provide a semi-open heat pump dryer system, comprising: a compressor, a condenser, a first throttling valve, a first evaporator, and a controller. The compressor's air inlet pipe is connected to ambient air, the compressor's air outlet pipe is connected to the air inlet pipe of the first evaporator, the compressor's exhaust pipe is connected to the inlet of the condenser, the condenser's outlet is connected to the inlet of the first evaporator via the first throttling valve, the first evaporator's outlet is connected to the compressor's suction pipe, and the controller is used to execute a control method for a semi-open heat pump dryer system.

[0046] Furthermore, it also includes a second throttle valve and a second evaporator. The air outlet pipe of the compressor is connected to the connecting pipe between the first evaporator and the second evaporator. The outlet of the first evaporator is connected to the inlet of the second evaporator via the second throttle valve, and the outlet of the second evaporator is connected to the suction pipe of the compressor.

[0047] A fourth objective of the present invention is to provide a semi-open heat pump dryer, comprising a dryer body and a semi-open heat pump dryer system disposed within the dryer body.

[0048] Compared with the prior art, the beneficial effects of the present invention are:

[0049] This invention provides a semi-open heat pump dryer and system, control method, and storage medium. The compressor is partially integrated into the drying air duct. The compressor is only turned on during the drying process and turned off at other times. The compressor intake air is at ambient temperature, generally room temperature, which can ensure compressor cooling. The air cooled by the compressor is mixed with the pre-cooled air. The temperature of the air cooled by the compressor is close to that of the pre-cooled air, but the humidity is much lower than that of the pre-cooled air. Therefore, the mixing of air can effectively reduce the moisture load of the heat pump system without causing a temperature rise.

[0050] To prevent uncontrollable state points after compressor air mixing, this invention employs a two-stage dehumidification scheme: pre-cooling before air mixing and deep dehumidification after mixing. Different operating modes are selected for optimal energy efficiency at different drying stages. In the initial drying stage, when the moisture content of the clothes is highest, dehumidification efficiency is high. By controlling the first throttle valve to throttle and the second throttle valve to fully open, pre-cooling and dehumidification are performed simultaneously, maximizing the handling of the moisture load in the early stages of dehumidification. In the later drying stage, when the moisture content of the clothes is lower, dehumidification efficiency is relatively low. At this stage, temperature has a greater impact on drying efficiency than humidity. By controlling the first throttle valve to fully open and the second throttle valve to throttle, the condenser area is increased, and the outlet air temperature is raised, achieving zoned control of drying efficiency, reducing energy consumption in the drying process, and improving drying efficiency.

[0051] This invention effectively utilizes the waste heat of the compressor, achieving sensible heat recovery, and its overall efficiency is superior to that of conventional heat pump systems.

[0052] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0053] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0054] Figure 1 This is a schematic diagram of a semi-open heat pump dryer system according to Example 1;

[0055] Figure 2 This is a flowchart of a control method for a semi-open heat pump dryer system according to Example 3;

[0056] Figure 3 This is a flowchart of the two-stage dehumidification process in Example 3;

[0057] Figure 4 This is a schematic diagram of the electronic device in Example 4;

[0058] Figure 5 This is a block diagram of the computer-readable storage medium in Example 5.

[0059] In the attached diagram: 1. Compressor; 2. Condenser; 3. First expansion valve; 4. First evaporator; 5. Second expansion valve; 6. Second evaporator; 7. Drum; 8. Air outlet duct; 9. External exhaust duct. Detailed Implementation

[0060] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0061] Example 1

[0062] A semi-open heat pump dryer system, such as Figure 1 As shown, the system includes: a compressor 1, a condenser 2, a first throttling valve 3, a first evaporator 4, and a controller. The air inlet duct of the compressor 1 is connected to ambient air, the air outlet duct 8 of the compressor 1 is connected to the air inlet duct of the first evaporator 4, the exhaust pipe of the compressor 1 is connected to the inlet of the condenser 2, the outlet of the condenser 2 is connected to the inlet of the first evaporator 4 via the first throttling valve 3, and the outlet of the first evaporator 4 is connected to the suction pipe of the compressor 1. The compressor 1 is only turned on during the drying process and is not turned on during washing or other conditions. The compressor 1 is partially immersed in the drying air duct, and the air intake of the compressor 1 is at ambient temperature, generally room temperature, which ensures the cooling of the compressor. The controller is used to execute the control method of the semi-open heat pump dryer system. For a detailed description of the control method of the semi-open heat pump dryer system, please refer to the corresponding description in the following method embodiments.

