Variable-frequency plate type heat exchange refrigeration dryer and control method thereof

Abstract

The variable-frequency plate type heat exchange refrigeration dryer comprises a supporting bottom plate, a protective shell is fixedly connected to the right end of the top of the supporting bottom plate, and a control box is fixedly installed at the upper end of the front surface of the protective shell. Through the arrangement of the compressor, the condenser, the expansion valve and the plate heat exchanger, air flowing through the interior of the heat exchange box can be cooled in the overall operation process, moisture in the air can be condensed into water drops under the cooling effect, the water drops are separated from the air, and therefore the effect of drying the air is achieved; through the arrangement of a temperature sensor, a humidity sensor, a flow sensor, a microprocessor and a frequency conversion controller, the temperature in the heat exchange box and the air flow and humidity in the air inlet pipe can be effectively monitored in the overall operation process, and meanwhile the temperature in the heat exchange box and the air flow and humidity in the air inlet pipe can be effectively monitored according to the changes of the flow and humidity of supplied air; and correspondingly performing frequency conversion control on the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of cold dryers, and in particular to a variable frequency plate heat exchange cold dryer and a control method thereof. Background Art

[0002] The plate heat exchanger cold dryer is a device that uses a plate heat exchanger to cool and dry compressed air. Its working principle is to use a plate heat exchanger to efficiently exchange heat between the refrigerant and the compressed air, so that the temperature of the compressed air is significantly reduced, and the moisture in it is condensed into water droplets. The water droplets are then completely separated from the compressed air through an air-water separator, thereby achieving dehydration and drying of the compressed air.

[0003] For example, the Chinese utility model provides "an energy-saving and environmentally friendly cold dryer", announcement number: CN210057383U, which includes a cold dryer body, the inner side of which is horizontally provided with a first mounting baffle and a second mounting baffle, the top of which is fixed with an air pre-processor, and the top of which is fixed with a heat exchanger and a refrigerant evaporator. The energy-saving and environmentally friendly cold dryer is provided with an air pre-processor, and a conveyor belt is provided inside the air pre-processor to fix two groups of air filter baffles. When cleaning the air pre-processor, the two groups of air filter baffles can be rotated and replaced by the conveyor belt, and then the replaced air filter baffles can be cleaned through the rectangular opening at the bottom of the air pre-processor, so that the air filter does not need to be disassembled for cleaning, and the operation is convenient. At the same time, it effectively prevents dust in the air from entering the cold dryer body, protects the cold dryer body, and delays its service life.

[0004] During use, the cold dryer in the above technology does not have the function of effective frequency conversion control of the refrigerant compressor, which causes the power and speed of the refrigerant compressor to be unable to be adjusted accordingly according to the humidity and flow rate of the air flowing through the cold dryer during operation, resulting in high power consumption during the overall use process and affecting the service life of the refrigerant compressor. Summary of the invention

[0005] The object of the present invention is to provide a variable frequency plate heat exchange cold dryer and a control method thereof, which has the advantages of being able to perform variable frequency control on the power and speed of the compressor according to the actual conditions of the air flow and humidity during operation, thereby ensuring the air drying effect, while reducing the power consumption of the compressor during operation and increasing the service life of the compressor.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a variable frequency plate heat exchange cold dryer, comprising a supporting base plate, a protective shell is fixedly connected to the right end of the top of the supporting base plate, a control box is fixedly installed on the upper end of the front surface of the protective shell, a variable frequency controller is fixedly installed in the inner cavity of the control box, a microprocessor is fixedly installed in the middle end of the variable frequency controller, a heat exchange box is fixedly connected to the top of the inner cavity of the protective shell, a temperature sensor is fixedly installed on the top of the inner cavity of the heat exchange box, an air intake pipe is fixedly connected between the right side of the heat exchange box and the right side of the protective shell, a flow sensor and a humidity sensor are fixedly installed on the front surface of the air intake pipe from left to right, a plate heat exchanger is fixedly installed at the middle end of the inner cavity of the heat exchange box, an expansion valve is fixedly installed on the left side of the plate heat exchanger through a pipeline, a condenser is fixedly installed on the bottom of the expansion valve through a pipeline, a compressor is fixedly installed on the bottom of the condenser through a pipeline, and the input end of the compressor is fixedly installed at the middle end of the right side of the plate heat exchanger through a pipeline.

