A variable energy-saving control system for drying and dehumidifying machine

Abstract

The present invention is a variable energy-saving control system for a drying dehumidifier. The energy-saving control system is set to control the condensation system and the heating system inside the dryer, and the inhaled air is heated by the electric heating system and then dried. A detection system is set to detect the external environment to determine whether to condense the drawn air, and a plurality of heating chambers are set to determine how to heat the drawn air according to the temperature of the environment. The electric heating pipe group is initially controlled to be turned on or off by a control device, which solves the problem of high energy consumption and short service life of the electric heating pipe in the prior art that the electric heating pipe is operated by an on-off control structure, and the electric heating pipe is not frequently turned on and off to prevent damage.

Description

Technical Field

[0001] The present invention relates to the field of drying and dehumidification, and in particular to a variable energy-saving control system for a drying and dehumidifier. Background Art

[0002] There are several modes of drying machines, such as belt drying, drum drying, box drying, tower drying, etc.; the heat sources include coal, electricity, gas, etc.; the materials are dried in hot air flow and radiation mode, etc. The hot air drum drying is that the hot air flow moves forward from the tail, fully contacts with the materials, and fully utilizes the heat transfer through heat conduction, convection, and radiation; the heat energy is directly transferred to the materials, so that the moisture of the materials is continuously evaporated in the drum, and the air inlet device extracts a large amount of moisture and wet air flow, while the general small-scale drying machines use electric heating pipes to heat the air drawn in by the exhaust fan to dry the materials. The invention patent with publication number CN106196964A discloses a drying machine, including a blower, a heating pipe and an air inlet pipe, an inner dehumidification layer on the inner walls on both sides of the heating chamber, and a dehumidifier is arranged on the upper layer of the inner walls on both sides of the heating chamber, and the heat energy and wind energy are used to dry the materials on the transmission device at the same time, so as to speed up the drying speed; at the same time, the dehumidifier and the dehumidification layer can be used to dry the materials in the dryer body during drying. Moisture removal; The invention patent with the publication number CN113959216A discloses a method for dehumidification, which is provided with a heat pipe heat recovery circulation device and an internal dehumidification evaporator, which is provided with a dehumidification state and a heating state, and the heat pump dryer is controlled according to the drying room temperature and the running time by obtaining the drying room temperature and the running time of the heat pump dryer. If the preset temperature is not reached within the set time, the auxiliary electric heating device is triggered to start heating; However, the transmission fan of the dryer in the prior art cannot determine the air intake according to the specific humidity and temperature of the air outside the dryer, and the prior art adopts a normally open fixed frequency operation for the transmission fan of the dryer, which cannot be supplied on demand, resulting in waste; and the prior art implements an on-off control structure operation for the electric heating pipe of the dryer, which has high energy consumption and short service life; After the fan is not controlled by the temperature of the external environment, it is easy to form insufficient dryness, and the open-loop contactor of the controlled heating pipe is easy to get stuck and the temperature is out of control, causing a fire risk. The contactor is a mechanical component with fatigue sensitivity and other safety issues. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a variable energy-saving control system for a drying dehumidifier.

[0004] A variable energy-saving control system for a drying and dehumidifying machine comprises a drying machine body, an information transmission system, a detection system, an information comparison system and a control system.

[0005] Furthermore, the dryer body includes an air intake system, a condenser, a heating system, a drying box, and a return water box; the air intake system includes an air inlet and an air intake fan, the air intake fan is connected to a control system, and the control system controls the power of the air intake fan.

[0006] Furthermore, the output end of the air inlet fan is connected to two air supply pipes, air supply pipe I is connected to the condenser, the condenser is provided with N condensation tubes, the N condensation tubes are arranged side by side, and a connecting pipe is connected in the middle of the N condensation tubes. The connecting pipe connects the N condensation tubes, and the two ends of the condensation tubes are arc-shaped.

[0007] Furthermore, the condenser tube is filled with a cooling medium, which may be gas or water.

[0008] Furthermore, a one-way valve I is provided on the air supply pipe I.

