CN106012454A - Solar central laundry dryer - Google Patents

Abstract

A solar energy central drying device is characterized in that it includes a drying oven, an air compressor, an air tank, a control valve, a heat exchanger and a solar heat collecting plate connected in sequence; There are multiple air intake holes on the air intake tray, and an air outlet tray on the lower part of the oven, and multiple air outlet holes on the air outlet tray; the air compressor compresses the air and sends it to the air tank, and then sends it to the air tank through the control valve. The heat exchanger is heated, and then the air inlet pan enters the drying space between the air intake pan and the air outlet pan to dry the clothes; the air coming out of the air outlet pan returns to the inlet of the air compressor for compression; the solar collector The hot plate is arranged on the heat exchanger and is used for providing heating heat for the heat exchanger.

Description

A solar central drying device

technical field

The invention relates to the field of clothes drying, in particular to a solar central clothes drying device.

Background technique

Using solar energy to dry clothes is a new type of clothes drying method. Existing solar red clothes devices often have problems such as too complicated structure, too much power consumption, and precise control.

Contents of the invention

In view of the above problems, the present invention provides a central solar drying device.

The object of the present invention adopts following technical scheme to realize:

A solar energy central drying device is characterized in that it includes a drying oven, an air compressor, an air tank, a control valve, a heat exchanger and a solar heat collecting plate connected in sequence; There are multiple air intake holes on the air intake tray, and an air outlet tray on the lower part of the oven, and multiple air outlet holes on the air outlet tray; the air compressor compresses the air and sends it to the air tank, and then sends it to the air tank through the control valve. The heat exchanger is heated, and then the air inlet pan enters the drying space between the air intake pan and the air outlet pan to dry the clothes; the air coming out of the air outlet pan returns to the inlet of the air compressor for compression; the solar collector The hot plate is arranged on the heat exchanger and is used for providing heating heat for the heat exchanger.

Preferably, the air compressor is a centrifugal air compressor.

Preferably, the heat exchanger adopts tube heat exchange, air is passed through the pipe, and water is passed between the pipe and the shell of the heat exchanger.

Preferably, the control valve includes a valve housing, a controller housing, a main valve, a built-in pressure sensor, a proportional solenoid, a proportional controller and a heat dissipation-heating system; Through valve, the main valve includes an end cap, a piston, a tail cap, a feedback spring and a valve body, the feedback spring is sleeved on the tail cap, and the piston and the tail cap are threaded; the proportional electromagnet includes an armature and a coil , the left end of the armature is fixedly connected with a thrust rod, the end cap is threadedly connected to the thrust rod, and both the piston and the end cap are arranged in the valve body;

The chamber where the feedback spring is located is called a pressure regulating chamber, and the pressure regulating chamber is connected with an output port; an air inlet chamber is formed between the valve body and the concave part of the piston, and the air inlet chamber is connected with an air inlet; the tail cover is located The chamber of the exhaust chamber is called the exhaust chamber, and the exhaust chamber is connected with an exhaust port, and the exhaust port is connected to the atmosphere; the output port supplies air to the outside, and the air inlet, output port and exhaust port are equipped with the valve body. The guide plate communicates with the outside; the left end of the valve body is provided with a first boss, and the first boss and the right side of the tail cover form the main throttle port; the right end of the piston is provided with a second boss, and the second boss It forms an overflow port with the left side of the end cover; a sealing ring groove is also provided on the left side of the end cover, and the sealing ring groove is used to cooperate with the second boss to prevent the overflow port from leaking when the overflow port is closed. Gas, a layer of rubber layer is laid on the surface of the sealing ring groove, and a rubber sealing ring is inlaid on the right side of the tail cover; a layer of polymer composite nylon layer is arranged on the outer surface of the piston, and the polymer composite nylon layer It is made by polycondensation of diamine and dibasic acid, and epoxy resin and glass fiber are added during the polycondensation process; a silica gel rod for detecting air moisture in the valve is also installed in the pressure regulating chamber, and one end of the silica gel rod Suspended in the pressure regulating chamber, the other end extends out of the valve housing, and the part extending out of the valve housing is set in a glass tube, and the glass tube is fixed on the surface of the valve housing; the proportional controller is set on In the controller shell, the built-in pressure sensor is HT19 silicon piezoresistive sensor, which is used to measure the air pressure in the pressure regulating chamber and convert the detected pressure value into a voltage signal;

The heat dissipation-heating system includes an annular heat dissipation space, an annular heating space, an air collecting box and a main heat dissipation body. The annular heat dissipation space surrounds the wall of the heat dissipation tank containing the coil, and one end of the annular heat dissipation space communicates with the air collecting box. The other end communicates with the outlet of the main radiator, and the gas collecting box is integrated on the lower surface of the valve housing; the annular heating space surrounds the outside of the heating tank wall of the pressure regulating chamber, and one end of the annular heating space communicates with the gas collecting box , the other end communicates with the entrance of the main cooling body, the cooling tank wall and the heating tank wall are made of aluminum alloy, and the thickness is 10mm; the main cooling body is integrated on the upper surface of the controller shell, including a plurality of horizontal Arranged small-diameter heat dissipation pipes and two vertically arranged hollow supports, the small-diameter heat dissipation pipes and the hollow supports are integrally formed and communicate with each other; the bottom of the pipe at the air inlet is also connected to the power pipe to the gas collection box, so A pressure reducing valve is set on the above-mentioned power pipe; a one-way check valve is set on the pipeline from the annular heat dissipation space to the gas collection box, and from the gas collection box to the annular heating space, and the installation directions are respectively from the annular heat dissipation space to the gas collection box. , from the gas collecting box to the annular heating space; when the control valve is working, the annular cooling space, the annular heating space, the gas collecting box and the main cooling body together form a heat exchange loop, which is driven by the pressure of the air in the power tube to circulate , the heat of the coil is transferred to the air in the annular heat dissipation space through the heat dissipation groove wall, and then enters the gas collecting box and the annular heating space in turn, and in the annular heating space, the heat is transferred to the pressure regulating chamber through the heating wall groove to heat the pressure regulating chamber The air is used to increase the temperature of the decompressed air in the pressure regulating chamber to reduce frosting; the heated air is continuously driven to the main radiator, where the excess heat is transferred to the In the ambient air, the air cooled by the main heat sink enters the annular heat dissipation space again, and a thermodynamic cycle is completed so far; the pressure reducing valve is used to adjust the flow rate of the heat exchange loop, and then control the temperature of the coil and the inside of the pressure regulating chamber. The temperature of the air. When the operator observes that the silica gel rod in the glass tube changes from blue to red, he manually opens the opening of the pressure reducing valve to increase the temperature of the air in the pressure regulating chamber;

The proportional controller includes a single-chip microcomputer, a power drive module and a power supply module, wherein the single-chip microcomputer is connected to the power drive module, and the power drive module is used to supply power to the coil to drive the armature to move; the power supply module is used to supply power to the power drive module, and the power supply module It includes a directional diode, a current-limiting resistor and a π-type LC filter connected in sequence. The directional diode is used to avoid damage to the circuit caused by reverse connection of the power supply. The current-limiting resistor includes two parallel connections with a power of 0.25W and a resistance of A protection resistor of 1Ω is used to prevent the coil from short-circuiting and burning the circuit board; the π-type LC filter is used to weaken the ripple noise in the circuit, which includes 2 capacitors and 1 inductor; 2 capacitors are also connected in parallel before the direction diode A transient voltage suppression diode is also connected in parallel between the bypass capacitor, the current limiting resistor and the π-type LC filter to suppress the voltage peak in the circuit; the output terminal of the power module is also used as a backup power supply for the built-in pressure sensor , which is connected to the built-in pressure sensor through a relay and a step-down transformer; a power detector is arranged on the normal working power supply of the built-in pressure sensor, and when the power detector detects that the normal working power supply is de-energized, a power level is sent The signal is sent to the relay, and the relay is closed under the action of the level signal to connect the circuit from the power module to the step-down transformer to supply power to the built-in pressure sensor.

Preferably, when the feedback pressure detected by the built-in pressure sensor is lower than the set pressure, the proportional controller increases the output current of the coil, the thrust of the thrust rod increases, and the opening of the main throttle increases, so that the output of the output port When the pressure increases, the control valve works in a decompression state; on the contrary, when the detected feedback pressure is greater than the set pressure, the proportional controller reduces the output current, the thrust of the thrust rod decreases, the main throttle port is closed, and the overflow port Open, the air in the pressure regulating chamber is discharged to the atmosphere through the overflow port, the pressure of the output port decreases, and the control valve works in the overflow state at this time.

The beneficial effects of the present invention are as follows: 1. Drying is carried out by means of pneumatic control and solar heating, with precise control, clean energy, and simple and practical structure; 2. A new control valve is designed with a simple and reasonable structure, which can realize air supply Accurate control of pressure, re-arrangement of the sealing of its components, and the use of new material polymer composite nylon layer to replace the existing friction surface material, which greatly improves the service life of the control valve and effectively reduces the main joint. When the orifice is opened, the air that leaks from the overflow port into the exhaust port is bypassed from the worn part; 3. A heat dissipation-heating system is designed, which uses the heat generated by the electromagnet coil to heat the pressure regulating chamber, and at the same time solves the problem of air loss in the air. In the process of pressure expansion, there are two problems of dew condensation and freezing in the pressure regulating chamber and heating of the solenoid coil, and through this hollow heat dissipation and heating space structure, the use of expensive main valve materials can be reduced, which helps to save costs and reduce weight , the cooling tank wall and the heating tank wall are made of aluminum alloy, and the thickness is 10mm, and the maintenance cycle of the control valve is extended by 30% compared with the unimproved one; 4. Through the setting of the silica gel rod, the operator can observe the silica gel rod in the glass tube Judging the moisture level of the air in the pressure regulating chamber based on the state of the pressure regulating chamber, and manually opening the opening of the pressure reducing valve to increase the temperature of the air in the pressure regulating chamber, which further suppresses the occurrence of frosting and icing; 5. Design A new power supply module has been developed, which has the advantages of high power supply quality and obvious anti-error current limiting effect, and through the design of relays, power detectors and other components, the power consumption of components such as current limiting resistors is effectively reduced, and the control valve is saved. The role of running power consumption, but also improve the safety of the system work.

Description of drawings

The present invention is further described by using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, without paying creative work, other embodiments can also be obtained according to the following accompanying drawings Attached picture.

Fig. 1 is the overall structural representation of the present invention;

Figure 2 is a schematic diagram of the overall structure of the control valve;

Fig. 3 is the air flow diagram of decompression state;

Fig. 4 is the air flow diagram of overflow state;

Figure 5 is an external schematic diagram of the control valve;

Fig. 6 is the structural block diagram of proportional controller;

Fig. 7 is a schematic structural diagram of the power module.

