CN106679013B

CN106679013B - Soil source foundation soil-growing cave dwelling passive ventilation dehumidification system and construction method thereof

Info

Publication number: CN106679013B
Application number: CN201610801820.XA
Authority: CN
Inventors: 杨晓林; 吕红医; 李建东; 唐丽; 刘哲
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2016-09-05
Filing date: 2016-09-05
Publication date: 2022-02-15
Anticipated expiration: 2036-09-05
Also published as: CN106679013A

Abstract

The invention discloses a soil source based soil-growing cave dwelling passive ventilation dehumidification system, which comprises a fresh air pipe obliquely arranged along a cave leg of a cave dwelling, wherein the fresh air pipe is buried in soil and has a gradient less than or equal to 20%; the soil source heat exchange device is connected in series on the fresh air pipe, the fresh air pipe is provided with three rows in parallel, the bottoms of the fresh air pipes are mutually communicated through a transverse connecting pipe, and the transverse connecting pipe is connected with a U-shaped condensate pipe; the transverse connecting pipe is connected with an air supply device; the top wall of the kiln chamber is provided with an air pulling device, and the bottom of the air pulling pipe is provided with an air quantity adjusting device. The invention also discloses a construction method of the passive ventilation and dehumidification system. The invention does not need energy source and refrigerant when cooling or heating the interior of the cave, does not cause environmental pollution, can improve the freshness of the air in the cave, prevents 'air conditioning diseases' caused by the 'indoor circulation' mode of the traditional air conditioner, and does not destroy the integrity and the originality of the existing appearance of the traditional cave dwelling after construction.

Description

Soil source foundation soil-growing cave dwelling passive ventilation dehumidification system and construction method thereof

Technical Field

The invention relates to the technical field of air conditioning, in particular to a temperature and humidity adjusting structure of a raw soil cave.

Background

The traditional earth cave dwelling has the building characteristics of being warm in winter and cool in summer, and belongs to a natural ecological house. However, because of the poor indoor ventilation effect, the phenomena of indoor mildew and moisture condensation and the like often occur, and the living quality of the cave dwelling house is seriously influenced.

The known ventilation improvement technology of the traditional earth cave mainly comprises two technologies: 1) one is to use the split air conditioner, its working principle is mainly that the compressor sucks the gaseous refrigerant of low pressure, is compressed into the gas of high-temperature high-pressure; then the high-temperature high-pressure gaseous refrigerant flows to an outdoor condenser and is gradually condensed into high-temperature high-pressure liquid in the process of radiating heat to the outdoor; then, the mixture is decompressed (and simultaneously cooled) by the throttling device to become a gas-liquid mixture with low temperature and low pressure. The gas-liquid mixed refrigerant enters an indoor evaporator and is continuously vaporized by absorbing heat in indoor air, so that the effect of cooling is achieved. However, the split air conditioner needs to use a large amount of energy, the manufacturing cost is high, the original property and integrity of the existing appearance of the traditional residential building are damaged by the connection and arrangement of the outdoor unit and the indoor unit, and air conditioner is easy to cause 'air conditioner diseases' because no outdoor fresh air is sent into the room and the air conditioner is used in a closed environment for a long time.

2) The other type uses a ventilation device with a wind cap, and the working principle of the ventilation device is that the wind cap is arranged on the top of the kiln, a pipeline fan is arranged at the position of the wind cap close to the kiln hole room, and the ventilation device is matched with the opening of a kiln hole door and window and achieves the effect of improving the indoor wind environment of the kiln hole through the effects of indoor wind pressure ventilation and wind drawing ventilation. However, the ventilation hood and the kiln hole door and window are opened to form convection, so that the indoor wind environment of the kiln hole is effectively improved, the indoor heat loss of the kiln hole is caused, and the excellent thermal characteristics of the kiln hole, namely warm in winter and cool in summer, are changed.

Disclosure of Invention

The invention aims to provide a soil source based soil-growing cave passive ventilation and dehumidification system which can keep the excellent characteristics of warmness in winter and coolness in summer of a cave, can continuously feed fresh air into the cave to improve the air environment inside the cave, does not need to use a refrigerant and does not need to use energy.

