Liquid seal drain pipe with air pressure balance function and display cabinet

Abstract

The liquid seal drain pipe with the air pressure balance function comprises a water inlet pipe, a water outlet pipe and an air inlet pipe, one end of the water inlet pipe is communicated with a water guide pipe arranged in a box body of the display cabinet, the other end of the water inlet pipe is provided with a liquid collecting structure in a closed mode, and the water outlet pipe is located on the side, corresponding to the water inlet pipe, of the upper portion of the liquid collecting structure. An air inlet pipe is arranged on the upper portion of the water inlet pipe on the side opposite to the water outlet pipe, a mounting pipe is arranged at the end, away from the water inlet pipe, in the air inlet pipe, the pipe diameter of the mounting pipe is larger than that of the air inlet pipe, and a pressure adjusting structure is arranged in the mounting pipe. And the pressure adjusting structure is mounted in the mounting pipe through a pipe sleeve. The air pressure balance function is added to the drainage pipe, air is isolated through condensate water while the condensate water is drained, leakage of cold air is reduced, energy consumption is reduced, and the problem that the door is difficult to open due to the pressure difference inside and outside the box is solved.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration equipment accessories, in particular to a liquid-sealed drain pipe and a display cabinet with an air pressure balancing function. Background Art

[0002] Due to refrigeration inside the display cabinet product box, water vapor is cooled and liquefied into water droplets, which need to be discharged from the inside of the box to the water collection box at the bottom. The current drainage method is relatively direct, using a drain pipe to drain it. Because the drain pipe is directly connected to the inside and outside of the box, it will cause cold air leakage, resulting in increased power consumption and increased operating costs for end users. If the box is completely sealed and has good insulation effect, opening the door to take things will cause a pressure difference between the inside and outside of the box, making it difficult to open the door. Summary of the invention

[0003] In order to overcome the above problems existing in the prior art, the present invention provides a liquid-sealed drain pipe and a display cabinet with an air pressure balancing function.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a liquid-sealed drainage pipe with an air pressure balancing function, comprising a water inlet pipe, a water outlet pipe, and an air inlet pipe, one end of the water inlet pipe is connected to a water guide pipe built into a display cabinet body, and the other end is sealed with a liquid collecting structure, the water outlet pipe is located on a side of the water inlet pipe corresponding to the upper part of the liquid collecting structure, the lowest point of the outlet of the water outlet pipe is higher than the highest point of the inlet of the water outlet pipe, an air inlet pipe is arranged on the upper part of the water inlet pipe on the opposite side of the water outlet pipe, an installation pipe is arranged in the air inlet pipe away from one end of the water inlet pipe, the diameter of the installation pipe is larger than the diameter of the air inlet pipe, a pressure regulating structure is arranged in the installation pipe, and the pressure regulating structure is installed in the installation pipe through a pipe sleeve.

[0005] The above-mentioned liquid-sealed drainage pipe with air pressure balancing function, the pipe sleeve includes a small diameter end and a large diameter end, the small diameter end is connected to the inner wall of the installation pipe, and the diameter of the large diameter end is smaller than the diameter of the installation pipe.

[0006] The above-mentioned liquid-sealed drain pipe with air pressure balancing function, the pressure regulating structure includes a check valve, a spring, and a sealing ring. The check valve includes a check valve needle and a top head. One side of the top head rests on the pipe sleeve, and the other side is fixedly provided with a check valve needle. The spring is sleeved on the check valve needle. A check valve seat matching the check valve needle is provided at the connection between the mounting pipe and the air inlet pipe.

[0007] The above-mentioned liquid-sealed drainage pipe with air pressure balancing function, the top head includes a plug body and a plug seat, the size of the plug seat is adapted to the inner diameter size of the large diameter end of the pipe sleeve, the plug body is installed on one side of the plug seat, and the size of the plug body close to the plug seat is adapted to the inner diameter size of the small diameter end of the pipe sleeve.

[0008] In the above-mentioned liquid-sealed drain pipe with air pressure balancing function, the plug body is a conical or truncated cone structure.

[0009] In the above-mentioned liquid-sealed drainage pipe with air pressure balancing function, a sealing ring is arranged at the position where the pipe sleeve contacts the plug body.

