Water drainer

Abstract

The utility model provides a drainer. The drainer comprises a water inlet and a water outlet, comprising a shell which is provided with a water inlet cavity, a pressure cavity and a first channel; the sealing element is movably arranged in the pressure cavity, and an inclined angle is formed between the moving direction of the sealing element and the axis of the first channel; the pressure relief mechanism is used for controlling the pressure state of the pressure cavity; when the pressure cavity is in the first state, the pressure in the pressure cavity is larger than that of the water inlet cavity and drives the sealing piece to block the first channel, and when the second pressure cavity is in the second state and the pressure of the pressure cavity is smaller than that of the water inlet cavity, liquid in the water inlet cavity jacks up the sealing piece, so that the water inlet cavity is communicated with the first channel. And liquid in the water inlet cavity is discharged to the water outlet through the first channel. The utility model has the beneficial effects that the pressure cavity is adjusted through the pressure relief mechanism, so that the pressure in the pressure cavity is greater than or less than the pressure of the water inlet cavity, and the sealing element moves through the pressure difference, so as to open or close the drainage.

Description

TECHNICAL FIELD

[0001] The utility model relates to a water drainer technical field especially relates to a water drainer. BACKGROUND

[0002] The working principle of the automatic water drainer on the market is to rely on pneumatic type or float ball type or timing control discharge, and this mode basically all communicates and pressure release through directly connecting the water inlet cavity with the outside, resulting in excessive loss of air pressure in the water inlet cavity; resulting in waste of compressed air. SUMMARY

[0003] The utility model provides a water drainer to solve the technical problem in above -mentioned background art.

[0004] The utility model provides a water drainer, including, the shell has water inlet cavity, pressure chamber, first channel, water inlet and drain, the water inlet with water inlet cavity intercommunication,;Sealing element, sealing element sets up in pressure chamber, pressure release mechanism, pressure release mechanism is used for controlling the pressure state of pressure chamber, the pressure chamber is in first state, and the pressure in pressure chamber is greater than or equal to the pressure of water inlet cavity, and the sealing element blocks first channel, makes water inlet cavity unable with first channel intercommunication, second pressure chamber is in second state, and the pressure of pressure chamber is less than the pressure of water inlet cavity or less than the sum of the pressure of water inlet cavity and first channel, and the liquid of water inlet cavity lifts sealing element, makes water inlet cavity with first channel intercommunication, and the liquid of water inlet cavity is discharged to drain through first channel.

[0005] Further, the shell is further provided with a pressure relief channel and at least one pressure supplement channel, one end of the pressure supplement channel is communicated with the water inlet cavity, and the other end is communicated with the pressure chamber, the pressure release mechanism is used for opening or blocking the pressure relief channel, in the first state, the pressure release mechanism blocks the pressure relief channel, the pressure of the water inlet cavity flows to the pressure chamber through the pressure supplement channel, in the second state, the pressure release mechanism opens the pressure relief channel, the pressure of the pressure chamber is discharged through the pressure supplement channel and the pressure relief channel, so that the pressure of the pressure chamber is less than the pressure of the water inlet cavity, and then the sealing element is opened to drain water.

[0006] Further, the total air passage cross section of the pressure supplement channel is greater than the total air passage cross section of the pressure relief channel.

[0007] Further, the exhaust end of the pressure relief channel is communicated with the first channel.

[0008] Further, the pressure relief mechanism comprises a floating ball assembly, a blocking piece and a fixing piece; one end of the fixing piece is fixed in the shell, and the other end extends towards the water inlet cavity; the floating ball assembly has a fixed end, which is hingedly connected with the blocking piece and the fixing piece respectively, and the hingedly connected ends of the blocking piece and the fixing piece are arranged in a staggered manner; when the floating ball assembly moves upward, the blocking piece moves downward, thereby opening the pressure relief channel.

[0009] Further, the floating ball assembly comprises a horizontal plate, an inclined plate, a floating ball and two vertical plates, the two vertical plates are vertically arranged on both sides of the upper end surface of the horizontal plate, and the inclined plate is arranged on the bottom surface or the side wall of the horizontal plate; the horizontal plate, the vertical plates and the inclined plate form the fixed end, the blocking piece and the fixing piece are hingedly connected with the two vertical plates through hinged rods respectively; the floating ball is connected with the inclined plate.