In order to achieve the purpose, the soil source based soil-producing cave hole passive ventilation and dehumidification system comprises a fresh air pipe which is obliquely arranged along a cave leg of the cave hole, wherein the fresh air pipe is buried in soil and the gradient of the fresh air pipe is less than or equal to 20%; the fresh air pipe is connected in series with a soil source heat exchange device,

the soil source heat exchange device comprises an upper gas collecting box and a lower gas collecting box, and the center of the lower surface of the upper gas collecting box is connected with the center of the upper surface of the lower gas collecting box through a connecting column; the upper air collecting box is communicated with the lower air collecting box through a plurality of air guide pipes, and the air guide pipes are uniformly distributed by taking the connecting column as the center; a plurality of heat transfer plates are arranged between the upper air collecting box and the lower air collecting box at intervals, and the heat transfer plates are vertical to the air guide pipes; a plurality of irregularly-shaped heat transfer holes are uniformly distributed on the heat transfer plate; the connecting column and each gas guide pipe penetrate through the heat transfer plate and are fixedly connected with the heat transfer plate;

taking the soil source heat exchange device as a boundary, taking a fresh air pipe above the soil source heat exchange device as an upstream fresh air pipe, and taking a fresh air pipe below the soil source heat exchange device as a downstream fresh air pipe;

the fresh air pipes are arranged in three rows in parallel, the top end of each upstream fresh air pipe is provided with an air inlet, the air inlets extend out of the top of the kiln, and the bottom end of each upstream fresh air pipe is connected with an upper air collecting box; the upper ends of the downstream fresh air pipes are connected with a lower air collecting box, the bottoms of the downstream fresh air pipes are communicated with each other through a transverse connecting pipe, the transverse connecting pipe is downwards connected with a U-shaped condensate pipe, and the other end of the U-shaped condensate pipe is opened outside the kiln hole; the transverse connecting pipe is upwards connected with an air supply device;

the air supply device comprises a vertical pipe, the bottom end of the vertical pipe is communicated with the transverse connecting pipe, the top of the vertical pipe extends into the kiln chamber and is connected with an elbow, the elbow is connected with an air outlet which is horizontally arranged, and the air outlet and the air inlet are both provided with dustproof filter screens;

the top wall of the kiln hole chamber is provided with a plurality of gas drawing devices, each gas drawing device comprises a gas drawing pipe, the lower end of each gas drawing pipe is positioned in the kiln hole chamber, and the upper end of each gas drawing pipe protrudes upwards out of the kiln top; the opening at the top of the air drawing pipe is covered with a hood, and the hood is connected to the air drawing pipe through a connecting rod; the bottom of the air extracting pipe is provided with an air quantity adjusting device; the air outlet and the air pulling device are positioned on two opposite sides in the kiln chamber.

The top of the transverse connecting pipe right above the U-shaped condensate pipe is provided with a water retaining bulge, the water retaining bulge is in a conical shape with a large upper part and a small lower part, and the tip of the water retaining bulge is downwards opposite to the opening of the U-shaped condensate pipe.

The middle part of the vertical pipe is provided with a pipeline fan.

The air quantity adjusting device comprises an upper orifice plate and a lower orifice plate, wherein an external thread is arranged on the excircle of the upper orifice plate, and the upper half part of the upper orifice plate extends into the bottom end of the air drawing pipe and is in threaded connection with the air drawing pipe; the lower surface of the upper orifice plate is attached to the upper surface of the lower orifice plate;

an annular rotating connecting part is arranged on the outer circle of the lower pore plate in an upward protruding mode, the inner diameter of the rotating connecting part is the same as the outer diameter of the upper pore plate, an annular sliding groove is formed in the rotating connecting part, the upper pore plate is fixedly connected with a sliding ring, and the sliding ring is clamped into the annular sliding groove;

the upper pore plate and the lower pore plate are provided with a plurality of air drawing holes at corresponding positions, and the distance between two adjacent air drawing holes in the circumferential direction is larger than the diameter of the air drawing holes.