[0063] To prevent the compressor 1 from becoming uncontrollable after mixing air, this embodiment employs a two-stage dehumidification scheme: pre-cooling before mixing air and deep dehumidification after mixing air. Therefore, the system also includes a second throttle valve 5 and a second evaporator 6. The air outlet pipe of the compressor 1 is connected to the connecting pipe between the first evaporator 4 and the second evaporator 6. The outlet of the first evaporator 4 is connected to the inlet of the second evaporator 6 via the second throttle valve 5, and the outlet of the second evaporator 6 is connected to the suction pipe of the compressor 1.

[0064] The system mixes the air cooled by the compressor 1 with the air pre-cooled by the second evaporator 6. The temperature of the air cooled by the compressor 1 is close to that of the pre-cooled air, but the humidity is much lower than that of the pre-cooled air. Therefore, the mixing of air can effectively reduce the moisture load of the heat pump system without causing the temperature to rise.

[0065] The refrigerant circuit consists of compressor 1, condenser 2, first expansion valve 3, first evaporator 4, second expansion valve 5, and second evaporator 6. Compressor 1 pressurizes and heats the refrigerant, which is then sent to condenser 2 to release heat. Condenser 2 is connected to the airflow inside the dryer, outputting hot, dry air. The refrigerant enters first expansion valve 3 from condenser 2. First expansion valve 3 is the transition point between high and low pressure; after passing through this component, the pressure and temperature rapidly decrease. The refrigerant then enters first evaporator 4 from first expansion valve 3, and then enters second evaporator 6 via second expansion valve 5, rapidly reducing pressure and temperature, absorbing heat energy, and reaching a temperature below the dew point. Evaporator 6 is connected to the drying airflow, transforming the humid, hot air into dry, cold air. Water vapor from the clothes condenses into small water droplets here and is collected in the condensation tray.

[0066] The condenser 2, first evaporator 4, and second evaporator 6 form an air circulation loop. The drying fan delivers hot air heated by the condenser 2 into the drum 7, where the clothes are heated and tumbled, accelerating the evaporation of moisture into water vapor (humid hot air). The drying filter captures lint and debris from the clothes, which then enters the second evaporator 6 for pre-cooling. Air cooled by the compressor 1 mixes with the pre-cooled air from the second evaporator 6. This mixed air undergoes deep dehumidification in the first evaporator 4, where moisture condenses into small droplets, becoming dry, cool air, which then continues into the condenser 2. The mixed air exits through the exhaust duct 9 at the outlet of the drum 7. The water vapor from the clothes, now condensed into droplets, is collected in a water collection tray. A drain pump pumps the condensate from the tray to a higher position, where it is stored in a water storage box. This process is repeated until the humidity sensor determines that the moisture content of the clothes has reached the set target, at which point the drying process ends.

[0067] This invention provides a semi-open heat pump dryer system that effectively utilizes the waste heat of the compressor, achieving sensible heat recovery and resulting in overall efficiency superior to conventional heat pump systems. Different operating modes are selected for optimal energy efficiency at different drying stages. For example, in the initial drying stage, when the moisture content of the clothes is at its highest, dehumidification efficiency is high. Therefore, by controlling the first throttling valve 3 to throttle and the second throttling valve 5 to fully open, pre-cooling and dehumidification are performed simultaneously, maximizing the handling of the moisture load in the early stages of dehumidification. In the later drying stage, when the moisture content of the clothes is lower, dehumidification efficiency is relatively low. At this time, temperature has a greater impact on drying efficiency than humidity. Therefore, by controlling the first throttling valve 3 to fully open and the second throttling valve 5 to throttle, the condenser area is increased, and the outlet air temperature is raised, achieving zoned control of drying efficiency for greater efficiency and energy saving.

