Clothes dryer

Abstract

The invention discloses a clothes dryer, which comprises a box body; a drying cylinder; a heating load; an auxiliary air supply module; the auxiliary air supply module comprises a power source; a decompression device; a speed regulating device; a drying air device; a load heat dissipation device; a reversing solenoid valve; a relay valve; a first wind speed sensor; a second wind speed sensor; the speed regulating device comprises a third electromagnetic valve, an inlet of which is connected with an outlet of the pressure reducing valve; an inlet of the fourth electromagnetic valve is connected with an outlet of the third electromagnetic valve and a pilot port of the relay valve; the controller is configured to obtain an actual wind speed value S'through the first flow speed or the second flow speed; the difference value between the expected air speed value S and the actual air speed value S'is defined as an error e, the output quantity u is obtained through PID control according to the error e, the power-on states of the third electromagnetic valve and the fourth electromagnetic valve are controlled according to the value of the output quantity u, and then the air speed of conveying air to the drying air device and / or the load heat dissipation device by the speed adjusting device is controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly relates to a dryer. Background Art

[0002] A dryer is a device for quickly drying wet clothes. The dryer includes a box body and a drying cylinder, and the clothes to be dried are placed in the drying cylinder.

[0003] Since hot air needs to be blown into the drying cylinder to dry the clothes, in the related art, a motor is usually used to drive the fan blades to rotate to push the air flow into the drying cylinder, so as to realize drying the clothes. However, this method binds the motor speed and the fan blade speed together, and it is impossible to realize more reasonable and accurate control of the wind speed of the drying air flow.

[0004] At the same time, heat generating loads such as motors and compressors are provided in the dryer. In the related art, a cooling fan is provided to dissipate heat from the heat generating loads. The cooling fan needs to be separately controlled by a circuit board, and the wind speed is fixed, and the cost is relatively high. The cooling fan cannot accurately adjust the wind speed of the cooling air flow according to the load temperature. Therefore, the present application proposes a dryer. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end,

[0006] According to an embodiment of the present disclosure, a dryer is provided, including:

[0007] A box body;

[0008] A drying cylinder, provided in the box body;

[0009] A heat generating load, provided in the box body, and the heat generating load can generate heat when it is turned on and running;

[0010] An auxiliary air supply module, provided in the box body, for supplying air to the drying cylinder and / or supplying air to the heat generating load; the auxiliary air supply module includes:

[0011] A power source, for providing compressed air;

[0012] A pressure reducing device, for reducing the pressure of the air flowing through the pressure reducing device, and the air inlet of the pressure reducing device is communicated with the air outlet of the power source;

[0013] A speed regulating device, for regulating the air flow rate, the air inlet of the speed regulating device is communicated with the air outlet of the pressure reducing device, and the speed regulating device outputs a pre-controlled flow rate;

[0014] A drying air device, for sending the air transmitted to the drying air device into the drying cylinder;

[0015] A load heat dissipation device for sending the air transmitted to the load heat dissipation device to flow through the heating load;

[0016] A reversing solenoid valve that is connected to the load heat dissipation device when energized and is connected to the drying air device when de-energized;

[0017] A relay valve, whose air inlet is connected to the air outlet of the power source and whose air outlet is connected to the inlet of the reversing solenoid valve; the pilot port of the relay valve is connected to the speed control device;

[0018] A first wind speed sensor for detecting the flow rate of the air between the reversing solenoid valve and the load heat dissipation device and recording the detected flow rate as the first flow rate;

[0019] A second wind speed sensor for detecting the flow rate of the air between the air outlet of the relay valve and the drying air device and recording the detected flow rate as the second flow rate;

[0020] The speed control device includes:

[0021] A third solenoid valve, whose inlet is connected to the outlet of the pressure reducing valve;

[0022] A fourth solenoid valve, whose inlet is connected to the outlet of the third solenoid valve and the pilot port of the relay valve;

[0023] A controller configured to:

[0024] Obtain an actual wind speed value S' through the first flow rate or the second flow rate;

[0025] Define the difference between the expected wind speed value S and the actual wind speed value S' as the error e;

[0026] Obtain an output u through PID control according to the error e;

[0027] Control the energized states of the third solenoid valve and the fourth solenoid valve according to the magnitude of the value of the output u, and control the wind speed at which the relay valve delivers air to the drying air device and / or the load heat dissipation device through the energized states of the third solenoid valve and the fourth solenoid valve.

[0028] This application detects and calculates the error e through PID control, and then outputs an accurate output u. By controlling the energization or de-energization of the third solenoid valve and the fourth solenoid valve according to the magnitude of the value of the output u, the control of the wind speed output by the relay valve is realized. The PID control logic of this application can more accurately control the actions of the third solenoid valve and the fourth solenoid valve.

[0029] This application also provides a dryer, including:

[0030] Cabinet;

[0031] Drying cylinder, disposed within the cabinet;

[0032] Heat load, disposed within the cabinet, the heat load capable of generating heat when the operation is turned on;

[0033] Auxiliary air supply module, disposed within the cabinet, for supplying air to the drying cylinder and / or to the heat load; The auxiliary air supply module includes:

[0034] Power source, for providing compressed air;

[0035] Pressure reducing device, for reducing the pressure of the air flowing through the pressure reducing device, the air inlet of the pressure reducing device being in communication with the air outlet of the power source;

[0036] Flow control device, for adjusting the air flow rate, the air inlet of the flow control device being in communication with the air outlet of the pressure reducing device, the flow control device outputting a pre-controlled flow rate;

[0037] Drying air device, for delivering the air transmitted to the drying air device to the drying cylinder;

[0038] Load heat dissipation device, for delivering the air transmitted to the load heat dissipation device to flow through the heat load;

[0039] Reversing solenoid valve, which is in communication with the load heat dissipation device when energized and is in communication with the drying air device when de-energized;

[0040] Relay valve, its air inlet being in communication with the air outlet of the power source and its air outlet being in communication with the inlet of the pressure passage; The pilot port of the relay valve is connected to the pressure regulating device; The relay valve receives the pre-controlled flow rate output by the flow control device, and the relay valve amplifies the flow rate according to the pre-controlled flow rate and outputs driving air to the reversing solenoid valve;

[0041] First air velocity sensor, for detecting the air velocity between the reversing solenoid valve and the load heat dissipation device and recording the detected air velocity as the first air velocity;

[0042] Second air velocity sensor, for detecting the air velocity of the air between the air outlet of the relay valve and the drying air device and recording the detected air velocity as the second air velocity;

[0043] The flow control device includes:

[0044] Third solenoid valve, its inlet being connected to the outlet of the pressure reducing valve;

[0045] Fourth solenoid valve, its inlet being connected to the outlet of the third solenoid valve and the pilot port of the relay valve;

[0046] A controller, configured to:

[0047] Obtain an actual wind speed value S' based on the first flow rate or the second flow rate;

[0048] Define the difference between the desired wind speed value S and the actual wind speed value S' as an error e;

[0049] Obtain an output u through PID control according to the error e;

[0050] Control the energization states of the third solenoid valve and the fourth solenoid valve according to the positive or negative value of the output u, and control the wind speed at which the relay valve delivers air to the drying air device and / or the load heat dissipation device through the energization states of the third solenoid valve and the fourth solenoid valve.

[0051] In some embodiments of the present application, the PID control includes: presetting a proportional term K p , an integral term K i , and a derivative term K d . Performing an operation on the proportional term K p and the error e at the k-th time to obtain a proportional parameter, performing an operation on the integral term K i and the sum of the errors e from the 1st to the k-th time to obtain an integral parameter, and performing an operation on the derivative term K d and the difference between the error at the k-th time and the error at the (k - 1)-th time to obtain a derivative parameter;

[0052] Adding the proportional parameter, the integral parameter, and the derivative parameter to obtain the value of the output u(k) at the k-th time.

[0053] In some embodiments of the present application, multiplying the proportional term K p by the error e at the k-th time to obtain the proportional parameter;

[0054] Multiplying the integral term K i by the sum of the errors e from the 1st to the k-th time to obtain the integral parameter;

[0055] Multiplying the derivative term K d by the difference between the error at the k-th time and the error at the (k - 1)-th time to obtain the derivative parameter.

[0056] In some embodiments of the present application, the controller is configured to: after a preset time interval, perform an operation according to the error e, the proportional term K p , the integral term K i , and the derivative term K d to obtain the value of the output u at the k-th time.

[0057] In some embodiments of the present application, when the output u is greater than 0, the third solenoid valve and the fourth solenoid valve are de-energized, and the relay valve increases the air delivery speed to the drying air device and / or the load heat dissipation device.

[0058] In some embodiments of the present application, when the output u is equal to 0, the third solenoid valve is de-energized and the fourth solenoid valve is energized, and the relay valve delivers air to the drying air device and / or the load heat dissipation device at a constant speed.

[0059] In some embodiments of the present application, when the output u is less than 0, the third solenoid valve and the fourth solenoid valve are energized, and the relay valve does not deliver air to the drying air device or the load heat dissipation device.

[0060] In some embodiments of the present application, the controller is configured such that when the controller controls the reversing solenoid valve to be de-energized, the fifth solenoid valve to be de-energized, the third solenoid valve to be de-energized, and the fourth solenoid valve to be de-energized, the auxiliary air supply module supplies air to the drying air device;

[0061] When the controller controls the reversing solenoid valve to be energized, the fifth solenoid valve to be de-energized, the third solenoid valve to be de-energized, and the fourth solenoid valve to be de-energized, the auxiliary air supply module supplies air to the load heat dissipation device.

