Drying temperature control method and clothing processing equipment

Abstract

This application relates to the field of drying, specifically to a method for controlling drying temperature and a garment processing device. The method includes acquiring temperature values ​​at multiple locations within the garment processing device to obtain temperature parameters; and controlling the operation of a temperature-controlled fan based on the temperature values ​​at the multiple locations within the temperature parameters. The temperature-controlled fan can directly guide airflow from the external environment to the compressor, allowing the compressor temperature to be directly affected by the temperature of the external airflow, thus improving the cooling effect and efficiency of the temperature-controlled fan on the compressor. Simultaneously, the operation of the temperature-controlled fan is controlled by temperature values ​​corresponding to multiple locations, improving the control precision of the fan and enabling more accurate adjustment of the drying temperature, thereby improving drying quality and meeting the needs of low-temperature drying.

Description

Technical Field

[0001] This application relates to the field of drying, and more specifically, to a method for controlling drying temperature and a garment processing device. Background Technology

[0002] During the drying process of a heat pump washer-dryer, the drying temperature increases due to the accumulation of heat inside the drum. Excessive drying temperature can damage fabric fibers and affect the drying quality. In particular, some high-end materials such as silk and wool are more sensitive to drying temperature and require a lower drying temperature.

[0003] Conventional heat pump drying systems often use fixed-frequency compressors and auxiliary fans to indirectly address excessively high drying temperatures. However, this method mainly relies on the compressor stopping to achieve cooling, resulting in large fluctuations in drying temperature and affecting drying quality. Summary of the Invention

[0004] This application provides a method for controlling drying temperature and a garment processing device to at least solve the technical problem of low accuracy in drying temperature control, which affects drying quality.

[0005] According to a first aspect of the embodiments of this application, a method for controlling drying temperature is provided, applied to a clothing processing device with a drying function. The clothing processing device includes a drum and a heat pump module. The heat pump module includes a compressor, a first heat exchanger, and a second heat exchanger. The second heat exchanger is used as an evaporator to cool and dehumidify the drying airflow. The first heat exchanger is used as a condenser to heat and cool the dehumidified drying airflow. The clothing processing device has a circulating drying flow path formed between the drum and the heat pump module. Both the first and second heat exchangers are disposed on the circulating drying flow path. The clothing processing device also includes a drying fan that provides circulating power to the circulating drying flow path. A cooling channel for cooling the compressor is also arranged around the outer periphery of the compressor. The inlet of the cooling channel is connected to the external environment. A temperature-controlling fan for guiding airflow from the external environment to the cooling channel of the compressor is also provided in the cooling channel. The method includes:

[0006] Obtain the operating parameters of the heat pump module, the drying airflow parameters of the circulating drying path, and the environmental parameters of the clothing processing equipment;

[0007] The operation of the temperature-controlled fan is controlled based on the operating parameters of the heat pump module, the drying airflow parameters, and the environmental parameters.

[0008] Optionally, the operating parameters of the heat pump module include the condensing temperature T1 and the exhaust temperature T2, the drying airflow parameters of the circulating drying path include the drying temperature T3 inside the drum, and the environmental parameters of the clothing processing equipment include the ambient temperature T.环境 ;

[0009] The method of controlling the operation of the temperature-controlled fan based on the heat pump module operating parameters, drying airflow parameters, and environmental parameters includes:

[0010] The operating status of the temperature-controlled fan is controlled according to the ambient temperature, drying temperature, condensation temperature and exhaust temperature.

[0011] Optionally, controlling the operating state of the temperature-controlled fan based on the ambient temperature, drying temperature, condensing temperature, and exhaust temperature includes:

[0012] The temperature control fan will remain on continuously if any of the following conditions are met:

[0013] The ambient temperature is lower than a preset ambient threshold and the drying temperature is higher than a preset first drying threshold.

[0014] 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.

[0015] The ambient temperature is higher than the ambient threshold and the drying temperature is higher than the preset second drying threshold.

[0016] 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 the preset third exhaust threshold or the condensation temperature is higher than the preset first condensation threshold.