[0068] Example 2

[0069] A semi-open heat pump dryer includes a dryer body and a semi-open heat pump dryer system disposed within the dryer body. For a detailed description of the semi-open heat pump dryer system, please refer to the corresponding description in the above system embodiments, which will not be repeated here.

[0070] Example 3

[0071] Example 1 describes a control method for a semi-open heat pump dryer system, such as... Figure 2 As shown, it includes the following steps:

[0072] Determine whether the current working process of the heat pump dryer is the drying process;

[0073] If so, turn on the compressor;

[0074] Otherwise, turn off the compressor;

[0075] By following the steps above, the compressor is controlled to only turn on during the drying process and not during washing or other similar activities.

[0076] The opening degree of the first throttle valve is adjusted based on the monitored drying parameters. This first throttle valve regulates the refrigerant flow from the condenser into the first evaporator, which dehumidifies the mixture containing air cooled by the compressor. Referring to the description in the system embodiment, the compressor inlet air is at ambient temperature, typically room temperature, ensuring compressor cooling. The air cooled by the compressor is mixed with the air in the first evaporator inlet duct. Since the humidity of the air cooled by the compressor is significantly lower than that of the air in the first evaporator inlet duct, this air mixing effectively reduces the moisture load of the heat pump system.

[0077] To prevent the compressor's state point from becoming uncontrollable after air mixing, this embodiment employs a two-stage dehumidification scheme: pre-cooling before air mixing and deep dehumidification after air mixing. Therefore, the method also includes the step of adjusting the opening degree of the second throttle valve based on monitored drying parameters. The second throttle valve regulates the refrigerant flow from the first evaporator to the second evaporator. The second evaporator pre-cools the air flowing out of the drying chamber (i.e., the drum), while the first evaporator dehumidifies the mixture of the compressor-cooled air and the pre-cooled air from the second evaporator. By mixing the compressor-cooled air with the pre-cooled air from the second evaporator, the temperature of the compressor-cooled air is close to that of the pre-cooled air, but the humidity is significantly lower. Therefore, air mixing effectively reduces the moisture load of the heat pump system without causing a temperature increase.

[0078] By monitoring the drying parameters, the opening degrees of the first and second throttle valves are adjusted to achieve two-stage dehumidification. Figure 3 As shown, it includes the following steps:

[0079] Determine the current drying stage of the drying process; specifically, this includes the following steps:

[0080] Obtain the collected humidity values ​​of the clothing and / or the running time of the drying process;

[0081] When the only parameter to be judged is the humidity value of the clothes, it is determined whether the collected humidity value of the clothes has reached the preset humidity value in the later stage of drying.

[0082] Otherwise, the current drying stage of the drying process is determined to be the early drying stage;

[0083] If so, the current drying stage of the drying process is determined to be the later stage of drying.

[0084] When the only parameter to be judged is the running time of the drying process, the judgment is made as to whether the running time of the drying process has reached the start time of the later stage of drying.

[0085] Otherwise, the current drying stage of the drying process is determined to be the early drying stage;

[0086] If so, the current drying stage of the drying process is determined to be the later stage of drying.

[0087] When the parameters to be judged include the humidity value of the clothes and the running time of the drying process, it is determined whether the collected humidity value of the clothes and the running time of the drying process have both reached the preset value for the later stage of drying.

[0088] Otherwise, the current drying stage of the drying process is determined to be the early drying stage;

[0089] If so, the current drying stage of the drying process is determined to be the later stage of drying.

[0090] Obtain the drying strategy corresponding to the current drying stage. Since the moisture content of the clothes is at its highest in the early stage of drying, the dehumidification efficiency is very high. Therefore, the drying strategy for the early stage of drying is to control the first throttle valve to throttle and control the second throttle valve to fully open, while simultaneously performing pre-cooling and dehumidification, so as to maximize the handling of moisture load in the early stage of dehumidification.

