Refrigerated display cabinet with centrifugal fan

Abstract

The invention discloses a refrigerated display cabinet with a centrifugal fan, and relates to the technical field of freezer cabinets; the invention comprises a freezer box body, a centrifugal fan windshield, an evaporator, a centrifugal fan body and a centrifugal fan cover. The invention can first install the centrifugal fan windshield on the evaporator through a second installation screw, and then clamp it on the evaporator through a centrifugal fan base, and install the centrifugal fan body on the centrifugal fan base through a third installation screw. The centrifugal fan body is a direct current centrifugal evaporation fan with 90° turning of inlet and outlet wind, low power and low noise. The centrifugal evaporation fan adopts the spiral Archimedean wind vortex principle to suck low-pressure wind into the spiral wind vortex, and after pressurization, it is strongly thrown out radially to achieve a 90° wind direction change, with small wind resistance, high efficiency and economical price. The centrifugal fan cover is connected to the centrifugal fan base through the third installation screw, and the centrifugal fan windshield can be installed in the inner tank through the first installation screw.

Description

Technical Field

[0001] The invention relates to the technical field of freezers, and in particular to a refrigerated display cabinet with a centrifugal fan. Background Art

[0002] In order to make the temperature inside the cabinet more uniform, refrigerators, display cabinets, wine cabinets and other refrigeration appliances will add evaporative fan disturbance inside the cabinet to make the cold air on the evaporator inside the cabinet flow, so that the temperature inside the cabinet can be cooled faster and more evenly. The evaporative fans commonly used in freezers are generally traditional bearing fans and double ball fans. Due to the limitation of installation space, the air outlet space is generally small. When the air is discharged, it first blows to the top and back, and then rebounds to flow downward along the back. The inlet and outlet angles are 180 degrees. The change in wind direction increases the wind resistance and wind noise. The superposition makes the whole machine dB (A) larger, affecting the product experience. Traditional fans are not only noisy, but also have high power and high cost. The cost of the whole machine with certain energy consumption requirements is high. In response to the above problems, the inventor proposes a refrigerated display cabinet with a centrifugal fan. Summary of the invention

[0003] In order to solve the above technical problems, the present invention adopts the following technical solutions: a refrigerated display cabinet with a centrifugal fan, comprising a display cabinet body, a centrifugal fan assembly and an evaporator, a receiving cavity is formed in the display cabinet body, a rotatably connected cabinet door is provided in front of the display cabinet body, the cabinet door overlaps and seals with the opening of the receiving cavity, the centrifugal fan assembly and the evaporator are both in the receiving cavity, the centrifugal fan assembly is installed on the upper part of the receiving cavity, the centrifugal fan assembly comprises a centrifugal fan base, a centrifugal fan body and a centrifugal fan cover, and the centrifugal fan cover is provided with a An air inlet hole is provided on the centrifugal fan base, the centrifugal fan cover and the centrifugal fan base are close to each other and form a ventilation duct, the centrifugal fan body is located between the centrifugal fan cover and the centrifugal fan base, the air inlet end of the centrifugal fan body is connected to the air inlet, the air outlet end of the centrifugal fan body is connected to the air outlet, the air inlet and the air outlet form an angle of 90 degrees, the centrifugal fan base is fixed on the evaporator, one side of the evaporator is below the air outlet, a wind shield is provided below the centrifugal fan base, and a noise reduction component is provided in the centrifugal fan base.

[0004] Preferably, the windshield comprises a front panel and a support plate, the front panel and the support inclined plate are both provided with a plurality of air guide grilles, and the angle between the support plate and the front panel is 90-120 degrees.

[0005] Preferably, a thermostat is provided on the front panel, and the thermostat is electrically connected to the centrifugal fan body and the evaporator.

[0006] Preferably, an inner liner is fixedly provided inside the display cabinet body, a plurality of shelf seats are provided on the inner liner, a first mounting screw is provided on the front panel, an end portion of the first mounting screw is threadedly fixed to the top of the inner liner, a second mounting screw is threadedly provided on the support plate, and an end portion of the second mounting screw is threadedly fixed to the evaporator.

