An anti-frost type fan for ultra-low temperature storage and an anti-frost method

Abstract

The present invention relates to the technical field of fans for ultra-low temperature warehouses, and more specifically, it relates to an anti-frost type fan for ultra-low temperature warehouses and an anti-frost method. The structure includes a shell, a fan body and a defrosting device arranged in the shell, an air outlet arranged at a high position of the shell, and a return air outlet arranged at a low position of the shell. The air outlet and the return air outlet are both used to extend into the ultra-low temperature warehouse. A shutter assembly is arranged at the air outlet, and the shutter assembly is used to open and close the air outlet. A water receiving box is arranged in the shell, and the water receiving box is arranged at the bottom of the shell for receiving condensed water. A drain port is provided at the bottom of the water receiving box. The anti-frost type fan for ultra-low temperature warehouses and the anti-frost method of the present invention can solve the problem of frost in the ultra-low temperature warehouse caused by defrosting in the fan.

Description

Technical Field

[0001] The invention relates to the technical field of fans for ultra-low temperature warehouses, in particular to an anti-frost fan for ultra-low temperature warehouses and an anti-frost method. Background Art

[0002] An ultra-low temperature warehouse is a device specially used to store low-temperature items. Its storage environment is usually around -50°C to -80°C. In an ultra-low temperature cold storage, low-temperature airflow can easily form local accumulation at the bottom of the warehouse, resulting in a decrease in the quality of the stored items. Therefore, in an ultra-low temperature cold storage, a device that can effectively stir the cold air is needed to ensure temperature balance. This device is a fan.

[0003] In the prior art, in order to cope with the situation that the fan is prone to frost in the ultra-low temperature warehouse, some fans are equipped with heating components or heat exchange components to defrost the fan. However, during the defrosting process of the fan, the temperature rises, making the temperature difference between the fan and the ultra-low temperature warehouse too large, and a large amount of water vapor will be generated. The water vapor will escape from the air outlet of the fan and spread in the ultra-low temperature warehouse, thereby causing frost to form in the ultra-low temperature warehouse. Summary of the invention

[0004] In order to solve the problem of frost forming in an ultra-low temperature warehouse due to defrosting in a fan, the present application provides an anti-frost type fan and an anti-frost method for an ultra-low temperature warehouse.

[0005] The present invention provides an anti-frost type fan for an ultra-low temperature warehouse, which adopts the following technical solution:

[0006] An anti-frost fan for an ultra-low temperature warehouse comprises a shell, a fan body and a defrost device arranged in the shell, an air outlet arranged at a high position of the shell, and a return air outlet arranged at a low position of the shell, wherein the fan body is driven by an AC motor, the air outlet and the return air outlet are both used to extend into the ultra-low temperature warehouse, a shutter assembly is arranged at the air outlet, and the shutter assembly is used to open and close the air outlet, a water receiving box is arranged in the shell, the water receiving box is arranged at the bottom of the shell and is used to receive condensed water, and a drain outlet is provided at the bottom of the water receiving box.

[0007] Preferably, the casing includes a fan section, a functional section and a return air section which are connected in sequence, the air outlet is opened at the outer end of the fan section, the fan body is arranged in the fan section, the defrost device and the water collecting box are arranged in the functional section, and the return air outlet is opened at the end of the return air section.

[0008] Preferably, a water inlet is provided at the top of the water receiving box, and a baffle is movably provided at the water inlet, the baffle is used to open and close the water inlet, and the baffle is closed when the shutter assembly is opened and opened when the shutter assembly is closed.

[0009] Preferably, a blocking block is movably provided at the bottom of the drain outlet, and the blocking block is used to open and close the drain outlet, and the blocking block is closed when the baffle is opened, and is opened when the baffle is closed.

