Novel molecular sieve type dehumidifying dryer

Abstract

The utility model relates to a novel molecular sieve type dehumidifying dryer which comprises a drying charging barrel, a fan, a heating pipe, a dehumidifying barrel, a first switching valve, a second switching valve and a third switching valve, the first switching valve is provided with an air inlet port, and the third switching valve is provided with an air outlet port. A drying circulation is formed among the air outlet of the drying charging barrel, the first switching valve, the fan, the heating pipe, the second switching valve and the air inlet of the drying charging barrel, and the dehumidifying barrel provides air which comes from the fan and is treated by the dehumidifying barrel for the drying circulation; a regeneration cycle is formed among an air inlet port of the first switching valve, the fan, the heating pipe, the second switching valve, the dehumidification cylinder and an air outlet port of the third switching valve, in the drying cycle and the regeneration cycle, the fan is a forward rotating fan, and the heating pipe is used as a regeneration heating pipe and a drying heating pipe. One heating pipe is saved, and the purposes of saving space, saving installation power, achieving miniaturization and improving drying efficiency are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drying, and particularly relates to a novel molecular sieve type dehumidifying dryer. Background Art

[0002] Among dehumidifying dryers, there is a type of dryer called molecular sieve type dryer, whose drying method is intermittent drying. The drying function is achieved by the forward rotation of the fan, and then the regeneration function is achieved by the reverse rotation of the fan. The drying time is generally 45 minutes, and the regeneration + cooling time is 15 minutes. Then the drying efficiency is 45 min / (45 min + 15 min) × 100% = 75%.

[0003] For the above dryer, the core component is the fan. In order to achieve the drying and regeneration functions, this fan needs to have the functions of forward rotation and reverse rotation. Therefore, currently, generally imported brand fans are selected, but their costs are high and the delivery periods are very long. To solve the fan problem, domestic fans can be used for substitution. The forward rotation ability of domestic fans is similar to that of imported brands, but their reverse rotation ability is much worse than that of imported brands, and the air volume cannot meet the design requirements. If the fan is developed again, the cost will be even higher, reducing the economic benefits.

[0004] The applicant applied for a Chinese utility model patent before. By adding a switching valve, it is possible to achieve the purpose of regenerating and drying the dehumidifying cylinder while a fan always maintains forward rotation. Specifically, as Figure 1 shown in the flowchart, the novel dryer includes a drying hopper 1, a drying filter 2, a condenser 3, a fan 6, a regeneration heating pipe 7, a dehumidifying cylinder 8, a drying heating pipe 10, a fifth switching valve 5, and a sixth switching valve 9. The air outlet of the drying hopper 1 is sequentially connected to the air inlet of the drying hopper 1 through the drying filter 2, the condenser 3, the fifth switching valve 5, the fan 6, the regeneration heating pipe 7, the dehumidifying cylinder 8, the second switching valve 9, and the drying heating pipe 10. The fifth switching valve 5 and the second switching valve 9 are both three-way valves. The fifth switching valve 5 has an air inlet port 13, and the sixth switching valve 9 has an air outlet port 14, so as to form a drying cycle between the air outlet of the drying hopper 1, the drying filter 2, the condenser 3, the fifth switching valve 5, the fan 6, the regeneration heating pipe 7, the dehumidifying cylinder 8, the sixth switching valve 9, the drying heating pipe 10, and the air inlet of the drying hopper 1, and form a regeneration cycle between the air inlet port 13 of the fifth switching valve 5, the fan 6, the regeneration heating pipe 7, the dehumidifying cylinder 8, and the air outlet port 14 of the sixth switching valve 9. In the drying cycle and the regeneration cycle, the fan 6 is a forward rotation fan, that is, the fan always maintains forward rotation and does not need to reverse.

[0005] In this technical solution, although the fan always rotates forward, two heating tubes are required at the same time, which is not convenient for the energy saving and installation space of the entire dryer. Therefore, it is necessary to further optimize on the basis of this technical solution. Summary of the Invention

[0006] In order to solve the above problems in the prior art, the present invention provides a new type of molecular sieve dehumidifying dryer that saves space, saves installed power, is miniaturized, and improves drying efficiency.