[0007] Preferably, the evaporator and the centrifugal fan base are fixed by snap-connection, a fixing block is fixedly provided on the outer surface of the centrifugal fan body, the centrifugal fan cover is movably fitted with the centrifugal fan base, a third mounting screw is threadedly inserted on the centrifugal fan base, and the end of the third mounting screw is threadedly inserted on the centrifugal fan base; a noise reduction component is connected inside the centrifugal fan base.

[0008] Preferably, the noise reduction component comprises a sound absorbing plate and a slide groove, and the sound absorbing plate is movably fitted to the inner surface of the centrifugal fan base.

[0009] Preferably, the sound absorbing panel has the same shape as the centrifugal fan base.

[0010] Preferably, three fixing blocks are provided, and the fixing blocks are distributed in a circular array on the outer surface of the centrifugal fan body.

[0011] Preferably, a guide plate is provided at one end of the centrifugal fan cover close to the air outlet, and the guide plate guides the gas to the upper part of the evaporator.

[0012] Preferably, the guide plate has a cross-section in the shape of a quarter arc.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The centrifugal fan cover and the centrifugal fan base are close to each other and form a ventilation duct. The centrifugal fan body is in the middle of the ventilation duct, and the air inlet and the air outlet are at an angle of 90 degrees. The centrifugal fan body adopts the spiral Archimedean vortex principle to inhale the low-pressure hot air mass in the upper space, and after compression and acceleration, the air mass is radially thrown onto the guide plate of the centrifugal fan cover, and then flows to the evaporator. After cooling, it enters the bottom layer of the display cabinet to enter a new cycle to cool the items in the cabinet. The centrifugal fan body realizes a 90° wind direction change, with small wind resistance and low noise;

[0015] 2. The present invention is provided with an inclined wind shield, which can not only block the cold airflow in the cabinet, but also automatically guide the hot airflow with a slightly higher temperature to the top by tilting at a certain angle, forming a benign cooling cycle. Moreover, after tilting the position of the centrifugal fan base, the air outlet can flow to the evaporator more smoothly, reducing the reaction of the airflow impacting the back of the cabinet and reducing noise;

[0016] 3. The present invention presses the card block into the square groove, slides the slider connected to the outer surface of the sound-absorbing board into the slide groove, and finally the force of the spring makes the card block pass through the connecting groove, which is convenient for replacement, and the noise can be reduced through the sound-absorbing board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0019] Figure 2 It is a structural explosion diagram of a centrifugal fan assembly and an evaporator according to an embodiment of the present invention.

[0020] Figure 3 It is a cross-sectional schematic diagram of a centrifugal fan assembly and an evaporator according to an embodiment of the present invention.

[0021] Figure 4 The figure is a schematic structural diagram of a centrifugal fan assembly according to an embodiment of the present invention.

[0022] Figure 5 For an embodiment of the present invention Figure 4 A in the figure is an enlarged structural diagram.

[0023] In the figure: 1. display cabinet body; 11. cabinet door; 12. liner; 13. shelf base; 2. centrifugal fan assembly; 3. wind shield; 30. air guide grille; 31. front panel; 32. support plate; 311. first mounting screw; 321. second mounting screw; 4. evaporator; 5. centrifugal fan base; 51. air outlet; 6. centrifugal fan body; 61. fixing block; 7. centrifugal fan cover; 71. air inlet; 72. guide plate; 73. third mounting screw; 8. noise reduction assembly; 81. sound absorbing board; 82. slider; 83. square groove; 84. spring; 85. block; 86. connecting groove; 87. slide groove; 9. thermostat. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example: Figures 1 to 3 As shown, in one embodiment of the present application, a refrigerated display cabinet with a centrifugal fan includes a display cabinet body 1, a centrifugal fan assembly 2 and an evaporator 4. A accommodating cavity is formed in the display cabinet body 1, and a rotatably connected cabinet door 11 is provided in front of the display cabinet body. The cabinet door 11 overlaps and seals with the opening of the accommodating cavity. The cabinet door generally adopts a double-layer hollow glass door, which can effectively insulate, prevent heat exchange, and reduce energy consumption.

