Dual duct environmental test chamber

Abstract

The present invention discloses a dual-duct environmental test chamber, which includes: a test chamber main body, the test chamber main body includes a working cavity, a cooling duct and a heating duct, wherein the working cavity is arranged on one side of the test chamber main body, and the cooling duct and the heating duct are both arranged on the other side of the test chamber main body. In addition, both ends of the cooling duct and both ends of the heating duct are respectively connected to the working cavity. The test chamber main body also includes a heater, a water-cooled heat exchange system and a cooling system, wherein the heater and the water-cooled heat exchange system are arranged in the heating duct, and the cooling system is arranged in the cooling duct. The dual-duct environmental test chamber of the present invention separates the heating and cooling duct of the traditional test chamber into two isolated ducts, the heating duct and the cooling duct, so that the heating process and the cooling process of the test chamber can be carried out through the corresponding independent ducts.

Description

Technical Field

[0001] The present invention relates to the technical field of high and low temperature test chambers, in particular to a double-duct environmental test chamber. Background Art

[0002] High and low temperature testing equipment primarily simulates environmental testing of products under various conditions, including low and high temperatures, to test their physical and other related properties, based on national standards or user requirements. This testing provides a preliminary assessment of whether product performance still meets predetermined requirements. It is primarily used for product design, improvement, qualification, and factory inspection. High and low temperature environmental testing chambers, on the other hand, simulate environmental conditions for testing physical and other related properties under various conditions. During normal operation, the chamber operates according to specific high and low temperature cycles, typically using the same air duct for both heating and cooling, which houses the evaporator, heater, and fan.

[0003] The single-duct design of the existing environmental test chamber means that each heating process requires the refrigeration evaporator to be heated to the same high temperature value as the box body, which increases the energy consumption of the heater. Moreover, when cooling, the evaporator also starts to cool from a high temperature, which also increases the energy consumption of the compressor during cooling. Summary of the Invention

[0004] Based on this, it is necessary to provide a dual-duct environmental test chamber to address the technical problem of unnecessary high energy consumption in the temperature rise and fall process of the existing single-duct environmental test chamber.

[0005] A dual-duct environmental test chamber includes a chamber body, which includes a working chamber, a cooling duct, and a heating duct. The working chamber is located on one side of the chamber body, while the cooling duct and the heating duct are located on the other side. Both ends of the cooling duct and the heating duct are connected to the working chamber.

[0006] The test box body also includes a heater, a water-cooled heat exchange system and a cooling system, wherein the heater and the water-cooled heat exchange system are arranged in the heating air duct, and the cooling system is arranged in the cooling air duct.

[0007] In one embodiment, the above-mentioned working chamber includes a test chamber, an air outlet chamber, an air outlet, a return air chamber and a return air outlet. The test chamber is arranged on one side of the test box body; the air outlet chamber is arranged at the top of the test box body and is connected to the test chamber through an air outlet; the return air chamber is arranged at the bottom of the test box body and is connected to the test chamber through a return air outlet.

[0008] In one embodiment, the cooling air duct and the heating air duct are respectively arranged between the air outlet cavity and the return air cavity, and both ends of the cooling air duct and the heating air duct are respectively connected to the air outlet cavity and the return air cavity.

[0009] In one embodiment, the air outlet cavity is provided with a circulation fan, and the circulation fan is provided at the air outlet.

[0010] In one embodiment, a first electric valve and a second electric valve are respectively provided at both ends of the above-mentioned heating air duct. The first electric valve is provided at the connection port between the heating air duct and the air outlet chamber, and the second electric valve is provided at the connection port between the heating air duct and the return air chamber.

[0011] In one embodiment, the heater is installed in the heating air duct, and the heater is perpendicular to the air flow direction of the heating air duct and is arranged between the first electric valve and the second electric valve.

[0012] In one embodiment, the above-mentioned water-cooled heat exchange system includes a water-cooled heat exchanger, a water pump and an air-cooled heat exchanger; the water-cooled heat exchanger is arranged in the heating air duct, and the water-cooled heat exchanger parallel heater is arranged on the side close to the second electric valve; the water pump and the air-cooled heat exchanger are arranged outside the heating air duct.