The invention also aims to provide a construction method of the soil source foundation soil cave dwelling passive ventilation and dehumidification system.

In order to achieve the purpose, the construction method of the soil source foundation soil cave passive ventilation and dehumidification system comprises the following steps:

the method comprises the following steps that a first step is to excavate a foundation pit along the kiln top and the kiln legs of a kiln hole, and a second step is to lay three upstream fresh air pipes which are arranged side by side at intervals, three downstream fresh air pipes which are arranged side by side at intervals and a soil source heat exchange device in the foundation pit, connect an upper air collecting box with each upstream fresh air pipe, and connect a lower air collecting box with each downstream fresh air pipe;

the second step is to use a transverse connecting pipe to connect the bottom of each downstream fresh air pipe, and connect an air supply device and a U-shaped condensate pipe on the transverse pipe, and set a water retaining bulge on the top of the transverse connecting pipe right above the U-shaped condensate pipe, so that the tip of the water retaining bulge is downward opposite to the opening of the U-shaped condensate pipe;

the third step which is not in sequence with the first step and the second step is also included;

the third step is that three air extracting pipes which are vertically arranged are firstly penetrated on the top wall in the cave chamber,

then, connecting the bottom of each air extracting pipe with an air quantity adjusting device through threads, specifically, connecting the upper hole plate to the bottom of the air extracting pipe through threads; and simultaneously, the top of each air pulling pipe is provided with a hood used for shielding the opening at the top of the air pulling pipe through a connecting rod.

The invention can utilize the cold or heat contained in the soil covering soil layer on the kiln top and the kiln legs, can adjust the indoor temperature of the kiln without using the refrigerant, and can not cause the influence on the environment (for example, the ozone layer can be damaged when R22 is used in a large amount). In the invention, the ventilation is mainly realized by the air drawing device, and the automatic ventilation is carried out by utilizing the air pressure, so that the automatic ventilation can be realized without energy sources, and the energy is saved.

The invention can accurately adjust the air quantity of air extraction through the air quantity adjusting device, achieves the optimal passive ventilation effect, can open the pipeline fan to perform forced ventilation when a large amount of air exchange is needed in a short time, has very flexible use mode, and can meet the requirements of various air conditioning of the kiln hole life.

The U-shaped condensate pipe is lower in position, air at the position is not fresh than air at the ground surface, and if air is sucked from the position, air flow cannot pass through the soil source heat exchange device and the longer fresh air pipe, so that the effect of ground source heat exchange cannot be achieved, and the temperature condition in the kiln chamber cannot be improved. The U-shaped condensate pipe is arranged, so that condensate water can be discharged, and the water seal formed by the U-shaped condensate pipe is utilized to prevent air at the U-shaped condensate pipe from being pumped into the kiln chamber. The U-shaped condensate pipe can discharge condensate water, so that the dehumidification effect is achieved. In a word, the U-shaped condensate water has the functions of dehumidifying, preventing air from being sucked from the U-shaped condensate water and eliminating the temperature regulation effect, and has important significance for ensuring the normal operation of the ventilation and dehumidification system.

The water retaining bulge can collect dispersed condensate water flowing along the pipe wall of the downstream fresh air pipe and drop the condensate water into the U-shaped condensate pipe, so that the dehumidification effect of the invention is enhanced.

When fresh air reaches the soil source heat exchanger through the upstream fresh air pipe, the air enters each air guide pipe through the upper air collecting box, and the heat transfer plates connected with the air guide pipes play a role of heat transfer fins, so that heat (or cold) in air flow in the air guide pipes can be quickly dissipated into soil, and the air in the air guide pipes can more quickly absorb the cold (or heat) in the soil. The heat transfer holes are irregular in shape, and compared with circular holes, square holes or elliptical holes, the side length of the heat transfer holes is longer under the condition that the areas of the heat transfer holes are the same, so that the contact area of the heat transfer plates and soil is increased, and the heat transfer speed is increased. The ground source heat exchange structure with the soil source heat exchange device and the fresh air pipe has higher ground source heat exchange efficiency, can more quickly reduce (increase) the air supply temperature by utilizing the ground source cold (heat), and more fully utilizes the ground source cold (heat).

