A temperature control method and temperature control device for a heat pump dryer

Abstract

This application proposes a temperature control method and device for a heat pump dryer. The proposed solution compares the temperature inside the dryer's air duct with a preset temperature threshold to control the on / off operation of the auxiliary heating wire, heat pump, and cooling fan. This improves drying efficiency while reducing energy consumption. Furthermore, it prevents clothing from being damaged by excessively high temperatures during the drying process.

Description

Technical Field

[0001] This application relates to the field of clothes dryer technology, and in particular to a temperature control method and temperature control device for a heat pump clothes dryer. Background Technology

[0002] Currently, dryers mainly include direct-vent dryers, condenser dryers, and heat pump dryers. Compared with the first two types of dryers, heat pump dryers have the characteristics of energy saving and environmental protection, with energy saving reaching 40% to 50%. Therefore, the market prospects for heat pump dryers are very large.

[0003] The working principle of existing heat pump dryers is as follows: the evaporator of the heat pump system absorbs heat from the surrounding environment and dissipates heat at the condenser. A fan drives air to circulate through the evaporator, condenser, and drum. The air is cooled at the evaporator, releasing moisture and becoming dry, cold air. This dry, cold air then flows through the condenser and is heated, becoming dry, hot air. This dry, hot air enters the drying drum, carrying away moisture from the clothes and becoming humid, hot air. This humid, hot air then flows through the evaporator, is cooled, and releases moisture, forming a circulating airflow path, thus reusing the heat.

[0004] However, existing heat pump dryers lack an external heat source, resulting in a slow temperature rise during the initial operation of the heat pump system. For example, in an 8 kg dryer system, it takes 30 minutes to reach the 60-degree drying temperature. This necessitates improvement in the drying efficiency of heat pump dryers. Summary of the Invention

[0005] This application provides a temperature control method and device for a heat pump dryer, which can improve drying efficiency while reducing energy consumption. Furthermore, the temperature control method proposed in this application can also prevent clothing from being damaged due to excessively high temperatures during the drying process.

[0006] In a first aspect, this application provides a temperature control method for a heat pump dryer. The control method includes: turning off the auxiliary heating wire when both the auxiliary heating wire and the heat pump are turned on and the temperature inside the dryer's air duct, as measured by a temperature sensor, is higher than or equal to a first temperature threshold; and turning on the auxiliary heating wire when the auxiliary heating wire is turned off, the heat pump is turned on, and the temperature inside the dryer's air duct, as measured by the temperature sensor, is lower than a second temperature threshold, wherein the second temperature threshold is lower than the first temperature threshold.

[0007] The temperature control method for the heat pump dryer provided in this application first turns on both the auxiliary heating wire and the heat pump. When the temperature sensor detects that the temperature inside the dryer's air duct is higher than or equal to a first temperature threshold, the auxiliary heating wire is turned off. Since the auxiliary heating wire and the heat pump work simultaneously, the drying efficiency can be improved. Furthermore, the auxiliary heating wire is turned off as long as the temperature is higher than or equal to the first temperature threshold, thereby saving energy to a certain extent.

[0008] In addition, when the auxiliary heating wire is off and the heat pump is on alone, the heating capacity of the heat pump may be lower than the cooling capacity of the heat pump dryer, resulting in a very low temperature inside the dryer's air duct. Since the heat pump is working alone at this time and its heating capacity is relatively slow, the drying efficiency may be reduced. Therefore, this application sets a second temperature threshold. As long as the temperature sensor detects that the temperature inside the dryer's air duct is lower than the second temperature threshold, the auxiliary heating wire is turned on to further improve the drying efficiency.

[0009] In conjunction with the first aspect, in a first possible implementation, the heat pump dryer further includes a cooling fan. Accordingly, the method further includes: when the auxiliary heating wire is turned off, the heat pump is turned on, the cooling fan is turned off, and the temperature inside the dryer's air duct collected by the temperature sensor is higher than a third temperature threshold, the cooling fan is turned on, wherein the third temperature threshold is greater than or equal to the first temperature threshold.

[0010] The temperature control method for the heat pump dryer provided in this application may result in the heat pump dryer becoming too hot when the auxiliary heating wire is turned off and the heat pump is turned on alone. By turning on the cooling fan, the problem can be prevented from being damaged by excessively high temperatures during the drying process.

[0011] In conjunction with the second possible implementation, in the third possible implementation, the method further includes: when the auxiliary heating wire is turned off, the heat pump is turned on, the cooling fan is turned on, and the temperature in the dryer duct collected by the temperature sensor is lower than or equal to the first temperature threshold, the cooling fan is turned off.

