Fabric treatment equipment and drying control method thereof

Abstract

The invention provides fabric treatment equipment and a drying control method of the fabric treatment equipment, and belongs to the technical field of fabric treatment equipment. The heat pump system can rapidly increase the temperature to the required level after being started, meanwhile, high-temperature and high-humidity fabric treatment cylinder heat return air is returned through a bypass part, the dehumidification amount of an evaporator is reduced, the recycled heat is utilized, the heat pump system can provide more heat in the early stage of drying, and the drying efficiency is improved. Therefore, the dew point temperature of return air of the fabric processing drum can be increased, the dehumidification amount of the evaporator is increased, the drying time is greatly shortened, the drying efficiency is improved, and clothes are rapidly dried. And the wind speed of the cooling fan is adaptively adjusted according to the temperature change of the compressor, so that the superheat degree of the heat pump system can be increased while the temperature of the compressor can be effectively reduced in the middle and later periods of the operation of the compressor, and the power of the heat pump system can be reduced, so that the operation efficiency of the system is improved. And the service life of equipment is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of fabric processing equipment, and in particular to a fabric processing equipment and a drying control method for the fabric processing equipment. Background Art

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

[0003] In modern families, clothes dryers have become one of the indispensable household appliances. However, the household dryers currently on the market mainly use two methods: electric drying and heat pump drying. These two methods have obvious deficiencies in energy efficiency and performance, and cannot fully meet users' needs for efficient, energy-saving and high-quality drying. Summary of the invention

[0004] The embodiment of the present application provides a fabric processing device and a drying control method for the fabric processing device. By setting a bypass air duct that can be switched together with the drying air duct and the ventilation heat exchanger, and adaptively adjusting the size of the bypass air duct inlet according to the temperature value of the drying air duct return air outlet, the heat pump system can recover and utilize part of the heat of the fabric processing drum return air and the auxiliary heating device in the early stage of drying, which is equivalent to adding a set of preheating devices in front of the condenser. After starting, the temperature can be quickly raised to the required level, greatly shortening the drying time and improving the drying efficiency. At the same time, the hot return air of the fabric processing drum with high temperature and high humidity is bypassed by part of the return air, reducing the dehumidification amount passing through the evaporator. By 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 fabric processing drum return air, increasing the dehumidification amount of the evaporator, and ensuring that the clothes are dried quickly. That is, in the embodiment of the present application, by controlling the return air bypass volume and optimizing the heat recovery mechanism of the heat pump system, the burden on the evaporator can be reduced in the early and middle stages of drying, and the return air dehumidification effect can be increased, thereby indirectly lowering the relative humidity of the air delivered to the fabric treatment drum, accelerating the rapid evaporation of moisture from the fabric in the fabric treatment drum, and improving the dehumidification effect. Specifically:

[0005] A first aspect of an embodiment of the present application provides a fabric processing device, comprising:

[0006] Fabric treatment cylinder;

[0007] The drying air duct has a return air port and an air outlet, and the drying air duct forms a circulating drying air path with the fabric processing cylinder through the return air port and the air outlet;

[0008] The heat pump system includes an evaporator and a condenser located on the drying air duct path, and a ventilation heat exchanger between the evaporator and the condenser, the evaporator is arranged close to the return air outlet of the drying air duct, and the condenser is arranged close to the air outlet of the drying air duct;

[0009] A bypass air duct, the air inlet of the bypass air duct is connected to the air inlet side of the evaporator, the air outlet is connected to the ventilation heat exchanger, and an auxiliary heating device is arranged inside the bypass air duct which is controlled to start when the bypass air duct is opened;

[0010] The air inlet of the bypass air duct is provided with an adjusting mechanism for adjusting the opening of the air inlet of the bypass air duct, and the adjusting mechanism is used to control the opening of the air inlet of the bypass air duct according to the return air temperature at the return air outlet of the drying air duct.

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

[0012] In the above technical solution, if the temperature at the return air outlet 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 be closed;

[0013] If the temperature at the return air outlet of the drying air duct is lower than the first preset return air temperature value, the regulating mechanism adjusts the air inlet opening of the bypass air duct according to the degree to which the temperature at the return air outlet 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 further includes a compressor connected to the evaporator and the condenser through a refrigerant pipeline, and a heat dissipation fan for dissipating heat from the compressor;

[0015] The fabric processing device also includes a heat dissipation air duct, and the heat dissipation air duct is provided with an on-off mechanism for opening or closing the heat dissipation air duct;

[0016] When the cooling air duct is opened, the running cooling fan can send the cooling air of the compressor to the ventilation heat exchanger to mix the cooling air of the compressor 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 be closed;

[0018] If the temperature of the compressor is higher than the first preset compressor temperature value, the on-off mechanism can be used to control the heat dissipation air duct to open.