[0010] The above-mentioned liquid-sealed drainage pipe with air pressure balancing function, the water inlet pipe, the water outlet pipe, the air inlet pipe and the installation pipe are integrally formed.

[0011] A display cabinet comprises a cabinet body and a cabinet door, wherein the cabinet door is installed at the front side of the cabinet body, a water pipe is preset inside the cabinet body, the above-mentioned liquid-sealed drain pipe with air pressure balancing function is connected to the water pipe, and the liquid-sealed drain pipe is installed in a compressor room at the bottom of the cabinet body.

[0012] The beneficial effect of the present invention is that the present invention adds an air pressure balance function to the drain pipe, and while discharging condensed water, uses the condensed water to isolate the air, which reduces the leakage of cold air and reduces energy consumption compared to existing drain pipes. By adding the air pressure balance function, the door opening pull can be reduced compared to existing display cabinets, solving the problem of difficulty in opening the door caused by the pressure difference between the inside and outside of the box. The drain pipe with an air pressure balance function of the present invention is simple to install, low in cost, and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the present invention; Fig. 2 is a cross-sectional view of the present invention; FIG3 is a schematic diagram of a mounting tube according to the present invention; FIG4 is a schematic diagram of a plug according to the present invention; FIG. 5 is a schematic diagram of the installation of the present invention. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] like Figure 1-3, the present embodiment discloses a liquid-sealed drainage pipe with an air pressure balancing function, comprising an inlet pipe 1, an outlet pipe 2, and an air inlet pipe 6. One end of the inlet pipe 1 is connected to the water guide pipe built into the display cabinet body, and the other end is sealed with a liquid collecting structure 3. The outlet pipe 2 is located on the side of the water inlet pipe corresponding to the upper part of the liquid collecting structure. The outlet pipe is inclined upward, and the lowest point of the outlet of the outlet pipe is higher than the highest point of the inlet of the outlet pipe, so that condensed water plays a role of liquid sealing in the drainage pipe and the outlet pipe. An air inlet pipe 6 is arranged on the upper part of the water inlet pipe on the opposite side of the outlet pipe, and an installation pipe 5 is arranged in the air inlet pipe away from one end of the water inlet pipe. The diameter of the installation pipe is larger than the diameter of the air inlet pipe. A pressure regulating structure is arranged in the installation pipe, and the pressure regulating structure is installed in the installation pipe through a pipe sleeve 4. The pipe sleeve 4 is divided into a large-diameter end and a small-diameter end. The large-diameter end is threadedly connected to the inner wall of the installation pipe or fixedly connected by an adhesive, and the diameter of the small-diameter end is smaller than the diameter of the installation pipe. During production, the water inlet pipe 1, the water outlet pipe 2, the air inlet pipe 6 and the installation pipe 5 can be integrally formed.

[0016] The pressure regulating structure includes a check valve 7, a spring 8, and a sealing ring. As shown in FIG4, the check valve includes a check valve needle 7-1 and a top head. The top head includes a plug body 7-3 and a plug seat 7-2. One end of the plug body 7-3 is fixed on the plug seat 7-2. The plug body 7-3 abuts against the pipe sleeve. The plug seat 7-2 is fixed with a check valve needle. The spring 8 is sleeved on the check valve needle. A check valve seat 9 adapted to the check valve needle is provided at the connection between the mounting pipe and the air inlet pipe (as shown in FIG3). In the normal state, the spring is in a slightly compressed state, pressing the top head tightly so that the plug body of the top head is inserted into the small-diameter end of the pipe sleeve, which plays a sealing role.

[0017] In this embodiment, the size of the plug seat 7-2 is adapted to the inner diameter of the large diameter end of the pipe sleeve 4, and the size of the plug body near the plug seat is adapted to the inner diameter of the small diameter end of the pipe sleeve. The plug body is a conical or truncated cone structure.

[0018] In this embodiment, in order to ensure the sealing effect and reduce cold leakage, a sealing ring is provided at the position where the sleeve contacts the plug body.