[0009] Furthermore, an air delivery pipe I is wound around each of the N condensing tubes, and the air drawn in by the air inlet fan flows along the air delivery pipe I and is condensed and heat exchanged on the N condensing tubes.

[0010] Furthermore, one end of the air supply pipe I wound around one side of the Nth condenser pipe is connected to a return water tank.

[0011] Furthermore, the output end of the air inlet fan is connected to the air supply pipe II on the other side of the air supply pipe I, a one-way valve II is arranged on the air supply pipe II, and the other end of the air supply pipe II is connected to the heating system.

[0012] Furthermore, the heating system includes a main gas pipe, a branch gas pipe I, a branch gas pipe II, and a branch gas pipe III. A control valve I is provided on the branch gas pipe I, a control valve II is provided on the branch gas pipe II, and a control valve III is provided on the branch gas pipe III. The branch gas pipe I is connected to the heating chamber I, the branch gas pipe II is connected to the heating chamber II, the branch gas pipe III is connected to the heating chamber III, and the air pipe II is connected to the main gas pipe.

[0013] Furthermore, an electric heating system I is provided in heating chamber I, an electric heating system II is provided in heating chamber II, and an electric heating system III is provided in heating chamber III; the electric heating powers of electric heating systems I-III are different, and electric heating systems I-III are all connected to a control system, which controls the heating powers of the three electric heating systems.

[0014] Furthermore, the bottoms of the three heating chambers are all provided with holes for passing the gas pipes.

[0015] Furthermore, a heating fan is provided on one side of the three heating chambers, and the heating fan is connected to a control system, and the power of the heating fan is controlled by the control system.

[0016] Furthermore, the electric heating systems Ⅰ-Ⅲ arranged in the three heating chambers are each provided with three electric heating tube groups, each electric heating tube group is provided with N electric heating tubes, and the three electric heating tube groups constitute the electric heating system in the heating chamber, and the branch gas pipes Ⅰ-Ⅲ extend into the heating chambers Ⅰ-Ⅲ and are divided into three sections of gas pipes, upper, middle and lower. One end of the upper gas pipe is wrapped around the first group of electric heating tubes, and one end wrapped around the first heating tube of the first group of heating tubes is connected to the branch gas pipe extending into the heating chamber, and the upper gas pipe wrapped around one end of the Nth heating tube of the first group of heating tubes is connected to the overflow pipe Ⅰ and the overflow pipe Ⅱ at the upper and lower ends respectively, and overflow valves are provided on the overflow pipe Ⅰ and the overflow pipe Ⅱ.

[0017] Furthermore, a middle air supply pipe is wound around the second group of heating tubes, and one end of the middle air supply pipe is wound around the first heating tube of the second group of heating tubes and is connected to the overflow pipe II. The upper and lower ends of one end of the middle air supply pipe is wound around the Nth heating tube of the second group of heating tubes and are respectively connected to the overflow pipe III and the overflow pipe IV, and the other ends of the overflow pipe I and the overflow pipe III extend into the drying box.

[0018] Furthermore, a lower air pipe is wound around the third group of heating tubes, and one end of the lower air pipe wound around the first heating tube of the third group of heating tubes is connected to the overflow pipe IV, and the lower end of one end of the lower air pipe wound around the Nth heating tube of the third group of heating tubes is connected to the overflow pipe V, and the other end of the overflow valve V also extends into the drying box.

[0019] Furthermore, the detection system detects the humidity and temperature of the external environment of the dryer, and transmits the detection result to the information comparison system through the information transmission system.

[0020] Furthermore, the information comparison system internally stores standard temperature and humidity data, sets the standard humidity value of the environment to A, and the standard temperature value to B, and the comparison system is set so that when the information transmission system transmits information to the comparison system, the detected ambient humidity is first compared with the standard humidity value, and the detected ambient humidity value is set to A1.

[0021] Furthermore, when A1≤A, the one-way valve I is closed, the one-way valve II is opened, and the external air sucked in by the air inlet fan enters the heating system through the air supply pipe II for direct heating.