[0019] In the above technical solution, when the heat dissipation air duct is opened, the running 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 air inlet of the bypass air duct.

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

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

[0023] A temperature sensor is used to obtain the temperature values ​​of the return air outlet and the air inlet of the drying duct when the fabric processing equipment runs a drying program;

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

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

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

[0027] Under the drying program, the temperature value at the return air outlet 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 outlet of the drying air duct.

[0028] In the above technical solution, the opening of the bypass air duct is adjusted according to the temperature value at the return air outlet of the drying air duct, including:

[0029] If the temperature at the return air outlet 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 is controlled to be closed;

[0030] If the temperature at the return air outlet 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 accordingly according to the degree to which the temperature at the return air outlet of the drying air duct is lower than the first preset return air temperature value;

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

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

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

[0034] In the above technical solution, the opening and closing of the heat dissipation air duct is controlled according to the temperature value of the compressor, including:

[0035] If the temperature of the compressor is lower than a first preset compressor temperature value, the heat dissipation air duct is controlled to be closed;

[0036] If the temperature of the compressor is higher than a first preset compressor temperature value, the heat dissipation air duct is controlled to open.

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

[0038] When the cooling air duct is opened, the operating speed of the cooling fan is adjusted 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, in the drying process, the temperature values ​​at the return air outlet and the air inlet of the drying air duct are obtained;

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

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

[0043] In the embodiment of the present application, a bypass air duct that can be switched together with the drying air duct and the ventilation heat exchanger is set, and the size of the bypass air duct inlet is adaptively adjusted according to the temperature value of the drying air duct return air outlet, so that the heat pump system can recover and utilize part of the heat of the fabric treatment drum return air and the auxiliary heating equipment in the early stage of drying, which is equivalent to adding a set of preheating devices in front of the condenser, and can quickly raise the temperature to the required level after starting, greatly shortening the drying time and improving the drying efficiency. At the same time, the hot return air of the fabric treatment drum with high temperature and high humidity is bypassed by part of the return air, reducing the dehumidification amount passing through the evaporator. By 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 fabric treatment drum return air, increasing the dehumidification amount of the evaporator, and ensuring that the clothes are dried quickly. That is, in the embodiment of the present application, by controlling the return air bypass amount and optimizing the heat recovery mechanism of the heat pump system, the evaporator burden can be reduced in the early and middle stages of drying, and the return air dehumidification effect can be increased, thereby indirectly making the relative humidity of the air sent to the fabric treatment drum lower, accelerating the rapid evaporation of moisture in the fabric treatment drum, and improving the dehumidification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the operating principle of the fabric processing device in the embodiment of the present application;

[0045] Figure 2 This is a control logic diagram of the fabric processing device in the embodiment of the present application.

[0046] in:

[0047] 100-drying air duct; 101-return air outlet; 102-air outlet;

[0048] 200-evaporator;

[0049] 300-condenser;

[0050] 400-ventilation heat exchanger;

[0051] 500-Bypass duct;

[0052] 600- auxiliary heating equipment;

[0053] 700-adjustment mechanism;

[0054] 800-compressor;

[0055] 900-Cooling fan;

[0056] 1000-On / off mechanism. DETAILED DESCRIPTION

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

[0058] Throughout the specification and claims, the following terms have at least the meanings explicitly associated herein, unless the context dictates otherwise. The meanings identified below do not necessarily limit the terms, but merely provide illustrative examples of the terms.

[0059] In the description of the present 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, when used multiple times, does not necessarily refer to the same embodiment, 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 dictates otherwise. The term "based on" is not exclusive and allows for additional factors not described, unless the context clearly dictates otherwise. The word "exemplary" means "used as an example, instance or illustration" in this article. Any embodiment described herein as "exemplary" is not necessarily interpreted as being superior or superior to other embodiments. The scope of the present 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 only to set forth some of the many possible embodiments of the claimed invention. The various embodiments provided by the present invention should not be interpreted as limiting the scope of protection of the present invention.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0064] Background

[0065] With the development of social economy and the improvement of people's living standards, people's demand for high-quality drying of clothes is growing. In modern families, clothes dryers have become one of the indispensable household appliances. However, the household dryers currently on the market mainly use two methods: electric drying and heat pump drying. These two methods have obvious deficiencies in energy efficiency and performance, and cannot fully meet users' needs for high-efficiency, energy-saving and high-quality drying.