Reference signs: oven-1; air compressor-2; air tank-3; control valve-4; heat exchanger-5; ;Air outlet disc-9; Air outlet-10; Drying space-11; -20; valve body-21; armature-22; coil-23; thrust rod-24; Exhaust port-30; deflector-31; first boss-32; main throttle port-33; second boss-34; overflow port-35; polymer composite nylon layer-36; silicone rod- 37; glass tube-38; controller shell-39; annular cooling space-40; annular heating space-41; Diameter cooling pipe-46; hollow support body-47; power pipe-48; pressure reducing valve-49; one-way check valve-50; drain valve-51; ; Direction diode-55; Current limiting resistor-56; Capacitor-57; Inductor-58; Bypass capacitor-59; Transient voltage suppression diode-60; Relay-61; ; Normal working power supply -64.

detailed description

The present invention is further described in conjunction with the following examples.

Example 1:

A kind of solar energy central drying device as shown in Figure 1, comprises the drying oven 1, air compressor 2, air tank 3, control valve 4, heat exchanger 5 and solar heat collecting plate 6 connected successively; The upper part of the oven 1 is provided with an air inlet tray 7, and the air inlet tray 7 is provided with a plurality of air inlet holes 8, and the lower part of the oven 1 is provided with an air outlet tray 9, and the air outlet tray 9 is provided with a plurality of air outlet holes 10; The machine 2 compresses the air and sends it to the air tank 3, then sends it to the heat exchanger 5 through the control valve 4 for heating, and then enters the drying space 11 between the air inlet disk 7 and the air outlet disk 9 through the air inlet disk 7. drying; the air coming out of the air outlet tray 9 returns to the inlet of the air compressor 2 for compression; The air compressor 2 is a centrifugal air compressor 2 . The heat exchanger 5 adopts tubular heat exchange, air is passed through the pipe, and water is passed between the pipe and the shell of the heat exchanger.

As shown in FIG. 2 , the control valve 4 includes a valve housing 14 , a controller housing 39 , a main valve, a built-in pressure sensor 15 , a proportional solenoid, a proportional controller 16 and a cooling-heating system. The main valve is installed in the valve casing 14, which is a two-position three-way valve, including an end cover 17, a piston 18, a tail cover 19, a feedback spring 20 and a valve body 21, the feedback spring 20 is sleeved on the tail cover 19, and the piston 18 It is threaded connection with the tail cap 19. The proportional electromagnet includes an armature 22 and a coil 23 , the left end of the armature 22 is fixedly connected with a thrust rod 24 , the end cap 17 is screwed on the thrust rod 24 , the piston 18 and the end cap 17 are both arranged in the valve body 21 .

As shown in FIGS. 3-5 , the chamber where the feedback spring 20 is located is called a pressure regulating chamber 25 , and the pressure regulating chamber 25 is connected with an output port 26 . An air intake chamber 27 is formed between the valve body 21 and the concave portion of the piston 18 , and the air intake chamber 27 communicates with an air inlet 28 . The chamber where the tail cover 19 is located is called an exhaust chamber 29, and the exhaust chamber 29 communicates with an exhaust port 30, and the exhaust port 30 communicates with the atmosphere. The output port 26 supplies air to the outside, and the air inlet 28 , the output port 26 and the exhaust port 30 communicate with the outside through the guide plate 31 configured for the valve body 21 . The left end of the valve body 21 is provided with a first boss 32 , and the first boss 32 and the right side of the tail cap 19 form a main throttle opening 33 . The right end of the piston 18 is provided with a second boss 34 , and the second boss 34 and the left side of the end cover 17 form an overflow port 35 . The left side of the end cover 17 is also provided with a sealing ring groove (not shown in the figure), and the sealing ring groove is used to cooperate with the second boss 34 to prevent the overflow port 35 from leaking when the overflow port 35 is closed. The surface of the ring groove is laid with a layer of rubber, and the right side of the tail cover 19 is inlaid with a rubber sealing ring. Figure 3 and Figure 4 respectively show the air flow diagrams in the decompression state and the overflow state: when the feedback pressure detected by the built-in pressure sensor 15 is less than the set pressure, the proportional controller 16 increases the output current of the coil 23, The thrust of the thrust rod 24 increases, and the opening of the main throttle port 33 increases, so that the output pressure of the output port 26 increases, and the control valve 4 works in a decompression state; on the contrary, when the detected feedback pressure is greater than the set pressure , the proportional controller 16 reduces the output current, the thrust of the thrust rod 24 decreases, the main throttle port 33 is closed, the overflow port 35 is opened, the air in the pressure regulating chamber 25 is discharged to the atmosphere through the overflow port 35, and the output port 26 The pressure is reduced, and the control valve 4 works in the overflow state.

The inventors have found through research that during the frequent action of the control valve, the contact surface between the piston 18 and the valve body 21 is prone to wear, and in the long run, part of the air will bypass the worn part when the main throttle port 33 is opened. The overflow port 35 leaks into the exhaust port 30, which is very unfavorable for the precise control of the control valve, so the outer surface of the piston 18 is provided with a layer of polymer composite nylon layer 36, which is made of binary Amine and dibasic acid are produced by polycondensation, and epoxy resin and glass fiber are added in the polycondensation process. The wear resistance coefficient of the material is 2-3 times that of 30# steel, and the wear resistance is 1.5 times that of 30# steel. , The shear strength is 30-40MPa, and the fatigue resistance is outstanding, which greatly reduces the wear and prolongs the service life of the valve core. The pressure regulating chamber 25 is also provided with a silica gel rod 37 for detecting air moisture in the valve. One end of the silica gel rod 37 is suspended in the pressure regulating chamber 25, and the other end extends out of the valve housing 14, and extends out of the valve housing 14. Part of it is set in a glass tube 38 (see FIG. 5 ), and the glass tube 38 is affixed to the surface of the valve housing 14 . The proportional controller is arranged in the controller housing 39, and the built-in pressure sensor 16 is a HT19 silicon piezoresistive sensor, which is used to measure the air pressure in the pressure regulating chamber 25 and convert the detected pressure value into a voltage signal. Its core It is a highly stable diffused silicon element. Its working principle is to transmit the differential pressure of the measured medium to the silicon bridge plate through the isolation diaphragm and silicone oil, and use the piezoresistive effect principle of diffused silicon to measure the air pressure. It is powered by a 5V power supply. .

There are two problems in the use of the control valve: (1) During the process of decompression and expansion, the air cools down rapidly and the water is precipitated rapidly, so the dew condensation and freezing phenomenon in the pressure regulating chamber are serious, which greatly affects the performance and performance of the components. (2) For the control valve using proportional electromagnet, in the process of maintaining the output pressure, the proportional electromagnet needs to continue to consume electric energy, which increases the power consumption of the control valve and causes the coil 23 to heat up more than other Valves are serious. Therefore as shown in Figures 2 and 5, a heat radiation-heating system has also been designed, which includes an annular heat dissipation space 40, an annular heating space 41, an air collecting box 42 and a main heat dissipation body 43, and the annular heat dissipation space 40 is surrounded by the heat radiation that accommodates the coil 23. Outside the groove wall 44, one end of the annular heat dissipation space 40 is connected with the gas collecting box 42, and the other end is connected with the outlet of the main cooling body 43. The gas collecting box 45 is integrated on the lower surface of the valve housing 14, and the gas collecting box 45 is set The reason for the low point is that it is convenient to drain the accumulated water in the heat exchange loop by opening the drain valve 51 arranged at the bottom of the gas collection box 45, so as to ensure the efficiency of heat exchange and reduce the corrosion of the heat exchange surface. The annular heating space 41 surrounds the outside of the heating tank wall 45 of the pressure regulating chamber 25. One end of the annular heating space 41 communicates with the gas collecting box 42, and the other end communicates with the entrance of the main radiator 43 (because of the viewing angle, Fig. 2 The communication interface between the annular heat dissipation space 40 and the annular heating space 41 is not shown), in order to ensure heat transfer efficiency, the heat dissipation groove wall 44 and the heating groove wall 45 are made of aluminum alloy with a thickness of 10mm. The main cooling body 43 is integrated on the upper surface of the controller housing 39, including a plurality of horizontally arranged small-diameter heat dissipation pipes 46 and two vertically arranged hollow supports 47, and the small-diameter heat dissipation pipes 46 and the hollow support bodies 47 are integrally formed and interconnected. The bottom of the pipeline of the air inlet 28 is also connected with a power pipe 48 to the gas collection box 42 , and a pressure reducing valve 49 is arranged on the power pipe 48 . One-way check valves 50 are arranged on the pipelines from the annular heat dissipation space 40 to the gas collection box 42, and from the gas collection box 42 to the annular heating space 41, and the installation directions are respectively directed from the annular heat dissipation space 40 to the gas collection box 42, and from the gas collection box 42 to the gas collection box 42. The air box 43 points to the annular heating space 44 and is used to ensure that the air in the heat exchange loop flows in a predetermined direction. When the control valve 4 is working, the annular heat dissipation space 40, the annular heating space 41, the gas collecting box 42 and the main heat dissipation body 43 together form a heat exchange loop, which circulates under the pressure of the air in the power pipe 48, and the heat of the coil 23 The air transferred to the annular heat dissipation space 40 through the heat dissipation groove wall 44, and then enters the gas collecting box 42 and the annular heating space 41 in turn, and in the annular heating space 41, the heat is transferred to the pressure regulating chamber 25 through the heating wall groove 45 to heat the regulating chamber. The air in the pressure chamber 25 is used to increase the temperature of the decompressed air in the pressure regulating chamber 25 to make it higher than the dew point temperature of the moisture in the air to reduce frosting; the heated air continues to be driven to the main radiator 43, In the main heat dissipation body 43 , excess heat is transferred to the ambient air through a plurality of small-diameter heat dissipation pipes 46 , and the air cooled by the main heat dissipation body 43 enters the annular heat dissipation space 40 again, thus completing a thermodynamic cycle. The pressure reducing valve 49 is used to regulate the flow velocity of the heat exchange loop, and then controls the temperature of the coil 23 and the temperature of the air in the pressure regulating chamber 25. When the operator observes that the silica gel rod 37 in the glass tube 38 changes from blue to red ( When showing that the silica gel rod 37 absorbs more water), manually open the opening degree of the large pressure reducing valve 49 to improve the temperature of the air in the pressure regulating chamber 25.