[0022] Furthermore, when A1>A, the one-way valve II is closed and the one-way valve I is opened. The external air sucked in by the air inlet fan passes through the air duct I and the condenser. After heat exchange with the condenser, the moisture in the sucked air is condensed into water and returned to the water tank.

[0023] Furthermore, after the humidity of the inhaled air is detected and compared, the temperature of the air inhaled by the air inlet fan is compared with a standard temperature in the comparison system.

[0024] Furthermore, initially, the control system controls the electric heating systems I-III in the three heating chambers to be powered off, and controls the heating fans not to work.

[0025] Furthermore, the detected ambient temperature value is set to B1. When B1≤0.1B, the heating fan and all the electric heating tube groups of the electric heating systems Ⅰ-Ⅲ in the three heating chambers are powered on and turned on through the control device, and the air that has passed the humidity detection and comparison passes through the main air pipe, and the control valve Ⅱ and the control valve Ⅲ are closed, and the control valve Ⅰ is opened, so that the airflow enters the heating chamber Ⅰ through the branch air pipe Ⅰ, and enters the heating chamber Ⅱ and the heating chamber Ⅲ through all the electric heating tube groups of the electric heating system Ⅰ in the heating chamber Ⅰ through the air pipe through the hole, and finally enters the drying box through the drying pipe.

[0026] Further, when B1>0.1B, the heating fan is turned off by the control device.

[0027] Further, when 0.1B<B1≦0.3B, the two electric heating tube groups of the electric heating systems Ⅱ-Ⅲ in the three heating chambers are powered on and turned on through the control device, the third electric heating tube group of the heating system Ⅱ-Ⅲ is controlled not to be turned on, and the three electric heating tube groups of the heating system Ⅰ are controlled to be powered on and turned on, so that the airflow enters the heating chamber Ⅰ through the gas distribution pipe Ⅰ, and enters the heating chamber Ⅱ and the heating chamber Ⅲ through all the electric heating tube groups of the electric heating system Ⅰ in the heating chamber Ⅰ through the gas distribution pipe through the hole, and finally enters the drying box through the first two electric heating tube groups of the electric heating system Ⅱ-Ⅲ.

[0028] Further, when 0.3B<B1≦0.6B, one electric heating tube group of the electric heating system Ⅱ-Ⅲ in the three heating chambers is powered on and turned on through the control device, and the second and third electric heating tube groups of the heating system Ⅱ-Ⅲ are controlled not to be turned on, and at the same time, the three electric heating tube groups of the heating system Ⅰ are controlled to be powered on and turned on, so that the airflow enters the heating chamber Ⅰ through the branch gas pipe Ⅰ, and enters the heating chamber Ⅱ and the heating chamber Ⅲ through all the electric heating tube groups of the electric heating system Ⅰ in the heating chamber Ⅰ through the gas pipe through the hole, passes through the first electric heating tube group of the electric heating system Ⅱ-Ⅲ, and finally enters the drying box.

[0029] Further, when 0.6B<B1≦B, the control device controls the heating systems II-III not to be opened, and at the same time controls the number of the three electric heating tube groups of the heating system I to be opened according to the specific temperature within the temperature range. When the three electric heating tube groups are opened, the overflow pipe I and the overflow pipe III are closed by controlling the overflow valve, and the overflow pipe II, the overflow pipe IV and the overflow pipe V are opened, so that the airflow passes through the three electric heating tube groups into the drying box.

[0030] Furthermore, when the two electric heating tube groups are opened, the overflow pipe I and the overflow pipe V are closed by controlling the overflow valve, and the overflow pipe II and the overflow pipe III are opened, so that the airflow passes through the two electric heating tube groups and enters the drying box.

[0031] Furthermore, when one electric heating tube group is turned on, all overflow pipes except overflow pipe I are closed by controlling the overflow valve, so that the airflow enters the drying box through one electric heating tube group.

[0032] Further, when 1.3B≥B1﹥B, the control device controls the electric heating systems I and III not to be opened, and controls the electric heating system II to be opened. The number of electric heating tube groups of the electric heating system II to be opened is determined by the specific temperature within the temperature range, and controls the closing of control valve I and control valve III, and opens control valve II, so that the airflow enters the heating chamber II through the gas distribution pipe II.

