Fabric processing equipment and drying control method for fabric processing equipment

Abstract

This application provides a fabric processing device and a drying control method for the fabric processing device, belonging to the technical field of fabric processing equipment. The heat pump system in this application can rapidly raise the temperature to the required level after startup. Simultaneously, it redirects the hot, humid fabric processing drum's return air through a bypass section, reducing the dehumidification load through the evaporator. Utilizing the recovered heat, the heat pump system can provide more heat in the early stages of drying, thereby increasing the dew point temperature of the return air from the fabric processing drum, increasing the dehumidification capacity of the evaporator, significantly shortening the drying time, improving drying efficiency, and ensuring rapid drying of clothing. Furthermore, it adaptively adjusts the cooling fan speed according to compressor temperature changes, effectively reducing the compressor temperature in the later stages of compressor operation while utilizing this excess heat to increase the superheat of the heat pump system. This allows the heat pump system to reduce power consumption, improve system operating efficiency, and extend the equipment's service life.

Description

Technical Field

[0001] This application relates to the field of fabric processing equipment technology, and more specifically, to a fabric processing device and a drying control method for the fabric processing device. Background Technology

[0002] With the development of society and economy and the improvement of people's living standards, people's demand for high-quality clothes drying is increasing day by day.

[0003] In modern households, clothes dryers have become an indispensable home appliance. However, most household dryers on the market currently use either electric drying or heat pump drying. These two methods have significant shortcomings in terms of energy efficiency and performance, and cannot fully meet users' needs for efficient, energy-saving, and high-quality drying. Summary of the Invention

[0004] This application provides a fabric processing device and a drying control method for the fabric processing device. By setting up a bypass ventilation duct that can be switched on and off with the drying air duct and the ventilated heat exchanger, and adaptively adjusting the size of the bypass ventilation duct inlet according to the temperature value of the return air inlet of the drying air duct, the heat pump system can recover and utilize part of the heat from the return air of the fabric processing cylinder and auxiliary heating equipment in the early stage of drying. This is equivalent to adding a preheating device before the condenser, which can quickly raise the temperature to the required level after startup, greatly shortening the drying time and improving the drying efficiency. At the same time, by bypassing part of the hot return air from the high-temperature and high-humidity fabric processing cylinder, the amount of dehumidification through the evaporator is reduced. Utilizing the recovered heat, the heat pump system can provide more heat in the early stage of drying, thereby increasing the dew point temperature of the return air of the fabric processing cylinder, increasing the dehumidification capacity of the evaporator, and ensuring that the clothes dry quickly. In this embodiment, by controlling the return air bypass flow and optimizing the heat recovery mechanism of the heat pump system, the evaporator load can be reduced in the early and middle stages of drying, increasing the dehumidification effect of the return air. This indirectly results in a lower relative humidity in the air supplied to the fabric treatment drum, accelerating the rapid evaporation of moisture from the fabric inside the drum and improving the dehumidification effect. Specifically:

[0005] The first aspect of this application provides a fabric treatment apparatus, comprising:

[0006] Fabric treatment tube;

[0007] The drying air duct has a return air inlet and an air outlet. The drying air duct forms a circulating drying air path with the fabric treatment cylinder through the return air inlet and the air outlet.

[0008] The heat pump system includes an evaporator and a condenser located on the drying air duct path, and a ventilated heat exchanger between the evaporator and the condenser. The evaporator is located near the return air inlet of the drying air duct, and the condenser is located near the air outlet of the drying air duct.

[0009] The side ventilation duct has an air inlet connected to the air inlet side of the evaporator and an air outlet connected to the ventilation heat exchanger. It is equipped with auxiliary heating equipment that is controlled to start when the side ventilation duct is opened.

[0010] The bypass ventilation duct is equipped with an adjustment mechanism at its air inlet for adjusting the opening of the bypass ventilation duct air inlet. The adjustment mechanism is used to control the opening of the bypass ventilation duct air inlet according to the return air temperature at the return air inlet of the drying air duct.

[0011] In the above technical solution, the opening size of the bypass ventilation duct inlet is negatively correlated with the temperature at the drying air duct return air outlet.

[0012] In the above technical solution, if the temperature at the return air inlet of the drying air duct is greater than or equal to the first preset return air temperature value, the regulating mechanism controls the air inlet of the bypass air duct to close.

[0013] If the temperature at the return air inlet of the drying air duct is lower than the first preset return air temperature value, the regulating mechanism adjusts the opening of the air inlet of the bypass air duct according to the degree to which the temperature at the return air inlet of the drying air duct is lower than the first preset return air temperature value.

[0014] In the above technical solution, the heat pump system also includes a compressor that is connected to the evaporator and condenser through a refrigerant pipeline, and a cooling fan for dissipating heat from the compressor.

