CN218442833U

CN218442833U - Solar heat storage device for greenhouse

Info

Publication number: CN218442833U
Application number: CN202221643675.4U
Authority: CN
Inventors: 王茂成; 王峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2023-02-03
Anticipated expiration: 2032-06-29

Abstract

The utility model belongs to the technical field of the agricultural production technique and specifically relates to a solar energy heat-retaining device for warmhouse booth. The temperature of the traditional greenhouse is mostly lack of heat storage means, and the greenhouse is difficult to keep the temperature for a long time. The technical proposal of the utility model comprises a heat preservation cabin embedded underground and underground, and a circulating heat storage system formed by connecting a sunshine type preheating cavity, a solar energy light-gathering heat collector, a heat storage device, a circulating pump and the like in series, and the heat storage device is arranged in the heat preservation cabin; water is used as a heat storage medium, the water is heated twice by the sunlight preheating cavity and the solar concentrating collector, the water is stored in the heat storage device for heat preservation, and heat is released to provide a heat source for the greenhouse after the greenhouse is cooled. The utility model is suitable for an agricultural production of warmhouse booth in low temperature season utilizes circulation heat-retaining system to absorb the heat and saves in the underground through the heat-retaining medium to can be for warmhouse booth heat supply for a long time.

Description

Solar heat storage device for greenhouse

Technical Field

The utility model belongs to the technical field of the agricultural production technique and specifically relates to a solar energy heat-retaining device for warmhouse booth.

Background

The greenhouse is an important facility in agricultural production, and most of the structures of the greenhouse are supported by a framework and covered by a plastic greenhouse film to form a heat-insulating space with better lighting, so that a proper environment temperature is provided for the growth of animals and plants in low-temperature seasons. The temperature inside the traditional greenhouse depends on solar irradiation and relative space sealing, namely the temperature in the greenhouse is closely related to sunlight, the greenhouse temperature is rapidly and greatly reduced due to insufficient sunlight, the constant maintenance is difficult, the growth of crops is extremely unfavorable, particularly, most of areas in the north of China are influenced by the climate in spring and winter, the problems of large day and night temperature difference, long sunlight time, difficult constant maintenance of the greenhouse temperature, low temperature of irrigation water and the like can be usually encountered, and the normal growth of the crops is seriously influenced; in the case of sudden changes of weather and other emergencies, the excessively low temperature of the greenhouse can even cause frost damage to crops, and huge economic loss is caused to farmers.

In order to solve the problems, growers in part of regions select to burn a furnace fire in the greenhouse to raise the temperature in the greenhouse, so that the planting cost is increased, great potential safety hazards exist, and meanwhile, certain influence is caused on the environment. In addition, farmers adopt solar power (heat) to combine with the greenhouse to heat in the greenhouse, but the problems of insufficient sunlight, low temperature and the like which affect the growth of crops cannot be thoroughly solved due to the lack of heat storage means, and the components such as a solar substrate and the like which are paved on the roof in a large area influence the lighting of the crops to a certain extent.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a solar energy heat-retaining device for warmhouse booth is applicable to warmhouse booth's agricultural production in low temperature season, utilizes circulation heat-retaining system to absorb the heat and save in the underground, treats that the canopy temperature decline back release heat provides the heat source for the big-arch shelter.

The technical proposal of the utility model comprises a sunshine type preheating cavity, a solar energy light-gathering heat collector, a heat preservation cabin, a heat storage device and a circulating pump;

the heat insulation bin is buried underground in the greenhouse, the heat reservoir is arranged in the heat insulation bin, and an interlayer between the outer wall of the heat reservoir and the inner wall of the heat insulation bin forms a heat storage cavity;

an air inlet and an air outlet are formed in the upper section or the top of the heat reservoir, and air doors are mounted at the air inlet and the air outlet;

the heat-insulating bin is provided with a heat-radiating port and an air-supplementing port which are both communicated with the greenhouse; the heat preservation cabin is provided with a fan and discharges heat to the greenhouse through the heat dissipation port;

the sunlight preheating cavity is a transparent water storage container and is arranged above the greenhouse shed;

the lower part of the solar heating cavity is connected with the upper part of the solar preheating cavity through a water ascending pipe, and the lower part of the solar preheating cavity is connected with the upper part of the heat reservoir through a water descending pipe; the circulating pump series connection on the upward water pipe, solar energy spotlight heat collector series connection on the downward water pipe, and install the water intaking valve on the downward water pipe between solar energy spotlight heat collector and heat reservoir.

Further, the wall of the heat preservation cabin sequentially consists of a waterproof layer, a heat insulation layer and a permeable heat storage layer from outside to inside.

Furthermore, the heat preservation cabin is at least provided with an inspection well.

