Solar greenhouse heat storage system

Abstract

The utility model discloses a solar greenhouse heat storage system, which belongs to the field of indoor planting and comprises a concrete or masonry foundation, a greenhouse frame and a plastic film covered on the frame, the greenhouse frame comprises an arch-shaped framework arranged on a south wall, a plurality of mutually lapped heat insulation bags are arranged at the contact position of the plastic film and the ground, and the heat insulation bags are arranged on the arch-shaped framework. An underground heat exchange pipe is arranged underground the greenhouse, and each heat preservation bag is internally provided with a heat preservation medium and is connected with the underground heat exchange pipe through a circulating pipeline. According to the solar greenhouse, solar energy can be better utilized, besides the conventional cold air isolation function, the better heat storage function can be achieved in the daytime, the temperature of soil in the greenhouse is increased, and the requirement for normal growth of plants is met.

Description

Technical Field

[0001] This utility model belongs to the field of indoor planting, specifically relating to a solar greenhouse heat storage system. Background Technology

[0002] Solar greenhouses are important facilities for winter vegetable production in northern China, with their heat preservation and storage functions being particularly crucial. A typical greenhouse includes a concrete or brick foundation, a frame, and glass or plastic covering the frame. Generally, glass or plastic is installed on the south wall as a light-transmitting surface, and a rollable and unfoldable insulating blanket is also installed on the south wall. Figure 3 This is a side view of the greenhouse. The north wall includes columns and diagonal bracing above them, forming a concrete or brick foundation. The south wall includes an arched frame extending from the top of the bracing to the ground, forming the greenhouse frame, which is covered with glass or plastic. In winter, when outdoor air temperatures are low, insulation blankets are typically placed in the gaps between the plastic film and the walls and ground to prevent cold air from entering the greenhouse. However, these blankets only provide insulation and do not retain heat. Especially since the south wall is primarily made of plastic, it loses heat quickly when there is no sunlight. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a solar greenhouse heat storage system that can make better use of solar energy. In addition to the conventional function of isolating cold air, it can also play a better role in heat storage during the day, increase the soil temperature inside the greenhouse, and meet the normal growth needs of plants.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A solar greenhouse heat storage system includes a concrete or brick foundation, a greenhouse frame, and a plastic film covering the frame. The greenhouse frame includes an arched skeleton set on the south wall. Several overlapping heat-insulating bags are set at the contact points between the plastic film and the ground. A buried heat exchange pipe is installed underground in the greenhouse. Each heat-insulating bag contains a heat-insulating medium and is connected to the buried heat exchange pipe through a circulation pipe.

[0006] A further improvement of the present invention is that the arched frame includes several vertically arranged hollow and elastic pipes, and the horizontal and vertical pipes are connected to each other at the top and bottom of the arched frame. The arched frame and the buried heat exchange pipe are connected through a circulation pipe.

[0007] A further improvement of the present invention is that the circulation pipeline includes an inlet pipe and a return pipe, and a circulation pump and several valves are installed on the circulation pipeline.

[0008] A further improvement of this utility model is that each heat-insulating bag is connected to the inlet pipe and the return pipe, and several heat-insulating bags are laid horizontally along the length of the south wall at the contact position between the plastic film and the ground. The heat-insulating bags overlap each other, and the overlap length does not exceed 1 / 3 of the length of the heat-insulating bag.

[0009] A further improvement of this utility model is that: long strip-shaped heat-insulating bags are respectively arranged on the left and right sides of the south wall, arranged from top to bottom along the arc of the south wall, and the long strip-shaped heat-insulating bags are respectively connected to the inlet pipe and return pipe of the circulation pipe through branch pipes.

[0010] A further improvement of this utility model is that the heat-insulating bag and the arched frame are respectively connected to the inlet and outlet pipes of the circulation pipe through different branch pipes.

[0011] A further improvement of this utility model is that: the heat-insulating bag and the long strip heat-insulating bag are black, and the heat-insulating bag and the inside of the arched frame are filled with a heat-storing medium, which includes water.

[0012] A further improvement of this utility model is that the left and right sides of the elongated heat-insulating bag are fixed to the south wall.

[0013] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0014] This application optimizes the traditional insulation blanket by replacing it with an insulation bag, which is then connected to a buried heat exchange pipe installed under the greenhouse to circulate the heat storage medium. In addition to its original insulation function, it also has the function of heat storage, reducing greenhouse energy consumption and solving the problem that the temperature on the south side of the greenhouse is lower than other locations.