[0012] The temperature control method for the heat pump dryer provided in this application, when the auxiliary heating wire is off, the heat pump is turned on independently, and the cooling fan is turned on, if the temperature inside the dryer's air duct collected by the temperature sensor is lower than or equal to a first temperature threshold, that is, when the cooling fan is turned on, the temperature inside the dryer's air duct is low, the drying efficiency is improved by turning off the cooling fan.

[0013] In conjunction with the second possible implementation, in the fourth possible implementation, the method further includes: when the auxiliary heating wire is turned off, the heat pump is turned on, the cooling fan is turned on, and the temperature in the dryer duct collected by the temperature sensor is higher than the fourth temperature threshold, the heat pump is turned off, wherein the fourth temperature threshold is greater than or equal to the third temperature threshold.

[0014] The temperature control method for the heat pump dryer provided in this application, when the auxiliary heating wire is off, the heat pump is turned on independently, and the cooling fan is on, if the temperature inside the dryer's air duct collected by the temperature sensor is higher than the fourth temperature threshold, that is, even if the cooling fan is turned on, the temperature inside the dryer's air duct is still relatively high, the heat pump is turned off to avoid the clothes being damaged due to excessive temperature during the drying process.

[0015] In conjunction with the fourth possible implementation, in the fifth possible implementation, the method further includes: both the auxiliary heating wire and the heat pump are turned off, the cooling fan is turned on, and when the temperature in the dryer duct collected by the temperature sensor is lower than the first temperature threshold and higher than the second temperature threshold, the heat pump is turned on and the cooling fan is turned off.

[0016] The temperature control method for the heat pump dryer provided in this application, after the auxiliary heating wire and the heat pump are both turned off and the cooling fan is turned on, when the temperature inside the dryer's air duct collected by the temperature sensor is lower than the first temperature threshold and higher than the second temperature threshold, that is, the temperature has not yet dropped to a particularly low level, the heat pump is turned on to reheat. Compared with turning on the auxiliary heating wire and the heat pump at the same time, this method can save energy.

[0017] In conjunction with the fourth possible implementation, the sixth possible implementation further includes: turning off both the auxiliary heating wire and the heat pump, turning on the cooling fan, and turning on the auxiliary heating wire and the heat pump and turning off the cooling fan when the temperature inside the dryer duct collected by the temperature sensor is lower than the second temperature threshold.

[0018] The temperature control method for the heat pump dryer provided in this application involves turning off both the auxiliary heating wire and the heat pump, turning on the cooling fan, and when the temperature inside the dryer's air duct, as collected by the temperature sensor, is lower than a second temperature threshold (meaning both the auxiliary heating wire and the heat pump are off, and the cooling fan is on), the temperature drops to a very low level. At this point, the auxiliary heating wire and the heat pump are turned on simultaneously, thereby improving the drying efficiency.

[0019] Secondly, this application provides a temperature control device for a heat pump dryer, the heat pump dryer including an auxiliary heating wire, a heat pump, a temperature sensor, and a dryer duct. The device includes: a temperature sensing module for the temperature sensor to collect the temperature within the dryer duct; and a control module for turning off the auxiliary heating wire when both the auxiliary heating wire and the heat pump are on and the temperature collected by the temperature sensor within the dryer duct is higher than or equal to a first temperature threshold; the control module is further configured to turn on the auxiliary heating wire when the auxiliary heating wire is off, the heat pump is on, and the temperature collected by the temperature sensor within the dryer duct is lower than a second temperature threshold, where the second temperature threshold is lower than the first temperature threshold.

[0020] In conjunction with the second aspect, in the first possible implementation, the heat pump dryer further includes a cooling fan. Accordingly, the control module is also configured to: turn on the cooling fan when the auxiliary heating wire is off, the heat pump is on, the cooling fan is off, and the temperature in the dryer's air duct collected by the temperature sensor is higher than a third temperature threshold, wherein the third temperature threshold is greater than or equal to the first temperature threshold.

[0021] In conjunction with the second possible implementation, in the third possible implementation, the control module is further configured to: turn off the cooling fan when the auxiliary heating wire is off, the heat pump is on, the cooling fan is on, and the temperature in the dryer duct collected by the temperature sensor is lower than or equal to the first temperature threshold.

[0022] In conjunction with the second possible implementation, in the fourth possible implementation, the control module is further configured to: shut down the heat pump when the auxiliary heating wire is off, the heat pump is on, the cooling fan is on, and the temperature in the dryer duct collected by the temperature sensor is higher than the fourth temperature threshold, wherein the fourth temperature threshold is greater than or equal to the third temperature threshold.