[0066] Specifically, electric drying technology is widely used because of its easy operation, but its biggest problem is low power utilization and high energy consumption. Electric dryers consume a lot of electricity during operation, which not only increases the user's electricity bill, but also does not meet the requirements of energy conservation and environmental protection. For example, an ordinary electric dryer may consume 2-3 kWh of electricity in a drying cycle, which is a considerable expense for a family. Therefore, electric drying technology has gradually shown its limitations and is difficult to meet the pursuit of green and low-carbon lifestyles by modern families.

[0067] In contrast, heat pump drying technology has high energy efficiency and can significantly reduce energy consumption, but heat pump dryers also have problems such as mismatch between cooling capacity 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 consumption of electricity. However, during the operation of the heat pump system, its evaporator cooling capacity and condenser heating capacity are difficult to balance the dehumidification and heating of the circulating air in the fabric treatment drum. For example, in the early stage of drying, the air supply temperature of the fabric treatment drum cannot quickly reach the target value, and in the later stage of drying, due to the lower moisture content and higher temperature of the return air from the fabric treatment drum, its dew point temperature is low, and the dehumidification effect of the evaporator is greatly reduced.

[0068] For the compressor, a lot of heat will be generated when it is running in the middle and late stages. If this waste heat is not dissipated in time, it will cause the system temperature to be too high, affecting the system's operating performance and life. In addition, the method of using a heat pump system to first cool and dehumidify the dry air and then heat it up essentially wastes some heat, and the operation of the four major components alone has limited evaporator dehumidification and condenser heating. Too much matching will result in excessive energy consumption, and too little matching will be difficult to meet drying and dehumidification requirements. Therefore, the existing heat pump dryers still have a lot of room for improvement in terms of rapid heating, increased dehumidification, improved heat pump cycle performance, and reduced energy consumption. Specifically, it is manifested in the following aspects:

[0069] 1. Slow temperature rise in the early stage of drying: In the early stage of drying, the heat pump system only relies on cooling and dehumidification first and then heating, which makes the temperature rise slowly for the air entering the fabric treatment drum, resulting in longer drying time. However, at this time, the dehumidification demand is large, and the system needs to quickly increase the temperature to meet the dehumidification demand. The existing heat pump system performs poorly in this regard. For example, some heat pump dryers have a slow temperature rise rate in the first 10-40 minutes after startup, and cannot quickly reach the required drying temperature, which not only prolongs the overall drying time, but also affects the drying effect.

[0070] 2. High energy efficiency requirements in the later stage of drying: In the later stage of drying, as the clothes gradually dry, the energy efficiency requirements for the heat pump system are higher. At this time, the system needs to maintain a high temperature but also requires high dehumidification efficiency to ensure that the clothes are thoroughly dried. However, the energy efficiency performance of the existing heat pump system at this stage is not ideal, which easily leads to increased energy consumption. Especially when the clothes are close to dry, the evaporator temperature is high, and it is difficult to reduce the return air temperature of the fabric treatment drum to the dew point temperature. The existing heat pump system has low energy efficiency at high temperatures, resulting in increased energy consumption, affecting the overall energy saving effect.

[0071] 3. Changes in dehumidification efficiency: During the drying process, the dehumidification efficiency will change with the degree of dryness of the clothes and the temperature of the circulating air in the fabric treatment drum. In the early stage of drying, the return air temperature of the fabric treatment drum is low, its dew point temperature is high, and the dehumidification efficiency is high, but the demand for dehumidification of clothes is greater in the early stage; in the later stage of drying, as the moisture content of the clothes themselves decreases, the air supply is difficult to take away its moisture, the return air temperature of the fabric treatment drum is high, the dew point temperature is also low, and the dehumidification efficiency is greatly reduced. Existing heat pump dryers are often unable to flexibly adjust to cope with such changes, resulting in reduced energy efficiency.