[0015] This application also optimizes the design of the greenhouse's arched frame by replacing it with a hollow and flexible pipe connected to the buried heat exchange pipe. The arched frame is filled with a heat storage medium, which makes full use of the frame's heat absorption characteristics and enhances the heat collection efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a solar greenhouse heat storage system according to this utility model;

[0018] Figure 2 yes Figure 1 Piping systems for thermal insulation bags and buried heat exchange pipes;

[0019] Figure 3 This is a side view of the greenhouse;

[0020] Figure 4 This is a schematic diagram of the solar greenhouse heat storage system in Example 3;

[0021] Among them, 1. Insulation bag, 2. Arched frame, 3. South wall, 4. Buried heat exchange pipe, 5. Circulation pump, 6. Valve, 7. Long strip insulation bag. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to embodiments:

[0023] Example 1

[0024] A solar greenhouse heat storage system includes a concrete or brick foundation, a greenhouse frame, and a plastic film covering the frame. The greenhouse frame includes an arched skeleton 2 set on the south wall 3. Several overlapping insulation bags 1 are placed at the contact points between the plastic film and the ground, i.e., several insulation bags 1 are used to cover the contact points between the plastic film and the ground at the corners of the south wall 3 to prevent air ingress. A buried heat exchange pipe 4 is installed underground in the greenhouse. Each insulation bag 1 contains an insulation medium and is connected to the buried heat exchange pipe 4 via a circulation pipe. The circulation pipe includes an inlet pipe and a return pipe, and a circulation pump 5 and several valves 6 are installed on the circulation pipe. Each insulation bag 1 is connected to both the inlet and return pipes. Several insulation bags 1 are laid horizontally along the length of the south wall 3 at the contact points between the plastic film and the ground, with the insulation bags 1 overlapping each other, the overlap length not exceeding 1 / 3 of the length of the insulation bag 1. The insulation bags 1 are connected to the inlet and return pipes of the circulation pipe via branch pipes.

[0025] like Figure 1 As shown, the arched frame 2 includes several vertical arched hollow tubes and several short tubes connecting the vertical arched hollow tubes. The bottom of the left and right sides of the arched frame 2 is provided with water outlets and water inlets, which are connected to the buried heat exchange pipe 4 through circulation pipes.

[0026] In one specific implementation, the two ends of the vertical arched hollow tube of the arched frame 2 are sealed, and interface pipes are opened at the upper and lower ends of the vertical arched hollow tube. Adjacent arched hollow tubes are connected by several short pipes, which can be made of polymer flexible tubing. The medium can flow inside the arched frame 2.

[0027] like Figure 2As shown, each heat-insulating bag 1 is equipped with a water inlet and a water outlet. All water inlets and outlets are connected to branch pipes, which in turn are connected to the water inlet and return pipes of the circulation pipe. The water inlet and return pipes of the circulation pipe are connected to the buried heat exchange pipe 4, thus forming a circulation loop. The heat-insulating bag 1 is black and is filled with a heat storage medium, which includes water.

[0028] During the day, the heat storage medium in the insulation bag 1 absorbs heat from sunlight and is heated. A circulation pump drives the heat storage medium in the pipeline to circulate between the buried heat exchange pipe 4 and the insulation bag 1, thus completing heat exchange. At night, taking advantage of the soil's good heat storage performance and slow heat release, the soil releases heat and transfers it into the insulation bag 1. The soil and insulation bag 1 release heat, better preventing cold air from entering the greenhouse through the gaps between the plastic film and the walls and ground.

[0029] Valves are installed on the pipes connecting the outlet and inlet of each insulation bag 1 to the branch pipes, so that the circulation and normal operation of other insulation bags 1 and buried heat exchange pipes 4 are not affected if one insulation bag 1 is damaged.

[0030] The buried heat exchange pipe 4 can be a floor heating coil.

[0031] Example 2

[0032] like Figure 1 As shown, this embodiment has the same structure as Embodiment 1, the only difference being that the arched frame 2 includes several vertically arranged hollow and elastic pipes, and the horizontal and vertical pipes of the arched frame 2 are connected. The arched frame 2 and the buried heat exchange pipe 4 are connected through a circulation pipe. The interior of the arched frame 2 is filled with a heat storage medium, which includes water. The insulation bag 1 and the arched frame 2 are respectively connected to the inlet and outlet pipes of the circulation pipe through different branch pipes.