[0023] In conjunction with the fourth possible implementation, in the fifth possible implementation, the control module is further configured to: turn on the heat pump and turn off the cooling fan when the auxiliary heating wire and the heat pump are both off, the cooling fan is on, and the temperature in the dryer duct collected by the temperature sensor is lower than the first temperature threshold and higher than the second temperature threshold.

[0024] In conjunction with the fourth possible implementation, in the sixth possible implementation, the control module is further configured to: turn on the auxiliary heating wire and the heat pump and turn off the cooling fan when the auxiliary heating wire and the heat pump are both off, the cooling fan is on, and the temperature in the dryer duct collected by the temperature sensor is lower than the second temperature threshold.

[0025] Thirdly, this application provides a chip including at least one processor and a communication interface, the communication interface and the at least one processor being interconnected via a line, the at least one processor being configured to run a computer program or instructions to perform the temperature control method for a heat pump dryer as described in the first aspect or any of its possible implementations.

[0026] Fourthly, this application provides a computer-readable medium storing program code for execution by a device, the program code including a temperature control method for performing a heat pump dryer as described in the first aspect or any of its possible implementations.

[0027] Fifthly, this application provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the temperature control method for a heat pump dryer as described in the first aspect or any of its possible implementations.

[0028] In a sixth aspect, this application provides a heat pump dryer, which includes the temperature control device of the second aspect or the chip of the third aspect. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of temperature control for a heat pump dryer according to one embodiment of this application;

[0030] Figure 2 A schematic flowchart of a temperature control method for a heat pump dryer provided in another embodiment of this application;

[0031] Figure 3 A schematic flowchart illustrating a temperature control method for a heat pump dryer provided in one embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the structure of a temperature control device provided in another embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the structure of a heat pump dryer provided in one embodiment of this application. Detailed Implementation

[0034] For ease of understanding, the relevant terms used in this application will be explained first.

[0035] 1. Heat pump dryer

[0036] A clothes dryer is a household appliance that uses electric heating to instantly evaporate and dry the moisture in laundry. Currently, clothes dryers mainly include direct-vent dryers, condenser dryers, and heat pump dryers. Compared to the first two types of dryers, heat pump dryers are energy-saving and environmentally friendly, achieving energy savings of 40% to 50%.

[0037] A heat pump dryer is a heat-lifting device. Its working principle is as follows: circulating air is heated by the condenser to produce dry hot air; the hot air is blown into the drying drum, and the dry hot air passes through the wet clothes, taking away the moisture and becoming humid air; the humid air enters the evaporator, is cooled and releases moisture, becoming dry cold air; the dry cold air enters the condenser, is heated back into dry hot air, and enters the drying drum again; this cycle continues to dry the clothes.

[0038] The control method for a heat pump dryer provided in this application embodiment is applicable to the following heat pump dryers: the heat pump dryer may be equipped with an auxiliary heating device, a heat pump, a temperature sensor, and a dryer air duct, and the auxiliary heating device may work in conjunction with the heat pump. Optionally, the auxiliary heating device may be disposed within the air duct of the heat pump dryer. Optionally, the auxiliary heating device may be, for example, an auxiliary heating wire.

[0039] With the popularization of heat pump dryers and the development of control technology, more intelligent heat pump dryers have gradually emerged. How to improve the drying efficiency of heat pump dryers while reducing energy consumption has always been one of the focuses of consumers' attention.

[0040] In one existing temperature control method for a heat pump dryer, an auxiliary heating device is installed in the air duct of the heat pump dryer. In the initial stage of operation, the auxiliary heating device and the heat pump are controlled to provide heat for the drying process simultaneously. When the temperature in the air duct of the heat pump dryer reaches the set value, the auxiliary heating device is turned off, and only the heat pump is used for drying, thereby improving drying efficiency while reducing energy consumption.

[0041] However, the existing temperature control method of heat pump dryers does not turn the auxiliary heating device on again after it is turned off. As a result, the temperature inside the air duct of the heat pump dryer may drop rapidly after the auxiliary heating device is turned off. When it drops to a very low temperature, the drying efficiency will decrease because the heat pump heating capacity is relatively slow.

[0042] In view of this, this application provides a temperature control device for a heat pump dryer. The method proposed in this application controls the on / off operation of the auxiliary heating wire, heat pump, and cooling fan by comparing the temperature inside the air duct of the heat pump dryer with a preset temperature threshold. This improves drying efficiency while reducing energy consumption. Furthermore, it prevents clothing from being damaged by excessively high temperatures during the drying process.