As shown in FIG. 6 , the proportional controller 16 includes a single-chip microcomputer 52 , a power drive module 53 and a power supply module 54 , wherein the single-chip microcomputer 52 is connected to the power drive module 53 , and the power drive module 53 is used to supply power to the coil 23 to drive the armature 22 to move. As shown in Figure 7, the power supply module 54 is used to supply power to the power drive module 53. The power supply module 54 includes a directional diode 55, a current limiting resistor 56 and a π-type LC filter connected in sequence, and the directional diode 55 is used to avoid reverse connection of the power supply. For damage to the circuit, the current limiting resistor 56 includes two parallel protection resistors with a power of 0.25W and a resistance value of 1Ω, which are used to prevent the short circuit of the coil 23 from burning the circuit board, and the π-type LC filter is used to weaken the ripple noise in the circuit. It includes 2 capacitors 57 and 1 inductor 58 . Two bypass capacitors 59 are connected in parallel in front of the direction diode 55, and a transient voltage suppression diode 60 is connected in parallel between the current limiting resistor 56 and the π-type LC filter to suppress voltage peaks in the circuit. The output end of the power module 54 is also used as a backup power supply for the built-in pressure sensor 15 , which is connected to the built-in pressure sensor 15 through a relay 61 and a step-down transformer 62 . The normal operating power supply 64 of the built-in pressure sensor 15 (obtained by the simple step-down of the mains power) is provided with a power detector 63, when the power detector 63 (the prior art, the power detector that can detect the power signal on the market can be used) ) When detecting that the normal working power supply 64 is de-energized, the level signal is sent to the relay 61, and the relay 61 is pulled in under the action of the level signal to connect the circuit from the power module 54 to the step-down transformer 62 to supply power to the built-in pressure sensor 15. The advantage of this power supply method is that in the prior art, the normal working power supply of the built-in pressure sensor 15 is often integrated in the power supply module 54, but in fact the built-in pressure sensor 15 does not have high quality requirements for the power supply, so the normal working power supply 64 can use the power supply that has not been processed by the power supply module 54, and only when the normal working power supply 64 loses power, it automatically switches to the power supply module 54 for power supply through the relay 61, which can reduce the power consumption of components such as the current limiting resistor 56, and play a saving control The role of valve operation power consumption, but also improve the safety of the system work. Other parts not involved in the proportional controller 16 can be realized by existing technology, so this embodiment will not describe in detail.

In this embodiment, 1. Drying is carried out by means of pneumatic control and solar heating, with precise control, clean energy, and simple and practical structure; 2. A new control valve is designed with a simple and reasonable structure, which can realize air supply pressure Accurate control, re-arrangement of the sealing of its components, and the use of new material polymer composite nylon layer 36 to replace the existing friction surface material, greatly improving the service life of the control valve and effectively reducing the main joint When the flow port 35 is opened, the air leaked from the overflow port 35 into the exhaust port 30 is bypassed from the worn part; 3, a heat dissipation-heating system is designed, and the heat generated by the coil 23 is used to heat the pressure regulating chamber 25, and at the same time solve the problem of It solves the two problems of dew condensation and freezing in the pressure regulating chamber 25 and heating of the coil 23 during the decompression and expansion process of the air, and through this hollow heat dissipation and heating space structure, the use of expensive main valve materials can be reduced, which helps to save Cost and light weight, the heat dissipation tank wall 44 and the heating tank wall 45 are made of aluminum alloy, and the thickness is 10mm, the control valve maintenance cycle is extended by 30% compared with that before the improvement; 4. Through the setting of the silicone rod 37, the operator Can judge the air moisture level in the pressure regulating chamber 25 by observing the state of the silica gel rod 37 in the glass tube 38, and use this as a basis to manually open the opening degree of the pressure reducing valve 49 to improve the temperature of the air in the pressure regulating chamber 25, which in turn Further suppress the occurrence of frosting and icing; 5, designed a new power supply module 54, which has the advantages of high power supply quality, obvious anti-error current limiting effect, and through the design of components such as relay 61 and power detector 63, effective The power consumption of components such as the current-limiting resistor 56 is reduced, which plays a role in saving the operating power consumption of the control valve, and at the same time improves the safety of the system work.

Example 2:

A kind of solar energy central drying device as shown in Figure 1, comprises the drying oven 1, air compressor 2, air tank 3, control valve 4, heat exchanger 5 and solar heat collecting plate 6 connected successively; The upper part of the oven 1 is provided with an air inlet tray 7, and the air inlet tray 7 is provided with a plurality of air inlet holes 8, and the lower part of the oven 1 is provided with an air outlet tray 9, and the air outlet tray 9 is provided with a plurality of air outlet holes 10; The machine 2 compresses the air and sends it to the air tank 3, then sends it to the heat exchanger 5 through the control valve 4 for heating, and then enters the drying space 11 between the air inlet disk 7 and the air outlet disk 9 through the air inlet disk 7. drying; the air coming out of the air outlet tray 9 returns to the inlet of the air compressor 2 for compression; The air compressor 2 is a centrifugal air compressor 2 . The heat exchanger 5 adopts tubular heat exchange, air is passed through the pipe, and water is passed between the pipe and the shell of the heat exchanger.

As shown in FIG. 2 , the control valve 4 includes a valve housing 14 , a controller housing 39 , a main valve, a built-in pressure sensor 15 , a proportional solenoid, a proportional controller 16 and a cooling-heating system. The main valve is installed in the valve casing 14, which is a two-position three-way valve, including an end cover 17, a piston 18, a tail cover 19, a feedback spring 20 and a valve body 21, the feedback spring 20 is sleeved on the tail cover 19, and the piston 18 It is threaded connection with the tail cap 19. The proportional electromagnet includes an armature 22 and a coil 23 , the left end of the armature 22 is fixedly connected with a thrust rod 24 , the end cap 17 is screwed on the thrust rod 24 , the piston 18 and the end cap 17 are both arranged in the valve body 21 .

As shown in FIGS. 3-5 , the chamber where the feedback spring 20 is located is called a pressure regulating chamber 25 , and the pressure regulating chamber 25 is connected with an output port 26 . An air intake chamber 27 is formed between the valve body 21 and the concave portion of the piston 18 , and the air intake chamber 27 communicates with an air inlet 28 . The chamber where the tail cover 19 is located is called an exhaust chamber 29, and the exhaust chamber 29 communicates with an exhaust port 30, and the exhaust port 30 communicates with the atmosphere. The output port 26 supplies air to the outside, and the air inlet 28 , the output port 26 and the exhaust port 30 communicate with the outside through the guide plate 31 configured for the valve body 21 . The left end of the valve body 21 is provided with a first boss 32 , and the first boss 32 and the right side of the tail cap 19 form a main throttle opening 33 . The right end of the piston 18 is provided with a second boss 34 , and the second boss 34 and the left side of the end cover 17 form an overflow port 35 . The left side of the end cover 17 is also provided with a sealing ring groove (not shown in the figure), and the sealing ring groove is used to cooperate with the second boss 34 to prevent the overflow port 35 from leaking when the overflow port 35 is closed. The surface of the ring groove is laid with a layer of rubber, and the right side of the tail cover 19 is inlaid with a rubber sealing ring. Figure 3 and Figure 4 respectively show the air flow diagrams in the decompression state and the overflow state: when the feedback pressure detected by the built-in pressure sensor 15 is less than the set pressure, the proportional controller 16 increases the output current of the coil 23, The thrust of the thrust rod 24 increases, and the opening of the main throttle port 33 increases, so that the output pressure of the output port 26 increases, and the control valve 4 works in a decompression state; on the contrary, when the detected feedback pressure is greater than the set pressure , the proportional controller 16 reduces the output current, the thrust of the thrust rod 24 decreases, the main throttle port 33 is closed, the overflow port 35 is opened, the air in the pressure regulating chamber 25 is discharged to the atmosphere through the overflow port 35, and the output port 26 The pressure is reduced, and the control valve 4 works in the overflow state.

The inventors have found through research that during the frequent action of the control valve, the contact surface between the piston 18 and the valve body 21 is prone to wear, and in the long run, part of the air will bypass the worn part when the main throttle port 33 is opened. The overflow port 35 leaks into the exhaust port 30, which is very unfavorable for the precise control of the control valve, so the outer surface of the piston 18 is provided with a layer of polymer composite nylon layer 36, which is made of binary Amine and dibasic acid are produced by polycondensation, and epoxy resin and glass fiber are added in the polycondensation process. The wear resistance coefficient of the material is 2-3 times that of 30# steel, and the wear resistance is 1.5 times that of 30# steel. , The shear strength is 30-40MPa, and the fatigue resistance is outstanding, which greatly reduces the wear and prolongs the service life of the valve core. The pressure regulating chamber 25 is also provided with a silica gel rod 37 for detecting air moisture in the valve. One end of the silica gel rod 37 is suspended in the pressure regulating chamber 25, and the other end extends out of the valve housing 14, and extends out of the valve housing 14. Part of it is set in a glass tube 38 (see FIG. 5 ), and the glass tube 38 is affixed to the surface of the valve housing 14 . The proportional controller is arranged in the controller housing 39, and the built-in pressure sensor 16 is a HT19 silicon piezoresistive sensor, which is used to measure the air pressure in the pressure regulating chamber 25 and convert the detected pressure value into a voltage signal. Its core It is a highly stable diffused silicon element. Its working principle is to transmit the differential pressure of the measured medium to the silicon bridge plate through the isolation diaphragm and silicone oil, and use the piezoresistive effect principle of diffused silicon to measure the air pressure. It is powered by a 5V power supply. .

