A constant temperature and constant air volume air supply device and air supply system

Abstract

This utility model provides a constant temperature and constant air volume air supply device and system. The constant temperature and constant air volume air supply device includes a housing with a cavity for housing an evaporator. A ventilation opening is provided on one side wall of the housing to connect the cavity to the outside. An air outlet is also provided on any side wall of the housing. The device further includes: a first fan disposed within the cavity; and a second fan disposed outside the housing to output airflow to the work area, connected to the air outlet via a pipe. This utility model provides a constant temperature and constant air volume air supply device that can provide constant temperature and constant airflow during product testing or inspection. Furthermore, this technical solution enables precise temperature-controlled airflow with a constant air volume, thereby improving the effectiveness of testing or inspection.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, specifically to a constant temperature and constant air volume air supply device and air supply system. Background Technology

[0002] The testing of certain products needs to be conducted in an environment with stable airflow and constant temperature. For example, when testing the heat exchange capacity of an air-cooled heat sink installed on a computer chip, the test needs to be conducted in an environment with constant airflow and constant temperature.

[0003] Currently, a cooling chamber provides a fixed amount of air to the product testing area to simulate an environment with constant airflow and temperature. Specifically, an evaporator is installed inside the cooling chamber to cool the air, while a fan mounted on the chamber rotates at a constant speed to provide a constant and temperature-controlled airflow. For example, assuming the fan speed is set to 1000 RPM and the airflow is 100 CMF, the presence of several components inside the cooling chamber significantly increases airflow resistance. Therefore, at a fan speed of 1000 RPM, the actual airflow is far less than 100 CMF. This necessitates increasing the fan speed, and the exhaust volume cannot be accurately calculated during fan rotation, thus failing to provide a precise airflow for simulating environmental conditions during product testing.

[0004] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0005] One objective of this utility model is to provide a constant temperature and constant air volume air supply device system to solve the above-mentioned technical problems. The utility model adopts the following technical solution: A constant temperature and constant air volume air supply device includes a housing, the housing being formed into a cavity for placing an evaporator, and a vent for communicating the cavity with the outside being provided on one side wall of the housing, and an air outlet being provided on any one side wall of the housing, and further includes: A first fan is disposed within the cavity; A second fan is disposed outside the housing to output airflow to the work area, and the second fan is connected to the air outlet through a pipe.

[0006] Furthermore, a partition is provided inside the cavity, which divides the cavity into a first cavity and a second cavity that are independent of each other. The evaporator is fixedly installed inside the first cavity, and the vent is located on the inner wall of the first cavity. The air outlet is located on any side wall of the second cavity. The first fan is installed on the partition and connects the first cavity and the second cavity.

[0007] Furthermore, a pressure relief port is provided on the side wall of the second cavity, which connects the second cavity to the outside. A pressure relief cover is provided on the side wall of the housing to close the pressure relief port. The upper end of the pressure relief cover is rotatably connected to the side wall of the housing, and the other end hangs down by gravity to close the pressure relief port.

[0008] Furthermore, the second cavity is provided with an inclined sidewall for forming the pressure relief port, so that the lower end of the pressure relief cover rests on the sidewall by gravity and closes the pressure relief port.

[0009] Furthermore, a temperature sensor connected to the control system signal is installed inside the second cavity.

[0010] Furthermore, an air volume sensor connected to the control system signal is installed inside the first cavity.

[0011] Furthermore, a heater is also fixedly installed inside the cavity.

[0012] Another objective of this utility model is to provide an air supply system, the technical solution of which is as follows: An air supply system includes a refrigeration unit, the refrigeration unit including a compressor, a condenser, a fan system disposed inside a casing, and pipes connected to the condenser for supplying refrigerant, characterized in that it further includes at least one constant temperature and constant air volume air supply device as described in any one of claims 1-7, all the constant temperature and constant air volume air supply devices as described in any one of claims 1-7 are connected side by side on the pipes, and control valves are respectively provided on the pipes for controlling the flow of refrigerant into the evaporator.

[0013] The beneficial effects of this utility model are as follows: One objective of this invention is to provide a constant airflow and constant air volume air supply device. A first fan starts to draw in external air through a vent into a chamber, where it is cooled by an evaporator. The air then flows towards the outlet and enters the duct. Simultaneously, a second fan starts, drawing in the airflow from the first fan and directing it towards the testing area. It is worth noting that the first fan operates at a higher speed than the second fan, providing sufficient airflow. The second fan operates at its rated speed. Since the airflow is supplied by the first fan, it can be directly drawn in without obstruction. The airflow drawn and output by the second fan is constant and accurate, ensuring the accuracy of product testing or inspection.