[0043] A flowchart illustrating the temperature control method for a heat pump dryer provided in one embodiment of this application is shown below. Figure 1 As described. Figure 1 As shown, the method in this embodiment may include steps S101, S102, S103, S104, S105, S106, and S107. This control method can be executed by a heat pump dryer that includes an auxiliary heating wire, a heat pump, a temperature sensor, and a dryer duct.

[0044] S101, Turn on the auxiliary heating wire and heat pump.

[0045] For example, when a heat pump dryer starts working, the control device can simultaneously turn on the auxiliary heating wire and the heat pump to shorten the heating time of the dryer's air duct and improve the working efficiency of the heat pump dryer.

[0046] It should be understood that for heat pump dryers without auxiliary heating wires, the system temperature rises slowly at the beginning of heat pump operation. For example, in an 8 kg dryer system, it takes 30 minutes to reach the drying temperature of 60 degrees Celsius. However, with the addition of auxiliary heating wires, the auxiliary heating device can work together with the heat pump to provide heat for the drying process even in lower ambient temperatures, thereby improving drying efficiency and shortening drying time.

[0047] S102, The temperature sensor collects the temperature inside the dryer's air duct.

[0048] After the heat pump dryer starts working, the temperature sensor can periodically collect the temperature inside the dryer's air duct. This collection period can be preset. Alternatively, the temperature inside the dryer's air duct can be collected in real time; this embodiment of the application does not limit this.

[0049] S103. Determine whether the temperature inside the dryer's air duct is higher than or equal to the first temperature threshold. If so, execute S104; otherwise, execute S101.

[0050] For example, the control device of a heat pump dryer can compare the temperature collected by the temperature sensor with a preset first temperature threshold. If the temperature collected by the temperature sensor is higher than or equal to the preset first temperature threshold, then step S104 is executed.

[0051] It can be understood that if the temperature collected by the temperature sensor is higher than or equal to the preset first temperature threshold, then step S104 is executed. It can also be understood that if the temperature inside the dryer duct is lower than the first temperature threshold, then the auxiliary heating wire and the heat pump are kept on simultaneously.

[0052] S104, Turn off the auxiliary heating wire.

[0053] In this embodiment, when the temperature inside the dryer's air duct, as detected by the temperature sensor, is higher than or equal to a first temperature threshold, the auxiliary heating wire is turned off, allowing the heat pump to operate independently, thereby reducing energy consumption. For example, if the first temperature threshold is 50 degrees Celsius, and the temperature inside the dryer's air duct, detected by the temperature sensor, is higher than or equal to 50 degrees Celsius, the auxiliary heating wire is turned off.

[0054] Optionally, the aforementioned heat pump dryer with auxiliary heating device may specifically include a condenser, evaporator, compressor, throttling device and drum. In order to improve the working efficiency of the heat pump, it may also include commonly used heat pump system devices such as gas-liquid separator, liquid receiver and oil separator.

[0055] S105, The temperature sensor collects the temperature inside the dryer's air duct.

[0056] In this embodiment, after the auxiliary heating wire is turned off, the temperature inside the dryer duct is collected when only the heat pump is on, so as to obtain the temperature inside the dryer duct when only the heat pump is on.

[0057] S106. Determine whether the temperature inside the dryer's air duct is lower than the second temperature threshold. If yes, proceed to step S107; otherwise, proceed to step S108, where the second temperature threshold is less than the first temperature threshold.

[0058] For example, the control device of a heat pump dryer can compare the temperature collected by the temperature sensor with a preset second temperature threshold. If the temperature collected by the temperature sensor is higher than or equal to the preset second temperature threshold, then step S107 is executed.

[0059] S107, Turn on the auxiliary heating wire.

[0060] In this embodiment, after the auxiliary heating wire is turned off, only the heat pump provides heat. However, since the heat pump heats up slowly, the cooling rate may exceed the heating rate. This means that the temperature inside the dryer's air duct may be low after the auxiliary heating wire is turned off. Therefore, this application sets a second temperature threshold, or lower limit, for the temperature inside the dryer's air duct. When the temperature inside the dryer's air duct detected by the temperature sensor is lower than the second temperature threshold, the auxiliary heating wire and the heat pump continue to operate simultaneously, thereby further improving drying efficiency.

[0061] As an example, the second temperature threshold is set to 40 degrees. If the temperature inside the dryer duct collected by the temperature sensor is lower than 40 degrees, the auxiliary heating wire is turned on again.