[0026] like Figures 1 to 5 As shown, the present application relates to a centrifugal fan assembly 2, the centrifugal fan assembly 2 and the evaporator 4 are both in the accommodating cavity, the centrifugal fan assembly 2 is installed on the upper part of the accommodating cavity, the centrifugal fan assembly includes a centrifugal fan base 5, a centrifugal fan body 6 and a centrifugal fan cover 7, the centrifugal fan cover is provided with an air inlet 71, the centrifugal fan base 5 is provided with an air outlet 51, the centrifugal fan cover 7 and the centrifugal fan base 5 are close to and form a ventilation duct, the centrifugal fan body 6 is between the centrifugal fan cover 7 and the centrifugal fan base, the The air inlet end of the centrifugal fan body 6 is connected to the air inlet 71, and the air outlet end of the centrifugal fan body 6 is connected to the air outlet 51. The air inlet 71 and the air outlet 51 are at an angle of 90 degrees. The centrifugal fan cover and the centrifugal fan base are close to and form a ventilation duct. The centrifugal fan body is located in the ventilation duct, and the air inlet and the air outlet are at an angle of 90 degrees. The centrifugal fan body adopts the spiral Archimedean vortex principle to suck in the low-pressure hot air mass in the upper space, and after compression and acceleration, the air mass is radially thrown onto the guide plate of the centrifugal fan cover, and then flows to the evaporator. Traditional evaporation fans are generally bearing fans and double-ball fans with an air inlet and outlet angle of 180 degrees. The fan noise is relatively high and is limited by the installation space. The air outlet space is generally small. When the air is discharged, it first blows to the top and back, and then rebounds to flow downward along the back. The change in wind direction increases the wind resistance and wind noise, which in turn increases the dB(A) of the entire machine. In this application, a centrifugal fan is used. The centrifugal fan has a 90-degree wind turn, which reduces the overall wind resistance and noise, and the economic cost is also lower than these evaporation fans.

[0027] like Figures 1 to 3 As shown, in one embodiment of the present application, the centrifugal fan base 5 is fixed on the evaporator 4, one side of the evaporator is below the air outlet 51, a wind shield 3 is provided below the centrifugal fan base, and a noise reduction component 8 is provided inside the centrifugal fan base 5. The centrifugal fan body squeezes and compresses the original low-pressure hot air mass by 90°, changes the wind direction, and throws it to the upper part of the evaporator, and then enters the bottom layer of the display cabinet after cooling to enter a new cycle, cooling the items in the cabinet.

[0028] like Figures 2 to 3As shown, in one embodiment of the present application, the windshield 3 includes a front panel 31 and a support plate 32. The front panel and the support inclined plate are both provided with a plurality of air guide grilles 30. The air guide grilles 30 are used to adjust and limit the flow rate of low-pressure hot air. The angle between the support plate 32 and the front panel 31 is 90-120 degrees. The inclined windshield can not only block the cold air flow in the cabinet, but also automatically guide the hot air flow with a slightly higher temperature to the top at a certain angle, forming a benign cooling cycle. Moreover, after the position of the centrifugal fan base is tilted and adjusted, the air outlet can flow to the evaporator more smoothly, reducing the reaction of the air flow impacting the back of the cabinet, and also reducing noise;

[0029] like Figures 2 to 3 As shown, in the present application, a thermostat 9 is provided on the front panel 31, and the thermostat 9 is electrically connected to the centrifugal fan body 6 and the evaporator 4. The thermostat can adjust the evaporator power and the centrifugal fan speed, and adjust and control the refrigeration effect of the entire display cabinet.

[0030] like Figures 2 to 4 As shown, in one embodiment of the present application, the centrifugal fan cover 7 is provided with a guide plate 72 at one end close to the air outlet 51, and the guide plate 72 guides the gas to the upper part of the evaporator 4, and the cross section of the guide plate 72 is 1 / 4 arc-shaped. An inner liner 12 is fixedly provided inside the display cabinet body 1, and a plurality of shelf seats 13 are provided on the inner liner 12. There are 9 shelf seats, and the height of the shelf can be freely adjusted to place various commodities such as canned beverages and bottled beverages in combination.

