Drying temperature control method and clothing processing device

Abstract

A drying temperature control method and a clothing processing device. The method comprises: obtaining temperature values at multiple positions in a clothing processing device to obtain temperature parameters; and according to the temperature values at the multiple positions among the temperature parameters, controlling the operation of a temperature control fan (5). The temperature control fan (5) can directly guide an airflow in the external environment to a compressor (1), so that the temperature of the compressor (1) can be directly influenced by the temperature of the external airflow, improving the cooling effect and the cooling efficiency of the temperature control fan (5) with respect to the compressor (1). Furthermore, the operation of the temperature control fan (5) is controlled by the temperature values corresponding to the multiple positions, improving the control precision of the temperature control fan (5) so that the drying temperature can be changed more precisely using the temperature control fan (5), and improving drying quality and satisfying low-temperature drying needs.

Description

Drying temperature control method and clothing processing equipment

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of China on December 22, 2023, with application number 202311793591.8 and invention name “Drying temperature control method and clothing processing equipment”. Technical Field

[0002] The present application relates to the field of drying, and more specifically, to a method for controlling drying temperature and a clothing processing device. Background Art

[0003] When the heat pump washer-dryer is drying, the drying temperature becomes higher and higher due to the accumulation of heat in the drum. Excessively high drying temperature causes damage to fabric fibers and affects the drying quality. In particular, some high-end materials such as silk, wool, etc. are more sensitive to drying temperature and require a lower drying temperature.

[0004] Conventional heat pump drying systems often use a fixed-frequency compressor and auxiliary fans to dissipate heat to indirectly deal with the situation where the drying temperature is too high. However, this method mainly relies on compressor shutdown to achieve cooling, resulting in large fluctuations in drying temperature and affecting drying quality. Summary of the Invention

[0005] The present application provides a drying temperature control method and a clothing processing device to at least solve the technical problem of low drying temperature control accuracy affecting drying quality.

[0006] According to a first aspect of an embodiment of the present application, a drying temperature control method is provided, which is applied to a clothes processing device with a drying function, the clothes processing device comprising a drum and a heat pump module, the heat pump module comprising a compressor, a first heat exchanger and a second heat exchanger, wherein the second heat exchanger is used to serve as an evaporator to cool and dehumidify the drying air flow, and the first heat exchanger is used to serve as a condenser to heat the drying air flow after cooling and dehumidification, and the clothes processing device is provided with a circulating drying flow path formed between the drum and the heat pump module, the first heat exchanger and the second heat exchanger are both arranged on the circulating drying flow path, and the clothes processing device is further provided with a drying fan that provides circulating power for the circulating drying flow path, a cooling channel for cooling the compressor is further provided around the periphery of the compressor, an inlet of the cooling channel is connected to the external environment, and a temperature control fan is further provided in the cooling channel for guiding the air flow in the external environment to the cooling channel, and the method comprises:

[0007] Obtaining operating parameters of the heat pump module, drying airflow parameters of the circulating drying flow path, and environmental parameters of the clothing processing equipment;

[0008] The operating state of the temperature-controlled fan is controlled according to the operating parameters of the heat pump module, the drying airflow parameters and the environmental parameters.

[0009] Optionally, the operating parameters of the heat pump module include the condensing temperature T1 and the exhaust temperature T2, the drying air flow parameters of the circulating drying flow path include the drying temperature T3 in the drum, and the environmental parameters of the clothing processing device include the ambient temperature T 环境 ;

[0010] The operating state of the temperature control fan is controlled according to the operating parameters of the heat pump module, the drying airflow parameters, and the environmental parameters, including:

[0011] The operating state of the temperature-controlled fan is controlled according to the ambient temperature, drying temperature, condensation temperature and exhaust temperature.

[0012] Optionally, controlling the operating state of the temperature-controlled fan according to the ambient temperature, drying temperature, condensing temperature, and exhaust temperature includes:

[0013] When any of the following conditions is met, the temperature control fan is controlled to be continuously turned on:

[0014] The ambient temperature is lower than a preset ambient threshold and the drying temperature is higher than a preset first drying threshold;

[0015] The ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, the exhaust temperature is higher than a preset first exhaust threshold, and the exhaust temperature is higher than a preset second exhaust threshold;

[0016] The ambient temperature is higher than the ambient threshold and the drying temperature is higher than a preset second drying threshold;

[0017] The ambient temperature is higher than the ambient threshold, the drying temperature is lower than the second drying threshold, and at the same time, the exhaust temperature is higher than a preset third exhaust threshold or the condensation temperature is higher than a preset first condensation threshold.

[0018] Optionally, controlling the operating state of the temperature-controlled fan according to the ambient temperature, drying temperature, condensing temperature, and exhaust temperature includes:

[0019] When any of the following conditions is met, the temperature control fan is controlled to be turned on intermittently:

[0020] The ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, the exhaust temperature is higher than the first exhaust threshold, and the exhaust temperature is lower than the second exhaust threshold;

[0021] When the ambient temperature is higher than the ambient threshold and the drying temperature is lower than the second drying threshold, and at the same time, the exhaust temperature is lower than the third exhaust threshold or the condensation temperature is lower than the first condensation threshold, the exhaust temperature is not lower than the preset fourth exhaust threshold or the condensation temperature is not lower than the preset second condensation threshold.

