Greenhouse cooling device based on carbon dioxide phase change refrigeration

Abstract

The utility model provides a greenhouse cooling device based on carbon dioxide phase change refrigeration, and relates to the technical field of greenhouse equipment. The system comprises an air supply system and a cold supply system, wherein the air supply system comprises a carbon dioxide storage tank, an air temperature gasifier and an air supply mechanism arranged in a greenhouse; the cold supply system comprises a heat exchange mechanism, a reservoir and a temperature adjusting mechanism arranged in the greenhouse, the heat exchange mechanism comprises a heat exchanger arranged on one side of the air temperature vaporizer and a fan, the fan is used for forming air flowing from one side of the air temperature vaporizer to one side of the heat exchanger, and a first pump body and a second pump body are arranged in the reservoir; the first pump body is used for forming circular flow of water between the reservoir and the heat exchanger; and the second pump body is used for forming circulating flow of water between the reservoir and the temperature adjusting mechanism. The greenhouse cooling device for carbon dioxide phase change refrigeration can store cooling capacity generated when carbon dioxide is vaporized and is used for reducing the temperature of a greenhouse.

Description

Technical Field

[0001] The utility model relates to the technical field of greenhouse equipment, and in particular to a greenhouse cooling device based on carbon dioxide phase change refrigeration. Background Art

[0002] CO2 (carbon dioxide) is the carbon source for plant photosynthesis, significantly impacting the photosynthetic rate and, in turn, plant growth, quality, and yield. Currently, large-scale greenhouse fruit and vegetable production often utilizes a centralized liquid CO2 supply system. The supply process primarily involves converting liquid CO2 into gas through vaporization equipment, followed by reheating and pressure regulation, and distribution to the greenhouse's gas pipelines.

[0003] Common vaporizers are mostly air-temperature type. Liquid CO2 evaporates rapidly during the vaporization process, removing a large amount of heat and lowering the air temperature. However, this cooling capacity is often overlooked. Existing centralized gas supply systems primarily focus on improving the heat transfer efficiency of vaporizers, but fail to capture and utilize the cooling capacity generated by CO2 vaporization. Utility Model Content

[0004] To this end, the present invention proposes a greenhouse cooling device based on carbon dioxide phase change refrigeration to at least partially solve the technical problem that the cold energy generated by the existing CO2 vaporization is not collected and utilized.

[0005] The technical solution of the utility model is as follows:

[0006] A greenhouse cooling device based on carbon dioxide phase change refrigeration, comprising an air supply system and a cooling system; the air supply system comprises a carbon dioxide storage tank, an air-temperature vaporizer and an air supply mechanism arranged in the greenhouse, the output end of the carbon dioxide storage tank is connected to the input end of the air-temperature vaporizer, and the output end of the air-temperature vaporizer is connected to the input end of the air supply mechanism; the cooling system comprises a heat exchange mechanism, a water reservoir and a temperature control mechanism arranged in the greenhouse, the heat exchange mechanism comprises a heat exchanger and a fan arranged on one side of the air-temperature vaporizer, the fan is used to cause air to flow from one side of the air-temperature vaporizer to one side of the heat exchanger, a first pump body and a second pump body are provided in the water reservoir, the first pump body is used to cause water to circulate between the water reservoir and the heat exchanger; the second pump body is used to cause water to circulate between the water reservoir and the temperature control mechanism.

[0007] Furthermore, the heat exchange mechanism also includes a mounting base, a gas channel is constructed in the mounting base, a plurality of heat exchangers are arranged in the gas channel, and each heat exchanger is arranged at intervals along the length direction of the gas channel, and the fan is an exhaust fan arranged at one end of the gas channel away from the air temperature vaporizer.

[0008] Furthermore, the heat exchanger includes a first water tank and a second water tank spaced apart in an upper and lower direction, and a plurality of pipes for connecting the first water tank and the second water tank are provided between the first water tank and the second water tank. Each of the pipes is in the shape of a rectangular parallelepiped and spaced apart along the length direction of the first water tank.

[0009] Furthermore, fins are connected between two adjacent tubes, and each fin extends in a wave shape along the length direction of the tube.

