CN110887272A - Greenhouse temperature adjusting system, method and system installation method - Google Patents

Abstract

The invention discloses a greenhouse temperature adjusting system, a greenhouse temperature adjusting method and a system installation method, wherein the greenhouse temperature adjusting system comprises: the system comprises a buried pipe, a ground source heat pump, a prefabricated radiation plate, a keel, a ground screw foundation, a water inlet main pipe and a water return main pipe; the keel is arranged in the interior and the underground of the greenhouse through a ground screw foundation, the prefabricated radiation plate is fixed to the keel, and the prefabricated radiation plate is communicated with the ground source heat pump; the buried pipe is arranged outside the greenhouse and buried underground; the buried pipe is communicated with the ground source heat pump; the ground source heat pump sends circulating water into the prefabricated radiation plate through the buried pipe and the water inlet main pipe so as to adjust the temperature of the greenhouse, and the preheating radiation plate is communicated with the buried pipe through the water return main pipe so as to form water circulation. The ground source heat pump improves the heat level of soil, and the temperature of the greenhouse is adjusted through the tail end of the prefabricated radiation plate. The temperature of the greenhouse is adjusted by using the annual temperature-stable deep soil as a cold and heat source.

Description

Greenhouse temperature adjusting system, method and system installation method

Technical Field

The invention belongs to the technical field of heating and refrigerating, and particularly relates to a greenhouse temperature adjusting system, a greenhouse temperature adjusting method and a system installation method.

Background

At present, agriculture is rapidly developed, and new states such as various soilless culture, agricultural experimental agricultural greenhouses, leisure sightseeing restaurants, ecological agricultural gardens and the like are developed, so that the requirements on production processes are more and more refined, efficient and economic, and higher requirements on thermal environment, energy conservation and environmental protection are provided for agricultural greenhouses and agricultural buildings.

The agricultural greenhouse thermal environment is mainly required to be heated, the current mainstream heat source side is a coal/gas hot water boiler, an electric heating or air source heat pump, the agricultural greenhouse is heated through a fan heater, radiating fins, ceiling radiation or the tail end of a wall surface vertical radiation plate, and the heat conversion efficiency and the heating effect on the agricultural greenhouse are obviously limited. Meanwhile, solar radiation is strong and the temperature is high in the southern agricultural greenhouse in summer, and the over-temperature phenomenon often occurs in the agricultural greenhouse, so that the crop production efficiency is negatively influenced. Therefore, the southern agricultural greenhouse has the requirements of heating in winter and cooling in summer.

Disclosure of Invention

According to the greenhouse temperature adjusting system, the greenhouse temperature adjusting method and the system installation method, circulating water is used as a cold and heat source to exchange heat with deep soil, and then the circulating water is input into the greenhouse to adjust the temperature of the greenhouse, so that the greenhouse temperature adjusting system has the advantages of being low in carbon, energy-saving, easy to install and the like.

The invention aims to provide a greenhouse temperature adjusting system, which comprises: the system comprises a buried pipe, a ground source heat pump, a prefabricated radiation plate, a keel, a ground screw foundation, a water inlet main pipe and a water return main pipe;

the keel is arranged in the interior and the underground of the greenhouse through a ground screw foundation, the prefabricated radiation plate is fixed to the keel, and the prefabricated radiation plate is communicated with the ground source heat pump; the buried pipe is arranged outside the greenhouse and buried underground; the buried pipe is communicated with the ground source heat pump;

the ground source heat pump sends circulating water into the prefabricated radiation plate through the buried pipe and the water inlet main pipe so as to adjust the temperature of the greenhouse, and the preheating radiation plate is communicated with the buried pipe through the water return main pipe so as to form water circulation.

According to the technical scheme, the characteristics of good soil heat insulation performance, stable deep soil temperature throughout the year, warm in winter and cool in summer are utilized. The ground source heat pump sends circulating water into the prefabricated radiation plate through the buried pipe, and the ground source heat pump improves heat energy of the hot grade circulating water of the soil and exchanges heat with the greenhouse through the prefabricated radiation plate, so that the temperature in the greenhouse is adjusted.

