A commercial refrigerator and method of using the same

Abstract

The application relates to the technical field of refrigerators, in particular to a commercial refrigerator and a use method thereof. The commercial refrigerator comprises a refrigerator body, two guide rails are fixed to one side of the interior of the refrigerator body, a sliding door is slidably arranged on the upper side of each of the two guide rails, and a plurality of air curtain generating mechanisms are arranged at one end of the guide rail on the outer side and the other end of the guide rail on the inner side. According to the application, the plurality of air curtain generating mechanisms are arranged at one end of the guide rail, and a gas pressing mechanism is arranged. When the sliding door is slid open, the air curtain generating mechanisms located at the opening position can spray air curtains upwards, the air curtains can effectively block the convection of cold and hot air on the inner and outer sides of the guide rail, the loss of cold air on the inner side of the guide rail can be greatly reduced, the energy consumption of the guide rail can be effectively reduced, and in addition, the blocking effect of the air curtains can prevent dust from the outside from entering the inner side of the guide rail, thereby avoiding the pollution of the goods on the inner side of the guide rail.

Description

Technical Field

[0001] This invention relates to the field of freezer technology, and in particular to a commercial freezer and its usage method. Background Technology

[0002] A freezer consists of a cabinet and a door. The cabinet includes an outer shell and an inner liner. The freezer is equipped with a refrigeration system that releases cold air into the inner liner to freeze the items inside.

[0003] In actual use, existing commercial freezers require frequent loading and unloading of items. Each time items are loaded or unloaded, the freezer door must be opened and closed. Each time the door is opened and closed, it causes convection between the hot and cold air inside and outside the freezer. This results in the cold air inside the freezer escaping outward and the hot air outside entering the freezer. Each time the door is opened and closed, the temperature inside the freezer rises. In order to maintain the low temperature, the freezer needs to increase its power for cooling, which leads to increased energy consumption. Summary of the Invention

[0004] The purpose of this invention is to provide a commercial freezer and its usage method to solve the problems mentioned in the background art.

[0005] The technical solution of the present invention is as follows: a commercial refrigerator includes a refrigerator body, two guide rails are fixed on one side of the refrigerator body, and a sliding door is slidably provided on the upper side of each of the two guide rails. Multiple air curtain generating mechanisms are provided at one end of the outer guide rail and the other end of the inner guide rail. Each air curtain generating mechanism includes an air duct, a guide hole, and an air outlet opened inside the guide rail. The air outlet and the air duct are connected, and the air duct and the guide hole are connected. A sliding rod is slidably inserted inside the guide hole, and a ventilation hole is opened inside the sliding rod. The invention also includes an air compressor mechanism for providing high-pressure air to the multiple air curtain generating mechanisms.

[0006] Preferably, the air compression mechanism includes two air chambers located inside the two guide rails, an air pump and an air tank located on the outside of the freezer body. The air outlet of the air pump is connected to the inside of the air tank. The air outlet of the air tank is connected to an air pipe and a diverter pipe. One end of the diverter pipe extends to the inside of the two air chambers, and a connection port is provided on one side of the diverter pipe at the location of the two air chambers. An air pressure adjustment mechanism is connected to the outside of the air tank.

[0007] Preferably, the pressure adjustment mechanism includes a pressure measuring cylinder communicating with the air storage tank. A piston is slidably connected to the inner side of the pressure measuring cylinder. One end of the piston is fixed with a telescopic rod extending to the outside of the pressure measuring cylinder, and one end of the piston is elastically connected to one end of the inner side of the pressure measuring cylinder through a pressure measuring spring. One end of the telescopic rod is fixed with a fixing rod. A start switch and a stop switch are symmetrically installed at the two ends of the pressure measuring cylinder corresponding to the positions of the toggle blocks. The start switch and the stop switch are both electrically connected to the control circuit of the air pump. One end of the fixing rod is fixed with a toggle block for triggering the start switch and the stop switch.

[0008] Preferably, both sliding door surfaces are fixed with guide plates and guide ramps at their lower edges, with one end of the guide ramps smoothly connected to one end of the guide plates.

[0009] Preferably, the upper side of the guide rail is provided with a groove at each air outlet position, and a cover plate for covering the air outlet is slidably connected to the inner side of each groove. An extension rod is fixed through the upper end of each slide rod, and a connecting rod is rotatably connected to both ends of each extension rod. One end of two connecting rods located at the same position is rotatably connected to the upper side of the cover plate at the corresponding position.