[0007] In order to achieve the above object, the new type of molecular sieve dehumidifying dryer of the present invention is mainly characterized in that it includes a drying barrel, a fan, a heating tube, a dehumidifying barrel, a first switching valve, a second switching valve, and a third switching valve. The exhaust port of the drying barrel is sequentially connected to the air inlet of the drying barrel through the first switching valve, the fan, the heating tube, and the second switching valve. The dehumidifying barrel is arranged in parallel with the fan. The dehumidifying barrel is in a bypass circuit. The first switching valve, the second switching valve, and the third switching valve are all three-way valves. The third switching valve is arranged at the exhaust end of the dehumidifying barrel in the bypass circuit. One port of the second switching valve is connected to the air inlet end of the dehumidifying barrel. The first switching valve has an air inlet port, and the third switching valve has an air outlet port, so as to form a drying cycle between the exhaust port of the drying barrel, the first switching valve, the fan, the heating tube, the second switching valve, and the air inlet of the drying barrel. And the dehumidifying barrel provides air from the fan and processed by the dehumidifying barrel to the drying cycle; a regeneration cycle is formed between the air inlet port of the first switching valve, the fan, the heating tube, the second switching valve, the dehumidifying barrel, and the air outlet port of the third switching valve. In the drying cycle and the regeneration cycle, the fan is a forward-rotating fan, and the heating tube serves as both a regeneration heating tube and a drying heating tube.

[0008] Preferably, the dehumidifying dryer further includes a fourth switching valve. The fourth switching valve is a two-way valve. The fourth switching valve is arranged at the air inlet end of the dehumidifying barrel in the bypass circuit. And one port of the second switching valve is connected between the fourth switching valve and the air inlet end of the dehumidifying barrel.

[0009] Preferably, the first switching valve, the second switching valve, the third switching valve, and the fourth switching valve are controlled by a common solenoid valve.

[0010] Preferably, the first end of the first switching valve is an air inlet port, the second end of the first switching valve is connected to the air inlet of the drying barrel, and the third end of the first switching valve is connected to the air inlet end of the fan;

[0011] The first end of the second switching valve is connected to the exhaust end of the heating pipe, the second end of the second switching valve is connected to the air inlet of the drying cylinder, and the third end of the second switching valve is connected to the exhaust end of the dehumidifying cylinder;

[0012] The first end of the third switching valve is the air outlet port, the second end of the third switching valve is connected to the exhaust end of the dehumidifying cylinder, and the third end of the third switching valve is connected to the air inlet end of the fan.

[0013] Preferably, the exhaust port of the drying cylinder is connected to the second end of the first switching valve through a drying filter.

[0014] Preferably, a condenser is provided between the drying filter and the second end of the first switching valve.

[0015] Preferably, a regeneration filter is provided at the air inlet port of the first switching valve.

[0016] Preferably, temperature probes are provided at the air inlet of the drying cylinder and the air inlet end of the dehumidifying cylinder.

[0017] The novel molecular sieve dehumidifying dryer of the present utility model saves one heating pipe, achieving the purposes of saving space, saving installed power, miniaturization, and improving drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic structural diagram of an existing dryer.

[0019] Figure 2 FIG. is a schematic structural diagram of the novel molecular sieve dehumidifying dryer of the present utility model. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Such as Figure 2As shown in the figure, it is a specific embodiment of the novel molecular sieve dehumidifying dryer of the present utility model. Among them, the dehumidifying dryer includes a drying barrel 1, a blower 6, a heating pipe 20, a dehumidifying barrel 8, a first switching valve 15, a second switching valve 19, and a third switching valve 16. The air outlet of the drying barrel 1 is sequentially connected to the air inlet of the drying barrel 1 through the first switching valve 15, the blower 6, the heating pipe 20, and the second switching valve 19. The dehumidifying barrel 8 is arranged in parallel with the blower 6. The dehumidifying barrel 8 is in a bypass circuit. The first switching valve 15, the second switching valve 19, and the third switching valve 16 are all three-way valves. The third switching valve 16 is arranged at the exhaust end of the dehumidifying barrel 8 in the bypass circuit. One port of the second switching valve 19 is connected to the air inlet end of the dehumidifying barrel 8. The first switching valve 15 has an air inlet port 13, and the third switching valve 16 has an air outlet port 17, so as to form a drying cycle between the air outlet of the drying barrel 1, the first switching valve 15, the blower 6, the heating pipe 20, the second switching valve 19, and the air inlet of the drying barrel 1. And the dehumidifying barrel 8 provides air from the blower 6 and processed by the dehumidifying barrel 8 to the drying cycle; a regeneration cycle is formed between the air inlet port 13 of the first switching valve 15, the blower 6, the heating pipe 20, the second switching valve 19, the dehumidifying barrel 8, and the air outlet port 17 of the third switching valve 16. In the drying cycle and the regeneration cycle, the blower 6 is a forward rotation blower, and the heating pipe 20 serves as both a regeneration heating pipe and a drying heating pipe.

