Movable gas defrosting device for evaporator

Abstract

The utility model relates to a movable air defrosting device for an evaporator. The movable air defrosting device comprises a frame assembly (1), a transmission assembly (2), an air defrosting movable assembly (3), a pneumatic assembly (4) and the evaporator (5). The frame assembly (1) is arranged on the evaporator (5), a supporting frame (101) on the frame assembly (1) is fixed to the evaporator (5) and used for supporting the transmission frame (102) and the whole device, a sliding rail fixing cross beam (103) is arranged on the upper portion of the transmission frame (102), sliding rails (105) are arranged on the two sides of the sliding rail fixing cross beam (103), and photoelectric switch supports (106) are arranged on the sliding rails (105). The problems that in the background technology, an evaporator adopts a water defrosting and air-free defrosting mode and a fixed calandria hole type air defrosting mode, heat exchange pieces of the evaporator in the evaporator are gradually wrapped and blocked by frost, a dead angle area is generated, and the refrigeration heat exchange efficiency of the evaporator is seriously affected are solved.

Description

Technical Field

[0001] The utility model relates to a mobile air defrosting device for an evaporator. Background Art

[0002] The basic structure and working principle of the existing evaporator defrosting are as follows: In the first case, the evaporator is provided with water defrosting without air defrosting. In the second case, the evaporator is provided with fixed row pipe hole type air defrosting, and a plurality of air injection holes are arranged on the row pipes, and high-pressure gas is ejected from the air injection holes to perform defrosting operation on the heat exchange fins of the evaporator. The existing problems are as follows: On the one hand, for the evaporator with water defrosting without air defrosting, as the evaporator cools down during refrigeration heat exchange over time, the internal heat exchange fins of the evaporator are gradually wrapped by ice layer by layer. Seriously, the space between the heat exchange fins of the evaporator is completely blocked, which seriously affects the refrigeration heat exchange efficiency of the evaporator. At this time, it is necessary to stop the machine for water defrosting, which affects the continuity of production. On the other hand, for the evaporator with fixed row pipe hole type air defrosting, due to the limitation of the fixed position of the air injection holes, there are many dead areas that cannot be sprayed between the holes and between the row pipes. The heat exchange fins of the evaporator in this area are also gradually wrapped or blocked by ice layer by layer, and the defrosting effect is not good, which also affects the refrigeration heat exchange efficiency of the evaporator. Content of the Utility Model

[0003] The purpose of the present utility model is to propose a mobile air defrosting device for an evaporator to solve the problems existing in the background technology: after the evaporator cools down through refrigeration heat exchange, the internal evaporator heat exchange fins are gradually wrapped by ice and frost layer by layer or even completely blocked; and when using a fixed row of pipe holes for air defrosting, there are many dead corner areas that cannot be sprayed, resulting in a poor defrosting effect. The technical solution adopted to solve this technical problem is: a mobile air defrosting device for an evaporator, characterized in that it includes a frame assembly, a transmission assembly, an air defrosting mobile assembly, a pneumatic assembly, and an evaporator; the frame assembly is arranged on the evaporator, and the support frame on the frame assembly is fixed to the evaporator to support the transmission frame and the overall device. A slide rail fixing cross beam is arranged on the upper part of the transmission frame, slide rails are arranged on both sides of the slide rail fixing cross beam, and an optoelectronic switch bracket is arranged on the slide rails; the transmission assembly is arranged on the transmission frame in the frame assembly, wherein a transmission sprocket, a variable frequency reduction motor, and a pedestal bearing are arranged on the driving shaft, a transmission sprocket and a pedestal bearing are arranged on the driven shaft, a transmission chain is arranged on the transmission sprocket, and the end of the transmission chain is fixed to the left and right bidirectional chain clamping plates of the mobile trolley in the pneumatic defrosting mobile assembly to provide driving traction force for the pneumatic defrosting mobile assembly. Rollers and positioning sliders are arranged on both sides of the upper part of the mobile trolley. The rollers are in contact with the upper surface of the slide rail, and the positioning sliders are in contact with the lower side of the slide rail, so that the rollers move left and right along the slide rail. Optoelectronic switch reflection baffles are arranged on the left and right sides of the mobile trolley in a bidirectional manner. When the optoelectronic switch reflection baffle moves to the position of the transmission limit optoelectronic switch, the transmission limit optoelectronic switch triggers a feedback signal and the movement of the mobile trolley stops; the pneumatic assembly is composed of a gas collecting pipe, a nozzle arranged under the mobile trolley, and a rotary bearing at the end of the gas collecting pipe. After the variable frequency reduction motor is started, the pulse solenoid valve is opened to supply gas, and the high-pressure gas source enters the gas collecting pipe through the ball valve, the pulse solenoid valve, the pressure relief valve, and the rubber hose through the rotary bearing, and finally high-pressure gas is continuously ejected from the nozzle. Among them, anti-collision pads are arranged on the slide rail fixing cross beam. To prevent damage to the transmission limit optoelectronic switch and cause the mobile trolley to collide with the frame assembly, an anti-collision protection optoelectronic switch is arranged behind the transmission limit optoelectronic switch. When the transmission limit optoelectronic switch is damaged and the optoelectronic switch reflection baffle moves to the position of the anti-collision protection optoelectronic switch, an alarm is triggered and the entire device stops running.