[0010] Furthermore, the first water tanks are connected in series, and the second water tanks are connected in series; one of the first water tanks is connected to the water reservoir through a first pipeline, and one of the second water tanks is connected to the water reservoir through a second pipeline.

[0011] Furthermore, the mounting base includes a base frame and a mounting chamber provided on the base frame, the mounting chamber includes four plates connected end to end and surrounding the gas channel, and the outer side walls of the four plates are coated with an insulation layer.

[0012] The working principle and beneficial effects of the utility model are as follows:

[0013] The utility model provides a greenhouse cooling device based on carbon dioxide phase change refrigeration, which is provided by arranging a heat exchanger and a fan on one side of an air-temperature vaporizer. The fan drives the air to flow from the side of the air-temperature vaporizer to the side of the heat exchanger. On the one hand, it can increase the air flow on the side of the air-temperature vaporizer and improve the vaporization efficiency of the air-temperature vaporizer; on the other hand, the heat exchanger can absorb the cold energy generated by the vaporization of CO2, which can be stored in a water tank in the form of cold water, and the temperature of the greenhouse can be lowered by transporting the cold water to the greenhouse. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 A schematic diagram of the connection of a greenhouse cooling device based on carbon dioxide phase change refrigeration provided in an embodiment of the present invention;

[0016] Figure 2 A three-dimensional diagram of the air-temperature vaporizer and the heat exchange mechanism provided in an embodiment of the present utility model;

[0017] Figure 3 An exploded view of the air-temperature vaporizer and the heat exchange mechanism provided in an embodiment of the present utility model;

[0018] Figure 4 A front view of a heat exchanger provided in an embodiment of the present utility model;

[0019] Figure 5 for Figure 4 A partial enlarged view of point A in the middle.

[0020] In the figure: 100, carbon dioxide storage tank; 200, air-temperature vaporizer; 300, gas supply mechanism; 400, heat exchange mechanism; 410, heat exchanger; 411, first water tank, 412, second water tank; 413, pipe body; 414, fin; 420, fan; 430, mounting base; 431, plate body; 401, gas channel; 500, water reservoir; 600, greenhouse; 710, first pipeline; 720, second pipeline. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] This embodiment provides a greenhouse cooling device based on carbon dioxide phase change refrigeration, referring to Figure 1 As shown, it includes an air supply system and a cooling system. The air supply system includes a carbon dioxide storage tank 100, an air-temperature vaporizer 200, and an air supply mechanism 300 located in a greenhouse 600. The output end of the carbon dioxide storage tank 100 is connected to the input end of the air-temperature vaporizer 200, and the output end of the air-temperature vaporizer 200 is connected to the input end of the air supply mechanism 300. The cooling system includes a heat exchange mechanism 400, a water reservoir 500, and a temperature control mechanism located in the greenhouse 600. The heat exchange mechanism 400 includes a heat exchanger 410 and a fan 420 located on one side of the air-temperature vaporizer 200. The fan 420 is used to create a flow of air from the air-temperature vaporizer 200 to the heat exchanger 410. The water reservoir 500 is provided with a first pump body and a second pump body. The first pump body is used to create a circulation flow of water between the water reservoir 500 and the heat exchanger 410; the second pump body is used to create a circulation flow of water between the water reservoir 500 and the temperature control mechanism.

[0023] In this embodiment, the carbon dioxide storage tank 100 is used to store liquid carbon dioxide. When carbon dioxide needs to be replenished in the greenhouse 600, the liquid carbon dioxide stored in the carbon dioxide storage tank 100 can be vaporized by the air-temperature vaporizer 200 and then transported to the gas supply mechanism 300 in the greenhouse 600, thereby replenishing carbon dioxide in the greenhouse 600. When the liquid carbon dioxide vaporizes in the air-temperature vaporizer 200, it absorbs heat and lowers the temperature of the air at the air-temperature vaporizer 200. It should be noted that the carbon dioxide storage tank 100, the air-temperature vaporizer 200, and the gas supply mechanism 300 in the greenhouse 600 can all be referred to in the prior art and will not be described in detail here.