[0007] As a preferred solution, the upper end of the right side of the protective shell is movably connected to an adjusting screw through a bearing, and the number of the adjusting screws is two. The left side of the adjusting screw is movably connected to a support plate through a bearing, and the surface of the support plate is fixedly connected to the upper end of the inner cavity of the protective shell. The left end of the adjusting screw is threadedly connected to a movable plate, and the left end of the top of the protective shell is movably connected to a movable cover through a hinge, and a push rod is movably connected between the upper end of the movable plate and the right side of the inner cavity of the movable cover through a pin shaft.

[0008] As a preferred solution, a synchronous wheel is fixedly mounted on the right end of the adjusting screw, a synchronous belt is transmission-connected between the middle ends of the two synchronous wheels, and an exhaust mesh plate is fixedly connected to the middle end of the top of the movable cover.

[0009] As a preferred solution, the left end of the top of the supporting base plate is fixedly connected to an air guide frame, and the surface of the condenser is fixedly installed on the left end of the inner cavity of the air guide frame.

[0010] As a preferred solution, a drive motor is fixedly mounted on the right end of the inner cavity of the air guide frame, and a fan blade is fixedly mounted on the output end of the drive motor.

[0011] As a preferred solution, a protection box is fixedly connected to the middle end of the right side of the protection shell, and a gas-water separator is fixedly installed between the right side of the heat exchange box and the inner cavity of the protection box through a pipeline, and an exhaust pipe is fixedly connected to the upper end of the right side of the gas-water separator.

[0012] As a preferred solution, the lower ends of both sides of the protective shell are fixedly connected with air inlet grille plates, and the bottom of the heat exchange box is fixedly connected with a guide pipe.

[0013] As a preferred solution, a support frame is fixedly connected to the middle end of the top of the support base plate, a rubber shock-absorbing seat is fixedly connected to the top of the support frame, and the bottom of the compressor is fixedly installed on the top of the rubber shock-absorbing seat.

[0014] As a preferred solution, a filter box is fixedly connected between the bottom of the intake pipe and the upper end of the right side of the outer surface of the protective shell, the lower end of the right side of the filter box is fixedly connected to an input pipe, the upper end of the inner cavity of the filter box is fixedly connected to a partition, the left end of the top of the partition is movably connected to a driving rod through a bearing, the upper end of the driving rod is fixedly connected to a driving fan blade, the surface of the driving fan blade is movably connected to the lower end of the inner cavity of the intake pipe, the lower end of the driving rod is fixedly installed with a gear, the right end of the partition is movably connected to a guide cylinder through a bearing, the upper end of the outer surface of the guide cylinder is fixedly installed with a gear ring, the gear ring is meshed with the gear, the lower end of the inner cavity of the guide cylinder is fixedly installed with an air filter, the left end of the bottom of the partition is fixedly connected with a cleaning brush, and the bottom of the air filter is movably connected to the surface of the cleaning brush.

[0015] A control method for a variable frequency plate heat exchange cold dryer, the control method comprising the following steps: A. First, when the plate heat exchange dryer is in operation, the compressor can quickly compress the refrigerant in the circulation pipeline, so that the refrigerant can generate high temperature and high pressure and flow through the condenser, and the heat in the refrigerant can be dissipated to the environment through the condenser. At the same time, the expansion valve can effectively throttle the high-pressure refrigerant after the condenser dissipates the heat, so that the refrigerant can become low temperature and low pressure and enter the plate heat exchanger. At the same time, the low-temperature refrigerant can effectively cool the air flowing through the heat exchange box through the plate heat exchanger, so that the moisture in the air flowing through the heat exchange box can be condensed into water droplets and attached to the surface of the plate heat exchanger, thereby achieving the effect of effectively drying the air; B. The temperature sensor, humidity sensor and flow sensor can effectively monitor the temperature inside the heat exchange box and the flow and humidity of the air flowing through the intake pipe. At the same time, the microprocessor can process and analyze the data monitored by the temperature sensor, humidity sensor and flow sensor in real time. If the air flow or air humidity inside the intake pipe decreases, the microprocessor can send corresponding instructions to the frequency conversion controller. C. When the frequency conversion controller receives the instruction issued by the microprocessor, it can synchronously adjust the current of the compressor accordingly, thereby effectively reducing the operating power and speed of the compressor, avoiding the waste of energy and electricity caused by the temperature inside the heat exchange box being too low due to the full load operation of the compressor, which is more energy-saving and environmentally friendly, and prolongs the service life of the compressor.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention can cool the air flowing through the heat exchange box during the overall operation by configuring a compressor, a condenser, an expansion valve and a plate heat exchanger, so that the moisture inside the air can condense into water droplets under the effect of cooling and separate them from the air, thereby achieving the effect of drying the air. In addition, by configuring a temperature sensor, a humidity sensor, a flow sensor, a microprocessor and a frequency conversion controller, the temperature inside the heat exchange box and the air flow and humidity in the air intake pipe can be effectively monitored during the overall operation, and the compressor can be correspondingly frequency-controlled according to changes in the flow and humidity of the supplied air, thereby effectively reducing the power consumption caused during the overall operation and prolonging the service life of the compressor.