[0010] Preferably, each of the slide bars is rotatably connected to a roller at its upper end, the roller being adapted to roll with the lower side of the guide plate and the guide ramp.

[0011] Preferably, each of the slide bars is connected to a return spring at its lower end, and the lower end of the return spring is connected to the inner bottom end of the guide hole.

[0012] Preferably, the guide rail has an exhaust hole at the position corresponding to each guide hole, and the exhaust hole is used to connect the guide hole with the outside.

[0013] This invention also provides a method for using a commercial freezer, comprising the following steps: Step 1: During initial operation, the air pressure inside the air tank is low, and the air pressure inside the pressure measuring cylinder of the air pressure adjustment mechanism is also low. Under the elastic force of the pressure measuring spring, the piston is pushed to the position where the start switch is located. The piston drives the telescopic rod and the fixed rod to move, and the fixed rod drives the lever to move until one end of the lever contacts the start switch. The start switch connects the start signal in the air pump control circuit, controlling the air pump to start running and compressing the outside air into the air tank, causing the air pressure inside the air tank to rise. At the same time, the air pressure inside the pressure measuring cylinder also rises. The air pressure pushes the piston to the position where the stop switch is located and compresses the pressure measuring spring. When the air pressure inside the pressure measuring cylinder reaches a certain value, the lever will contact the stop switch. The stop switch connects the stop signal in the air pump control circuit, thereby controlling the air pump to stop running and maintaining the air pressure inside the pressure measuring cylinder within a certain range. Step 2: When the sliding door is opened to take or place items inside the freezer, the guide plate releases pressure on multiple sliding rods in sequence. The sliding rods are pushed upwards and reset by the elastic force of the return spring at the lower end, causing the vents inside to move upwards until the vents coincide with the air passage. The high-pressure air inside the air chamber flows into the air passage and then is ejected upwards at a relatively high speed through the narrow air outlet to form an air curtain. The air curtain is only located at the opening after the sliding door is opened, and the air curtain blocks the convection of hot and cold air inside and outside the freezer. Step 3: When the sliding rod moves downward under downward pressure, it drives the extension rod to move downward. The extension rod drives the upper ends of the two connecting rods to move vertically downward, causing the two connecting rods to rotate horizontally. The lower ends of the two connecting rods apply an outward thrust to the cover plate, causing the cover plate to move towards the upper side of the air outlet. When the sliding rod moves completely to the lowest point, the cover plate moves exactly above the air outlet, covering and sealing the air outlet.

[0014] This invention provides an improved commercial freezer and its usage method, which, compared with the prior art, has the following improvements and advantages: Firstly, this invention sets up multiple air curtain mechanisms and a compressed air mechanism at one end of the guide rail. When the sliding door is opened, the air curtain generating mechanism located at the opening position can spray air curtains upwards. The air curtains can effectively block the convection of hot and cold air inside and outside the guide rail, thereby significantly reducing the loss of cold air inside the guide rail and thus effectively reducing the energy consumption of the guide rail. In addition, the blocking effect of the air curtains can prevent external dust from entering the inside of the guide rail and prevent contamination of items inside the guide rail.

[0015] Secondly, this invention connects a pressure adjustment mechanism to the air tank in the air compression mechanism. The air pump can be turned on and off according to the air pressure in the air tank. When the air pressure in the air tank decreases, the air pump can be started to compress air into the air tank. Conversely, the air pump can be stopped, thereby maintaining the air pressure in the air tank within a certain range. This, in turn, keeps the air flow rate of the air curtain within a certain range, effectively improving the air curtain's ability to insulate against hot and cold air. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 For the present invention Figure 1 Enlarged structural diagram at point A; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B; Figure 5 This is a partial disassembly diagram of the air compressor mechanism in this invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point D; Figure 7 For the present invention Figure 2 A magnified structural diagram at point C.