[0062] In some embodiments of the present application, the controller is configured such that when the controller controls the reversing solenoid valve to be de-energized or energized, the fifth solenoid valve to be energized, the third solenoid valve to be de-energized, and the fourth solenoid valve to be de-energized, the auxiliary air supply module supplies air to the drying air device and the load heat dissipation device;

[0063] When the controller controls the reversing solenoid valve to be de-energized or energized, the fifth solenoid valve to be de-energized or energized, the third solenoid valve to be energized, and the fourth solenoid valve to be energized, the auxiliary air supply module stops supplying air to the drying air device and the load heat dissipation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0065] Figure 1 is a structural diagram of the auxiliary door opening module in an embodiment of the present invention;

[0066] Figure 2 is another structural diagram of the auxiliary door opening module in an embodiment of the present invention;

[0067] Figure 3 It is another structural diagram of the auxiliary door opening module in the embodiment of the present invention;

[0068] Figure 4 It is another structural diagram of the auxiliary door opening module in the embodiment of the present invention;

[0069] Figure 5 It is the front view of the dryer in the embodiment of the present invention;

[0070] Figure 6 It is another front view of the dryer in the embodiment of the present invention;

[0071] Figure 7 It is the schematic diagram of the principle of the door body opening in the embodiment of the present invention;

[0072] Figure 8 It is the schematic structural diagram of the dryer in the embodiment of the present invention;

[0073] Figure 9 It is another schematic structural diagram of the dryer in the embodiment of the present invention;

[0074] Figure 10 It is another schematic structural diagram of the dryer in the embodiment of the present invention;

[0075] Figure 11 It is the structural diagram of the auxiliary air supply module in the embodiment of the present invention;

[0076] Figure 12 It is the energized state diagram of the solenoid valve during the control of the four modes of the auxiliary air supply module of the present invention

[0077] Figure 13 It is the hardware and software structural diagram of the auxiliary air supply module and the auxiliary door opening module in the embodiment of the present invention;

[0078] Figure 14 It is the information transfer diagram between the mobile phone software and the dryer through the WIFI module in the embodiment of the present invention;

[0079] Figure 15 It is the flow chart of the control algorithm of the auxiliary air supply module in the embodiment of the present invention;

[0080] Figure 16 It is the flow chart of the PID control algorithm of the auxiliary air supply module in the embodiment of the present invention.

[0081] In the following figures:

[0082] Clothes dryer 100; cabinet 1; drying air duct 11; front air duct 111; rear air duct 112; lower air duct 113; drying drum 12; air inlet 121; air outlet 122; clothes receiving cavity 125; motor 126; belt 127; evaporator 141; condenser 142; first water storage tank 15; second water storage tank 16; drain pump 17; first drain pipe 171; water container 18; water container tray 19; second drain pipe 191; auxiliary door opening module 4; power source 41; auxiliary door opening pressure reducing device 42; auxiliary door opening pressure regulating device 43; first solenoid valve 431; second solenoid valve 432; auxiliary door opening flow regulator 433; pressure channel 44; main pressure channel 441; auxiliary pressure channel 442; auxiliary door opening relay valve 45; pressure sensor 46; first air pressure sensor 471; second air pressure sensor 472; auxiliary door opening air circuit pressure control device 473; auxiliary door opening one-way air device 474; auxiliary door opening emergency exhaust device 475; auxiliary door opening standby air source device 476; auxiliary door opening filtering device 477; door body 5; door handle 51;

[0083] Pressure reducing device 61; speed regulating device 62; third solenoid valve 63; fourth solenoid valve 64; flow regulator 65; relay valve 66; first wind speed sensor 67; second wind speed sensor 68; air circuit pressure control device 69; one-way air device 70; emergency exhaust device 71; standby air source device 72; filtering device 73; reversing solenoid valve 74; fifth solenoid valve 75; drying air expanding device 76; heat dissipation air expanding device 77; third wind speed sensor 78. Detailed implementation manners

[0084] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0085] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without making creative efforts, the present application can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be understood as the content disclosed in the present application being insufficient.

[0086] Reference to "embodiment" in this application means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0087] The "connection", "connection", "coupling" and other similar words involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in this application means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" may mean: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally means that the associated objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0088] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this invention.

[0089] Referring to Figures 1 - 10 , the dryer 100 includes a cabinet 1, wherein the height direction of the cabinet 1 is from the bottom to the top of the cabinet 1.

[0090] Refer to Figures 5 - 6 and Figures 8 - 10 , the cabinet 1 forms the appearance of the dryer 100, and the cabinet 1 has an accommodation space for accommodating and fixing various components in the dryer 100 to ensure the structural stability of the dryer 100.

[0091] The cabinet 1 includes a feeding port (not shown), wherein the feeding port is provided on the front side of the cabinet 1.

[0092] The dryer further includes a drying cylinder 12, and the drying cylinder 12 is arranged in the cabinet 1, wherein the drying cylinder 12 is rotatably arranged in the cabinet 1.

[0093] Specifically, the cabinet includes a placement space provided in the cabinet, wherein the drying cylinder is arranged in the placement space.

[0094] The drying cylinder includes a drying port (not shown) provided at the side end of the drying cylinder, wherein the drying port is provided on the side of the drying cylinder close to the feeding port, and the drying port is arranged opposite to the feeding port.

[0095] A clothing receiving cavity is formed inside the drying cylinder 12. Among them, the clothing receiving cavity communicates with the drying opening, and clothes can be placed in the clothing receiving cavity through the feeding opening and the drying opening. The clothing receiving cavity is used to hold the clothes to be dried so as to dry the clothes to be dried in the clothing receiving cavity.

[0096] The dryer further includes a door body 5. Among them, the door body is connected to the box body, and the door body is used to open or close the feeding opening. The door body 5 is arranged on one side of the drying cylinder 12, and the clothes are put in or taken out by opening and closing the door body 5, so as to realize the taking and placing of the clothes in the clothing receiving cavity.

[0097] The dryer further includes a door lock. The door lock is connected to the box body. The door lock locks the door body to limit the opening of the feeding opening by the door body, or the door lock unlocks the door body to enable the door body to open the feeding opening.

[0098] At present, opening the door body of the dryer requires a certain amount of arm strength from the user. For special groups with poor arm strength, it is difficult to open the door body. And, since the magnitude of the pulling force needs to be estimated by the user, too small or too large will bring discomfort to the user, and the experience is not good for users who pursue a smooth experience. Or, the dryer often misjudges the user's intention to open the door, resulting in the door opening when it does not need to be opened.

[0099] Therefore, the dryer is further provided with an auxiliary door opening module 4. The auxiliary door opening module 4 is arranged inside the box body, and the auxiliary door opening module 4 is used to apply an air thrust to the door body to unlock the door body from the door lock.

[0100] Reference Figure 1 , the auxiliary door opening module 4 includes a power source 41. Among them, the power source is used to provide compressed air.

[0101] Reference Figure 1 , the auxiliary door opening module 4 further includes an auxiliary door opening pressure reducing device 42. Among them, the auxiliary door opening pressure reducing device 42 is used to reduce the pressure of the air flowing through the auxiliary door opening pressure reducing device. The air inlet of the auxiliary door opening pressure reducing device is communicated with the air outlet of the power source, so that the auxiliary door opening pressure reducing device can reduce the pressure of the air flowing out of the power source and output the decompressed air.

[0102] The auxiliary door opening module 4 further includes an auxiliary door opening pressure regulating device 43. The auxiliary door opening pressure regulating device 43 is used to regulate the air pressure. The air inlet of the auxiliary door opening pressure regulating device is communicated with the air outlet of the auxiliary door opening pressure reducing device, and the auxiliary door opening pressure regulating device outputs a pilot pressure.

[0103] Reference Figure 1 , the maximum pressure of the auxiliary door opening pressure regulating device is regulated by the auxiliary door opening pressure reducing device 42.

[0104] Reference Figure 1, the auxiliary door opening module 4 further includes a pressure passage 44 for transmitting air.

[0105] Reference Figure 1 , the auxiliary door opening module 4 further includes an auxiliary door opening relay valve 45. Among them, the air inlet of the auxiliary door opening relay valve 45 is communicated with the air outlet of the power source, and the air outlet of the auxiliary door opening relay valve 45 is communicated with the inlet of the pressure passage; the pilot port of the auxiliary door opening relay valve is connected to the auxiliary door opening pressure regulating device. The auxiliary door opening relay valve receives the pilot pressure output by the auxiliary door opening pressure regulating device, and the auxiliary door opening relay valve amplifies the flow according to the pilot pressure and outputs driving air into the pressure passage, and the pressure of the driving air is the same as the pilot pressure.

[0106] When the door body is locked with the door lock, the outlet of the pressure passage faces the door body and applies a force to the door body through the driving air to unlock the door body from the door lock.

[0107] It is provided that the dryer includes an auxiliary door opening module. The auxiliary door opening module includes a power source, an auxiliary door opening pressure reducing device, an auxiliary door opening pressure regulating device, an auxiliary door opening relay valve and a pressure passage, which can generate air with a certain pressure to apply a force to the door body, so that the door body can be opened. The auxiliary door opening module can play the role of assisting in opening the door, solve the problem that it is difficult for the user to open the door body due to insufficient arm strength, and the problem of unsmooth door opening caused by the user's inaccurate estimation of the opening pulling force. The air transmission has high smoothness, uniform and smooth output force, can extend the service life of the door lock, and can bring a smooth door opening experience to the user.

[0108] In some embodiments of the present application, the power source can be a pump body, and among them, the power source can be a small pump.

[0109] In some embodiments of the present application, the auxiliary door opening pressure reducing device is a pressure reducing valve.

[0110] In some embodiments of the present application, reference Figures 5 - 6 , the auxiliary switch module further includes a pressure sensor 46. The pressure sensor 46 is arranged on the box body and is used to detect the interaction force F0 between the door body and the box body.

[0111] The auxiliary switch module further includes a first air pressure sensor 471 and a second air pressure sensor 472.