[0017] The invention provides an adjusting screw, a movable plate, a push rod and a movable cover. When a person operates the adjusting screw to rotate, the movable plate can be driven to move. When the movable plate moves, the movable cover can be driven to rotate along the bearing on the protective shell through the push rod, so that the movable cover can be opened or closed from the left side of the protective shell under the action of the rotation, thereby greatly facilitating the later maintenance work of the personnel. The setting of the support plate achieves the purpose of supporting the adjusting screw and avoids the adjusting screw from tilting due to the force. The setting of the synchronous wheel and the synchronous belt can drive another set of adjusting screws to rotate while the person operates the adjusting screw to rotate, thereby greatly facilitating the use of the personnel.

[0018] The venting mechanism of the invention is to enable the venting of the air in the condenser to the engine, thereby preventing the venting of the air from entering the condenser and causing the venting of the air to enter the condenser chamber, thereby preventing the venting of the air in the condenser chamber from being vented.

[0019] The present invention can effectively filter dust in the high-pressure air flowing through the intake pipe through the arrangement of the input pipe, the filter box, the partition, the guide tube and the air filter, thereby effectively improving the cleanliness of the high-pressure air. The drive blades, the drive rod, the gear, the gear ring and the cleaning brush can effectively drive the drive blades to rotate during the flow of high-pressure air. The rotation of the drive blades can also drive the drive rod and the gear to rotate. The rotation of the gear can drive the gear ring, the guide tube and the air filter to rotate. Under the action of the rotation of the air filter, the cleaning brush can effectively clean and remove the dust attached to the bottom, thereby achieving the effect of effectively cleaning the air filter and avoiding the air filter from being blocked during long-term use and affecting the air circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereogram of the present invention; Figure 2 It is a schematic diagram of the structure on the right side of the present invention; Figure 3 It is a front cross-sectional structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the left side cross-sectional structure of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the heat exchange box of the present invention from top view; Figure 6 This is a schematic diagram of the structure of the right side of the heat exchange box of the present invention; Figure 7 This is a schematic diagram of the left side structure of the air guide frame of the present invention; Figure 8 It is a schematic diagram of the front cross-sectional structure of the filter box of the present invention.

[0021] In the figure: 1, protective shell; 2, control box; 3, push rod; 4, movable cover; 5, support bottom plate; 6, air inlet grille plate; 7, condenser; 8, air guide frame; 9, fan blade; 10, drive motor; 11, support frame; 12, rubber shock absorber seat; 13, compressor; 14, air-water separator; 15, exhaust pipe; 16, protective box; 17, heat exchange box; 18, temperature sensor; 19, plate heat exchanger; 20, microprocessor; 21, Frequency conversion controller; 22, guide tube; 23, support plate; 24, moving plate; 25, flow sensor; 26, adjusting screw; 27, synchronous wheel; 28, intake pipe; 29, humidity sensor; 30, synchronous belt; 31, expansion valve; 32, filter box; 33, drive fan blade; 34, input pipe; 35, gear; 36, partition; 37, cleaning brush; 38, air filter; 39, driving rod; 40, guide tube; 41, gear ring. DETAILED DESCRIPTION

