A refrigeration system used in a commercial refrigeration device

Abstract

A refrigeration system used in a commercial refrigeration device, which comprises a housing of the refrigeration device. A refrigeration system is installed inside the housing. The refrigeration system includes an air outlet duct and a refrigeration box arranged above the air outlet duct. Air ducts are respectively arranged on both sides of the refrigeration box. One end of the air duct is connected to a second air inlet on the refrigeration box, and an air guiding fan is arranged at the other end. First air inlets are respectively formed on both side walls below the air guiding fan. The air in the housing is blown into the refrigeration box by the air guiding fan for cooling, and the cooled air flows out through a second air outlet arranged at the bottom of the refrigeration box. The second air outlet is directly opposite to an arc-shaped baffle arranged in the air outlet duct below, and a first air outlet is arranged below the baffle. A PTC heating module is also arranged directly opposite to the top of the second air inlet above the second air inlet. The invention has many advantages such as simple structure, high efficiency and power saving.

Description

Technical Field

[0001] The invention relates to a refrigeration system used on commercial refrigeration equipment, belonging to the technical field of commercial refrigeration equipment. Background Art

[0002] Commonly used commercial refrigeration equipment uses a fin structure installed in the refrigeration coil, and its air outlet is uneven. Hot air enters from one end of the fin and blows out from the other end to form a refrigeration effect through the refrigeration coil. This refrigeration method causes the temperature in the fin to form a temperature difference with the external space, which can easily lead to frost in the gaps of the fins, thereby greatly reducing its effect. Its commercial refrigeration equipment generally does not have a defrost mode. When frost forms in the commercial refrigeration equipment, it is necessary to cut off the power and heat it through the heating pipe installed at the bottom to let the hot air rise and melt the frost to achieve the defrosting effect. However, after defrosting, there are water droplets everywhere in the refrigerator, which is troublesome to clean. If it is not cleaned thoroughly, it will also cause secondary frost problems, greatly reducing its service life and use effect. For this reason, a refrigeration system used in commercial refrigeration equipment is designed to overcome the above problems. Summary of the invention

[0003] The purpose of the present invention is to design a refrigeration system for commercial refrigeration equipment with a simple structure, convenient use, diverse functions, good refrigeration effect, and no frost after long-term use, in view of the above-mentioned problems.

[0004] The present invention is implemented through the following technical scheme: a refrigeration system used on commercial refrigeration equipment, which includes a refrigeration equipment shell, a refrigeration system installed inside the shell, the refrigeration system including an air outlet duct and a refrigeration box arranged above the air outlet duct, air ducts are respectively arranged on both sides of the refrigeration box, one end of the air duct is connected to a second air inlet on the refrigeration box, and an induced draft fan is arranged on the other end, the induced draft fan is controlled by a separate controller, and the shutdown time of the induced draft fan is later than the shutdown time of the refrigeration box, first air inlets are respectively opened on the two side walls below the induced draft fan, the air in the shell is blown into the refrigeration box for cooling by the induced draft fan, and the cooled air flows out through the second air outlet arranged at the bottom of the refrigeration box, an arc-shaped baffle is arranged in the air outlet duct directly below the second air outlet, a first air outlet is arranged below the baffle, and a PTC heating module is also arranged on the top of the second air inlet directly above the second air inlet.

[0005] Preferably: on both left and right sides inside the air outlet duct, between the air guiding fan and the arc-shaped baffle, swing arms are respectively fixed by rotating shafts. The rotating shafts are driven by a motor to rotate, and two limiting blocks are respectively arranged on both sides of the first air outlet. Notched clamping grooves are arranged on both the limiting blocks and the arc-shaped baffle. The end of the swing arm is provided with a protruding clamping block. By adjusting the angle of the swing arm, the swing arm can be erected at the positions on both sides of the limiting block and the air guiding fan to turn on the strong cooling mode, or the swing arm can be erected at the positions between the arc-shaped baffle and the inner wall of the refrigerating box to turn on the defrosting mode, or one end of the swing arm is erected at the position below the middle of the air guiding fan, and the other end is erected between the limiting block and the arc-shaped baffle to turn on the frost-free mode.