[0022] Optionally, controlling the operating state of the temperature-controlled fan according to the ambient temperature, drying temperature, condensing temperature, and exhaust temperature includes:

[0023] When any of the following conditions is met, the temperature control fan remains in the off state:

[0024] The ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, and the exhaust temperature is lower than the first exhaust threshold;

[0025] When the ambient temperature is higher than the ambient threshold, the drying temperature is lower than the second drying threshold, and at the same time, the exhaust temperature is lower than the third exhaust threshold or the condensation temperature is lower than the first condensation threshold, the exhaust temperature is lower than the preset fourth exhaust threshold or the condensation temperature is lower than the preset second condensation threshold.

[0026] Optionally, the first drying threshold is equal to the second drying threshold, the second exhaust threshold is equal to the third exhaust threshold, the first exhaust threshold is less than the second exhaust threshold, the fourth exhaust threshold is less than the second exhaust threshold, and the first condensation threshold is greater than the second condensation threshold.

[0027] Optionally, the method further includes:

[0028] In response to a temperature acquisition signal, determining whether the ambient temperature can be acquired;

[0029] If the ambient temperature can be obtained, multiple ambient temperatures are obtained within a preset time period and an average value is calculated to obtain the ambient temperature in the temperature parameter;

[0030] If the ambient temperature cannot be obtained, a preset setting value is used as the ambient temperature in the temperature parameter.

[0031] Optionally, the heat pump module includes a accommodating box, in which a accommodating cavity for accommodating the compressor is provided. The accommodating box is designed so that when the compressor is located in the accommodating cavity, a cooling channel is formed between the outer shell of the compressor and the accommodating box. A first through hole communicating with the cooling channel is provided on a first side wall of the accommodating box to serve as the inlet of the cooling channel. A second through hole communicating with the cooling channel is provided on a second side wall of the accommodating box. The temperature control fan is installed on the first side wall and is arranged corresponding to the position of the first through hole.

[0032] Optionally, the depth of the cooling channel corresponds to the height of the compressor.

[0033] Optionally, the first side wall and the second side wall are two opposite side walls of the containing box.

[0034] According to a second aspect of an embodiment of the present application, a clothes processing device is provided, comprising a drum and a heat pump module, the heat pump module comprising a compressor, a first heat exchanger and a second heat exchanger, wherein the second heat exchanger is used to serve as an evaporator to cool and dehumidify the drying air flow, and the first heat exchanger is used to serve as a condenser to heat the drying air flow after cooling and dehumidification, the clothes processing device is provided with a circulating drying flow path formed between the drum and the heat pump module, the first heat exchanger and the second heat exchanger are both arranged on the circulating drying flow path, and the clothes processing device is further provided with a drying fan that provides circulation power for the circulating drying flow path, a cooling channel for cooling the compressor is further provided around the periphery of the compressor, an inlet of the cooling channel is communicated with the external environment, and a temperature-controlled fan is further provided in the cooling channel for guiding the air flow in the external environment to the cooling channel of the compressor;

[0035] The heat pump module includes a storage box, which is provided with a storage cavity for accommodating the compressor. The storage box is designed so that when the compressor is located in the storage cavity, a cooling channel is formed between the outer shell of the compressor and the storage box. A first through hole that communicates with the cooling channel is provided on a first side wall of the storage box to serve as the inlet of the cooling channel. A second through hole that communicates with the cooling channel is provided on a second side wall of the storage box. The temperature control fan is installed on the first side wall and is arranged corresponding to the position of the first through hole.

[0036] Optionally, the clothes processing device adopts the above-mentioned drying temperature control method.

[0037] Optionally, the clothing processing device is a clothes dryer or a heat pump washer-dryer.

[0038] In the embodiments of the present application, the temperature-controlled fan can directly direct airflow from the external environment to the compressor, allowing the temperature of the compressor to be directly affected by the temperature of the external airflow, helping to improve the cooling effect and efficiency of the temperature-controlled fan on the compressor. Furthermore, the operation of the temperature-controlled fan is controlled by temperature values ​​corresponding to multiple positions, which improves the control accuracy of the temperature-controlled fan, helps to use the temperature-controlled fan to more accurately change the drying temperature, improve drying quality, and meet the needs of low-temperature drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG. 1 is an exploded view of a clothes treating apparatus according to an embodiment.

[0040] FIG2 is a schematic diagram of a temperature control fan in a clothes processing device according to an embodiment.

[0041] FIG3 is a schematic diagram of a cooling channel of a clothes processing device according to an embodiment.

[0042] FIG4 is a schematic diagram of the airflow direction of a temperature-controlled fan of a clothes processing device in one embodiment.

[0043] FIG5 is a flow chart of a control method in an embodiment.

[0044] FIG6 is an application flow chart of a control method according to an embodiment.