[0022] 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.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] For example, see Figure 1-Figure 7 As shown, the present invention provides a variable frequency plate heat exchange cold dryer, comprising a supporting bottom plate 5, a protective shell 1 is fixedly connected to the right end of the top of the supporting bottom plate 5, a control box 2 is fixedly installed on the upper end of the front surface of the protective shell 1, a variable frequency controller 21 is fixedly installed in the inner cavity of the control box 2, a microprocessor 20 is fixedly installed in the middle end of the variable frequency controller 21, a heat exchange box 17 is fixedly connected to the top of the inner cavity of the protective shell 1, a temperature sensor 18 is fixedly installed on the top of the inner cavity of the heat exchange box 17, and the right side of the heat exchange box 17 is connected to the right side of the protective shell 1. An air intake pipe 28 is fixedly connected therebetween, and a flow sensor 25 and a humidity sensor 29 are fixedly installed on the front surface of the air intake pipe 28 from left to right in sequence. A plate heat exchanger 19 is fixedly installed at the middle end of the inner cavity of the heat exchange box 17, an expansion valve 31 is fixedly installed on the left side of the plate heat exchanger 19 through a pipeline, a condenser 7 is fixedly installed on the bottom of the expansion valve 31 through a pipeline, a compressor 13 is fixedly installed on the bottom of the condenser 7 through a pipeline, and an input end of the compressor 13 is fixedly installed on the middle end of the right side of the plate heat exchanger 19 through a pipeline.

[0025] In the present technical scheme, by configuring the compressor 13, the condenser 7, the expansion valve 31 and the plate heat exchanger 19, the air flowing through the heat exchange box 17 can be cooled during the overall operation, and the moisture inside the air can be condensed into water droplets under the effect of cooling, and separated from the air, thereby achieving the effect of drying the air. By configuring the temperature sensor 18, the humidity sensor 29, the flow sensor 25, the microprocessor 20 and the frequency conversion controller 21, the temperature inside the heat exchange box 17 and the air flow and humidity in the intake pipe 28 can be effectively monitored during the overall operation. At the same time, the compressor 13 can be correspondingly frequency-controlled according to the changes in the flow and humidity of the supplied air, thereby effectively reducing the power consumption caused during the overall operation and increasing the service life of the compressor 13.

[0026] Embodiment 2, based on embodiment 1, the present invention is as follows Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, it is disclosed that the upper end of the right side of the protective shell 1 is movably connected with an adjusting screw 26 through a bearing, the number of the adjusting screws 26 is two, the left side of the adjusting screw 26 is movably connected with a support plate 23 through a bearing, the surface of the support plate 23 is fixedly connected to the upper end of the inner cavity of the protective shell 1, the left end of the adjusting screw 26 is threadedly connected with a movable plate 24, the left end of the top of the protective shell 1 is movably connected with a movable cover 4 through a hinge, a push rod 3 is movably connected between the upper end of the movable plate 24 and the right side of the inner cavity of the movable cover 4 through a pin shaft, a synchronous wheel 27 is fixedly installed on the right end of the adjusting screw 26, a synchronous belt 30 is transmission-connected between the middle ends of the two synchronous wheels 27, and an exhaust mesh plate is fixedly connected to the middle end of the top of the movable cover 4.

[0027] In the present technical solution, by setting the adjusting screw 26, the movable plate 24, the push rod 3 and the movable cover 4, the movable plate 24 can be driven to move under the action of the personnel operating the adjusting screw 26 to rotate, and the movable plate 24 can drive the movable cover 4 to rotate along the bearing on the protective shell 1 through the push rod 3 while the movable plate 24 moves, so that the movable cover 4 can be opened or closed from the left side of the protective shell 1 under the action of rotation, thereby bringing great convenience to the personnel's later maintenance work, and the purpose of supporting the adjusting screw 26 is achieved by setting the support plate 23, so as to prevent the adjusting screw 26 from tilting due to the force, and by setting the synchronous wheel 27 and the synchronous belt 30, the personnel can operate the adjusting screw 26 to rotate while driving another group of adjusting screws 26 to rotate, which brings great convenience to the personnel's use.