The construction method disclosed by the invention is simple in steps and high in construction speed, and the integrity and the originality of the existing appearance form of the traditional cave dwelling can not be damaged.

The invention can reduce the temperature (summer) or raise the temperature (winter) in the cave without energy and refrigerant, without causing environmental pollution, improve the freshness of the air in the cave, prevent the air-conditioning diseases caused by the refrigeration and heating mode of the traditional air-conditioning indoor circulation, is suitable for the reconstruction of the existing cave and has good popularization and application values.

Drawings

FIG. 1 is a schematic structural view of the present invention

FIG. 2 is a schematic view of the structure of an air volume adjusting device;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic view of a connection structure of a soil source heat exchange device and a fresh air pipe;

FIG. 5 is a cross-sectional view of the soil source heat exchange device of FIG. 4 at a heat transfer plate;

FIG. 6 is a plan view of a raw soil cave pit kiln;

FIG. 7 is an enlarged view at G of FIG. 1;

fig. 8 is a schematic structural view of the air blowing device.

Detailed Description

In fig. 6, a part a is shown at a kiln leg, a part B is shown at a foundation pit excavation part in fig. 6, a part C is shown at a kiln chamber of the earth cave of the pit kiln, a part D is shown at an outer contour of the pit kiln in fig. 6, a part E is shown at a ceiling of the pit kiln in fig. 6, and a part F is shown at a ceiling of the pit kiln in fig. 6.

The direction indicated by the arrow in fig. 1 is the direction of the air flow there.

As shown in fig. 1 to 8, the soil source based soil-producing cave passive ventilation dehumidification system of the invention comprises a fresh air pipe which is obliquely arranged along the cave legs of the cave, the fresh air pipe is buried in soil, and the gradient of the fresh air pipe is less than or equal to 20%; the fresh air pipe is connected with a soil source heat exchange device 1 in series.

The soil source heat exchange device 1 comprises an upper gas collecting box 2 and a lower gas collecting box 3, wherein the center of the lower surface of the upper gas collecting box 2 is connected with the center of the upper surface of the lower gas collecting box 3 through a connecting column 4; the upper air collecting box 2 is communicated with the lower air collecting box 3 through a plurality of air ducts 5, and the air ducts 5 are uniformly distributed by taking the connecting column 4 as the center; a plurality of heat transfer plates 6 are arranged between the upper air collecting box 2 and the lower air collecting box 3 at intervals, and the heat transfer plates 6 are vertical to the air guide pipes 5; a plurality of irregularly-shaped heat transfer holes 7 are uniformly distributed on the heat transfer plate 6; the connecting column 4 and each gas guide pipe 5 penetrate through the heat transfer plate 6 and are fixedly connected with the heat transfer plate 6;

taking the soil source heat exchange device 1 as a boundary, taking a fresh air pipe above the soil source heat exchange device 1 as an upstream fresh air pipe 8, and taking a fresh air pipe below the soil source heat exchange device 1 as a downstream fresh air pipe 9;

when fresh air reaches the soil source heat exchange device 1 through the upstream fresh air pipe 8, the air enters each air guide pipe 5 through the upper air collecting box 2, and the heat transfer plates 6 connected with the air guide pipes 5 play a role of heat transfer fins, so that heat (or cold) in air flow in the air guide pipes 5 can be quickly dissipated into the soil, and the heat (or cold) in the soil can be quickly absorbed by the air in the air guide pipes 5. The heat transfer holes 7 are irregular in shape, and have longer side length than circular holes, square holes or elliptical holes in the same area, so that the contact area between the heat transfer plate 6 and the soil is increased, and the heat transfer speed is increased. The ground source heat exchange structure with the soil source heat exchange device and the fresh air pipe has higher ground source heat exchange efficiency, can more quickly reduce (increase) the air supply temperature by utilizing the ground source cold (heat), and more fully utilizes the ground source cold (heat).