[0045] Marking instructions: 1. Compressor; 2. Condenser; 3. Evaporator; 4. Storage box; 5. Temperature control fan; 6. Cooling channel; 7. First through hole; 8. Second through hole; 9. First temperature sensing package; 10. Second temperature sensing package DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0048] According to an embodiment of the present application, an embodiment of a method for controlling a drying temperature is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0049] Example 1

[0050] As shown in Figures 1-4, the drying temperature control method is applied to a clothing processing device with a drying function. The clothing processing device includes a cylinder and a heat pump module. The heat pump module includes a compressor 1, a first heat exchanger and a second heat exchanger, wherein the second heat exchanger is used as an evaporator 3 to cool and dehumidify the drying airflow, and the first heat exchanger is used as a condenser 2 to heat, cool and dehumidify the drying airflow. The clothing processing device is provided with a circulating drying flow path formed between the cylinder and the heat pump module. The first heat exchanger and the second heat exchanger are both arranged on the circulating drying flow path and the clothing processing device is also provided with a drying fan that provides circulating power for the circulating drying flow path. A cooling channel 6 for cooling the compressor is also provided around the periphery of the compressor. The inlet of the cooling channel 6 is connected to the external environment. The cooling channel 6 is also provided with a temperature control fan 5 for guiding the airflow in the external environment to the cooling channel 6. The heat pump module includes a accommodating box 4, which has an accommodating cavity for accommodating the compressor 1. The accommodating box 4 is designed so that when the compressor 1 is located in the accommodating cavity, a cooling channel 6 is formed between the outer shell of the compressor 1 and the accommodating box 4. A first through hole 7 that communicates with the cooling channel 6 is provided on the first side wall of the accommodating box 4 to serve as the entrance of the cooling channel 6. A second through hole 8 that communicates with the cooling channel 6 is provided on the second side wall of the accommodating box 4. The temperature control fan 5 is installed on the first side wall and is arranged corresponding to the position of the first through hole 7.

[0051] Specifically, taking a heat pump washer-dryer as an example, the heat pump washer-dryer comprises a variable frequency compressor 1, a condenser 2, a throttle, and an evaporator 3, which are sequentially connected via pipelines. Air in the heat pump washer-dryer circulates between the drum, the drying duct, a container 4, and a circulation fan. The container 4 houses the compressor 1, condenser 2, throttle, and evaporator 3. The air inlet of the temperature-controlled fan 5 connects to the louver on the heat pump washer-dryer's housing, and the air outlet of the temperature-controlled fan 5 connects to the first through-hole 7. When the temperature-controlled fan 5 is turned on, it draws air through the louver and directs cool air from the outside into the turbulent duct through the first through-hole 7. The cool air flows through the turbulent duct and exchanges heat with the compressor 1, reducing the compressor's temperature. The cool air then flows out through the second through-hole 8 and is discharged to the outside of the heat pump washer-dryer. At least a portion of the turbulent duct is located within the cooling channel 6.

[0052] A first temperature sensing package 9 is provided in the middle of the condenser 2 for detecting the condensing temperature T1; a second temperature sensing package 10 is provided on the exhaust pipe of the compressor 1 for detecting the exhaust temperature T2; a third temperature sensing package is provided at the cylinder inlet for detecting the drying temperature T3; an ambient temperature sensing package is provided outside the cylinder for detecting the ambient temperature T4.

[0053] Conventional heat pump clothing processing equipment often uses a fixed-frequency compressor 1 and an auxiliary fan to dissipate heat to indirectly deal with the situation where the drying temperature is too high. However, this method has the following problems:

[0054] The fixed-frequency compressor 1 cannot adjust the output and can only actively shut down to reduce the drying temperature. Frequent start and stop causes the heat pump system to frequently establish a pressure difference, resulting in low drying efficiency and large fluctuations in the drying temperature.

[0055] The auxiliary fan heat dissipation method is adopted. The basis for controlling the start and stop of the auxiliary fan is often the exhaust temperature or the temperature limit of the condenser 2. Its main purpose is to reduce the system load and keep the compressor 1 running normally. However, it cannot effectively control the stability of the drying temperature, affecting the drying performance and drying quality, and it is even more impossible to achieve a lower drying temperature (drying at 37°C).

[0056] When the auxiliary fan blows air to cool the compressor 1, there is no air circulation channel around the compressor 1, the wind blowing on the surface of the compressor 1 is relatively scattered, and most of the wind is not effectively used.

[0057] Based on the fact that the existing technology cannot achieve low-temperature drying (drying at 37°C) and cannot stably and effectively control the drying temperature, this patent proposes a method and device for controlling the low-temperature drying temperature of a heat pump washer-dryer, which can achieve low-temperature drying and maintain a stable drying temperature.

[0058] Example 2

[0059] Based on the example of the clothes processing device shown in the embodiment, as shown in FIG5 , the method provided in this embodiment includes the following steps:

[0060] S101 : Acquire operating parameters of a heat pump module of a clothes processing device, drying airflow parameters of a circulating drying flow path, and environmental parameters of the clothes processing device.