[0112] Among them, the first air pressure sensor is used to detect the pressure value of the air between the pilot port of the auxiliary door opening relay valve and the auxiliary door opening pressure regulating device, and record the pressure value detected by the first air pressure sensor as the pilot pressure.

[0113] Among them, the second air pressure sensor 472 is used to detect the pressure value of the air between the air outlet of the auxiliary door opening relay valve and the pressure passage, and record the pressure value detected by the second air pressure sensor 472 as the output pressure.

[0114] Specifically, the flow path between the pilot port of the auxiliary door-opening relay valve and the auxiliary door-opening pressure regulating device is the pilot flow path; the flow path between the air outlet of the auxiliary door-opening relay valve and the pressure channel is the output flow path.

[0115] Wherein, the first air pressure sensor is used to detect the air pressure value in the pilot flow path; the second air pressure sensor is used to detect the air pressure value in the output flow path.

[0116] The clothes dryer further includes a controller (not shown), and the controller is configured to:

[0117] Monitor the interaction force F0 between the door body and the box body;

[0118] When the interaction force F0 decreases and the interaction force F0 is less than the first preset interaction force, control the auxiliary door-opening pressure regulating device to increase the pressure to increase the pilot pressure or control the auxiliary door-opening pressure regulating device to maintain the pressure to keep the pilot pressure unchanged. The auxiliary door-opening relay valve conveys air to the pressure channel to reduce the interaction force. When the interaction force decreases to 0, the door body and the door lock are unlocked.

[0119] By setting to monitor the interaction force F0 between the door body and the box body and when the interaction force F0 decreases and the interaction force F0 is less than the first preset interaction force, controlling the auxiliary door-opening pressure regulating device to increase the pressure or maintain the pressure, the auxiliary door-opening relay valve can generate air with a certain pressure to apply force to the door body, so that the door body opens; and by monitoring the interaction force F0 between the door body and the box body in this way to identify whether the user has an intention to open the door, and when the interaction force F0 decreases, it proves that the user has indeed made some actions on the door body, and when the interaction force F0 is less than the first preset interaction force, it proves that the user indeed has an intention to open the door. Therefore, when the interaction force F0 decreases and the interaction force F0 is less than the first preset interaction force, increasing the pressure or maintaining the pressure and the auxiliary door-opening relay valve outputting air can avoid misjudging the user's intention to open the door and causing the door to open when it does not need to be opened, so as to improve the accuracy of judging the intention to open the door and improve the user experience.

[0120] It should be noted that the controller refers to a device that can generate operation control signals according to the instruction operation code and timing signals, and instruct the dryer 100 to execute control instructions. Exemplarily, the controller can be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a programmable logic device (PLD), a microprocessor, a microcontroller, or any combination thereof. The controller can also be other devices with processing functions, such as circuits, devices, or software modules, and the embodiments of the present application do not impose any restrictions thereon.

[0121] In some embodiments of the present application, the controller is configured to:

[0122] When the interaction force F0 decreases and the interaction force F0 is less than the first preset interaction force, obtain the current pilot pressure of the air in the pilot flow path, and determine whether the current pilot pressure reaches the first pilot pressure P1. When the current pilot pressure does not reach the first pilot pressure P1, control the auxiliary door opening pressure regulating device to increase the pressure to increase the pilot pressure. When the current pilot pressure reaches the first pilot pressure P1, control the auxiliary door opening pressure regulating device to maintain the pressure to keep the pilot pressure unchanged.

[0123] In some embodiments of the present application, the controller is configured to:

[0124] When the current pilot pressure does not reach the first pilot pressure P1, control the auxiliary door opening pressure regulating device to increase the pressure to increase the pilot pressure of the air in the pilot flow path, and stop increasing when the pilot pressure increases to the target pilot pressure P0.

[0125] The thrust required for the door body to open is F2, and the corresponding target pilot pressure is P0.

[0126] In some embodiments of the present application, when the interaction force decreases to 0, the auxiliary door opening pressure regulating device reduces the pressure, and the auxiliary door opening module no longer generates a thrust on the door body.

[0127] In some embodiments of the present application, referring to Figure 2 , the auxiliary door opening pressure regulating device includes a first solenoid valve 431 and a second solenoid valve 432.

[0128] The inlet of the first solenoid valve 431 is connected to the outlet of the pressure reducing valve.

[0129] The inlet of the second solenoid valve 432 is connected to the outlet of the first solenoid valve and the pilot port of the auxiliary door opening relay valve.

[0130] When the auxiliary door-opening pressure regulating device is pressurized, the first solenoid valve and the second solenoid valve are energized.

[0131] When the auxiliary door-opening pressure regulating device is maintaining pressure, the first solenoid valve is de-energized and the second solenoid valve is energized.

[0132] When the auxiliary door-opening pressure regulating device is depressurized, the first solenoid valve and the second solenoid valve are de-energized.

[0133] Among them, the states shown in the drawings are those where the first solenoid valve and the second solenoid valve are de-energized.

[0134] By energizing and de-energizing the first solenoid valve, the connection and disconnection of the first solenoid valve are controlled. By energizing, de-energizing, and de-energizing the second solenoid valve, the disconnection and connection of the second solenoid valve are controlled.

[0135] Among them, when the first solenoid valve is energized, the first solenoid valve is connected. When the first solenoid valve is de-energized, the first solenoid valve is disconnected. When the second solenoid valve is de-energized, the second solenoid valve is connected. When the second solenoid valve is energized, the second solenoid valve is disconnected.

[0136] The outlet of the second solenoid valve is connected to other devices or is open.

[0137] The first solenoid valve and the second solenoid valve are two-way three-way solenoid valves.

[0138] In some embodiments of the present application, referring to Figure 2 , the auxiliary door-opening pressure regulating device further includes an auxiliary door-opening flow regulator 433. Among them, the inlet of the auxiliary door-opening flow regulator is connected to the auxiliary door-opening pressure reducing device, and the auxiliary door-opening flow regulator 433 is used to control the flow rate of the flow path between the auxiliary door-opening pressure regulating device and the pilot port of the auxiliary door-opening relay valve. Since the auxiliary door-opening relay valve has the function of amplifying the flow rate, therefore, the regulation of the flow path between the auxiliary door-opening pressure regulating device and the pilot port of the auxiliary door-opening relay valve is for the regulation of the flow rate output by the auxiliary door-opening relay valve.

[0139] Among them, the auxiliary door-opening flow regulator 433 can be a throttle valve.

[0140] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the auxiliary door-opening module further includes an auxiliary door-opening gas path pressure control device 473. The inlet of the auxiliary door-opening gas path pressure control device 473 is connected to the air outlet of the power source. The auxiliary door-opening gas path pressure control device 473 is used to control the air pressure of the flow path between the air outlet of the power source and the auxiliary door-opening pressure reducing device to be lower than its overflow air pressure.

[0141] The auxiliary door-opening gas path pressure control device 473 is an overflow valve. Among them, the inlet of the overflow valve is connected to the air outlet of the power source, and the outlet of the overflow valve is connected to other devices or is open.

[0142] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the auxiliary door opening module further includes an auxiliary door opening one-way air device 474. The auxiliary door opening one-way air device 474 is used to prevent air backflow. The inlet of the auxiliary door opening one-way air device 474 is connected to the air outlet of the power source, and the outlet of the auxiliary door opening one-way air device 474 is connected to the auxiliary door opening pressure reducing device.

[0143] Among them, the auxiliary door opening one-way air device 474 is a one-way valve.

[0144] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the auxiliary door opening module further includes an auxiliary door opening emergency exhaust device 475. The auxiliary door opening emergency exhaust device 475 is used to cut off the air flow path between the power source and the auxiliary door opening pressure reducing device and the auxiliary door opening relay valve.

[0145] In the case where the air path fails and continuously pushes the door body, the auxiliary door opening emergency exhaust device 475 can be used to cut off the air path and at the same time evacuate the air on the side of the auxiliary door opening emergency exhaust device 475 far from the power source.

[0146] Among them, the auxiliary door opening emergency exhaust device 475 can be a stop valve.

[0147] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the auxiliary door opening module further includes an auxiliary door opening filtering device 477. The filtering device is connected to the air inlet of the auxiliary door opening pressure regulating device and the side of the air inlet of the auxiliary door opening relay valve close to the power source. The auxiliary door opening filtering device is used to filter impurities in the air by the filter to ensure the purity of the gas.

[0148] Among them, the auxiliary door opening filtering device can be a filter.

[0149] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the auxiliary door opening module further includes an auxiliary door opening standby gas source device 476. When the power source fails, the auxiliary door opening standby gas source device can replace the power source pump for a period of time, improving the sustainable use ability of the device and making up for the window period before after-sales service arrives.

[0150] The auxiliary door opening standby gas source device 476 can be a gas storage tank with a certain volume.

[0151] In some embodiments of the present application, the pressure channel can be one-way. The inlet of the pressure barrel is connected to the air outlet of the auxiliary door opening relay valve, and the outlet of the pressure channel faces the door body when the door body closes the discharge port.

[0152] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the pressure passage includes a main pressure passage 441, and the inlet of the main pressure passage 441 is connected to the air outlet of the auxiliary door-opening relay valve.

[0153] The pressure passage further includes at least two auxiliary pressure passages 442. One ends of the two auxiliary pressure passages are simultaneously connected to the outlet of the main pressure passage, and the outlets of the two auxiliary pressure passages respectively correspond to different positions of the door body.

[0154] In some embodiments of the present application, referring to Figure 5 and Figure 6 , the door body includes a door handle 51. A pressure sensor is provided on one side of the door handle of the door body. When the door body closes the feeding port, the position corresponding to the door body of the pressure passage outlet is on one side of the door handle.