[0072] 4. The compressor heats up obviously: During the operation of the heat pump system, high temperature heating is a common problem, especially in the middle and late stages. The compressor will generate a lot of waste heat. If it is not cooled down 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 problems not only affect the user experience, but also limit the further promotion and application of heat pump drying technology.

[0074] Based on this, Figure 1-Figure 2 As shown, a first aspect of an embodiment of the present application provides a fabric processing drum;

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

[0076] The heat pump system includes an evaporator 200 and a condenser 300 located on the drying air duct 100, and a ventilation heat exchanger 400 between the evaporator 200 and the condenser 300. The evaporator 200 is arranged close to the return air port 101 of the drying air duct 100, and the condenser 300 is arranged close to the air outlet 102 of the drying air duct 100.

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

[0078] The air inlet of the bypass air duct 500 is provided with an adjusting mechanism 700 for adjusting the opening of the air inlet of the bypass air duct 500. The adjusting mechanism 700 is used to control the opening of the air inlet of the bypass air duct 500 according to the return air temperature at the return air inlet 101 of the drying air duct 100 and / or the outlet air temperature at the outlet 102 of the drying air duct 100. Specifically, it is more direct to obtain the temperature at the outlet 102 of the drying air duct 100, which is the air inlet temperature of the fabric processing drum, and monitoring the return air temperature of the drying air duct 100 can determine the effect of heat reuse in the return air. The higher the temperature, the higher the heat recovery utilization, and the lower the temperature, the lower the heat recovery utilization.

[0079] In the embodiment of the present application, a bypass duct 500 is provided which can be switched together with the drying duct 100 and the ventilation heat exchanger 400, and the size of the air inlet of the bypass duct 500 is adaptively adjusted according to the temperature value of the return air outlet 101 of the drying duct 100, so that the heat pump system can recover and utilize part of the heat of the return air of the fabric treatment drum and the auxiliary heating device 600 in the early stage of drying, which is equivalent to adding a set of preheating devices in front of the condenser 300, and can quickly raise the temperature to the required level after starting, greatly shortening the drying time and improving the drying efficiency. At the same time, the hot return air of the fabric treatment drum with high temperature and high humidity is bypassed by part of the return air, reducing the dehumidification amount passing through the evaporator 200. By 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 treatment drum, increasing the dehumidification amount of the evaporator 200, and ensuring that the clothes are dried quickly. That is, in the embodiment of the present application, by controlling the return air bypass volume and optimizing the heat recovery mechanism of the heat pump system, the burden on the evaporator 200 can be reduced in the early and middle stages of drying, and the return air dehumidification effect can be increased, thereby indirectly lowering the relative humidity of the air delivered to the fabric treatment drum, accelerating the evaporation of moisture from the fabric in the fabric treatment drum, and improving the dehumidification effect.

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

[0081] Further, in some possible implementations, if the temperature at the return air outlet 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 be closed;

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

[0083] Specifically, Figure 1 As shown, the air entering the fabric treatment drum is sent to the fabric treatment drum to undergo a heat and moisture exchange drying process with the clothes inside, and then sent to the return air port 101 of the fabric treatment drum. The regulating valve is opened or closed according to the drying process status. When it is closed, all the return air from 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, and the cycle continues; when the regulating valve serving as the regulating mechanism 700 is opened, part of the return air from the fabric treatment drum is still carried out according to the above process, and the bypass amount of the other part of the return air is controlled by the opening degree of the regulating valve according to the drying state. At this time, if the return air temperature of the fabric treatment drum is low, the bypass return air is first subjected to auxiliary heating and then enters the ventilation heat exchanger 400 for heat exchange with the return air processed by the evaporator 200, thereby realizing the preheating of the supply air from the fabric treatment drum.

[0084] Further, in some possible implementations, the heat pump system further includes a compressor 800 connected to the evaporator 200 and the condenser 300 through a refrigerant pipeline, and a heat dissipation fan 900 for dissipating heat from the compressor 800;

[0085] The fabric processing device also includes a heat dissipation air duct, on which an on / off mechanism 1000 for opening or closing the heat dissipation air duct is provided;

[0086] When the heat dissipation air duct is opened, the running heat dissipation fan 900 can deliver 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] That is, if the return air temperature of the fabric treatment drum is high, and when the on-off valve serving as the on-off mechanism 1000 is opened, the bypass return air is mixed with the hot air that has undergone heat exchange with the compressor 800, and then sent to the ventilation heat exchanger 400 to exchange heat with the return air processed by the evaporator 200. At this time, the operating power of the heat pump system can be reduced, and in each ventilation operation process, different amounts of heat can be recycled and utilized and the dehumidification efficiency can be increased.