[0017] Optionally, controlling the operating state of the temperature-controlled fan based on the ambient temperature, drying temperature, condensing temperature, and exhaust temperature includes:

[0018] The temperature control fan will be turned on intermittently when any of the following conditions are met:

[0019] 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.

[0020] 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 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.

[0021] Optionally, controlling the operating state of the temperature-controlled fan based on the ambient temperature, drying temperature, condensing temperature, and exhaust temperature includes:

[0022] The temperature control fan remains off under any of the following conditions:

[0023] 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.

[0024] 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 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.

[0025] 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.

[0026] Optionally, the method further includes:

[0027] In response to the temperature acquisition signal, determine whether the ambient temperature can be acquired;

[0028] If the ambient temperature can be obtained, multiple ambient temperatures are obtained within a preset time period and the average value is calculated to obtain the ambient temperature in the temperature parameter.

[0029] If the ambient temperature cannot be obtained, the preset setting value will be used as the ambient temperature in the temperature parameters.

[0030] Optionally, the heat pump module includes a housing box with a cavity for accommodating the compressor. The housing box is designed such that when the compressor is located in the cavity, a cooling channel is formed between the compressor housing and the housing box. A first through hole is provided on the first side wall of the housing box to communicate with the cooling channel as the inlet of the cooling channel. A second through hole is provided on the second side wall of the housing box to communicate with the cooling channel. The temperature control fan is installed on the first side wall and is positioned corresponding to the first through hole.

[0031] Optionally, the depth of the cooling channel corresponds to the height of the compressor.

[0032] Optionally, the first sidewall and the second sidewall are two sidewalls opposite to the receiving box.

[0033] According to a second aspect of the embodiments of this application, a clothing processing device is provided, including a drum and a heat pump module. The heat pump module includes a compressor, a first heat exchanger, and a second heat exchanger. The second heat exchanger is used as an evaporator to cool and dehumidify the drying airflow. The first heat exchanger is used as a condenser to heat and cool the dehumidified drying airflow. The clothing 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 disposed on the circulating drying flow path. The clothing processing device is also provided with a drying fan that provides circulating power for the circulating drying flow path. A cooling channel for cooling the compressor is also provided around the outer periphery of the compressor. The inlet of the cooling channel is connected to the external environment. A temperature control fan for guiding the airflow from the external environment to the cooling channel of the compressor is also provided in the cooling channel.

[0034] The heat pump module includes a housing box with a cavity for accommodating the compressor. The housing box is designed such that when the compressor is located in the cavity, a cooling channel is formed between the compressor housing and the housing box. A first through hole is provided on the first side wall of the housing box to flow through the cooling channel as the inlet of the cooling channel. A second through hole is provided on the second side wall of the housing box to communicate with the cooling channel. The temperature control fan is installed on the first side wall and is positioned corresponding to the first through hole.

[0035] Optionally, the garment processing equipment employs the drying temperature control method described above.

[0036] Optionally, the garment processing equipment is a dryer or a heat pump washer-dryer combo.

[0037] In this embodiment, the temperature-controlled fan can directly guide airflow from the external environment to the compressor, allowing the compressor's temperature to be directly affected by the temperature of the external airflow. This helps improve the cooling effect and efficiency of the temperature-controlled fan on the compressor. Simultaneously, the operation of the temperature-controlled fan is controlled by temperature values ​​corresponding to multiple locations, improving its control precision. This allows for more accurate adjustment of the drying temperature, improving drying quality and meeting the requirements of low-temperature drying. Attached Figure Description

[0038] Figure 1 This is an exploded view of a garment processing device in one embodiment.

[0039] Figure 2 This is a schematic diagram of the temperature control fan in a garment processing device in one embodiment.

[0040] Figure 3 This is a schematic diagram of the cooling channel of the clothing processing equipment in one embodiment.

[0041] Figure 4 This is a schematic diagram of the airflow direction driven by the temperature control fan of the clothing processing equipment in one embodiment.