[0006] Preferably: inside the refrigerating box, a plurality of S-shaped coil pipes are arranged in parallel up and down. Adjacent upper and lower coil pipes are arranged in a crosswise manner, and a layer of return air plate with ventilation holes is erected between the upper and lower coil pipes. Air blocking plates are also opened on both side walls of the refrigerating box. Through the return air plate, the arc-shaped baffle, and the air blocking plate, the hot air is fully cooled in the cooler.

[0007] Preferably: the S-shaped coil pipe is integrally bent and formed by a stainless steel pipe. One end is the liquid inlet, and the other end is the liquid outlet. Refrigerating liquid flows in the pipe body. Description of the Drawings

[0008] Figure 1 For the working state of the present invention Figure 1 (Strong cooling mode).

[0009] Figure 2 For the working state of the present invention Figure 2 (Frost-free mode).

[0010] Figure 3 For the working state of the present invention Figure 3 (Defrosting mode). Detailed Embodiment

[0011] To enable those of ordinary skill in the art to more clearly understand the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with the drawings and embodiments.

[0012] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", "vertical", etc. is the orientation or positional relationship based on the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0013] The present invention will be introduced in detail below with reference to the drawings: As Figure 1As shown in the figure, a refrigeration system used in a commercial refrigeration device includes a refrigeration device housing 1, and a refrigeration system 2 is installed inside the housing 1. The refrigeration system 2 includes an air outlet duct 3 and a refrigeration box 4 arranged above the air outlet duct 3. Air ducts 20 are respectively arranged on both sides of the refrigeration box 4. One end of the air duct 20 is connected to the second air inlet 5 on the refrigeration box 4, and an air guiding fan 6 is arranged at the other end. The air guiding fan 6 is controlled by a separate controller (not shown in the figure), and the shutdown time of the air guiding fan 6 is later than the shutdown time of the refrigeration box 4. First air inlets 7 are respectively arranged on both side walls below the air guiding fan 6. The air in the housing 1 is blown into the refrigeration box 4 by the air guiding fan 6 for cooling, and the cooled air flows out through a second air outlet 22 arranged at the bottom of the refrigeration box 4. The second air outlet 22 is directly opposite to an arc-shaped baffle 8 arranged in the air outlet duct 3 below. A first air outlet 9 is arranged below the baffle 8. A PTC heating module 10 is also arranged directly above the second air inlet 5 and opposite to the top of the second air inlet 5.

[0014] Now, when the temperature of the refrigerator reaches a certain value, it enters the power-saving mode, and the refrigeration box enters the shutdown state at this time. When the relatively hot air flow outdoors slowly enters the refrigerator, due to the large temperature difference between the inside and outside, water droplets will appear on the refrigeration coil. When the temperature inside the refrigerator rises to a certain value, the refrigeration box starts working again. At this time, the water droplets in the refrigerator frost due to the restart of the refrigeration box. Over time, serious frosting occurs inside the commercial refrigeration device, greatly affecting the use effect of the commercial refrigeration device. In the present invention, the air guiding fan is provided with a separate controller, and its shutdown time is later than the shutdown time of the refrigeration box. When the refrigeration box enters the shutdown state at this time, the air guiding fan is still in the working state. Therefore, when the relatively hot air flow outdoors enters the refrigerator, under the cooling of the air guiding fan, the air inside the refrigerator still circulates, thus slowly reducing the temperature difference between the inside and outside, avoiding the generation of water droplets, and because of continuous air supply, even if there are water droplets, they will be blown off, thus greatly reducing the probability of frosting inside the refrigerator. Compared with general commercial refrigeration devices, it has a longer service life and better refrigeration effect.

[0015] On both the left and right sides within the air outlet duct 3, between the air induction fan 6 and the arc-shaped baffle 8, swing arms 11 are respectively fixed by a rotating shaft 21. The rotating shaft 21 is driven to rotate by a motor (not shown in the figure), and two limiting blocks 12 are respectively arranged on both sides of the first air outlet 9. A clamping groove 14 with a notch 13 is arranged on both the limiting block 12 and the arc-shaped baffle 8. A protruding clamping block 15 is arranged at the end of the swing arm 11. By adjusting the angle of the swing arm 11, the swing arm 11 can be erected at the positions on both sides of the limiting block 12 and the second air outlet 22 to turn on the strong cooling mode, or the swing arm can be erected at the positions between the arc-shaped baffle 8 and the inner wall of the refrigeration box 4 to turn on the defrosting mode, or one end of the swing arm 11 is erected at the position below the middle of the air induction fan 6, and the other end is erected between the limiting block 12 and the arc-shaped baffle 8 to turn on the frost-free mode. The specific working principles of its strong cooling, frost-free mode, and defrosting mode are respectively shown in Figure 1 , Figure 2 and Figure 3 .