[0010] Preferably, an electric cylinder is provided at the bottom of the functional section, and the electric cylinder includes a cylinder body provided at the bottom of the functional section and a telescopic rod extending upward into the interior of the functional section, an end of the telescopic rod away from the cylinder body is connected to a first connecting rod, and the telescopic rod is connected to the baffle through the first connecting rod.

[0011] Preferably, a second connecting rod is connected between the first connecting rod and the blocking block.

[0012] Preferably, the shutter assembly includes a plurality of blades, a synchronous wheel is connected to the bottom of each of the blades, a synchronous belt is connected between the plurality of synchronous wheels, one of the synchronous wheels is coaxially connected to a gear, a slide rail is provided at the bottom of the fan section, a rack is slidably provided on the slide rail, the rack is meshed with the gear, a third connecting rod is movably connected between the first connecting rod and the rack, and both ends of the third connecting rod are respectively hinged on the first connecting rod and the rack.

[0013] Preferably, a first slope is provided on the outer top surface of the water receiving box, and a lower position of the first slope is connected to the water receiving port.

[0014] Preferably, a second slope is provided on the inner bottom surface of the water receiving box, and a lower position of the second slope is connected to the drain outlet.

[0015] The present invention provides an anti-frost method based on the anti-frost fan for the ultra-low temperature warehouse, which adopts the following technical scheme:

[0016] A frosting prevention method comprises the following steps: closing the fan body and the air outlet when defrosting the fan, using the water receiving box to collect condensed water formed by the temperature difference after defrosting, and reopening the fan body and the air outlet after completing the above steps.

[0017] The beneficial effects of the present invention are:

[0018] 1. Before the fan is defrosted, the fan body is shut down and the shutter assembly is closed. The water vapor density generated during the defrosting process is relatively small, so the water vapor will form a local accumulation on the top of the shell, making it impossible for the water vapor to escape from the high air outlet or the low return air outlet. After the defrosting is completed, the temperature inside the fan gradually drops, causing the water vapor to form condensed water and collect in the water receiving box and be discharged through the drain port. Finally, the shutter assembly is reopened and the fan body is restarted, effectively avoiding the frost in the ultra-low temperature warehouse caused by the escape of water vapor into the ultra-low temperature warehouse during the defrosting process of the fan;

[0019] 2. After the shutter assembly is closed for defrosting, condensed water can enter the water receiving box due to the opening of the baffle. When the shutter is opened for air discharge, the baffle can isolate the water in the water receiving box that has not been drained in time from the wind flow, reducing the water brought into the ultra-low temperature warehouse, thereby further preventing frost from forming in the ultra-low temperature warehouse;

[0020] 3. When the baffle is opened for defrosting, the drain port is close to the heat source. The blocking block closes the drain port to prevent the temperature from escaping from the drain port and improve the defrosting efficiency. When the baffle is closed for air discharge, the blocking block opens the drain hole to discharge the condensed water in the water box.

[0021] 4. The electric cylinder can simultaneously control the activities of the shutter assembly, the baffle and the blocking block, so that the blocking block closes as the baffle opens and opens as the baffle closes, and the baffle closes as the shutter assembly opens and opens as the shutter assembly closes, thereby simplifying the mechanism and reducing the number of driving parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of an anti-frost type fan in an ultra-low temperature storage in a defrosting state in an embodiment of the present application;

[0023] Figure 2 This is an external structural diagram of the anti-frost type fan in the defrosting state in the embodiment of the present application;

[0024] Figure 3 This is a diagram of the internal structure of the anti-frost type fan in the defrosting state in the embodiment of the present application;

[0025] Figure 4 It is a schematic diagram of an anti-frost type fan in an air outlet state used in an ultra-low temperature storage in an embodiment of the present application;

[0026] Figure 5 This is an external structural diagram of the anti-frost type fan in the embodiment of the present application when it is in the air outlet state;

[0027] Figure 6 This is a diagram of the internal structure of the anti-frost type fan in the embodiment of the present application when it is in the air outlet state;