There are two problems in the use of the control valve: (1) During the process of decompression and expansion, the air cools down rapidly and the water is precipitated rapidly, so the dew condensation and freezing phenomenon in the pressure regulating chamber are serious, which greatly affects the performance and performance of the components. (2) For the control valve using proportional electromagnet, in the process of maintaining the output pressure, the proportional electromagnet needs to continue to consume electric energy, which increases the power consumption of the control valve and causes the coil 23 to heat up more than other Valves are serious. Therefore as shown in Figures 2 and 5, a heat radiation-heating system has also been designed, which includes an annular heat dissipation space 40, an annular heating space 41, an air collecting box 42 and a main heat dissipation body 43, and the annular heat dissipation space 40 is surrounded by the heat radiation that accommodates the coil 23. Outside the groove wall 44, one end of the annular heat dissipation space 40 is connected with the gas collecting box 42, and the other end is connected with the outlet of the main cooling body 43. The gas collecting box 45 is integrated on the lower surface of the valve housing 14, and the gas collecting box 45 is set The reason for the low point is that it is convenient to drain the accumulated water in the heat exchange loop by opening the drain valve 51 arranged at the bottom of the gas collection box 45, so as to ensure the efficiency of heat exchange and reduce the corrosion of the heat exchange surface. The annular heating space 41 surrounds the outside of the heating tank wall 45 of the pressure regulating chamber 25. One end of the annular heating space 41 communicates with the gas collecting box 42, and the other end communicates with the entrance of the main radiator 43 (because of the viewing angle, Fig. 2 The communication interface between the annular heat dissipation space 40 and the annular heating space 41 is not shown), in order to ensure heat transfer efficiency, the heat dissipation groove wall 44 and the heating groove wall 45 are made of aluminum alloy with a thickness of 9 mm. The main cooling body 43 is integrated on the upper surface of the controller housing 39, including a plurality of horizontally arranged small-diameter heat dissipation pipes 46 and two vertically arranged hollow supports 47, and the small-diameter heat dissipation pipes 46 and the hollow support bodies 47 are integrally formed and interconnected. The bottom of the pipeline of the air inlet 28 is also connected with a power pipe 48 to the gas collection box 42 , and a pressure reducing valve 49 is arranged on the power pipe 48 . One-way check valves 50 are arranged on the pipelines from the annular heat dissipation space 40 to the gas collection box 42, and from the gas collection box 42 to the annular heating space 41, and the installation directions are respectively directed from the annular heat dissipation space 40 to the gas collection box 42, and from the gas collection box 42 to the gas collection box 42. The air box 43 points to the annular heating space 44 and is used to ensure that the air in the heat exchange loop flows in a predetermined direction. When the control valve 4 is working, the annular heat dissipation space 40, the annular heating space 41, the gas collecting box 42 and the main heat dissipation body 43 together form a heat exchange loop, which circulates under the pressure of the air in the power pipe 48, and the heat of the coil 23 The air transferred to the annular heat dissipation space 40 through the heat dissipation groove wall 44, and then enters the gas collecting box 42 and the annular heating space 41 in turn, and in the annular heating space 41, the heat is transferred to the pressure regulating chamber 25 through the heating wall groove 45 to heat the regulating chamber. The air in the pressure chamber 25 is used to increase the temperature of the decompressed air in the pressure regulating chamber 25 to make it higher than the dew point temperature of the moisture in the air to reduce frosting; the heated air continues to be driven to the main radiator 43, In the main heat dissipation body 43 , excess heat is transferred to the ambient air through a plurality of small-diameter heat dissipation pipes 46 , and the air cooled by the main heat dissipation body 43 enters the annular heat dissipation space 40 again, thus completing a thermodynamic cycle. The pressure reducing valve 49 is used to regulate the flow velocity of the heat exchange loop, and then controls the temperature of the coil 23 and the temperature of the air in the pressure regulating chamber 25. When the operator observes that the silica gel rod 37 in the glass tube 38 changes from blue to red ( When showing that the silica gel rod 37 absorbs more water), manually open the opening degree of the large pressure reducing valve 49 to improve the temperature of the air in the pressure regulating chamber 25.

As shown in FIG. 6 , the proportional controller 16 includes a single-chip microcomputer 52 , a power drive module 53 and a power supply module 54 , wherein the single-chip microcomputer 52 is connected to the power drive module 53 , and the power drive module 53 is used to supply power to the coil 23 to drive the armature 22 to move. As shown in Figure 7, the power supply module 54 is used to supply power to the power drive module 53. The power supply module 54 includes a directional diode 55, a current limiting resistor 56 and a π-type LC filter connected in sequence, and the directional diode 55 is used to avoid reverse connection of the power supply. For damage to the circuit, the current limiting resistor 56 includes two parallel protection resistors with a power of 0.25W and a resistance value of 1Ω, which are used to prevent the short circuit of the coil 23 from burning the circuit board, and the π-type LC filter is used to weaken the ripple noise in the circuit. It includes 2 capacitors 57 and 1 inductor 58 . Two bypass capacitors 59 are connected in parallel in front of the direction diode 55, and a transient voltage suppression diode 60 is connected in parallel between the current limiting resistor 56 and the π-type LC filter to suppress voltage peaks in the circuit. The output end of the power module 54 is also used as a backup power supply for the built-in pressure sensor 15 , which is connected to the built-in pressure sensor 15 through a relay 61 and a step-down transformer 62 . The normal operating power supply 64 of the built-in pressure sensor 15 (obtained by the simple step-down of the mains power) is provided with a power detector 63, when the power detector 63 (the prior art, the power detector that can detect the power signal on the market can be used) ) When detecting that the normal working power supply 64 is de-energized, the level signal is sent to the relay 61, and the relay 61 is pulled in under the action of the level signal to connect the circuit from the power module 54 to the step-down transformer 62 to supply power to the built-in pressure sensor 15. The advantage of this power supply method is that in the prior art, the normal working power supply of the built-in pressure sensor 15 is often integrated in the power supply module 54, but in fact the built-in pressure sensor 15 does not have high quality requirements for the power supply, so the normal working power supply 64 can use the power supply that has not been processed by the power supply module 54, and only when the normal working power supply 64 loses power, it automatically switches to the power supply module 54 for power supply through the relay 61, which can reduce the power consumption of components such as the current limiting resistor 56, and play a saving control The role of valve operation power consumption, but also improve the safety of the system work. Other parts not involved in the proportional controller 16 can be realized by existing technology, so this embodiment will not describe in detail.

In this embodiment, 1. Drying is carried out by means of pneumatic control and solar heating, with precise control, clean energy, and simple and practical structure; 2. A new control valve is designed with a simple and reasonable structure, which can realize air supply pressure Accurate control, re-arrangement of the sealing of its components, and the use of new material polymer composite nylon layer 36 to replace the existing friction surface material, greatly improving the service life of the control valve and effectively reducing the main joint When the flow port 35 is opened, the air leaked from the overflow port 35 into the exhaust port 30 is bypassed from the worn part; 3, a heat dissipation-heating system is designed, and the heat generated by the coil 23 is used to heat the pressure regulating chamber 25, and at the same time solve the problem of It solves the two problems of dew condensation and freezing in the pressure regulating chamber 25 and heating of the coil 23 during the decompression and expansion process of the air, and through this hollow heat dissipation and heating space structure, the use of expensive main valve materials can be reduced, which helps to save Cost and light weight, the heat dissipation tank wall 44 and the heating tank wall 45 are made of aluminum alloy, and the thickness is 9mm, and the maintenance period of the control valve is extended by 35% compared with that before the improvement; 4. Through the setting of the silicone rod 37, the operator Can judge the air moisture level in the pressure regulating chamber 25 by observing the state of the silica gel rod 37 in the glass tube 38, and use this as a basis to manually open the opening degree of the pressure reducing valve 49 to improve the temperature of the air in the pressure regulating chamber 25, which in turn Further suppress the occurrence of frosting and icing; 5, designed a new power supply module 54, which has the advantages of high power supply quality, obvious anti-error current limiting effect, and through the design of components such as relay 61 and power detector 63, effective The power consumption of components such as the current-limiting resistor 56 is reduced, which plays a role in saving the operating power consumption of the control valve, and at the same time improves the safety of the system work.

Example 3:

A kind of solar energy central drying device as shown in Figure 1, comprises the drying oven 1, air compressor 2, air tank 3, control valve 4, heat exchanger 5 and solar heat collecting plate 6 connected successively; The upper part of the oven 1 is provided with an air inlet tray 7, and the air inlet tray 7 is provided with a plurality of air inlet holes 8, and the lower part of the oven 1 is provided with an air outlet tray 9, and the air outlet tray 9 is provided with a plurality of air outlet holes 10; The machine 2 compresses the air and sends it to the air tank 3, then sends it to the heat exchanger 5 through the control valve 4 for heating, and then enters the drying space 11 between the air inlet disk 7 and the air outlet disk 9 through the air inlet disk 7. drying; the air coming out of the air outlet tray 9 returns to the inlet of the air compressor 2 for compression; The air compressor 2 is a centrifugal air compressor 2 . The heat exchanger 5 adopts tubular heat exchange, air is passed through the pipe, and water is passed between the pipe and the shell of the heat exchanger.

As shown in FIG. 2 , the control valve 4 includes a valve housing 14 , a controller housing 39 , a main valve, a built-in pressure sensor 15 , a proportional solenoid, a proportional controller 16 and a cooling-heating system. The main valve is installed in the valve casing 14, which is a two-position three-way valve, including an end cover 17, a piston 18, a tail cover 19, a feedback spring 20 and a valve body 21, the feedback spring 20 is sleeved on the tail cover 19, and the piston 18 It is threaded connection with the tail cap 19. The proportional electromagnet includes an armature 22 and a coil 23 , the left end of the armature 22 is fixedly connected with a thrust rod 24 , the end cap 17 is screwed on the thrust rod 24 , the piston 18 and the end cap 17 are both arranged in the valve body 21 .

As shown in FIGS. 3-5 , the chamber where the feedback spring 20 is located is called a pressure regulating chamber 25 , and the pressure regulating chamber 25 is connected with an output port 26 . An air intake chamber 27 is formed between the valve body 21 and the concave portion of the piston 18 , and the air intake chamber 27 communicates with an air inlet 28 . The chamber where the tail cover 19 is located is called an exhaust chamber 29, and the exhaust chamber 29 communicates with an exhaust port 30, and the exhaust port 30 communicates with the atmosphere. The output port 26 supplies air to the outside, and the air inlet 28 , the output port 26 and the exhaust port 30 communicate with the outside through the guide plate 31 configured for the valve body 21 . The left end of the valve body 21 is provided with a first boss 32 , and the first boss 32 and the right side of the tail cap 19 form a main throttle opening 33 . The right end of the piston 18 is provided with a second boss 34 , and the second boss 34 and the left side of the end cover 17 form an overflow port 35 . The left side of the end cover 17 is also provided with a sealing ring groove (not shown in the figure), and the sealing ring groove is used to cooperate with the second boss 34 to prevent the overflow port 35 from leaking when the overflow port 35 is closed. The surface of the ring groove is laid with a layer of rubber, and the right side of the tail cover 19 is inlaid with a rubber sealing ring. Figure 3 and Figure 4 respectively show the air flow diagrams in the decompression state and the overflow state: when the feedback pressure detected by the built-in pressure sensor 15 is less than the set pressure, the proportional controller 16 increases the output current of the coil 23, The thrust of the thrust rod 24 increases, and the opening of the main throttle port 33 increases, so that the output pressure of the output port 26 increases, and the control valve 4 works in a decompression state; on the contrary, when the detected feedback pressure is greater than the set pressure , the proportional controller 16 reduces the output current, the thrust of the thrust rod 24 decreases, the main throttle port 33 is closed, the overflow port 35 is opened, the air in the pressure regulating chamber 25 is discharged to the atmosphere through the overflow port 35, and the output port 26 The pressure is reduced, and the control valve 4 works in the overflow state.

The inventors have found through research that during the frequent action of the control valve, the contact surface between the piston 18 and the valve body 21 is prone to wear, and in the long run, part of the air will bypass the worn part when the main throttle port 33 is opened. The overflow port 35 leaks into the exhaust port 30, which is very unfavorable for the precise control of the control valve, so the outer surface of the piston 18 is provided with a layer of polymer composite nylon layer 36, which is made of binary Amine and dibasic acid are produced by polycondensation, and epoxy resin and glass fiber are added in the polycondensation process. The wear resistance coefficient of the material is 2-3 times that of 30# steel, and the wear resistance is 1.5 times that of 30# steel. , The shear strength is 30-40MPa, and the fatigue resistance is outstanding, which greatly reduces the wear and prolongs the service life of the valve core. The pressure regulating chamber 25 is also provided with a silica gel rod 37 for detecting air moisture in the valve. One end of the silica gel rod 37 is suspended in the pressure regulating chamber 25, and the other end extends out of the valve housing 14, and extends out of the valve housing 14. Part of it is set in a glass tube 38 (see FIG. 5 ), and the glass tube 38 is affixed to the surface of the valve housing 14 . The proportional controller is arranged in the controller housing 39, and the built-in pressure sensor 16 is a HT19 silicon piezoresistive sensor, which is used to measure the air pressure in the pressure regulating chamber 25 and convert the detected pressure value into a voltage signal. Its core It is a highly stable diffused silicon element. Its working principle is to transmit the differential pressure of the measured medium to the silicon bridge plate through the isolation diaphragm and silicone oil, and use the piezoresistive effect principle of diffused silicon to measure the air pressure. It is powered by a 5V power supply. .