[0028] Embodiment 3, based on embodiment 1, the present invention is as follows Figure 1-Figure 7 As shown, it is disclosed that the left end of the top of the supporting base plate 5 is fixedly connected with an air guide frame 8, the surface of the condenser 7 is fixedly installed on the left end of the inner cavity of the air guide frame 8, the right end of the inner cavity of the air guide frame 8 is fixedly installed with a driving motor 10, and the output end of the driving motor 10 is fixedly installed with a fan blade 9, the middle end of the right side of the protective shell 1 is fixedly connected with a protective box 16, the right side of the heat exchange box 17 is fixedly installed with an air-water separator 14 between the inner cavity of the protective box 16 through a pipeline, the upper end of the right side of the air-water separator 14 is fixedly connected with an exhaust pipe 15, the lower ends of both sides of the protective shell 1 are fixedly connected with an air inlet grille plate 6, the bottom of the heat exchange box 17 is fixedly connected with a guide pipe 22, the middle end of the top of the supporting base plate 5 is fixedly connected with a supporting frame 11, the top of the supporting frame 11 is fixedly connected with a rubber shock-absorbing seat 12, and the bottom of the compressor 13 is fixedly installed on the top of the rubber shock-absorbing seat 12.

[0029] In the present technical solution, the purpose of supporting the condenser 7 is achieved by setting the air guide frame 8. By setting the driving motor 10 and the fan blades 9, the fan blades 9 can be driven to rotate under the action of the driving motor 10, and the fan blades 9 can drive the air to blow quickly to the surface of the condenser 7 under the action of the rotation, which effectively improves the heat dissipation effect of the refrigerant flowing through the inside of the condenser 7. By setting the protective box 16, the gas-water separator 14 can be effectively stored and protected. By setting the gas-water separator 14 and the exhaust pipe 15 The arrangement can effectively filter and dry the air discharged from the inside of the heat exchange box 17, further improving the effect of the air drying treatment. The arrangement of the air inlet grille plate 6 is conducive to the entry of external air into the inside of the protective shell 1. The arrangement of the guide pipe 22, since the left end of the guide pipe 22 extends to the left side of the protective shell 1, allows personnel to install a control valve at the left end of the guide pipe 22, so that personnel can discharge the condensed water flowing inside the heat exchange box 17. The arrangement of the support frame 11 and the rubber shock-absorbing seat 12 achieves the purpose of shock-absorbing support for the compressor 13.

[0030] Embodiment 4, based on embodiment 1, the present invention is as follows Figure 2 and Figure 8 As shown, a filter box 32 is fixedly connected between the bottom of the air intake pipe 28 and the upper end of the right side of the outer surface of the protective shell 1, an input pipe 34 is fixedly connected to the lower end of the right side of the filter box 32, a partition 36 is fixedly connected to the upper end of the inner cavity of the filter box 32, a driving rod 39 is movably connected to the left end of the top of the partition 36 through a bearing, a driving fan blade 33 is fixedly connected to the upper end of the driving rod 39, the surface of the driving fan blade 33 is movably connected to the lower end of the inner cavity of the air intake pipe 28, a gear 35 is fixedly installed on the lower end of the driving rod 39, a guide cylinder 40 is movably connected to the right end of the partition 36 through a bearing, a gear ring 41 is fixedly installed on the upper end of the outer surface of the guide cylinder 40, the gear ring 41 is meshed with the gear 35, an air filter 38 is fixedly installed on the lower end of the inner cavity of the guide cylinder 40, a cleaning brush 37 is fixedly connected to the left end of the bottom of the partition 36, and the bottom of the air filter 38 is movably connected to the surface of the cleaning brush 37.

[0031] In the present technical scheme, by arranging the input pipe 34, the filter box 32, the partition 36, the guide tube 40 and the air filter 38, the dust in the high-pressure air flowing through the intake pipe 28 can be effectively filtered, and the cleanliness of the high-pressure air can be effectively improved. By arranging the driving blades 33, the driving rod 39, the gear 35, the gear ring 41 and the cleaning brush 37, the driving blades 33 can be effectively driven to rotate during the flow of high-pressure air. While the driving blades 33 rotate, the driving rod 39 and the gear 35 can be driven to rotate. The rotation of the gear 35 can drive the gear ring 41, the guide tube 40 and the air filter 38 to rotate. Under the action of the rotation of the air filter 38, the cleaning brush 37 can effectively clean and remove the dust attached to the bottom, thereby achieving the effect of effectively cleaning the air filter 38 and avoiding the air filter 38 from being blocked during long-term use and affecting the air circulation.