[0042] Figure 5 This is a flowchart of a control method in one embodiment.

[0043] Figure 6 This is an application flowchart of the control method in one embodiment.

[0044] Labeling Explanation: 1. Compressor; 2. Condenser; 3. Evaporator; 4. Container; 5. Temperature Control Fan; 6. Cooling Channel; 7. First Through Hole; 8. Second Through Hole; 9. First Temperature Sensor; 10. Second Temperature Sensor Detailed Implementation

[0045] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] According to an embodiment of this application, an embodiment of a method for controlling drying temperature is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0048] Example 1

[0049] like Figure 1-4As shown, the drying temperature control method is applied to a clothing processing device with a drying function. The clothing processing device includes a drum and a heat pump module. The heat pump module includes a compressor 1, a first heat exchanger, and a second heat exchanger. The second heat exchanger is used as an evaporator 3 to cool and dehumidify the drying airflow. The first heat exchanger is used as a condenser 2 to heat and cool the dehumidified drying airflow. The clothing 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. The clothing processing device is also provided with a drying fan that provides circulating power for the circulating drying flow path. A cooling channel for cooling the compressor is also arranged around the outer periphery of the compressor. The inlet of the cooling channel is connected to the external environment. A temperature-controlled fan 5 is also provided in the cooling channel for guiding the airflow from the external environment to the cooling channel of the compressor 1. The heat pump module includes a housing 4, which has a cavity for accommodating the compressor 1. The housing 4 is designed such that when the compressor 1 is located in the cavity, a cooling channel 6 is formed between the outer shell of the compressor 1 and the housing 4. A first through hole 7 is provided on the first side wall of the housing 4 to flow through the cooling channel 6 as the inlet of the cooling channel 6. A second through hole 8 is provided on the second side wall of the housing 4 to communicate with the cooling channel 6. A temperature-controlled fan 5 is installed on the first side wall and is positioned corresponding to the first through hole 7.

[0050] Specifically, taking a heat pump washer-dryer combo as an example, the inverter compressor 1, condenser 2, expansion valve, and evaporator 3 in the heat pump washer-dryer combo are connected sequentially through pipelines. Air in the heat pump washer-dryer combo circulates between the drum, drying duct, receiving box 4, and circulating fan. The receiving box 4 houses the compressor 1, condenser 2, expansion valve, and evaporator 3. The air inlet of the temperature control fan 5 is connected to the louvers on the outer casing of the heat pump washer-dryer combo, and the air outlet of the temperature control fan 5 is connected to the first through hole 7. When the temperature control fan 5 is turned on, it draws air from the louvers, drawing in outside cold air through the first through hole 7 into the turbulence duct. The cold air flows in the turbulence duct and exchanges heat with the compressor 1, lowering the compressor 1's temperature, before flowing out through the second through hole 8 and being discharged to the outside of the heat pump washer-dryer combo.

[0051] A first temperature sensor 9 is installed in the middle of the condenser 2 to detect the condensing temperature T1; a second temperature sensor 10 is installed on the exhaust pipe of the compressor 1 to detect the exhaust temperature T2; a third temperature sensor is installed at the cylinder inlet to detect the drying temperature T3; and an ambient temperature sensor is installed outside the cylinder to detect the ambient temperature T4.

[0052] Conventional heat pump garment processing equipment often uses a fixed-frequency compressor and an auxiliary fan for cooling to indirectly address excessively high drying temperatures. However, this method has the following problems:

[0053] The fixed-frequency compressor 1 cannot adjust its output and can only actively stop to reduce the drying temperature. Frequent start-stop cycles cause the heat pump system to frequently build up pressure differentials, resulting in low drying efficiency and large fluctuations in drying temperature.

[0054] The auxiliary fan cooling method is used, and the control of the auxiliary fan's start and stop is often based on the exhaust temperature or the temperature limit of condenser 2. Its main purpose is to reduce the system load and keep compressor 1 running normally, but it cannot effectively control the stability of the drying temperature, affecting the drying performance and drying quality, and it cannot achieve a lower drying temperature (37℃ drying).

