Air pressure balance valve for display cabinet

Abstract

The air pressure balance valve is installed on a foaming layer of a box body of the display cabinet in an embedded mode and comprises an air outlet guide pipe, a check valve element and an air inlet connecting pipe, one end of the air outlet guide pipe is installed in the box body of the display cabinet, a rotating handle is arranged at one end of the air inlet connecting pipe, and an anti-disengaging protrusion is arranged at the other end of the air inlet connecting pipe. The check valve element is made of silica gel, one end of the check valve element is a flat air outlet, the other end of the check valve element is a funnel-shaped air inlet, the end, away from the flat air outlet, of the funnel-shaped air inlet is installed on the air inlet connecting pipe through an anti-falling protrusion, and the air inlet connecting pipe provided with the check valve element is detachably connected with the air outlet guide pipe. The utility model is directly embedded in the box body, and the check valve core adopts a silica gel check valve core, so that the problems of difficult door opening, air permeability and frosting and sound during door opening caused by large temperature difference in the cabinet are solved, the structure is simple, the manufacture and the installation are convenient, and the practicability is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment accessories, in particular to a pneumatic balance valve for a display cabinet. Background Art

[0002] During the use of a display cabinet, in order to reduce the temperature of related foods such as beverages in the cabinet, the temperature in the cabinet will be very low, resulting in a negative pressure in the cabinet. In this case, the pressure difference between the inside and outside of the cabinet will be very large, and the door body will be sucked onto the cabinet body under the influence of the negative pressure, making it difficult for the user to open the door. Currently, there are three common solutions. The first is to use an assist handle, which can be opened with very little force, but the disadvantages are high price and poor versatility. The second is to use a common gravity table tennis ball-style pressure balance valve, which has disadvantages such as large volume, being exposed outside the cabinet body, not being beautiful, being prone to failure when squeezed, and making a "bang bang" sound during use due to the movement of the internal sphere. The third is to open a small ventilation hole, which has the disadvantage of cold leakage and is prone to frosting inside the cabinet. Summary of the Utility Model

[0003] In order to overcome the above problems existing in the prior art, the utility model provides a pneumatic balance valve for a display cabinet.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a pneumatic balance valve for a display cabinet, which is embedded in the foaming layer of the display cabinet body, including an air outlet conduit, a check valve core, and an air inlet connecting pipe. One end of the air outlet conduit is installed inside the display cabinet body. One end of the air inlet connecting pipe is provided with a rotating handle, and the other end is provided with an anti-detachment protrusion. The check valve core is made of silica gel. One end of the check valve core is a flat air outlet, and the other end is a funnel-shaped air inlet. The end of the funnel-shaped air inlet away from the flat air outlet is installed on the air inlet connecting pipe through the anti-detachment protrusion. The air inlet connecting pipe installed with the check valve core is detachably connected to the air outlet conduit.

[0005] For the above-mentioned pneumatic balance valve for a display cabinet, the end of the air outlet conduit away from the check valve core is provided with a honeycomb-shaped air outlet.

[0006] For the above-mentioned pneumatic balance valve for a display cabinet, a sealing gasket is provided between the air outlet conduit and the air inlet connecting pipe, and the sealing gasket is a silica gel sealing gasket.

[0007] For the above-mentioned pneumatic balance valve for a display cabinet, the rotating handle is of a plum blossom-shaped structure.

[0008] For the above-mentioned pneumatic balance valve for a display cabinet, the air inlet connecting pipe at the end provided with the rotating handle is provided with a grid air inlet.

[0009] For the above-mentioned pneumatic balance valve for a display cabinet, the air inlet connecting pipe is threadedly connected to the air outlet conduit.

[0010] For the above-mentioned air pressure balance valve for a display cabinet, a limiting structure and a clamping protrusion are provided at one end of the air outlet conduit away from the check valve core. The clamping protrusion is clamped in the groove of the display cabinet body, and the limiting structure is located on the air outlet conduit corresponding to the side of the clamping protrusion away from the check valve core.

[0011] The beneficial effect of the present utility model is that the present utility model is directly embedded inside the cabinet body, and the check valve core adopts a silicone check valve core, which solves the problems of difficult door opening, air leakage and frosting, and noisy door opening caused by large temperature difference inside the cabinet. The structure is simple, convenient for manufacturing and installation, and has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0013] Figure 1 Schematic diagram of the present utility model;

[0014] Figure 2 Exploded view of the present utility model;

[0015] Figure 3 Installation schematic diagram of the present utility model;

[0016] Figure 4 Installation cross-sectional view of the present utility model;

[0017] Figure 5 Schematic diagram of the air outlet of the air outlet conduit of the present utility model;

[0018] Figure 6 Schematic diagram of the air intake pipe of the present utility model;

[0019] Figure 7 Schematic diagram of the groove of the display cabinet body of the present utility model.

[0020] In the figure, 1. Display cabinet body, 2. Air pressure balance valve, 3. Silicone gasket, 4. Air intake pipe, 4-1. Rotating handle, 4-2. Grille air inlet, 4-3. Anti-disengagement protrusion, 5. Check valve core, 5-1. Flat air outlet, 5-2. Funnel-shaped air inlet, 6. Air outlet conduit, 6-1. Limiting structure, 6-2. Clamping protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be described in detail below in conjunction with the drawings and specific embodiments.