[0031] As shown Figure 3 As shown, in the present application, a first mounting screw 311 is provided on the front panel 31, and the end of the first mounting screw 311 is threadedly fixed to the top of the inner tank 12, and a second mounting screw 321 is threadedly provided on the support plate 32, and the end of the second mounting screw 321 is threadedly fixed to the evaporator 4.

[0032] like Figures 2 to 4 As shown, this embodiment relates to a centrifugal fan base 5, the evaporator 4 and the centrifugal fan base 5 are snap-fitted and fixed, a fixing block 61 is fixedly provided on the outer surface of the centrifugal fan body 6, the centrifugal fan cover 7 is snap-fitted with the centrifugal fan base 5, a third mounting screw 73 is threadedly inserted on the centrifugal fan base 5, and the end of the third mounting screw 73 is threadedly inserted on the centrifugal fan base 5; a noise reduction component 8 is connected inside the centrifugal fan base 5. Three fixing blocks 61 are provided, and the fixing blocks 61 are distributed in a circular array on the outer surface of the centrifugal fan body 6. The three fixing blocks 61 are spaced 120 degrees apart in sequence to fix the position of the centrifuge body.

[0033] like Figures 4 to 5As shown, the noise reduction component 8 includes a sound absorbing plate 81 and a slide groove 87 . The sound absorbing plate 81 is movably fitted with the inner surface of the centrifugal fan base 5 . The sound absorbing plate 81 and the centrifugal fan base 5 have the same shape.

[0034] The present application relates to a sound absorbing board 81, wherein a slider 82 is fixedly provided on the outer surface of the sound absorbing board 81, a square groove 83 is provided on one side of the slider 82, a spring 84 is fixedly provided on the inner surface of the square groove 83, a block 85 is fixedly provided on one side of the spring 84, a connecting groove 86 is provided on the inner surface of the centrifugal fan base 5, the block 85 movably penetrates the connecting groove 86, the slide groove 87 is provided on the inner surface of the centrifugal fan base 5, and the slider 82 is slidably fitted with the slide groove 87. The block is pressed into the square groove, and the slider connected to the outer surface of the sound absorbing board is slid into the slide groove, and finally the force of the spring causes the block to penetrate the connecting groove, which is convenient for replacement, and the sound absorbing board can reduce noise.

[0035] The working principle of the present invention is as follows: the inclined wind shield plate can block the cold air flow in the cabinet, and the inclination at a certain angle can automatically guide the hot air flow with a slightly higher temperature to the top, and after the position of the centrifugal fan base is adjusted, the air outlet can flow to the evaporator more smoothly, reducing the reaction of the air flow impacting the back of the cabinet, and also reducing the noise; forming a benign cooling cycle, the centrifugal fan cover and the centrifugal fan base are close to and form a ventilation duct, the centrifugal fan body is in the ventilation duct, and the air inlet and the air outlet are at an angle of 90 degrees. The centrifugal fan body adopts the spiral Archimedean vortex principle to inhale the low-pressure hot air mass in the upper space, and after compression and acceleration, the air mass is radially thrown onto the guide plate of the centrifugal fan cover, and then flows to the evaporator. After cooling, it enters the bottom layer of the display cabinet to enter a new cycle, cools the items in the cabinet, and the centrifugal fan body realizes a 90° wind direction change, with small wind resistance, and a sound absorbing board. The sound absorbing board is connected to the inside of the centrifugal fan base for easy replacement, and the noise can be reduced by the sound absorbing board.