[0013] In one embodiment, the output end of the water-cooled heat exchanger, the air-cooled heat exchanger, the water pump and the input end of the water-cooled heat exchanger are connected in sequence through pipes, the input end of the water pump is connected to the air-cooled heat exchanger, and the output end of the water pump is connected to the input end of the water-cooled heat exchanger.

[0014] In one embodiment, a third electric valve and a fourth electric valve are respectively provided at both ends of the cooling air duct. The third electric valve is provided at the connection port between the cooling air duct and the air outlet chamber, and the fourth electric valve is provided at the connection port between the cooling air duct and the return air chamber.

[0015] In one embodiment, the above-mentioned cooling system includes a compressor, a condenser, a throttle valve and an evaporator. The evaporator is arranged in the cooling air duct, and the air flow direction of the evaporator vertically in the cooling air duct is arranged between the third electric valve and the fourth electric valve; the compressor, condenser and throttle valve are arranged outside the cooling air duct.

[0016] In one embodiment, the output end of the evaporator, the compressor, the condenser, the throttle valve and the input end of the evaporator are connected in sequence through pipelines, wherein the medium in the pipeline flows from the compressor, the condenser and the throttle valve through the input end of the evaporator to the evaporator in sequence, and then flows back to the compressor through the output end of the evaporator.

[0017] In summary, the dual-duct environmental test chamber disclosed in the present invention separates the heating and cooling air ducts of a traditional test chamber into two isolated air ducts: a heating duct and a cooling duct. This allows the heating and cooling processes of the test chamber to be carried out through the corresponding independent air ducts. The test chamber can select and switch between the heating and cooling air ducts according to the temperature requirements within the working chamber. When selecting the corresponding air duct, the connection with the other air duct is cut off at the same time, thereby effectively saving the energy consumed by the traditional test chamber to heat up and cool down the air ducts during the heating and cooling processes, while also improving the heating and cooling efficiency within the working chamber. In addition, the dual-duct environmental test chamber of the present invention is equipped with a water-cooled heat exchange system. When the working chamber is kept at a high constant temperature, some test products will release heat, thereby disrupting the internal constant temperature environment. The water-cooled heat exchange system can be activated as needed to perform water cooling and cooling. Compared to the compressor refrigeration of traditional test chambers, the water-cooled heat exchanger can maintain a constant temperature within the working chamber with extremely low energy consumption, thereby further reducing the energy consumption of the test chamber during the high-temperature constant temperature process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a dual-duct environmental test box in one embodiment;

[0019] Figure 2 Schematic diagram of the structure of a dual-duct environmental test box in one embodiment. DETAILED DESCRIPTION

[0020] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0023] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0026] See also Figure 1 and Figure 2The present invention discloses a dual-duct environmental test chamber, which includes a test chamber body 1, which includes a working chamber 11, a cooling duct 12, and a heating duct 13. The working chamber 11 is disposed on one side of the test chamber body 1, while the cooling duct 12 and the heating duct 13 are disposed on the other side of the test chamber body 1. Furthermore, both ends of the cooling duct 12 and the heating duct 13 are connected to the working chamber 11. In this embodiment, the heating duct 13 and the cooling duct 12 independently handle the heating and cooling tasks of the working chamber 11, respectively. When the working cavity 11 needs to be heated up, the heating air duct 13 independently heats the working cavity 11 without the need to heat up the environment in the cooling air duct 12 simultaneously, thereby reducing the energy consumption of the working cavity 11 during the heating process; when the working cavity 11 needs to be cooled down, the cooling air duct 12 independently cools the working cavity 11 without the need to heat up the environment in the heating air duct 13 simultaneously, thereby reducing the energy consumption of the working cavity 11 during the cooling process.