[0015] The fabric processing equipment also includes a heat dissipation duct, which is equipped with an on / off mechanism for opening or closing the heat dissipation duct.

[0016] When the cooling duct is open, the running cooling fan can send the compressor's cooling air to the ventilated heat exchanger to mix the compressor's cooling air with the heat exchange air after heat exchange in the evaporator.

[0017] In the above technical solution, if the temperature of the compressor is lower than the first preset compressor temperature value, the on / off mechanism can control the cooling air duct to close.

[0018] If the compressor temperature is higher than the first preset compressor temperature value, the on / off mechanism can control the opening of the heat dissipation air duct.

[0019] In the above technical solution, when the heat dissipation duct is turned on, the operating speed of the heat dissipation fan is positively correlated with the temperature of the compressor.

[0020] In the above technical solution, the regulating mechanism includes a regulating valve for adjusting the opening of the bypass ventilation duct inlet.

[0021] The on / off mechanism includes an openable / closeable valve for controlling the opening or closing of the heat dissipation duct.

[0022] In the above technical solution, the fabric processing equipment also includes:

[0023] Temperature sensor: The temperature sensor is used to obtain the temperature values ​​of the return air inlet and air inlet of the drying air duct when the fabric processing equipment is running the drying program.

[0024] The controller is used to terminate the drying program when the return air temperature and the outlet air temperature in the drying duct are the same or the difference between them is less than a preset difference.

[0025] In the above technical solution, the fabric treatment equipment is a heat pump dryer.

[0026] A second aspect of this application provides a drying control method for a fabric processing device, applied to the fabric processing device provided in the first aspect of this application. The drying control method includes:

[0027] During the drying process, the temperature value at the return air inlet of the drying air duct is obtained, and the opening of the bypass air duct is adjusted according to the temperature value at the return air inlet of the drying air duct.

[0028] In the above technical solution, adjusting the opening of the bypass ventilation duct according to the temperature value at the return air inlet of the drying air duct includes:

[0029] If the temperature at the return air inlet of the drying air duct is greater than or equal to the first preset return air temperature value, the air inlet of the bypass air duct will be closed.

[0030] If the temperature at the return air inlet of the drying air duct is lower than the first preset return air temperature value, the opening of the air inlet of the bypass air duct shall be adjusted according to the degree to which the temperature at the return air inlet of the drying air duct is lower than the first preset return air temperature value.

[0031] The opening size of the air inlet of the bypass ventilation duct is negatively correlated with the temperature at the return air inlet of the drying air duct.

[0032] In the above technical solution, the control method also includes:

[0033] The compressor temperature value is obtained, and the opening and closing of the heat dissipation duct is controlled based on the compressor temperature value.

[0034] In the above technical solution, controlling the opening and closing of the heat dissipation duct according to the compressor's temperature value includes:

[0035] If the compressor temperature is lower than the first preset compressor temperature value, the cooling air duct will be closed.

[0036] If the compressor temperature is higher than the first preset compressor temperature value, the cooling air duct will be opened.

[0037] In the above technical solution, the drying control method further includes:

[0038] When the cooling duct is open, adjust the operating speed of the cooling fan according to the temperature value of the compressor;

[0039] The operating speed of the cooling fan is positively correlated with the temperature of the compressor.

[0040] In the above technical solution, during the drying process, the temperature values ​​at the return air inlet and the air inlet of the drying air duct are obtained;

[0041] If the return air temperature and the outlet air temperature of the drying duct are the same or the difference between them is less than the preset difference, the drying program will end.

[0042] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0043] In this embodiment, a bypass duct that can be switched on and off with the drying duct and the ventilated heat exchanger is set up. The size of the bypass duct inlet is adaptively adjusted according to the temperature of the return air inlet of the drying duct. This allows the heat pump system to recover and utilize part of the heat from the return air of the fabric processing drum and auxiliary heating equipment in the early stage of drying. This is equivalent to adding a preheating device before the condenser, which can quickly raise the temperature to the required level after startup, greatly shortening the drying time and improving the drying efficiency. At the same time, by bypassing part of the hot return air from the high-temperature and high-humidity fabric processing drum, the amount of dehumidification through the evaporator is reduced. Utilizing the recovered heat, the heat pump system can provide more heat in the early stage of drying, thereby increasing the dew point temperature of the return air from the fabric processing drum, increasing the dehumidification capacity of the evaporator, and ensuring that the clothes dry quickly. In other words, by controlling the return air bypass volume and optimizing the heat recovery mechanism of the heat pump system, this embodiment can reduce the evaporator load in the early and middle stages of drying, increase the dehumidification effect of the return air, and indirectly make the relative humidity of the air sent into the fabric processing drum lower, accelerating the rapid evaporation of moisture from the clothes in the fabric processing drum and improving the dehumidification effect. Attached Figure Description

[0044] Figure 1 This is a schematic diagram illustrating the operating principle of the fabric processing equipment in the embodiments of this application;

[0045] Figure 2 This is a schematic diagram of the control logic of the fabric processing equipment in the embodiments of this application.