The fresh air pipes are arranged in three rows side by side, the top end of each upstream fresh air pipe 8 is provided with an air inlet 17, and the air inlets 17 extend out of the kiln top. The bottom end of each upstream fresh air pipe 8 is connected with the upper air collecting box 2; the upper ends of the downstream fresh air pipes 9 are connected with the lower air collecting box 3, the bottoms of the downstream fresh air pipes 9 are communicated with each other through a transverse connecting pipe 10, the transverse connecting pipe 10 is downwards connected with a U-shaped condensate pipe 11, and the other end of the U-shaped condensate pipe 11 is opened outside the kiln chamber; the cross connection pipe 10 is upwardly connected with an air supply device 12.

The U-shaped condensate pipe is lower in position, air at the position is not fresh than air at the ground surface, and if air is sucked from the position, air flow cannot pass through the soil source heat exchange device and the longer fresh air pipe, so that the effect of ground source heat exchange cannot be achieved, and the temperature condition in the kiln chamber cannot be improved. The U-shaped condensate pipe is arranged, so that condensate water can be discharged, and the water seal formed by the U-shaped condensate pipe is utilized to prevent air at the U-shaped condensate pipe from being pumped into the kiln chamber.

The air supply device 12 comprises a vertical pipe 13, the bottom end of the vertical pipe 13 is communicated with the transverse connecting pipe 10, the top of the vertical pipe 13 extends into the kiln chamber 14 and is connected with an elbow 15, the elbow 15 is connected with a horizontally arranged air outlet 16, and the air outlet 16 and the air inlet 17 are both provided with dustproof filter screens; the screen is a conventional device, not shown.

The top wall of the kiln chamber 14 is provided with a plurality of gas-pulling devices, each gas-pulling device comprises a gas-pulling pipe 18, the lower end of each gas-pulling pipe 18 is positioned in the kiln chamber 14, and the upper end of each gas-pulling pipe extends upwards out of the top wall of the kiln chamber 14, namely protrudes out of the kiln top; an opening at the top of the air extracting pipe 18 is covered with a hood 19, and the hood 19 is connected to the air extracting pipe 18 through a connecting rod 20; the bottom of the air extracting pipe 18 is provided with an air quantity adjusting device 21; the air outlet 16 and the air pulling device are positioned on two opposite sides in the kiln chamber 14. Therefore, fresh air blown into the room from the air outlet 16 is ensured not to be pulled out immediately by the air pulling device but to flow indoors, and the air pulling device can only directly pull out air on the opposite side of the air outlet 16 in the kiln chamber 14.

The top of the transverse connecting pipe 10 right above the U-shaped condensate pipe 11 is provided with a water retaining bulge 22, the water retaining bulge 22 is in a conical shape with a large upper part and a small lower part, and the tip of the water retaining bulge 22 is downwards opposite to the opening of the U-shaped condensate pipe 11.

The middle part of the vertical pipe 13 is provided with a pipeline fan 23. So that the duct fan 23 can be turned on to meet the need when a large amount of ventilation is required in the cave chamber 14 in a short time. When wind and air pulling out effects are not obvious outdoors, the pipeline fan 23 can be started to perform forced ventilation. The air volume adjusting device 21 comprises an upper orifice plate 24 and a lower orifice plate 25, the excircle of the upper orifice plate 24 is provided with external threads, and the upper half part of the upper orifice plate 24 extends into the bottom end of the gas drawing pipe 18 and is in threaded connection with the gas drawing pipe 18; the lower surface of the upper orifice plate 24 is attached to the upper surface of the lower orifice plate 25;

an annular rotating connecting part 26 is convexly arranged on the outer circle of the lower pore plate 25 in an upward protruding mode, the inner diameter of the rotating connecting part 26 is the same as the outer diameter of the upper pore plate 24, an annular sliding groove is formed in the rotating connecting part 26, the upper pore plate 24 is fixedly connected with a sliding ring 27, and the sliding ring 27 is clamped in the annular sliding groove;