[0033] Further, when 1.6B>B1>1.3B, the control device controls the electric heating systems I and II not to be opened, and controls the electric heating system III to be opened. The number of electric heating tube groups of the electric heating system III to be opened is determined by the specific temperature within the temperature range, and controls the closing of control valve I and control valve II, and the opening of control valve III, so that the airflow enters the heating chamber III through the gas distribution pipe III.

[0034] Furthermore, when B1≥1.6B, the inhaled air is directly introduced into the drying chamber.

[0035] Furthermore, the heating temperature of the electric heating system I is higher than that of the electric heating system II and higher than that of the electric heating system III.

[0036] Beneficial Effects

[0037] The present invention controls the condensation system and the heating system inside the dryer by setting an energy-saving control system, and dries the inhaled air after heating it with an electric heating system. A detection system is set to detect the external environment to determine whether to condense the drawn air, and multiple heating chambers are set to determine how to heat the drawn air according to the temperature of the environment. The electric heating pipe group is initially controlled to be turned on or off by a control device, which solves the problem of high energy consumption and short service life of the electric heating pipe in the prior art that the electric heating pipe is operated with an on-off control structure, and the electric heating pipe is not frequently turned on and off to prevent damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Attached Figure 1 This is the circuit connection diagram of the dryer body.

[0039] Attached Figure 2 Schematic diagram of the condenser.

[0040] Attached Figure 3 Schematic diagram of the electric heating system.