[0018] Figure label: 1. Freezer body; 2. Guide rail; 3. Sliding door; 101. Air duct; 102. Guide hole; 103. Slide rod; 104. Air outlet; 105. Vent hole; 106. Return spring; 107. Roller; 108. Exhaust hole; 109. Guide pressure plate; 110. Guide ramp; 201. Slide groove; 202. Cover plate; 203. Extension rod; 204. Connecting rod; 301. Air chamber; 302. Air pump; 303. Air tank; 304. Air pipe; 305. Diverter pipe; 306. Connection port; 401. Pressure measuring cylinder; 402. Piston; 403. Telescopic rod; 404. Pressure measuring spring; 405. Fixing rod; 406. Toggle block; 407. Start switch; 408. Stop switch. Detailed Implementation

[0019] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides an improved commercial refrigerator and its usage method. The technical solution of this invention is as follows: Example 1: like Figures 1 to 7As shown, this embodiment of the invention provides a commercial freezer, including a freezer body 1. Two guide rails 2 are fixed to one side of the interior of the freezer body 1. Sliding doors 3 are slidably mounted on the upper side of each guide rail 2. Multiple air curtain generating mechanisms are provided at one end of the outer guide rail 2 and the other end of the inner guide rail 2. Guide pressure plates 109 and guide ramps 110 are fixed at the lower edge of the surfaces of the two sliding doors 3. One end of the guide ramp 110 is smoothly connected to one end of the guide pressure plate 109. The air curtain generating mechanism includes an air duct 101, a guide hole 102, and an air outlet 104 formed inside the guide rails 2. The air outlet 104 communicates with the air duct 101, and the air duct 101 communicates with the guide hole 102. A slide rod 103 is slidably inserted into the inner side of the hole 102, and a vent hole 105 is opened inside the slide rod 103; it also includes an air compressor mechanism that provides high-pressure air to multiple air curtain generating mechanisms; the air compressor mechanism includes two air chambers 301 opened inside the two guide rails 2, an air pump 302 and an air tank 303 set on the outside of the freezer body 1, the air outlet end of the air pump 302 is connected to the inside of the air tank 303, the air outlet end of the air tank 303 is connected to an air pipe 304 and a diverter pipe 305, one end of the diverter pipe 305 extends to the inside of the two air chambers 301, and a connection port 306 is opened on one side of the diverter pipe 305 at the position of the two air chambers 301, and an air pressure adjustment mechanism is connected to the outside of the air tank 303.

[0021] Furthermore, the air pressure adjustment mechanism includes a pressure measuring cylinder 401 connected to the air storage tank 303. A piston 402 is slidably connected to the inner side of the pressure measuring cylinder 401. One end of the piston 402 is fixed with a telescopic rod 403 extending to the outside of the pressure measuring cylinder 401. One end of the piston 402 is elastically connected to one end of the inner side of the pressure measuring cylinder 401 through a pressure measuring spring 404. One end of the telescopic rod 403 is fixed with a fixing rod 405. A start switch 407 and a stop switch 408 are symmetrically installed at both ends of the pressure measuring cylinder 401 at positions corresponding to the toggle block 406. Both the start switch 407 and the stop switch 408 are electrically connected to the control circuit of the air pump 302. One end of the fixing rod 405 is fixed with a toggle block 406 for triggering the start switch 407 and the stop switch 408. The air pump 302 can be turned on and off according to the air pressure in the air tank 303. When the air pressure in the air tank 303 decreases, the air pump 302 can be started to compress air into the air tank 303. Conversely, the air pump 302 can be stopped to maintain the air pressure in the air tank 303 within a certain range, thereby keeping the air flow rate of the air curtain within a certain range and effectively improving the air curtain's ability to insulate against hot and cold air.

[0022] Furthermore, a groove 201 is provided on the upper side of the guide rail 2 at the position of each air outlet 104. A cover plate 202 for covering the air outlet 104 is slidably connected to the inner side of each groove 201. An extension rod 203 is fixed through the upper end of each slide rod 103. A connecting rod 204 is rotatably connected to both ends of each extension rod 203. One end of two connecting rods 204 located at the same position is rotatably connected to the upper side of the cover plate 202 at the corresponding position. When the slide rod 103 moves downward under downward pressure, it will drive the extension rod 203 to move downward. The extension rod 203 will drive the upper ends of the two connecting rods 204 to move vertically downward, causing the two connecting rods 204 to rotate horizontally. The lower ends of the two connecting rods 204 can apply an outward pushing force to the cover plate 202, causing the cover plate 202 to move towards the upper side of the air outlet 104. When the slide rod 103 moves completely to the lowest point, the cover plate 202 can move exactly above the air outlet 104, covering and sealing the air outlet 104 to prevent external impurities from entering the air outlet 104.

[0023] Furthermore, each slide bar 103 is rotatably connected to a roller 107 at its upper end, and the roller 107 is used to roll and adapt to the lower side of the guide plate 109 and the guide ramp 110. When the sliding door 3 moves, the roller 107 can roll along the lower side of the guide plate 109 and the guide ramp 110, reducing resistance and allowing the slide bar 103 to move smoothly up and down.