[0028] Explanation of the reference numerals: 11. fan section; 12. functional section; 13. return air section; 2. air outlet; 3. fan body; 4. defrost device; 5. blades; 51. synchronous wheel; 52. synchronous belt; 53. tensioning wheel; 54. gear; 55. slide rail; 56. rack; 6. water collecting box; 61. baffle; 7. drain outlet; 71. sealing block; 8. electric cylinder; 91. first connecting rod; 92. second connecting rod; 93. third connecting rod; 10. side wall of ultra-low temperature storage. DETAILED DESCRIPTION

[0029] The following will be combined with the attached Figure 1 -Attached Figure 6 The present invention is further illustrated by the following embodiments.

[0030] This embodiment discloses an anti-frost fan for an ultra-low temperature storage.

[0031] Reference Figures 1 to 6 The anti-frost fan for the ultra-low temperature storage includes a shell, a fan body 3 and a defrost device 4 arranged in the shell, an air outlet 2 arranged at a high position of the shell, and a return air outlet arranged at a low position of the shell. The air outlet 2 and the return air outlet are both used to extend into the ultra-low temperature storage. A shutter assembly is arranged at the air outlet 2, and the shutter assembly is used to open and close the air outlet 2. A water receiving box 6 is arranged in the shell, and the water receiving box 6 is arranged at the bottom of the shell for receiving condensed water. A drain port 7 is provided at the bottom of the water receiving box 6. Through the above-mentioned arrangement, before the fan performs defrosting, the fan body 3 is shut down and the shutter assembly is closed. The water vapor density generated during the defrosting process is relatively small, so the water vapor will form a local accumulation on the top of the outer shell, making it impossible for the water vapor to escape from the high air outlet 2 or the low return air outlet. After the defrosting is completed, the temperature in the fan gradually decreases, causing the water vapor to form condensed water and collect in the water collecting box 6 and be discharged through the drain port 7. Finally, the shutter assembly is reopened and the fan body 3 is started again, effectively avoiding the frost in the ultra-low temperature warehouse caused by the escape of water vapor into the ultra-low temperature warehouse during the defrosting process of the fan.

[0032] It should be noted that, in the present embodiment, the fan body 3 is driven by an AC motor, and the pure motor structure without circuit drive inside the AC motor is utilized to solve the problem that the electronic components are not resistant to low temperatures. The AC 50HZ frequency phase switching is used to realize the motor rotation. Moreover, when the AC motor is frozen at low temperature, the working efficiency is low due to the principle of its own motor structure, and it is easy to generate heat, which can just avoid the problem of the low-temperature motor solidifying and getting stuck.

[0033] Reference Figure 2 and Figure 3The housing includes a fan section 11, a functional section 12 and a return air section 13 connected in sequence, wherein the air outlet 2 is opened at the outer end of the fan section 11, the fan body 3 is arranged in the fan section 11, the defrost device 4 and the water receiving box 6 are arranged in the functional section 12, and the return air outlet is opened at the end of the return air section 13. In this embodiment, the defrost device 4 is an electric heater.

[0034] Reference Figure 3 and Figure 6 A water inlet is provided at the top of the water receiving box 6, and a baffle 61 is movably provided at the water inlet. The baffle 61 is used to open and close the water inlet. The opening and closing state of the baffle 61 is opposite to the opening and closing state of the shutter assembly, that is, the baffle 61 is closed when the shutter assembly is opened, and is opened when the shutter assembly is closed. The purpose is that after the shutter assembly is closed for defrosting, condensed water can enter the water receiving box 6 due to the opening of the baffle 61. When the shutter is opened for air outlet, the baffle 61 can isolate the moisture in the water receiving box 6 that has not been drained in time from the wind flow, reduce the moisture brought into the ultra-low temperature warehouse, and further prevent frost from occurring in the ultra-low temperature warehouse.