[0041] 1-return water tank; 2-condenser; 3-check valve Ⅰ; 4-inlet fan; 5-check valve Ⅱ; 6-main gas pipeline; 7-control valve Ⅰ; 8-control valve Ⅱ; 9-control valve Ⅲ; 10-drying pipeline; 11-heating chamber Ⅰ; 12-heating chamber Ⅱ; 13-heating chamber Ⅲ; 14-drying box; 15-heating fan; 16-air pipeline Ⅰ; 17-air pipeline Ⅱ; 18-condensing pipe; 19-connecting pipe; 20-heating pipe; 21-upper gas pipeline; 22-middle gas pipeline; 23-lower gas pipeline; 24-overflow pipe Ⅰ; 25-overflow pipe Ⅱ; 26-overflow pipe Ⅲ; 27-overflow pipe Ⅳ; 28-overflow pipe Ⅴ DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] A variable energy-saving control system for a drying and dehumidifying machine comprises a drying machine body, an information transmission system, a detection system, an information comparison system, and a control system. The drying machine body comprises an air intake system, a condenser (2), a heating system, a drying box, and a water return box (1); the air intake system comprises an air inlet and an air intake fan (4), the air intake fan (4) is connected to the control system, the control system controls the power of the air intake fan (4), the output end of the air intake fan (4) is connected to two air delivery pipes, the air delivery pipe I (16) is connected to the condenser (2), the condenser (2) is provided with N condensation tubes (18), the N condensation tubes (18) are arranged side by side, a connecting pipe (19) is connected in the middle of the N condensation tubes (18), and the connecting pipe (19) connects the N condensation tubes (18) to the air supply pipe (16). The two ends of the condenser tube are in arc shape. The condenser tube (18) is filled with a cooling medium, which may be gas or water. A one-way valve I (3) is provided on the air delivery pipe I (16). The N condenser tubes (18) are all wound with the air delivery pipe I (16). The air drawn in by the air inlet fan flows along the air delivery pipe I (16) on the N condenser tubes for condensation and heat exchange. One end of the air delivery pipe I (16) wound on one side of the Nth condenser tube (18) is connected to a return water tank (1). The output end of the air inlet fan (4) is opposite to the air delivery pipe II (17) on the other side of the air delivery pipe I (16). A one-way valve II (5) is provided on the air delivery pipe II (17). The other end of the air delivery pipe II (17) is connected to a heating system. The system comprises a main gas transmission pipe (6), a branch gas transmission pipe I, a branch gas transmission pipe II and a branch gas transmission pipe III. A control valve I (7) is arranged on the branch gas transmission pipe I, a control valve II (8) is arranged on the branch gas transmission pipe II and a control valve III (9) is arranged on the branch gas transmission pipe III. The branch gas transmission pipe I is connected to a heating chamber I (11), the branch gas transmission pipe II is connected to a heating chamber II (12), the branch gas transmission pipe III is connected to a heating chamber III (13), an air transmission pipe II (17) is connected to the main gas transmission pipe, an electric heating system I is arranged in the heating chamber I (11), an electric heating system II is arranged in the heating chamber II (12), and an electric heating system III is arranged in the heating chamber III (13); the electric heating powers of the electric heating systems I-III are different, and the electric heating systems I-III are all connected to the control system, The control system controls the heating power of the three electric heating systems. The bottoms of the three heating chambers are all provided with air pipe passage holes. A heating fan is provided on one side of the three heating chambers. The heating fan is connected to the control system and the power of the heating fan is controlled by the control system. The electric heating systems I-III provided in the three heating chambers are all provided with three electric heating pipe groups. Each electric heating pipe group is provided with N electric heating pipes (20). The three electric heating pipe groups constitute the electric heating system in the heating chamber. The branch air pipes I-III extend into the heating chambers I-III and are divided into three sections of upper, middle and lower air pipes. One end of the upper air pipe (21) is wound around the first group of electric heating pipes. One end wound around the first heating pipe (20) of the first group of heating pipes is connected to the branch air pipe extending into the heating chamber.The upper air supply pipe wound around one end of the Nth heating pipe (20) of the first group of heating pipes is connected to an overflow pipe I and an overflow pipe II at the upper and lower ends thereof, respectively. Overflow pipe I and overflow pipe II are both provided with overflow valves. The middle air supply pipe (22) is wound around the second group of heating pipes. One end of the middle air supply pipe wound around the first heating pipe (20) of the second group of heating pipes is connected to the overflow pipe II. The upper and lower ends of the middle air supply pipe wound around one end of the Nth heating pipe of the second group of heating pipes are connected to an overflow pipe III and an overflow pipe IV at the upper and lower ends thereof, respectively. The other ends of the overflow pipe I and the overflow pipe III extend into the drying box. The lower air supply pipe (23) is wound around the third group of heating pipes. One end of the lower air supply pipe wound around the first heating pipe (20) of the third group of heating pipes is connected to the overflow pipe IV. The lower end of the lower air delivery pipe wound around one end of the Nth heating pipe (20) of the third group of heating pipes is connected to an overflow pipe V, and the other end of the overflow valve V also extends into the drying box. The detection system detects the humidity and temperature of the external environment of the dryer, and