[0155] In some embodiments of the present application, the number of pressure sensors is the same as the number of auxiliary pressure passages. Among them, the pressure sensors and the auxiliary pressure passages are in one-to-one correspondence. That is, the pressure sensors are provided on one side of the outlets of the auxiliary pressure passages, and the distance between each pressure sensor and the outlet of its corresponding auxiliary pressure passage is equal or the difference between adjacent distances is within a certain range, ensuring the stability of the values detected by the pressure sensors.

[0156] Among them, the interaction force is the interaction force corresponding to the average value of the values detected by the pressure sensors.

[0157] In some embodiments of the present application, the box body includes a feeding port provided on the front side of the box body; the door body is connected to the box body and is used to open or close the feeding port; the door lock connects the box body, and the door lock locks the door body to limit the door body from opening the feeding port or the door lock unlocks from the door body to enable the door body to open the feeding port; the auxiliary door-opening module is provided inside the box body, and the auxiliary door-opening module is used to apply an air thrust to the door body to unlock the door body from the door lock.

[0158] The auxiliary door-opening module includes a power source, an auxiliary door-opening pressure-reducing device, an auxiliary door-opening pressure-regulating device, a pressure passage, an auxiliary door-opening relay valve, a pressure sensor, a first air pressure sensor, and a second air pressure sensor; the power source is used to provide compressed air; the auxiliary door-opening pressure-reducing device is used to reduce the pressure of the air flowing through the auxiliary door-opening pressure-reducing device, and the air inlet of the auxiliary door-opening pressure-reducing device is communicated with the air outlet of the power source; the auxiliary door-opening pressure-regulating device is used to regulate the air pressure, the air inlet of the auxiliary door-opening pressure-regulating device is communicated with the air outlet of the auxiliary door-opening pressure-reducing device, and the auxiliary door-opening pressure-regulating device outputs a pilot pressure; the pressure passage is used to transmit air;

[0159] The air inlet of the auxiliary door-opening relay valve is communicated with the air outlet of the power source, and its air outlet is communicated with the inlet of the pressure channel; the pilot port of the auxiliary door-opening relay valve is connected to the auxiliary door-opening pressure regulating device.

[0160] The pressure sensor is arranged on the box body to detect the interaction force F0 between the door body and the box body;

[0161] The first air pressure sensor is used to detect the pressure value of the air between the pilot port of the auxiliary door-opening relay valve and the auxiliary door-opening pressure regulating device, and records the detected pressure value as the pilot pressure;

[0162] The second air pressure sensor is used to detect the pressure value of the air between the air outlet of the auxiliary door-opening relay valve and the pressure channel, and records the detected pressure value as the output pressure;

[0163] The controller is configured to:

[0164] Monitor the interaction force F0 between the door body and the box body;

[0165] When the interaction force F0 decreases and the interaction force F0 is less than the first preset interaction force, control the auxiliary door-opening pressure regulating device to increase or maintain the pressure, and the auxiliary door-opening relay valve conveys air to the pressure channel to reduce the interaction force.

[0166] By setting to monitor the interaction force F0 between the door body and the box body, and when the interaction force F0 decreases and the interaction force F0 is less than the first preset interaction force, controlling the auxiliary door-opening pressure regulating device to increase or maintain the pressure, the auxiliary door-opening relay valve can generate air with a certain pressure to apply force to the door body to open the door body; and by monitoring the interaction force F0 between the door body and the box body in this way to identify whether the user has the intention to open the door, and when the interaction force F0 decreases, it proves that the user has indeed made some actions on the door body, and when the interaction force F0 is less than the first preset interaction force, it proves that the user indeed has the intention to open the door. Therefore, when the interaction force F0 decreases and the interaction force F0 is less than the first preset interaction force, increasing or maintaining the pressure and the auxiliary door-opening relay valve outputting air can avoid misjudging the user's intention to open the door and causing the door to open when it does not need to be opened, so as to improve the accuracy of judging the intention to open the door and improve the user experience.

[0167] In some embodiments of the present application, the air outlet of the power source is connected to the air inlet of the auxiliary door-opening air path pressure control device and the air inlet of the auxiliary door-opening one-way air device, the air outlet of the auxiliary door-opening one-way air device is connected to the air inlet of the air storage device, the air outlet of the air storage device is connected to the air inlet of the auxiliary door-opening emergency exhaust device, the air outlet of the auxiliary door-opening emergency exhaust device is connected to the air inlet of the auxiliary door-opening filtering device, and the air outlet of the auxiliary door-opening filtering device is connected to the air inlet of the auxiliary door-opening pressure reducing device and the air inlet of the auxiliary door-opening relay valve.

[0168] The power source compresses air into the main air circuit, and the air pressure in the main air circuit is set by the auxiliary door-opening air circuit pressure control device. The air in the main air circuit is divided into two paths after passing through the auxiliary door-opening filtering device and flows into the auxiliary door-opening pressure reducing device and the auxiliary door-opening relay valve respectively. The set pressure P2 of the auxiliary door-opening pressure reducing device is used as the air duct pressure of the auxiliary door-opening pressure regulating device, and the pilot pressure is output to the pilot port of the auxiliary door-opening relay valve through the auxiliary door-opening pressure regulating device to control the output air pressure of the auxiliary door-opening relay valve to be consistent with the pilot pressure.

[0169] In some embodiments of the present application, after the auxiliary door-opening pressure regulating device enters the pressurization state, when the air pressure value detected by the first air pressure sensor is quite different from the air pressure value detected by the second air pressure device, it is prompted that the auxiliary door-opening relay valve is damaged and needs to be replaced or repaired in time.

[0170] In some embodiments of the present application, if the user continuously applies force during the entire door-opening process and the interaction force F0 is detected to be 0 during the pressurization process, it indicates that the door has been opened.

[0171] If the user does not want to continuously apply force and just tells the dryer the intention to open the door, the user can briefly apply force and then release it, and wait for the auxiliary door-opening module to work to open the door body.

[0172] In some embodiments of the present application, the dryer 100 may further include: a display, which may be a liquid crystal display or an organic light-emitting diode display. The specific type, size, and resolution of the display are not limited. Those skilled in the art can understand that the display can be changed in terms of performance and configuration according to needs.

[0173] The display can be used to display the control panel of the dryer 100 or the operation information of the dryer 100. The dryer displays the operation information such as the running duration of the dryer and the drying program being run through the display.

[0174] Among them, whether to open the door body of the dryer can be operated through the control panel. When it is necessary to open, the controller controls the power source to work, the auxiliary door-opening pressure regulating device pressurizes or maintains pressure, and the auxiliary door-opening relay valve outputs air with the pilot pressure and acts on the door body to open the door body.

[0175] In some embodiments of the present application, the dryer may further include: a voice prompt device, which is used to play voice prompt information according to the program. Among them, the content of the voice prompt information can be preset by the manufacturer of the dryer 100 or set by the user through the human-machine interaction device. Exemplarily, when the controller obtains that the clothes have met the drying end condition (when the dryer runs to the stop time), the controller can control the voice prompt device to play prompt information such as "drying completed".

[0176] The dryer may further include: a human-machine interaction device for realizing the interaction between the user and the dryer. The human-machine interaction device may include one or more of physical buttons or a touch display panel. For example, the user can set the drying program that the dryer needs to run through the human-machine interaction device.

[0177] Among them, it is possible to indicate to the dryer whether to open the door through human-machine interaction. When the door needs to be opened, the auxiliary door opening module works.

[0178] In some embodiments of the present application, when the difference between the pilot pressure detected by the first air pressure sensor and the output pressure detected by the second air pressure sensor is greater than a preset difference, the controller prompts that the relay valve is damaged and the relay valve needs to be replaced or repaired in time.

[0179] In some embodiments of the present application, when the interaction force F0 is equal to 0, it indicates that the door body is opened at this time, or when the change range of F0 is less than or equal to F 定 it indicates that the pulling force does not meet the requirements at this time, which means that the auxiliary door opening module is not required to open the door. At this time, the door opening device needs to be cleared to 0, that is, when the door state flag is equal to 0, it means that the door does not need to be opened at this time.

[0180] When the change range of F0 is greater than F 定 at this time, it represents that the auxiliary door opening module needs to be controlled to open the door, and at this time, the door opening device needs to be set to 1.

[0181] When the door does not need to be opened, the auxiliary door opening module is in a pressure reducing state. When the door needs to be opened, PID control is started to control the output force to meet the preset interaction force F2.

[0182] In some embodiments, since the dryer needs to blow hot air into the drying cylinder to dry the clothes, and at the same time, there are heat generating loads such as motors and compressors in the dryer that need to be cooled. Therefore, the dryer is further provided with an auxiliary air supply module. The auxiliary air supply module is arranged in the box body and is used for supplying air to the drying cylinder and / or supplying air to the heat generating load.

[0183] See Figures 11 - 12 , the auxiliary air supply module includes a power source 41. Among them, the power source 41 is used to provide compressed air. The power source 41 of the auxiliary air supply module and the power source 41 of the auxiliary door opening module can share the same power source, and the compressed air is respectively transported to the auxiliary door opening module and the auxiliary air supply module through two flow paths flowing out of the power source 41.

[0184] The auxiliary air supply module further includes a pressure reducing device 61. Among them, the pressure reducing device 61 is used to reduce the pressure of the air flowing through the pressure reducing device 61. The air inlet of the pressure reducing device 61 is communicated with one of the air outlets of the power source, so that the pressure reducing device 61 can reduce the pressure of the air flowing out of the power source and output the decompressed air.

[0185] The auxiliary air supply module further includes a speed regulating device 62 for regulating the air flow rate. The air inlet of the speed regulating device 62 is communicated with the air outlet of the pressure reducing device 61, and the speed regulating device 62 outputs a pre-controlled flow rate. The maximum pressure flowing to the speed regulating device 62 is regulated by the pressure reducing device 61.