[0055] When the auxiliary fan blows air to cool the compressor 1, there is no airflow channel around the compressor 1, and the air blown onto the surface of the compressor 1 is relatively dispersed, with most of the air not being effectively utilized.

[0056] Based on the fact that existing technologies cannot achieve low-temperature drying (drying at 37°C) and cannot achieve stable and effective control of 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.

[0057] Example 2

[0058] Based on the clothing processing equipment example shown in the embodiment, such as Figure 5 As shown, the method provided in this embodiment includes the following steps:

[0059] S101. Obtain the operating parameters of the heat pump module of the garment processing equipment, the drying airflow parameters of the circulating drying path, and the environmental parameters of the garment processing equipment.

[0060] Preferably, the operating parameters of the heat pump module include condensing temperature T1 and exhaust temperature T2; the drying airflow parameters of the circulating drying path include drying temperature T3 inside the drum; and the environmental parameters of the clothing processing equipment include ambient temperature T. 环境 It should be noted that the environmental parameters mentioned here refer to the environmental parameters of the garment processing equipment. Of course, if the cold air in the cooling duct comes from the external environment, then the environmental parameters will be the external environmental parameters.

[0061] Specifically, within a second (a ranges from 5 to 30 seconds, preferably 20 seconds) of running the heat pump drying program, the controller detects the ambient temperature T4 and calculates the average value t4 of the ambient temperature T4 within that time period; and uses t4 as the current ambient temperature, i.e., T 环境 =T4;

[0062] If the ambient temperature cannot be obtained, it is set to B℃ by default. In this case, T_ambient = B℃ (B is between 20 and 30℃, preferably 26℃).

[0063] S102. Control the operation of the temperature control fan according to the operating parameters of the heat pump module, the drying airflow parameters, and the environmental parameters.

[0064] Specifically, the operating parameters of the heat pump module include the condensing temperature T1 and the exhaust temperature T2; the drying airflow parameters of the circulating drying path include the drying temperature T3 inside the drum; and the environmental parameters of the clothing processing equipment include the ambient temperature T. 环境 .

[0065] In one embodiment, when the above temperature parameters are obtained, temperature values ​​detected at multiple locations can be obtained for a certain parameter to ensure the accuracy of the data.

[0066] Temperature-controlled fans can directly direct airflow from the external environment to the compressor, allowing the compressor's temperature to be directly affected by the temperature of the external airflow. This helps improve the cooling effect and efficiency of the temperature-controlled fan on the compressor. Simultaneously, the operation of the temperature-controlled fan is controlled by temperature values ​​corresponding to multiple locations, improving its control precision. This allows for more accurate adjustment of the drying temperature, improving drying quality and meeting the needs of low-temperature drying.

[0067] In another embodiment of this application, the temperature parameters include the ambient temperature outside the garment processing equipment and the drying temperature of the airflow entering the drum, as well as the condensing temperature of the condenser 2 and / or the exhaust temperature of the airflow at the exhaust port of the compressor 1.

[0068] In one embodiment, the temperature value at the corresponding location can be collected by installing a temperature sensor or a temperature sensing bulb; however, this embodiment does not limit this method.

[0069] Through the above steps, since the ambient temperature, drying temperature, condensing temperature and exhaust temperature can characterize the drying temperature in the garment processing equipment, the operation parameters of the temperature control fan 5 and the compressor 1 can be controlled using the ambient temperature, drying temperature, condensing temperature and exhaust temperature, which facilitates the improvement of control effect and thus improves drying quality.

[0070] In another embodiment of this application, controlling the operation of the temperature-controlled fan 5 based on the heat pump module operating parameters, drying airflow parameters, and environmental parameters includes:

[0071] The operating status of the temperature-controlled fan 5 is controlled according to the ambient temperature, drying temperature, condensation temperature and exhaust temperature.