transmits the detection result to the information comparison system through the information transmission system. The information comparison system stores standard temperature and humidity data, sets the standard humidity value of the environment to A, and the standard temperature value to B, and the comparison system is set to, when the information transmission system transmits the information to the comparison system, first compare the detected environmental humidity with the standard humidity value, and set the detected environmental humidity value to A1. When A1≤A, close the one-way valve I, open the one-way valve II, and pass the external air sucked in by the air inlet fan. It enters the heating system through the air delivery pipe Ⅱ for direct heating. When A1>A, close the one-way valve Ⅱ and open the one-way valve Ⅰ. The external air inhaled by the air inlet fan passes through the air delivery pipe Ⅰ through the condenser. After heat exchange with the condenser, the moisture in the inhaled air condenses into water and is returned to the return water tank. The humidity of the inhaled air is detected and compared, and then the temperature of the air inhaled by the air inlet fan is compared with the standard temperature in the comparison system. Initially, the control system controls the electric heating systems Ⅰ-Ⅲ in the three heating rooms to be powered off, and controls the heating fans not to work. The detected ambient temperature value is set to B1. When B1≤0.1B, the heating fans and all the electric heating tube groups of the electric heating systems Ⅰ-Ⅲ in the three heating rooms are powered on and turned on through the control device. The air for humidity detection and comparison passes through the main air supply pipe, closes control valve II and control valve III, opens control valve I, so that the airflow enters heating chamber I through branch air supply pipe I, and enters heating chamber II and heating chamber III through all electric heating tube groups of electric heating system I in heating chamber I through the air supply pipe through the hole, and finally enters the drying box through the drying pipe. When B1>0.1B, the heating fan is turned off by the control device. When 0.1B<B1≦0.3B, the two electric heating tube groups of electric heating systems II-III in the three heating chambers are powered on and turned on by the control device, and the third electric heating tube group of heating system II-III is controlled not to be turned on. At the same time, the three electric heating tube groups of heating system I are controlled to be powered on and turned on, so that the airflow enters heating chamber I through branch air supply pipe I.And through all the electric heating tube groups of the electric heating system Ⅰ in the heating chamber Ⅰ, through the gas transmission pipe through the hole, enter the heating chamber Ⅱ and the heating chamber Ⅲ, through the first two electric heating tube groups of the electric heating system Ⅱ-Ⅲ, and finally enter the drying box. When 0.3B<B1≦0.6B, the control device will power on one of the electric heating tube groups of the electric heating system Ⅱ-Ⅲ in the three heating chambers, control the second and third electric heating tube groups of the heating system Ⅱ-Ⅲ not to be turned on, and control the three electric heating tube groups of the heating system Ⅰ to be powered on at the same time, so that the airflow enters the heating chamber Ⅰ through the branch gas transmission pipe Ⅰ, and passes through all the electric heating tube groups of the electric heating system Ⅰ in the heating chamber Ⅰ. An electric heating tube group enters heating chamber II and heating chamber III through the air delivery pipe through the hole, passes through the first electric heating tube group of electric heating system II-III, and finally enters the drying box. When 0.6B<B1≦B, the control device controls the heating system II-III not to be opened, and at the same time controls the number of openings of the three electric heating tube groups of heating system I according to the specific temperature within the temperature range. When the three electric heating tube groups are opened, the overflow pipe I (24) and overflow pipe III (26) are closed by controlling the overflow valve, and the overflow pipe II (25) and overflow pipe IV (27) and overflow pipe V (28) are opened, so that the airflow passes through the three electric heating tubes. When two electric heating tube groups are opened, overflow pipes Ⅰ and Ⅴ are closed by controlling the overflow valve, and overflow pipes Ⅱ and Ⅲ are opened, so that the airflow enters the drying box through two electric heating tube groups. When one electric heating tube group is opened, all overflow pipes except overflow pipe Ⅰ are closed by controlling the overflow valve, so that the airflow enters the drying box through one electric heating tube group. When 1.3B≥B1﹥B, the electric heating system Ⅰ and Ⅲ are not opened by the control device, and the electric heating system Ⅱ is opened. The number of electric heating tube groups opened in the electric heating system Ⅱ is determined by the specific temperature within the temperature range, and the closing is controlled. Control valve Ⅰ and control valve Ⅲ, open control valve Ⅱ, so that the airflow enters heating chamber Ⅱ through gas distribution pipe Ⅱ, when 1.6B>B1>1.3B, control the electric heating system Ⅰ and Ⅱ through the control device not to open, control the electric heating system Ⅲ to open, the number of electric heating pipe groups of electric heating system Ⅲ to open is determined by the specific temperature within the temperature range, and control the closing of control valve Ⅰ and control valve Ⅱ, open control valve Ⅲ, so that the airflow enters heating chamber Ⅲ through gas distribution pipe Ⅲ, when B1≥1.6B, the inhaled air is directly passed into the drying chamber, and the heating temperature of electric heating system Ⅰ is higher than that of electric heating system Ⅱ and electric heating system Ⅲ.