[0022] Thus, based on the above settings of the present utility model, one heating pipe can be saved, that is, the heating pipe for drying and the heating pipe for regeneration share one.

[0023] For the dryer of the present utility model, domestic blowers can also be used to meet the requirements, reducing the blower cost. The forward rotation ability of domestic blowers is equivalent to that of imported brands. And since the reverse air volume of imported brands is about 60% of the forward air volume, and the blower always rotates forward, the actual air volume value during regeneration is greater than the air volume value during regeneration of imported brand blowers, and the regeneration work can be completed more quickly, saving the regeneration time, thereby improving the drying efficiency.

[0024] The dehumidifying dryer further includes a fourth switching valve 18. The fourth switching valve 18 is a two-way valve. The fourth switching valve 18 is arranged at the air inlet end of the dehumidifying barrel 8 in the bypass circuit, and one port of the second switching valve 19 is connected between the fourth switching valve 18 and the air inlet end of the dehumidifying barrel 8.

[0025] The first switching valve 15, the second switching valve 19, the third switching valve 16, and the fourth switching valve 18 can achieve the switching of the valve body by being controlled by a common solenoid valve to perform regeneration and drying.

[0026] The first end of the first switching valve 15 is an air inlet port 13. The second end of the first switching valve 15 is connected to the air inlet of the drying cylinder 1. The third end of the first switching valve 15 is connected to the air inlet end of the blower 6.

[0027] The first end of the second switching valve 19 is connected to the exhaust end of the heating pipe 20. The second end of the second switching valve 19 is connected to the air inlet of the drying cylinder 1. The third end of the second switching valve 19 is connected to the exhaust end of the dehumidifying cylinder 8.

[0028] The first end of the third switching valve 16 is an air outlet port 17, and the air outlet port 17 communicates with the outside atmosphere. The second end of the third switching valve 16 is connected to the exhaust end of the dehumidifying cylinder 8. The third end of the third switching valve 16 is connected to the air inlet end of the blower 6.

[0029] During drying, the first switching valve 15 is switched so that the second end of the first switching valve 15 communicates with the third end of the first switching valve 15. At the same time, the second switching valve 19 is switched so that the second end of the second switching valve 19 communicates with the first end of the second switching valve 19. The third switching valve 16 is switched so that the second end of the third switching valve 16 communicates with the third end of the third switching valve 16 to form a drying path. And the fourth switching valve 18 is opened. Through the operation of the bypass, the dehumidifying cylinder continuously provides low dew point air to the drying cycle, so that the air entering the drying cylinder is low dew point air, achieving a dehumidification capacity equivalent to that of a direct-connected dehumidifying cylinder.

[0030] During regeneration, the first switching valve 15 is switched so that the second end of the first switching valve 15 communicates with the third end of the first switching valve 15. At the same time, the second switching valve 19 is switched so that the first end of the second switching valve 19 communicates with the third end of the second switching valve 19. The third switching valve 16 is switched so that the second end of the third switching valve 16 communicates with the first end of the third switching valve 16, and the fourth switching valve 18 is closed to form a regeneration path. By switching the four switching valves, it is possible to share a common heating pipe and simultaneously achieve the regeneration and drying functions without adjusting the rotation direction of the blower. Since the air volume value during regeneration is large, the regeneration work can be completed more quickly, saving the regeneration time, thereby improving the drying efficiency. Theoretically, the time for regeneration + cooling is 12 minutes, and the drying time is 48 minutes. In this way, the drying efficiency can reach 48 min / (48 min + 12 min) × 100% = 80%.

[0031] The air outlet of the described drying cylinder 1 is connected to the second end of the described first switching valve 15 through a drying filter 2.

[0032] A condenser 3 is arranged between the described drying filter 2 and the second end of the described first switching valve 15. Specifically, the air from the air outlet of the described drying cylinder 1 enters the drying cycle through the drying filter 2.

