Defrosting device for refrigerated dryer

Abstract

The utility model discloses a defrosting device for a refrigerated dryer. The defrosting device comprises a water tank and a heating seat, a wedge-shaped partition plate is fixedly installed in the middle of the interior of the water tank, a water outlet is formed in the middle of the right side of the wedge-shaped partition plate, an electromagnetic valve is installed below the water outlet, the heating base is fixedly installed at the bottom of the water tank, and an electric heating plate is fixedly installed in the heating base and arranged in the water tank. A water pipe is fixedly mounted at the bottom of one side of the water tank, a water pump is fixedly mounted at one end, close to one side of the water tank, of the water pipe, a return pipe is fixedly mounted on one side of the top of the water tank, and the water pipe and the return pipe are communicated with the inside of the water tank. According to the utility model, the recycling of defrosting water can be realized, the recycled water and heated warm water can be separately stored, the situation that the defrosting efficiency is influenced by the change of water temperature caused by mixing is prevented, the structure is simple, and the defrosting operation can be completed without a complicated hot gas bypass or an electric heating device.

Description

Technical Field

[0001] The utility model relates to the technical field of defrosting of cold dryers, in particular to a defrosting device for a refrigerated dryer. Background Art

[0002] A refrigerated dryer is a device used to remove moisture from compressed air. Its working principle is based on refrigeration technology. The compressed air first enters the pre-cooler to reduce the temperature, and then enters the evaporator. In the evaporator, the temperature is further reduced to below the dew point, and the moisture condenses into liquid water and is discharged, thereby drying the compressed air. The refrigerated dryer has many advantages. For example, its drying effect is relatively stable, it can continuously provide dry air with a low dew point, the operating cost is relatively low, and the maintenance is relatively simple.

[0003] At present, refrigerated dryers may use electric heating defrosting method, hot air defrosting method or water defrosting method for defrosting operation. Among them, the electric heating defrosting method is to set an electric heating device on the surface of the condenser to heat and defrost, the hot air defrosting method uses hot air to blow or circulate on the surface of the condenser to defrost, and the water defrosting method is to defrost by water spraying or water washing;

[0004] However, the current water defrosting method often cannot recycle water when in use, which easily causes a waste of water resources. Secondly, the water temperature during defrosting often cannot be accurately controlled. Too low water temperature often results in poor defrosting effect, and too high water temperature often damages the device due to thermal shock. Defrosting devices with recycling functions often directly mix with warm water during water recycling, causing the water temperature to drop and affecting the defrosting efficiency.

[0005] Therefore, how to provide a defrosting device for a refrigerated dryer is a problem that those skilled in the art need to solve urgently. Utility Model Content

[0006] One purpose of the utility model is to provide a defrosting device for a refrigerated dryer. The utility model can realize the recycling of defrosting water, and the recycled water can be stored separately from the heated warm water to prevent mixing from causing changes in water temperature that affect defrosting efficiency. The utility model has a simple structure and does not require complex hot air bypass or electric heating devices to complete the defrosting operation.

[0007] According to an embodiment of the utility model, a defrosting device for a refrigerated dryer comprises a water tank and a heating seat;

[0008] A wedge-shaped partition is fixedly installed in the center of the water tank, a drain port is installed in the center of the right side of the wedge-shaped partition, a solenoid valve is installed below the drain port, the heating seat is fixedly installed at the bottom of the water tank, an electric heating plate is fixedly installed in the heating seat, and the electric heating plate is placed inside the water tank;

[0009] A water supply pipe is fixedly installed at the bottom of one side of the water tank, a water pump is fixedly installed at one end of the water supply pipe and close to one side of the water tank, a return pipe is fixedly installed on one side of the top of the water tank, the water supply pipe and the return pipe are both connected to the inside of the water tank, and a liquid level sensor and a water temperature sensor are fixedly installed on both sides of the inner rear wall of the water tank.

[0010] Furthermore, a nozzle is fixedly installed at the other end of the water delivery pipe, and a plurality of nozzles are installed at the bottom of the nozzle. The nozzle is arranged above the condenser inside the refrigerated dryer.

[0011] Furthermore, a joint is provided at the other end of the reflux pipe, and the joint is connected to the drain outlet of the refrigerated dryer.

[0012] Furthermore, a control module is fixedly installed above the side wall of the water tank, and the signal output ends of the liquid level sensor and the water temperature sensor are connected to the signal input end of the control module, and the signal output end of the control module is connected to the signal input end of the water pump and the solenoid valve.

[0013] Furthermore, heat dissipation holes are formed through the outer walls of both sides of the heating seat, and the number of the heat dissipation holes is multiple groups.

[0014] Furthermore, a water injection port is fixedly installed on the top of the water tank and located on the other side of the return pipe, and the water injection port is communicated with the water tank.