[0004] The beneficial effects of the present utility model compared with the background technology are: due to the adoption of the above technical solution, during the refrigeration heat exchange process of the evaporator heat exchange fins, the ice and frost on the evaporator heat exchange fins are continuously blown off by the mobile air defrosting device, delaying the situation of the evaporator heat exchange fins being wrapped and blocked by ice and frost, and avoiding the occurrence of dead corner areas through the mobile method, thereby achieving the air defrosting effect on the evaporator heat exchange fins, keeping the evaporator heat exchange fins with a very high refrigeration heat exchange efficiency, improving the sustainability of the evaporator operation, and saving energy and reducing consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 It is a schematic structural diagram of the present utility model.

[0006] Figure 2 is Figure 1 the A - A sectional view of

[0007] Figure 3 is Figure 1 the top view of

[0008] Among them, 1 is the frame assembly, which is composed of a support frame 101, a support drive frame 102, a slide rail fixed cross beam 103, an anti - collision cushion block 104, a slide rail 105, and an optoelectronic switch bracket 106; 2 is the drive assembly, which is composed of a drive shaft 201, a drive sprocket 202, a variable - frequency reduction motor 203, a driven shaft 204, a drive chain 205, and a pedestal bearing 206; 3 is the air - defrosting moving assembly, which is composed of a moving trolley 301, a chain clamp 302, rollers 303, a positioning slider 304, an optoelectronic switch reflection baffle 305, a drive limit optoelectronic switch 306, and an anti - collision protection optoelectronic switch 307; 4 is the pneumatic assembly, which is composed of a collecting pipe 401, nozzles 402, a rotary bearing 403, a ball valve 404, a pulse solenoid valve 405, a pressure relief valve 406, and a rubber hose 407; 5 is an evaporator with evaporator heat exchange fins 501 inside. Specific implementation manners

[0009] Embodiment: Refer to Figure 1 , Figure 2 , Figure 3A mobile air defrosting device for an evaporator, characterized in that it comprises a frame assembly 1, a transmission assembly 2, an air defrosting moving assembly 3, a pneumatic assembly 4, and an evaporator 5; the frame assembly 1 is arranged on the evaporator 5, and a support frame 101 on the frame assembly 1 is fixed to the evaporator 5 and is used to support a transmission frame 102 and the entire device; a slide rail fixing beam 103 is arranged on the upper part of the transmission frame 102, and slide rails 105 are arranged on both sides of the slide rail fixing beam 103, and the slide rails 105 are arranged on the upper part of the slide rails A photoelectric switch bracket 106 is provided; the transmission assembly 2 is provided on the transmission frame 102 in the frame assembly 1, wherein a transmission sprocket 202, a variable frequency reduction motor 203 and a seat bearing 206 are provided on the driving shaft 201, a transmission sprocket 202 and a seat bearing 206 are provided on the driven shaft 204, a transmission chain 205 is provided on the transmission sprocket 202, and the end of the transmission chain 205 is fixed on the left and right bidirectional chain clamp 302 of the mobile trolley 301 in the pneumatic defrosting moving assembly 3, which is a pneumatic The dynamic defrosting moving assembly 3 provides driving traction, rollers 303 and positioning sliders 304 are arranged on both sides of the upper part of the moving trolley 301, the rollers 303 are in contact with the upper side of the slide rail 105, and the positioning sliders 304 are in contact with the lower side of the slide rail 105, so that the rollers 303 move left and right along the slide rail 105, and the moving trolley 301 is bidirectionally arranged with photoelectric switch reflection baffles 305. When the photoelectric switch reflection baffles 305 move to the position of the transmission limit photoelectric switch 306, the transmission limit photoelectric switch 306 is in contact with the lower side of the slide rail 105. 6 triggers the feedback signal, and the moving trolley 301 stops moving; the pneumatic assembly 4 is composed of an air collecting pipe 401, a nozzle 402 and a rotating bearing 403 at the end of the air collecting pipe 401 arranged at the lower part of the moving trolley 301. After the variable frequency reduction motor 203 is started, the pulse solenoid valve 405 opens the air supply, and the high-pressure gas source enters the air collecting pipe through the ball valve 404, the pulse solenoid valve 405, the pressure relief valve 406 and the hose 407 through the rotating bearing 403, and finally the nozzle 402 continuously sprays high-pressure gas; An anti-collision pad 104 is provided on the fixed crossbeam 103 of the slide rail; in order to prevent the transmission limit photoelectric switch 306 from being damaged and causing the mobile trolley to collide with the frame assembly 1, an anti-collision protection photoelectric switch 307 is provided behind the transmission limit photoelectric switch 306. When the transmission limit photoelectric switch 306 is damaged, the photoelectric switch reflective baffle 305 moves to the position of the anti-collision protection photoelectric switch 307, an alarm is triggered, and the entire device stops running; because it moves left and right during operation, a hose 407 and a rotating bearing 403 are provided to prevent the air supply pipeline from being damaged by hard pulling. In summary, the transmission assembly 2 drives the traction air defrosting moving assembly 3, and the pneumatic assembly 4 completes a forward rotation air defrosting operation on the evaporator heat exchanger 501. After a period of time, the variable frequency reduction motor 203 is reversed and started to continue the air defrosting operation on the evaporator heat exchanger 501. The interval time and moving speed can be adjusted, and this is repeated.