[0010] Further, the pressure relief pipe group is arranged in the mounting groove, and the pressure relief pipe group comprises a first state when not pressed and a second state when pressed; when the pressure relief pipe group is in the first state, the pressure cavity is not communicated with the pressure relief channel, and when the pressure relief pipe group is in the second state, the pressure cavity is communicated with the pressure relief channel.

[0011] Further, the pressure relief pipe group comprises a pressure relief pipe, a pressing rod, a sealing ring and a reset piece, the pressure relief pipe is provided with a first air passage along an axis and a second air passage penetrating in the radial direction of the pressure relief pipe, the second air passage is communicated with the first air passage and the pressure relief channel; the pressing rod is arranged in the first passage in a penetrating manner, the pressing rod comprises a sealing end and a pressing end, the sealing ring is mounted on the sealing end, and the reset piece is mounted on the pressing end; the sealing end is located in the pressure cavity, and the pressing end is located outside the pressure cavity; the diameter of the pressing rod is smaller than the diameter of the first passage.

[0012] Further, the top of the shell is provided with a pressure relief mounting hole for mounting a pressure relief valve.

[0013] Further, the top of the shell is provided with a gas return hole for mounting a gas return pipeline.

[0014] The beneficial effects of the utility model are as follows: the pressure relief mechanism is used for adjusting the pressure cavity, so that the pressure in the pressure cavity is greater than or less than the pressure in the water inlet cavity, the sealing piece moves through the pressure difference, and then the drainage is opened or closed. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the following embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0016] Figure 1 is a structural schematic diagram of the present application.

[0017] Figure 2 is a top view schematic diagram of the present application.

[0018] Figure 3 is a sectional view schematic diagram of the internal pressure relief passage of the present application.

[0019] Figure 4 is a sectional view schematic diagram of the internal pressure compensation passage of the present application.

[0020] Figure 5 is Figure 3 the local enlarged view of A of the present application.

[0021] Figure 6 is a pressure relief state schematic diagram of the pressure relief pipe group.

[0022] Figure 7 is Figure 3 the local enlarged view of B of the present application.

[0023] Figure 8 is a structural schematic diagram of the pressure relief mechanism.

[0024] Figure 9 is a structural schematic diagram of the sealing member.

[0025] Figure 10 is a position diagram of the air inlet of the pressure relief passage and the pressure compensation passage.

[0026] 1, shell; 11, water inlet; 12, drain port; 13, pressure relief mounting hole; 14, back air hole; 15, water inlet cavity; 151, filter space; 152, drain space; 16, pressure relief passage; 17, pressure compensation passage; 18, first passage; 19, perspective window; 2, pressure relief mechanism; 21, floating ball assembly; 211, horizontal plate; 212, vertical plate; 213, inclined plate; 214, floating ball; 22, fixing member; 23, plugging member; 3, filter screen; 4, pressure relief pipe group; 41, pressure relief pipe; 42, pressing rod; 43, reset member; 44, sealing ring; 5, sealing member; 51, fixed side edge; 52, movable part; 53, pressure cavity. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, in order to facilitate description, only the parts related to the present application are shown in the drawings, rather than all the structures. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0028] Reference to "an embodiment" in this text means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a particular alternative embodiment or set of embodiments. It will be explicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] As shown in Figures 1-10 The present embodiment discloses a water drainer, which comprises a shell 1, the shell 1 is provided with a water inlet cavity 15, a pressure cavity 53, a first channel 18, a water inlet 11 and a water outlet 12. The water inlet 11 is communicated with the water inlet cavity 15, which is used for draining the condensed water into the water inlet cavity 15. In the present embodiment, the water inlet 11 is two, which can be used in different height environments. The two water inlets 11 are arranged on the shell 1. The water outlet 12 is communicated with the first channel 18, which is used for discharging the pressure of the pressure cavity 53 and the condensed water in the water inlet cavity 15.