[0046] in:

[0047] 100 - Drying air duct; 101 - Return air inlet; 102 - Air outlet;

[0048] 200 - Evaporator;

[0049] 300-Condenser;

[0050] 400-ventilated heat exchanger;

[0051] 500-Bypass ventilation duct;

[0052] 600 - Auxiliary heating equipment;

[0053] 700 - Adjustment mechanism;

[0054] 800-compressor;

[0055] 900-Cooling Fan;

[0056] 1000 - On / off mechanism. Detailed Implementation

[0057] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0058] Throughout the specification and claims, the following terms will have at least the meaning explicitly associated herein, unless the context otherwise requires. The meanings defined below are not intended to limit the terms, but are merely illustrative examples.

[0059] In the description of this invention, the phrase "in one embodiment" does not necessarily refer to the same embodiment, although it may refer to the same embodiment. Similarly, the phrase "in some embodiments," as used herein, does not necessarily refer to the same embodiment when used multiple times, although it may refer to the same embodiment. As used herein, the term "or" is an inclusive "or" operator and is equivalent to the term "and / or," unless the context clearly specifies otherwise. The term "based on" is not exclusive and allows for reliance on additional factors not described, unless the context clearly specifies otherwise. The word "exemplary" herein means "used as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. The scope of this invention is limited only by the scope of the appended claims, and any examples set forth in this specification are not intended to be limiting, but merely illustrate some of the many possible embodiments of the claimed invention. The various embodiments provided in this invention should not be construed as limiting the scope of protection of this invention.

[0060] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0062] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0064] Background Introduction

[0065] With the development of society and the economy and the improvement of people's living standards, the demand for high-quality clothing drying is increasing. In modern households, clothes dryers have become an indispensable home appliance. However, the household dryers currently on the market mainly use two methods: electric drying and heat pump drying. These two methods have obvious shortcomings in terms of energy efficiency and performance, and cannot fully meet users' needs for efficient, energy-saving, and high-quality drying.

[0066] Specifically, electric drying technology is widely used due to its ease of operation, but its biggest problem is low energy efficiency and high energy consumption. Electric dryers consume a large amount of electricity during operation, increasing users' electricity bills and failing to meet energy conservation and environmental protection requirements. For example, a typical electric dryer may consume 2-3 kilowatt-hours of electricity in one drying cycle, which is a significant expense for a family. Therefore, electric drying technology is gradually showing its limitations and cannot meet the modern family's pursuit of a green and low-carbon lifestyle.

[0067] In contrast, heat pump drying technology has higher energy efficiency and can significantly reduce energy consumption. However, heat pump dryers also have problems such as a mismatch between cooling and heating capacity. Heat pump dryers absorb heat from the environment and convert it into high-temperature heat energy for drying clothes, greatly reducing direct electricity consumption. However, during the operation of the heat pump system, it is difficult to balance the cooling capacity of the evaporator and the heating capacity of the condenser with the dehumidification and heating of the fabric handling drum. For example, in the early stage of drying, the air temperature of the fabric handling drum cannot reach the target value quickly, while in the later stage of drying, the return air of the fabric handling drum has a lower moisture content and a higher temperature, resulting in a lower dew point temperature and a significant reduction in the dehumidification effect of the evaporator.

[0068] For compressors, a significant amount of heat is generated during the mid-to-late stages of operation. If this waste heat is not dissipated promptly, it can lead to excessively high system temperatures, affecting system performance and lifespan. Furthermore, the method of using a heat pump system to first cool and dehumidify the air before reheating it inherently wastes some heat. Moreover, relying solely on the four main components (evaporator, condenser, and compressor) limits the dehumidification capacity of the evaporator and the heating capacity of the condenser. Overly large matching results in excessive energy consumption, while underlying matching fails to meet drying and dehumidification requirements. Therefore, existing heat pump dryers still have considerable room for improvement in terms of rapid heating, increased dehumidification capacity, improved heat pump cycle performance, and reduced energy consumption. Specifically, this is reflected in the following aspects:

[0069] 1. Slow Heating in the Initial Drying Stage: In the initial drying stage, the heat pump system relies solely on cooling and dehumidifying before heating, resulting in a slow temperature rise of the air entering the fabric treatment drum, thus extending the drying time. However, at this stage, the dehumidification demand is high, and the system needs to rapidly increase the temperature to meet this requirement. Existing heat pump systems perform poorly in this regard. For example, some heat pump dryers experience a slow temperature rise in the first 10-40 minutes after startup, failing to quickly reach the required drying temperature. This not only prolongs the overall drying time but also affects the drying effect.