[0072] Specifically, the operating status of the temperature-controlled fan 5 includes start-up control, braking control, and operating mode control, such as intermittent operation and the interval of intermittent operation. In one embodiment, the operation of the temperature-controlled fan 5 also includes starting and braking the temperature-controlled fan 5; in another embodiment, the temperature-controlled fan 5 operates at different fan speeds or operating frequencies.

[0073] Specifically, the temperature control fan 5 is kept on continuously when the ambient temperature, drying temperature, condensation temperature, and exhaust temperature are controlled to meet any of the following conditions:

[0074] The ambient temperature is lower than a preset ambient threshold and the drying temperature is higher than a preset first drying threshold.

[0075] 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.

[0076] The ambient temperature is higher than the ambient threshold and the drying temperature is higher than the preset second drying threshold.

[0077] 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 the preset third exhaust threshold or the condensation temperature is higher than the preset first condensation threshold.

[0078] The temperature control fan 5 will be intermittently turned on when any of the following conditions are met:

[0079] 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.

[0080] 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 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.

[0081] The temperature control fan 5 remains off under any of the following conditions:

[0082] 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.

[0083] 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 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.

[0084] In one embodiment, the temperature values ​​at all four locations are used to control the operation of the temperature-controlled fan 5, thereby improving control accuracy and thus improving drying quality.

[0085] For ease of understanding, such as Figure 6 As shown, controlling the operating status of the temperature-controlled fan 5 based on the ambient temperature, drying temperature, condensation temperature, and exhaust temperature includes:

[0086] 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 kept on continuously.

[0087] 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 continue to be 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 first exhaust threshold and the exhaust temperature is lower than the second exhaust threshold, the temperature control fan 5 is controlled to turn on intermittently.

[0089] 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 off.

[0090] 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 kept running.

[0091] 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 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 continue to be turned on.

[0092] 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 yes, the temperature control fan 5 remains off; otherwise, the temperature control fan 5 is controlled to turn on intermittently.

[0093] For ease of understanding, such as Figure 6As shown, the ambient temperature is T_ambient, the drying temperature is T3, the exhaust temperature is T2, the condensation temperature is T1, the ambient 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)℃.

[0094] It should be noted that after the drying process is completed, if the temperature control fan 5 is not running, then the temperature control fan 5 should be turned off. Alternatively, if the drying temperature is below K℃, the temperature control fan 5 should be turned off.

[0095] By taking the above steps and controlling the temperature control fan 5 to turn it on, off, or turn it on intermittently in combination with ambient temperature, drying temperature, exhaust temperature, and condensation temperature, the accuracy of drying temperature control can be improved, thereby improving drying quality.

[0096] In another embodiment of this 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.

[0097] In another embodiment of this application, the depth of the cooling channel 6 corresponds to the height of the compressor 1; the first sidewall and the second sidewall are two opposing sidewalls of the receiving box 4.

[0098] This application also provides a garment processing device, such as... Figure 1-4 As shown, the 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. The second heat exchanger is used as an evaporator 3 to cool and dehumidify the drying airflow. The first heat exchanger is used as a condenser 2 to heat and cool the dehumidified drying airflow. The garment processing equipment is provided with a circulating drying flow path formed between the cylinder and the heat pump module. The first and second heat exchangers are both located on the circulating drying flow path. The garment processing equipment is also provided with a drying fan that provides circulating power for the circulating drying flow path. A cooling channel for cooling the compressor is also provided around the outer periphery of the compressor. The inlet of the cooling channel is connected to the external environment. A temperature control fan 5 is also provided in the cooling channel to guide the airflow from the external environment to the cooling channel of the compressor 1.

[0099] The heat pump module includes a housing 4, which has a cavity for accommodating the compressor 1. The housing 4 is designed such that when the compressor 1 is located in the cavity, a cooling channel 6 is formed between the outer shell of the compressor 1 and the housing 4. A first through hole 7 is provided on the first side wall of the housing 4 to flow through the cooling channel 6 as the inlet of the cooling channel 6. A second through hole 8 is provided on the second side wall of the housing 4 to communicate with the cooling channel 6. A temperature-controlled fan 5 is installed on the first side wall and is positioned corresponding to the first through hole 7.