[0014] Another objective of this invention is to provide an air supply system that connects a refrigeration unit to multiple air supply devices and controls the corresponding air supply devices through control valves, thereby enabling multiple air supply devices to operate independently, achieving large-scale and simultaneous operation of multiple units, and improving performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the air supply device in this utility model.

[0016] Figure 2 This is an exploded structural diagram of the air supply device in this utility model.

[0017] Figure 3 This is a cross-sectional view of the air supply device in this utility model.

[0018] Figure 4 This is a schematic diagram of the refrigeration unit in this utility model.

[0019] In the diagram: 100 - air supply device; 110 - housing; 111 - evaporator; 112 - cavity; 113 - vent; 114 - air outlet; 120 - first fan; 130 - second fan; 131 - duct; 115 - partition; 116 - first cavity; 117 - second cavity; 119 - pressure relief cover; 140 - temperature sensor; 150 - airflow sensor; 160 - heater; 200 - refrigeration unit; 201 - compressor; 204 - control valve. Detailed Implementation

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0021] In this embodiment of the utility model, a constant temperature and constant air volume air supply device 100 is provided to provide constant temperature and constant air volume during product testing or inspection. Furthermore, this technical solution can accurately measure the air volume of a constant temperature airflow to improve the testing or inspection effect.

[0022] Specifically, such as Figure 1-3 As shown, the constant temperature and constant air volume air supply device 100 provided in this embodiment includes a housing 110, the housing 110 is formed into a cavity 112 for placing an evaporator 111, and a ventilation port 113 is provided on one side wall of the housing 110 to connect the cavity 112 with the outside. An air outlet 114 is also provided on any side wall of the housing 110. It also includes a first fan 120 and a second fan 130, wherein the first fan 120 is disposed inside the cavity 112; the second fan 130 is disposed outside the housing 110 to output airflow to the working area, and the second fan 130 is connected to the air outlet 114 through a pipe 131.

[0023] During the process of providing a fixed airflow, the first fan 120 starts to draw in external air through the vent 113 into the chamber. After passing through the evaporator 111, the air is cooled and flows towards the outlet 114 and enters the pipe 131. At this time, the second fan 130 starts to extract the airflow delivered by the first fan 120 and deliver it to the detection area. It is worth noting that the rotational speed of the first fan 120 is greater than that of the second fan 130. The first fan 120 can provide sufficient airflow. The second fan 130 operates at its rated speed. Since the airflow is provided by the first fan 120, the airflow can be directly extracted by the second fan 130 during its operation without any obstruction or interference. The airflow extracted and output by the second fan 130 is constant and accurate, thus ensuring the accuracy of product testing or inspection.

[0024] In this technical solution, in order to ensure that the second fan 130 can draw sufficient airflow, a partition 115 is provided inside the cavity 112. The partition 115 divides the cavity 112 into a first cavity 116 and a second cavity 117 that are independent of each other. The evaporator 111 is fixedly installed inside the first cavity 116, and the vent 113 is located on the inner wall of the first cavity 116. The air outlet 114 is located on any side wall of the second cavity 117. The first fan 120 is installed on the partition 115 and connects the first cavity 116 and the second cavity 117.

[0025] In other words, the first fan 120 draws and delivers the constant-temperature airflow into the second chamber 117. At this time, the first fan 120 draws the constant-temperature airflow located in the second chamber 117 and the pipe 131 and outputs it to the detection area. By delivering the airflow in two stages, it can be ensured that the second fan 130 can draw enough air and deliver it to the detection area during the air delivery process. Furthermore, since there are no components in the second chamber 117 and the pipe 131 that obstruct the airflow, it can be ensured that the airflow is drawn smoothly, and that the second fan 130 can accurately output the rated airflow.

[0026] In this technical solution, to avoid excessive airflow within the second cavity 117, which could affect the accuracy of the airflow output of the second fan 130, a pressure relief structure is provided within the second cavity 117 to discharge excess airflow delivered by the first fan 120. It is worth noting that, in order to provide sufficient airflow and ensure that the second fan 130 can output sufficient and rated airflow, the rated speed of the first fan 120 is usually set to be greater than the rated speed of the second fan 130. That is, the airflow output by the first fan 120 is greater than the airflow required by the second fan 130. After the first fan 120 outputs airflow into the second cavity 117, and the second fan 130 extracts its rated airflow, the remaining portion is discharged through the pressure relief structure, thereby avoiding affecting the accuracy of the airflow delivered by the second fan 130.