[0070] 2. High Energy Efficiency Requirements in the Later Stages of Drying: In the later stages of drying, as clothes gradually dry, the energy efficiency requirements of the heat pump system increase. At this time, the system needs to maintain a high temperature while also requiring high dehumidification efficiency to ensure the clothes are thoroughly dried. However, the energy efficiency of existing heat pump systems in this stage is not ideal, easily leading to increased energy consumption. Especially when clothes are nearly dry, the evaporator temperature is high, making it difficult to lower the return air temperature of the fabric treatment drum to the dew point temperature. Existing heat pump systems have low energy efficiency at high temperatures, resulting in increased energy consumption and affecting the overall energy-saving effect.

[0071] 3. Changes in dehumidification efficiency: During the drying process, dehumidification efficiency varies depending on the dryness of the clothes and the temperature of the circulating air inside the fabric processing drum. In the early stages of drying, the return air temperature of the fabric processing drum is low, and its dew point temperature is high, resulting in higher dehumidification efficiency. However, the demand for dehumidification from the clothes is greater in the early stages. In the later stages of drying, as the moisture content of the clothes decreases, the airflow becomes less effective at removing moisture, leading to a higher return air temperature and a lower dew point temperature in the fabric processing drum, significantly reducing dehumidification efficiency. Existing heat pump dryers often cannot flexibly adjust to these changes, resulting in decreased energy efficiency.

[0072] 4. Significant compressor overheating: High-temperature overheating is a common problem during the operation of heat pump systems, especially in the middle and later stages. The compressor will generate a lot of waste heat. If it is not cooled in time, the operating efficiency of the heat pump system will be greatly reduced, and the service life of the heat pump system will be shortened, reducing the usage time.

[0073] These issues not only affect the user experience but also limit the further promotion and application of heat pump drying technology.

[0074] Based on this, Figures 1-2 As shown, the first aspect of this application provides a fabric treatment tube;

[0075] The drying air duct 100 has a return air inlet 101 and an air outlet 102. The drying air duct 100 forms a circulating drying air path with the fabric processing cylinder through the return air inlet 101 and the air outlet 102.

[0076] The heat pump system includes an evaporator 200 and a condenser 300 located on the path of the drying air duct 100, and a ventilated heat exchanger 400 between the evaporator 200 and the condenser 300. The evaporator 200 is located near the return air inlet 101 of the drying air duct 100, and the condenser 300 is located near the air outlet 102 of the drying air duct 100.

[0077] A bypass ventilation duct 500 has an air inlet connected to the air inlet side of the evaporator 200 and an air outlet connected to the ventilation heat exchanger 400. An auxiliary heating device 600 is also provided inside the bypass ventilation duct 500.

[0078] The bypass ventilation duct 500 is equipped with an adjustment mechanism 700 at its air inlet for regulating the opening of the air inlet. The adjustment mechanism 700 controls the opening of the bypass ventilation duct 500 based on the return air temperature at the return air inlet 101 of the drying duct 100 and / or the outlet air temperature at the outlet air outlet 102 of the drying duct 100. Specifically, obtaining the temperature at the outlet air outlet 102 of the drying duct 100 is more direct, as this temperature is the inlet air temperature of the fabric processing cylinder. Monitoring the return air temperature of the drying duct 100 can determine the effectiveness of heat reuse in the return air; a higher temperature indicates higher heat reuse, and a lower temperature indicates lower heat reuse.

[0079] In this embodiment, a bypass ventilation duct 500, which is connected and disconnectable with the drying duct 100 and the ventilated heat exchanger 400, is provided. The size of the air inlet of the bypass ventilation duct 500 is adaptively adjusted according to the temperature of the return air inlet 101 of the drying duct 100. This allows the heat pump system to recover and utilize some of the heat from the return air of the fabric processing drum and the auxiliary heating equipment 600 during the early stages of drying. This is equivalent to adding a preheating device before the condenser 300, which can quickly raise the temperature to the required level after startup, significantly shortening the drying time and improving drying efficiency. Simultaneously, by bypassing part of the high-temperature, high-humidity return air from the fabric processing drum, the dehumidification amount through the evaporator 200 is reduced. Utilizing the recovered heat, the heat pump system can provide more heat in the early stages of drying, thereby increasing the dew point temperature of the return air from the fabric processing drum, increasing the dehumidification capacity of the evaporator 200, and ensuring rapid drying of clothing. In this embodiment of the application, by controlling the return air bypass volume and optimizing the heat recovery mechanism of the heat pump system, the evaporator load can be reduced in the early and middle stages of drying, and the effect of return air dehumidification can be increased. This indirectly results in a lower relative humidity of the air sent into the fabric treatment drum, which accelerates the rapid evaporation of moisture from the fabric inside the drum and improves the dehumidification effect.