[0100] Through the above steps, the temperature control fan 5 can directly guide the airflow from the external environment to the compressor 1, which helps to improve the cooling effect and cooling efficiency of the temperature control fan 5 on the compressor 1.

[0101] Further integration Figure 6 Example of a specific drying temperature control process:

[0102] Step 1: First, determine if the ambient temperature is lower than D℃ (D is between 30 and 40℃, preferably 38℃). If so, the ambient temperature is not high, indicating a medium-low temperature operating condition; proceed to Step 2. Otherwise, it is a high-temperature operating condition; proceed to Step 13.

[0103] Step 2: Further determine whether the drying temperature T3 is ≥ (K+1)℃ (K is 35~70℃, preferably 37℃ and 65℃). If so, it means that the drying temperature has exceeded the limit and needs to be reduced immediately. Proceed to Step 3. Otherwise, proceed to Step 7.

[0104] Step 3: Keep the temperature-controlled fan running to lower the drying temperature.

[0105] Step 4: Determine if the drying temperature T3 is less than or equal to K℃ (the required 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 returns to Step 3, maintaining the temperature control fan on. Step 4 further determines if T3 is less than or equal to K℃ to prevent the drying temperature from being over-corrected. Another reason is that if it were K+1, slight fluctuations in the temperature sensor would cause the temperature to fluctuate between greater than or equal to K+1 and then less than K+1, resulting in values ​​that are too close and difficult to control. Otherwise, excessive temperature fluctuations would hinder system control.

[0106] Step 5: Turn off the temperature control fan.

[0107] Step 6: Further determine whether the drying process is complete. If so, proceed to step 24; otherwise, proceed to step 2 and continue to check whether the drying temperature exceeds the limit value.

[0108] Step 7: Although the drying temperature has not exceeded the limit, it needs to be pre-controlled. Therefore, it is necessary to further determine whether the exhaust temperature T2 is ≥ M℃ (M is 70-85℃, preferably 80℃). If so, it indicates that the exhaust temperature is high and the drying temperature is trending upward. Proceed to Step 8. Otherwise, it indicates that the possibility of the drying temperature rising further is small. Proceed to Step 12.

[0109] Step 8: Further determine whether the exhaust temperature T2 is ≥ N℃ (N is 85~100℃, preferably 90℃). If it is, it means that the exhaust temperature is high and the drying temperature is rising significantly. The temperature control fan needs to participate in the temperature control work immediately. Proceed to step 9. Otherwise, it means that the drying temperature is rising only moderately. Proceed to step 10.

[0110] Step 9: Continuously turn on the temperature control fan to control the drying temperature.

[0111] Step 10: Turn the temperature control fan ON for X minutes and OFF for Y minutes (X ranges from 1 to 5 minutes, preferably 2 minutes; Y ranges from 1 to 5 minutes, preferably 1 minute). Repeat this cycle to gradually suppress the rising trend of the drying temperature.

[0112] Step 11: Further determine whether the drying process is complete. If so, proceed to step 24; otherwise, proceed to step 2 and continue to check whether the drying temperature exceeds the limit value.

[0113] Step 12: Keep the temperature control fan off, then proceed to step 11.

[0114] Step 13: Determine if the drum inlet air temperature T3 is ≥ (K+1)℃ (K ranges from 35 to 70℃, preferably 37℃ and 65℃). If not, it means the drying temperature has not exceeded the limit. Proceed to Step 18 to further determine the subsequent trend of the drying temperature. If yes, it means the drying temperature has exceeded the limit and needs to be reduced immediately. Proceed to Step 14.

[0115] Step 14: Keep the temperature control fan running to lower the drying temperature.

[0116] Step 15: Determine whether the drying temperature T3 is less than or equal to K℃. If it is, it means that the drying temperature has been effectively controlled and proceed to step 16. Otherwise, proceed to step 14 and keep the temperature control fan on.

[0117] Step 16: Turn off the temperature control fan.