[0088] It should be noted that the "ventilation heat exchanger 400" mentioned in the embodiment of the present application is an internal ventilation heat exchanger, specifically refers to a large category of air-to-air heat exchangers in which air is ventilated both inside and outside, so as to ensure that the air for recovering heat can effectively exchange heat with the air at the outlet of the evaporator 200, but the specific size and selection are determined according to the manufacturer's needs and product requirements.

[0089] Further, 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 may control the cooling air duct to be closed;

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

[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, which can be specifically determined according to the product and manufacturer's requirements. Generally speaking, the first preset compressor temperature value is set to the compressor 800 overheat protection temperature, and the first preset return air temperature value is the fabric processing drum return air temperature setting value or the inlet air temperature setting value. 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 heat dissipation air duct is opened, the operating speed of the heat dissipation 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. According to the temperature increase of the compressor 800, the temperature is divided into a high and low interval as a set temperature interval below 1, a set temperature 1 to set temperature 2, and a set temperature 2 to set temperature 3, and the size relationship is set temperature 3 ≥ set temperature 2 ≥ set temperature 1. According to the temperature change of the compressor 800, when its temperature is in the set temperature 1 interval, the fan runs at an operating speed of 1, when its temperature rises to the set temperature 2 interval, the fan runs at an operating speed of 2, and when its temperature rises to the set temperature 3 interval, the fan runs at an operating speed of 3, wherein operating speed 3> operating speed 2> operating speed 1.

[0094] When the return air of the fabric treatment drum is divided into the high and low intervals as the interval greater than temperature a, the interval between temperature a and temperature b, the interval between temperature b and temperature c, and the interval lower than temperature c, the magnitude is temperature a>temperature b>temperature c. When the system determines that the return air temperature is higher than temperature a, the regulating valve is closed; when the return air temperature of the fabric treatment drum is between temperature a and temperature b, the regulating valve is opened to a degree a; when the return air temperature of the fabric treatment drum is between temperature b and temperature c, the regulating valve is opened to a degree b, and the small auxiliary heating device 600 is turned on; when the return air temperature of the fabric treatment drum is lower than temperature c, the regulating valve is opened to a degree c. When the system determines that the entire drying process is completed, the above implementation ends.

[0095] Specifically, the fabric processing equipment also includes:

[0096] A temperature sensor, which is used to obtain the temperature values ​​of the return air outlet 101 and the air inlet of the drying duct 100 when the fabric processing device runs a drying program;

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

[0098] Of course, in some possible implementations, other parameters may be obtained to control whether the drying program ends. For example, in some implementations, the moisture content in the return air flow may be used to determine whether the drying is completed, thereby controlling whether the drying program ends.

[0099] Furthermore, in some possible implementations, the above-mentioned fabric processing device is a heat pump dryer.

[0100] Furthermore, the second aspect of the embodiment of the present application further provides a drying control method of a fabric processing device, which is applied to the above-mentioned fabric processing device, and the drying control method includes:

[0101] In the drying program, the temperature value at the return air outlet 101 of the drying air duct 100 is obtained, and the opening degree of the bypass air duct 500 is adjusted according to the temperature value at the return air outlet 101 of the drying air duct 100.

[0102] Further, in some possible implementations, adjusting the opening of the bypass air duct 500 according to the temperature value at the return air outlet 101 of the drying air duct 100 includes:

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

[0104] If the temperature at the return air outlet 101 of the drying air duct 100 is lower than the first preset return air temperature value, the air inlet opening of the bypass air duct 500 is adjusted accordingly according to the degree to which the temperature at the return air outlet 101 of the drying air duct 100 is lower than the first preset return air temperature value;

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

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

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

[0108] Further, in some possible implementations, controlling the opening and closing of the heat dissipation air duct according to the temperature value of the compressor 800 includes:

[0109] If the temperature of the compressor 800 is lower than the first preset compressor temperature value, the heat dissipation air duct is controlled to be closed;

[0110] If the temperature of the compressor 800 is higher than the first preset compressor temperature value, the heat dissipation duct is controlled to open.