Claims

1. A variable energy-saving control system for a drying and dehumidifying machine, comprising a drying machine body, an information transmission system, a detection system, an information comparison system, and a control system. The drying machine body comprises an air intake system, a condenser, a heating system, a drying box, and a return water box; the air intake system comprises an air inlet and an air intake fan, the air intake fan is connected to the control system, the control system controls the power of the air intake fan, and the output end of the air intake fan is connected to two air supply pipes, air supply pipe I and air supply pipe II; air supply pipe I is connected to the condenser, and one-way valves I and II are respectively provided on air supply pipe I and air supply pipe II, and the other end of air supply pipe II is connected to a heating system, and the heating system comprises a main air supply pipe, a branch air supply pipe I, a branch air supply pipe II, and a branch air supply pipe III, and the branch air supply pipes I, II, and II are connected to the heating system. Control valve I, control valve II and control valve III are respectively arranged on gas pipe III, branch gas pipe I, branch gas pipe II and branch gas pipe III are respectively connected with heating chamber I, heating chamber II and heating chamber III, and air pipe II is connected with main gas pipe; electric heating system I, electric heating system II and electric heating system III are respectively arranged in heating chamber I, heating chamber II and heating chamber III; electric heating power of electric heating systems I-III is different, and electric heating systems I-III are all connected with control system, and heating power of three electric heating systems is controlled by control system; gas pipe through hole is arranged at the bottom of three heating chambers, heating fan is arranged on one side of three heating chambers, heating fan is connected with control system, and power of heating fan is controlled by control system; heating chambers are arranged with heating fan. The electric heating systems Ⅰ-Ⅲ are each provided with three electric heating tube groups, and each electric heating tube group is provided with N electric heating tubes; the opening and closing of the electric heating systems Ⅰ-Ⅲ and the opening and closing number of the N electric heating tubes of the electric heating systems Ⅰ-Ⅲ and the opening and closing of the heating fans are controlled by comparing the temperature of the air sucked in by the air inlet fan with the standard temperature; the three electric heating tube groups constitute the electric heating system in the heating chamber, and the branch air pipes Ⅰ-Ⅲ extend into the heating chambers Ⅰ-Ⅲ and are divided into three sections of upper, middle and lower air pipes, one end of the upper air pipe is wound around the first group of electric heating tubes, and one end wound around the first electric heating tube of the first group of electric heating tubes is connected to the branch air pipe extending into the heating chamber, and the upper and lower ends of the upper air pipe wound around one end of the Nth electric heating tube of the first group of electric heating tubes are respectively connected to There are overflow pipe I and overflow pipe II, and overflow valves are arranged on overflow pipe I and overflow pipe II; the middle gas pipe is wound on the second group of electric heating pipes, and one end of the middle gas pipe wound on the first electric heating pipe of the second group of electric heating pipes is connected with overflow pipe II, and the upper and lower ends of one end of the middle gas pipe wound on the Nth electric heating pipe of the second group of electric heating pipes are respectively connected with overflow pipe III and overflow pipe IV; the lower gas pipe is wound on the third group of electric heating pipes, and one end of the lower gas pipe wound on the first electric heating pipe of the third group of electric heating pipes is connected with overflow pipe IV, and the lower end of one end of the lower gas pipe wound on the Nth electric heating pipe of the third group of electric heating pipes is connected with overflow pipe V, and the other ends of overflow pipe I, overflow pipe III and overflow pipe V all extend into the drying box.

2. The variable energy-saving control system of the drying dehumidifier according to claim 1 is characterized in that: The detection system detects the humidity and temperature of the external environment of the dryer, and transmits the detection results to the information comparison system through the information transmission system. The information comparison system stores standard temperature and humidity data. The standard humidity value of the environment is set to A, the standard temperature value is B, and the information comparison system is set. When the information transmission system transmits information to the information comparison system, the detected environmental humidity is first compared with the standard humidity value, and the detected environmental humidity value is set to A1. When A1≤A, the one-way valve I is closed and the one-way valve II is opened. The external air inhaled by the air inlet fan enters the heating system through the air supply pipe II for direct heating. When A1>A, the one-way valve II is closed and the one-way valve I is opened. The external air inhaled by the air inlet fan passes through the air supply pipe I through the condenser, and after heat exchange with the condenser, the moisture in the inhaled air is condensed into water and returned to the return water tank.