[0061] Preferably, the operating parameters of the heat pump module include the condensing temperature T1 and the exhaust temperature T2, the drying air flow parameters of the circulating drying flow path include the drying temperature T3 in the drum, and the environmental parameters of the clothing processing equipment include the ambient temperature T 环境 It should be noted that the environmental parameters here are the environmental parameters of the clothes processing equipment. Of course, if the cold air in the cooling channel comes from the outside environment, the environmental parameters are the parameters of the outside environment.

[0062] Specifically, the controller can detect the ambient temperature T4 within a second (a is 5 to 30 seconds, preferably 20 seconds) of running the heat pump drying program, and calculate the average value t4 of the ambient temperature T4 within a second; and use t4 as the current ambient temperature, that is, T 环境 =t4;

[0063] If the ambient temperature cannot be obtained, the default is B℃. 环境 =B℃ (B value is 20-30℃, preferably 26℃).

[0064] S102: Control the operating state of the temperature-controlled fan according to the operating parameters of the heat pump module, the drying airflow parameters, and the environmental parameters.

[0065] Specifically, the operating parameters of the heat pump module include the condensing temperature T1 and the exhaust temperature T2, the drying air flow parameters of the circulating drying flow path include the drying temperature T3 in the drum, and the environmental parameters of the clothing processing equipment include the ambient temperature T 环境 .

[0066] In one embodiment, when obtaining the above-mentioned temperature parameters, temperature values ​​detected at multiple locations may be obtained for a certain parameter to ensure the accuracy of the data.

[0067] The temperature-controlled fan can directly direct airflow from the external environment to the compressor, allowing the compressor temperature to be directly affected by the temperature of the external airflow, helping to improve the cooling effect and efficiency of the temperature-controlled fan on the compressor. At the same time, the operation of the temperature-controlled fan is controlled by the temperature values ​​corresponding to multiple positions, which improves the control accuracy of the temperature-controlled fan. This helps to use the temperature-controlled fan to more accurately change the drying temperature, improve drying quality, and meet the needs of low-temperature drying.

[0068] In another embodiment of the present application, the temperature parameters include the ambient temperature outside the clothing processing device and the drying temperature of the air flow entering the drum, as well as the condensing temperature of the condenser 2 and / or the exhaust temperature of the air flow at the exhaust port of the compressor 1.

[0069] In one embodiment, the temperature value of the corresponding position may be collected by installing a temperature sensor or a temperature sensing package, which is not limited in this embodiment.

[0070] Through the above steps, since the ambient temperature, drying temperature, condensing temperature and exhaust temperature can characterize the drying temperature conditions in the clothing processing equipment, the ambient temperature, drying temperature, condensing temperature and exhaust temperature are used to control the operation of the temperature control fan 5 and the operating parameters of the compressor 1, so as to improve the control effect and thus improve the drying quality.

[0071] In another embodiment of the present application, the operating state of the temperature control fan 5 is controlled according to the operating parameters of the heat pump module, the drying airflow parameters, and the environmental parameters, including:

[0072] The operating state of the temperature-controlled fan 5 is controlled according to the ambient temperature, drying temperature, condensation temperature and exhaust temperature.

[0073] Specifically, the operating state of the temperature control fan 5 includes start control, brake control, and operating mode control, such as intermittent operation and the rhythm of intermittent operation. In one embodiment, the operation of the temperature control fan 5 also includes starting and braking the temperature control fan 5. In another embodiment, the temperature control fan 5 operates at different wind speeds or operating frequencies.

[0074] Specifically, when the temperature control meets any of the following conditions according to the ambient temperature, drying temperature, condensing temperature and exhaust temperature, the temperature control fan 5 is controlled to be continuously turned on:

[0075] The ambient temperature is lower than a preset ambient threshold and the drying temperature is higher than a preset first drying threshold;

[0076] The ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, the exhaust temperature is higher than a preset first exhaust threshold, and the exhaust temperature is higher than a preset second exhaust threshold;

[0077] The ambient temperature is higher than the ambient threshold and the drying temperature is higher than a preset second drying threshold;

[0078] The ambient temperature is higher than the ambient threshold, the drying temperature is lower than the second drying threshold, and at the same time, the exhaust temperature is higher than a preset third exhaust threshold or the condensation temperature is higher than a preset first condensation threshold.

[0079] When any of the following conditions is met, the temperature control fan 5 is controlled to be turned on intermittently:

[0080] The ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, the exhaust temperature is higher than the first exhaust threshold, and the exhaust temperature is lower than the second exhaust threshold;

[0081] When the ambient temperature is higher than the ambient threshold and the drying temperature is lower than the second drying threshold, and at the same time, the exhaust temperature is lower than the third exhaust threshold or the condensation temperature is lower than the first condensation threshold, the exhaust temperature is not lower than the preset fourth exhaust threshold or the condensation temperature is not lower than the preset second condensation threshold.