[0080] Furthermore, in some possible implementations, the opening degree of the air inlet of the bypass duct 500 is negatively correlated with the temperature at the return air inlet 101 of the drying duct 100.

[0081] Furthermore, in some possible implementations, if the temperature at the return air inlet 101 of the drying air duct 100 is greater than or equal to the first preset return air temperature value, the regulating mechanism 700 controls the air inlet of the bypass air duct 500 to close.

[0082] If the temperature at the return air inlet 101 of the drying air duct 100 is lower than the first preset return air temperature value, the regulating mechanism 700 adjusts the opening of the air inlet of the bypass air duct 500 according to the degree to which the temperature at the return air inlet 101 of the drying air duct 100 is lower than the first preset return air temperature value.

[0083] Specifically, such as Figure 1 As shown, the air entering the fabric treatment drum is sent to the fabric treatment drum to exchange heat and moisture with the clothes inside for drying. Then it is sent to the return air inlet 101 of the fabric treatment drum. The regulating valve is opened or closed according to the drying process status. When closed, all the return air of the fabric treatment drum first passes through the evaporator 200 for cooling and dehumidification, then passes through the ventilation heat exchanger 400 for preheating, and finally passes through the condenser 300 for heating before being sent to the fabric treatment drum. This cycle continues. When the regulating valve, which is the regulating mechanism 700, is opened, part of the return air of the fabric treatment drum still follows the above process. The other part of the return air is bypassed according to the drying status by controlling the opening degree of the regulating valve. At this time, if the temperature of the return air of the fabric treatment drum is low, the bypass return air is first heated by auxiliary heating and then enters the ventilation heat exchanger 400 to exchange heat with the return air treated by the evaporator 200, so as to achieve the preheating of the air supplied to the fabric treatment drum.

[0084] Furthermore, in some possible implementations, the heat pump system also includes a compressor 800 connected to the evaporator 200 and the condenser 300 via refrigerant piping, and a cooling fan 900 for dissipating heat from the compressor 800.

[0085] The fabric processing equipment also includes a heat dissipation duct, which is equipped with an on / off mechanism 1000 for opening or closing the heat dissipation duct.

[0086] When the heat dissipation duct is open, the operating heat dissipation fan 900 can send the heat dissipation air of the compressor 800 to the ventilation heat exchanger 400 to mix the heat dissipation air of the compressor 800 with the heat exchange air after heat exchange in the evaporator 200.

[0087] If the return air temperature of the fabric treatment cylinder is high, and when the openable and closable valve of the on / off mechanism 1000 is opened, the bypass return air mixes with the hot air that has exchanged heat with the compressor 800, and is then sent to the ventilation heat exchanger 400 to exchange heat with the return air that has been treated by the evaporator 200. At this time, the operating power of the heat pump system can be reduced. In each ventilation operation process, different heat recovery and utilization and increased dehumidification efficiency can be achieved.

[0088] It should be noted that the "ventilated heat exchanger 400" mentioned in the embodiments of this application refers to an internally ventilated heat exchanger, specifically an air-to-air heat exchanger that is ventilated both internally and externally, in order to ensure that the air recovering heat can effectively exchange heat with the air at the outlet of the evaporator 200. However, the specific size and selection are determined according to the manufacturer's requirements and product requirements.

[0089] Furthermore, in some possible implementations, if the temperature of the compressor 800 is lower than the first preset compressor temperature value, the on / off mechanism 1000 can control the cooling air duct to close.

[0090] If the temperature of compressor 800 is higher than the first preset compressor temperature value, the on / off mechanism 1000 can control the opening of the heat dissipation duct.

[0091] It should be noted that the first preset compressor temperature value and the first preset return air temperature value are two monitoring temperatures controlled by the system. The specific values ​​can be determined according to the product and manufacturer's requirements. Generally speaking, the first preset compressor temperature value is set to the compressor's overheat protection temperature of 800°C, while the first preset return air temperature value is the set value of the return air temperature of the fabric processing drum or the set value of the inlet air temperature. These two temperatures are two important parameters for judging the drying stage of the fabric processing equipment.

[0092] Furthermore, in some possible implementations, when the cooling duct is open, the operating speed of the cooling fan 900 is positively correlated with the temperature of the compressor 800.