[0091] Since the moisture content is already low in the later stages of drying, the dehumidification efficiency is relatively low. At this point, temperature has a greater impact on drying efficiency than humidity. Therefore, the corresponding drying strategy for the later stages is to fully open the first throttle valve, throttle the second throttle valve, increase the condenser area, and raise the outlet air temperature. By dividing the drying process into early and late stages and setting corresponding drying strategies, the goal of zoned control of drying efficiency can be achieved.

[0092] The opening degree of the first and second throttle valves is controlled by the obtained drying strategy; wherein,

[0093] When the current drying stage of the drying process is the early drying stage, the first throttle valve is controlled to throttle, and the second throttle valve is controlled to be fully open.

[0094] When the current drying stage of the drying process is the later stage of drying, the first throttle valve is fully opened and the second throttle valve is throttled.

[0095] Collect drying parameter values ​​for the current drying stage during the drying process;

[0096] Determine whether the collected drying parameter values ​​have reached the target values ​​in the drying strategy corresponding to the current drying stage;

[0097] If the collected drying parameter values ​​reach the target values ​​in the drying strategy corresponding to the current drying stage, then proceed to the next drying stage and control the next drying stage until the entire drying process is completed.

[0098] If the collected drying parameter values ​​do not reach the target values ​​in the drying strategy corresponding to the current drying stage, then the first and second throttle valves will continue to be adjusted according to the drying strategy corresponding to the current drying stage.

[0099] If the collected drying parameter values ​​reach the target values ​​in the drying strategy corresponding to the current drying stage, then proceed to the next drying stage and control the next drying stage until the entire drying process is completed.

[0100] In the initial stage of drying, precise control of the moisture content of the garments is necessary to maximize the handling of moisture load. Therefore, the target values ​​in the drying strategy for the initial stage of drying include the target humidity value.

[0101] In the later stages of drying, precise temperature control of the garments is necessary to achieve optimal energy efficiency. Therefore, the target values ​​in the drying strategy for the later stages of drying include target temperature values.

[0102] By combining different target values ​​set in the early and late stages of drying, determining whether the collected drying parameter values ​​have reached the target values ​​in the drying strategy corresponding to the current drying stage includes the following steps:

[0103] When the current drying stage of the drying process is the early drying stage, the humidity value of the clothes is collected;

[0104] Determine whether the collected humidity value of the clothes has reached the target humidity value in the drying strategy corresponding to the early stage of drying;

[0105] Otherwise, increase the opening degree of the first throttle valve to increase the refrigerant flow into the first evaporator to speed up the drying of clothes and reduce the humidity of clothes. At the same time, control the second throttle valve to be fully open and switch to the current drying stage of the drying process when it is the early drying stage to collect the humidity value of clothes.

[0106] Then it enters the later stage of drying, and the control of the later stage of drying is carried out;

[0107] When the current drying stage of the drying process is the later stage of drying, the temperature value of the clothes is collected;

[0108] Determine whether the collected clothing temperature value has reached the target temperature value in the corresponding drying strategy in the later stage of drying;

[0109] Otherwise, control the first throttle valve to be fully open, increase the opening degree of the second throttle valve, increase the refrigerant flow into the second evaporator, increase the condenser area, and increase the outlet air temperature;

[0110] If yes, proceed to the next step.