[0186] The auxiliary air supply module further includes: a drying air device and a load heat dissipation device. The drying air device is used to send the air transmitted to the drying air device into the drying cylinder. The load heat dissipation device is used to send the air transmitted to the load heat dissipation device to flow through the heat generating load. The load heat dissipation device includes a heat dissipation air diffusing device 77, and the heat dissipation air diffusing device 77 is in the shape of a flared trumpet for diffusing air. The lateral area of the heat dissipation air supply is enlarged through the heat dissipation air diffusing device 77, and this air can dissipate heat for heat generating loads such as motors and compressors.

[0187] The auxiliary air supply module further includes: a reversing solenoid valve 74. When the reversing solenoid valve 74 is energized, it communicates with the load heat dissipation device and disconnects from the drying air device; when the reversing solenoid valve 74 is de-energized, it communicates with the drying air device and disconnects from the load heat dissipation device.

[0188] The auxiliary air supply module further includes a relay valve 66. The air inlet of the relay valve 66 is communicated with the air outlet of the power source, and the air outlet of the relay valve 66 is communicated with the inlet of the reversing solenoid valve 74. The pilot port of the relay valve 66 is connected to the speed regulating device 62. The relay valve 66 receives the pre-controlled flow rate output by the speed regulating device 62, amplifies the flow rate according to the pre-controlled flow rate, and outputs driving air to the reversing solenoid valve 74.

[0189] By adjusting the pre-controlled flow rate output by the speed regulating device 62, the air flow rate output from the speed regulating device 62 to the drying air device or the load heat dissipation device is controlled.

[0190] In the related art, a motor is usually used to drive the fan blade to rotate to push the air flow into the drying cylinder, thereby realizing drying of clothes. However, this method binds the motor speed and the fan blade speed together, and it is impossible to achieve a more reasonable and free control of the drying air flow speed. At the same time, there are heat generating loads such as motors and compressors in the dryer. In the related art, a cooling fan is provided to dissipate heat from the heat generating load. The cooling fan requires a circuit board to provide an interface for separate control, and the air flow speed is fixed, and the cost is relatively high. The cooling fan cannot adjust the air flow speed of the heat dissipation air according to the load temperature.

[0191] In this application, the power source supplies air to the drying air device and the load heat dissipation device to realize the drying and load heat dissipation functions, saving the cooling fan and cost; in this application, the pre-controlled flow rate output by the speed regulating device 62 can be adjusted to independently control and adjust the output air flow speed, reducing the motor load while making the air flow speed flowing into the drying cylinder more reasonably adjustable.

[0192] In some embodiments of the present application, the power source may be a pump body, and among them, the power source may be a small pump.

[0193] In some embodiments of the present application, the pressure reducing device 61 is a pressure reducing valve.

[0194] The auxiliary switch module further includes a first wind speed sensor 67 and a second wind speed sensor 68.

[0195] Among them, the first wind speed sensor 67 is used to detect the air flow velocity between the commutation solenoid valve 74 and the load heat dissipation device and record the detected flow velocity as the first flow velocity.

[0196] Among them, the second wind speed sensor 68 is used to detect the air flow velocity between the air outlet of the relay valve 66 and the drying air device and record the detected flow velocity as the second flow velocity.

[0197] The dryer further includes a controller, and the controller is configured to:

[0198] Adjust the size of the pre-control flow output by the speed regulating device 62 according to the difference between the detected first flow velocity and the preset wind speed value or the difference between the second flow velocity and the preset wind speed value. By adjusting the pre-control flow output by the speed regulating device 62, the air flow velocity output to the drying air device or the load heat dissipation device reaches the preset wind speed value, so that the air flow velocity output to the drying air device or the load heat dissipation device maintains a preset constant state.

[0199] In some embodiments of the present application, the auxiliary air supply speed regulating device 62 includes a third solenoid valve 63 and a fourth solenoid valve 64.

[0200] The inlet of the third solenoid valve 63 is connected to the outlet of the pressure reducing valve.

[0201] The inlet of the fourth solenoid valve 64 is connected to the outlet of the third solenoid valve and the pilot port of the relay valve 66.

[0202] When the wind speed flowing from the relay valve 66 to the commutation solenoid valve 74 is in the incoming air state, the relay valve 66 increases the air flow velocity delivered to the drying air device or the load heat dissipation device. At this time, the third solenoid valve 63 and the fourth solenoid valve 64 are powered off.

[0203] When the wind speed flowing from the relay valve 66 to the commutation solenoid valve 74 is in the constant wind state, the relay valve 66 delivers air to the drying air device or the load heat dissipation device at a constant speed. At this time, the third solenoid valve 63 is powered off and the fourth solenoid valve 64 is powered on.

[0204] When the wind speed flowing from the relay valve 66 to the commutation solenoid valve 74 is in the no-wind state, the relay valve 66 does not deliver air to the drying air device or the load heat dissipation device. At this time, the third solenoid valve 63 and the fourth solenoid valve 64 are powered on.

[0205] The connection and disconnection of the third solenoid valve 63 are controlled by energizing and de-energizing the third solenoid valve 63, and the disconnection and connection of the fourth solenoid valve 64 are controlled by turning on and off and de-energizing the fourth solenoid valve 64.

[0206] The outlet of the fourth solenoid valve 64 is connected to other devices or is open.

[0207] The third solenoid valve 63 and the fourth solenoid valve 64 are two-position three-way solenoid valves.

[0208] In some embodiments of the present application, the speed regulating device 62 further includes a flow regulator 65. The inlet of the flow regulator 65 is connected to the pressure reducing device 61, and the flow regulator 65 is used to control the flow rate of the flow path between the speed regulating device 62 and the pilot port of the relay valve 66. Since the relay valve 66 has the function of amplifying the flow rate, the regulation of the flow path between the speed regulating device 62 and the pilot port of the relay valve 66 is for the regulation of the flow rate output by the relay valve 66.

[0209] Among them, the flow regulator 65433 can be a throttle valve.

[0210] In some embodiments of the present application, the auxiliary air supply module further includes a gas path pressure control device 69. The inlet of the gas path pressure control device 69 is connected to an air outlet of the power source, and the gas path pressure control device 69 is used to control the air pressure of the flow path between the air outlet of the power source and the pressure reducing device 61 to be lower than its overflow air pressure.

[0211] The gas path pressure control device 69 is an overflow valve. Among them, the inlet of the overflow valve is connected to the air outlet of the power source, and the outlet of the overflow valve is connected to other devices or is open.

[0212] In some embodiments of the present application, the auxiliary air supply module further includes a one-way air device 70. The one-way air device 70 is used to prevent air backflow. The inlet of the one-way air device 70 is connected to the air outlet of the power source, and the outlet of the one-way air device 70 is connected to the pressure reducing device 61.

[0213] Among them, the one-way air device 70 is a one-way valve.

[0214] In some embodiments of the present application, the auxiliary air supply module further includes an emergency exhaust device 71. The emergency exhaust device 71 is used to cut off the air flow path between the power source, the pressure reducing device 61, and the relay valve 66.

[0215] In the case where a malfunction occurs in the air path and continuous air flows to the drying air device or the load heat dissipation device, the emergency exhaust device 71 can be used to cut off the air path and at the same time evacuate the air on the side of the emergency exhaust device 71 far from the power source.

[0216] Among them, the emergency exhaust device 71 can be a stop valve.

[0217] In some embodiments of the present application, the auxiliary air supply module further includes a filtering device 73, and the filtering device 73 is connected to the air inlet of the speed control device 62 and the air inlet of the relay valve 66 on the side close to the power source. The filtering device 73 is used to filter impurities in the air to ensure the purity of the gas.

[0218] Among them, the filtering device 73 can be a filter.

[0219] In some embodiments of the present application, the auxiliary air supply module further includes a standby gas source device 72. When the power source fails, the standby gas source device can replace the power source pump for a period of time, improving the durability of the device and making up for the blank period before after-sales service arrives.

[0220] The standby gas source device 72 can be a gas storage tank with a certain volume.

[0221] The power source compresses air into the main air circuit, and the air pressure in the main air circuit is set by the air circuit pressure control device 69. The air in the main air circuit is divided into two paths after passing through the filtering device 73 and flows into the pressure reducing device 61 and the relay valve 66 respectively. The set pressure P4 of the pressure reducing device 61 serves as the air duct pressure of the speed control device 62, and a pre-control flow rate is output to the pilot port of the relay valve 66 through the speed control device 62. The relay valve 66 receives the pre-control flow rate output by the speed control device 62, and the relay valve 66 amplifies the flow rate according to the pre-control flow rate and outputs driving air to the reversing solenoid valve 74.

[0222] In some embodiments, the auxiliary air supply module further includes a fifth solenoid valve 75, and the fifth solenoid valve 75 can be used to connect the load heat dissipation device and the drying air device.

[0223] When the fifth solenoid valve 75 is energized, the load heat dissipation device is connected to the drying air device. When the fifth solenoid valve 75 is de-energized, the load heat dissipation device is not connected to the drying air device.

[0224] By energizing and de-energizing the fifth solenoid valve 75, simultaneous air supply and simultaneous non-air supply of the load heat dissipation device and the drying air device can be achieved.

[0225] In the related art, a motor is usually used to drive the fan blade to rotate to push the air flow into the drying cylinder, thereby drying the clothes. However, this method binds the motor speed and the fan blade speed together, and it is impossible to achieve a more reasonable and free control of the drying air flow speed.

[0226] At the same time, there are heating loads such as motors and compressors in the dryer. In the related art, a cooling fan is provided to dissipate heat from the heating load. The cooling fan requires a circuit board to provide an interface for separate control, and the wind speed is fixed, and the cost is relatively high. The cooling fan cannot adjust the wind speed of the cooling air flow according to the load temperature.