[0019] When the liquid-sealed drain pipe with an air pressure balancing function of this embodiment is used, the liquid-sealed drain pipe is installed at the bottom of the display cabinet body, and the liquid-sealed drain pipe is connected to the outside of the box. When condensed water is generated inside the box, it can be continuously discharged outside the box through the liquid-sealed drain pipe. Due to the liquid collecting structure at the bottom of the drain pipe and the water outlet pipe is arranged to be inclined upward, the lowest point of the outlet of the water outlet pipe is higher than the highest point of the inlet of the water outlet pipe. Part of the condensed water will be retained in the drain pipe to form a liquid seal, and the condensed water is used to isolate the cold air leakage in the box. The drain pipe is provided with an air pressure balancing device in the middle, which pushes the check valve to operate under the action of atmospheric pressure. When the air pressure inside and outside the box is balanced, the head is restored under the reaction force of the spring, and the air inside and outside the box is re-isolated, thereby achieving the triple purposes of drainage, energy consumption control, and convenient door opening.

[0020] The liquid-sealed drain pipe with air pressure balancing function in this embodiment uses a display cabinet as a carrier, as shown in Figure 5. The display cabinet includes a box body and a cabinet door. The cabinet door is installed on the front side of the box body. A water pipe is preset inside the box body. The liquid-sealed drain pipe is connected to the water pipe. The liquid-sealed drain pipe is installed in the compressor room at the bottom of the box body.

[0021] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A liquid-sealed drain pipe with air pressure balancing function, characterized in that: It includes a water inlet pipe, a water outlet pipe and an air inlet pipe. One end of the water inlet pipe is connected to the water guide pipe built into the display cabinet body, and the other end is sealed with a liquid collecting structure. The water outlet pipe is located on a side of the water inlet pipe corresponding to the upper part of the liquid collecting structure. The lowest point of the outlet of the water outlet pipe is higher than the highest point of the inlet of the water outlet pipe. An air inlet pipe is arranged on the upper part of the water inlet pipe opposite to the water outlet pipe. An installation pipe is arranged in the air inlet pipe away from one end of the water inlet pipe. The diameter of the installation pipe is larger than the diameter of the air inlet pipe. A pressure regulating structure is arranged in the installation pipe, and the pressure regulating structure is installed in the installation pipe through a pipe sleeve.

2. The liquid-sealed drain pipe with air pressure balancing function according to claim 1, characterized in that: The pipe sleeve comprises a small diameter end and a large diameter end, the small diameter end is connected to the inner wall of the installation pipe, and the diameter of the large diameter end is smaller than the diameter of the installation pipe.

3. The liquid-sealed drain pipe with air pressure balancing function according to claim 2, characterized in that: The pressure regulating structure includes a check valve, a spring, and a sealing ring. The check valve includes a check valve needle and a top head. One side of the top head abuts against the pipe sleeve, and the other side is fixedly provided with a check valve needle. The spring sleeve is arranged on the check valve needle. A check valve seat adapted to the check valve needle is arranged at the connection between the mounting pipe and the intake pipe.

4. The liquid-sealed drain pipe with air pressure balancing function according to claim 3, characterized in that: The plug head includes a plug body and a plug seat. The size of the plug seat is adapted to the inner diameter size of the large diameter end of the pipe sleeve. The plug body is installed on one side of the plug seat. The size of the plug body near the plug seat is adapted to the inner diameter size of the small diameter end of the pipe sleeve.

5. The liquid-sealed drain pipe with air pressure balancing function according to claim 4, characterized in that: The plug body is a conical or truncated cone structure.

6. The liquid-sealed drain pipe with air pressure balancing function according to claim 4, characterized in that: A sealing ring is arranged at the position where the sleeve contacts the plug body.

7. The liquid-sealed drain pipe with air pressure balancing function according to claim 1, characterized in that: The water inlet pipe, the water outlet pipe, the air inlet pipe and the installation pipe are integrally formed.

8. A display cabinet, comprising a cabinet body and a cabinet door, wherein the cabinet door is installed on the front side of the cabinet body, characterized in that: A water pipe is preset inside the box body, and a liquid-sealed drain pipe with an air pressure balancing function described in any one of claims 1 to 7 is connected to the water pipe, and the liquid-sealed drain pipe is installed in the compressor room at the bottom of the box body.

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