There are two problems in the use of the control valve: (1) During the process of decompression and expansion, the air cools down rapidly and the water is precipitated rapidly, so the dew condensation and freezing phenomenon in the pressure regulating chamber are serious, which greatly affects the performance and performance of the components. (2) For the control valve using proportional electromagnet, in the process of maintaining the output pressure, the proportional electromagnet needs to continue to consume electric energy, which increases the power consumption of the control valve and causes the coil 23 to heat up more than other Valves are serious. Therefore as shown in Figures 2 and 5, a heat radiation-heating system has also been designed, which includes an annular heat dissipation space 40, an annular heating space 41, an air collecting box 42 and a main heat dissipation body 43, and the annular heat dissipation space 40 is surrounded by the heat radiation that accommodates the coil 23. Outside the groove wall 44, one end of the annular heat dissipation space 40 is connected with the gas collecting box 42, and the other end is connected with the outlet of the main cooling body 43. The gas collecting box 45 is integrated on the lower surface of the valve housing 14, and the gas collecting box 45 is set The reason for the low point is that it is convenient to drain the accumulated water in the heat exchange loop by opening the drain valve 51 arranged at the bottom of the gas collection box 45, so as to ensure the efficiency of heat exchange and reduce the corrosion of the heat exchange surface. The annular heating space 41 surrounds the outside of the heating tank wall 45 of the pressure regulating chamber 25. One end of the annular heating space 41 communicates with the gas collecting box 42, and the other end communicates with the entrance of the main radiator 43 (because of the viewing angle, Fig. 2 The communication interface between the annular heat dissipation space 40 and the annular heating space 41 is not shown), in order to ensure heat transfer efficiency, the heat dissipation groove wall 44 and the heating groove wall 45 are made of aluminum alloy with a thickness of 8mm. The main cooling body 43 is integrated on the upper surface of the controller housing 39, including a plurality of horizontally arranged small-diameter heat dissipation pipes 46 and two vertically arranged hollow supports 47, and the small-diameter heat dissipation pipes 46 and the hollow support bodies 47 are integrally formed and interconnected. The bottom of the pipeline of the air inlet 28 is also connected with a power pipe 48 to the gas collection box 42 , and a pressure reducing valve 49 is arranged on the power pipe 48 . One-way check valves 50 are arranged on the pipelines from the annular heat dissipation space 40 to the gas collection box 42, and from the gas collection box 42 to the annular heating space 41, and the installation directions are respectively directed from the annular heat dissipation space 40 to the gas collection box 42, and from the gas collection box 42 to the gas collection box 42. The air box 43 points to the annular heating space 44 and is used to ensure that the air in the heat exchange loop flows in a predetermined direction. When the control valve 4 is working, the annular heat dissipation space 40, the annular heating space 41, the gas collecting box 42 and the main heat dissipation body 43 together form a heat exchange loop, which circulates under the pressure of the air in the power pipe 48, and the heat of the coil 23 The air transferred to the annular heat dissipation space 40 through the heat dissipation groove wall 44, and then enters the gas collecting box 42 and the annular heating space 41 in turn, and in the annular heating space 41, the heat is transferred to the pressure regulating chamber 25 through the heating wall groove 45 to heat the regulating chamber. The air in the pressure chamber 25 is used to increase the temperature of the decompressed air in the pressure regulating chamber 25 to make it higher than the dew point temperature of the moisture in the air to reduce frosting; the heated air continues to be driven to the main radiator 43, In the main heat dissipation body 43 , excess heat is transferred to the ambient air through a plurality of small-diameter heat dissipation pipes 46 , and the air cooled by the main heat dissipation body 43 enters the annular heat dissipation space 40 again, thus completing a thermodynamic cycle. The pressure reducing valve 49 is used to regulate the flow velocity of the heat exchange loop, and then controls the temperature of the coil 23 and the temperature of the air in the pressure regulating chamber 25. When the operator observes that the silica gel rod 37 in the glass tube 38 changes from blue to red ( When showing that the silica gel rod 37 absorbs more water), manually open the opening degree of the large pressure reducing valve 49 to improve the temperature of the air in the pressure regulating chamber 25.

As shown in FIG. 6 , the proportional controller 16 includes a single-chip microcomputer 52 , a power drive module 53 and a power supply module 54 , wherein the single-chip microcomputer 52 is connected to the power drive module 53 , and the power drive module 53 is used to supply power to the coil 23 to drive the armature 22 to move. As shown in Figure 7, the power supply module 54 is used to supply power to the power drive module 53. The power supply module 54 includes a directional diode 55, a current limiting resistor 56 and a π-type LC filter connected in sequence, and the directional diode 55 is used to avoid reverse connection of the power supply. For damage to the circuit, the current limiting resistor 56 includes two parallel protection resistors with a power of 0.25W and a resistance value of 1Ω, which are used to prevent the short circuit of the coil 23 from burning the circuit board, and the π-type LC filter is used to weaken the ripple noise in the circuit. It includes 2 capacitors 57 and 1 inductor 58 . Two bypass capacitors 59 are connected in parallel in front of the direction diode 55, and a transient voltage suppression diode 60 is connected in parallel between the current limiting resistor 56 and the π-type LC filter to suppress voltage peaks in the circuit. The output end of the power module 54 is also used as a backup power supply for the built-in pressure sensor 15 , which is connected to the built-in pressure sensor 15 through a relay 61 and a step-down transformer 62 . The normal operating power supply 64 of the built-in pressure sensor 15 (obtained by the simple step-down of the mains power) is provided with a power detector 63, when the power detector 63 (the prior art, the power detector that can detect the power signal on the market can be used) ) When detecting that the normal working power supply 64 is de-energized, the level signal is sent to the relay 61, and the relay 61 is pulled in under the action of the level signal to connect the circuit from the power module 54 to the step-down transformer 62 to supply power to the built-in pressure sensor 15. The advantage of this power supply method is that in the prior art, the normal working power supply of the built-in pressure sensor 15 is often integrated in the power supply module 54, but in fact the built-in pressure sensor 15 does not have high quality requirements for the power supply, so the normal working power supply 64 can use the power supply that has not been processed by the power supply module 54, and only when the normal working power supply 64 loses power, it automatically switches to the power supply module 54 for power supply through the relay 61, which can reduce the power consumption of components such as the current limiting resistor 56, and play a saving control The role of valve operation power consumption, but also improve the safety of the system work. Other parts not involved in the proportional controller 16 can be realized by existing technology, so this embodiment will not describe in detail.

In this embodiment, 1. Drying is carried out by means of pneumatic control and solar heating, with precise control, clean energy, and simple and practical structure; 2. A new control valve is designed with a simple and reasonable structure, which can realize air supply pressure Accurate control, re-arrangement of the sealing of its components, and the use of new material polymer composite nylon layer 36 to replace the existing friction surface material, greatly improving the service life of the control valve and effectively reducing the main joint When the flow port 35 is opened, the air leaked from the overflow port 35 into the exhaust port 30 is bypassed from the worn part; 3, a heat dissipation-heating system is designed, and the heat generated by the coil 23 is used to heat the pressure regulating chamber 25, and at the same time solve the problem of It solves the two problems of dew condensation and freezing in the pressure regulating chamber 25 and heating of the coil 23 during the decompression and expansion process of the air, and through this hollow heat dissipation and heating space structure, the use of expensive main valve materials can be reduced, which helps to save Cost and light weight, the cooling tank wall 44 and the heating tank wall 45 are made of aluminum alloy, and the thickness is 8mm, the maintenance period of the control valve is extended by 40% compared with that before the improvement; 4. Through the setting of the silicone rod 37, the operator Can judge the air moisture level in the pressure regulating chamber 25 by observing the state of the silica gel rod 37 in the glass tube 38, and use this as a basis to manually open the opening degree of the pressure reducing valve 49 to improve the temperature of the air in the pressure regulating chamber 25, which in turn Further suppress the occurrence of frosting and icing; 5, designed a new power supply module 54, which has the advantages of high power supply quality, obvious anti-error current limiting effect, and through the design of components such as relay 61 and power detector 63, effective The power consumption of components such as the current-limiting resistor 56 is reduced, which plays a role in saving the operating power consumption of the control valve, and at the same time improves the safety of the system work.

Embodiment 4:

A kind of solar energy central drying device as shown in Figure 1, comprises the drying oven 1, air compressor 2, air tank 3, control valve 4, heat exchanger 5 and solar heat collecting plate 6 connected successively; The upper part of the oven 1 is provided with an air inlet tray 7, and the air inlet tray 7 is provided with a plurality of air inlet holes 8, and the lower part of the oven 1 is provided with an air outlet tray 9, and the air outlet tray 9 is provided with a plurality of air outlet holes 10; The machine 2 compresses the air and sends it to the air tank 3, then sends it to the heat exchanger 5 through the control valve 4 for heating, and then enters the drying space 11 between the air inlet disk 7 and the air outlet disk 9 through the air inlet disk 7. drying; the air coming out of the air outlet tray 9 returns to the inlet of the air compressor 2 for compression; The air compressor 2 is a centrifugal air compressor 2 . The heat exchanger 5 adopts tubular heat exchange, air is passed through the pipe, and water is passed between the pipe and the shell of the heat exchanger.

As shown in FIG. 2 , the control valve 4 includes a valve housing 14 , a controller housing 39 , a main valve, a built-in pressure sensor 15 , a proportional solenoid, a proportional controller 16 and a cooling-heating system. The main valve is installed in the valve casing 14, which is a two-position three-way valve, including an end cover 17, a piston 18, a tail cover 19, a feedback spring 20 and a valve body 21, the feedback spring 20 is sleeved on the tail cover 19, and the piston 18 It is threaded connection with the tail cap 19. The proportional electromagnet includes an armature 22 and a coil 23 , the left end of the armature 22 is fixedly connected with a thrust rod 24 , the end cap 17 is screwed on the thrust rod 24 , the piston 18 and the end cap 17 are both arranged in the valve body 21 .