[0227] Reference Figures 8 - 10, To solve the above problems, in some embodiments of the present application, an air inlet 121 and an air outlet 122 are provided on the drying cylinder 12. Both the air inlet 121 and the air outlet 122 are in communication with the clothing accommodation cavity. During the drying process, the dryer 100 generates a drying air flow. The drying air flow enters the clothing accommodation cavity from the air inlet 121, takes away the moisture on the clothes, and is discharged from the air outlet 122. Refer to Figure 1 , In this embodiment, the air inlet 121 and the air outlet 122 are respectively arranged on the left and right sides of the drying cylinder 12, and the rotation of the drying cylinder 12 is realized by a transmission mechanism composed of a motor and a belt.

[0228] Refer to Figures 8 - 10 , A wind duct plate is arranged in the cabinet 1. A drying air duct 11 is formed between the wind duct plates. The drying air duct 11 is arranged between the cabinet 1 and the drying cylinder 12. Both ends of the drying air duct 11 are respectively connected and communicated with the air inlet 121 and the air outlet 122 of the drying cylinder 12 to form a loop channel. A drying air device is connected in the drying air duct 11. The drying air device is used to make the air in the drying air duct 11 flow in the direction from the air outlet 122 to the air inlet 121, so that the air in the clothing accommodation cavity enters the drying air duct 11 through the air outlet 122, and the air in the drying air duct 11 enters the clothing accommodation cavity through the air inlet 121, so as to realize the air circulation between the clothing accommodation cavity and the drying air duct 11. In this embodiment, the drying air device includes a drying air expanding device 76. The drying air expanding device 76 is arranged in a horn flare shape. The lateral area of the air can be enlarged through the drying air expanding device 76, and the drying air volume can be increased..

[0229] In this embodiment, refer to Figures 8 - 10 , the drying air duct 11 includes a front air duct 111 communicated with one side of the drying cylinder 12, a rear air duct 112 communicated with the other side of the drying cylinder 12, and a lower air duct 113. The front air duct 111 and the rear air duct 112 are communicated through the lower air duct 113. The drying air duct 11 is in communication with the clothing accommodation cavity to form a loop channel. Refer to Figures 8 - 10 , wherein, the arrow direction is the air circulation direction in the loop channel.

[0230] Refer to Figures 8 - 10 , a drying device is arranged in the drying air duct 11. The drying device is used to heat the dried air flow after condensation. The heated drying air flow is introduced into the clothing accommodation cavity from the air inlet 121. The drying device is also used to condense the high-temperature and high-humidity air flow discharged from the air outlet 122, so as to condense the moisture carried in the high-temperature and high-humidity air flow to form condensed water. In this way, the moisture of the clothes in the clothing accommodation cavity is taken away by the drying air flow, so that the moisture on the clothes is separated from the clothes, so as to realize the drying of the clothes.

[0231] Specifically, refer to Figures 8 - 10, in this embodiment, the drying device is disposed in the lower air duct 113, and the drying device includes a condenser 142 and an evaporator 141. The compressor is used to compress the refrigerant so that the refrigerant flows into the condenser and the evaporator. The condenser 142 is located on the side of the evaporator 141 close to the upper air inlet 121 of the drying cylinder 12. The condenser 142 is used to heat the air in the drying air duct 11 to form a high-temperature and dry drying air flow. After passing through the drying air duct 11, the drying air flow enters the drying cylinder 12, and then evaporates the moisture of the clothes to be dried in the drying cylinder 12 to form a high-temperature and high-humidity air flow. The high-temperature and high-humidity air flow led out from the drying cylinder 12 contains a large amount of water vapor. After passing through the front air duct 111, it contacts the evaporator 141 with a low surface temperature in the lower air duct 113 to precipitate condensed water and become a low-temperature and low-humidity air flow. The low-temperature and low-humidity air flow is further heated by the condenser 142 to form a high-temperature and dry drying air flow.

[0232] Since the compressor and the motor will generate heat during long-term operation, therefore, the load heat dissipation device sends the air transmitted to the load heat dissipation device to flow through the heat-generating loads such as the compressor and the motor, which can improve the heat dissipation effect of the compressor and the motor.

[0233] Reference Figures 8 - 10 , the dryer 100 further includes a water storage tank for collecting the condensed water formed on the evaporator 141. In this embodiment, the water storage tank includes a first water storage tank 15 and a second water storage tank 16. The first water storage tank 15 is disposed in the lower air duct 113 and below the drying device. The second water storage tank 16 is disposed outside the drying air duct 11 and communicated with the first water storage tank 15, so that the condensed water collected in the first water storage tank 15 enters the second water storage tank 16. By dividing the water storage tank into two and respectively located inside and outside the drying air duct 11, the volume of the water storage tank can be effectively increased, and thus the capacity of the water storage tank can be increased.

[0234] Reference Figures 8 - 10 , in order to drain the condensed water in the water storage tank, a drain pump 17 is disposed in the second water storage tank 16. The drain pump 17 is used to pump the water in the second water storage tank 16 into the water container 18 or outside the box body 1.

[0235] Reference Figures 8 - 10 , a water container 18 is provided at the top of the box body 1. An inlet is provided at the top of the water container 18. The inlet is communicated with the drain pump 17 through a first drain pipe 171. In this embodiment, the first drain pipe 171 extends from the bottom of the box body 1 to the top of the box body 1. The first drain pipe 171 is communicated with the water container 18 through the inlet to realize draining the condensed water in the second water storage tank 16 into the water container 18.

[0236] Reference Figures 8 - 10, Further, a water container tray 19 is also provided at the top of the box body 1. A water container 18 is arranged inside the water container tray 19, and the water container tray 19 is communicated with the water storage tank. Specifically, a water outlet is provided at the bottom of the water container tray 19. The water outlet is arranged corresponding to the second water storage tank 16. The water outlet is communicated with the first water storage tank 15 through a second drain pipe 191. By providing the water outlet and the second drain pipe 191, the water container tray 19 is communicated with the second water storage tank 16. When the water volume in the water container is too much and overflows into the water container tray 19, it will flow into the second water storage tank 16 through the second drain pipe 191 to relieve the water overflow situation of the water container.

[0237] In this application, a power source is used to supply air to the drying air device and the load heat dissipation device to achieve the functions of drying and load heat dissipation, saving the heat dissipation fan and cost; this application can adjust the wind speed independently, reducing the motor load while making the wind speed flowing into the drying cylinder more reasonably adjustable.

[0238] See Figure 12 , In this embodiment, the working modes of the drying air device and the load heat dissipation device can be divided into four working states, and the control of the air flow rate is completed by the third solenoid valve 63 and the fourth solenoid valve 64.

[0239] The controller is configured to: when the controller controls the reversing solenoid valve 74 to be powered off, the fifth solenoid valve 75 to be powered off, the third solenoid valve 63 to be powered off, and the fourth solenoid valve 64 to be powered off, the auxiliary air supply module supplies air to the drying air device.

[0240] When the controller controls the reversing solenoid valve 74 to be powered on, the fifth solenoid valve 75 to be powered off, the third solenoid valve 63 to be powered off, and the fourth solenoid valve 64 to be powered off, the auxiliary air supply module supplies air to the load heat dissipation device.

[0241] When the controller controls the reversing solenoid valve 74 to be powered off or on, the fifth solenoid valve 75 to be powered on, the third solenoid valve 63 to be powered off, and the fourth solenoid valve 64 to be powered off, the auxiliary air supply module supplies air to the drying air device and the load heat dissipation device.

[0242] When the controller controls the reversing solenoid valve 74 to be powered off or on, the fifth solenoid valve 75 to be powered off or on, the third solenoid valve 63 to be powered on, and the fourth solenoid valve 64 to be powered on, the auxiliary air supply module stops supplying air to the drying air device and the load heat dissipation device.

[0243] Among them, when the wind speed of the relay valve 66 flowing to the reversing solenoid valve 74 is in the air inlet state, the relay valve 66 increases the wind speed of delivering air to the drying air device or the load heat dissipation device. At this time, the third solenoid valve 63 and the fourth solenoid valve 64 are powered off.

[0244] When the wind speed from the relay valve 66 to the reversing solenoid valve 74 is in the fixed-wind state, the relay valve 66 delivers air to the drying air device or the load heat dissipation device at a fixed speed. At this time, the third solenoid valve 63 is de-energized and the fourth solenoid valve 64 is energized. Since the wind speed is autonomously adjusted by the system at all times, the fixed-wind state will be a transient state and requires autonomous control adjustment.

[0245] When the wind speed from the relay valve 66 to the reversing solenoid valve 74 is in the no-wind state, the relay valve 66 does not deliver air to the drying air device or the load heat dissipation device. At this time, the third solenoid valve 63 and the fourth solenoid valve 64 are energized.

[0246] The present application can implement four working modes of the drying air device and the load heat dissipation device in the above manner.

[0247] In some embodiments, when the wind speeds of the drying air device and the load heat dissipation device need to be non-constant, three states of the air intake state, the fixed-wind state, and the no-wind state need to be combined. For example, it is always in the air intake state or an air intake-fixed wind-air intake-fixed wind cycle or an air intake-fixed wind-no wind-air intake-fixed wind-no wind cycle. At this time, the wind speed will be from high to low. It can be set that the magnitude of the wind speed is related to the duration ratio occupied by the air intake, the fixed wind, and the no wind, and stepless speed regulation of the wind speed can be achieved through the above control.

[0248] Refer to Figures 11 - 16 , in some embodiments of the present application, the controller is configured to: obtain the actual wind speed value S' through the first flow rate or the second flow rate.

[0249] Define the difference between the desired wind speed value S and the actual wind speed value S' as the error e. Obtain the output quantity u through PID control according to the error e.

[0250] Control the energized states of the third solenoid valve and the fourth solenoid valve according to the magnitude of the value of the output quantity u, and control the wind speed of the speed regulating device to deliver air to the drying air device and / or the load heat dissipation device through the energized states of the third solenoid valve and the fourth solenoid valve.

