CN210124153U

CN210124153U - Soil heating system

Info

Publication number: CN210124153U
Application number: CN201920443493.4U
Authority: CN
Inventors: 高亮; 于晓丹; 程海泉; 何亚锐; 郝伟; 董倩倩; 杨洪波; 贾焕; 汪天宇
Original assignee: Elioner Ecological Remediation Co Ltd
Current assignee: Elioner Ecological Remediation Co Ltd
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2020-03-06
Anticipated expiration: 2029-04-02

Abstract

The present disclosure relates to a soil warming system comprising a solar collector, a heating element for absorbing heat from the solar collector, a fluid circulation device and a plurality of hollow heat dissipating assemblies for burying in soil; the heating element is internally provided with a fluid space for fluid flow, the fluid space is provided with a first opening and a second opening, each heat dissipation assembly is provided with a third opening and a fourth opening, the first opening of the fluid space is communicated with the third opening of each heat dissipation assembly in a fluid mode through the fluid circulation device, and the second opening of the fluid space is communicated with the fourth opening of each heat dissipation assembly in a fluid mode. The system can realize uniform temperature rise in soil, and has the advantages of appropriate temperature rise range in soil layers with different depths and stability in soil temperature rise.

Description

Soil heating system

Technical Field

The disclosure relates to the technical field of soil warming, in particular to a soil warming system.

Background

The temperature difference between soil and air in the Naqu area in the North Tibetan plateau is large, and the growth of plants is influenced. The existing soil heating modes in the Naqu area in the North-Tibet plateau are mainly mulching films, plastic sheds and the like. The mode can only heat the surface layer of the soil, the temperature-increasing amplitude change is large, the stability is poor, the growth of plant roots is not facilitated, and the mulching film and the plastic shed are easy to cause environmental pollution and influence the local fragile ecological environment.

SUMMERY OF THE UTILITY MODEL

The soil warming system aims to solve the problems of large temperature difference between the earth surface and the deep soil layer, large warming amplitude change and poor stability in the existing soil warming system.

In order to accomplish the above objects, the present disclosure provides a soil warming system including a solar collector, a heating element for absorbing heat from the solar collector, a fluid circulation device, and a plurality of hollow heat dissipation assemblies for burying in soil; the heating element is internally provided with a fluid space for fluid flow, the fluid space is provided with a first opening and a second opening, each heat dissipation assembly is provided with a third opening and a fourth opening, the first opening of the fluid space is communicated with the third opening of each heat dissipation assembly in a fluid mode through the fluid circulation device, and the second opening of the fluid space is communicated with the fourth opening of each heat dissipation assembly in a fluid mode.

Optionally, the system further comprises a first temperature sensor for detecting the temperature of the heating element, a second temperature sensor for detecting the temperature of the heat dissipation assembly, and a controller connected to the first temperature sensor, the second temperature sensor, and the fluid circulation device to control the fluid circulation device to stop operating when the difference between the temperature detected by the first temperature sensor and the temperature detected by the second temperature sensor is below a threshold value, and to control the fluid circulation device to operate when the difference between the temperature detected by the first temperature sensor and the temperature detected by the second temperature sensor is above the threshold value.

Optionally, the heating element is a serpentine tube, the lumen of the serpentine tube being the fluid space.

Optionally, both ends of the serpentine tube are provided with valves for replenishing or draining fluid in the fluid space.

Optionally, each heat dissipation assembly comprises a heat dissipation pipeline and heat dissipation fins distributed along the length direction at the periphery of the heat dissipation pipeline.

Optionally, the number of the heat dissipation assemblies is 2-6 arranged from top to bottom.

Optionally, the heat dissipation pipeline is a steel pipe, a copper pipe or an aluminum pipe, and the heat dissipation fins are made of steel, copper or aluminum.

Optionally, the fluid in the system is a gas or a liquid, the gas is air, and the liquid is water or an antifreeze.

Optionally, the material of the heating element is copper, aluminum or steel.

Optionally, the first opening is in fluid communication with the fluid circulation device, the second opening is in fluid communication with the third opening, and the fourth opening is in fluid communication with the fluid circulation device;

the pipeline comprises a heat insulation layer and a supporting layer from outside to inside, wherein the heat insulation layer is made of rubber and plastic heat insulation materials, and the supporting layer is made of copper, aluminum, steel or plastic materials.

Through above-mentioned technical scheme, for the fluid after turning into heat energy with solar energy in this disclosed system, the fluid flows through bury underground behind a plurality of radiator unit that the layering set up, with the soil horizon of heat transfer for the different degree of depth, has realized the even heating to soil inside, has that the different degree of depth soil horizon inside heats the amplitude and suits, the steady advantage of soil temperature heating.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural diagram of one embodiment of the present disclosure.