[0035] Reference Figure 3 and Figure 6 A blocking block 71 is movably provided at the bottom of the drain outlet 7. The blocking block 71 is used to open and close the drain outlet 7. The opening and closing state of the blocking block 71 is opposite to the opening and closing state of the baffle 61, that is, the blocking block 71 is closed when the baffle 61 is opened, and is opened when the baffle 61 is closed. The purpose is: when the baffle 61 is opened for defrosting, the drain outlet 7 is close to the heat source, and the blocking block 71 closes the drain outlet 7 to prevent the temperature from escaping from the drain outlet 7 and improve the defrosting efficiency. When the baffle 61 is closed for air discharge, the blocking block 71 opens the drain hole to discharge the condensed water in the water receiving box 6.

[0036] Reference Figure 3 and Figure 6 , a telescopic control member is provided at the bottom of the functional section 12. In this embodiment, the telescopic control member is an electric cylinder 8. The electric cylinder 8 includes a cylinder body provided at the bottom of the functional section 12 and a telescopic rod extending upwardly through the interior of the functional section 12. The end of the telescopic rod away from the cylinder body is connected to a first connecting rod 91. The telescopic rod is connected to the baffle 61 through the first connecting rod 91, so that the electric cylinder 8 can control the baffle 61 to move up and down. Furthermore, a second connecting rod 92 is connected between the first connecting rod 91 and the blocking block 71. The second connecting rod 92 is an L-shaped rod. On the one hand, the electric cylinder 8 can control the blocking block 71 to move. On the other hand, only one telescopic driving member is used to realize the process of closing the blocking block 71 as the baffle 61 is opened and opening the blocking block 71 as the baffle 61 is closed, thereby achieving the effect of simplifying the mechanism and reducing the number of driving members.

[0037] Reference Figure 3 and Figure 6The shutter assembly includes a plurality of blades 5, which are arranged horizontally at the air outlet 2, and each blade 5 is arranged at the air outlet 2 to rotate around a vertical axis. Further, a synchronous wheel 51 is connected to the bottom of each blade 5, a synchronous belt 52 is connected between the plurality of synchronous wheels 51, and a tensioning wheel 53 for tensioning the synchronous belt 52 is also arranged between adjacent synchronous wheels 51, so that the plurality of blades 5 can rotate synchronously. A gear 54 is coaxially connected to one of the synchronous wheels 51, and a slide rail 55 is arranged at the bottom of the fan section 11, and a rack 56 is slidably arranged on the slide rail 55, and the rack 56 is meshed with the gear 54. In addition, a third connecting rod 93 is movably connected between the first connecting rod 91 and the rack 56, that is, both ends of the third connecting rod 93 are respectively hinged on the first connecting rod 91 and the rack 56. On the one hand, the electric cylinder 8 can control the opening and closing of the shutter assembly. On the other hand, the telescopic driving component simultaneously realizes the process of closing the baffle 61 as the shutter assembly opens and opening as the shutter assembly closes, thereby further achieving the effect of simplifying the mechanism and reducing the number of driving components.

[0038] In summary, the electric cylinder 8 as a telescopic drive has two control processes: one is that the synchronous belt 52 moves the baffle 61 to rise and open, drives the blocking block 71 to rise and close, and drives the shutter assembly to rotate and close; the other is that the synchronous belt 52 moves the baffle 61 to lower and close, drives the blocking block 71 to lower and open, and drives the shutter assembly to rotate and open. It should be noted that the hole at the bottom of the water receiving box 6 through which the telescopic rod of the electric cylinder 8 passes is provided with a sliding sealing structure to reduce the situation where condensed water leaks directly from this place.

[0039] Reference Figure 3 and Figure 6 In order to further facilitate water collection by the water receiving box 6, a first slope is provided on the outer top surface of the water receiving box 6, and the lower position of the first slope is connected to the water receiving port. In order to further facilitate drainage of the drain port 7, a second slope is provided on the inner bottom surface of the water receiving box 6, and the lower position of the second slope is connected to the drain port 7.