[0030] The sealing member 5 is movably arranged in the pressure cavity 53, and the moving direction of the sealing member 5 forms an inclined angle with the axis of the first channel. Specifically, the pressure cavity 53 is arranged non-coaxially with the axis of the first channel. In this embodiment, the moving direction of the sealing member 5 is arranged perpendicularly to the axis of the first channel 18. In other embodiments, the moving direction of the sealing member 5 can also form an angle of 45° or 60° with the axis of the first channel 18. Preferably, one end of the first channel 18 is in communication with the water inlet cavity 15, and the other end is in communication with the drain outlet 12. The end of the first channel 18 in communication with the water inlet cavity 15 is a communication section, and the communication section forms an inclined angle with the axis of the first channel 18. Specifically, the communication section is arranged at an angle of 90° with the axis of the first channel 18. In other embodiments, the communication section can be arranged at an angle of 45° or 60° with the axis of the first channel 18, so that the upper end of the communication section is flush, and the communication section forms a step. The sealing member 5 is arranged on the upper end surface of the communication section, and is used to block the water outlet section of the water inlet cavity 15 and the first channel 18. When the pressure cavity 53 is in the first state, the pressure in the pressure cavity 53 is greater than the pressure in the water inlet cavity 15, and the pressure in the pressure cavity 53 drives the sealing member 5 to block the first channel 18. When the second pressure cavity 53 is in the second state, the pressure in the pressure cavity 53 is less than the pressure in the water inlet cavity 15 or less than the sum of the pressures in the first channel 18 and the water inlet cavity 15, and the liquid in the water inlet cavity 15 lifts the sealing member 5, so that the water outlet section of the water inlet cavity 15 is in communication with the first channel 18, and the liquid in the water inlet cavity 15 is discharged to the drain outlet 12 through the first channel 18. Specifically, the sealing ring 44 is used to block the water inlet 11 of the communication section, so that the water outlet section of the water inlet cavity 15 is disconnected. Specifically, a pressure relief mechanism is used to control the pressure state of the pressure cavity 53, so that the pressure cavity 53 can be in the first state or the second state.

[0031] In order to keep the pressure in the pressure cavity 53 replenished in time, the shell 1 further comprises a pressure relief channel 16 and at least one pressure supplementing channel 17. One end of the pressure supplementing channel 17 is in communication with the water inlet cavity 15, and the other end is in communication with the pressure cavity 53. The pressure supplementing channel 17 is in a constant communication state, and constantly replenishes the pressure in the pressure cavity 53 from the water inlet cavity 15, so that the pressure in the pressure cavity 53 is greater than the pressure in the water inlet cavity 15. The sealing member 5 is driven downward by the pressure, blocks the communication section, and disconnects the water inlet cavity 15 and the first channel 18. In other embodiments, the pressure cavity can also be pressurized by a pressurizing pump. Specifically, a through hole can be arranged on the shell, a pipeline can pass through the through hole to reach the pressure cavity, and the pressure cavity can be pressurized. When the pressure reaches a preset value, the pressurizing pump can be closed. The pressurizing pump has a one-way valve to prevent the pressure in the pressure cavity from being discharged.

[0032] The pressure relief mechanism 2 is used to open or block the pressure relief passage 16, and is arranged in the water inlet cavity 15. In the first state, the pressure relief mechanism 2 blocks the pressure relief passage 16, and the pressure in the water inlet cavity 15 flows to the pressure cavity 53 through the air supplement passage, so that the pressure in the pressure cavity 53 is greater than or equal to the pressure in the water inlet cavity 15, and the sealing element 5 is in the blocking state. Specifically, in the first state, when the condensed water in the water inlet cavity 15 does not reach the preset capacity or is at the level of the water inlet cavity 15, the pressure relief mechanism 2 blocks the pressure relief passage 16. In the second state, the pressure relief mechanism 2 opens the pressure relief passage 16, and the pressure in the pressure cavity 53 flows to the water inlet cavity 15 through the pressure supplement passage 17 and is discharged through the pressure relief passage 16, so that the pressure in the pressure cavity 53 gradually decreases, and when the pressure in the pressure cavity is less than the pressure in the water inlet cavity 15 or the sum of the pressures in the water inlet cavity and the first passage, the sealing element 5 is driven to move upward to open the connecting section. In order to reduce the number of air passages and thus reduce the production cost, the exhaust end of the pressure relief passage 16 is connected to the first passage 18, and when the pressure relief cavity discharges pressure, the pressure flows from the pressure relief passage 16 to the first passage 18, and at this time, the sum of the pressures between the first passage 18 and the water inlet cavity 15 is greater than the pressure in the pressure cavity 53, so that the sealing element 5 is driven to rise and thus open the connecting section to discharge water.