[0062] The temperature control method for the heat pump dryer provided in this application first turns on both the auxiliary heating wire and the heat pump to provide heat for the drying process, thereby improving drying efficiency. Furthermore, the auxiliary heating wire is turned off as long as the temperature is above or equal to a first temperature threshold, which also saves energy to a certain extent.

[0063] In addition, when the auxiliary heating wire is off and the heat pump is on alone, the heating capacity of the heat pump may be lower than the heat dissipation of the heat pump dryer, resulting in a very low temperature inside the dryer's air duct. Since the heat pump is working alone at this time and its heating capacity is relatively slow, it may reduce the drying efficiency. Therefore, this application sets a second temperature threshold. As long as the temperature sensor detects that the temperature inside the dryer's air duct is lower than the second temperature threshold, the auxiliary heating wire is turned on to further improve the drying efficiency.

[0064] Optionally, when the temperature inside the dryer's air duct is not lower than a second temperature threshold, the heat pump dryer further includes a cooling fan. Correspondingly, when the auxiliary heating wire is turned off and the heat pump is turned on, the method further includes:

[0065] S108. Determine whether the temperature inside the dryer's air duct collected by the temperature sensor is higher than the third temperature threshold. If yes, proceed to S109; otherwise, continue to keep the auxiliary heating wire off and the heat pump on. The third temperature threshold is greater than or equal to the first temperature threshold.

[0066] For example, the control device of a heat pump dryer can compare the temperature collected by the temperature sensor with a preset third temperature threshold. If the temperature collected by the temperature sensor is higher than the preset third temperature threshold, then step S109 is executed.

[0067] In this embodiment, if the temperature inside the dryer's air duct is not higher than the third temperature threshold and not lower than the second temperature threshold, it indicates that the temperature inside the dryer's air duct is not very high. In this case, the auxiliary heating wire remains off and the heat pump remains on in step S104. If the temperature inside the dryer's air duct is lower than the second temperature threshold while not higher than the third temperature threshold, it indicates that the temperature inside the dryer's air duct is low when the heat pump is turned on alone. In this case, the auxiliary heating wire can be turned on, i.e., step S107.

[0068] It should be noted that the third temperature threshold can be set according to the material or other characteristics of the clothing, and this embodiment does not limit it.

[0069] S109. Turn on the cooling fan.

[0070] In this embodiment, when the auxiliary heating wire is turned off and the heat pump is turned on, if the temperature inside the dryer duct continues to rise, the clothes may be damaged due to excessive temperature. Therefore, this embodiment sets a third temperature threshold. As long as the temperature inside the dryer duct is higher than the third temperature threshold, the cooling fan is turned on to control the temperature inside the dryer duct within a reasonable range, so as to avoid the clothes being damaged due to excessive temperature during the drying process.

[0071] As an example, suppose the third temperature threshold is 60 degrees. If the temperature inside the dryer duct collected by the temperature sensor is higher than 60 degrees, the cooling fan will be turned on.

[0072] The temperature control method for the heat pump dryer provided in this application may result in the heat pump dryer becoming too hot when the auxiliary heating wire is turned off and the heat pump is turned on alone. By turning on the cooling fan, the problem can be prevented from being damaged by excessively high temperatures during the drying process.

[0073] As an optional embodiment, Figure 2 This is a schematic flowchart illustrating a temperature control method for a heat pump dryer according to another embodiment of this application. Figure 2 As shown, after the auxiliary heating wire is turned off, the heat pump is turned on, and the cooling fan is turned on, i.e. after step S109, the method further includes:

[0074] S110, a temperature sensor collects the temperature inside the dryer's air duct.

[0075] S111. Determine whether the temperature inside the dryer's air duct is lower than or equal to the first temperature threshold. If yes, proceed to S112; otherwise, proceed to step S113.

[0076] For example, the control device of a heat pump dryer can compare the temperature collected by the temperature sensor with a preset first temperature threshold. If the temperature collected by the temperature sensor is lower than or equal to the preset first temperature threshold, then step S112 is executed.

[0077] S112. Turn off the cooling fan.

[0078] In this embodiment, when the auxiliary heating wire is off, the heat pump is on, and the cooling fan is on, the cooling fan can affect the temperature inside the dryer's air duct. If the temperature inside the dryer's air duct drops rapidly after the cooling fan is turned on, to the point that the temperature collected by the temperature sensor is lower than or equal to the first temperature threshold, the cooling fan is then turned off to reduce its impact on the temperature inside the dryer's air duct, thereby controlling the temperature inside the dryer's air duct within a reasonable range and improving drying efficiency.