Further, still include: a fermentation tank or a methane tank which exchanges heat with the circulating water;

the water return main pipe comprises at least two branches communicated with the buried pipe, one branch passes through the fermentation tank or the methane tank, and a valve for changing the flow direction of circulating water is arranged on the water return main pipe so that the circulating water flows through or does not flow through the fermentation tank or the methane tank.

According to the technical scheme, the fermentation tank preheats water in the buried pipe, so that the utilization rate of resources and the heating efficiency of the system are improved. The prefabricated radiation plate is fixed through fossil fragments, prevents that soil from sinking and causing prefabricated radiation plate displacement.

Further, the prefabricated radiation plate includes: the heat-insulation building block comprises a concrete slab, a heat-insulation bottom plate, a heat-storage cover plate and a PE-RT pipe;

the concrete plate is arranged above the keel and connected with the keel; a groove is formed above the concrete slab; the heat-preservation bottom plate and the heat storage cover plate are stacked in the groove from bottom to top, and the PE-RT pipe is clamped between the heat-preservation bottom plate and the heat storage cover plate;

the water inlet main pipe and the water return main pipe are communicated with the PE-RT pipe.

According to the technical scheme, the circulating water of the buried pipe sequentially enters the water inlet main pipe, the prefabricated radiation plate in the greenhouse and the water return main pipe through the suction force provided by the ground source heat pump to form a cycle, and the temperature of the greenhouse is adjusted through the prefabricated radiation plate in the circulating process.

Specifically, a concave cavity for containing the PE-RT pipe is arranged on the upper surface of the heat preservation bottom plate.

Preferably, the greenhouse temperature adjusting system comprises a plurality of prefabricated radiation plates and a plurality of stop valves; the prefabricated radiation plates are connected in parallel into a circulating water path, and each parallel branch is provided with a stop valve.

This technical scheme realizes supplying water each branch road independent control through the stop valve. The user can conveniently open the stop valves according to the workload to adjust the temperature of the greenhouse.

Further, still include: further comprising: and the heat insulation plate is positioned outside the greenhouse along the line and vertically extends into the soil. The effect of heated board lies in reducing the temperature field of radiant panel and extends the temperature field diffusion of horizontal direction, reduces the waste of heat.

The invention also provides a greenhouse temperature adjusting method, the buried pipe is buried under the ground outside the greenhouse, the radiation plate is arranged under the ground of the greenhouse, the buried pipe is communicated with the radiation plate through the water inlet main pipe and the water return main pipe, circulating water is introduced into the buried pipe and the radiation plate, and the ground source heat pump provides power for the circulation of the circulating water.

Preferably, two branches for circulating water to enter the buried pipe are arranged, wherein one branch passes through the fermentation tank or the methane tank. And a valve for changing the flow direction of circulating water is arranged on the branch so that the circulating water can flow through or not flow through the fermentation tank or the methane tank.

Preferably, a plurality of radiation plates are connected in parallel to the circulation water path, and a shut-off valve is provided in the parallel branch.

The invention also discloses an installation method of the greenhouse temperature adjusting system, which is used for installing the greenhouse temperature adjusting system and comprises the following steps:

s100, arranging the keel in the interior and the underground of a greenhouse through the ground screw;

s200, installing a prefabricated radiation plate above the keel;

s300, burying a buried pipe underground to supply underground water, respectively communicating a water inlet main pipe and a water return main pipe with the buried pipe and the prefabricated radiation plate, and arranging the ground source heat pump on the water inlet main pipe and the water return main pipe.

The greenhouse temperature adjusting system, the greenhouse temperature adjusting method and the greenhouse temperature adjusting system installation method provided by the invention can bring at least one of the following beneficial effects:

1. the soil heat preservation performance is good, the deep soil temperature is stable throughout the year, the soil belongs to stable and reliable renewable energy sources, and the soil heat preservation system is suitable for cold and heat sources of agricultural greenhouses, does not need to supply heat through coal or electric heating, and has the advantages of low carbon, energy conservation and good heating effect; has the refrigeration effect;

2. the circulating water collected by the buried pipe is sent into the pipeline of the prefabricated radiation plate through the ground source heat pump, so that the effect of adjusting the temperature of the greenhouse can be met, and the greenhouse has the advantage of convenience in installation.