Furthermore, a ventilation valve is arranged at an air supply opening and/or a heat dissipation opening of the heat preservation bin.

Furthermore, the sunlight preheating cavity structure is a strip cavity, a long groove or a water bag.

Furthermore, the sunshine type preheating cavity is connected with an external water supplementing mechanism, and a water draining opening is formed in the lower portion of the sunshine type preheating cavity.

Further, a liquid level limiting mechanism is arranged in the sunshine type preheating cavity.

Furthermore, a liquid level meter and a water temperature meter for monitoring the water storage capacity and the temperature are arranged in the heat reservoir.

Furthermore, the solar concentrating collector is arranged on the ground outside the greenhouse.

The utility model has the advantages that: the heat energy of solar radiation is utilized, water is used as a heat storage medium, and when the temperature is higher in the daytime, the heat storage medium is heated by a circulating heat storage system consisting of a sunlight type preheating cavity, a solar energy concentrating heat collector, a heat storage device and the like in turn and is stored underground for long-time heat preservation; after the water staying in the sunlight type preheating cavity is preheated by illumination, the water flows downwards to pass through the solar concentrating collector to be heated again, so that the heating efficiency is effectively improved; the high-temperature water flows into the heat reservoir to replace the low-temperature water in the heat reservoir, and then the high-temperature water is pumped into the sunshine type preheating cavity to enter the next heating cycle until the water temperature in the heat reservoir meets the requirement. After night or the temperature drops, the heat preservation cabin can be matched with the heat reservoir according to actual conditions, heat is gradually and slowly released into the greenhouse to maintain the temperature in the greenhouse, agricultural production is guaranteed, safety and energy conservation are achieved, and environmental protection is facilitated. Because the device heats circulating water in times, after the circulating heat exchange is stopped, the temperature of the water (preheating water) in the sunlight preheating cavity is approximately the same as that of a greenhouse, and the water can be directly used for irrigating crops or mixed with cold water, so that the problem of slow growth of the crops caused by cold water irrigation in low-temperature seasons is solved.

In addition, the sunlight type preheating cavity is made of transparent materials, and the solar concentrating heat collector can be flexibly arranged according to conditions (such as the ground between two large sheds), so that the influence of sunlight on the growth of crops is avoided.

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a side cross-sectional view of fig. 1.

Detailed Description

In the figure: the solar heat collecting system comprises a greenhouse 1, a 2-sunshine type preheating cavity, a 3-water supplementing mechanism, a 4-water draining port, a 5-heat radiator, a 6-water inlet valve, a 7-air supplementing port, an 8-solar light-gathering heat collector, a 9-heat reservoir, a 9 a-air inlet, a 9 b-air outlet, a 10-heat preserving bin, a 10 a-waterproof layer, a 10 b-heat insulating layer, a 10 c-permeable heat accumulating layer, an 11-circulating pump, a 12-inspection well and a 13-heat dissipating port.

Examples

The utility model discloses equipment, component and the material that the heat-retaining device used are the conventional product of market.

As can be seen from fig. 1 to 2, the technical solution of the present invention includes a sunshine type preheating chamber 2, a solar energy light-gathering heat collector 8, a heat preservation chamber 10, a heat reservoir 9, and a circulating pump 11;

the heat preservation bin 10 is buried below an underground freezing line of the greenhouse 1, the wall of the heat preservation bin 10 consists of three layers, namely a waterproof layer 10a, a heat insulation layer 10b and a permeable heat storage layer 10c from outside to inside; the waterproof layer 10a on the surface layer can effectively prevent the water in the soil from permeating inwards, the middle heat insulation layer 10b can be made of polyurethane or asbestos, the heat loss in the bin is prevented, and the inner permeable heat storage layer 10c is made of materials such as sand-free cement and the like, so that the functions of heat storage and support are achieved.

The heat reservoir 9 is arranged in the heat insulation bin 10, and a heat storage cavity is formed by an interlayer between the outer wall of the heat reservoir 9 and the permeable heat storage layer on the inner wall of the heat insulation bin 10.

The heat preservation bin 10 is provided with a heat dissipation port 13 and an air supply port 7 which are both communicated with the greenhouse 1; the air supplementing opening 7 and/or the heat dissipation opening 13 are/is provided with a ventilation valve; the heat preservation cabin is provided with at least one fan for pumping out heat in the cabin and conveying the heat to the greenhouse.

The sunshine type preheating cavity 2 is a transparent water storage cavity, and the sunshine type preheating cavity 2 is arranged above the greenhouse 1 and is fixedly connected with a support frame of the greenhouse. The water storage cavity is made of transparent materials (such as acrylic materials), so that the water storage cavity is prevented from shading sunlight. The sunshine type preheating cavity can be made into a strip-shaped tank body, a long groove body and other structures or a water bag according to actual requirements.