[0079] S113. Determine whether the temperature inside the dryer's air duct is higher than the fourth temperature threshold. If so, proceed to step S114. Otherwise, continue to keep the auxiliary heating wire off, the heat pump on, and the cooling fan on. The fourth temperature threshold is greater than or equal to the third temperature threshold.

[0080] It should be understood that if the temperature inside the dryer's air duct is neither higher than the fourth temperature threshold nor lower than the first temperature threshold, it means that the temperature inside the dryer's air duct is neither very high nor very low. Therefore, the auxiliary heating element should remain off, the heat pump should remain on, and the cooling fan should remain on. If the temperature inside the dryer's air duct is higher than the fourth temperature threshold, it means that the temperature inside the dryer's air duct is very high, and step S114 should be executed.

[0081] S114, Turn off the heat pump.

[0082] In this embodiment, when the auxiliary heating wire is off, the heat pump is on, and the cooling fan is on, the cooling fan can affect the temperature inside the dryer's air duct. If the temperature inside the dryer's air duct continues to rise after the cooling fan is turned on, the clothes may be damaged due to excessively high temperatures inside the air duct. Therefore, this embodiment sets a fourth temperature threshold. If the temperature inside the dryer's air duct exceeds the fourth temperature threshold, the heat pump is turned off to lower the temperature inside the dryer's air duct, thereby controlling the temperature inside the dryer's air duct within a reasonable range to avoid damage to the clothes during the drying process due to excessively high temperatures.

[0083] As an example, suppose the fourth temperature threshold is 70 degrees. If the temperature sensor detects that the temperature inside the dryer's duct is higher than 70 degrees, the heat pump will be turned off.

[0084] The temperature control method for the heat pump dryer provided in this application, when the auxiliary heating wire is off, the heat pump is turned on independently, and the cooling fan is on, if the temperature inside the dryer's air duct collected by the temperature sensor is lower than or equal to the first temperature threshold, that is, the temperature inside the dryer's air duct is low after the cooling fan is turned on, the drying efficiency is improved by turning off the cooling fan. If the temperature inside the dryer's air duct is higher than the fourth temperature threshold, it indicates that the temperature inside the dryer's air duct is very high, and the temperature inside the dryer's air duct is controlled within a reasonable range by turning off the heat pump, thus avoiding damage to the clothes during the drying process due to excessively high temperatures.

[0085] As an optional embodiment, Figure 3 This is a schematic flowchart illustrating a temperature control method for a heat pump dryer according to one embodiment of this application. Figure 3 As shown, after the auxiliary heating wire is turned off, the cooling fan is turned on, and the heat pump is turned off, i.e. after step S114, the method further includes:

[0086] S115, The temperature sensor collects the temperature inside the dryer's air duct.

[0087] S116. Determine whether the temperature inside the dryer's air duct is lower than the first temperature threshold and higher than the second temperature threshold. If so, proceed to step S117; otherwise, proceed to step S118.

[0088] S117. Turn on the heat pump and turn off the cooling fan.

[0089] In this embodiment, when the auxiliary heating wire is off, the heat pump is off, and the cooling fan is on, the temperature inside the dryer's duct will continuously decrease because only the cooling fan is running. If the temperature inside the dryer's duct, as measured by the temperature sensor, is below a first temperature threshold but above a second temperature threshold, the heat pump can be turned on and the cooling fan turned off to raise the temperature inside the dryer's duct and improve drying efficiency. Furthermore, this avoids the need to reheat when the temperature drops too low, reducing energy consumption.

[0090] S118. Determine whether the temperature inside the dryer's air duct is lower than the second temperature threshold. If yes, execute S119; otherwise, execute S114.

[0091] It should be understood that if the temperature inside the dryer's air duct is not lower than the second temperature threshold, it means that the temperature inside the dryer's air duct is not particularly low at this time. Therefore, the auxiliary heating wire should be kept off, the cooling fan should be on, and the heat pump should be off, i.e., S114 should be executed.

[0092] S119. Turn on the auxiliary heating wire and heat pump, and turn off the cooling fan.

[0093] In this embodiment, when both the auxiliary heating wire and the heat pump are off and the cooling fan is on, the temperature inside the dryer's duct will continuously decrease because only the cooling fan is running. If the temperature inside the duct hasn't dropped significantly, the heat pump can be turned on to reheat the duct, saving energy compared to simultaneously turning on both the auxiliary heating wire and the heat pump. If the temperature inside the duct falls below the second temperature threshold, indicating a very low temperature, the cooling fan is turned off, and the auxiliary heating wire and heat pump are turned on again to raise the temperature inside the duct quickly, thereby improving drying efficiency.