[0033] Specifically, the sealing element 5 is a gas pressure film, which includes a peripheral fixed side 51 and a middle movable part. The middle movable part is driven to move by the pressure difference between the gas pressure cavity and the water inlet cavity 15, so as to open or block the connecting port of the connecting section. The movable part is a protruding part, which can be deformed by the pressure difference between the upper and lower sealing elements. When the pressure below the sealing element is greater than the pressure above the sealing element, the protruding part is deformed upward to open the passage to discharge water. The protruding part is in a downward state in the normal state. Therefore, after the water is discharged, the protruding part is deformed to block the first passage. In the gas pressure embodiment, the first passage can also be blocked by the pressure difference.

[0034] In order to more quickly supplement or discharge pressure in the pressure cavity 53, the number of the pressure supplement passages 17 is greater than the number of the pressure relief passages 16, or the total air passage cross section of the pressure supplement passages 17 is greater than the total air passage cross section of the pressure relief passages 16.

[0035] The pressure relief mechanism 2 comprises a floating ball 214 assembly 21, a blocking piece 23 and a fixed piece 22, one end of the fixed piece 22 is fixed to the inside of the shell 1, the other end extends towards the water inlet cavity 15, the floating ball 214 assembly 21 has a fixed end, the fixed end is respectively hinged to the blocking piece 23 and the fixed piece 22, the hinged ends of the blocking piece 23 and the fixed piece 22 are arranged in an up-down staggered manner with the fixed end, so that the floating ball 214 assembly 21 drives the blocking piece 23 to move downward in the process of upward movement, thereby opening the pressure relief channel 16. Specifically, the floating ball 214 assembly 21 comprises a horizontal plate 211, an inclined plate 213, a floating ball 214 and two vertical plates 212; the two vertical plates 212 are vertically arranged on both sides of the upper end surface of the horizontal plate 211. The inclined plate 213 is arranged obliquely on the bottom surface or side wall of the horizontal plate 211, and the horizontal plate 211, the vertical plate 212 and the inclined plate 213 form a fixed part, the blocking piece 23 and the fixed piece 22 are respectively hinged to the vertical plate 212 through a hinge rod, and the blocking piece is movably connected with the hinge rod; the floating ball 214 is connected with the inclined plate 213. The floating ball 214 is arranged obliquely on the inclined plate 213, so that it has a larger floating space; a filter screen 3 is arranged in the water inlet cavity 15, the filter screen 3 is located between the water inlet 11 and the floating ball 214, can isolate impurities in the condensed water on one side of the water inlet 11, and the overall drainage height is relatively high, which can effectively avoid that the impurities are blocked in a short period of time to cause the water inlet to be unable to enter, thereby affecting the drainage.

[0036] In order to ensure safety, the top of the shell 1 is provided with a mounting hole for mounting a pressure relief valve, the mounting hole can be mounted with a pressure relief valve according to actual needs or sealed with a sealing plug. In order to prevent the formation of a water seal inside the drain, the top of the shell 1 is provided with a gas return air hole for mounting a gas return pipe, and the condensed water will not enter the inside of the product (equipment) due to the water seal; in order to facilitate observation of the running condition inside the drain, the sidewall of the shell 1 is also provided with a perspective window 19.

[0037] It also comprises a manually pressure relief pressure relief pipe 41 group 4, the shell 1 is located above the pressure cavity 53 and is provided with a mounting groove, the pressure relief pipe 41 group 4 is arranged in the mounting groove, the pressure relief pipe group 41 comprises a first state when pressed and a second state when pressed; when the pressure relief pipe 41 group 4 is in the first state, the pressure cavity 53 is not communicated with the pressure relief channel 16; when the pressure relief pipe 41 group 4 is in the second state, the pressure cavity 53 is communicated with the pressure relief channel 16.