[0118] Step 17: Further determine whether the drying process is complete. If so, proceed to step 24; otherwise, proceed to step 13.

[0119] Step 18: Determine whether the exhaust temperature T2 ≥ N℃ or the condensation temperature T1 ≥ P℃ (N is 85~100℃, preferably 90℃, P is 65~75℃, preferably 70℃). If so, it means that the drying temperature is rising significantly and the temperature control fan needs to immediately participate in the temperature control work. Proceed to step 19. Otherwise, proceed to step 21.

[0120] Step 19: Continuously turn on the temperature control fan to control the drying temperature.

[0121] Step 20: Further determine whether the drying process is complete. If so, proceed to step 24; otherwise, proceed to step 13.

[0122] Step 21: Further determine whether the exhaust temperature T2 < (N-5)℃ or the condensation temperature T1 < (P-2)℃ is met. If so, it means that the possibility of further increase in drying temperature is small, and the process proceeds to step 22. Otherwise, it means that the trend of increase in drying temperature is generally normal, and the process proceeds to step 23.

[0123] Step 22: Keep the temperature control fan off.

[0124] Step 23: Turn the temperature control fan ON for W minutes and OFF for Z minutes (W value is 1~5min, preferably 4min; Y value is 1~5min, preferably 1min). Repeat this cycle to gradually suppress the rising trend of drying temperature. Then proceed to step 20.

[0125] Step 24: Process ends.

[0126] Example 3

[0127] In another embodiment of this application, the garment processing equipment employs the aforementioned method for controlling the drying temperature. In yet another embodiment of this application, the garment processing equipment is a dryer or a heat pump washer-dryer combo.

[0128] 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.

[0129] Since existing technologies cannot achieve stable and effective control of drying temperature, this patent proposes a method and device for controlling the drying temperature of a heat pump washer-dryer combo, which can maintain a stable drying temperature and prevent the drying temperature from exceeding the limit. In the embodiment provided in this application, the temperature control fan is adjusted based on the operating parameters of the heat pump module, the drying airflow parameters of the circulating drying path, and the environmental parameters of the garment processing equipment. Although the compressor and the temperature control fan do not appear to be directly connected, they are internally linked through the drying temperature. This solution can easily achieve lower drying temperatures (such as the 37℃ low-temperature drying advertised by our company). Users can choose whether to perform low-temperature drying or conventional temperature drying according to their own needs.

[0130] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0131] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0132] The units described as separate components may or may not be physically separate. The 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 can be selected to achieve the purpose of this embodiment according to actual needs.

[0133] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0134] If the integrated unit is implemented as 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 this application, in essence, 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. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0135] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for controlling drying temperature, applied to a garment processing device with drying function, the garment processing device including a drum and a heat pump module, the heat pump module including 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, the first heat exchanger is used as a condenser (2) to heat and cool the dehumidified drying airflow, the garment 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 garment processing device is also provided with a drying fan to provide circulating power for the circulating drying flow path, characterized in that: The compressor is also surrounded by a cooling channel for cooling the compressor. The inlet of the cooling channel is connected to the external environment. The cooling channel is also equipped with a temperature-controlled fan (5) for guiding airflow from the external environment to the cooling channel of the compressor (1). The method includes: Obtain the operating parameters of the heat pump module of the garment processing equipment, the drying airflow parameters of the circulating drying path, and the environmental parameters of the garment processing equipment. The operation 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. The operating parameters of the heat pump module include condensation temperature and exhaust temperature; the drying airflow parameters of the circulating drying path include the drying temperature inside the drum; and the environmental parameters of the clothing processing equipment include ambient temperature. The method of controlling the operation of the temperature-controlled fan (5) based on the heat pump module operating parameters, drying airflow parameters, and environmental parameters includes: The operating status of the temperature control fan (5) is controlled according to the ambient temperature, drying temperature, condensation temperature and exhaust temperature.