[0024] In this embodiment, the first pump drives water to circulate between the water reservoir 500 and the heat exchanger 410, and the fan 420 forces low-temperature air from the air-temperature vaporizer 200 to flow toward the heat exchanger 410. As the low-temperature air passes through the heat exchanger 410, it exchanges heat with the water within the heat exchanger 410, lowering the water temperature. The cooled water can then be stored in the water reservoir 500. When the temperature of the greenhouse 600 needs to be lowered, the second pump drives water to circulate between the water reservoir 500 and the temperature control mechanism within the greenhouse 600, allowing the low-temperature water to exchange heat with the high-temperature air within the greenhouse 600, thereby lowering the temperature within the greenhouse 600.

[0025] In general, the aforementioned fan 420, heat exchanger 410, and water reservoir 500 are provided. On the one hand, fan 420 forces low-temperature air from the air-temperature vaporizer 200 to flow toward the heat exchanger 410, thereby raising the air temperature at the air-temperature vaporizer 200 and improving the vaporization efficiency of the air-temperature vaporizer 200. On the other hand, the low-temperature air lowers the water temperature within the heat exchanger 410 and water reservoir 500. The lowered water can be stored in the water reservoir 500 and used to lower the temperature of the greenhouse 600 when needed. Compared to other cooling methods, this embodiment has lower energy consumption.

[0026] For specific structure, refer to Figure 2 and Figure 3 As shown, the heat exchange mechanism 400 of this embodiment further includes a mounting base 430, a gas channel 401 is constructed in the mounting base 430, a plurality of heat exchangers 410 are arranged in the gas channel 401, and each heat exchanger 410 is arranged at intervals along the length direction of the gas channel 401, and the fan 420 is an exhaust fan 420 arranged at one end of the gas channel 401 away from the air temperature vaporizer 200.

[0027] In this embodiment, by setting the above-mentioned gas channel 401 and exhaust fan 420, and setting each heat exchanger 410 in the gas channel 401, low-temperature air can flow in the gas channel 401, so that the low-temperature air is in full contact with each heat exchanger 410 in the gas channel 401, thereby improving the utilization rate of the cold capacity contained in the low-temperature air.

[0028] In some embodiments, a blower 420 may be provided on one side of the air-temperature vaporizer 200, and a heat exchanger 410 may be provided on the other opposite side of the air-temperature vaporizer 200. However, in this solution, since the blower 420 and the heat exchanger 410 are separate, they are inconvenient to install and use.

[0029] refer to Figure 4 and Figure 5As shown, the heat exchanger 410 of this embodiment includes a first water tank 411 and a second water tank 412 spaced apart in an upper and lower direction. A plurality of pipe bodies 413 for connecting the first water tank 411 and the second water tank 412 are provided between the first water tank 411 and the second water tank 412. Each pipe body 413 is in the shape of a rectangular parallelepiped and spaced apart along the length direction of the first water tank 411.

[0030] In this embodiment, by setting up the heat exchanger 410 of the above structure, after entering the first water tank 411, the water can fall into the second water tank 412 through the tubes 413. In the process of the water falling, it can better exchange heat with the low-temperature air flowing through, thereby improving the utilization rate of the cooling capacity.

[0031] In this embodiment, reference Figure 5 As shown, a fin 414 is connected between two adjacent tubes 413 , and each fin 414 extends in a wave shape along the length direction of the tube 413 .

[0032] In this embodiment, by providing the above-mentioned fins 414, the contact area between the heat exchanger 410 and the low-temperature air can be increased, thereby further improving the utilization rate of the cooling capacity.

[0033] refer to Figure 3 As shown, in this embodiment, the first water tanks 411 are connected in series, and the second water tanks 412 are connected in series; one of the first water tanks 411 is connected to the water reservoir 500 through the first pipe 710, and one of the second water tanks 412 is connected to the water reservoir 500 through the second pipe 720.