[0111] To control the humidity of clothes after drying, the target values ​​in the drying strategy for the later stages of drying also include target humidity values. Therefore, determining whether the collected drying parameter values ​​have reached the target values ​​in the drying strategy for the later stages of drying includes the following steps:

[0112] When the current drying stage of the drying process is the later stage of drying, the humidity value of the clothes is collected;

[0113] Determine whether the collected humidity value of the clothes has reached the target humidity value in the corresponding drying strategy in the later stage of drying;

[0114] Otherwise, the temperature value of the clothes is collected, and it is determined whether the collected temperature value of the clothes has reached the target temperature value in the drying strategy corresponding to the later stage of drying; otherwise, the first throttle valve is fully opened, the opening degree of the second throttle valve is increased, the refrigerant flow into the second evaporator is increased, the condenser area is increased, the outlet air temperature is increased, and the process jumps to the later stage of drying when the current drying stage is the later stage of drying, and the humidity value of the clothes is collected; if yes, the first throttle valve is kept fully open, the current opening degree of the second throttle valve is maintained or reduced, the outlet air temperature is maintained, and the process jumps to the later stage of drying when the current drying stage is the later stage of drying, and the humidity value of the clothes is collected.

[0115] If yes, proceed to the next step.

[0116] This invention effectively utilizes the waste heat of the compressor, achieving sensible heat recovery, and its overall efficiency is superior to that of conventional heat pump systems. Different operating modes are selected at different stages of the drying process to achieve optimal energy efficiency.

[0117] Example 4

[0118] An electronic device 200, such as Figure 4 As shown, the system includes, but is not limited to: a memory 201 storing program code; and a processor 202 connected to the memory, which, when the program code is executed by the processor, implements a control method for a semi-open heat pump dryer system. For a detailed description of the method, please refer to the corresponding description in the above method embodiments, which will not be repeated here.

[0119] Example 5

[0120] A computer-readable storage medium, such as Figure 5 As shown, it stores program instructions, which, when executed, implement a control method for a semi-open heat pump dryer system. For a detailed description of the method, please refer to the corresponding description in the above method embodiments; it will not be repeated here.

[0121] Example 6

[0122] A computer program product includes a computer program / instructions that, when executed by a processor, implement a control method for a semi-open heat pump dryer system. A detailed description of the method can be found in the corresponding description in the above method embodiments, and will not be repeated here.

[0123] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0124] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0125] The above are merely embodiments of this specification and are not intended to limit the scope of the one or more embodiments herein. For those skilled in the art, various modifications and variations can be made to the one or more embodiments of this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the one or more embodiments of this specification should be included within the scope of the claims of the one or more embodiments of this specification.

Claims

1. A control method of a semi-open heat pump clothes drying machine system, characterized by, Includes the following steps: Determine whether the current working process of the heat pump dryer is the drying process; If so, turn on the compressor; Otherwise, shut down the compressor; The opening degree of the first throttle valve is adjusted by monitoring the drying parameters; wherein, the first throttle valve is used to adjust the refrigerant flow from the condenser into the first evaporator, and the first evaporator dehumidifies the mixture of gas containing air cooled by the compressor; The method also includes the step of: adjusting the opening degree of the second throttle valve based on the monitored drying parameters; wherein the second throttle valve is used to adjust the refrigerant flow rate from the first evaporator into the second evaporator, the second evaporator pre-cools the air flowing out of the drying chamber, and the first evaporator dehumidifies the mixture of the air cooled by the compressor and the air pre-cooled by the second evaporator. Adjusting the opening degree of the first throttle valve and the second throttle valve based on the monitored drying parameters includes the following steps: Determine the current drying stage of the drying process; Obtain the drying strategy corresponding to the current drying stage; The opening degree of the first and second throttle valves is controlled by the obtained drying strategy; If the collected drying parameter values ​​reach the target values ​​in the drying strategy corresponding to the current drying stage, then proceed to the next drying stage and control the next drying stage until the entire drying process is completed. Determining the current drying stage of the drying process includes the following steps: Obtain the collected humidity values ​​of the clothing and / or the running time of the drying process; Determine whether the collected clothing humidity value and / or the drying process running time have reached the preset value for the later stage of drying; Otherwise, the current drying stage of the drying process is determined to be the early drying stage; If so, the current drying stage of the drying process is determined to be the later stage of drying; The drying strategy corresponding to the early stage of drying is to control the first throttle valve to throttle and control the second throttle valve to be fully open; The drying strategy corresponding to the later stage of drying is to control the first throttle valve to be fully open and control the second throttle valve to throttle. The target values ​​in the drying strategy corresponding to the pre-drying stage include target humidity values; The target values ​​in the drying strategy corresponding to the later stage of drying include target temperature values; The process of controlling the opening degree of the first and second throttle valves using the obtained drying strategy includes the following steps: When the current drying stage of the drying process is the early drying stage, the first throttle valve is controlled to throttle, and the second throttle valve is controlled to be fully open. When the current drying stage of the drying process is the later stage of drying, the first throttle valve is fully opened and the second throttle valve is throttled. The target values ​​in the drying strategy corresponding to the later stage of drying also include target humidity values; If the collected drying parameter values ​​reach the target values ​​in the drying strategy corresponding to the current drying stage, then proceed to the next drying stage and control the next drying stage until the entire drying process is completed. This process also includes the following steps: When the current drying stage of the drying process is the later stage of drying, the humidity value of the clothes is collected; Determine whether the collected humidity value of the clothes has reached the target humidity value in the corresponding drying strategy in the later stage of drying; Otherwise, the temperature value of the clothes is collected, and it is determined whether the collected temperature value of the clothes reaches the target temperature value in the drying strategy corresponding to the later stage of drying; otherwise, the first throttle valve is fully opened, the opening degree of the second throttle valve is increased, and the process jumps to the point where the current drying stage of the drying process is the later stage of drying, and the humidity value of the clothes is collected; if yes, the first throttle valve is kept fully open, the current opening degree of the second throttle valve is kept or decreased, and the process jumps to the point where the current drying stage of the drying process is the later stage of drying, and the humidity value of the clothes is collected. If yes, proceed to the next step.