[0032] Embodiment 5, a control method of a variable frequency plate heat exchange cold dryer, the control method comprising the following steps: A. First, when the plate heat exchange cold dryer is in operation, the compressor 13 can quickly compress the refrigerant in the circulation pipeline, so that the refrigerant can generate high temperature and high pressure and flow into the condenser 7, and the heat in the refrigerant can be dissipated to the environment through the condenser 7. At the same time, under the action of the expansion valve 31, the high-pressure refrigerant after the heat is dissipated by the condenser 7 can be effectively throttled, so that the refrigerant can become low temperature and low pressure and enter the plate heat exchanger 19. At the same time, the low-temperature refrigerant can pass through the plate heat exchanger 19 to effectively cool the air flowing through the heat exchange box 17, so that the moisture in the air flowing through the heat exchange box 17 can be condensed into water droplets and attached to the surface of the plate heat exchanger 19, thereby achieving the effect of effectively drying the air; B. Under the action of the temperature sensor 18, the humidity sensor 29 and the flow sensor 25, the temperature inside the heat exchange box 17 and the flow rate and humidity of the air flowing through the intake pipe 28 can be effectively monitored respectively. At the same time, under the action of the microprocessor 20, the data monitored by the temperature sensor 18, the humidity sensor 29 and the flow sensor 25 can be processed and analyzed in real time. If the air flow rate or air humidity inside the intake pipe 28 decreases, the microprocessor 20 can send a corresponding instruction to the frequency conversion controller 21; C. When the frequency conversion controller 21 receives the instruction issued by the microprocessor 20, it can synchronously adjust the current of the compressor 13 accordingly, thereby effectively reducing the operating power and speed of the compressor 13, avoiding the waste of energy and electricity due to the low temperature inside the heat exchange box 17 caused by the full load operation of the compressor 13, which is more energy-saving and environmentally friendly, and prolongs the service life of the compressor 13.

[0033] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0034] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A variable frequency plate heat exchange cold dryer, comprising a supporting bottom plate (5), characterized in that: The right end of the top of the supporting base plate (5) is fixedly connected to a protective shell (1); a control box (2) is fixedly mounted on the upper end of the front surface of the protective shell (1); a frequency conversion controller (21) is fixedly mounted in the inner cavity of the control box (2); a microprocessor (20) is fixedly mounted in the middle end of the frequency conversion controller (21); a heat exchange box (17) is fixedly connected to the top of the inner cavity of the protective shell (1); a temperature sensor (18) is fixedly mounted on the top of the inner cavity of the heat exchange box (17); and an air intake pipe (28) is fixedly connected between the right side of the heat exchange box (17) and the right side of the protective shell (1). A flow sensor (25) and a humidity sensor (29) are fixedly mounted on the front surface of the air inlet pipe (28) from left to right in sequence, a plate heat exchanger (19) is fixedly mounted at the middle end of the inner cavity of the heat exchange box (17), an expansion valve (31) is fixedly mounted on the left side of the plate heat exchanger (19) via a pipeline, a condenser (7) is fixedly mounted on the bottom of the expansion valve (31) via a pipeline, a compressor (13) is fixedly mounted on the bottom of the condenser (7) via a pipeline, and an input end of the compressor (13) is fixedly mounted on the middle end of the right side of the plate heat exchanger (19) via a pipeline.

2. A variable frequency plate heat exchange cold dryer according to claim 1, characterized in that: The upper end of the right side of the protective shell (1) is movably connected to an adjusting screw (26) via a bearing, and the number of the adjusting screws (26) is two. The left side of the adjusting screw (26) is movably connected to a support plate (23) via a bearing, and the surface of the support plate (23) is fixedly connected to the upper end of the inner cavity of the protective shell (1). The left end of the adjusting screw (26) is threadedly connected to a movable plate (24). The left end of the top of the protective shell (1) is movably connected to a movable cover (4) via a hinge, and a push rod (3) is movably connected between the upper end of the movable plate (24) and the right side of the inner cavity of the movable cover (4) via a pin shaft.

3. A variable frequency plate heat exchange cold dryer according to claim 2, characterized in that: A synchronous wheel (27) is fixedly mounted on the right end of the adjusting screw rod (26), a synchronous belt (30) is transmission-connected between the middle ends of the two synchronous wheels (27), and an exhaust mesh plate is fixedly connected to the middle end of the top of the movable cover (4).

4. The variable frequency plate heat exchange cold dryer according to claim 1, characterized in that: The left end of the top of the supporting bottom plate (5) is fixedly connected to an air guide frame (8), and the surface of the condenser (7) is fixedly mounted on the left end of the inner cavity of the air guide frame (8).