[0034] Compared to providing a first water pump for each heat exchanger 410, this embodiment connects the first water tanks 411 and the second water tanks 412 in series, allowing water to circulate through each heat exchanger 410 using only a single first water pump, resulting in a simpler structure. It should be noted that the first water pump also utilizes an existing product; however, as this does not affect understanding, its accompanying drawings are not shown in this embodiment.

[0035] In this embodiment, the mounting base 430 includes a base frame and a mounting chamber provided on the base frame. The mounting chamber includes four plates 431 connected end to end to form a gas channel 401 . The outer walls of the four plates 431 are covered with an insulation layer.

[0036] In this embodiment, by providing the aforementioned installation chamber and coating the outer side of the installation chamber with an insulation layer, the cooling loss within the gas channel 401 can be reduced, that is, the cooling utilization rate can be further improved. It should be noted that the insulation layer is not shown in the drawings of this embodiment because it does not affect understanding.

[0037] In this embodiment, the water reservoir 500 can be an existing insulated water tank, and its structure and working principle are not described in detail here. The aforementioned temperature control mechanism can be an existing floor heating pipe system or a rear wall water bag system, wherein the floor heating pipe system or the rear wall water bag system can also refer to the existing technology and are not described in detail here.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A greenhouse cooling device based on carbon dioxide phase change refrigeration, characterized by: The invention comprises an air supply system and a cooling system; the air supply system comprises a carbon dioxide storage tank (100), an air temperature vaporizer (200) and an air supply mechanism (300) arranged in a greenhouse (600); the output end of the carbon dioxide storage tank (100) is connected to the input end of the air temperature vaporizer (200), and the output end of the air temperature vaporizer (200) is connected to the input end of the air supply mechanism (300); the cooling system comprises a heat exchange mechanism (400), a water reservoir (500) and a temperature regulating mechanism arranged in the greenhouse (600); The heat exchange mechanism (400) includes a heat exchanger (410) and a fan provided on one side of the air-temperature vaporizer (200), wherein the fan is used to cause air to flow from one side of the air-temperature vaporizer (200) to one side of the heat exchanger (410). A first pump body and a second pump body are provided in the water reservoir (500), wherein the first pump body is used to cause water to circulate between the water reservoir (500) and the heat exchanger (410); and the second pump body is used to cause water to circulate between the water reservoir (500) and the temperature regulating mechanism.

2. The greenhouse cooling device based on carbon dioxide phase change refrigeration according to claim 1 is characterized in that: The heat exchange mechanism (400) further includes a mounting base (430), a gas channel (401) being constructed in the mounting base (430), a plurality of heat exchangers (410) being arranged in the gas channel (401), and each of the heat exchangers (410) being arranged at intervals along the length direction of the gas channel (401), and the fan being an exhaust fan arranged at one end of the gas channel (401) away from the air-temperature vaporizer (200).

3. The greenhouse cooling device based on carbon dioxide phase change refrigeration according to claim 2 is characterized in that: The heat exchanger (410) comprises a first water tank (411) and a second water tank (412) which are spaced apart from each other. A plurality of pipes are provided between the first water tank (411) and the second water tank (412) for connecting the first water tank (411) and the second water tank (412). Each of the pipes is in the shape of a rectangular parallelepiped and is spaced apart along the length direction of the first water tank (411).

4. The greenhouse cooling device based on carbon dioxide phase change refrigeration according to claim 3 is characterized in that: Fins are connected between two adjacent tubes, and each fin extends in a wave shape along the length direction of the tube.

5. The greenhouse cooling device based on carbon dioxide phase change refrigeration according to claim 3 is characterized in that: The first water tanks (411) are connected in series, and the second water tanks (412) are connected in series; one of the first water tanks (411) is connected to the water reservoir (500) via a first pipe (710), and one of the second water tanks (412) is connected to the water reservoir (500) via a second pipe (720).

6. The greenhouse cooling device based on carbon dioxide phase change refrigeration according to claim 2 is characterized in that: The mounting seat (430) comprises a base frame and a mounting chamber provided on the base frame, the mounting chamber comprising four plates (431) connected end to end and surrounding the gas channel (401), and the outer side walls of the four plates are coated with a thermal insulation layer.

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