[0093] Specifically, the drying process of the entire fabric processing equipment is divided according to the change in the return air temperature of the fabric processing drum. Based on the temperature rise of the compressor 800, the temperature is divided into high and low ranges: the range below set temperature 1, the range from set temperature 1 to set temperature 2, and the range from set temperature 2 to set temperature 3. The order of magnitude is: set temperature 3 ≥ set temperature 2 ≥ set temperature 1. According to the temperature change of the compressor 800, when the temperature is in the set temperature 1 range, the fan operates at operating speed 1; when the temperature rises to the set temperature 2 range, the fan operates at operating speed 2; and when the temperature rises to the set temperature 3 range, the fan operates at operating speed 3. Among these, operating speed 3 > operating speed 2 > operating speed 1.

[0094] The return air from the fabric processing drum is divided into several temperature ranges: above temperature a, temperature a to temperature b, temperature b to temperature c, and below temperature c, with the order being a > b > c. When the system determines that the return air temperature is higher than temperature a, the regulating valve closes; when the return air temperature is between temperature a and temperature b, the regulating valve opens to opening a; when the return air temperature is between temperature b and temperature c, the regulating valve opens to opening b, and the small auxiliary heating device 600 is activated; when the return air temperature is lower than temperature c, the regulating valve opens to opening c. The above process ends when the system determines that the entire drying process is complete.

[0095] Specifically, fabric processing equipment also includes:

[0096] Temperature sensor, used to acquire temperature values ​​of return air inlet 101 and air inlet of drying duct 100 when the fabric processing equipment is running the drying program.

[0097] The controller is used to terminate the drying program when the temperature at the return air inlet 101 and the temperature at the outlet 102 of the drying duct 100 are the same or the difference between them is less than a preset difference.

[0098] Of course, in some possible implementations, other parameters can be used to control whether the drying process ends. For example, in some implementations, the moisture content in the return airflow can be used to determine whether the drying is complete, thereby controlling whether the drying process ends.

[0099] Furthermore, in some possible implementations, the fabric treatment equipment described above is a heat pump dryer.

[0100] Furthermore, a second aspect of this application also provides a drying control method for a fabric processing device, applied to the aforementioned fabric processing device, the drying control method comprising:

[0101] During the drying process, the temperature value at the return air inlet 101 of the drying air duct 100 is obtained, and the opening of the bypass ventilation duct 500 is adjusted according to the temperature value at the return air inlet 101 of the drying air duct 100.

[0102] Furthermore, in some possible implementations, adjusting the opening of the bypass duct 500 based on the temperature value at the return air inlet 101 of the drying duct 100 includes:

[0103] If the temperature at the return air inlet 101 of the drying air duct 100 is greater than or equal to the first preset return air temperature value, then the air inlet of the bypass air duct 500 is closed.

[0104] If the temperature at the return air inlet 101 of the drying air duct 100 is less than the first preset return air temperature value, the opening of the air inlet of the bypass air duct 500 shall be adjusted according to the degree to which the temperature at the return air inlet 101 of the drying air duct 100 is less than the first preset return air temperature value.

[0105] The opening degree of the air inlet of the bypass ventilation duct 500 is negatively correlated with the temperature at the return air inlet 101 of the drying air duct 100.

[0106] Furthermore, in some possible implementations, the control method further includes:

[0107] The temperature value of compressor 800 is obtained, and the opening and closing of the heat dissipation duct is controlled according to the temperature value of compressor 800.

[0108] Furthermore, in some possible implementations, the opening and closing of the cooling duct is controlled based on the temperature value of the compressor 800, including:

[0109] If the temperature of compressor 800 is lower than the first preset compressor temperature value, the cooling air duct will be closed.

[0110] If the temperature of compressor 800 is higher than the first preset compressor temperature value, the cooling air duct will be opened.

[0111] Furthermore, in some possible implementations, the drying control method further includes:

[0112] When the cooling duct is open, the operating speed of the cooling fan 900 is adjusted according to the temperature value of the compressor 800;

[0113] The operating speed of the cooling fan 900 is positively correlated with the temperature of the compressor 800.

[0114] Furthermore, in some possible implementations, during the drying process, the temperature values ​​at the return air inlet 101 and the air inlet of the drying air duct 100 are obtained.

[0115] If the temperature of the return air inlet 101 and the air outlet 102 of the drying air duct 100 are the same or the difference between them is less than the preset difference, the drying program will end.

[0116] Specifically, to better understand the drying control method of the fabric treatment equipment in the embodiments of this application, the fabric treatment equipment is described below as a heat pump dryer, combined with... Figure 2 A detailed explanation follows:

[0117] The control method in this example is as follows: Figure 2 As shown, when the heat pump dryer starts running, it first judges the drying process and the compressor 800 temperature, and the opening degree of the regulating valve is c > b > a.