[0040] This embodiment also discloses an anti-frost method based on the anti-frost fan used in the ultra-low temperature storage.

[0041] The anti-frost method includes the following steps: closing the fan body 3 and the air outlet 2 when defrosting the fan, using the water collecting box 6 to collect condensed water formed by the temperature difference after defrosting, and reopening the fan body 3 and the air outlet 2 after completing the above steps.

[0042] The above are all preferred embodiments of the present invention, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An anti-frost fan for ultra-low temperature storage, characterized in that: The invention comprises a shell, a fan body (3) and a defrosting device (4) arranged in the shell, an air outlet (2) arranged at a high position of the shell, and a return air outlet arranged at a low position of the shell, wherein the fan body (3) is driven by an AC motor, the air outlet (2) and the return air outlet are both used to extend into an ultra-low temperature warehouse, a shutter assembly is arranged at the air outlet (2), and the shutter assembly is used to open and close the air outlet (2), a water receiving box (6) is arranged in the shell, and the water receiving box (6) is arranged at the bottom of the shell for receiving condensed water, and a drainage outlet (7) is provided at the bottom of the water receiving box (6); The housing comprises a fan section (11), a functional section (12) and a return air section (13) which are connected in sequence, the air outlet (2) is arranged at the outer end of the fan section (11), the fan body (3) is arranged in the fan section (11), the defrost device (4) and the water receiving box (6) are arranged in the functional section (12), and the return air outlet is arranged at the end of the return air section (13); The water receiving box (6) has a water receiving port at the top, and a baffle (61) is movably provided at the water receiving port. The baffle (61) is used to open and close the water receiving port. The baffle (61) is closed when the shutter assembly is opened, and is opened when the shutter assembly is closed. A blocking block (71) is movably provided at the bottom of the drain outlet (7), and the blocking block (71) is used to open and close the drain outlet (7); the blocking block (71) is closed when the baffle (61) is opened, and is opened when the baffle (61) is closed; An electric cylinder (8) is arranged at the bottom of the functional section (12), and the electric cylinder (8) comprises a cylinder body arranged at the bottom of the functional section (12) and a telescopic rod penetrating upward into the interior of the functional section (12), an end of the telescopic rod away from the cylinder body being connected to a first connecting rod (91), and the telescopic rod is connected to the baffle (61) via the first connecting rod (91); A second connecting rod (92) is connected between the first connecting rod (91) and the blocking block (71); The inner bottom surface of the water receiving box (6) is provided with a second slope, and the lower position of the second slope is connected to the drain outlet (7).

2. The anti-frost fan for ultra-low temperature storage according to claim 1 is characterized in that: The shutter assembly comprises a plurality of blades (5), each of the blades (5) being connected to a synchronous wheel (51) at the bottom, a synchronous belt (52) being connected between the plurality of synchronous wheels (51), one of the synchronous wheels (51) being coaxially connected to a gear (54), a slide rail (55) being provided at the bottom of the fan section (11), a rack (56) being slidably provided on the slide rail (55), the rack (56) being meshed with the gear (54), a third connecting rod (93) being movably connected between the first connecting rod (91) and the rack (56), the two ends of the third connecting rod (93) being respectively hinged to the first connecting rod (91) and the rack (56).

3. The anti-frost fan for ultra-low temperature storage according to claim 1 is characterized in that: The outer top surface of the water receiving box (6) is provided with a first slope, and the lower position of the first slope is connected to the water receiving port.

4. An anti-frost method based on the anti-frost fan for ultra-low temperature storage according to any one of claims 1 to 3, characterized in that: The following steps are involved: When the fan is defrosted, the fan body (3) and the air outlet (2) are closed, and after defrosting, the water receiving box (6) is used to collect condensed water formed due to the temperature difference. After completing the above steps, the fan body (3) and the air outlet (2) are reopened.

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