[0251] The present application calculates the error e from the first flow rate or the second flow rate with respect to the desired wind speed value S, and then outputs the accurate output quantity u through PID control. The magnitude of the value of the output quantity u is used to control the energization or de-energization of the third solenoid valve and the fourth solenoid valve, thereby realizing the control of the wind speed output by the relay valve. The PID control logic of the present application can calculate the output quantity u more accurately, so as to accurately control the movement of the third solenoid valve and the fourth solenoid valve, making the wind speed output by the relay valve to the drying air device and / or the heating load device more accurate.

[0252] When the relay valve operates normally, the speed regulating device 62 outputs a pre-control flow rate to the pilot port of the relay valve 66. The relay valve 66 receives the pre-control flow rate output by the speed regulating device 62, and the relay valve 66 amplifies the flow rate proportionally according to the pre-control flow rate and outputs the driving air after the amplified flow rate to the reversing solenoid valve 74.

[0253] The third wind speed sensor 78 is used to detect the wind speed output by the relay valve, and obtain the air flow rate in the corresponding pipeline according to the wind speed and the corresponding pipeline cross-sectional area.

[0254] Define the difference between the expected wind speed value S and the actual wind speed value S’ as the error e, and convert the analog signal into a digital signal through the analog-to-digital converter, that is, convert the error e into a digital signal recognizable by the controller.

[0255] PID control includes: the controller interrupts after a preset time interval. After the controller interrupts regularly, calculate the output u(k) at this time, and u(k) is the value of the output u calculated after the kth interruption.

[0256] Preset proportional term K p Integral term K i And derivative term K d Through the proportional term K p Perform an operation with the error e at the kth time to obtain the proportional parameter. Through the integral term K i Perform an operation with the sum of the errors e from the 1st to the kth time to obtain the integral parameter. Through the derivative term K d Perform an operation with the difference between the error at the kth time and the error at the (k - 1)th time to obtain the derivative parameter. Add the proportional parameter, integral parameter, and derivative parameter to obtain the value of the output u(k) at the kth time.

[0257] Among them, the proportional term K p Integral term K i And derivative term K d Is a constant, the proportional term K p Integral term K i And derivative term K d Is set to a fixed value, that is, when calculating the output u, the proportional term K p Integral term K i And derivative term K d Does not change with the change of the error e.

[0258] Proportional term K p Integral term K i And derivative term K d The values can be preset by the user in the controller.

[0259] In this embodiment, multiply the proportional term K p By the error e at the kth time to obtain the proportional parameter. Through the integral term Ki Multiply by the sum of the errors e from the 1st to the kth time to obtain the integral parameter. Through the differential term K d Multiply by the difference between the kth error and the (k - 1)th error to obtain the differential parameter.

[0260] In this embodiment, the formula of PID control is expressed as follows:

[0261] u(k) = K p err(k) + K i ∑err(k) + K d (err(k) - err(k - 1))

[0262] k represents the calculation result of the kth controller timing interruption, k ≥ 1, ∑err(k) represents the accumulated value of all errors e from the 1st to the kth time by the computer, err(k) represents the kth error, K p 、K i 、K d are constants.

[0263] In this embodiment, the controller is configured to: after a preset time interval, according to the error e, the proportional term K p 、the integral term K i and the differential term K d perform operations to obtain the value of the output u at the kth time.

[0264] In this embodiment, the preset time can be set to 1 ms, that is, every 1 ms the controller has a timing interruption and calculates the result of u(k).

[0265] When the output u is greater than 0, the third solenoid valve and the fourth solenoid valve are de-energized, and the wind speed at which the relay valve delivers air to the drying air device and / or the load heat dissipation device increases.

[0266] The output u has a maximum value u1 and a minimum value u2. It can be set that when u1 > u > 0, it represents that the auxiliary air supply module is in the air inlet state, and at this time the wind speed at which the relay valve delivers air to the drying air device and / or the load heat dissipation device increases. In the air inlet state, the wind speed at which the relay valve delivers air to the drying air device and / or the load heat dissipation device decreases from the increasing state to the constant wind state. As the value of u becomes larger and larger, the proportion of the increasing state is larger and the proportion of the constant wind state is smaller. That is, the larger the value of u, the larger the proportion of the increasing state and the smaller the proportion of the constant wind state. The proportion of the increasing state and the proportion of the constant wind state can be expressed as the duration of the wind speed increasing state and the duration of the constant wind state. When u = u1, the controller controls the auxiliary air supply module to always be in the air inlet state.

[0267] When the output u equals 0, the third solenoid valve is de-energized and the fourth solenoid valve is energized. At this time, the auxiliary air supply module is in the constant wind state, and the relay valve delivers air to the drying air device and / or the load heat dissipation device at a constant speed. It can be set that when the output u is approximately equal to 0, it is considered that the output u equals 0 at this time, and the approximate value can be determined by the user.

[0268] When the output u is less than 0, the third solenoid valve and the fourth solenoid valve are energized. At this time, the auxiliary air supply module is in the no-wind state, and the relay valve does not deliver air to the drying air device or the load heat dissipation device. In the no-wind state, the wind speed at which the relay valve delivers air to the drying air device and / or the load heat dissipation device increases from the no-wind state to the constant wind state. As the value of u becomes smaller and smaller, the proportion of the no-wind state is larger and the proportion of the constant wind state is smaller. That is, the smaller the value of u, the larger the proportion of the no-wind state and the smaller the proportion of the constant wind state. The proportion of the no-wind state and the proportion of the constant wind state can be expressed as the duration of the no-wind state and the duration of the constant wind state of the wind speed.

[0269] It can be set that when u2 < u < 0, the controller controls the relay valve not to deliver air to the drying air device or the load heat dissipation device. As the value of u becomes smaller, the proportion of the no-wind state is larger and the proportion of the constant wind state is smaller. When u = u2, the controller controls the auxiliary air supply module to always be in the no-wind state.

[0270] Among them, the proportion ranges of the no-wind state, the constant wind state, and the increasing state can be specified by oneself, or the pressure reduction proportion and the pressure holding proportion can be controlled to change uniformly through a linear function.

[0271] In some embodiments of the present application, the controller is configured to: obtain the actual wind speed value S' through the first flow rate or the second flow rate.

[0272] Define the difference between the desired wind speed value S and the actual wind speed value S' as the error e; obtain the output u through PID control according to the error e.

[0273] Control the energization states of the third solenoid valve and the fourth solenoid valve according to the positive or negative value of the output u, and control the wind speed at which the relay valve delivers air to the drying air device and / or the load heat dissipation device through the energization states of the third solenoid valve and the fourth solenoid valve.

[0274] When the output u is greater than 0, the third solenoid valve and the fourth solenoid valve are de-energized, and the wind speed at which the relay valve delivers air to the drying air device and / or the load heat dissipation device increases.

[0275] The output u has a maximum value u1 and a minimum value u2. It can be set that when u1 > u > 0, it represents that the auxiliary air supply module is in the air intake state. At this time, the relay valve increases the air delivery speed to the drying air device and / or the load heat dissipation device. In the air intake state, the air delivery speed of the relay valve to the drying air device and / or the load heat dissipation device decreases from the increasing state to the constant air state. As the value of u becomes larger and larger, the proportion of the increasing state becomes larger, and the proportion of the constant air state becomes smaller. That is, the larger the value of u, the larger the proportion of the increasing state, and the smaller the proportion of the constant air state. The proportion of the increasing state and the proportion of the constant air state can be expressed as the duration of the increasing air speed state and the duration of the constant air state. When u = u1, the controller controls the auxiliary air supply module to always be in the air intake state.

[0276] When the output u is equal to 0, the third solenoid valve is de-energized and the fourth solenoid valve is energized. At this time, the auxiliary air supply module is in the constant air state, and the relay valve delivers air to the drying air device and / or the load heat dissipation device at a constant speed. It can be set that when the output u is approximately equal to 0, that is, it is considered that the output u is equal to 0 at this time, and the approximate value can be determined by the user.

[0277] When the output u is less than 0, the third solenoid valve and the fourth solenoid valve are energized. At this time, the auxiliary air supply module is in the no-air state, and the relay valve does not deliver air to the drying air device or the load heat dissipation device. In the no-air state, the air delivery speed of the relay valve to the drying air device and / or the load heat dissipation device increases from the no-air state to the constant air state. As the value of u becomes smaller and smaller, the proportion of the no-air state becomes larger, and the proportion of the constant air state becomes smaller. That is, the smaller the value of u, the larger the proportion of the no-air state, and the smaller the proportion of the constant air state. The proportion of the no-air state and the proportion of the constant air state can be expressed as the duration of the no-air state and the duration of the constant air speed state.

[0278] It can be set that when u2 < u < 0, the controller controls the relay valve not to deliver air to the drying air device or the load heat dissipation device. As the value of u becomes smaller, the proportion of the no-air state becomes larger, and the proportion of the constant air state becomes smaller. When u = u2, the controller controls the auxiliary air supply module to always be in the no-air state.

[0279] Among them, the proportion ranges of the no-air state, the constant air state, and the increasing state can be specified by oneself, or the decompression proportion and the pressure holding proportion can be controlled to change uniformly through a linear function.

[0280] In some embodiments of the present application, the controller is configured to: obtain an actual wind speed value S' at a first flow rate or a second flow rate; define the difference between the desired wind speed value S and the actual wind speed value S' as an error e; obtain an output u through PID control based on the error e. Control the energization states of a third solenoid valve and a fourth solenoid valve according to the positive or negative value of the output u, and control the wind speed at which the relay valve delivers air to the drying air device and / or the load heat dissipation device through the energization states of the third solenoid valve and the fourth solenoid valve.