2. The method for controlling the drying temperature according to claim 1, characterized in that, The method of controlling the operating status of the temperature-controlled fan (5) based on the ambient temperature, drying temperature, condensing temperature, and exhaust temperature includes: The temperature control fan (5) will be kept on continuously when any of the following conditions are met: 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 the preset first exhaust threshold, and the exhaust temperature is higher than the preset second exhaust threshold. The ambient temperature is higher than the ambient threshold and the drying temperature is higher than the 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 the preset third exhaust threshold or the condensation temperature is higher than the preset first condensation threshold.

3. The method for controlling the drying temperature according to claim 2, characterized in that, The method of controlling the operating status of the temperature-controlled fan (5) based on the ambient temperature, drying temperature, condensing temperature, and exhaust temperature includes: The temperature control fan (5) is intermittently turned on when any of the following conditions are met: 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 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.

4. The method for controlling the drying temperature according to claim 3, characterized in that, The method of controlling the operating status of the temperature-controlled fan (5) based on the ambient temperature, drying temperature, condensing temperature, and exhaust temperature includes: The temperature control fan (5) remains off when any of the following conditions are met: 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 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.

5. The method for controlling the drying temperature according to claim 4, 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.

6. The method for controlling the drying temperature according to any one of claims 1-5, characterized in that, The method further includes: In response to the temperature acquisition signal, determine 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 the average value is calculated to obtain the ambient temperature; If the ambient temperature cannot be obtained, the preset setting value will be used as the ambient temperature.

7. The method for controlling the drying temperature according to any one of claims 1-5, characterized in that, The heat pump module includes a housing (4), which has a cavity for accommodating the compressor (1). The housing (4) is designed such that when the compressor (1) is located in the cavity, a cooling channel (6) is formed between the outer shell of the compressor (1) and the housing (4). A first through hole (7) is provided on the first side wall of the housing (4) to communicate with the cooling channel (6) as the inlet of the cooling channel (6). A second through hole (8) is provided on the second side wall of the housing (4) to communicate with the cooling channel (6). The temperature control fan (5) is installed on the first side wall and is positioned corresponding to the first through hole (7).

8. The method for controlling the drying temperature according to claim 7, characterized in that, The depth of the cooling channel (6) corresponds to the height of the compressor (1).

9. The method for controlling the drying temperature according to claim 7, characterized in that, The first sidewall and the second sidewall are the two sidewalls opposite to the receiving box (4).

10. A garment processing device, characterized in that, The 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. The second heat exchanger is used as an evaporator (3) to cool and dehumidify the drying airflow. The first heat exchanger is used as a condenser (2) to heat and cool the dehumidified drying airflow. The garment processing equipment 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 set on the circulating drying flow path. The garment processing equipment is also provided with a drying fan that provides circulating power for the circulating drying flow path. The compressor is also surrounded by a cooling channel for cooling the compressor. The inlet of the cooling channel is connected to the external environment. 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 includes a housing (4), which has a cavity for accommodating the compressor (1). The housing (4) is designed such that when the compressor (1) is located in the cavity, a cooling channel (6) is formed between the outer shell of the compressor (1) and the housing (4). A first through hole (7) is provided on the first side wall of the housing (4) to communicate with the cooling channel (6) as the inlet of the cooling channel (6). A second through hole (8) is provided on the second side wall of the housing (4) to communicate with the cooling channel (6). The temperature control fan (5) is installed on the first side wall and is positioned corresponding to the first through hole (7). A controller, the controller being configured at least to control the operation of the temperature-controlled fan based on heat pump module operating parameters, drying airflow parameters, and environmental parameters; The operating parameters of the heat pump module include condensation temperature and exhaust temperature; the drying airflow parameters of the circulating drying path include the drying temperature inside the drum; and the environmental parameters of the clothing processing equipment include ambient temperature.

11. The garment processing equipment according to claim 10, characterized in that, The garment processing equipment adopts the drying temperature control method according to any one of claims 1-9.

12. The garment processing equipment according to claim 11, characterized in that, The clothing processing equipment is a dryer or a heat pump washer-dryer combo.

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