[0118] When the inlet and outlet air temperatures of the fabric processing drum are higher than temperature a, it indicates that the drying process is in its later stages, and the regulating valve is closed; otherwise, the regulating valve is open. When the outlet air temperature of the fabric processing drum is between temperature a and temperature b, the regulating valve opens to opening a, recovering a small portion of the outlet air. When the outlet air temperature of the fabric processing drum is between temperature b and temperature c, the regulating valve opens to opening b, recovering a portion of the outlet air, and the auxiliary heating equipment 600 is activated. When the outlet air temperature of the fabric processing drum is lower than temperature c, the regulating valve opens to opening c, recovering a larger portion of the outlet air, and the auxiliary heating equipment 600 remains activated.

[0119] When the compressor 800 temperature is higher than the set temperature 1, it indicates that the system has passed the initial operation stage and is in the middle or later stages of the initial operation stage, or the middle or late stages of the entire drying process. Alternatively, the compressor 800 may be operating at high power and generating significant heat, requiring cooling. In this case, valve 2 can be opened; otherwise, valve 2 can be closed. When the compressor 800 temperature is higher than the set temperature 1 but not higher than the set temperature 2, the fan operates at speed 1 to cool the compressor 800 and recover the heat load. When the compressor 800 temperature is higher than the set temperature 2 but not higher than the set temperature 3, the fan operates at speed 2 to cool the compressor 800 and recover the heat load. When the compressor 800 temperature is higher than the set temperature 3, the fan operates at speed 3 and recovers the heat load.

[0120] It should be noted that in this example, temperature sensors are installed at the return air of the fabric processing cylinder, the air inlet of the fabric processing cylinder, the outlet of the compressor 800 or the body of the compressor 800, the evaporator 200, the condenser 300, and the ventilation heat exchanger 400 to collect the temperature at key locations and exchange data with the control cloud.

[0121] It should also be noted that in this example, the ventilation heat exchanger 400 is internally supplied with bypass return air or compressor 800 heat dissipation air, and externally supplied with return air treated by evaporator 200. The middle is fixed by a plate-type grid. Its size should take into account the prototype size, air volume, heat exchange capacity, etc., and should ensure that the air resistance to the return air of the fabric treatment cylinder is small and as close as possible to evaporator 200.

[0122] It should also be noted that in this example, the set temperature 1, set temperature 2, set temperature 3, running speed 1, running speed 2, running speed 3, temperature a, temperature b, temperature c, opening degree a, opening degree b, and opening degree c are set according to the system operating conditions, and other levels can be set as needed.

[0123] It should also be noted that in this example, the water-proof baffle does not completely block the openable and closeable valve. Its height is determined based on the maximum condensing efficiency of the evaporator 200. It should ensure that the water in the two evaporator boxes does not pass through the electrical box, and should ensure that its obstruction of the air supply of the cooling fan 900 is minimal.

[0124] It should also be noted that in this example, the regulating valve, the openable and closable valve, the fan, the compressor 800, and the auxiliary heating equipment 600 are all connected to the control cloud.

[0125] It should also be noted that in this example, the size of the bypass ventilation duct 500 is not limited to a specific size and can be designed according to the size of the whole unit.

[0126] It should also be noted that in this example, the temperature setting levels 1, 2, and 3 are not limited to three stages. More or fewer levels can be set according to the drying conditions and requirements.

[0127] It should also be noted that in this example, the operating speed levels 1, 2, and 3 are not limited to three stages; more or fewer levels can be set according to the drying conditions and requirements.

[0128] It should also be noted that in this example, the temperature levels a, b, and c are not limited to three stages; more or fewer levels can be set depending on the drying conditions and requirements.

[0129] It should also be noted that in this example, the opening degree levels a, b, and c are not limited to three stages; more or fewer levels can be set according to the drying conditions and requirements.

[0130] It should also be noted that, in this example, the auxiliary heating device 600 is not limited to a single form and size, and may be electric heating or other auxiliary heating depending on the requirements.

[0131] In the above embodiments of this application, the descriptions of each embodiment have their own emphasis. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. The steps illustrated in the related flowcharts can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown here. In other words, the order of steps described in the foregoing embodiments is merely an example. Reasonable adjustments to the order of steps based on the content of the embodiments of this application are also within the protection scope of the embodiments of this application.