3. The variable energy-saving control system of the drying dehumidifier according to claim 2 is characterized in that: After the humidity of the inhaled air is detected and compared, the temperature of the air inhaled by the air inlet fan is compared with the standard temperature in the information comparison system. Initially, the control system controls the electric heating systems Ⅰ-Ⅲ in the three heating chambers to be powered off, and controls the heating fans not to work. The detected ambient temperature value is set to B1. When B1≤0.1B, the heating fans and all the electric heating tube groups of the electric heating systems Ⅰ-Ⅲ in the three heating chambers are powered on and turned on through the control device. The air that has been detected and compared in humidity passes through the main air supply pipe, closes control valves Ⅱ and Ⅲ, and opens control valve Ⅰ, so that the airflow enters the heating chamber Ⅰ through the branch air supply pipe Ⅰ, and passes through all the electric heating tube groups of the electric heating system Ⅰ in the heating chamber Ⅰ through the air supply pipe Ⅰ. The tube enters heating chamber II and heating chamber III through the hole, and finally enters the drying box through the drying pipeline. When B1>0.1B, the heating fan is turned off by the control device. When 0.1B<B1≤0.3B, the two electric heating tube groups of the electric heating system II-III in the three heating chambers are powered on and turned on by the control device, and the third electric heating tube group of the electric heating system II-III is controlled not to be turned on. At the same time, the three electric heating tube groups of the heating system I are controlled to be powered on, so that the airflow enters the heating chamber I through the branch gas transmission pipe I, and enters the heating chamber II and heating chamber III through all the electric heating tube groups of the electric heating system I in the heating chamber I through the gas transmission pipe through the hole, and finally enters the drying box through the first two electric heating tube groups of the electric heating system II-III.

4. The variable energy-saving control system for a drying and dehumidifying machine according to claim 3, characterized in that: When 0.3B<B1≤0.6B, one electric heating tube group of the electric heating system Ⅱ-Ⅲ in the three heating chambers is powered on and turned on by the control device, the second and third electric heating tube groups of the electric heating system Ⅱ-Ⅲ are controlled not to be turned on, and the three electric heating tube groups of the electric heating system Ⅰ are controlled to be powered on and turned on, so that the airflow enters the heating chamber Ⅰ through the branch gas pipe Ⅰ, and enters the heating chamber Ⅱ and the heating chamber Ⅲ through the gas pipe through the hole of all the electric heating tube groups of the electric heating system Ⅰ in the heating chamber Ⅰ, passes through the first electric heating tube group of the electric heating system Ⅱ-Ⅲ, and finally enters the drying box. When 0.6B<B1≤B, the heating system Ⅱ-Ⅲ is controlled not to be turned on by the control device, and the number of the three electric heating tube groups of the heating system Ⅰ to be opened is controlled according to the specific temperature within the temperature range. When the three electric heating tube groups are opened, the overflow pipe Ⅰ and the overflow pipe Ⅲ are closed by controlling the overflow valve, and the overflow pipe Ⅱ, the overflow pipe Ⅳ and the overflow pipe Ⅴ are opened, so that the airflow enters the drying box through the three electric heating tube groups.

5. The variable energy-saving control system of the drying dehumidifier according to claim 4, characterized in that: When two electric heating tube groups are opened, overflow pipes I and V are closed by controlling the overflow valve, and overflow pipes II and III are opened, so that the airflow enters the drying box through the two electric heating tube groups. When one electric heating tube group is opened, all overflow pipes except overflow pipe I are closed by controlling the overflow valve, so that the airflow enters the drying box through one electric heating tube group. When 1.3B≥B1>B, the control device controls the electric heating systems I and III not to be opened, and controls the electric heating system II to be opened. The number of electric heating tube groups opened in the electric heating system II is determined by the specific temperature range. The temperature is determined by the control device, and the control valves I and III are closed, and the control valve II is opened, so that the airflow enters the heating chamber II through the gas distribution pipe II. When 1.6B>B1>1.3B, the electric heating systems I and II are controlled not to be opened through the control device, and the electric heating system III is controlled to be opened. The number of electric heating pipe groups of the electric heating system III to be opened is determined by the specific temperature within the temperature range, and the control valves I and II are closed, and the control valve III is opened, so that the airflow enters the heating chamber III through the gas distribution pipe III. When B1≥1.6B, the inhaled air is directly passed into the drying box.

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