3. One branch of the return water main pipe is communicated with the ground source heat pump through the fermentation tank. Wherein the temperature in the fermentation vat is higher, and the fermentation vat preheats buried pipe water supply, not only improves the utilization ratio of resource, has improved heating capacity moreover. The fermentation tank can also be a methane tank.

Drawings

The above-mentioned characteristics, technical features, advantages and realisation of a greenhouse temperature regulation system will be further explained in a clearly understandable way below, with reference to the accompanying drawings, which illustrate preferred embodiments.

FIG. 1 is a schematic view showing the construction of a greenhouse temperature control system according to embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of a prefabricated radiation panel in example 1 of the present invention;

fig. 3 is a schematic view of the installation of a prefabricated radiation panel in embodiment 1 of the present invention;

FIG. 4 is a schematic structural diagram of a greenhouse temperature regulation system in embodiment 2 of the present invention.

The reference numbers illustrate:

1. a buried pipe; 2. a ground source heat pump; 3. prefabricating a radiation plate; 301. a keel; 302. a concrete slab; 303. PE-RT pipe; 304. a water inlet main pipe; 305. a water return main pipe; 306. a stop valve; 307. a heat preservation bottom plate; 308. a heat storage cover plate; 4. a fermentation tank; 5. a thermal insulation board; 6. and (4) a valve.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

The present invention provides an embodiment of a greenhouse temperature regulating system, as shown in fig. 1, comprising: the system comprises a buried pipe 1, a ground source heat pump 2 and a prefabricated radiation plate 3; the prefabricated radiation plate 3 is arranged on the shallow ground in the greenhouse, and the prefabricated radiation plate 3 is communicated with the ground source heat pump 2; the buried pipe 1 is arranged outside the greenhouse, and the buried pipe 1 is buried underground; circulating water in the buried pipe 1 enters the prefabricated radiation plates 3 under the pumping action of the ground source heat pump 2 to adjust the temperature of the greenhouse. Fossil fragments 301 are fixed through ground screw basis and shallow ground, and prefabricated radiant panel 3 is fixed on fossil fragments. Prevent that soil from sinking and causing prefabricated radiation plate displacement. The method is characterized in that a buried pipe is buried under the ground outside a greenhouse, a radiation plate is arranged under the ground of the greenhouse, the buried pipe is communicated with the radiation plate through a water inlet main pipe and a water return main pipe, circulating water is introduced into the buried pipe and the radiation plate, and a ground source heat pump provides power for circulation of the circulating water.

Because the soil heat preservation performance is good, the deep soil temperature is stable throughout the year, so the circulating water has the characteristics of being warm in winter and cool in summer. The ground source heat pump 2 sends circulating water into the prefabricated radiation plate 3 through the buried pipe 1, and heat energy of the circulating water exchanges heat with the temperature in the greenhouse through the prefabricated radiation plate 3, so that the temperature in the greenhouse is adjusted.

Specifically, as shown in fig. 2, the prefabricated radiation plate 3 includes: a concrete slab 302, a heat preservation bottom plate 307, a heat storage cover plate 308 and a PE-RT pipe 303; a concrete plate 302 is arranged above the keel 301 and connected with the keel 301; a groove is arranged above the concrete slab 302; the heat preservation bottom plate 307 and the heat storage cover plate 308 are stacked in the groove from bottom to top, and the PE-RT pipe 303 is clamped between the heat preservation bottom plate 307 and the heat storage cover plate 308; the water inlet main pipe and the water return main pipe are both communicated with the PE-RT pipe 303 so as to introduce or lead out circulating water into the prefabricated radiation plate 3. The upper surface of the insulating bottom plate 307 is provided with a cavity for accommodating the PE-RT tube 303. The reclaimed water of the buried pipe 1 sequentially enters the water inlet main pipe 304, the PE-RT pipe and the water return main pipe 305 through the ground source heat pump 2 to form a cycle, and the temperature of the greenhouse is regulated by the circulating water through the PE-RT pipe in the cycle process.

Further preferably, the greenhouse temperature adjusting system can comprise a plurality of prefabricated radiant panels 3 and a plurality of stop valves; the prefabricated radiation plates are connected in parallel into a circulating water path, and each parallel branch is provided with a stop valve 306. Independent control of each water supply branch is achieved by a shut-off valve 306. The user can open the stop valves 306 according to the workload to adjust the temperature of the greenhouse. In addition, when one PE-RT pipe is damaged, the independent maintenance can be realized, and the normal operation of other prefabricated radiant panels is not influenced. The PE-RT pipe is coiled between the heat preservation bottom plate and the heat storage cover plate.