[0132] The sequence numbers or order of description of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0133] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0134] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fabric processing device, characterized in that, include: Fabric treatment tube; The drying air duct (100) has a return air inlet (101) and an air outlet (102). The drying air duct (100) forms a circulating drying air path with the fabric processing cylinder through the return air inlet (101) and the air outlet (102). A heat pump system comprising an evaporator (200) and a condenser (300) located on the path of the drying duct (100), and a ventilated heat exchanger (400) between the evaporator (200) and the condenser (300), wherein the evaporator (200) is disposed near the return air inlet (101) of the drying duct (100), and the condenser (300) is disposed near the air outlet (102) of the drying duct (100); A bypass ventilation duct (500) is provided, the air inlet of which is connected to the air inlet side of the evaporator (200), the air outlet of which is connected to the ventilation heat exchanger (400), and an auxiliary heating device (600) is provided inside the bypass ventilation duct (500). The bypass ventilation duct (500) is provided with an adjustment mechanism (700) at the air inlet for adjusting the opening of the air inlet of the bypass ventilation duct (500). The heat pump system also includes a compressor (800) connected to the evaporator (200) and condenser (300) via refrigerant piping, and a cooling fan (900) for dissipating heat from the compressor (800). The fabric processing equipment also includes a heat dissipation duct, which is provided with an on / off mechanism (1000) for opening or closing the heat dissipation duct. When the heat dissipation duct is opened, the operating heat dissipation fan (900) can send the heat dissipation air of the compressor (800) to the ventilation heat exchanger (400) to exchange heat between the heat dissipation air of the compressor (800) and the return air processed by the evaporator (200). If the temperature of the compressor (800) is lower than the first preset compressor temperature value, the on / off mechanism (1000) controls the heat dissipation duct to close. If the temperature of the compressor (800) is higher than the first preset compressor temperature value, the on / off mechanism (1000) controls the opening of the heat dissipation duct.

2. The fabric processing equipment according to claim 1, characterized in that, The opening degree of the air inlet of the bypass ventilation duct (500) is negatively correlated with the temperature at the return air inlet (101) of the drying air duct (100).

3. The fabric processing equipment according to claim 2, characterized in that, If the temperature at the return air inlet (101) of the drying air duct is greater than or equal to the first preset return air temperature value, the regulating mechanism (700) controls the air inlet of the bypass air duct (500) to close. If the temperature at the return air inlet (101) of the drying air duct (100) is less than the first preset return air temperature value, the adjustment mechanism (700) adjusts the opening of the air inlet of the bypass air duct (500) according to the degree to which the temperature at the return air inlet (101) of the drying air duct (100) is less than the first preset return air temperature value.

4. The fabric processing equipment according to claim 1, characterized in that, When the heat dissipation duct is turned on, the operating speed of the heat dissipation fan (900) is positively correlated with the temperature of the compressor (800).

5. The fabric processing equipment according to claim 1, characterized in that, The fabric processing equipment also includes: A temperature sensor is used to acquire the temperature values ​​of the return air inlet (101) and the air inlet of the drying duct (100) when the fabric processing equipment is running a drying program. The controller is used to terminate the drying process when the temperature of the return air inlet (101) and the temperature of the air outlet (102) of the drying duct (100) are the same or the difference between them is less than a preset difference.

6. The fabric processing equipment according to any one of claims 1-5, characterized in that, The fabric treatment equipment is a heat pump dryer.

7. A drying control method for a fabric processing device, characterized in that, The drying control method, applied to the fabric treatment apparatus according to any one of claims 1-6, comprises: During the drying process, the temperature value at the return air inlet of the drying air duct is obtained, and the opening of the bypass air duct is adjusted according to the temperature value at the return air inlet of the drying air duct.

8. The drying control method according to claim 7, characterized in that, The step of adjusting the opening of the bypass ventilation duct according to the temperature value at the return air inlet of the drying air duct includes: If the temperature at the return air inlet of the drying air duct is greater than or equal to the first preset return air temperature value, then the air inlet of the bypass air duct is controlled to close. If the temperature at the return air inlet of the drying air duct is lower than the first preset return air temperature value, the opening of the air inlet of the bypass air duct is adjusted according to the degree to which the temperature at the return air inlet of the drying air duct is lower than the first preset return air temperature value. The opening degree of the air inlet of the bypass ventilation duct is negatively correlated with the temperature at the return air inlet of the drying air duct.

9. The drying control method according to claim 7, characterized in that, The control method further includes: The compressor temperature value is obtained, and the opening and closing of the heat dissipation duct is controlled according to the compressor temperature value.

10. The drying control method according to claim 9, characterized in that, The method of controlling the opening and closing of the heat dissipation duct based on the compressor temperature value includes: If the temperature of the compressor is lower than the first preset compressor temperature value, the heat dissipation air duct is controlled to close. If the temperature of the compressor is higher than the first preset compressor temperature value, the cooling air duct is opened.

11. The drying control method according to claim 10, characterized in that, The drying control method further includes: When the heat dissipation duct is open, the operating speed of the heat dissipation fan is adjusted according to the temperature value of the compressor; The operating speed of the cooling fan is positively correlated with the temperature of the compressor.

12. The drying control method according to claim 7, characterized in that, During the drying process, the temperature values ​​at the return air inlet and the air inlet of the drying air duct are obtained; If the return air temperature and the outlet air temperature of the drying duct are the same or the difference between them is less than a preset difference, the drying process will end.

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