[0027] See also Figure 1 and Figure 2 Furthermore, the working chamber 11 includes a test chamber 111, an air outlet chamber 112, an air outlet 113, a return air chamber 114, and a return air outlet 115. The test chamber 111 is provided on one side of the test chamber body 1; the air outlet chamber 112 is provided on the top of the test chamber body 1 and is connected to the test chamber 111 through an air outlet 113; the return air chamber 114 is provided on the bottom of the test chamber body 1 and is connected to the test chamber 111 through a return air outlet 115. Specifically, the cooling air duct 12 and the heating air duct 13 are respectively provided between the air outlet chamber 112 and the return air chamber 114, and the two ends of the cooling air duct 12 and the two ends of the heating air duct 13 are respectively connected to the air outlet chamber 112 and the return air chamber 114. The cooling air duct 12, the air outlet chamber 112, the air outlet 113, the test chamber 111, the return air outlet 115, and the return air chamber 114 are connected to form a closed cooling airflow loop. In actual application, the cooling air duct 12 circulates and cools the internal environment temperature of the test chamber 111 through the closed cooling airflow loop and keeps the low temperature constant. The heating air duct 13, the air outlet chamber 112, the air outlet 113, the test chamber 111, the return air outlet 115, and the return air chamber 114 are connected to form a closed heating airflow loop. In actual application, the heating channel circulates and heats the internal environment temperature of the test box through the closed heating airflow loop and keeps the high temperature constant. The heating airflow loop and the cooling airflow loop are isolated from each other, thereby realizing the independent operation of the heating program and the cooling program of the internal environment of the test chamber 111.

[0028] See also Figure 1 and Figure 2Furthermore, the air outlet chamber 112 is provided with a circulation fan 1121, which is located at the air outlet 113. The output direction of the circulation fan 1121 is toward the air outlet 113, thereby limiting the air flow direction in the heating air duct 13 and the cooling air duct 12, thereby achieving a one-way backflow of air in the internal environment of the test chamber 111 during the heating process and the cooling process.

[0029] See also Figure 1 and Figure 2 Furthermore, a first electric valve 131 and a second electric valve 132 are respectively provided at both ends of the heating air duct 13. The first electric valve 131 is provided at the connection between the heating air duct 13 and the air outlet chamber 112, and the second electric valve 132 is provided at the connection between the heating air duct 13 and the return air chamber 114. In actual application, the temperature control system can electrically control the first electric valve 131 and the second electric valve 132. When the test chamber 111 starts the heating program, the temperature control system controls the first electric valve 131 and the second electric valve 132 to open and cut off the cooling air duct 12, thereby connecting the heating air duct 13, the air outlet chamber 112, the test chamber 111, and the return air chamber 114. Driven by the circulating fan 1121, the heating air flow starts a one-way backflow, thereby heating the environment in the test chamber 111, thereby completing the heating program and maintaining a constant high temperature.

[0030] See also Figure 1 and Figure 2 Furthermore, the heating air duct 13 is also provided with a heater 133, which is installed in the heating air duct 13. Specifically, the heater 133 is arranged between the first electric valve 131 and the second electric valve 132, perpendicular to the air flow direction of the heating air duct 13. When the test chamber 111 activates the heating program, the heater 133 turns on and heats the gas inside the heating air duct 13, and the circulating fan 1121 blows the high-temperature gas into the test chamber 111, thereby heating the internal environment of the test chamber 111; in addition, the setting of the heater 133 perpendicular to the air flow direction of the heating air duct 13 can ensure that the circulating airflow is fully and evenly heated, thereby reducing the temperature increase error of each area inside the test chamber 111.

[0031] See also Figure 1 and Figure 2Furthermore, the test chamber body 1 also includes a water-cooled heat exchange system 14, which includes a water-cooled heat exchanger 141, a water pump 142, and an air-cooled heat exchanger 143. The water-cooled heat exchanger 141 is arranged in the heating air duct 13, and the water-cooled heat exchanger 141 is arranged in parallel with the heater 133 on the side close to the second electric valve 132; the water pump 142 and the air-cooled heat exchanger 143 are arranged outside the heating air duct 13. When the test chamber 111 is at a constant high temperature, some test products will release heat, thereby destroying the internal constant temperature environment. The water-cooled heat exchange system 14 can be activated for water cooling as needed. Compared with the compressor refrigeration of traditional test chambers, the water-cooled heat exchanger 141 can maintain a constant temperature inside the working chamber 11 with extremely low energy consumption, thereby further reducing the energy consumption of the test chamber during the high-temperature constant temperature process.

[0032] See also Figure 1 and Figure 2 Specifically, the output end of the water-cooled heat exchanger 141, the air-cooled heat exchanger 143, the water pump 142, and the input end of the water-cooled heat exchanger 141 are connected in sequence through pipes, wherein the input end of the water pump 142 is connected to the air-cooled heat exchanger 143, and the output end of the water pump 142 is connected to the input end of the water-cooled heat exchanger 141. In actual application, low-temperature cold water passes through the water-cooled heat exchanger 141 to exchange heat with the internal environment of the heating air duct 13, thereby cooling the heated air flow to a certain extent, thereby balancing the heat released by the test product in the test chamber 111, thereby maintaining a constant temperature environment in the test chamber. The cold water after heat exchange flows back through the pipe. When the external environment temperature is lower than the preset temperature, such as 20°C, the cold water after heat exchange directly passes through the air-cooled heat exchanger 143 to exchange heat with the external environment, and is then output to the water-cooled heat exchanger 141 through the water pump 142 for circulation and cooling.

[0033] See also Figure 1 and Figure 2 Furthermore, a third electric valve 121 and a fourth electric valve 122 are respectively provided at both ends of the cooling air duct 12. The third electric valve 121 is provided at the connection between the cooling air duct 12 and the air outlet chamber 112, and the fourth electric valve 122 is provided at the connection between the cooling air duct 12 and the return air chamber 114. In actual application, the temperature control system can electrically control the third electric valve 121 and the fourth electric valve 122. When the test chamber 111 activates the cooling program, the temperature control system controls the third electric valve 121 and the fourth electric valve 122 to open and cut off the heating air duct 13, thereby connecting the cooling air duct 12, the air outlet chamber 112, the test chamber 111, and the return air chamber 114. Driven by the circulating fan 1121, the cooling airflow starts one-way backflow, thereby cooling the environment in the test chamber 111, thereby completing the cooling program and maintaining a constant low temperature.

[0034] See also Figure 1and Figure 2 Furthermore, the test chamber body 1 also includes a cooling system 15, which includes a compressor 151, a condenser 152, a throttle valve 153, and an evaporator 154. The evaporator 154 is disposed in the cooling air duct 12, and the airflow direction of the evaporator 154 is perpendicular to the cooling air duct 12 and is disposed between the third electric valve 121 and the fourth electric valve 122. The compressor 151, the condenser 152, and the throttle valve 153 are disposed outside the cooling air duct 12. Specifically, the output end of the evaporator 154, the compressor 151, the condenser 152, the throttle valve 153, and the input end of the evaporator 154 are sequentially connected by pipes, wherein the medium in the pipes flows sequentially from the compressor 151, the condenser 152, and the throttle valve 153 through the input end of the evaporator 154 to the evaporator 154, and then flows back to the compressor 151 through the output end of the evaporator 154. When the cooling program is activated in the test chamber 111, the cooling system 15 is activated and cools the gas inside the cooling air duct 12. The circulating fan 1121 blows the low-temperature gas into the test chamber 111, thereby cooling the internal environment of the test chamber 111. In addition, the airflow direction setting of the evaporator 154 vertically in the cooling air duct 12 can enable the circulating airflow to be fully and evenly cooled, thereby reducing the cooling error of each area inside the test chamber 111.

[0035] In summary, the dual-duct environmental test chamber disclosed in the present invention separates the heating and cooling air ducts of a traditional test chamber into two isolated air ducts: a heating duct and a cooling duct. This allows the heating and cooling processes of the test chamber to be carried out through the corresponding independent air ducts. The test chamber can select and switch between the heating and cooling air ducts according to the temperature requirements within the working chamber. When selecting the corresponding air duct, the connection with the other air duct is cut off at the same time, thereby effectively saving the energy consumed by the traditional test chamber to heat up and cool down the air ducts during the heating and cooling processes, while also improving the heating and cooling efficiency within the working chamber. In addition, the dual-duct environmental test chamber of the present invention is equipped with a water-cooled heat exchange system. When the working chamber is kept at a high constant temperature, some test products will release heat, thereby disrupting the internal constant temperature environment. The water-cooled heat exchange system can be activated as needed to perform water cooling and cooling. Compared to the compressor refrigeration of traditional test chambers, the water-cooled heat exchanger can maintain a constant temperature within the working chamber with extremely low energy consumption, thereby further reducing the energy consumption of the test chamber during the high-temperature constant temperature process.

[0036] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A dual-duct environmental test chamber, characterized in that: include: A test chamber body, the test chamber body comprising a working chamber, a cooling air duct, and a heating air duct, the working chamber being arranged on one side of the test chamber body, the cooling air duct and the heating air duct being arranged on the other side of the test chamber body, and both ends of the cooling air duct and the heating air duct being connected to the working chamber respectively; The test box body further includes a heater, a water-cooled heat exchange system and a cooling system. The heater and the water-cooled heat exchange system are arranged in the heating air duct, and the cooling system is arranged in the cooling air duct.

2. The dual-duct environmental test chamber according to claim 1, characterized in that: The working chamber includes a test chamber, an air outlet chamber, an air outlet, a return air chamber and a return air outlet. The test chamber is arranged on one side of the test box body; the air outlet chamber is arranged at the top of the test box body and is connected to the test chamber through the air outlet; the return air chamber is arranged at the bottom of the test box body and is connected to the test chamber through the return air outlet.

3. The dual-duct environmental test chamber according to claim 2, characterized in that: The cooling air duct and the heating air duct are respectively arranged between the air outlet cavity and the return air cavity, and two ends of the cooling air duct and two ends of the heating air duct are respectively connected to the air outlet cavity and the return air cavity.

4. The dual-duct environmental test chamber according to claim 2, characterized in that: The air outlet cavity is provided with a circulation fan, and the circulation fan is arranged at the air outlet.

5. The dual-duct environmental test chamber according to claim 3, characterized in that: A first electric valve and a second electric valve are respectively provided at both ends of the heating air duct. The first electric valve is provided at the connection port of the heating air duct and the air outlet cavity, and the second electric valve is provided at the connection port of the heating air duct and the return air cavity.

6. The dual-duct environmental test chamber according to claim 5, characterized in that: The water-cooled heat exchange system includes a water-cooled heat exchanger, a water pump and an air-cooled heat exchanger; the water-cooled heat exchanger is arranged in the heating air duct, and the water-cooled heat exchanger is arranged parallel to the heater on the side close to the second electric valve; the water pump and the air-cooled heat exchanger are arranged outside the heating air duct.

7. The dual-duct environmental test chamber according to claim 6, characterized in that: The output end of the water-cooled heat exchanger, the air-cooled heat exchanger, the water pump and the input end of the water-cooled heat exchanger are connected in sequence through pipes, the input end of the water pump is connected to the air-cooled heat exchanger, and the output end of the water pump is connected to the input end of the water-cooled heat exchanger.

8. The dual-duct environmental test chamber according to claim 7, characterized in that: A third electric valve and a fourth electric valve are respectively provided at both ends of the cooling air duct. The third electric valve is provided at the connection port of the cooling air duct and the air outlet cavity, and the fourth electric valve is provided at the connection port of the cooling air duct and the return air cavity.

9. The dual-duct environmental test chamber according to claim 8, characterized in that: The cooling system includes a compressor, a condenser, a throttle valve and an evaporator. The evaporator is arranged in the cooling air duct, and the air flow direction of the evaporator vertical cooling air duct is arranged between the third electric valve and the fourth electric valve; the compressor, the condenser and the throttle valve are arranged outside the cooling air duct.

10. The dual-duct environmental test chamber according to claim 9, characterized in that: The output end of the evaporator, the compressor, the condenser, the throttle valve and the input end of the evaporator are connected in sequence through pipelines.

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