[0082] When any of the following conditions is met, the temperature control fan 5 remains in the off state:

[0083] The ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, and the exhaust temperature is lower than the first exhaust threshold;

[0084] When the ambient temperature is higher than the ambient threshold, the drying temperature is lower than the second drying threshold, and at the same time, the exhaust temperature is lower than the third exhaust threshold or the condensation temperature is lower than the first condensation threshold, the exhaust temperature is lower than the preset fourth exhaust threshold or the condensation temperature is lower than the preset second condensation threshold.

[0085] In one embodiment, the temperature values ​​at the four positions are all used to control the operation of the temperature-controlled fan 5 , so as to improve the control accuracy and thus improve the drying quality.

[0086] For ease of understanding, as shown in FIG6 , the operating state of the temperature-controlled fan 5 is controlled according to the ambient temperature, drying temperature, condensing temperature and exhaust temperature, including:

[0087] When the ambient temperature is lower than the preset ambient threshold and the drying temperature is higher than the preset first drying threshold, the temperature control fan 5 is controlled to be continuously turned on;

[0088] When the ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, the exhaust temperature is higher than the preset first exhaust threshold, and the exhaust temperature is higher than the preset second exhaust threshold, the temperature control fan 5 is controlled to be continuously turned on;

[0089] When the ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, the exhaust temperature is higher than the first exhaust threshold, and the exhaust temperature is lower than the second exhaust threshold, the temperature control fan 5 is controlled to be turned on intermittently;

[0090] When the ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, and the exhaust temperature is lower than the first exhaust threshold, the temperature control fan 5 remains in the off state;

[0091] When the ambient temperature is higher than the ambient threshold and the drying temperature is higher than the preset second drying threshold, the temperature control fan 5 is controlled to be continuously turned on;

[0092] When the ambient temperature is higher than the ambient threshold, the drying temperature is lower than the second drying threshold, and the exhaust temperature is higher than the preset third exhaust threshold or the condensation temperature is higher than the preset first condensation threshold, the temperature control fan 5 is controlled to be continuously turned on;

[0093] When the ambient temperature is higher than the ambient threshold, the drying temperature is lower than the second drying threshold, and at the same time, the exhaust temperature is lower than the third exhaust threshold or the condensation temperature is lower than the first condensation threshold, it is determined whether the exhaust temperature is lower than the preset fourth exhaust threshold or whether the condensation temperature is lower than the preset second condensation threshold. If so, the temperature control fan 5 remains in the closed state; if not, the temperature control fan 5 is controlled to be turned on intermittently.

[0094] For ease of understanding, as shown in Figure 6, the ambient temperature is T 环境, the drying temperature is T3, the exhaust temperature is T2, the condensing temperature is T1, the environmental threshold is D℃, the first drying threshold is (K+1)℃, the second drying threshold is (K+1)℃, the first exhaust threshold is M℃, the second exhaust threshold is N℃, the third exhaust threshold is N℃, the fourth exhaust threshold is (N-5)℃, the first condensation threshold is P℃, and the second condensation threshold is (P-2)℃.

[0095] It should be noted that after the drying process is completed, if the temperature control fan 5 is turned on, the temperature control fan 5 is turned off. Alternatively, when the drying temperature is lower than K°C, the temperature control fan 5 is controlled to be turned off.

[0096] Through the above steps, the temperature control fan 5 is turned on, off or intermittently turned on in combination with the ambient temperature, drying temperature, exhaust temperature and condensing temperature, which helps to improve the control accuracy of the drying temperature and thus improve the drying quality.

[0097] In another embodiment of the present application, the first drying threshold is equal to the second drying threshold, the second exhaust threshold is equal to the third exhaust threshold, the first exhaust threshold is less than the second exhaust threshold, the fourth exhaust threshold is less than the second exhaust threshold, and the first condensation threshold is greater than the second condensation threshold.

[0098] In another embodiment of the present application, the depth of the cooling channel 6 corresponds to the height of the compressor 1; the first side wall and the second side wall are two opposite side walls of the receiving box 4. The depth of the cooling channel 6 is greater than or equal to the maximum height of the compressor 1.

[0099] The embodiment of the present application also provides a clothing processing device, as shown in Figures 1-4, comprising a barrel and a heat pump module, the heat pump module comprising a compressor 1, a first heat exchanger and a second heat exchanger, wherein the second heat exchanger is used as an evaporator 3 to cool and dehumidify the drying airflow, and the first heat exchanger is used as a condenser 2 to heat, cool and dehumidify the drying airflow, the clothing processing device is provided with a circulating drying flow path formed between the barrel and the heat pump module, the first heat exchanger and the second heat exchanger are both arranged on the circulating drying flow path, and the clothing processing device is further provided with a drying fan that provides circulating power for the circulating drying flow path, a cooling channel for cooling the compressor is further provided around the periphery of the compressor, the inlet of the cooling channel is connected to the external environment, and a temperature control fan 5 is further provided in the cooling channel for guiding the airflow in the external environment to the cooling channel of the compressor 1;

[0100] The heat pump module includes a accommodating box 4, which has an accommodating cavity for accommodating the compressor 1. The accommodating box 4 is designed so that when the compressor 1 is located in the accommodating cavity, a cooling channel 6 is formed between the outer shell of the compressor 1 and the accommodating box 4. A first through hole 7 that communicates with the cooling channel 6 is provided on the first side wall of the accommodating box 4 to serve as the entrance of the cooling channel 6. A second through hole 8 that communicates with the cooling channel 6 is provided on the second side wall of the accommodating box 4. The temperature control fan 5 is installed on the first side wall and is arranged corresponding to the position of the first through hole 7.