[0016] In the present invention, a swing arm is provided. This swing arm can set the air outlet channels at the bottom into three air outlet modes. When the swing arm is erected on both the left and right sides of the limiting block and the second air outlet, the hot air directly comes out of the refrigeration box. At this time, it is the strong cooling mode. When one end of the swing arm is between the limiting block and the arc-shaped baffle, and the other end is at the position below the middle of the fan, part of the cold air will be blown to the top inlet together with the fan through the upper and lower notches. At this time, the temperature difference between the top and the outside will gradually become smaller, preventing the formation of water droplets. Then it is the frost-free mode. When the swing arm is connected to the inner wall of the refrigeration box and the arc-shaped baffle, the circulation of the coil in the refrigeration box is closed, and a closed space is formed inside the refrigeration box. At this time, when the PTC heating module and the fan at the top are turned on, the air blown into the refrigeration box is hot air, which can achieve the effect of defrosting. Of course, we can also set a touch switch in the clamping groove on the arc-shaped baffle. When the clamping block of the swing arm is fixed to the clamping groove of the arc-shaped baffle, the touch switch is turned on, controlling the PTC heating module above to work, so as to perform the defrosting mode through the heating block. When the clamping block of the swing arm does not touch the clamping groove of the arc-shaped baffle, the PTC heating module is in the off state. In the defrosting mode, the arc-shaped baffle is used as a water receiving plate to prevent the melted frost from dripping on the corners of the refrigerator, resulting in difficult cleaning problems, and a water outlet that can be opened and closed is arranged at the baffle for regular cleaning. This hot air defrosting method can blow off the water on the coil, effectively solving the problem of incomplete defrosting caused by the conventional method of turning on the heating tube below to melt the frost and allowing it to drip naturally.

[0017] Inside the refrigeration box 4, there are multiple coil pipes 16 arranged in parallel up and down in an S shape. Adjacent upper and lower coil pipes 16 are arranged in a cross pattern, and a return air plate 18 with ventilation holes 17 is installed between the upper and lower coil pipes 16. Wind blocking plates 19 are also provided on both side walls of the refrigeration box 4. Through the return air plate 18, arc-shaped baffle 8, and wind blocking plates 19, the hot air can be fully cooled in the cooler 4. The S-shaped coil pipe 16 is integrally bent and formed from a stainless steel pipe. One end is the liquid inlet, and the other end is the liquid outlet. Refrigerant flows inside the pipe body.

[0018] The arrangement of the coil pipes in the present invention overcomes the problems brought by using conventional finned commercial refrigeration equipment. Because the evaporator with fins needs to be installed piece by piece on the coil pipes during installation, the coil pipes need to be connected through connecting elbows. In this way, the connection methods of threaded fasteners or welding at the connection joints will reduce their sealing performance due to long-term use, resulting in the leakage of the internal coolant, greatly reducing its service life. Moreover, the fins installed on the coil pipes invisibly increase the thickness of the pipe wall, preventing the air from circulating and cooling sufficiently. Through the staggered arrangement, wind blocking plates, arc-shaped wind blocking plates, and air guiding plates in the present invention, the wind has enough time to circulate inside, allowing the hot air to fully transfer heat to the coil pipes, making the overall refrigeration effect of the commercial refrigeration equipment better.

[0019] The specific operation of the present invention is as follows:

[0020] After the commercial refrigeration equipment of the present invention is powered on and operates normally, the two swing arms can be adjusted in angle. When the clamping block protruding from one end of the swing arm is inserted into the card slot on the limit block and the other end is fixed on both sides of the second air outlet, at this time, the wind first enters from the two side first air inlets. Under the action of the air guiding fan, it enters the air inlet of the refrigeration box for refrigeration. After being fully refrigerated in the refrigeration box, it is blown out from the air outlet at the bottom of the refrigeration box. At this time, the commercial refrigeration equipment is in the strong cooling mode, and the specific structure is as Figure 1 .