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

[0112] When the heat dissipation air duct is opened, the operating speed of the heat dissipation 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] Further, in some possible implementations, in the drying process, the temperature values ​​at the return air outlet 101 and the air inlet of the drying air duct 100 are obtained;

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

[0116] Specifically, in order to make the drying control method of the fabric processing device in the embodiment of the present application more clear, the fabric processing device is taken as a heat pump dryer and combined with Figure 2 For specific instructions:

[0117] The control method of this example is as follows Figure 2 As shown, when the heat pump clothes dryer starts to run, the drying process and the temperature of the compressor 800 are first judged, and the opening degree of the regulating valve is opening degree c>opening degree b>opening degree a.

[0118] When the inlet and return air temperatures of the fabric treatment drum are higher than temperature a, it indicates that this is the late stage of drying and the regulating valve is closed, otherwise the regulating valve is opened; when the return air temperature of the fabric treatment drum is in the range of temperature a to temperature b, the regulating valve opens to a degree a to recover a small portion of the return air of the fabric treatment drum; when the return air temperature of the fabric treatment drum is in the range of temperature b to temperature c, the regulating valve opens to b to recover part of the return air of the fabric treatment drum, and the auxiliary heating device 600 is turned on at the same time; when the return air temperature of the fabric treatment drum is lower than temperature c, the regulating valve opens to c to recover a larger portion of the return air of the fabric treatment drum, and the auxiliary heating device 600 is still turned on.

[0119] When the temperature of compressor 800 is higher than the set temperature 1, it means that the system has passed the initial operation stage and is in the middle and later stages of the early operation or the middle and late stages of the entire drying process, or the compressor 800 has a large operating power and generates a large amount of heat, and needs to be cooled. The valve 2 can be opened, otherwise the valve 2 can be closed. When the temperature of compressor 800 is higher than the set temperature 1 but not higher than the set temperature 2, the fan runs at the operating speed 1 to cool the compressor 800 and recover the compressed heat load; when the temperature of compressor 800 is higher than the operating speed 2 but not higher than the operating temperature 3, the fan runs at the operating speed 2 to cool the compressor 800 and recover the heat load of compressor 800; when the temperature of compressor 800 is higher than the set temperature 3, the fan runs at the operating speed 3 and recovers the heat load of compressor 800.

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

[0121] It should also be noted that, in this example, the ventilation heat exchanger 400 has bypass return air or compressor 800 heat dissipation air passing through its interior, and return air processed by the evaporator 200 passing through its exterior, and is fixed in the middle by a sheet-type fence, the size of which should take into account the size of the prototype, air supply volume, heat exchange capacity, etc., and should ensure that the air resistance to the return air of the fabric processing cylinder is small, and should be as close to the evaporator 200 as possible.

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

[0123] It should also be noted that in this example, the water-blocking baffle does not completely block the openable and closable valve, and its height is determined based on the maximum condensing efficiency of the evaporator 200, to ensure that water in the two device boxes does not flow into the electrical box, and to ensure that its blocking effect on the air supply of the cooling fan 900 is small.

[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 device 600 are all connected to the control cloud.

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

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

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

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

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

[0130] It should also be noted that in this example, the auxiliary heating device 600 is not limited to a single form and a single size, and the device can be electrically heated or otherwise used for auxiliary heating as required.

[0131] In the above-mentioned embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The steps shown in the relevant flow chart can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flow chart, in some cases, the steps shown or described can be executed in an order different from that here. In other words, the order of steps described in the foregoing embodiments is only an example, and it is also within the scope of protection of the embodiments of the present application to reasonably adjust the order of steps based on the content of the embodiments of the present application.

[0132] The sequence of serial numbers or introduction of the embodiments of the present application is for description only and does not represent the superiority or inferiority of the embodiments.

[0133] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0134] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fabric processing device, characterized in that: include: Fabric treatment cylinder; A drying air duct (100), the drying air duct (100) having an air return port (101) and an air outlet (102), the drying air duct (100) forming a circulating drying air path with the fabric processing drum through the air return port (101) and the air outlet (102); A heat pump system, the heat pump system comprising an evaporator (200) and a condenser (300) located on the path of the drying air duct (100), and a ventilation heat exchanger (400) between the evaporator (200) and the condenser (300), the evaporator (200) being arranged close to the return air port (101) of the drying air duct (100), and the condenser (300) being arranged close to the air outlet (102) of the drying air duct (100); A bypass air duct (500), wherein an air inlet of the bypass air duct (500) is connected to an air inlet side of the evaporator (200), an air outlet of the bypass air duct (500) is connected to the ventilation heat exchanger (400), and an auxiliary heating device (600) is provided inside the bypass air duct (500); The air inlet of the bypass air duct (500) is provided with an adjustment mechanism (700) for adjusting the opening of the air inlet of the bypass air duct (500).