[0033] This design also makes full use of the arched frame 2, which is modified to be filled with a heat storage medium and circulated through buried heat exchange pipes 4. During the day, the arched frame 2 absorbs solar energy to heat the heat storage medium, which is then transferred to the buried heat exchange pipes 4 via a circulating pump 5 to heat the soil. In the afternoon, as the temperature drops and the insulation on the south wall 3 is lowered, the heat storage material in the insulation bags 1 located at the contact points between the arched frame 2 and the plastic film and the ground heats the air inside the greenhouse. The heated soil also releases heat, ensuring the air temperature inside the greenhouse.

[0034] Example 3

[0035] like Figure 4As shown, the structure of this embodiment is the same as that of embodiment 2. The only difference is that in this embodiment, long strip-shaped heat-insulating bags 7 are arranged from top to bottom along the arc of the south wall 3 on the left and right sides of the south wall 3, and the left and right sides of the long strip-shaped heat-insulating bags 7 are fixed to the south wall 3.

[0036] The long, strip-shaped heat-insulating bag 7 is black. The heat-insulating bag 1 and the arched frame 2 are filled with a heat-storing medium, which includes water. The long, strip-shaped heat-insulating bag 7 is connected to the inlet and outlet pipes of the circulation pipe through branch pipes.

[0037] Normally, two insulated cups are placed on both sides of the south wall 3 of the greenhouse to prevent cold wind from entering. In this embodiment, the insulated cups are discarded and long strip-shaped insulated bags 7 are fixed on the left and right sides of the south wall 3. The long strip-shaped insulated bags 7 are filled with a medium and connected to the buried heat exchange pipes 4.

[0038] During the day, the long, rectangular heat-insulating bags 7 absorb solar energy to heat the heat storage medium. The heat storage medium is then transferred to the buried heat exchange pipes 4 via the circulating pump 5 to heat the soil. In the afternoon, as the temperature drops, the heat storage material inside the long, rectangular heat-insulating bags 7 on the south wall 3 heats the air inside the greenhouse and prevents cold winds from entering. The heated soil also releases heat, ensuring the air temperature inside the greenhouse.

Claims

1. A solar greenhouse heat storage system, comprising a concrete or brick foundation, a greenhouse frame, and a plastic film covering the frame, wherein the greenhouse frame includes an arched skeleton (2) set on the south wall (3), characterized in that: Several overlapping heat-insulating bags (1) are set at the contact position between the plastic film and the ground. A buried heat exchange pipe (4) is set in the underground of the greenhouse. Each heat-insulating bag (1) contains heat-insulating medium and is connected to the buried heat exchange pipe (4) through a circulation pipe. The arched frame (2) includes several vertically arranged hollow and elastic pipes, and the horizontal and vertical pipes of the arched frame (2) are connected to each other. The arched frame (2) and the buried heat exchange pipe (4) are connected through the circulation pipe.

2. The solar greenhouse heat storage system according to claim 1, characterized in that: The circulation pipeline includes an inlet pipe and a return pipe, and a circulation pump (5) and several valves (6) are installed on the circulation pipeline.

3. The solar greenhouse heat storage system according to claim 2, characterized in that: Each heat-insulating bag (1) is connected to the inlet pipe and the return pipe. Several heat-insulating bags (1) are laid horizontally along the length of the south wall (3) at the contact position between the plastic film and the ground. The heat-insulating bags (1) overlap each other, and the overlap length does not exceed 1 / 3 of the length of the heat-insulating bag (1).

4. A solar greenhouse heat storage system according to claim 2, characterized in that: On the left and right sides of the south wall (3), long strip-shaped heat-insulating bags (7) are arranged from top to bottom along the arc of the south wall (3), and the long strip-shaped heat-insulating bags (7) are connected to the inlet and outlet pipes of the circulation pipe through branch pipes.

5. A solar greenhouse heat storage system according to claim 3, characterized in that: The heat-insulating bag (1) and the arched frame (2) are respectively connected to the inlet and outlet pipes of the circulation pipe through different branch pipes.

6. A solar greenhouse heat storage system according to any one of claims 3 or 4, characterized in that: The heat-insulating bag (1) and the long strip heat-insulating bag (7) are black. The heat-insulating bag (1) and the arched frame (2) are filled with a heat-storing medium, which includes water.

7. A solar greenhouse heat storage system according to claim 4, characterized in that: The left and right sides of the long strip-shaped heat preservation bag (7) are fixed to the south wall (3).

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