2. The control method for a semi-open heat pump dryer system according to claim 1, characterized in that, If the collected drying parameter values ​​reach the target values ​​in the drying strategy corresponding to the current drying stage, then proceed to the next drying stage and control the next drying stage until the entire drying process is completed. This includes the following steps: When the current drying stage of the drying process is the early drying stage, the humidity value of the clothes is collected; Determine whether the collected humidity value of the clothes has reached the target humidity value in the drying strategy corresponding to the early stage of drying; Otherwise, increase the opening degree of the first throttle valve, control the second throttle valve to be fully open, and jump to the point where the current drying stage of the drying process is the early drying stage, and collect the humidity value of the clothes; Then it enters the later stage of drying, and the control of the later stage of drying is carried out; When the current drying stage of the drying process is the later stage of drying, the temperature value of the clothes is collected; Determine whether the collected clothing temperature value has reached the target temperature value in the corresponding drying strategy in the later stage of drying; Otherwise, control the first throttle valve to be fully open, increase the opening degree of the second throttle valve, and jump to the point where the current drying stage of the drying process is the later stage of drying, and collect the temperature value of the clothes; If yes, proceed to the next step.

3. A computer-readable storage medium, characterized in that, It stores program instructions that, when executed, implement the method as described in any one of claims 1 to 2.

4. A semi-open heat pump clothes dryer system, characterized in that, include: The system comprises a compressor, a condenser, a first throttling valve, a first evaporator, and a controller. The compressor's air inlet pipe is connected to ambient air, the compressor's air outlet pipe is connected to the air inlet pipe of the first evaporator, the compressor's exhaust pipe is connected to the inlet of the condenser, the condenser's outlet is connected to the inlet of the first evaporator via the first throttling valve, and the first evaporator's outlet is connected to the compressor's suction pipe. The controller is used to execute the control method of a semi-open heat pump dryer system as described in claim 1. It also includes a second throttle valve and a second evaporator. The air outlet pipe of the compressor is connected to the connecting pipe between the first evaporator and the second evaporator. The outlet of the first evaporator is connected to the inlet of the second evaporator via the second throttle valve. The outlet of the second evaporator is connected to the suction pipe of the compressor.

5. A semi-open heat pump clothes dryer, characterized in that: It includes a dryer body and a semi-open heat pump dryer system as described in claim 4 disposed within the dryer body.

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