[0101] Through the above steps, the temperature-controlled fan 5 can directly guide the airflow in the external environment to the compressor 1 , which helps to improve the cooling effect and cooling efficiency of the temperature-controlled fan 5 on the compressor 1 .

[0102] Further referring to the specific drying temperature control process example in FIG6 :

[0103] Step 1: First determine whether the ambient temperature is less than D℃ (D value is 30-40℃, preferably 38℃). If it is, it means the ambient temperature is not high and belongs to medium and low temperature working condition. The process goes to step 2. Otherwise, it is high temperature working condition and go to step 13.

[0104] Step 2: Further determine whether the drying temperature T3 is ≥ (K+1)°C (K ranges from 35°C to 70°C, preferably 37°C and 65°C). If so, it means that the drying temperature has exceeded the limit and needs to be lowered immediately. In this case, go to step 3. Otherwise, go to step 7.

[0105] Step 3: Keep the temperature-controlled fan on to lower the drying temperature.

[0106] Step 4: Determine whether the drying temperature T3 is less than or equal to K°C (i.e., the desired drying temperature). If so, the drying temperature has been effectively controlled, and the process proceeds to Step 5. Otherwise, the drying temperature is still not effectively controlled, and the process proceeds to Step 3, maintaining the temperature control fan on. Step 4 further determines whether T3 is less than or equal to K°C. The purpose is to prevent the drying temperature from being overcorrected, so it is changed to K. Another reason is that if it is K+1, once the temperature sensor fluctuates slightly, it will appear greater than or equal to K+1 for a while and less than K+1 for a while. If the judgment values ​​are too close, it will be detrimental to control. Otherwise, the drying temperature will fluctuate too much, which is not conducive to system control.

[0107] Step 5: Turn off the temperature control fan.

[0108] Step 6: Further determine whether the drying process is completed. If so, go to step 24; otherwise, go to step 2 to continue detecting and determining whether the drying temperature exceeds the limit value.

[0109] Step 7: Although the drying temperature does not exceed the limit value, the drying temperature needs to be pre-controlled, so it is further determined whether the exhaust temperature T2 is ≥M℃ (M is 70-85℃, preferably 80℃). If so, it means that the exhaust temperature is high and the drying temperature has a tendency to increase, so go to step 8. Otherwise, it means that the possibility of further increase in the drying temperature is small, so the process goes to step 12.

[0110] Step 8: Further determine whether the exhaust temperature T2 is ≥ N℃ (N is 85-100℃, preferably 90℃). If so, it means that the exhaust temperature is at a high level and the drying temperature has an obvious upward trend. The temperature control fan needs to participate in the temperature control work immediately. The process goes to step 9. Otherwise, it means that the drying temperature has a general upward trend. The process goes to step 10.

[0111] Step 9: Keep the temperature-controlled fan on to control the drying temperature.

[0112] Step 10: Turn the temperature-controlled fan on for X minutes and off for Y minutes (X is 1 to 5 minutes, preferably 2 minutes, and Y is 1 to 5 minutes, preferably 1 minute), and repeat this cycle to slowly suppress the drying temperature increase trend.

[0113] Step 11: further determine whether the drying process is completed. If so, go to step 24; otherwise, go to step 2 to continue detecting and determining whether the drying temperature exceeds the limit value.

[0114] Step 12: Keep the temperature control fan off and go to step 11.

[0115] Step 13: Determine whether the drum inlet air temperature T3 is ≥ (K+1)°C (K ranges from 35°C to 70°C, preferably 37°C and 65°C). If not, the drying temperature has not exceeded the limit, and the process proceeds to step 18 to further determine the drying temperature trend. If so, the drying temperature has exceeded the limit and needs to be lowered immediately, and the process proceeds to step 14.

[0116] Step 14: Keep the temperature-controlled fan on to lower the drying temperature.

[0117] Step 15: Determine whether the drying temperature T3 is less than or equal to K°C. If so, it means that the drying temperature has been effectively controlled and go to step 16. Otherwise, go to step 14 and keep the temperature control fan on.

[0118] Step 16: Turn off the temperature control fan.

[0119] Step 17: Further determine whether the drying process is completed. If so, go to step 24; otherwise, go to step 13.

[0120] Step 18: Determine whether the exhaust temperature T2 ≥ N ° C or the condensation temperature T1 ≥ P ° C (N is 85 ~ 100 ° C, preferably 90 ° C, P is 65 ~ 75 ° C, preferably 70 ° C). If so, it means that the drying temperature has an obvious upward trend, and the temperature control fan needs to immediately participate in the temperature control work and go to step 19; otherwise, go to step 21.