As shown in FIGS. 3-5 , the chamber where the feedback spring 20 is located is called a pressure regulating chamber 25 , and the pressure regulating chamber 25 is connected with an output port 26 . An air intake chamber 27 is formed between the valve body 21 and the concave portion of the piston 18 , and the air intake chamber 27 communicates with an air inlet 28 . The chamber where the tail cover 19 is located is called an exhaust chamber 29, and the exhaust chamber 29 communicates with an exhaust port 30, and the exhaust port 30 communicates with the atmosphere. The output port 26 supplies air to the outside, and the air inlet 28 , the output port 26 and the exhaust port 30 communicate with the outside through the guide plate 31 configured for the valve body 21 . The left end of the valve body 21 is provided with a first boss 32 , and the first boss 32 and the right side of the tail cap 19 form a main throttle opening 33 . The right end of the piston 18 is provided with a second boss 34 , and the second boss 34 and the left side of the end cover 17 form an overflow port 35 . The left side of the end cover 17 is also provided with a sealing ring groove (not shown in the figure), and the sealing ring groove is used to cooperate with the second boss 34 to prevent the overflow port 35 from leaking when the overflow port 35 is closed. The surface of the ring groove is laid with a layer of rubber, and the right side of the tail cover 19 is inlaid with a rubber sealing ring. Figure 3 and Figure 4 respectively show the air flow diagrams in the decompression state and the overflow state: when the feedback pressure detected by the built-in pressure sensor 15 is less than the set pressure, the proportional controller 16 increases the output current of the coil 23, The thrust of the thrust rod 24 increases, and the opening of the main throttle port 33 increases, so that the output pressure of the output port 26 increases, and the control valve 4 works in a decompression state; on the contrary, when the detected feedback pressure is greater than the set pressure , the proportional controller 16 reduces the output current, the thrust of the thrust rod 24 decreases, the main throttle port 33 is closed, the overflow port 35 is opened, the air in the pressure regulating chamber 25 is discharged to the atmosphere through the overflow port 35, and the output port 26 The pressure is reduced, and the control valve 4 works in the overflow state.

The inventors have found through research that during the frequent action of the control valve, the contact surface between the piston 18 and the valve body 21 is prone to wear, and in the long run, part of the air will bypass the worn part when the main throttle port 33 is opened. The overflow port 35 leaks into the exhaust port 30, which is very unfavorable for the precise control of the control valve, so the outer surface of the piston 18 is provided with a layer of polymer composite nylon layer 36, which is made of binary Amine and dibasic acid are produced by polycondensation, and epoxy resin and glass fiber are added in the polycondensation process. The wear resistance coefficient of the material is 2-3 times that of 30# steel, and the wear resistance is 1.5 times that of 30# steel. , The shear strength is 30-40MPa, and the fatigue resistance is outstanding, which greatly reduces the wear and prolongs the service life of the valve core. The pressure regulating chamber 25 is also provided with a silica gel rod 37 for detecting air moisture in the valve. One end of the silica gel rod 37 is suspended in the pressure regulating chamber 25, and the other end extends out of the valve housing 14, and extends out of the valve housing 14. Part of it is set in a glass tube 38 (see FIG. 5 ), and the glass tube 38 is affixed to the surface of the valve housing 14 . The proportional controller is arranged in the controller housing 39, and the built-in pressure sensor 16 is a HT19 silicon piezoresistive sensor, which is used to measure the air pressure in the pressure regulating chamber 25 and convert the detected pressure value into a voltage signal. Its core It is a highly stable diffused silicon element. Its working principle is to transmit the differential pressure of the measured medium to the silicon bridge plate through the isolation diaphragm and silicone oil, and use the piezoresistive effect principle of diffused silicon to measure the air pressure. It is powered by a 5V power supply. .

There are two problems in the use of the control valve: (1) During the process of decompression and expansion, the air cools down rapidly and the water is precipitated rapidly, so the dew condensation and freezing phenomenon in the pressure regulating chamber are serious, which greatly affects the performance and performance of the components. (2) For the control valve using proportional electromagnet, in the process of maintaining the output pressure, the proportional electromagnet needs to continue to consume electric energy, which increases the power consumption of the control valve and causes the coil 23 to heat up more than other Valves are serious. Therefore as shown in Figures 2 and 5, a heat radiation-heating system has also been designed, which includes an annular heat dissipation space 40, an annular heating space 41, an air collecting box 42 and a main heat dissipation body 43, and the annular heat dissipation space 40 is surrounded by the heat radiation that accommodates the coil 23. Outside the groove wall 44, one end of the annular heat dissipation space 40 is connected with the gas collecting box 42, and the other end is connected with the outlet of the main cooling body 43. The gas collecting box 45 is integrated on the lower surface of the valve housing 14, and the gas collecting box 45 is set The reason for the low point is that it is convenient to drain the accumulated water in the heat exchange loop by opening the drain valve 51 arranged at the bottom of the gas collection box 45, so as to ensure the efficiency of heat exchange and reduce the corrosion of the heat exchange surface. The annular heating space 41 surrounds the outside of the heating tank wall 45 of the pressure regulating chamber 25. One end of the annular heating space 41 communicates with the gas collecting box 42, and the other end communicates with the entrance of the main radiator 43 (because of the viewing angle, Fig. 2 The communication interface between the annular heat dissipation space 40 and the annular heating space 41 is not shown), in order to ensure heat transfer efficiency, the heat dissipation groove wall 44 and the heating groove wall 45 are made of aluminum alloy with a thickness of 7 mm. The main cooling body 43 is integrated on the upper surface of the controller housing 39, including a plurality of horizontally arranged small-diameter heat dissipation pipes 46 and two vertically arranged hollow supports 47, and the small-diameter heat dissipation pipes 46 and the hollow support bodies 47 are integrally formed and interconnected. The bottom of the pipeline of the air inlet 28 is also connected with a power pipe 48 to the gas collection box 42 , and a pressure reducing valve 49 is arranged on the power pipe 48 . One-way check valves 50 are arranged on the pipelines from the annular heat dissipation space 40 to the gas collection box 42, and from the gas collection box 42 to the annular heating space 41, and the installation directions are respectively directed from the annular heat dissipation space 40 to the gas collection box 42, and from the gas collection box 42 to the gas collection box 42. The air box 43 points to the annular heating space 44 and is used to ensure that the air in the heat exchange loop flows in a predetermined direction. When the control valve 4 is working, the annular heat dissipation space 40, the annular heating space 41, the gas collecting box 42 and the main heat dissipation body 43 together form a heat exchange loop, which circulates under the pressure of the air in the power pipe 48, and the heat of the coil 23 The air transferred to the annular heat dissipation space 40 through the heat dissipation groove wall 44, and then enters the gas collecting box 42 and the annular heating space 41 in turn, and in the annular heating space 41, the heat is transferred to the pressure regulating chamber 25 through the heating wall groove 45 to heat the regulating chamber. The air in the pressure chamber 25 is used to increase the temperature of the decompressed air in the pressure regulating chamber 25 to make it higher than the dew point temperature of the moisture in the air to reduce frosting; the heated air continues to be driven to the main radiator 43, In the main heat dissipation body 43 , excess heat is transferred to the ambient air through a plurality of small-diameter heat dissipation pipes 46 , and the air cooled by the main heat dissipation body 43 enters the annular heat dissipation space 40 again, thus completing a thermodynamic cycle. The pressure reducing valve 49 is used to regulate the flow velocity of the heat exchange loop, and then controls the temperature of the coil 23 and the temperature of the air in the pressure regulating chamber 25. When the operator observes that the silica gel rod 37 in the glass tube 38 changes from blue to red ( When showing that the silica gel rod 37 absorbs more water), manually open the opening degree of the large pressure reducing valve 49 to improve the temperature of the air in the pressure regulating chamber 25.

As shown in FIG. 6 , the proportional controller 16 includes a single-chip microcomputer 52 , a power drive module 53 and a power supply module 54 , wherein the single-chip microcomputer 52 is connected to the power drive module 53 , and the power drive module 53 is used to supply power to the coil 23 to drive the armature 22 to move. As shown in Figure 7, the power supply module 54 is used to supply power to the power drive module 53. The power supply module 54 includes a directional diode 55, a current limiting resistor 56 and a π-type LC filter connected in sequence, and the directional diode 55 is used to avoid reverse connection of the power supply. For damage to the circuit, the current limiting resistor 56 includes two parallel protection resistors with a power of 0.25W and a resistance value of 1Ω, which are used to prevent the short circuit of the coil 23 from burning the circuit board, and the π-type LC filter is used to weaken the ripple noise in the circuit. It includes 2 capacitors 57 and 1 inductor 58 . Two bypass capacitors 59 are connected in parallel in front of the direction diode 55, and a transient voltage suppression diode 60 is connected in parallel between the current limiting resistor 56 and the π-type LC filter to suppress voltage peaks in the circuit. The output end of the power module 54 is also used as a backup power supply for the built-in pressure sensor 15 , which is connected to the built-in pressure sensor 15 through a relay 61 and a step-down transformer 62 . The normal operating power supply 64 of the built-in pressure sensor 15 (obtained by the simple step-down of the mains power) is provided with a power detector 63, when the power detector 63 (the prior art, the power detector that can detect the power signal on the market can be used) ) When detecting that the normal working power supply 64 is de-energized, the level signal is sent to the relay 61, and the relay 61 is pulled in under the action of the level signal to connect the circuit from the power module 54 to the step-down transformer 62 to supply power to the built-in pressure sensor 15. The advantage of this power supply method is that in the prior art, the normal working power supply of the built-in pressure sensor 15 is often integrated in the power supply module 54, but in fact the built-in pressure sensor 15 does not have high quality requirements for the power supply, so the normal working power supply 64 can use the power supply that has not been processed by the power supply module 54, and only when the normal working power supply 64 loses power, it automatically switches to the power supply module 54 for power supply through the relay 61, which can reduce the power consumption of components such as the current limiting resistor 56, and play a saving control The role of valve operation power consumption, but also improve the safety of the system work. Other parts not involved in the proportional controller 16 can be realized by existing technology, so this embodiment will not describe in detail.

In the rotatable camera device of this embodiment, 1. Drying is carried out by means of pneumatic control and solar heating, with precise control, clean energy, and simple and practical structure; 2. A new control valve is designed with a simple and reasonable structure , can realize the accurate control of the air supply pressure, and re-layout the sealing of its parts, and use the new material polymer composite nylon layer 36 to replace the existing friction surface material, so that the service life of the control valve is greatly improved , effectively reducing the air that leaks into the exhaust port 30 from the overflow port 35 bypassing the worn part when the main throttle port 35 is opened; The pressure chamber 25 solves the two problems of dew condensation and freezing in the pressure regulating chamber 25 and heating of the coil 23 during the decompression and expansion process of the air, and through this hollow heat dissipation and heating space structure, the cost of expensive main valve materials can be reduced. Use, help to save cost and light weight, the cooling tank wall 44 and the heating tank wall 45 are made of aluminum alloy, and the thickness is 7mm, the maintenance cycle of the control valve is extended by 45% compared with the unimproved one; 4. Through the silica gel rod 37, the operator can judge the moisture level of the air in the pressure regulating chamber 25 by observing the state of the silica gel rod 37 in the glass tube 38, and use this as a basis to manually open the opening of the pressure reducing valve 49 to increase the moisture level in the pressure regulating chamber 25. 5. A new power module 54 has been designed, which has the advantages of high power supply quality, obvious anti-false current limiting effect, and through relay 61, power detector 63 The design of other parts effectively reduces the power consumption of components such as the current-limiting resistor 56, plays a role in saving the operating power consumption of the control valve, and also improves the safety of the system work.