[0033] A regeneration filter 4 is arranged at the air inlet port of the described first switching valve 15. Specifically, ambient air passes through the regeneration filter 4, the air inlet port 13 of the described first switching valve 15, a blower 6, a heating pipe 20, a second switching valve 19, a dehumidifying cylinder 8, and the air outlet port 17 of a third switching valve 16 and is discharged to the outside atmosphere to form a regeneration cycle.

[0034] A first temperature probe 11 is arranged at the air inlet of the described drying cylinder 1, and second temperature probes 12 are arranged at the air inlet ends of the described dehumidifying cylinders 8.

[0035] The novel molecular sieve type dehumidifying and drying machine of the present utility model saves one heating pipe and achieves the purposes of saving space, saving installed power, miniaturization, and improving drying efficiency.

[0036] In this specification, the present utility model has been described with reference to its specific embodiments. However, it is obvious that various modifications and transformations can still be made without departing from the spirit and scope of the present utility model. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Claims

1. A new type of molecular sieve dehumidifying dryer, characterized in that, It includes a drying hopper, a blower, heating pipes, a dehumidifying cylinder, a first switching valve, a second switching valve and a third switching valve. The air outlet of the drying hopper is sequentially connected to the air inlet of the drying hopper through the first switching valve, the blower, the heating pipes and the second switching valve. The dehumidifying cylinder is arranged in parallel with the blower. The dehumidifying cylinder is in a bypass circuit. The first switching valve, the second switching valve and the third switching valve are all three-way valves. The third switching valve is arranged at the air exhaust end of the dehumidifying cylinder in the bypass circuit. One port of the second switching valve is connected to the air inlet end of the dehumidifying cylinder. The first switching valve has an air inlet port. The third switching valve has an air outlet port, so as to form a drying cycle among the air outlet of the drying hopper, the first switching valve, the blower, the heating pipes, the second switching valve and the air inlet of the drying hopper. And the dehumidifying cylinder provides air from the blower and processed by the dehumidifying cylinder to the drying cycle; A regeneration cycle is formed among the air inlet port of the first switching valve, the blower, the heating pipes, the second switching valve, the dehumidifying cylinder and the air outlet port of the third switching valve. In the drying cycle and the regeneration cycle, the blower is a forward rotation blower, and the heating pipes serve as both regeneration heating pipes and drying heating pipes.

2. The novel molecular sieve dehumidifying dryer according to claim 1, wherein The dehumidifying and drying machine further includes a fourth switching valve. The fourth switching valve is a two-way valve. The fourth switching valve is arranged at the air inlet end of the dehumidifying cylinder in the bypass circuit. And one port of the second switching valve is connected between the fourth switching valve and the air inlet end of the dehumidifying cylinder.

3. The novel molecular sieve dehumidifying dryer according to claim 2, wherein, The first switching valve, the second switching valve, the third switching valve and the fourth switching valve are controlled by a common solenoid valve.

4. The novel molecular sieve dehumidifying dryer according to claim 1, characterized in that, The first end of the first switching valve is the air inlet port. The second end of the first switching valve is connected to the air inlet of the drying hopper. The third end of the first switching valve is connected to the air inlet end of the blower; The first end of the second switching valve is connected to the air exhaust end of the heating pipes. The second end of the second switching valve is connected to the air inlet of the drying hopper. The third end of the second switching valve is connected to the air exhaust end of the dehumidifying cylinder; The first end of the third switching valve is the air outlet port. The second end of the third switching valve is connected to the air exhaust end of the dehumidifying cylinder. The third end of the third switching valve is connected to the air inlet end of the blower.

5. The novel molecular sieve dehumidifying dryer according to claim 4, wherein, The air outlet of the drying hopper is connected to the second end of the first switching valve through a drying filter.

6. The novel molecular sieve dehumidifying dryer according to claim 5, wherein A condenser is arranged between the drying filter and the second end of the first switching valve.

7. The novel molecular sieve dehumidifying dryer according to claim 1, characterized in that, A regeneration filter is arranged at the air inlet port of the first switching valve.

8. The novel molecular sieve dehumidifying dryer according to claim 1, wherein Temperature probes are arranged at the air inlet of the drying hopper and the air inlet end of the dehumidifying cylinder.

Images