Optionally, the keel is made of hard PP polypropylene plastic or light steel subjected to anticorrosion treatment, and has good bearing capacity, so that the prefabricated radiation plate is prevented from being displaced due to soil collapse. The concrete slab has good corrosion resistance, and prevents the prefabricated radiation plate from being corroded due to the contact of soil and the prefabricated radiation plate. The heat preservation bottom plate is preferably a heat preservation plate with low water absorption rate, such as an extruded sheet; the cover plate is made of a material with good heat storage performance and corrosion resistance, the outer surface of the prefabricated radiation plate is kept dry, the heat loss of the prefabricated radiation plate is reduced, and the heating and refrigerating efficiency of the prefabricated radiation plate is improved. The ground source heat pump 2 can be arranged inside the greenhouse and can also be arranged outside the greenhouse. In order to eliminate the heat and noise generated during the operation of the ground source heat pump 2, the ground source heat pump 2 is disposed inside the greenhouse in the present embodiment.

Example 2

On the basis of the embodiment 1, the invention provides a greenhouse temperature adjusting system, which further comprises a fermentation tank 4 for preheating circulating water. The return water main pipe is communicated to the buried pipe and comprises a first branch and a second branch, wherein the first branch is communicated with the ground source heat pump 2 through the fermentation tank 4, and the second branch is directly communicated with the ground source heat pump 2. And valves 6 are arranged on the first branch and the second branch. When the system refrigerates the greenhouse in summer: and closing the valve 6 on the first branch, opening the valve 6 on the second branch, and directly sending the circulating water to the prefabricated radiation plate by the ground source heat pump 2. When the system heats the greenhouse in winter: the valve 6 on the first branch is opened, the valve 6 on the second branch is closed, and the circulating water is preheated by the fermentation tank 4 before being sent to the prefabricated radiation plate by the ground source heat pump 2, so that the utilization rate of resources and the heating efficiency of the system are improved. The fermentation tank can also be changed into a methane tank.

As shown in fig. 4, further, the greenhouse temperature adjusting system further comprises: and the heat insulation plate 5 is positioned outside the greenhouse along the line and vertically extends into the soil. The thermal insulation board 5 has the effects of reducing the temperature field of the radiation board from diffusing along the temperature field in the horizontal direction and reducing heat waste.

The invention also discloses an embodiment of an installation method of the greenhouse temperature adjusting system, which comprises the following steps:

s100, arranging the keel in the interior and the underground of a greenhouse through the ground screw;

the keel is made of hard PP polypropylene plastic or light steel subjected to anticorrosive treatment, and has good bearing capacity. Its aim at supports prefabricated radiation plate, prevents that soil from sinking and causing prefabricated radiation plate displacement.

S200, installing a prefabricated radiation plate above the keel;

s300, burying a buried pipe underground to supply underground water, respectively communicating a water inlet main pipe and a water return main pipe with the buried pipe and the prefabricated radiation plate, and arranging the ground source heat pump on the water inlet main pipe and the water return main pipe. .

In detail, the method for installing the greenhouse temperature adjusting system comprises the steps of firstly arranging a plurality of ground screws on the ground and arranging keels on the ground screws; arranging the prefabricated radiation plate on the keel, wherein the prefabricated radiation plate is prefabricated and molded before installation and can be used after being directly installed on the keel; the prefabricated radiation plate is communicated with a ground edge heat pump through a water inlet main pipe and a water return main pipe; the buried pipe is buried underground, a first branch in the return water main pipe is communicated with the ground source heat pump through the fermentation tank, and a second branch in the buried pipe is directly communicated with the ground source heat pump. The installation of the system can be completed by implementing the steps S100, S200 and S300.