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

3. The fabric processing device according to claim 2, characterized in that: If the temperature at the return air outlet (101) of the drying air duct is greater than or equal to a first preset return air temperature value, the regulating mechanism (700) controls the air inlet of the bypass air duct (500) to be closed; If the temperature at the return air outlet (101) of the drying air duct (100) is lower than a first preset return air temperature value, the regulating mechanism (700) adjusts the air inlet opening of the bypass air duct (500) according to the degree to which the temperature at the return air outlet (101) of the drying air duct (100) is lower than the first preset return air temperature value.

4. The fabric processing device according to any one of claims 1 to 3, characterized in that: The heat pump system further comprises a compressor (800) connected to the evaporator (200) and the condenser (300) via a refrigerant pipeline, and a heat dissipation fan (900) for dissipating heat from the compressor (800); The fabric processing device further comprises a heat dissipation air duct, and the heat dissipation air duct is provided with an on-off mechanism (1000) for opening or closing the heat dissipation air duct; When the heat dissipation air duct is opened, the running heat dissipation fan (900) can deliver 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).

5. The fabric processing device according to claim 4, characterized in that: If the temperature of the compressor (800) is lower than a first preset compressor temperature value, the on-off mechanism (1000) controls the heat dissipation air duct to close; If the temperature of the compressor (800) is higher than a first preset compressor temperature value, the on / off mechanism (1000) controls the heat dissipation air duct to open.

6. The fabric processing device according to claim 5, characterized in that: When the heat dissipation air duct is opened, the operating speed of the heat dissipation fan (900) is positively correlated with the temperature of the compressor (800).

7. The fabric processing device according to claim 4, characterized in that: The fabric processing device also includes: A temperature sensor, the temperature sensor being used to obtain temperature values ​​of an air return port (101) and an air inlet port of the drying air duct (100) when the fabric processing device runs a drying program; A controller is used to terminate the operation of the drying program when the temperature of the return air outlet (101) and the temperature of the air outlet (102) of the drying air duct (100) are the same or the difference between the two is less than a preset difference.

8. The fabric processing device according to any one of claims 1 to 7, characterized in that: The fabric processing device is a heat pump clothes dryer.

9. A drying control method for a fabric processing device, characterized in that: Applicable to the fabric processing device according to any one of claims 1 to 8, the drying control method comprises: In the drying program, the temperature value at the return air outlet 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 outlet of the drying air duct.

10. The drying control method according to claim 9, characterized in that: The step of adjusting the opening of the bypass air duct according to the temperature value at the return air outlet of the drying air duct comprises: If the temperature at the return air outlet of the drying air duct is greater than or equal to a first preset return air temperature value, the air inlet of the bypass air duct is controlled to be closed; If the temperature at the return air outlet 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 accordingly according to the degree to which the temperature at the return air outlet 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 air duct is negatively correlated with the temperature at the return air outlet of the drying air duct.

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

12. The drying control method according to claim 11, characterized in that: The controlling the opening and closing of the heat dissipation air duct according to the temperature value of the compressor comprises: If the temperature of the compressor is lower than a first preset compressor temperature value, the heat dissipation air duct is controlled to be closed; If the temperature of the compressor is higher than a first preset compressor temperature value, the heat dissipation air duct is controlled to open.

13. The drying control method according to claim 12, characterized in that: The drying control method further comprises: When the heat dissipation air duct is opened, adjusting the operating speed of the heat dissipation fan according to the temperature value of the compressor; The operating speed of the heat dissipation fan is positively correlated with the temperature of the compressor.

14. The drying control method according to claim 9, characterized in that: Under the drying program, obtaining the temperature values ​​at the return air outlet and the air inlet of the drying air duct; If the return air outlet temperature and the outlet temperature of the drying air duct are the same or the difference between the two is less than the preset difference, the drying program is terminated.

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