[0121] Step 19: Keep the temperature-controlled fan on to control the drying temperature.

[0122] Step 20: Further determine whether the drying process is completed. If so, go to step 24; otherwise, go to step 13.

[0123] Step 21: Further determine whether the exhaust temperature T2 < (N-5) ° C or the condensation temperature T1 < (P-2) ° C is satisfied. If so, it indicates that the possibility of further increase in the drying temperature is small, and the process goes to step 22. Otherwise, it indicates that the drying temperature increase trend is general, and the process goes to step 23.

[0124] Step 22: Keep the temperature control fan off.

[0125] Step 23: Turn the temperature control fan on for W minutes and off for Z minutes (W is 1 to 5 minutes, preferably 4 minutes, and Y is 1 to 5 minutes, preferably 1 minute). Repeat this cycle to slowly suppress the trend of increasing drying temperature. The process then goes to step 20.

[0126] Step 24: The process ends.

[0127] Example 3

[0128] In another embodiment of the present application, the laundry processing device adopts the above-mentioned drying temperature control method. In another embodiment of the present application, the laundry processing device is a clothes dryer or a heat pump washer-dryer.

[0129] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0130] Since the existing technology cannot stably and effectively control the drying temperature, this patent proposes a drying temperature control method and device for a heat pump washer-dryer, which can maintain a stable drying temperature and prevent the drying temperature from exceeding the limit. In the embodiment scheme provided in this application, the temperature-controlled fan is regulated according to the operating parameters of the heat pump module, the drying airflow parameters of the circulating drying flow path, and the environmental parameters of the clothing processing equipment. Although the compressor and the temperature-controlled fan are not directly connected on the surface, they are inherently related to each other through the drying temperature as a link. This solution can easily achieve a lower drying temperature (such as the 37°C low-temperature drying promoted by our company). Users can choose whether to perform low-temperature drying or conventional temperature drying according to their own needs.

[0131] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0132] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0133] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected to achieve the purpose of the present embodiment according to actual needs.

[0134] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0135] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program code.

[0136] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for controlling drying temperature, applied to a clothes processing device with a drying function, the clothes processing device comprising a drum and a heat pump module, the heat pump module comprising a compressor (1), a first heat exchanger and a second heat exchanger, wherein the second heat exchanger is used as an evaporator (3) to cool and dehumidify the drying airflow, and the first heat exchanger is used as a condenser (2) to heat, cool and dehumidify the drying airflow, the clothes processing device is provided with a circulating drying flow path formed between the drum and the heat pump module, the first heat exchanger and the second heat exchanger are both arranged on the circulating drying flow path, and the clothes processing device is also provided with a drying fan for providing circulating power for the circulating drying flow path, characterized in that: The compressor is also provided with a cooling channel for cooling the compressor around its periphery, the inlet of the cooling channel is in communication with the external environment, and the cooling channel is also provided with a temperature control fan (5) for directing airflow in the external environment to the cooling channel. The method comprises: Obtaining operating parameters of a heat pump module of a clothes processing device, drying airflow parameters of a circulating drying flow path, and environmental parameters of the clothes processing device; The operating state of the temperature control fan is controlled according to the operating parameters of the heat pump module, the drying airflow parameters and the environmental parameters.

2. The method for controlling the drying temperature according to claim 1, characterized in that: The operating parameters of the heat pump module include the condensation temperature T1 and the exhaust temperature T2, the drying air flow parameters of the circulating drying flow path include the drying temperature T3 in the drum, and the environmental parameters of the clothes processing device include the ambient temperature T 环境 ; The step of controlling the operating state of the temperature control fan (5) according to the operating parameters of the heat pump module, the drying airflow parameters, and the environmental parameters comprises: The operating state of the temperature-controlled fan (5) is controlled according to the ambient temperature, drying temperature, condensation temperature and exhaust temperature.

3. The method for controlling the drying temperature according to claim 2, characterized in that: The operating state of the temperature-controlled fan (5) is controlled according to the ambient temperature, the drying temperature, the condensation temperature and the exhaust temperature, comprising: When any of the following conditions is met, the temperature control fan (5) is controlled to be continuously turned on: The ambient temperature is lower than a preset ambient threshold and the drying temperature is higher than a preset first drying threshold; The ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, the exhaust temperature is higher than a preset first exhaust threshold, and the exhaust temperature is higher than a preset second exhaust threshold; The ambient temperature is higher than the ambient threshold and the drying temperature is higher than a preset second drying threshold; The ambient temperature is higher than the ambient threshold, the drying temperature is lower than the second drying threshold, and at the same time, the exhaust temperature is higher than a preset third exhaust threshold or the condensation temperature is higher than a preset first condensation threshold.

4. The drying control method according to claim 3, characterized in that: The operating state of the temperature-controlled fan (5) is controlled according to the ambient temperature, the drying temperature, the condensation temperature and the exhaust temperature, comprising: When any of the following conditions is met, the temperature control fan (5) is controlled to be turned on intermittently: The ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, the exhaust temperature is higher than the first exhaust threshold, and the exhaust temperature is lower than the second exhaust threshold; When the ambient temperature is higher than the ambient threshold, the drying temperature is lower than the second drying threshold, and at the same time, the exhaust temperature is lower than the third exhaust threshold or the condensation temperature is lower than the first condensation threshold, the exhaust temperature is not lower than the preset fourth exhaust threshold or the condensation temperature is not lower than the preset second condensation threshold.