Description of the reference numerals

1 solar energy heat collecting part 2 heating part 3 fluid circulating device

4 radiator unit 41 heat dissipation pipeline 42 fin

5 first temperature sensor 6 second temperature sensor 7 controller

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1, the present disclosure provides a soil warming system including a solar collector 1, a heating element 2 for absorbing heat from the solar collector 1, a fluid circulation device 3, and a plurality of hollow heat dissipation assemblies 4 for burying in soil; the inside fluid space that is provided with of heating member 2 is used for fluid flow, the fluid space has first opening and second opening, and every radiator unit 4 all has third opening and fourth opening, the first opening of fluid space passes through fluid circulation equipment 3 with every radiator unit 4's third opening fluid intercommunication, the second opening of fluid space with every radiator unit 4's fourth opening fluid intercommunication.

This system of disclosure in solar energy collection piece can be solar panel, solar panel absorbs the light energy and converts it into the fluid in the heat-insulating material after the heat energy transmission, the fluid constantly circulates in the system under fluid circulation equipment's effect, the fluid carries out the heat transfer with soil after burying underground in the radiator unit of different soil degree of depth, and then heats the soil horizon of the different degree of depth, so that the different degree of depth soil is heated evenly, be favorable to improving the average temperature of soil and the stability of soil temperature, reduce the difference in temperature of soil and air, promote plant roots to develop. The fluid circulation device may be any one of those conventionally used in the art, such as a circulation pump, and other types of circulation devices are not described herein. The first opening and the second opening can be arbitrarily switched to be a fluid inlet or a fluid outlet.

According to the present disclosure, in order to improve the accuracy of the soil temperature control, as shown in fig. 1, the system may further include a first temperature sensor 5 for detecting the temperature of the heating member 2, a second temperature sensor 6 for detecting the temperature of the radiator block 4, and a controller 7, and the controller 7 may be connected to the first temperature sensor 5, the second temperature sensor 6, and the fluid circulation device 3 to control the fluid circulation device 3 to stop operating when the difference between the temperature detected by the first temperature sensor 5 and the temperature detected by the second temperature sensor 6 is lower than a threshold value, and to control the fluid circulation device 3 to operate when the difference between the temperature detected by the first temperature sensor 5 and the temperature detected by the second temperature sensor 6 is higher than the threshold value. The first temperature sensor and the second temperature sensor can be thermocouples, and the controller can be in any form, such as a PLC (programmable logic controller), as long as whether the circulating equipment runs or not can be controlled. The threshold value can be set according to actual needs, and is 5-20 ℃ for example.

The dynamic monitoring of the soil temperature and the system temperature is realized by arranging the first temperature sensor, the second temperature sensor and the controller in the system, so that the temperature can be accurately and intelligently controlled according to the running conditions of the automatic adjusting system for different weather and temperature conditions, the stability of soil temperature increase is further improved, and the amplitude of soil temperature change is reduced. In one specific embodiment, when the temperature difference detected by the first temperature sensor and the second temperature sensor is more than 10-15 ℃, the temperature difference between the soil and the air is too large, the soil temperature is lower, and the fluid circulation equipment starts to work to heat the soil; when the temperature difference detected by the first temperature sensor and the second temperature sensor is less than 10-15 ℃, the temperature difference between the soil and the air is small, the soil temperature is proper, and the fluid circulation equipment stops working to reduce energy consumption.

According to the present disclosure, as shown in fig. 1, the heating member 2 may be a coil, and a lumen of the coil may be the fluid space. The coiled pipe is a pipe which is roundabout for many times along the axial direction, and the circulation speed of fluid in the fluid space of the coiled pipe is high, so that the heat exchange efficiency in the system disclosed by the invention is improved. Preferably, the serpentine tubes are 10-20 rows of tubes.

According to the present disclosure, in a specific embodiment, two ends of the serpentine tube may be provided with valves for supplementing or discharging the fluid in the fluid space, and the valves may be in any form as long as the fluid can be supplemented or replaced in the system, for example, a three-way valve, and the valves in other forms are not described herein again.

According to the present disclosure, as shown in fig. 1, each heat dissipation assembly 4 may include a heat dissipation line 41 and fins 42 distributed along a length direction at a periphery of the heat dissipation line 41. Preferably, the radiating fins are fins, so that the contact area between the radiator and soil can be effectively increased, the thermal convection and the thermal radiation with the soil are enhanced, and the energy utilization efficiency and the heat exchange efficiency are improved.