[0024] Furthermore, an exhaust hole 108 is provided inside the guide rail 2 at the position corresponding to each guide hole 102. The exhaust hole 108 is used to connect the guide hole 102 with the outside. When the slide rod 103 moves up and down inside the guide hole 102, the air inside the guide hole 102 can be connected to the outside through the exhaust hole 108, preventing the air pressure from affecting the smooth up and down movement of the slide rod 103 inside the guide hole 102.

[0025] Example 2: This implementation also provides a method for using a commercial freezer, including the following steps: Step 1: During initial operation, the internal air pressure of the air tank 303 is low, and the internal air pressure of the pressure measuring cylinder 401 of the air pressure adjustment mechanism is also low. Under the elastic force of the pressure measuring spring 404, the piston 402 is pushed to move towards the position of the start switch 407. The piston 402 drives the telescopic rod 403 and the fixed rod 405 to move. The fixed rod 405 drives the toggle block 406 to move until one end of the toggle block 406 contacts the start switch 407. The start switch 407 connects the start signal in the control circuit of the air pump 302, controlling the air pump 302 to start running and dissipate external air pressure. Air is compressed into the inside of the air tank 303, increasing the air pressure inside the air tank 303. At the same time, the air pressure inside the pressure measuring cylinder 401 also increases. The air pressure pushes the piston 402 to move towards the end where the stop switch 408 is located and compresses the pressure measuring spring 404. When the air pressure inside the pressure measuring cylinder 401 reaches a certain value, the toggle block 406 will contact the stop switch 408. The stop switch 408 connects the stop signal in the control circuit of the air pump 302, thereby controlling the air pump 302 to stop running and maintaining the air pressure inside the pressure measuring cylinder 401 within a certain range. Step 2: When the sliding door 3 is slid open to take or put items inside the freezer body 1, the guide plate 109 releases the downward pressure on multiple sliding rods 103 in sequence. The sliding rods 103 are pushed upward and reset under the elastic force of the lower return spring 106, which drives the vent 105 inside to move upward until the vent 105 coincides with the air passage 101. The high-pressure air inside the air chamber 301 flows into the air passage 101 and then sprays upward at a relatively fast flow rate through the narrow air outlet 104 to form an air curtain. The air curtain is only located at the opening after the sliding door 3 is slid open. The air curtain blocks the convection of hot and cold air inside and outside the freezer body 1. Step 3: When the slide rod 103 moves downward under downward pressure, it drives the extension rod 203 to move downward. The extension rod 203 drives the upper ends of the two connecting rods 204 to move vertically downward, causing the two connecting rods 204 to rotate horizontally. The lower ends of the two connecting rods 204 apply an outward pushing force to the cover plate 202, causing the cover plate 202 to move above the air outlet 104. When the slide rod 103 moves completely to the lowest point, the cover plate 202 moves exactly above the air outlet 104, covering and sealing the air outlet 104.