Claims

1. A mobile gas defrosting device for an evaporator, characterized in that: It includes a frame assembly (1), a transmission assembly (2), an air-blast defrosting moving assembly (3), a pneumatic assembly (4), and an evaporator (5); the frame assembly (1) is arranged on the evaporator (5), and the support frame (101) on the frame assembly (1) is fixed to the evaporator (5) for supporting the transmission frame (102) and the whole device. A slide rail fixing cross beam (103) is arranged at the upper part of the transmission frame (102), slide rails (105) are arranged on both sides of the slide rail fixing cross beam (103), and a photoelectric switch bracket (106) is arranged on the slide rails (105); the transmission assembly (2) is arranged on the transmission frame (102) in the frame assembly (1), wherein a transmission sprocket (202), a variable-frequency reduction motor (203), and a pedestal bearing (206) are arranged on the driving shaft (201), a transmission sprocket (202) and a pedestal bearing (206) are arranged on the driven shaft (204), a transmission chain (205) is arranged on the transmission sprocket (202), and the end of the transmission chain (205) is fixed to the left and right bidirectional chain clamping plates (302) of the moving trolley (301) in the air-blast defrosting moving assembly (3) to provide driving traction force for the air-blast defrosting moving assembly (3). Rollers (303) and positioning sliders (304) are arranged on both sides of the upper part of the moving trolley (301). The rollers (303) are in contact with the upper surface of the slide rails (105), and the positioning sliders (304) are in contact with the lower side of the slide rails (105) to enable the rollers (303) to move left and right along the slide rails (105) directionally. Left and right bidirectional photoelectric switch reflection baffles (305) are arranged on the moving trolley (301). When the photoelectric switch reflection baffle (305) moves to the position of the transmission limit photoelectric switch (306), the transmission limit photoelectric switch (306) triggers a feedback signal and the movement of the moving trolley (301) stops; the pneumatic assembly (4) consists of a gas collecting pipe (401), a nozzle (402), and a rotary bearing (403) at the end of the gas collecting pipe (401) arranged at the lower part of the moving trolley (301). After the variable-frequency reduction motor (203) is started, the pulse solenoid valve (405) is opened to supply gas, and the high-pressure gas source enters the gas collecting pipe through the ball valve (404), the pulse solenoid valve (405), the pressure relief valve (406), and the rubber hose (407) via the rotary bearing (403), and finally continuously sprays high-pressure gas from the nozzle (402).

2. The mobile gas defrosting device for an evaporator according to claim 1, wherein: An anti-collision cushion block (104) is arranged on the slide rail fixing cross beam (103).

3. The mobile gas defrosting device for an evaporator according to claim 1 or 2, characterized in that: An anti-collision protection photoelectric switch (307) is arranged behind the transmission limit photoelectric switch (306). When the transmission limit photoelectric switch (306) is damaged and the photoelectric switch reflection baffle (305) moves to the position of the anti-collision protection photoelectric switch (307), an alarm is triggered and the whole device stops running.

Images