According to the present disclosure, as shown in fig. 1, in order to achieve warming of soil layers with different depths, the number of the heat dissipation assemblies 4 may be 2-6 arranged from top to bottom, and the distance between adjacent heat dissipation assemblies may be 10-30 cm. The radiating assembly in the arrangement mode can enable heat transfer to be more uniform and sufficient, avoids the condition of overhigh local soil temperature and is favorable for maintaining the stability of the soil temperature.

In one embodiment, the heat dissipation pipeline 41 may be a steel pipe, a copper pipe or an aluminum pipe, and the heat dissipation fins 42 may be made of steel, copper or aluminum, which have good thermal conductivity and facilitate heat exchange between the fluid and the soil.

According to a specific embodiment of the present disclosure, the fluid in the system may be a gas or a liquid, the gas is air, and the liquid may be water or an antifreeze. The air has the advantages of low cost, quick temperature rise, simple maintenance and no blockage of a pipeline, but the specific heat capacity of the air is low, so that the problem of large temperature fluctuation exists, and when the air is adopted in low-temperature work, the air flow needs to be properly increased to compensate the temperature; the specific heat capacity of water and the antifreeze is high, the heat efficiency is high, the heat exchange is stable, and the temperature change is small. However, water has a risk of freezing at low temperature and is easy to block the pipeline. Preferably, anti-freezing fluid is used to improve the stability of the system operation and increase the heat exchange efficiency.

In one embodiment, the material of the heating element 2 may be any material with good thermal conductivity, preferably copper, aluminum or steel, so that the heat collected by the solar heat collecting element can be transferred to the heating element more easily.

According to the present disclosure, as shown in fig. 1, fluid communication between the first opening and the fluid circulation device 3, between the fluid circulation device 3 and the third opening, and between the second opening and the fourth opening may be by a pipeline; the pipeline can comprise a heat-insulating layer and a supporting layer from outside to inside, wherein the heat-insulating layer is made of rubber and plastic heat-insulating materials, and the supporting layer is made of copper, aluminum, steel or plastic materials. The arrangement of the heat insulation material reduces heat loss of pipelines exposed to air, and is beneficial to improving the energy utilization efficiency of the system.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A soil warming system, characterized in that it comprises a solar collector (1), a heating element (2) for absorbing heat from said solar collector (1), a fluid circulation device (3) and a plurality of hollow heat dissipating modules (4) for burying in soil; the heating element (2) is internally provided with a fluid space for fluid flowing, the fluid space is provided with a first opening and a second opening, each heat dissipation component (4) is provided with a third opening and a fourth opening, the first opening of the fluid space is communicated with the third openings of the heat dissipation components (4) through the fluid circulation device (3), and the second opening of the fluid space is communicated with the fourth openings of the heat dissipation components (4).

2. A system according to claim 1, characterized in that the system further comprises a first temperature sensor (5) for detecting the temperature of the heating element (2), a second temperature sensor (6) for detecting the temperature of the heat dissipating component (4), and a controller (7), the controller (7) being connected to the first temperature sensor (5), the second temperature sensor (6) and the fluid circulation device (3) for controlling the fluid circulation device (3) to stop operating when the difference between the temperature detected by the first temperature sensor (5) and the temperature detected by the second temperature sensor (6) is below a threshold value, and for controlling the fluid circulation device (3) to operate when the difference between the temperature detected by the first temperature sensor (5) and the temperature detected by the second temperature sensor (6) is above the threshold value.

3. A system according to claim 1, characterized in that the heating element (2) is a serpentine, the lumen of which is the fluid space.

4. A system according to claim 3, wherein both ends of the serpentine tube are provided with valves for replenishing or draining fluid in the fluid space.

5. The system according to claim 1, characterized in that each heat dissipating assembly (4) comprises a heat dissipating line (41) and fins (42) distributed lengthwise at the periphery of said heat dissipating line (41).

6. The system according to claim 1, characterized in that the number of heat dissipating components (4) is 2-6 arranged from top to bottom.

7. System according to claim 5, characterized in that the heat dissipation line (41) is a steel, copper or aluminium pipe and the material of the heat sink (42) is steel, copper or aluminium.

8. The system of claim 1, wherein the fluid in the system is a gas or a liquid, the gas is air, and the liquid is water or an antifreeze.

9. A system according to claim 1, characterized in that the material of the heating element (2) is copper, aluminum or steel.

10. The system according to claim 1, wherein the fluid communication between the first opening and the fluid circulation device (3), between the fluid circulation device (3) and the third opening and between the second opening and the fourth opening is by means of a pipeline;