[0281] The present application calculates the error e between the desired wind speed value S through the first flow rate or the second flow rate, and then outputs an accurate output u through PID control. The energization or de-energization of the third solenoid valve and the fourth solenoid valve is controlled according to the positive or negative value of the output u, thereby realizing the control of the wind speed output by the relay valve. The PID control logic of the present application can calculate the output u more accurately, thereby accurately controlling the movement of the third solenoid valve and the fourth solenoid valve, making the wind speed output by the relay valve to the drying air device and / or the heating load device more accurate.

[0282] In some embodiments of the present application, the dryer uses a single-chip microcomputer as the hardware. The single-chip microcomputer communicates with the WIFI module through the UART serial port to realize two-way communication between the mobile phone terminal and the single-chip microcomputer. When the controller detects a fault in the relay valve, the controller transmits the information about the relay valve fault to the cloud and the mobile phone terminal through the WIFI module to notify the user.

[0283] The controller can also transmit the status information of the door body being opened or closed to the cloud and the mobile phone terminal through the WIFI module for the user to view.

[0284] The user can issue an opening flag through the mobile phone terminal software, transmit the opening information to the controller through the cloud and the WIFI module, and control the automatic opening of the door body through the controller.

[0285] The IO output of the single-chip microcomputer is realized through the GPIO port, and then the opening and closing of the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are controlled.

[0286] The interaction force F0 between the door body and the cabinet is detected by a pressure sensor, and the interaction force F0 is converted from an analog signal to a digital signal by an analog-to-digital converter. The data acquisition of the force is completed through three-channel analog-to-digital conversion. The controller has a timing interrupt, calculates the output through the PID control of the auxiliary door opening module, and finally controls the pressurization, depressurization and pressure maintenance of the pressure regulating module by controlling the energization or de-energization of the first solenoid valve and the second solenoid valve, and finally pushes open the door body of the dryer through the auxiliary door opening device.

[0287] The first wind speed detected by the first wind speed sensor 67 and the second wind speed detected by the second wind speed sensor 68, and the analog signal detected by the analog-to-digital converter is converted into a digital signal. The data acquisition of the wind speed is completed through analog-to-digital conversion. The controller has a timing interrupt, calculates the output u through the PID control of the auxiliary air supply module, and controls the energization or de-energization of the third solenoid valve and the fourth solenoid valve according to the magnitude of the value of the output u, thereby realizing the control of the wind speed output by the relay valve.

[0288] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0289] For the sake of convenience of explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussions are not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A dryer, characterized in that, Comprising: Cabinet; Drying cylinder, disposed within the cabinet; Heat load, disposed within the cabinet, the heat load capable of generating heat when operation is started; Auxiliary air supply module, disposed within the cabinet, for supplying air into the drying cylinder and / or for supplying air to the heat load; The auxiliary air supply module comprises: Power source, for providing compressed air; Pressure reducing device, for reducing the pressure of the air flowing through the pressure reducing device, the air inlet of the pressure reducing device being in communication with the air outlet of the power source; Air flow regulating device, for regulating the air flow rate, the air inlet of the air flow regulating device being in communication with the air outlet of the pressure reducing device, the air flow regulating device outputting a pre-controlled flow rate; Drying air device, for sending the air transmitted to the drying air device into the drying cylinder; Load heat dissipation device, for sending the air transmitted to the load heat dissipation device to flow through the heat load; Reversing solenoid valve, which is in communication with the load heat dissipation device when energized and is in communication with the drying air device when de-energized; Relay valve, its air inlet being in communication with the air outlet of the power source and its air outlet being in communication with the inlet of the reversing solenoid valve; the pilot port of the relay valve is connected to the air flow regulating device; First air velocity sensor, for detecting the air flow velocity between the reversing solenoid valve and the load heat dissipation device and recording the detected flow velocity as the first flow velocity; Second air velocity sensor, for detecting the air flow velocity between the air outlet of the relay valve and the drying air device and recording the detected flow velocity as the second flow velocity; The air flow regulating device comprises: Third solenoid valve, its inlet being connected to the outlet of the pressure reducing valve; Fourth solenoid valve, its inlet being connected to the outlet of the third solenoid valve and the pilot port of the relay valve; Controller, configured to: Obtain an actual air velocity value S' based on the first flow velocity or the second flow velocity; Define the difference between the desired air velocity value S and the actual air velocity value S' as the error e; Obtain an output u through PID control based on the error e; Control the energized states of the third solenoid valve and the fourth solenoid valve according to the magnitude of the value of the output u, and control the air flow velocity at which the relay valve supplies air to the drying air device and / or the load heat dissipation device through the energized states of the third solenoid valve and the fourth solenoid valve.

2. A dryer, characterized in that, Comprising: Cabinet; Drying cylinder, disposed within the cabinet; Heat load, disposed within the cabinet, the heat load capable of generating heat when operation is started; Auxiliary air supply module, disposed within the cabinet, for supplying air into the drying cylinder and / or for supplying air to the heat load; The auxiliary air supply module comprises: Power source, for providing compressed air; Pressure reducing device, for reducing the pressure of the air flowing through the pressure reducing device, the air inlet of the pressure reducing device being in communication with the air outlet of the power source; Air flow regulating device, for regulating the air flow rate, the air inlet of the air flow regulating device being in communication with the air outlet of the pressure reducing device, the air flow regulating device outputting a pre-controlled flow rate; Drying air device, for sending the air transmitted to the drying air device into the drying cylinder; Load heat dissipation device, for sending the air transmitted to the load heat dissipation device to flow through the heat load; A reversing solenoid valve, which is connected to the load heat dissipation device when energized and is connected to the drying air device when de-energized; A relay valve, whose air inlet is connected to the air outlet of the power source and whose air outlet is connected to the inlet of the pressure passage; the pilot port of the relay valve is connected to the pressure regulating device; the relay valve receives the pre-control flow output by the speed regulating device, and the relay valve amplifies the flow according to the pre-control flow and outputs driving air to the reversing solenoid valve; A first air velocity sensor, which is used to detect the air velocity between the reversing solenoid valve and the load heat dissipation device and record the detected air velocity as the first air velocity; A second air velocity sensor, which is used to detect the air velocity between the air outlet of the relay valve and the drying air device and record the detected air velocity as the second air velocity; The speed regulating device includes: A third solenoid valve, whose inlet is connected to the outlet of the pressure reducing valve; A fourth solenoid valve, whose inlet is connected to the outlet of the third solenoid valve and the pilot port of the relay valve; A controller, configured to: Obtain the actual air velocity value S' through the first air velocity or the second air velocity; Define the difference between the desired air velocity value S and the actual air velocity value S' as the error e; Obtain the output u through PID control according to the error e; According to the positive or negative value of the output u, control the energization states of the third solenoid valve and the fourth solenoid valve, and control the air velocity of the relay valve to supply air to the drying air device and / or the load heat dissipation device through the energization states of the third solenoid valve and the fourth solenoid valve.

3. The clothes dryer according to claim 1, wherein The PID control includes: a preset proportional term K p , an integral term K i and a derivative term K d . An operation is performed on the proportional term K p and the error e at the k-th time to obtain a proportional parameter. An operation is performed on the integral term K i and the sum of the errors e from the 1st to the k-th time to obtain an integral parameter. An operation is performed on the derivative term K d and the difference between the error at the k-th time and the error at the (k - 1)-th time to obtain a derivative parameter; The values of the proportional parameter, the integral parameter, and the differential parameter are added to obtain the value of the output u(k) at the kth time.

4. The clothes dryer according to claim 3, wherein By means of the proportional term K p Multiply with the error e at the k-th time to obtain the proportional parameter; Multiply by the integral term K i and the sum of the errors e from the first to the k-th time to obtain the integral parameter; Multiply by the differential term K d with the difference between the error at the k-th time and the error at the (k - 1)-th time to obtain the differential parameter.

5. The clothes dryer according to claim 3 or 4, wherein The controller is configured to: after a preset time interval, perform an operation based on the error e, the proportional term K p , the integral term K i and the derivative term K d to obtain the value of the output quantity u at the k-th time.

6. The clothes dryer according to claim 3 or 4, wherein When the output u is greater than 0, the third solenoid valve and the fourth solenoid valve are de-energized, and the air velocity of the relay valve to supply air to the drying air device and / or the load heat dissipation device increases.

7. The clothes dryer according to claim 3 or 4, wherein When the output u is equal to 0, the third solenoid valve is de-energized and the fourth solenoid valve is energized, and the relay valve supplies air to the drying air device and / or the load heat dissipation device at a constant speed.

8. The clothes dryer according to claim 3 or 4, wherein When the output u is less than 0, the third solenoid valve and the fourth solenoid valve are energized, and the relay valve does not supply air to the drying air device or the load heat dissipation device.

9. The clothes dryer according to claim 8, wherein The controller is configured to: when the controller controls the reversing solenoid valve to be de-energized, the fifth solenoid valve to be de-energized, the third solenoid valve to be de-energized, and the fourth solenoid valve to be de-energized, the auxiliary air supply module supplies air to the drying air device; When the controller controls the reversing solenoid valve to be energized, the fifth solenoid valve to be de-energized, the third solenoid valve to be de-energized, and the fourth solenoid valve to be de-energized, the auxiliary air supply module supplies air to the load heat dissipation device.

10. The clothes dryer according to claim 8 or 9, characterized in that The controller is configured to: when the controller controls the reversing solenoid valve to be de-energized or energized, the fifth solenoid valve to be energized, the third solenoid valve to be de-energized, and the fourth solenoid valve to be de-energized, the auxiliary air supply module supplies air to the drying air device and the load heat dissipation device; When the controller controls the reversing solenoid valve to be de-energized or energized, the fifth solenoid valve to be de-energized or energized, the third solenoid valve to be energized, and the fourth solenoid valve to be energized, the auxiliary air supply module stops supplying air to the drying air device and the load heat dissipation device.

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