the upper orifice plate 24 and the lower orifice plate 25 are provided with a plurality of air extraction holes 28 at corresponding positions, and the distance between two adjacent air extraction holes 28 in the circumferential direction is larger than the diameter of the air extraction holes 28. Thereby ensuring that the air extraction holes 28 of the upper and

lower orifice plates

24, 25 are completely staggered when the lower orifice plate 25 is rotated, thereby completely closing the air extraction pipe 18. The degree of the stagger of the air extraction holes 28 on the upper and

lower pore plates

24, 25 can be adjusted by adjusting the rotation angle of the lower pore plate 25. When the air drawing holes 28 on the upper and

lower pore plates

24, 25 are right opposite, the opening degree of the air drawing pipe 18 reaches the maximum degree, and the air drawing effect is strongest at the moment; when the air drawing holes 28 on the upper and

lower pore plates

24, 25 are gradually staggered, the opening degree of the air drawing pipe 18 is gradually reduced, and the air drawing effect is gradually reduced; when the air-extracting holes 28 on the upper and

lower orifice plates

24, 25 are completely staggered, the air-extracting tube 18 is completely closed, and the air-extracting tube 18 has no air-extracting effect.

The slip ring 27 and the slide groove are arranged so that the lower orifice plate 25 does not have a gap between the upper and

lower orifice plates

24, 25 while rotating relative to the upper orifice plate 24.

The fresh air pipe is a PVC pipeline with a pipe diameter of 110 cm, the U-shaped condensate pipe 11 is a U-shaped PVC pipeline with a pipe diameter of 50 cm, and the total length of the fresh air pipe and the soil source heat exchange device 1 is more than or equal to 15 m. And in the three rows of fresh air pipes, the distance between two adjacent rows of fresh air pipes is more than or equal to 1 meter. In order to prevent sundries and ant and insect caves at the opening of the pipeline, all the openings are sealed and protected by a filter screen (preferably a gauze screen), and are periodically cleaned and maintained.

The invention also provides a construction method of the passive ventilation and dehumidification system using the soil source foundation earth-growing cave, which comprises the following steps:

the method comprises the following steps that a first step is to excavate a foundation pit along a kiln top covering soil layer and a kiln leg of a kiln hole, a second step is to lay three upstream fresh air pipes 8 which are arranged side by side at intervals, three downstream fresh air pipes 9 which are arranged side by side at intervals and a soil source heat exchange device 1 in the foundation pit, connect an upper air collecting box 2 with each upstream fresh air pipe 8 and connect a lower air collecting box 3 with each downstream fresh air pipe 9;

the second step is to use a transverse connecting pipe 10 to connect the bottom of each downstream fresh air pipe 9, connect an air supply device 12 and a U-shaped condensate pipe 11 on the transverse pipe, and arrange a water retaining bulge 22 on the top of the transverse connecting pipe 10 right above the U-shaped condensate pipe 11, so that the tip of the water retaining bulge 22 faces downwards to the opening of the U-shaped condensate pipe 11;

the third step is to firstly penetrate three gas drawing pipes 18 which are vertically arranged on the inner top wall of the kiln chamber 14,

then, the bottom of each air extracting pipe 18 is connected with an air quantity adjusting device 21 through screw threads, and specifically, an upper orifice plate 24 is connected to the bottom of the air extracting pipe 18 through screw threads; and a hood 19 for shielding the top opening of the air extracting pipe 18 is arranged at the top of each air extracting pipe 18 through a connecting rod 20.