[0022] As Figure 1-4As shown in the figure, this embodiment discloses a pneumatic balance valve for a display cabinet, which is embedded in the foaming layer of the display cabinet box body 1. The pneumatic balance valve 2 includes an air outlet conduit 6, a check valve core 5, a silicone gasket 3, and an air inlet connection pipe 4. A silicone gasket is provided between the air outlet conduit and the air inlet connection pipe. One end of the air outlet conduit 6 is installed inside the display cabinet box body 1. One end of the air inlet connection pipe 4 is provided with a rotating handle 4-1, and the rotating handle has a plum blossom-shaped structure; the other end is provided with an anti-disengagement protrusion 4-3.

[0023] The check valve core is made of silicone. One end of the check valve core 5 is a normally closed flat air outlet 5-1, and the other end is a funnel-shaped air inlet 5-2. The flat air outlet has the characteristics of opening unidirectionally and closing reversely, which can effectively play the role of unidirectional air flow and reverse cut-off. The end of the funnel-shaped air inlet 5-2 far from the flat air outlet 5-1 is installed on the air inlet connection pipe through the anti-disengagement protrusion. The air inlet connection pipe with the check valve core installed is detachably connected to the air outlet conduit by threads.

[0024] As Figure 5 shown, the end of the air outlet conduit far from the check valve core is provided with a honeycomb-shaped air outlet, which can not only increase the air volume, but also prevent foreign objects such as screws from entering the valve core, playing a good protective role. The end of the air outlet conduit 6 far from the check valve core is provided with a limit structure 6-1 and a clamping protrusion 6-2. The clamping protrusion 6-2 is a block evenly distributed at the honeycomb-shaped air outlet end of the air outlet conduit 6. In this embodiment, 4 blocks are provided. A groove as Figure 7 shown is opened on the inner plate of the foaming layer of the display cabinet box body. The blocks of the clamping protrusion 6-2 are clamped in the groove of the display cabinet box body. The limit structure 6-1 is located on the air outlet conduit corresponding to the side of the clamping protrusion far from the check valve core to prevent the air outlet conduit from being pulled out of the box body.

[0025] As Figure 6 shown, the air inlet connection pipe provided with the rotating handle is provided with a grid air inlet 4-2. The plum blossom-shaped structure of the rotating handle can be conveniently tightened by hand. The grid air inlet can prevent fingers or other foreign objects from being inserted into it. The anti-disengagement structure 4-3 can firmly sleeve the check valve core 5 on it to prevent it from falling off.

[0026] During the use process, when the refrigeration system of the display cabinet starts to refrigerate, the pressure inside the cabinet will gradually decrease. At this time, the check valve core 5 in the pneumatic balance valve is affected by the negative pressure inside the box, and the flat air outlet 5-1 will open. The gas outside the box body will pass through the air inlet of the air inlet connection pipe 4, pass through the check valve core 5, and then enter the box through the air outlet conduit 6. After the air pressure inside and outside the box is balanced, the flat air outlet 5-1 will return to its flat initial state, and the ventilation inside and outside the box body will be closed. When opening the door again, the door can be easily opened.

[0027] The above embodiments are only exemplary embodiments of the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various modifications or equivalent replacements to the present utility model within the essence and protection scope of the present utility model, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present utility model.

Claims

1. A pressure balancing valve for a display cabinet, characterized in that: Embedded and installed in the foam layer of the display cabinet body, it includes an air outlet duct, a check valve core, and an air inlet pipe. One end of the air outlet duct is installed in the display cabinet body, one end of the air inlet pipe is provided with a rotating handle, and the other end is provided with an anti-detachment protrusion. The check valve core is made of silicone. One end of the check valve core is a flat air outlet, and the other end is a funnel-shaped air inlet. The end of the funnel-shaped air inlet away from the flat air outlet is installed on the air inlet pipe through an anti-detachment protrusion, and the air inlet pipe equipped with the check valve core is detachably connected to the air outlet duct.

2. The air pressure balancing valve for a display cabinet according to claim 1, characterized in that: The air outlet conduit is provided with a honeycomb-shaped air outlet at one end away from the check valve core.

3. The air pressure balancing valve for a display cabinet according to claim 1, characterized in that: A sealing gasket is arranged between the air outlet conduit and the air inlet pipe, and the sealing gasket is a silicone sealing gasket.

4. The air pressure balancing valve for a display cabinet according to claim 1, characterized in that: The rotating handle is a plum blossom-shaped structure.

5. The air pressure balancing valve for a display cabinet according to claim 1, characterized in that: The air intake pipe at one end of the rotating handle is provided with a grille air intake.

6. The air pressure balancing valve for a display cabinet according to claim 1, characterized in that: The air inlet pipe is threadedly connected with the air outlet pipe.

7. The air pressure balancing valve for a display cabinet according to claim 1, characterized in that: A limiting structure and a clamping protrusion are arranged at one end of the air outlet conduit away from the check valve core. The clamping protrusion is clamped in the groove of the display cabinet body. The limiting structure is located on the air outlet conduit corresponding to the side of the clamping protrusion away from the check valve core.

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