[0094] It should be noted that any of the above embodiments can be implemented alone, or at least two of the above embodiments can be combined in any way, and there is no limitation thereto.

[0095] Figure 4 This is a schematic diagram of the structure of a temperature control device provided in another embodiment of this application. Figure 4 The apparatus shown can be used to perform the temperature control method described in any of the foregoing embodiments. For example... Figure 4 As shown, the device 400 in this embodiment includes: a temperature measurement module 401 and a control module 402.

[0096] Among them, the temperature measurement module 401 is used by the temperature sensor to collect the temperature inside the air duct of the dryer.

[0097] Control module 402: is used to turn off the auxiliary heating wire when both the auxiliary heating wire and the heat pump are turned on and the temperature in the dryer duct collected by the temperature sensor is higher than or equal to a first temperature threshold; the control module 402 is also used to turn on the auxiliary heating wire when the auxiliary heating wire is turned off, the heat pump is turned on and the temperature in the dryer duct collected by the temperature sensor is lower than a second temperature threshold, wherein the second temperature threshold is lower than the first temperature threshold.

[0098] As an example, the temperature measurement module 401 can be used to collect the temperature inside the dryer's air duct in the temperature control method described above for a heat pump dryer. For example, the temperature measurement module 401 can be used to execute S101 or S115.

[0099] As an example, control module 402 can be used to perform the determination of the temperature inside the dryer duct, which can be used in the temperature control method of the heat pump dryer described above, or to control the auxiliary heating wire, heat pump, and cooling fan. For example, control module 402 is used to execute S104 or S112.

[0100] In one possible implementation, the heat pump dryer further includes a cooling fan. Accordingly, the control module 402 is also configured to: turn on the cooling fan when the auxiliary heating wire is off, the heat pump is on, the cooling fan is off, and the temperature in the dryer duct collected by the temperature sensor is higher than a third temperature threshold, wherein the third temperature threshold is greater than or equal to the first temperature threshold.

[0101] In one possible implementation, the control module 402 is further configured to: turn off the cooling fan when the auxiliary heating wire is off, the heat pump is on, the cooling fan is on, and the temperature in the dryer duct collected by the temperature sensor is lower than or equal to the second temperature threshold.

[0102] In one possible implementation, the control module 402 is further configured to: shut down the heat pump when the auxiliary heating wire is off, the heat pump is on, the cooling fan is on, and the temperature inside the dryer duct collected by the temperature sensor is higher than a fourth temperature threshold, wherein the fourth temperature threshold is greater than or equal to a third temperature threshold.

[0103] In one possible implementation, the control module 402 is further configured to: turn on the heat pump and turn off the cooling fan when the auxiliary heating wire and heat pump are both off, the cooling fan is on, and the temperature in the dryer duct collected by the temperature sensor is lower than a first temperature threshold and higher than a second temperature threshold.

[0104] In one possible implementation, the control module 402 is further configured to: turn on the auxiliary heating wire and heat pump and turn off the cooling fan when the auxiliary heating wire and heat pump are both off, the cooling fan is on, and the temperature in the dryer duct collected by the temperature sensor is lower than the second temperature threshold.

[0105] Figure 5 This is a schematic diagram of the structure of a heat pump dryer provided in one embodiment of this application. Figure 5 The apparatus shown can be used to perform the method described in any of the foregoing embodiments.

[0106] like Figure 5 As shown, the device 500 of this embodiment includes: a memory 501, a processor 502, a communication interface 503, and a bus 504. The memory 501, processor 502, and communication interface 503 are interconnected via the bus 504.

[0107] The memory 501 can be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 501 can store programs, and when the program stored in the memory 501 is executed by the processor 502, the processor 502 uses it to execute... Figures 1 to 3 The steps of the method shown.

[0108] The processor 502 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, used to execute relevant programs to implement the methods in the various embodiments of this application.

[0109] The processor 502 can also be an integrated circuit chip with signal processing capabilities. In implementation, each step of the method in the various embodiments of this application can be accomplished by the integrated logic circuitry in the hardware of the processor 502 or by instructions in software form.

[0110] The processor 502 described above can also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0111] The steps of the method disclosed in the embodiments of this application can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 501. The processor 502 reads the information in memory 501 and, in conjunction with its hardware, completes the functions required by the units included in the apparatus of this application. For example, it can execute various steps / functions of any of the embodiments shown in the figures above.