[0038] Specifically, the pressure relief group includes a pressure relief pipe 41, a pressing rod 42, a sealing ring 44 and a reset member 43. The pressure relief pipe 41 is provided with a first air passage along an axis and a second air passage penetrating the pressure relief pipe 41 in a radial direction. The second air passage is in communication with the first air passage and the pressure relief passage 16. The pressing rod 42 penetrates the first passage 18 and includes a sealing end and a pressing end. The sealing ring 44 is installed on the sealing end, and the reset member 43 is installed on the pressing end. The sealing end is located in the pressure chamber 53, and the pressing end is located outside the pressure chamber 53. The diameter of the pressing rod 42 is smaller than that of the first passage 18, so that a gap for discharging air is formed between the pressing rod 42 and the pressure relief pipe 41.

[0039] Working principle:

[0040] Automatic drainage: The condensed water enters the water inlet chamber 15 from the water inlet 11. In this embodiment, the filter screen 3 can divide the water inlet chamber 15 into two spaces in communication with each other, specifically, a right filter space 151 and a left drainage space 152. Due to the filter screen 3 arranged in the water inlet chamber 15, impurities carried in the condensed water entering the water inlet chamber 15 will deposit in the right filter space 151. As the condensed water increases, the pressure of the water inlet chamber 15 gradually increases and flows to the pressure chamber 53 through the pressure supplement passage 17, so that the pressure in the pressure chamber 53 increases, the sealing ring 44 is pressed downward, the first passage 18 is blocked, and the first passage 18 cannot pass water. In other embodiments, the pressure chamber 53 can also be provided with an inlet pressure passage penetrating to the outside in the shell 1. The pressure chamber 53 is pressurized by an external pressure pump or other equipment capable of pressurizing the pressure chamber 53, so as to drive the sealing member 5 to move downward, thereby sealing the first passage 18. As the condensed water in the water inlet chamber 15 gradually increases, the condensed water gradually reaches the height of the float ball 214, and the float ball 214 is driven to rise by the buoyancy of the condensed water. The float ball 214 is hinged between the fixed end and the fixed member 22 and the blocking member 23, so that the blocking member 23 can move downward, thereby opening the pressure relief passage 16. The pressure relief passage 16 discharges the pressure of the pressure chamber 53 and the water inlet chamber 15, so that the pressures of the two chambers are consistent. The other end of the pressure relief passage 16 communicates with the first passage 18, discharges the pressure to the first passage 18, and then makes the sum of the pressure in the first passage 18 and the pressure in the water inlet chamber 15 greater than the pressure in the pressure chamber 53. The sealing ring 44 is pushed upward by the pressure, thereby opening the first passage 18 for drainage. When the drainage is completed, the water level of the condensed water in the water inlet chamber 15 is lower than the height of the float ball 214, the float ball 214 is lowered by its own gravity, and the blocking member 23 blocks the pressure relief passage 16. The pressure of the pressure chamber 53 gradually increases, and the first passage 18 is closed.

[0041] Manual pressure relief:

[0042] By pressing the pressing rod 42 of the pressure relief pipe 41 group 4, the pressing rod 42 drives the sealing ring 44 to be separated from the air inlet of the first air passage, and the air pressure in the pressure cavity 53 is discharged along with the first air passage, the second air passage and the first channel 18 at one time, at this time, the pressure in the pressure cavity 53 is less than the pressure in the water inlet cavity 15 and the first channel 18, and the pressure in the first channel 18 and the water inlet cavity 15 drives the sealing piece 5 to float upward to open the first channel 18 to drain water; when the pressure relief is completed, the pressing rod 42 is released, the pressing rod 42 is reset through the reset key, and the sealing ring 44 is driven to reseal the first air passage. The water inlet cavity 15 pressurizes the pressure cavity 53 through the pressure supplement channel 17, drives the sealing piece 5 to reseal the first channel 18, so as to close the drainage.

[0043] The above is only the embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation obtained by using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, is also included in the patent protection range of the present application.