Example 5:

A kind of solar energy central drying device as shown in Figure 1, comprises the drying oven 1, air compressor 2, air tank 3, control valve 4, heat exchanger 5 and solar heat collecting plate 6 connected successively; The upper part of the oven 1 is provided with an air inlet tray 7, and the air inlet tray 7 is provided with a plurality of air inlet holes 8, and the lower part of the oven 1 is provided with an air outlet tray 9, and the air outlet tray 9 is provided with a plurality of air outlet holes 10; The machine 2 compresses the air and sends it to the air tank 3, then sends it to the heat exchanger 5 through the control valve 4 for heating, and then enters the drying space 11 between the air inlet disk 7 and the air outlet disk 9 through the air inlet disk 7. drying; the air coming out of the air outlet tray 9 returns to the inlet of the air compressor 2 for compression; The air compressor 2 is a centrifugal air compressor 2 . The heat exchanger 5 adopts tubular heat exchange, air is passed through the pipe, and water is passed between the pipe and the shell of the heat exchanger.

As shown in FIG. 2 , the control valve 4 includes a valve housing 14 , a controller housing 39 , a main valve, a built-in pressure sensor 15 , a proportional solenoid, a proportional controller 16 and a cooling-heating system. The main valve is installed in the valve casing 14, which is a two-position three-way valve, including an end cover 17, a piston 18, a tail cover 19, a feedback spring 20 and a valve body 21, the feedback spring 20 is sleeved on the tail cover 19, and the piston 18 It is threaded connection with the tail cap 19. The proportional electromagnet includes an armature 22 and a coil 23 , the left end of the armature 22 is fixedly connected with a thrust rod 24 , the end cap 17 is screwed on the thrust rod 24 , the piston 18 and the end cap 17 are both arranged in the valve body 21 .

As shown in FIGS. 3-5 , the chamber where the feedback spring 20 is located is called a pressure regulating chamber 25 , and the pressure regulating chamber 25 is connected with an output port 26 . An air intake chamber 27 is formed between the valve body 21 and the concave portion of the piston 18 , and the air intake chamber 27 communicates with an air inlet 28 . The chamber where the tail cover 19 is located is called an exhaust chamber 29, and the exhaust chamber 29 communicates with an exhaust port 30, and the exhaust port 30 communicates with the atmosphere. The output port 26 supplies air to the outside, and the air inlet 28 , the output port 26 and the exhaust port 30 communicate with the outside through the guide plate 31 configured for the valve body 21 . The left end of the valve body 21 is provided with a first boss 32 , and the first boss 32 and the right side of the tail cap 19 form a main throttle opening 33 . The right end of the piston 18 is provided with a second boss 34 , and the second boss 34 and the left side of the end cover 17 form an overflow port 35 . The left side of the end cover 17 is also provided with a sealing ring groove (not shown in the figure), and the sealing ring groove is used to cooperate with the second boss 34 to prevent the overflow port 35 from leaking when the overflow port 35 is closed. The surface of the ring groove is laid with a layer of rubber, and the right side of the tail cover 19 is inlaid with a rubber sealing ring. Figure 3 and Figure 4 respectively show the air flow diagrams in the decompression state and the overflow state: when the feedback pressure detected by the built-in pressure sensor 15 is less than the set pressure, the proportional controller 16 increases the output current of the coil 23, The thrust of the thrust rod 24 increases, and the opening of the main throttle port 33 increases, so that the output pressure of the output port 26 increases, and the control valve 4 works in a decompression state; on the contrary, when the detected feedback pressure is greater than the set pressure , the proportional controller 16 reduces the output current, the thrust of the thrust rod 24 decreases, the main throttle port 33 is closed, the overflow port 35 is opened, the air in the pressure regulating chamber 25 is discharged to the atmosphere through the overflow port 35, and the output port 26 The pressure is reduced, and the control valve 4 works in the overflow state.

The inventors have found through research that during the frequent action of the control valve, the contact surface between the piston 18 and the valve body 21 is prone to wear, and in the long run, part of the air will bypass the worn part when the main throttle port 33 is opened. The overflow port 35 leaks into the exhaust port 30, which is very unfavorable for the precise control of the control valve, so the outer surface of the piston 18 is provided with a layer of polymer composite nylon layer 36, which is made of binary Amine and dibasic acid are produced by polycondensation, and epoxy resin and glass fiber are added in the polycondensation process. The wear resistance coefficient of the material is 2-3 times that of 30# steel, and the wear resistance is 1.5 times that of 30# steel. , The shear strength is 30-40MPa, and the fatigue resistance is outstanding, which greatly reduces the wear and prolongs the service life of the valve core. The pressure regulating chamber 25 is also provided with a silica gel rod 37 for detecting air moisture in the valve. One end of the silica gel rod 37 is suspended in the pressure regulating chamber 25, and the other end extends out of the valve housing 14, and extends out of the valve housing 14. Part of it is set in a glass tube 38 (see FIG. 5 ), and the glass tube 38 is affixed to the surface of the valve housing 14 . The proportional controller is arranged in the controller housing 39, and the built-in pressure sensor 16 is a HT19 silicon piezoresistive sensor, which is used to measure the air pressure in the pressure regulating chamber 25 and convert the detected pressure value into a voltage signal. Its core It is a highly stable diffused silicon element. Its working principle is to transmit the differential pressure of the measured medium to the silicon bridge plate through the isolation diaphragm and silicone oil, and use the piezoresistive effect principle of diffused silicon to measure the air pressure. It is powered by a 5V power supply. .

There are two problems in the use of the control valve: (1) During the process of decompression and expansion, the air cools down rapidly and the water is precipitated rapidly, so the dew condensation and freezing phenomenon in the pressure regulating chamber are serious, which greatly affects the performance and performance of the components. (2) For the control valve using proportional electromagnet, in the process of maintaining the output pressure, the proportional electromagnet needs to continue to consume electric energy, which increases the power consumption of the control valve and causes the coil 23 to heat up more than other Valves are serious. Therefore as shown in Figures 2 and 5, a heat radiation-heating system has also been designed, which includes an annular heat dissipation space 40, an annular heating space 41, an air collecting box 42 and a main heat dissipation body 43, and the annular heat dissipation space 40 is surrounded by the heat radiation that accommodates the coil 23. Outside the groove wall 44, one end of the annular heat dissipation space 40 is connected with the gas collecting box 42, and the other end is connected with the outlet of the main cooling body 43. The gas collecting box 45 is integrated on the lower surface of the valve housing 14, and the gas collecting box 45 is set The reason for the low point is that it is convenient to drain the accumulated water in the heat exchange loop by opening the drain valve 51 arranged at the bottom of the gas collection box 45, so as to ensure the efficiency of heat exchange and reduce the corrosion of the heat exchange surface. The annular heating space 41 surrounds the outside of the heating tank wall 45 of the pressure regulating chamber 25. One end of the annular heating space 41 communicates with the gas collecting box 42, and the other end communicates with the entrance of the main radiator 43 (because of the viewing angle, Fig. 2 The communication interface between the annular heat dissipation space 40 and the annular heating space 41 is not shown), in order to ensure heat transfer efficiency, the heat dissipation groove wall 44 and the heating groove wall 45 are made of aluminum alloy with a thickness of 6mm. The main cooling body 43 is integrated on the upper surface of the controller housing 39, including a plurality of horizontally arranged small-diameter heat dissipation pipes 46 and two vertically arranged hollow supports 47, and the small-diameter heat dissipation pipes 46 and the hollow support bodies 47 are integrally formed and interconnected. The bottom of the pipeline of the air inlet 28 is also connected with a power pipe 48 to the gas collection box 42 , and a pressure reducing valve 49 is arranged on the power pipe 48 . One-way check valves 50 are arranged on the pipelines from the annular heat dissipation space 40 to the gas collection box 42, and from the gas collection box 42 to the annular heating space 41, and the installation directions are respectively directed from the annular heat dissipation space 40 to the gas collection box 42, and from the gas collection box 42 to the gas collection box 42. The air box 43 points to the annular heating space 44 and is used to ensure that the air in the heat exchange loop flows in a predetermined direction. When the control valve 4 is working, the annular heat dissipation space 40, the annular heating space 41, the gas collecting box 42 and the main heat dissipation body 43 together form a heat exchange loop, which circulates under the pressure of the air in the power pipe 48, and the heat of the coil 23 The air transferred to the annular heat dissipation space 40 through the heat dissipation groove wall 44, and then enters the gas collecting box 42 and the annular heating space 41 in turn, and in the annular heating space 41, the heat is transferred to the pressure regulating chamber 25 through the heating wall groove 45 to heat the regulating chamber. The air in the pressure chamber 25 is used to increase the temperature of the decompressed air in the pressure regulating chamber 25 to make it higher than the dew point temperature of the moisture in the air to reduce frosting; the heated air continues to be driven to the main radiator 43, In the main heat dissipation body 43 , excess heat is transferred to the ambient air through a plurality of small-diameter heat dissipation pipes 46 , and the air cooled by the main heat dissipation body 43 enters the annular heat dissipation space 40 again, thus completing a thermodynamic cycle. The pressure reducing valve 49 is used to regulate the flow velocity of the heat exchange loop, and then controls the temperature of the coil 23 and the temperature of the air in the pressure regulating chamber 25. When the operator observes that the silica gel rod 37 in the glass tube 38 changes from blue to red ( When showing that the silica gel rod 37 absorbs more water), manually open the opening degree of the large pressure reducing valve 49 to improve the temperature of the air in the pressure regulating chamber 25.