[0036] The technical features of the above-described embodiments may be arbitrarily combined, and the execution order of the method steps is not limited. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A refrigerated display cabinet with a centrifugal fan, comprising a display cabinet body (1), a centrifugal fan assembly and an evaporator (4), wherein a receiving cavity is formed in the display cabinet body (1), and a rotatably connected cabinet door (11) is provided in front of the display cabinet body, wherein the cabinet door (11) overlaps and seals with an opening of the receiving cavity, and wherein: The centrifugal fan assembly and the evaporator (4) are both located in the accommodating cavity. The centrifugal fan assembly is mounted on the upper part of the accommodating cavity. The centrifugal fan assembly comprises a centrifugal fan base (5), a centrifugal fan body (6) and a centrifugal fan cover (7). The centrifugal fan cover (7) is provided with an air inlet (71). The centrifugal fan base (5) is provided with an air outlet (51). The centrifugal fan cover (7) and the centrifugal fan base (5) are in contact with each other and form a ventilation duct. The centrifugal fan body (6) is located between the centrifugal fan cover (7) and the centrifugal fan base (5). The air inlet end of the centrifugal fan body (6) is The centrifugal fan body (6) is connected to the air inlet (71), the air outlet end of the centrifugal fan body (6) is connected to the air outlet (51), the air inlet (71) and the air outlet (51) form an angle of 90 degrees, the centrifugal fan base (5) is fixed on the evaporator (4), one side of the evaporator (4) is below the air outlet (51), a windshield (3) is provided below the centrifugal fan base (5), a noise reduction component (8) is provided inside the centrifugal fan base (5), the noise reduction component (8) comprises a sound absorbing plate (81) and a slide groove (87), and the sound absorbing plate (81) is movably fitted with the inner surface of the centrifugal fan base (5); The wind shield (3) comprises a front panel (31) and a support plate (32), the front panel (31) and the support plate (32) are both provided with a plurality of air guide grilles, the included angle between the support plate (32) and the front panel (31) is greater than 90 degrees and less than 120 degrees, so that the support plate (32) is arranged to be inclined, and the air outlet (51) is inclined downward; A guide plate (72) is provided at one end of the centrifugal fan cover (7) close to the gas outlet (51), and the guide plate (72) guides the gas to the upper part of the evaporator (4); The guide plate (72) has a cross-section in the shape of a quarter arc.

2. A refrigerated display cabinet with a centrifugal fan as claimed in claim 1, characterized in that: A temperature controller (9) is provided on the front panel (31), and the temperature controller (9) is electrically connected to the centrifugal fan body (6) and the evaporator (4).

3. A refrigerated display cabinet with a centrifugal fan as claimed in claim 2, characterized in that: An inner liner (12) is fixedly provided inside a display cabinet body (1), a plurality of shelf seats (13) are provided on the inner liner (12), a first mounting screw (311) is provided on the front panel (31), an end of the first mounting screw (311) is threadedly fixed to the top of the inner liner (12), a second mounting screw (321) is threadedly provided on the support plate (32), and an end of the second mounting screw (321) is threadedly fixed to the evaporator (4).

4. A refrigerated display cabinet with a centrifugal fan as claimed in claim 1, characterized in that: The evaporator (4) and the centrifugal fan base (5) are fixedly connected, a fixing block (61) is fixedly provided on the outer surface of the centrifugal fan body (6), the centrifugal fan cover (7) is snap-fitted with the centrifugal fan base (5), a third mounting screw (73) is threadedly inserted on the centrifugal fan base (5), and the end of the third mounting screw (73) is threadedly inserted on the centrifugal fan base (5); and a noise reduction component (8) is connected inside the centrifugal fan base (5).

5. A refrigerated display cabinet with a centrifugal fan as claimed in claim 4, characterized in that: A slider (82) is fixedly provided on the outer surface of the sound absorbing plate (81), a square groove (83) is provided on one side of the slider (82), a spring (84) is fixedly provided on the inner surface of the square groove (83), a clamping block (85) is fixedly provided on one side of the spring (84), a connecting groove (86) is provided on the inner surface of the centrifugal fan base (5), the clamping block (85) movably penetrates the connecting groove (86), the sliding groove (87) is provided on the inner surface of the centrifugal fan base (5), and the slider (82) and the sliding groove (87) are slidably fitted.

6. A refrigerated display cabinet with a centrifugal fan as claimed in claim 5, characterized in that: The sound absorbing plate (81) has the same shape as the centrifugal fan base (5).

7. A refrigerated display cabinet with a centrifugal fan as claimed in claim 6, characterized in that: Three fixing blocks (61) are provided, and the fixing blocks (61) are distributed in a circular array on the outer surface of the centrifugal fan body (6).

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