Claims

1. A drainer, characterized in that, include, The housing has a water inlet chamber, a pressure chamber, a first channel, a water inlet, and a water outlet, wherein the water inlet is connected to the water inlet chamber; A sealing element disposed within the pressure chamber; A pressure relief mechanism is used to control the pressure state of the pressure chamber; In the first state, when the pressure in the pressure chamber is greater than or equal to the pressure in the water inlet chamber, the seal blocks the first channel, preventing the water inlet chamber from communicating with the first channel. In the second state, when the pressure in the pressure chamber is less than the pressure in the water inlet chamber or less than the sum of the pressures in the water inlet chamber and the first channel, the liquid in the water inlet chamber pushes up the seal, allowing the water inlet chamber to communicate with the first channel, and the liquid in the water inlet chamber is discharged to the drain outlet through the first channel.

2. The drainer according to claim 1, characterized in that, The housing is also provided with a pressure relief channel and at least one pressure replenishing channel. One end of the pressure replenishing channel is connected to the water inlet chamber, and the other end is connected to the pressure chamber. The pressure relief mechanism is used to open or block the pressure relief channel. In the first state, the pressure relief mechanism blocks the pressure relief channel, and the pressure in the water inlet chamber flows to the pressure chamber through the pressure replenishing channel. In the second state, the pressure relief mechanism opens the pressure relief channel, and the pressure in the pressure chamber is discharged through the pressure replenishing channel and the pressure relief channel, so that the pressure in the pressure chamber is less than the pressure in the water inlet chamber, thereby opening the seal to drain water.

3. The drainer according to claim 2, characterized in that, The total air passage cross-section of the pressure replenishment channel is greater than that of the total air passage cross-section of the pressure relief channel.

4. The drainer according to claim 2, characterized in that, The exhaust end of the pressure relief channel is connected to the first channel.

5. The drainer according to claim 2, characterized in that, The pressure relief mechanism includes a float assembly, a sealing element, and a fixing element; one end of the fixing element is fixed inside the housing, and the other end extends toward the water inlet chamber; the float assembly has a fixed end, which is hinged to the sealing element and the fixing element respectively. The sealing element and the fixing element are offset vertically from the hinged end of the fixed end. When the float assembly moves upward, it drives the sealing element to move downward, thereby opening the pressure relief channel.

6. The drainer according to claim 5, characterized in that, The float assembly includes a horizontal plate, an inclined plate, a float, and two vertical plates. The two vertical plates are vertically arranged on both sides of the upper surface of the horizontal plate, and the inclined plate is inclinedly arranged on the bottom surface or side wall of the horizontal plate. The horizontal plate, vertical plates, and inclined plates form the fixed end. The sealing member and the fixing member are respectively hinged to the two vertical plates through hinge rods. The float is connected to the inclined plate.

7. The drainer according to claim 2, characterized in that, It also includes a pressure relief pipe assembly. The housing is provided with a mounting groove above the pressure chamber. The pressure relief pipe assembly is disposed in the mounting groove. The pressure relief pipe assembly includes a first state when not pressed and a second state when pressed. In the first state, the pressure chamber is not connected to the pressure relief channel. In the second state, the pressure chamber is connected to the pressure relief channel.

8. The drainer according to claim 7, characterized in that, The pressure relief pipe assembly includes a pressure relief pipe, a pressing rod, a sealing ring, and a reset component. The pressure relief pipe has a first venting channel along its axis and a second venting channel that penetrates radially through the pressure relief pipe. The second venting channel communicates with the first venting channel and the pressure relief channel. The pressing rod is disposed through the first channel and includes a sealing end and a pressing end. The sealing ring is installed at the sealing end, and the reset component is installed at the pressing end. The sealing end is located inside the pressure chamber, and the pressing end is located outside the pressure chamber. The diameter of the pressing rod is smaller than the diameter of the first channel.

9. The drainer according to claim 1, characterized in that, The top of the housing is provided with a pressure relief mounting hole for installing a pressure relief valve.

10. The drainer according to claim 1, characterized in that, The top of the housing is provided with a return air hole for installing a return air pipe.

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