When in use, a user rotates the lower orifice plate 25 of the air quantity adjusting device 21 in the cave chamber 14, so that the air drawing holes 28 on the lower orifice plate 25 are communicated with the air drawing holes 28 on the upper orifice plate 24, and the air drawing pipe 18 generates the effects of drawing air and ventilating. Negative pressure generated by the air extracting pipe 18 in a room acts on the air supply device 12 and the fresh air pipe through the air outlet 16, so that outdoor fresh air is sucked into the fresh air pipe from the air inlet 17, the fresh air fully exchanges heat with soil when passing through the fresh air pipe and the soil source heat exchange device 1, the fresh air is cooled by the soil in summer, and the fresh air is heated by the soil in winter; the fresh air after heat exchange enters the air supply device 12 through the transverse connecting pipe 10 and is finally sent into the room through the air outlet 16, so that the indoor temperature condition and the indoor air freshness are improved.

In summer, the outdoor air is sucked into the fresh air pipe and the soil source heat exchange device 1 and is cooled by soil, and then condensed water is generated. If the condensed water is not treated, the humidity of the air in the kiln chamber 14 is increased, and after the humidity of the air is increased, the evaporation speed of moisture (sweat) is slowed, so that the humidity in the kiln chamber is easily caused, and the dew condensation on the inner wall of the kiln chamber is easy to cause stuffiness of people. By adopting the structure of the invention, when the condensed water flows along the fresh air pipe, the condensed water meets the water-retaining bulge 22 and then is converged at the water-retaining bulge 22, and after more condensed water is converged, the condensed water drops down along the tip of the lower part of the water-retaining bulge 22 and just falls into the U-shaped condensed water pipe 11. The condensed water is discharged out of the cave after passing through the U-shaped condensed water pipe 11, so that the influence of the condensed water on the air in the cave chamber 14 is improved, and the quality of the air in the cave is improved.

When the air extraction needs to be stopped, the lower orifice plate 25 is rotated to completely stagger the air extraction holes 28 on the upper orifice plate 24 and the lower orifice plate 25. When the gas extraction effect is required to be started, the lower pore plate 25 is rotated to communicate the gas extraction holes 28 on the upper pore plate 24 and the lower pore plate 25; the alignment degree of the air drawing holes 28 on the upper and

lower pore plates

24 and 25 is adjusted by rotating the lower pore plate 25, and the air drawing effect is maximum when the air drawing holes are completely aligned; when a large amount of ventilation is needed in a short time, the pipeline fan 23 is started to perform forced ventilation, and the air condition in the kiln chamber 14 is rapidly improved.

Because the invention is provided with a plurality of sets of air extracting devices, the air extracting effect of each set of air extracting device can be accurately adjusted, so the invention can carry out very accurate fine adjustment on the air extracting effect and adjust the indoor passive ventilation speed to the moderate degree that people feel most comfortable. When people sleep at night or have patients at home, the effect of drawing out the breath can be reduced to the most appropriate degree.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.

Claims

1. Soil source base immature soil cave passive form ventilation dehumidification system, its characterized in that: the device comprises a fresh air pipe obliquely arranged along a kiln leg of the kiln hole, wherein the fresh air pipe is buried in soil and has a gradient less than or equal to 20%; the fresh air pipe is connected in series with a soil source heat exchange device,

2. The soil source-based earth-growing cave of claim 1, wherein: the top of the transverse connecting pipe right above the U-shaped condensate pipe is provided with a water retaining bulge, the water retaining bulge is in a conical shape with a large upper part and a small lower part, and the tip of the water retaining bulge is downwards opposite to the opening of the U-shaped condensate pipe.

3. The soil source-based earth-producing cave of claim 1 or 2, wherein: the middle part of the vertical pipe is provided with a pipeline fan.

4. The soil source-based earth-growing cave of claim 3, wherein: the air quantity adjusting device comprises an upper orifice plate and a lower orifice plate, wherein an external thread is arranged on the excircle of the upper orifice plate, and the upper half part of the upper orifice plate extends into the bottom end of the air drawing pipe and is in threaded connection with the air drawing pipe; the lower surface of the upper orifice plate is attached to the upper surface of the lower orifice plate;

5. The construction method of the soil source based earth-growing cave dwelling passive ventilation dehumidification system in claim 4 is characterized by comprising the following steps in sequence: