Air path circulating system of double-evaporator low-temperature incubator for stress test

Abstract

The utility model discloses an air path circulating system of a double-evaporator low-temperature incubator for an adverse situation test, which comprises a box body, a refrigerating system consisting of evaporators and a circulating fan is arranged in the box body, and an air duct is formed between the refrigerating system and the box body; two groups of refrigerating systems, namely a first refrigerating circulating system and a second refrigerating circulating system, which are independently distributed up and down are arranged in the box body, the two groups of refrigerating systems alternately operate, and two independent air ducts, namely a first air duct and a second air duct, are respectively formed in the box body; a one-way flow baffle is hinged to one side of an outlet of the second air channel, a limiting plate is arranged at the outlet of the second air channel, and the free end of the one-way flow baffle makes movable contact with the limiting plate or the inner wall of the box body, so that two sets of independent air paths are formed in the box body. The utility model belongs to the technical field of low-temperature incubators, and particularly aims to solve the problems of load of continuous operation of a single refrigerating system in the prior art and influence on heat exchange effect caused by easy frosting of an evaporator in a refrigerating process.

Description

Technical Field

[0001] This utility model belongs to the field of low temperature incubator technology, specifically referring to the air circulation system of a dual evaporator low temperature incubator for stress testing. Background Technology

[0002] The existing plant incubators mainly operate within a temperature range of 20℃-40℃, primarily used for plant cultivation, accelerating plant growth, shortening the cultivation cycle, and for researching scientific issues such as transgenics.

[0003] While some existing plant incubators offer low-temperature options, their lowest temperature is around -5℃, which is insufficient for research requiring deep cryogenic stress environments. Furthermore, when the incubator temperature remains below 0℃ for extended periods, the temperature near the evaporator must be lower than the internal temperature to maintain stability. Prolonged exposure to this low temperature environment can lead to frost formation on the evaporator surface, severely impacting heat exchange efficiency. Single refrigeration systems often require continuous operation for extended periods, potentially causing overuse and component aging. Additionally, the limited space within the incubator presents significant challenges for system layout and airflow design. Utility Model Content

[0004] The technical problem this invention aims to solve is the load of a single refrigeration system operating continuously in the prior art, and the problem that the evaporator is prone to frosting during the refrigeration process, which affects the heat exchange effect.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] The air circulation system of the dual evaporator low-temperature incubator for stress testing proposed in this utility model includes a chamber, in which a refrigeration system consisting of an evaporator and a circulating fan is provided, as well as a control system for controlling the operation of the refrigeration system. The refrigeration system and the chamber form an air duct.

[0007] The refrigeration system is set up in two independent sets distributed vertically within the box, namely the first refrigeration cycle system and the second refrigeration cycle system. The control system controls the two sets of refrigeration systems to operate alternately and form two independent air ducts within the box, namely the first air duct and the second air duct. The first air duct and the second air duct are respectively provided with inlets and outlets to guide the flow of air.

[0008] A one-way baffle is hinged to one side of the outlet of the second air duct, and a limiting plate is provided at the outlet of the second air duct. The free end of the one-way baffle is in contact with the limiting plate or the inner wall of the box, so that the box forms two independent air paths.

[0009] Preferably, when the first refrigeration cycle system is running, the free end of the one-way baffle plate, under the action of gravity and the wind force generated by the first air duct, comes into contact with the limiting plate and isolates the second air duct, preventing cold air from entering the second air duct; when the second refrigeration cycle system is running, the free end of the one-way baffle plate moves towards the inner wall of the box under the action of the wind force generated by the second air duct, and when it contacts the inner wall of the box, it isolates the outlet of the second air duct from the first air duct, preventing cold air from entering the first air duct.

[0010] Preferably, the first refrigeration cycle system includes a first evaporator and a first circulating fan, the second refrigeration cycle system includes a second evaporator and a second circulating fan, the first circulating fan is located above the second circulating fan, the first circulating fan and the second circulating fan are located on the inlet side of the air duct, and the first evaporator and the second evaporator are located on the outlet side of the air duct.

[0011] Preferably, both the first circulating fan and the second circulating fan are inclined downwards about the horizontal plane.

[0012] The beneficial effects of this utility model by adopting the above structure are as follows:

[0013] 1. This application adopts a dual refrigeration system to improve the cultivation effect, reduce energy consumption and extend service life, and solves the technical problem that a single refrigeration system is difficult to operate stably under extreme temperature conditions.

[0014] 2. This application arranges the two sets of refrigeration systems in layers, and by adding a one-way baffle, it solves the problem of cold air flowing into other parts outside the air duct during the circulation process. At the same time, the one-way baffle can prevent cold air from entering the evaporator during defrosting, improve defrosting efficiency, and provide a solid foundation for the long-term operation of the incubator in a low-temperature environment. Attached Figure Description

[0015] Figure 1 A cross-sectional view of the internal structure of the air circulation system of a dual-evaporator low-temperature incubator for stress testing provided in this application;

[0016] Figure 2 This is a schematic diagram of the circulating air path of the first refrigeration cycle system;

[0017] Figure 3 This is a schematic diagram of the circulation air path of the second refrigeration cycle system.

[0018] Among them, 1. First evaporator, 2. Second evaporator, 3. First circulating fan, 4. Second circulating fan, and 5. One-way baffle.

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Example 1

[0023] like Figure 1 As shown, the present invention proposes an air circulation system for a dual-evaporator low-temperature incubator for stress testing, comprising a chamber, wherein the chamber is equipped with a refrigeration system consisting of an evaporator and a circulating fan, and a control system for controlling the operation of the refrigeration system, wherein the refrigeration system and the chamber form an air duct.

[0024] The refrigeration system is provided in two independently distributed sets inside the box, namely the first refrigeration cycle system and the second refrigeration cycle system. The two sets of refrigeration systems operate alternately and form two independent air ducts inside the box, namely the first air duct and the second air duct. The first air duct and the second air duct are respectively provided with inlets and outlets to guide the flow of air.

[0025] like Figure 1 As shown, a one-way baffle 5 is hinged to one side of the outlet of the second air duct, and a limiting plate is provided at the outlet of the second air duct. The free end of the one-way baffle 5 is in contact with the limiting plate or the inner wall of the box, so that the box forms two independent air paths.

[0026] In this embodiment, the first refrigeration cycle system and the second refrigeration cycle system are respectively provided with an upper fan cover and a lower fan cover distributed vertically. The top of the one-way baffle 5 is connected to the bottom of the upper fan cover by a hinge. The limiting plate is located at the air outlet of the lower fan cover. The bottom of the free end of the one-way baffle 5 contacts the limiting plate in the windless state, thereby forming two independent air ducts.

[0027] The first refrigeration cycle system includes a first evaporator 1 and a first circulating fan 3, and the second refrigeration cycle system includes a second evaporator 2 and a second circulating fan 4. The first circulating fan 3 is located above the second circulating fan 4. The first circulating fan 3 and the second circulating fan 4 are located on the inlet side of the air duct, and the first evaporator 1 and the second evaporator 2 are located on the outlet side of the air duct.

[0028] Throughout the controlled temperature period, the control system controls the first refrigeration cycle system and the second refrigeration cycle system to operate alternately.

[0029] When the refrigeration system starts, the first refrigeration cycle system works first. Gas is drawn in by the first circulation fan 3, cooled by the first evaporator 1, and sent into the box for circulation to cool the internal space of the box.

[0030] refer to Figure 2 As shown, when the first refrigeration cycle system is running, the free end of the one-way baffle 5, under the action of gravity and the wind force generated by the first air duct, is vertically downward and attached to the limiting plate to isolate the second air duct, thus preventing cold air from entering the second air duct.

[0031] After the first refrigeration cycle system has been running for a certain period of time, the control system will start the second refrigeration cycle system. At this time, the gas is drawn in by the second circulation fan 4, cooled by the second evaporator 2, and sent into the box for circulation to cool the internal space of the box.

[0032] refer to Figure 3 As shown, when the second refrigeration cycle system is running, the free end of the one-way baffle 5 moves towards the inner wall of the box under the action of the wind force generated by the second air duct. When it contacts the inner wall of the box, it isolates the outlet of the second air duct from the first air duct, preventing cold air from entering the first air duct. At this time, the cold gas will only circulate in the lower layer.

[0033] As a further example:

[0034] When switching to the second refrigeration cycle system, the control system simultaneously opens the branch solenoid valve, sending a portion of the high-temperature gas from the compressor into the first evaporator 1 to defrost it and ensure effective heat dissipation. The one-way baffle 5 isolates the upper space, ensuring the operation of the lower second refrigeration cycle system while preventing the first evaporator 1 from being affected by the cold gas inside the casing during defrosting. After the second refrigeration cycle system has been operating for a period of time, the control system switches back to the first refrigeration cycle system. At this time, the second circulation fan 4 shuts off, the one-way baffle 5 closes, and the second evaporator 2 begins defrosting.

[0035] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A ventilation system for a dual-evaporator low-temperature incubator for stress testing, comprising a chamber, wherein the chamber contains a refrigeration system consisting of an evaporator and a circulating fan, and a control system for controlling the operation of the refrigeration system, wherein the refrigeration system and the chamber form an air duct, characterized in that: The refrigeration system is set up with two independently distributed sets inside the box, namely the first refrigeration cycle system and the second refrigeration cycle system. The control system controls the two sets of refrigeration systems to operate alternately and form two independent air ducts inside the box, namely the first air duct and the second air duct. The first air duct and the second air duct are respectively provided with inlets and outlets to guide the flow of air. A one-way baffle (5) is hinged to one side of the outlet of the second air duct, and a limiting plate is provided at the outlet of the second air duct. The free end of the one-way baffle (5) is in contact with the limiting plate or the inner wall of the box, so that the box forms two independent air paths.

2. The air circulation system of a dual-evaporator low-temperature incubator for stress testing according to claim 1, characterized in that: When the first refrigeration cycle system is running, the free end of the one-way baffle (5) is attached to the limiting plate and isolated from the second air duct under the action of gravity and the wind force generated by the first air duct, so as to prevent cold air from entering the second air duct. When the second refrigeration cycle system is running, the free end of the one-way baffle (5) moves toward the inner wall of the box under the action of the wind force generated by the second air duct. When it comes into contact with the inner wall of the box, it isolates the outlet of the second air duct from the first air duct, preventing cold air from entering the first air duct.

3. The air circulation system of a dual-evaporator low-temperature incubator for stress testing according to claim 1, characterized in that: The first refrigeration cycle system includes a first evaporator (1) and a first circulating fan (3), and the second refrigeration cycle system includes a second evaporator (2) and a second circulating fan (4). The first circulating fan (3) is located above the second circulating fan (4). The first circulating fan (3) and the second circulating fan (4) are located on the inlet side of the air duct, and the first evaporator (1) and the second evaporator (2) are located on the outlet side of the air duct.

4. The air circulation system of a dual-evaporator low-temperature incubator for stress testing according to claim 3, characterized in that: The control system controls the first refrigeration cycle system and the second refrigeration cycle system to work alternately. When the first refrigeration cycle system is working, the gas is drawn in by the first circulating fan (3), cooled by the first evaporator (1), and sent into the box for circulation to cool the internal space of the box. After the first refrigeration cycle system has been running for a certain period of time, the control system will start the second refrigeration cycle system. At this time, the gas is drawn in by the second circulation fan (4), cooled by the second evaporator (2), and sent into the box for circulation to cool the internal space of the box.

5. The air circulation system of a dual-evaporator low-temperature incubator for stress testing according to claim 3, characterized in that: The first circulating fan (3) and the second circulating fan (4) are both inclined downward about the horizontal plane.

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