5. The drying control method according to claim 4, characterized in that: The operating state of the temperature-controlled fan (5) is controlled according to the ambient temperature, the drying temperature, the condensation temperature and the exhaust temperature, comprising: When any of the following conditions is met, the temperature control fan (5) remains in the closed state: The ambient temperature is lower than the ambient threshold, the drying temperature is lower than the first drying threshold, and the exhaust temperature is lower than the first exhaust threshold; When the ambient temperature is higher than the ambient threshold, the drying temperature is lower than the second drying threshold, and at the same time, the exhaust temperature is lower than the third exhaust threshold or the condensation temperature is lower than the first condensation threshold, the exhaust temperature is lower than the preset fourth exhaust threshold or the condensation temperature is lower than the preset second condensation threshold.

6. The method for controlling the drying temperature according to claim 5, characterized in that: The first drying threshold is equal to the second drying threshold, the second exhaust threshold is equal to the third exhaust threshold, the first exhaust threshold is less than the second exhaust threshold, the fourth exhaust threshold is less than the second exhaust threshold, and the first condensation threshold is greater than the second condensation threshold.

7. The method for controlling the drying temperature according to any one of claims 1 to 6, characterized in that: The method further comprises: In response to the temperature acquisition signal, determining whether the ambient temperature can be acquired; If the ambient temperature can be obtained, multiple ambient temperatures are obtained within a preset time period and an average value is calculated to obtain the ambient temperature in the temperature parameter; If the ambient temperature cannot be obtained, a preset setting value is used as the ambient temperature in the temperature parameter.

8. The method for controlling the drying temperature according to any one of claims 1 to 6, characterized in that: The heat pump module comprises a containing box (4), a containing cavity for containing the compressor (1) is provided in the containing box (4), the containing box (4) is designed so that when the compressor (1) is located in the containing cavity, a cooling channel (6) is formed between the outer shell of the compressor (1) and the containing box (4), a first through hole (7) communicating with the cooling channel (6) is provided on a first side wall of the containing box (4) to serve as the inlet of the cooling channel (6), a second through hole (8) communicating with the cooling channel (6) is provided on a second side wall of the containing box (4), and the temperature control fan (5) is mounted on the first side wall and arranged corresponding to the position of the first through hole (7).

9. The method for controlling the drying temperature according to claim 8, characterized in that: The depth of the cooling channel (6) corresponds to the height of the compressor (1).

10. The method for controlling the drying temperature according to claim 8, characterized in that: The first side wall and the second side wall are two opposite side walls of the containing box (4).

11. The method for controlling the drying temperature according to claim 2, characterized in that: The operating state of the temperature-controlled fan (5) is controlled according to the ambient temperature, the drying temperature, the condensation temperature and the exhaust temperature, comprising: When the ambient temperature is lower than the ambient threshold and the drying temperature is lower than K°C, the temperature control fan (5) is controlled to be turned off; Among them, K℃ is the required drying temperature.

12. A clothes processing device, characterized in that: The heat pump module comprises a cylinder and a heat pump module, wherein the heat pump module comprises a compressor (1), a first heat exchanger and a second heat exchanger, wherein the second heat exchanger is used as an evaporator (3) to cool and dehumidify the drying airflow, and the first heat exchanger is used as a condenser (2) to heat, cool and dehumidify the drying airflow, the clothing processing device is provided with a circulating drying flow path formed between the cylinder and the heat pump module, the first heat exchanger and the second heat exchanger are both arranged on the circulating drying flow path, and the clothing processing device is also provided with a drying fan for providing circulating power for the circulating drying flow path, the outer periphery of the compressor is also provided with a cooling channel for cooling the compressor, the inlet of the cooling channel is connected to the external environment, and the cooling channel is also provided with a temperature control fan (5) for guiding the airflow in the external environment to the cooling channel of the compressor (1); The heat pump module comprises a containing box (4), a containing cavity for containing the compressor (1) is provided in the containing box (4), the containing box (4) is designed so that when the compressor (1) is located in the containing cavity, a cooling channel (6) is formed between the outer shell of the compressor (1) and the containing box (4), a first through hole (7) communicating with the cooling channel (6) is provided on a first side wall of the containing box (4) to serve as the inlet of the cooling channel (6), a second through hole (8) communicating with the cooling channel (6) is provided on a second side wall of the containing box (4), and the temperature control fan (5) is mounted on the first side wall and arranged corresponding to the position of the first through hole (7).

13. The clothes treating device according to claim 12, characterized in that: The clothes processing device adopts the drying temperature control method according to any one of claims 1-11.

14. The laundry processing device according to claim 12 or 13, characterized in that: The clothing processing device is a clothes dryer or a heat pump washer-dryer.

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