[0026] Working principle: During initial operation, the air pressure inside the air tank 303 is low, therefore the air pressure inside the pressure measuring cylinder 401 of the air pressure adjustment mechanism is also low. Under the elastic force of the pressure measuring spring 404, the piston 402 is pushed to move towards the position where the start switch 407 is located. The piston 402 drives the telescopic rod 403 and the fixed rod 405 to move. The fixed rod 405 drives the toggle block 406 to move until one end of the toggle block 406 contacts the start switch 407, triggering the start switch 407. The start switch 407 connects the start signal in the control circuit of the air pump 302, which controls the air pump 302 to start running and compress the external air to the storage tank. Inside the gas tank 303, the air pressure inside the gas tank 303 increases, and at the same time, the air pressure inside the pressure measuring cylinder 401 also increases. The air pressure pushes the piston 402 to move towards the end where the stop switch 408 is located and compresses the pressure measuring spring 404. When the air pressure inside the pressure measuring cylinder 401 reaches a certain value, the toggle block 406 will contact the stop switch 408, thereby triggering the stop switch 408. The stop switch 408 connects the stop signal in the control circuit of the air pump 302, thereby controlling the air pump 302 to stop running, so that the air pressure inside the pressure measuring cylinder 401 is maintained within a certain range, thereby ensuring the stability of the generated air curtain flow rate. High-pressure air inside the air tank 303 in the air compressor flows into the inside of the diversion pipe 305 through the air pipe 304, and then flows into the inside of the two air chambers 301 through the two connection ports 306 on one side of the diversion pipe 305. The air inside the two air chambers 301 supplies air to the multiple air curtain generating mechanisms located on the two guide rails 2. When the sliding door 3 slides to the end, it can completely close the refrigerator body 1. At the same time, the guide pressure plate 109 located on the lower side of the sliding door 3 applies a downward pushing force to the sliding rods 103 in the multiple air curtain generating mechanisms, causing the sliding rods 103 in each air curtain generating mechanism to move down to the lowest point and compress the return spring 106. The sliding rods 103 in the air curtain generating mechanism drive the vent 105 inside to move down to the lowest point, so that the vent 105 does not overlap with the air passage 101. Therefore, the air passage 101 is blocked, and the high-pressure air inside the air chamber 301 cannot flow to the air outlet 104 through the air passage 101. At this time, the air outlet 104 will not spray air curtains upward. When the sliding door 3 is opened to retrieve or place items inside the freezer body 1, the guide plate 109 sequentially releases downward pressure on multiple sliding rods 103. When the upper end of the sliding rod 103 is no longer under downward pressure, it is pushed upward and reset by the elastic force of the lower end return spring 106, thereby causing the internal vent 105 to move upward until the vent 105 coincides with the air passage 101. The high-pressure air inside the air chamber 301 can flow into the air passage 101 and then be ejected upward at a relatively high flow rate through the narrow air outlet 104. Furthermore, the air outlet 104 is a long and thin strip shape, which can make the ejected airflow form an air curtain above the guide rail 2. The air curtain is only located at the opening after the sliding door 3 is slid open. The air curtain can effectively block the convection of hot and cold air inside and outside the freezer body 1, thereby greatly reducing the loss of cold air inside the freezer body 1, thus effectively reducing the energy consumption of the freezer body 1. In addition, the blocking effect of the air curtain can prevent external dust from entering the inside of the freezer body 1, preventing contamination of the items inside the freezer body 1, and improving the hygiene of the freezer body 1. To prevent debris from entering the air outlet 104 and the inner side of the air passage 101 and affecting the uniformity of the air curtain, a sliding groove 201 is provided on the upper side of the air outlet 104. A cover plate 202 is slidably installed on the inner side of the sliding groove 201. When the sliding rod 103 is subjected to downward pressure and moves downward, it will drive the extension rod 203 to move downward. The extension rod 203 drives the upper ends of the two connecting rods 204 to move vertically downward, causing the two connecting rods 204 to rotate horizontally. The lower ends of the two connecting rods 204 can apply an outward thrust to the cover plate 202, causing the cover plate 202 to move towards the upper side of the air outlet 104. When the sliding rod 103 moves completely to the lowest point, the cover plate 202 can move exactly above the air outlet 104, covering and sealing the air outlet 104 to prevent external impurities from entering the air outlet 104.

[0027] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A commercial freezer, comprising a freezer body (1), characterized in that, Two guide rails (2) are fixed on one side of the interior of the freezer body (1). Sliding doors (3) are slidably provided on the upper side of the two guide rails (2). Multiple air curtain generating mechanisms are provided at one end of the outer guide rail (2) and the other end of the inner guide rail (2). The air curtain generating mechanism includes an air passage (101), a guide hole (102), and an air outlet (104) inside the guide rail (2). The air outlet (104) is connected to the air passage (101), and the air passage (101) is connected to the guide hole (102). A slide rod (103) is slidably inserted into the inner side of the guide hole (102), and a ventilation hole (105) is opened inside the slide rod (103). It also includes an air compressor that provides high-pressure air to multiple air curtain generating mechanisms.

2. A commercial freezer according to claim 1, characterized in that: The air compression mechanism includes two air chambers (301) located inside the two guide rails (2), an air pump (302) located on the outside of the freezer body (1), and an air tank (303). The air outlet of the air pump (302) is connected to the inside of the air tank (303). The air outlet of the air tank (303) is connected to an air pipe (304) and a diverter pipe (305). One end of the diverter pipe (305) extends to the inside of the two air chambers (301), and a connection port (306) is provided on one side of the diverter pipe (305) at the position of the two air chambers (301). An air pressure adjustment mechanism is connected to the outside of the air tank (303).