[0015] Furthermore, the interior of the water tank is divided into an upper water storage chamber and a lower heating chamber by a wedge-shaped partition.

[0016] The beneficial effects of the utility model are:

[0017] The utility model can pump out warm water through a water pump and spray it onto the condenser to complete defrosting, and can also recycle water. The wedge-shaped partition in the water tank can divide the interior of the water tank into a water storage chamber and a heating chamber, which are respectively used for storing water and heating water. During use, the solenoid valve controls the connection and closing of the two to prevent the water recycled after defrosting from directly mixing with the heated warm water and causing the water temperature to drop, thereby effectively ensuring that the temperature of the water used for defrosting can be maintained in a suitable range, thereby ensuring the defrosting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of a defrosting device for a refrigerated dryer proposed by the utility model;

[0020] Figure 2The utility model is a schematic cross-sectional structure diagram of a defrosting device for a refrigerated dryer.

[0021] In the figure: 1. Water tank; 2. Heating seat; 3. Water supply pipe; 4. Nozzle; 5. Nozzle; 6. Return pipe; 7. Connector; 8. Water filling port; 9. Water pump; 10. Heat dissipation hole; 11. Wedge-shaped partition; 12. Drain port; 13. Electric heating plate; 14. Liquid level sensor; 15. Water temperature sensor; 16. Control module; 17. Solenoid valve. DETAILED DESCRIPTION

[0022] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0023] refer to Figure 1-2 , a defrosting device for a refrigerated dryer, comprising a water tank 1 and a heating seat 2;

[0024] A water delivery pipe 3 is fixedly installed at the bottom of one side of the water tank 1, a water pump 9 is fixedly installed at one end of the water delivery pipe 3 and close to one side of the water tank 1, and a return pipe 6 is fixedly installed on one side of the top of the water tank 1. The water delivery pipe 3 and the return pipe 6 are both connected to the inside of the water tank 1;

[0025] The other end of the water delivery pipe 3 is fixedly mounted with a nozzle 4, and a plurality of nozzles 5 are mounted at the bottom of the nozzle 4. The nozzle 4 is arranged above the condenser inside the refrigerated dryer.

[0026] The other end of the return pipe 6 is provided with a joint 7, and the joint 7 is connected to the drain outlet of the refrigerated dryer;

[0027] A water injection port 8 is fixedly installed on the top of the water tank 1 and located on the other side of the return pipe 6, and the water injection port 8 is connected to the water tank 1;

[0028] In this embodiment, water for defrosting can be injected into the water tank 1. When defrosting is needed, the water can be pumped out by starting the water pump 9 and transported to the nozzle 4 through the water pipe 3. Finally, the water is evenly sprayed on the condenser through each group of nozzles 5 to achieve defrosting. The defrosted water can enter the return pipe 6 through the drain port and finally flow back into the water tank 1.

[0029] refer to Figure 1-2 A wedge-shaped partition 11 is fixedly installed in the center of the water tank 1, and the interior of the water tank 1 is divided into an upper water storage chamber and a lower heating chamber by the wedge-shaped partition 11;

[0030] Among them, a liquid level sensor 14 and a water temperature sensor 15 are fixedly installed on both sides of the inner rear wall of the water tank 1, and the liquid level sensor 14 and the water temperature sensor 15 are both arranged in the heating chamber. The threshold value of the water temperature sensor 15 is set between 40-60 degrees Celsius. This water temperature can ensure effective defrosting without causing thermal shock to the equipment;

[0031] A drain port 12 is centrally installed on the right side of the wedge-shaped partition 11, and a solenoid valve 17 is installed below the drain port 12. The heating seat 2 is fixedly installed at the bottom of the water tank 1, and an electric heating plate 13 is fixedly installed inside the heating seat 2, and the electric heating plate 13 is placed inside the water tank 1;

[0032] Among them, the outer walls on both sides of the heating seat 2 are penetrated with heat dissipation holes 10, and the number of heat dissipation holes 10 is multiple groups. The heat dissipation holes 10 can achieve a good heat dissipation effect when the electric heating plate 13 is working, preventing the sealing high temperature from affecting the service life;

[0033] Secondly, a control module 16 is fixedly installed above the side wall of the water tank 1, and the signal output ends of the liquid level sensor 14 and the water temperature sensor 15 are connected to the signal input end of the control module 16, and the signal output end of the control module 16 is connected to the signal input end of the water pump 9 and the solenoid valve 17;

[0034] In this embodiment, the water level inside the heating chamber below the wedge-shaped partition 11 can be monitored by the liquid level sensor 14. When the water level inside the heating chamber is low, the control module 16 can start the solenoid valve 17. At this time, the water in the water storage chamber can enter the heating chamber through the drain port 12. When the heating chamber is full, the solenoid valve 17 is closed, and the electric heating plate 13 is started to heat the water inside the heating chamber. When the water temperature sensor 15 monitors that the water temperature is heated to between 40 and 60 degrees Celsius, the heating can be stopped, and then the water pump 9 can be started to pump water for defrosting operation, and the reflux water can fall into the water storage chamber for standby. When the liquid level sensor 14 monitors that the water in the heating chamber below is used up, the water pump 9 stops, and then the solenoid valve 17 is opened again to discharge the water in the water storage chamber into the heating chamber. This cycle can complete the intermittent defrosting operation.