The lower section or the bottom of the heat reservoir 9 is connected with the upper section or the top of the sunshine type preheating cavity 2 through an ascending water pipe, and the lower section or the bottom of the sunshine type preheating cavity 2 is connected with the upper section or the top of the heat reservoir 9 through a descending water pipe; 11 series connection of circulating pump on the upward water pipe, 8 series connection of solar energy spotlight heat collector on the down water pipe, and install water intaking valve 6 on the down water pipe between solar energy spotlight heat collector 8 and heat reservoir 9, shine formula promptly and preheat chamber 2, solar energy spotlight heat collector 8, water intaking valve 6, heat reservoir 9, 11 series connection of circulating pump and form a circulation heat-retaining system.

In order to facilitate the operation and maintenance of underground equipment, the heat-insulating bin is provided with at least one inspection well. The both ends in this embodiment heat preservation storehouse respectively set up an inspection shaft 12, and the thermovent 13 in heat preservation storehouse is seted up at the ascending pipe side inspection shaft top to at thermovent 13 installation fan. A strip-shaped radiator can be arranged at a proper position in the greenhouse 1, the radiator is connected with the radiating port 13 through an air pipe, and the nozzle of the radiator is utilized to uniformly discharge heat into the greenhouse; an air supply port 7 is formed in the top of the inspection well on the side of the descending water pipe; the air supply opening 7 of the embodiment is provided with a ventilation valve, such as a butterfly baffle or a shutter and other one-way check valves, and the ventilation valve can be opened by a motor or manually.

An air inlet 9a and an air outlet 9b are formed in the upper section or the top of the heat reservoir 9, the air inlet 9a is located on the air supplementing side of the heat preservation bin 10, the air outlet 9b is located on the heat dissipation side of the heat preservation bin, air doors are mounted on the air inlet 9a and the air outlet 9b and can be controlled by a motor, and the air doors are closed and opened during heat dissipation in the heat storage state.

In the embodiment, the sunshine type preheating cavity 2 is connected with an external water supplementing mechanism 3, and a liquid level height limiting mechanism is arranged in the sunshine type preheating cavity 2, for example, a conventional water level meter is selected to be matched with an electromagnetic water valve of the water supplementing mechanism, or a float type water inlet valve is adopted to control the water quantity of the preheating cavity; the lower part of the sunshine type preheating cavity is provided with a water discharge opening 4.

Heat reservoir 9 in be equipped with level gauge and water thermometer for the water storage capacity and the temperature of monitoring heat reservoir, the condition of retaining in the suggestion heat reservoir at any time, also can be less than heat reservoir air intake 9a or air outlet 9b with level gauge and water thermometer and circulating pump 11, water intaking valve 6 connection coordination, control liquid level height, ensure that the inside upper segment of heat reservoir has sufficient air reserves.

The solar concentrating collector 8 is arranged on the ground outside the greenhouse, so that the solar concentrating collector can be prevented from occupying space in the greenhouse and can not shield sunlight. The solar light-focusing heat collector can adopt a groove-shaped paraboloid light-focusing heat-collecting device, a rotary paraboloid light-focusing heat-collecting device, a linear Fresnel reflection light-focusing heat-collecting device or a plane reflection central tower type light-focusing heat-collecting device, and can also combine a plurality of sets of heat-collecting devices to achieve better heating effect.

The device is used for heat storage and heat preservation of the greenhouse in low-temperature seasons, and elements such as a circulating pump, a water inlet valve, a fan and a ventilation valve of a heat preservation cabin, an air door of a heat reservoir and the like can be controlled to automatically coordinate through a conventional electric control system or a PLC (programmable logic controller) or manually operated.

When the sunshine is sufficient and the temperature is high at noon in the low-temperature season in daytime, the temperature of the water stored in the sunshine type preheating cavity 2 is increased after the sun is irradiated, or when the temperature of the water in the underground heat reservoir 9 is monitored to be low in the period, the circulating pump 11 is started, and the low-temperature water in the heat reservoir 9 is pumped to the sunshine type preheating cavity 2 along the ascending water pipe; meanwhile, the water inlet valve 6 is opened, warm water which is preheated primarily in the sunshine type preheating cavity flows out along the down water pipe, is heated again when flowing through the solar concentrating heat collector 8, and finally enters the heat reservoir 9. And repeating the circulation, stopping the circulating pump 11 after the water temperature in the heat reservoir 9 is integrally raised, closing the water inlet valve 6, and storing the high-temperature water in the heat reservoir for heat preservation. At this time, the air doors of the air inlet and outlet of the heat reservoir 9, the heat dissipation port and/or the air supply port of the heat preservation bin 10 and the like are all in a closed state. The heat radiated by the heat reservoir or the excess heat is stored in the heat storage cavity (the interlayer between the heat reservoir and the heat preservation cabin 10) and the permeable heat storage layer.