[0112] The communication interface 503 can use, but is not limited to, transceivers to enable communication between the device 500 and other devices or communication networks.

[0113] Bus 504 may include a pathway for transmitting information between various components of device 500 (e.g., memory 501, processor 502, communication interface 503).

[0114] It should be understood that the device 500 shown in the embodiments of this application may be an electronic device, or it may be a chip configured in an electronic device.

[0115] It should be understood that the processor in the embodiments of this application can be a central processing unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0116] It should also be understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous linked DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0117] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.

[0118] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0119] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0120] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0121] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0122] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0123] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only 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 coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0124] 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 network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0125] In addition, 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.

[0126] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they 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 a portion 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 described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

[0127] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A temperature control method for a heat pump dryer, characterized in that, The heat pump dryer includes an auxiliary heating wire, a heat pump, a temperature sensor, and a dryer air duct; the method includes: The auxiliary heating wire and the heat pump are turned on simultaneously. When the temperature in the dryer duct collected by the temperature sensor is higher than or equal to the first temperature threshold, the auxiliary heating wire is turned off. When the auxiliary heating wire is turned off, the heat pump is turned on, and the temperature inside the dryer duct collected by the temperature sensor is lower than the second temperature threshold, the auxiliary heating wire is turned on, and the second temperature threshold is less than the first temperature threshold. The heat pump dryer also includes a cooling fan, and correspondingly, the method further includes: When the auxiliary heating wire is turned off, the heat pump is turned on, the cooling fan is turned off, and the temperature in the dryer duct collected by the temperature sensor is higher than the third temperature threshold, the cooling fan is turned on, and the third temperature threshold is greater than or equal to the first temperature threshold.

2. The method according to claim 1, characterized in that, The method further includes: When the auxiliary heating wire is turned off, the heat pump is turned on, the cooling fan is turned on, and the temperature in the dryer duct collected by the temperature sensor is lower than or equal to the first temperature threshold, the cooling fan is turned off.

3. The method according to claim 1, characterized in that, The method further includes: When the auxiliary heating wire is turned off, the heat pump is turned on, the cooling fan is turned on, and the temperature in the dryer duct collected by the temperature sensor is higher than the fourth temperature threshold, the heat pump is turned off, and the fourth temperature threshold is greater than or equal to the third temperature threshold.

4. The method according to claim 3, characterized in that, The method further includes: When the auxiliary heating wire and the heat pump are both turned off, the cooling fan is turned on, and the temperature in the dryer's air duct collected by the temperature sensor is lower than the first temperature threshold and higher than the second temperature threshold, the heat pump is turned on and the cooling fan is turned off.

5. The method according to claim 3, characterized in that, The method further includes: When the auxiliary heating wire and the heat pump are both turned off, the cooling fan is turned on, and the temperature in the dryer duct collected by the temperature sensor is lower than the second temperature threshold, the auxiliary heating wire and the heat pump are turned on, and the cooling fan is turned off.

6. A temperature control device for a heat pump dryer, characterized in that, The heat pump dryer includes an auxiliary heating wire, a heat pump, a temperature sensor, and a dryer air duct. The device includes: The temperature measurement module is used by the temperature sensor to collect the temperature inside the air duct of the dryer; The control module is configured to turn off the auxiliary heating wire when the auxiliary heating wire and the heat pump are turned on simultaneously, and turn on the auxiliary heating wire when the temperature in the dryer duct collected by the temperature sensor is higher than or equal to a first temperature threshold; and turn on the auxiliary heating wire when the auxiliary heating wire is turned off, the heat pump is turned on, and the temperature in the dryer duct collected by the temperature sensor is lower than a second temperature threshold, wherein the second temperature threshold is less than the first temperature threshold. The heat pump dryer also includes a cooling fan, and correspondingly, the control module is also used for: When the auxiliary heating wire is off, the heat pump is on, the cooling fan is off, and the temperature inside the dryer's air duct collected by the temperature sensor is higher than a third temperature threshold, the cooling fan is turned on, where the third temperature threshold is greater than or equal to the first temperature threshold.

7. A chip, characterized in that, It includes at least one processor and a communication interface, the communication interface and the at least one processor being interconnected via a line, the at least one processor being used to run a computer program or instructions to perform the method as described in any one of claims 1 to 5.

8. A computer-readable medium, characterized in that, The computer-readable medium stores program code for computer execution, the program code including instructions for performing the method as described in any one of claims 1 to 5.

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