It is worth mentioning that the prefabricated radiation panels 3 can be installed in different positions according to different environments. For crops with developed root systems and crops needing frequent soil replacement and cultivation, the prefabricated radiation plate 3 is suitable for being laid on the lower part of soil where non-crops directly grow, such as ridges, personnel corridors and the like; for crops with simple root systems with shallow depth of penetration, the plants can be placed in the soil below the crop production area, so that the optimal heating/cooling effect is ensured. Soilless culture/leisure sightseeing dining room, etc.: can be directly placed in soil below a crop production area/a tourist activity area to perform central heating/cooling for a key thermal environment control area. The laying depth of the prefabricated radiation plate 3 is determined according to project climate and geological hydrology, and the traditional agricultural proposal is determined according to the depth of crop roots; other functional greenhouses suggest laying depths of 20mm to 50 mm.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A greenhouse temperature regulation system, comprising: the system comprises a buried pipe, a ground source heat pump, a prefabricated radiation plate, a keel, a ground screw foundation, a water inlet main pipe and a water return main pipe;

the keel is arranged in the interior and the underground of the greenhouse through a ground screw foundation, the prefabricated radiation plate is fixed to the keel, and the prefabricated radiation plate is communicated with the ground source heat pump; the buried pipe is arranged outside the greenhouse and buried underground; the buried pipe is communicated with the ground source heat pump;

the ground source heat pump sends circulating water into the prefabricated radiation plate through the buried pipe and the water inlet main pipe so as to adjust the temperature of the greenhouse, and the preheating radiation plate is communicated with the buried pipe through the water return main pipe so as to form water circulation.

2. The greenhouse temperature adjustment system of claim 1, further comprising: a fermentation tank or a methane tank which exchanges heat with the circulating water;

the water return main pipe comprises at least two branches communicated with the buried pipe, one branch passes through the fermentation tank or the methane tank, and a valve for changing the flow direction of circulating water is arranged on the water return main pipe so that the circulating water flows through or does not flow through the fermentation tank or the methane tank.

3. Greenhouse temperature regulation system according to claim 1, characterized in that the prefabricated radiant panels comprise: the heat-insulation building block comprises a concrete slab, a heat-insulation bottom plate, a heat-storage cover plate and a PE-RT pipe;

the concrete plate is arranged above the keel and connected with the keel; a groove is formed above the concrete slab; the heat-preservation bottom plate and the heat storage cover plate are stacked in the groove from bottom to top, and the PE-RT pipe is clamped between the heat-preservation bottom plate and the heat storage cover plate;

the water inlet main pipe and the water return main pipe are communicated with the PE-RT pipe.

4. The greenhouse temperature adjustment system of claim 3, wherein the upper surface of the thermal insulation base plate is provided with a cavity for receiving the PE-RT pipe.

5. A greenhouse temperature regulation system as claimed in claim 3, comprising a plurality of said prefabricated panels and a plurality of shut-off valves; the prefabricated radiation plates are connected in parallel into a circulating water path, and stop valves are arranged on the parallel branches.

6. A greenhouse temperature regulation system as claimed in claim 3, further comprising: and the heat insulation plate is positioned outside the greenhouse along the line and vertically extends into the soil.

7. A greenhouse temperature adjusting method is characterized in that a buried pipe is buried under the ground outside a greenhouse, a radiation plate is arranged under the ground of the greenhouse, the buried pipe is communicated with the radiation plate through a water inlet main pipe and a water return main pipe, circulating water is introduced into the buried pipe and the radiation plate, and a ground source heat pump provides power for circulation of the circulating water.

8. The method of claim 7, wherein two branches for circulating water to enter the buried pipe are provided, one branch passing through the fermentation tank or the biogas digester, and a valve for changing the flow direction of the circulating water is provided on the branch so that the circulating water may or may not flow through the fermentation tank or the biogas digester.

9. The greenhouse temperature adjusting method according to claim 7, wherein a plurality of radiation plates are connected in parallel to the circulation water path, and a shut-off valve is provided on the parallel branch.

10. A method of installing a greenhouse temperature regulation system for installing a greenhouse temperature regulation system according to any one of claims 3-6, comprising the steps of:

s100, arranging the keel in the interior and the underground of a greenhouse through the ground screw;

s200, installing a prefabricated radiation plate above the keel;

s300, burying a buried pipe underground to supply underground water, respectively communicating a water inlet main pipe and a water return main pipe with the buried pipe and the prefabricated radiation plate, and arranging the ground source heat pump on the water inlet main pipe and the water return main pipe.

Images