3. A commercial freezer according to claim 2, characterized in that: The pressure adjustment mechanism includes a pressure measuring cylinder (401) connected to the air storage tank (303). A piston (402) is slidably connected to the inner side of the pressure measuring cylinder (401). One end of the piston (402) is fixed with a telescopic rod (403) extending to the outside of the pressure measuring cylinder (401). One end of the piston (402) is elastically connected to one end of the inner side of the pressure measuring cylinder (401) through a pressure measuring spring (404). One end of the telescopic rod (403) is fixed with a fixing rod (405). A start switch (407) and a stop switch (408) are symmetrically installed at both ends of the pressure measuring cylinder (401) at positions corresponding to the toggle block (406). The start switch (407) and the stop switch (408) are both electrically connected to the control circuit of the air pump (302). One end of the fixing rod (405) is fixed with a toggle block (406) for triggering the start switch (407) and the stop switch (408).

4. A commercial freezer according to claim 1, characterized in that: Both sliding doors (3) have a guide plate (109) and a guide ramp (110) fixed at the lower edge of their surfaces. One end of the guide ramp (110) is smoothly connected to one end of the guide plate (109).

5. A commercial freezer according to claim 1, characterized in that: The upper side of the guide rail (2) is provided with a groove (201) at the position of each air outlet (104). The inner side of each groove (201) is slidably connected with a cover plate (202) for covering the air outlet (104). The upper end of each slide rod (103) is fixed with an extension rod (203). Both ends of each extension rod (203) are rotatably connected with a connecting rod (204). One end of the two connecting rods (204) located at the same position is rotatably connected to the upper side of the cover plate (202) at the corresponding position.

6. A commercial freezer according to claim 1, characterized in that: Each of the slide bars (103) has a roller (107) rotatably connected to its upper end, the roller (107) being adapted to roll with the lower side of the guide plate (109) and the guide ramp (110).

7. A commercial freezer according to claim 1, characterized in that: Each of the slide bars (103) is connected to a return spring (106) at its lower end, and the lower end of the return spring (106) is connected to the inner bottom end of the guide hole (102).

8. A commercial freezer according to claim 1, characterized in that: The guide rail (2) has an exhaust hole (108) at the position corresponding to each guide hole (102) inside, and the exhaust hole (108) is used to connect the guide hole (102) with the outside.

9. A method of using a commercial freezer, the commercial freezer according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: During initial operation, the internal air pressure of the gas storage tank (303) is low, and the internal air pressure of the pressure measuring cylinder (401) of the air pressure adjustment mechanism is also low. Under the elastic force of the pressure measuring spring (404), the piston (402) is pushed to move towards the position of the start switch (407). The piston (402) drives the telescopic rod (403) and the fixed rod (405) to move. The fixed rod (405) drives the toggle block (406) to move until one end of the toggle block (406) contacts the start switch (407). The start switch (407) connects the start signal in the control circuit of the air pump (302), controlling the air pump (302) to start running. External air is compressed into the inside of the air tank (303), causing the air pressure inside the air tank (303) to rise. At the same time, the air pressure inside the pressure measuring cylinder (401) also rises. The air pressure pushes the piston (402) to move towards the end where the stop switch (408) is located and compresses the pressure measuring spring (404). When the air pressure inside the pressure measuring cylinder (401) reaches a certain value, the toggle block (406) will contact the stop switch (408). The stop switch (408) connects the stop signal in the control circuit of the air pump (302), thereby controlling the air pump (302) to stop running and keeping the air pressure inside the pressure measuring cylinder (401) within a certain range. Step 2: When the sliding door (3) is opened to take or put items into the refrigerator body (1), the guide plate (109) releases the downward pressure on multiple sliding rods (103) in sequence. The sliding rods (103) are pushed up and reset under the elastic force of the lower end reset spring (106), which drives the vent (105) inside to move upward until the vent (105) coincides with the air passage (101). The high-pressure air inside the air chamber (301) flows into the air passage (101) and then sprays upward at a relatively fast flow rate through the narrow air outlet (104) to form an air curtain. The air curtain is only located at the opening after the sliding door (3) is opened. The air curtain blocks the convection of hot and cold air inside and outside the refrigerator body (1). Step 3: When the slide rod (103) moves downward under the downward pressure, it drives the extension rod (203) to move downward. The extension rod (203) drives the upper ends of the two connecting rods (204) to move vertically downward, causing the two connecting rods (204) to rotate horizontally. The lower ends of the two connecting rods (204) apply an outward pushing force to the cover plate (202), causing the cover plate (202) to move to the upper side of the air outlet (104). When the slide rod (103) moves completely to the lowest point, the cover plate (202) moves exactly above the air outlet (104), covering and sealing the air outlet (104).

Images