5. The variable frequency plate heat exchange cold dryer according to claim 4, characterized in that: A drive motor (10) is fixedly mounted on the right end of the inner cavity of the air guide frame (8), and a fan blade (9) is fixedly mounted on the output end of the drive motor (10).

6. The variable frequency plate heat exchange cold dryer according to claim 1, characterized in that: A protection box (16) is fixedly connected to the middle end of the right side of the protection shell (1), a gas-water separator (14) is fixedly installed between the right side of the heat exchange box (17) and the inner cavity of the protection box (16) via a pipeline, and an exhaust pipe (15) is fixedly connected to the upper end of the right side of the gas-water separator (14).

7. The variable frequency plate heat exchange cold dryer according to claim 1, characterized in that: The lower ends of both sides of the protective shell (1) are fixedly connected to air inlet grille plates (6), and the bottom of the heat exchange box (17) is fixedly connected to a flow guide pipe (22).

8. The variable frequency plate heat exchange cold dryer according to claim 1, characterized in that: A support frame (11) is fixedly connected to the middle end of the top of the support base plate (5), a rubber shock-absorbing seat (12) is fixedly connected to the top of the support frame (11), and the bottom of the compressor (13) is fixedly mounted on the top of the rubber shock-absorbing seat (12).

9. The variable frequency plate heat exchange cold dryer according to claim 1, characterized in that: A filter box (32) is fixedly connected between the bottom of the air intake pipe (28) and the upper end of the right side of the outer surface of the protective shell (1); an input pipe (34) is fixedly connected to the lower end of the right side of the filter box (32); a partition (36) is fixedly connected to the upper end of the inner cavity of the filter box (32); a drive rod (39) is movably connected to the left end of the top of the partition (36) via a bearing; a drive blade (33) is fixedly connected to the upper end of the drive rod (39); and a surface of the drive blade (33) is movably connected to the lower end of the inner cavity of the air intake pipe (28). A gear (35) is fixedly mounted on the lower end of the driving rod (39); the right end of the partition (36) is movably connected to a guide tube (40) via a bearing; a toothed ring (41) is fixedly mounted on the upper end of the outer surface of the guide tube (40); the toothed ring (41) is meshed with the gear (35); an air filter (38) is fixedly mounted on the lower end of the inner cavity of the guide tube (40); a cleaning brush (37) is fixedly mounted on the left end of the bottom of the partition (36); and the bottom of the air filter (38) is movably connected to the surface of the cleaning brush (37).

10. A control method for a variable frequency plate heat exchange cold dryer according to any one of claims 1 to 9, characterized in that: The control method comprises the following steps: A. First, when the plate heat exchange cold dryer is in operation, the compressor (13) can quickly compress the refrigerant in the circulation pipeline, so that the refrigerant can generate high temperature and high pressure and then flow into the condenser (7), and the heat in the refrigerant can be dissipated to the environment through the condenser (7). At the same time, under the action of the expansion valve (31), the high-pressure refrigerant after the heat is dissipated by the condenser (7) can be effectively throttled, so that the refrigerant can become low temperature and low pressure and then enter the plate heat exchanger (19). At the same time, the low-temperature refrigerant can pass through the plate heat exchanger (19) to effectively cool the air flowing through the heat exchange box (17), so that the moisture in the air flowing through the heat exchange box (17) can be condensed into water droplets and attached to the surface of the plate heat exchanger (19), thereby achieving the effect of effectively drying the air; B. Under the action of the temperature sensor (18), the humidity sensor (29) and the flow sensor (25), the temperature inside the heat exchange box (17) and the flow rate and humidity of the air flowing through the intake pipe (28) can be effectively monitored respectively. At the same time, under the action of the microprocessor (20), the data monitored by the temperature sensor (18), the humidity sensor (29) and the flow sensor (25) can be processed and analyzed in real time. If the air flow rate or air humidity inside the intake pipe (28) decreases, the microprocessor (20) can send a corresponding instruction to the frequency conversion controller (21); C. When the frequency conversion controller (21) receives the instruction sent by the microprocessor (20), it can synchronously adjust the current of the compressor (13) accordingly, thereby effectively reducing the operating power and speed of the compressor (13), avoiding the waste of energy and electricity caused by the temperature inside the heat exchange box (17) being too low due to the full load operation of the compressor (13), and achieving greater energy conservation and environmental protection, and prolonging the service life of the compressor (13).

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