As shown in FIG. 6 , the proportional controller 16 includes a single-chip microcomputer 52 , a power drive module 53 and a power supply module 54 , wherein the single-chip microcomputer 52 is connected to the power drive module 53 , and the power drive module 53 is used to supply power to the coil 23 to drive the armature 22 to move. As shown in Figure 7, the power supply module 54 is used to supply power to the power drive module 53. The power supply module 54 includes a directional diode 55, a current limiting resistor 56 and a π-type LC filter connected in sequence, and the directional diode 55 is used to avoid reverse connection of the power supply. For damage to the circuit, the current limiting resistor 56 includes two parallel protection resistors with a power of 0.25W and a resistance value of 1Ω, which are used to prevent the short circuit of the coil 23 from burning the circuit board, and the π-type LC filter is used to weaken the ripple noise in the circuit. It includes 2 capacitors 57 and 1 inductor 58 . Two bypass capacitors 59 are connected in parallel in front of the direction diode 55, and a transient voltage suppression diode 60 is connected in parallel between the current limiting resistor 56 and the π-type LC filter to suppress voltage peaks in the circuit. The output end of the power module 54 is also used as a backup power supply for the built-in pressure sensor 15 , which is connected to the built-in pressure sensor 15 through a relay 61 and a step-down transformer 62 . The normal operating power supply 64 of the built-in pressure sensor 15 (obtained by the simple step-down of the mains power) is provided with a power detector 63, when the power detector 63 (the prior art, the power detector that can detect the power signal on the market can be used) ) When detecting that the normal working power supply 64 is de-energized, the level signal is sent to the relay 61, and the relay 61 is pulled in under the action of the level signal to connect the circuit from the power module 54 to the step-down transformer 62 to supply power to the built-in pressure sensor 15. The advantage of this power supply method is that in the prior art, the normal working power supply of the built-in pressure sensor 15 is often integrated in the power supply module 54, but in fact the built-in pressure sensor 15 does not have high quality requirements for the power supply, so the normal working power supply 64 can use the power supply that has not been processed by the power supply module 54, and only when the normal working power supply 64 loses power, it automatically switches to the power supply module 54 for power supply through the relay 61, which can reduce the power consumption of components such as the current limiting resistor 56, and play a saving control The role of valve operation power consumption, but also improve the safety of the system work. Other parts not involved in the proportional controller 16 can be realized by existing technology, so this embodiment will not describe in detail.

In this embodiment, 1. Drying is carried out by means of pneumatic control and solar heating, with precise control, clean energy, and simple and practical structure; 2. A new control valve is designed with a simple and reasonable structure, which can realize air supply pressure Accurate control, re-arrangement of the sealing of its components, and the use of new material polymer composite nylon layer 36 to replace the existing friction surface material, greatly improving the service life of the control valve and effectively reducing the main joint When the flow port 35 is opened, the air leaked from the overflow port 35 into the exhaust port 30 is bypassed from the worn part; 3, a heat dissipation-heating system is designed, and the heat generated by the coil 23 is used to heat the pressure regulating chamber 25, and at the same time solve the problem of It solves the two problems of dew condensation and freezing in the pressure regulating chamber 25 and heating of the coil 23 during the decompression and expansion process of the air, and through this hollow heat dissipation and heating space structure, the use of expensive main valve materials can be reduced, which helps to save Cost and light weight, the heat dissipation tank wall 44 and the heating tank wall 45 are made of aluminum alloy, and the thickness is 6mm, the control valve maintenance cycle is extended by 50% compared with that before the improvement; 4. Through the setting of the silicone rod 37, the operator Can judge the air moisture level in the pressure regulating chamber 25 by observing the state of the silica gel rod 37 in the glass tube 38, and use this as a basis to manually open the opening degree of the pressure reducing valve 49 to improve the temperature of the air in the pressure regulating chamber 25, which in turn Further suppress the occurrence of frosting and icing; 5, designed a new power supply module 54, which has the advantages of high power supply quality, obvious anti-error current limiting effect, and through the design of components such as relay 61 and power detector 63, effective The power consumption of components such as the current-limiting resistor 56 is reduced, which plays a role in saving the operating power consumption of the control valve, and at the same time improves the safety of the system work.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand , the technical solution of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

Claims (5)

1. solar energy central dry an apparatus of laundry, it is characterized in that, including the clothes-drying box being sequentially connected, air compressor, air tank, Control valve, heat exchanger and solar heat-collection plate；The top of clothes-drying box is provided with air inlet disk, and air inlet disk is provided with multiple air inlet, The bottom of clothes-drying box is provided with dish of giving vent to anger, and dish of giving vent to anger is provided with multiple venthole；Air compressor is delivered to after being compressed by air Air tank, is then delivered to heat exchanger by control valve and heats, and is entered air inlet disk by air inlet disk subsequently and gives vent to anger between dish Dry clothing space clothes is dried；The entrance returning to air compressor from dish air out of giving vent to anger is compressed；The described sun Can arrange on heat exchangers by collecting plate, for providing heating heat for heat exchanger.

A kind of solar energy central the most according to claim 1 dries apparatus of laundry, it is characterized in that, described air compressor is centrifugal Formula air compressor.

A kind of solar energy central the most according to claim 2 dries apparatus of laundry, it is characterized in that, described heat exchanger uses tubular type to change Heat, blowing air in pipeline, it is passed through water between pipeline and heat exchanger shell.

A kind of solar energy central the most according to claim 3 dries apparatus of laundry, it is characterized in that, described control valve include valve casing, Controller housing, main valve, built in pressure sensor, proportion electro-magnet, proportional controller and heat radiation-heating system；Described main valve Being arranged in valve casing, it is two-position three-way valve, and main valve includes end cap, piston, tail-hood, feedback spring and valve body, feedback spring It is socketed on tail-hood, for threadeding between piston with described tail-hood；Described proportion electro-magnet includes armature and coil, armature Left end is connected with distance rod, and described end cap is threaded on distance rod, and described piston and end cap are arranged in valve body；

The chamber at feedback spring place is referred to as pressure regulating cavity, and pressure regulating cavity is communicated with delivery outlet；The depressed part of described valve body and piston divides it Between constitute inlet chamber, inlet chamber is communicated with air inlet；The chamber at described tail-hood place is referred to as discharge chamber, and discharge chamber is communicated with aerofluxus Mouthful, air vent connection air；Described delivery outlet outwards supplies, and air inlet, delivery outlet and air vent are by manufacturing for valve body Deflector and ft connection；The left end of valve body is provided with the first boss, and the first boss constitutes primary choke with the right flank of tail-hood； The right-hand member of piston is provided with the second boss, and the second boss constitutes overfall with the left surface of end cap；Also set up on the left surface of end cap Having closure gasket groove, described closure gasket groove prevents overfall from leaking gas for coordinating with the second boss when overfall is closed, closure gasket groove Surface on be laid with one layer of rubber layer, at the right flank of tail-hood in stud with rubber seal；Arrange on the outer surface of described piston Having a floor height molecule composite nylon layer, this macromolecule composite nylon layer is prepared by polycondensation with binary acid by diamine, and in polycondensation During be added with epoxy resin and glass fibre；The silica gel stick of air moisture in detecting valve, institute it is additionally provided with in pressure regulating cavity The one end stating silica gel stick is suspended in pressure regulating cavity, and the other end extends outside valve casing, and the part extended outside valve casing is sleeved on glass Guan Zhong, described glass tubing is fixed on the surface of valve casing；Described proportional controller is arranged in controller housing, and built-in pressure passes Sensor is HT19 type piezoresistive silicon sensor, for measuring the air pressure in pressure regulating cavity and the force value detected being converted to Voltage signal；

Described heat radiation-heating system includes circular radiating space, annular-heating space, collector box and main radiator, and circular radiating is empty Between be looped around outside the heat radiation cell wall accommodating coil, the one end in described circular radiating space is connected with collector box, and the other end is with main scattered The outlet of hot body is connected, and collector box is integrated in the lower surface of valve casing；Described annular-heating spatial loop is wound on adding of pressure regulating cavity Outside heat channel wall, the one end in annular-heating space is connected with collector box, and the other end is connected with the entrance of main radiator, radiating groove Wall and heating cell wall are made by aluminium alloy, and thickness is 10mm；Main radiator is integrated in the top table of described controller housing On face, including many horizontally disposed minor diameter radiating tubes and the hollow supporting body of 2 vertical layouts, described minor diameter radiating tube With hollow support body by integral forming being interconnected；The duct bottom of air inlet is also associated with power pipe to collector box, described power Air relief valve it is provided with on pipe；Circular radiating space to collector box, collector box to annular-heating space pipeline on be provided with list To non-return valve, its installation direction is pointed to collector box by circular radiating space, is pointed to annular-heating space by collector box respectively；Described During control valve work, circular radiating space, annular-heating space, collector box and main radiator collectively form a heat exchanger loop, Being circulated under the pressure-driven of power inner air tube, the heat of coil is delivered to the sky in circular radiating space by heat radiation cell wall In gas, then sequentially enter collector box and annular-heating space, transferred heat to by heating wall trench in annular-heating space Pressure regulating cavity is with the air in heating pressure regulating cavity, and in improving pressure regulating cavity, the air themperature through reducing pressure is to reduce frosting；After heating Air continues to be driven to main radiator, by many minor diameter radiating tubes, unnecessary heat is delivered to environment in main radiator In air, the air after main radiator is lowered the temperature is re-introduced into circular radiating space, so far completes a thermodynamic cycle；Described Air relief valve is for regulating the flow velocity of heat exchanger loop, and then the temperature of control coil and the temperature of pressure regulation chamber air, works as operator Observe silica gel stick in described glass tubing from blueness become redness time, manually open the aperture of big air relief valve with empty in improving pressure regulating cavity The temperature of gas；

Described proportional controller includes single-chip microcomputer, power driver module and power module, wherein single-chip microcomputer and power driver module phase Even, power driver module is used for coil power supply to drive armature motion；Power module is used for powering to power driver module, institute Stating direction diode, current-limiting resistance and π type LC wave filter that power module includes being sequentially connected, described direction diode is used for Avoid the reverse power connection infringement to circuit, described current-limiting resistance include 2 power in parallel be 0.25W, resistance be the guarantor of 1 Ω Protect resistance, be used for preventing coil short from burning circuit board；Described π type LC wave filter is used for weakening the Ripple Noise in circuit, It includes 2 capacitors and 1 inducer；2 bypass electric capacity the most in parallel, current-limiting resistance and π type before the diode of described direction 1 transient voltage suppressor, the voltage peak in suppression circuit also it is parallel with between LC wave filter；Described power supply mould The outfan of block is simultaneously as the stand-by power supply of built in pressure sensor, and it is by relay, step-down transformer and described built-in pressure Force transducer is connected；It is provided with Power supply detector, when Power supply detector is examined in the normal working power of described built in pressure sensor When measuring described normal working power dead electricity, transmission level signal to relay, relay under the effect of level signal adhesive from And module to the circuit of step-down transformer that switches on power is powered to built in pressure sensor.

A kind of solar energy central the most according to claim 4 dries apparatus of laundry, it is characterized in that, when built in pressure sensor detects The feedback pressure arrived is less than when setting pressure, and proportional controller increases the output electric current of coil, and the thrust of distance rod increases, main joint The aperture of head piece becomes big so that the output pressure of delivery outlet increases, and now control valve is operated in decompression state；On the contrary when detecting Feedback pressure more than when setting pressure, proportional controller reduces output electric current, and the thrust of distance rod reduces, and primary choke is closed, Overfall is opened, and the air in pressure regulating cavity is discharged to air by overfall, and the pressure of delivery outlet reduces, and now control valve is operated in Overflow situation.