[0035] Working principle: first, the nozzle is set above the condenser inside the cold dryer, and the connection between the return pipe and the drain outlet of the cold dryer can be achieved through the joint 7. During the defrosting operation, the electric heating plate 13 can first heat the water inside the heating chamber. When the water temperature sensor 15 monitors that the water temperature is heated to a suitable temperature range, the heating can be stopped, and then the water pump 9 can be started. At this time, the warm water can be transported to the nozzle 4 along the water pipe 3, and finally sprayed on the condenser by each group of nozzles to melt the frost layer on the surface of the condenser. The melted water can flow back to the water storage chamber above the water tank 1 through the return pipe 6. When the warm water in the heating chamber monitored by the liquid level sensor 14 is used up, it means that a defrosting operation is completed. At the same time, the solenoid valve 17 can be controlled to open, so that the water in the water storage chamber enters the heating chamber. At this time, when the liquid level sensor 14 detects that the injected water level reaches the maximum threshold, the solenoid valve 17 will automatically close. The above operation can be performed again during the next defrosting operation. Each cycle step is started by timing control, so it can be completed intermittently.

[0036] It is understandable that the water pump, solenoid valve, liquid level sensor, water temperature sensor and control module in the utility model can be powered by an external power cord, and the water pump and solenoid valve can be programmed and controlled by the control module, and the control principle can be realized by existing control technology. The models of the water pump, solenoid valve, liquid level sensor, water temperature sensor and control module are not limited to a single type and can be any type currently available on the market that is suitable for the utility model.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A defrosting device for a freeze dryer, characterized in that: It comprises a water tank (1) and a heating seat (2); A wedge-shaped partition (11) is fixedly installed in the center of the water tank (1), a drain port (12) is installed in the center of the right side of the wedge-shaped partition (11), and a solenoid valve (17) is installed below the drain port (12); the heating seat (2) is fixedly installed at the bottom of the water tank (1), an electric heating plate (13) is fixedly installed in the heating seat (2), and the electric heating plate (13) is placed inside the water tank (1); A water delivery pipe (3) is fixedly mounted at the bottom of one side of the water tank (1); a water pump (9) is fixedly mounted at one end of the water delivery pipe (3) and close to one side of the water tank (1); a return pipe (6) is fixedly mounted on one side of the top of the water tank (1); the water delivery pipe (3) and the return pipe (6) are both interconnected with the interior of the water tank (1); and a liquid level sensor (14) and a water temperature sensor (15) are fixedly mounted on both sides of the inner rear wall of the water tank (1), respectively.

2. A defrosting device for a freeze dryer according to claim 1, characterized in that: A spray pipe (4) is fixedly mounted on the other end of the water delivery pipe (3), a plurality of groups of spray heads (5) are mounted on the bottom of the spray pipe (4), and the spray pipe (4) is arranged above the condenser inside the refrigerated dryer.

3. The defrosting device for a freeze dryer according to claim 1, characterized in that: The other end of the reflux pipe (6) is provided with a joint (7), and the joint (7) is interconnected with the drain outlet of the refrigerated dryer.

4. The defrosting device for a freeze dryer according to claim 1, characterized in that: A control module (16) is fixedly installed above the side wall of the water tank (1); the signal output ends of the liquid level sensor (14) and the water temperature sensor (15) are connected to the signal input end of the control module (16); and the signal output end of the control module (16) is connected to the signal input end of the water pump (9) and the solenoid valve (17).

5. The defrosting device for a freeze dryer according to claim 1, characterized in that: The outer walls of both sides of the heating seat (2) are penetrated with heat dissipation holes (10), and the number of the heat dissipation holes (10) is multiple groups.

6. The defrosting device for a freeze dryer according to claim 1, characterized in that: A water injection port (8) is fixedly installed on the top of the water tank (1) and located on the other side of the return pipe (6), and the water injection port (8) is communicated with the water tank (1).

7. The defrosting device for a freeze dryer according to claim 1, characterized in that: The interior of the water tank (1) is divided into an upper water storage chamber and a lower heating chamber by a wedge-shaped partition (11).

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