[0021] When one end of the swing arm is fixed between the limit block and the arc-shaped baffle, and the other end is fixed at the middle position below the air guiding fan, at this time, the natural wind at the first air inlet normally enters through the air guiding fan. Part of the already refrigerated wind will be blown out to the first air outlet, and the other part will be brought in by the air guiding fan through the gaps on both sides. After the blown cold air is mixed with the external natural wind, the temperature of the wind will not be very low, so that the temperature difference above the commercial refrigeration equipment will not be very large and no water droplets will be generated. At this time, the refrigeration equipment is in the frost-free mode, and the specific structure is shown in Figure 2 .

[0022] When the clamping block protruding from one end of the swing arm end is inserted into the card slot of the arc-shaped baffle, and the other end is placed on the wall of the refrigeration box, a closed space is formed below. Through the induction of the induction fan, the air circulates inside the closed space. A touch switch is arranged in the card slot on the arc-shaped baffle. When the touch switch is turned on, it controls the PTC heating module above to work, so as to perform the defrosting mode through the heating block. In the defrosting mode, the arc-shaped baffle is used as a water receiving plate to prevent the melted frost from dripping into the corners of the refrigerator. And an outlet that can be opened and closed is also arranged on one side of the baffle for regular cleaning.

[0023] Compared with the existing commercial refrigeration equipment, the commercial refrigeration equipment of the present invention has the characteristics of controlling its opening through a swing arm and the fan continuing to work when it stops. The commercial refrigeration equipment has more diverse modes, including strong cooling, frost-free and defrosting modes, and more diverse functions. Compared with the existing commercial refrigeration equipment, due to the design that the frost-free mode and the induction fan stop later than the refrigeration box stops, it is not easy to generate frosting problems inside the commercial refrigeration equipment of the present invention, its service life is greatly increased, and the refrigeration effect of the commercial refrigeration equipment will not be reduced after long-term use, thus improving the user experience.

[0024] The specific embodiments described herein are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A refrigeration system used in a commercial refrigeration device, which includes a housing of the refrigeration device, and a refrigeration system is installed inside the housing. It is characterized in that: The refrigeration system includes an air outlet duct and a refrigeration box disposed above the air outlet duct. Air ducts are respectively arranged on both sides of the refrigeration box. One end of the air duct is connected to a second air inlet on the refrigeration box, and an air guiding fan is arranged at the other end. The air guiding fan is controlled by a separate controller, and the shutdown time of the air guiding fan is later than that of the refrigeration box. First air inlets are respectively formed on both side walls below the air guiding fan. The air in the housing is blown into the refrigeration box through the air guiding fan for cooling, and the cooled air flows out through a second air outlet arranged at the bottom of the refrigeration box. The second air outlet is directly opposite to an arc-shaped baffle arranged in the air outlet duct below. A first air outlet is arranged below the baffle. A PTC heating module is further arranged directly above the second air inlet opposite to the top of the second air inlet. Swing arms are respectively fixed on the left and right sides in the air outlet duct between the air guiding fan and the arc-shaped baffle through rotating shafts. The rotating shafts are driven by motors to rotate, and two limit blocks are respectively arranged on both sides of the first air outlet. Notched card slots are arranged on both the limit blocks and the arc-shaped baffle. A protruding card block is arranged at the end of the swing arm. By adjusting the angle of the swing arm, the swing arm can be erected between the limit block and both sides of the air guiding fan to turn on the strong cooling mode, or the swing arm can be erected between the arc-shaped baffle and the inner wall of the refrigeration box to turn on the defrosting mode, or one end of the swing arm is erected below the middle of the air guiding fan and the other end is erected between the limit block and the arc-shaped baffle to turn on the frost-free mode.

2. The refrigeration system used in the commercial refrigeration equipment according to claim 1, characterized in that: A plurality of S-shaped coils arranged in parallel up and down are placed inside the refrigeration box. The adjacent upper and lower coils are arranged in a cross pattern, and a layer of return air plate with ventilation holes is erected between the upper and lower coils. Wind blocking plates are also formed on both side walls of the refrigeration box. The hot air is fully cooled in the refrigerator through the return air plate, the arc-shaped baffle, and the wind blocking plate.

3. The refrigeration system used on the commercial refrigeration equipment according to claim 2, characterized in that: The S-shaped coil is integrally formed by bending a stainless steel pipe. One end thereof is a liquid inlet, and the other end is a liquid outlet. Refrigerant flows in the pipe body.

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