And (3) at night or when the temperature of the greenhouse is reduced due to weather change, opening a fan of the heat preservation cabin, a ventilation valve of the heat dissipation port and/or the air supplement port, and sending hot air in the heat storage cavity into the greenhouse through the radiator 5. After the temperature in the heat storage cavity gradually becomes cold or further drops, air doors of an air inlet and an air outlet of the heat storage device are opened, and the air flow drives the heat in the heat storage device to be sent into the greenhouse through the heat storage cavity and the radiator. Because the underground temperature is higher than the overground temperature, the temperature in the heat storage cavity and the heat reservoir is slowly reduced, and heat can be provided for the greenhouse for a long time and the temperature of the greenhouse can be maintained. And after the air temperature is warmed up again in the daytime, the circulating heat storage system is started again to absorb heat and store energy.

In addition, another advantage of this device is that the moisture in the circulation heat-retaining system heats twice, after the heat reservoir temperature satisfied the requirement, can stop the circulation heat transfer, and the temperature that stays in the preheating intracavity of sunshine formula preheats the temperature relative lowly, can directly or with cold water mixture be used for crops watering, the effectual problem of cold water irrigation influence crops growth in low temperature season of having solved.

The foregoing detailed description of the embodiments of the invention with reference to preferred embodiments is illustrative rather than limiting in form. After reading the description of the present invention, those skilled in the art may modify the technical solutions described in the embodiments or make equivalent substitutions for some technical features, and these modifications or substitutions do not depart from the essence of the corresponding technical solutions in the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a solar energy heat-retaining device for warmhouse booth which characterized in that: comprises a sunshine type preheating cavity (2), a solar energy light-gathering heat collector (8), a heat preservation bin (10), a heat storage device (9) and a circulating pump (11);

the heat insulation bin (10) is buried underground in the greenhouse (1), the heat reservoir (9) is arranged in the heat insulation bin (10), and an interlayer between the outer wall of the heat reservoir (9) and the inner wall of the heat insulation bin (10) forms a heat storage cavity;

an air inlet (9 a) and an air outlet (9 b) are formed in the upper section or the top of the heat reservoir (9), and air doors are mounted on the air inlet (9 a) and the air outlet (9 b);

the heat preservation bin (10) is provided with a heat dissipation port (13) and an air supply port (7), and the heat dissipation port (13) and the air supply port (7) are communicated with the greenhouse (1); the heat preservation bin (10) is provided with a fan and discharges heat to the greenhouse through a heat dissipation port;

the sunshine type preheating cavity (2) is a transparent water storage container and is arranged above the greenhouse (1);

the lower part of the solar heating type preheating cavity (2) is connected with the upper part of the solar heating type preheating cavity (2) through an ascending water pipe, and the lower part of the solar heating type preheating cavity (2) is connected with the upper part of the heat reservoir (9) through a descending water pipe; circulating pump (11) series connection on the water pipe that goes upward, solar energy spotlight heat collector (8) series connection on the water pipe that goes downward, and install water intaking valve (6) on the water pipe that goes downward between solar energy spotlight heat collector (8) and heat reservoir (9).

2. The solar heat storage device for the greenhouse as claimed in claim 1, wherein: the wall of the heat preservation bin (10) is composed of a waterproof layer (10 a), a heat insulation layer (10 b) and a permeable heat storage layer (10 c) from outside to inside in sequence.

3. The solar heat storage device for the greenhouse as claimed in claim 1, wherein: the heat preservation bin (10) is at least provided with an inspection well (12).

4. The solar heat storage device for the greenhouse as claimed in claim 1, wherein: and ventilation valves are arranged on the air supply opening (7) and/or the heat dissipation opening (13) of the heat preservation bin (10).

5. The solar heat storage device for the greenhouse as claimed in claim 1, wherein: the sunshine type preheating cavity (2) is in a strip-shaped cavity, a long groove body or a water bag.

6. The solar heat storage device for the greenhouse as claimed in claim 1, wherein: the sunshine type preheating cavity (2) is connected with an external water supplementing mechanism (3), and a water draining opening (4) is formed in the lower portion of the sunshine type preheating cavity.

7. The solar heat storage device for the greenhouse as claimed in claim 6, wherein: and a liquid level height limiting mechanism is arranged in the sunshine type preheating cavity (2).

8. The solar heat storage device for the greenhouse as claimed in claim 1, wherein: a liquid level meter and a water temperature meter for monitoring the water storage capacity and the temperature are arranged in the heat reservoir (9).

9. A solar thermal storage apparatus for greenhouses according to any one of claims 1 to 8, wherein: the solar energy light-gathering heat collector (8) is arranged on the ground outside the greenhouse (1).