[0027] Specifically, such as Figure 2-3 As shown, a pressure relief port is provided on the side wall of the second cavity 117, which connects the second cavity 117 to the outside. A pressure relief cover 119 is provided on the side wall of the housing 110 to close the pressure relief port. The upper end of the pressure relief cover 119 is rotatably connected to the side wall of the housing 110, and the other end hangs down by gravity to close the pressure relief port. The pressure relief port and the pressure relief cover 119 form a pressure relief structure, which allows the air pressure in the second cavity 117 to be discharged through the pressure relief port when it is greater than the air volume extracted by the second fan 130. During operation, the pressure relief port is closed by the pressure relief cover 119. When the air pressure is higher than the air volume extracted by the second fan 130, the pressure relief cover 119 is pushed up by the air pressure, thereby allowing the air to be discharged through the pressure relief port.

[0028] In this embodiment, to ensure sufficient air pressure within the second cavity 117 for the second fan 130 to collect air, such as... Figure 2-3As shown, the sidewall of the second cavity 117 with the pressure relief port is inclined, so that the lower end of the pressure relief cover 119 rests on the sidewall by gravity and closes the pressure relief port. That is to say, when the pressure relief cover 119 is attached to the inclined sidewall and closes the pressure relief port, the pressure relief cover 119 is also in an inclined state. Under the action of gravity, it can improve the sealing performance of the pressure relief port and ensure that there is sufficient air volume in the second cavity 117 for the second fan 130 to draw.

[0029] Furthermore, to provide a constant-temperature airflow, a temperature sensor 140 connected to the control system signal is installed inside the second chamber 117. Air within the second chamber 117 is directly delivered to the detection space via the second fan 130. By detecting the temperature of the air within the second chamber 117, the control system can promptly adjust the refrigerant operation within the evaporator 111 when temperature fluctuations occur, thereby adjusting the temperature to provide a constant-temperature airflow. It is worth noting that the control system's adjustment of the refrigerant in the evaporator 111 to achieve temperature control can be implemented using existing technologies, as long as the temperature emitted by the evaporator 111 is sufficient. Specific technical solutions are not limited here.

[0030] Similarly, to ensure that air is drawn from the first chamber 116 and delivered to the second chamber 117 during the operation of the first fan 120, and to ensure that the airflow generated in the first chamber 116 by the first fan 120 is higher than the airflow discharged by the second fan 130, an airflow sensor 150 connected to the control system is installed in the first chamber 116. This allows for real-time monitoring of the airflow discharged by the first fan 120. When the airflow is insufficient, the control system can increase the speed of the first fan 120 to increase the airflow. It should be reiterated that the airflow sensor detects the airflow in the first chamber, enabling the control system to adjust the speed of the first fan. Because several devices are present in the first chamber, precise adjustment of the airflow output by the first fan is not possible. To meet the timeliness requirements of product testing or inspection, the airflow delivered to the second chamber is quickly increased by increasing the speed of the first fan, ensuring that the second fan can draw sufficient airflow and output a constant volume of air.

[0031] In this embodiment, to broaden the applicability of the device, a heater 160 is also fixedly installed inside the cavity 112. By installing the heater 160, both cold and hot air can be discharged, thereby increasing the applicability of the device. In winter or in areas with low temperatures, the evaporator 111 can be turned off and the heater 160 can be turned on to output hot air at a constant temperature.

[0032] Another objective of this invention is to provide an air supply system, which includes a refrigeration unit 200, such as... Figure 4 As shown, the refrigeration unit 200 includes a compressor 201, a condenser, a fan system, and piping connected to the condenser for supplying refrigerant, all housed inside the casing. It also includes at least one constant-temperature, constant-airflow air supply device 100. All the constant-temperature, constant-airflow air supply devices 100 are connected side-by-side to the piping, and control valves 204 are installed on the piping to control the flow of refrigerant into the evaporator 111. In this technical solution, multiple air supply devices 100 are connected in parallel and communicate with the piping. Under the control of the corresponding control valves 204, one air supply device 100 can be individually opened or closed, thereby enabling large-scale operation of multiple units simultaneously and independent control between them.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A constant temperature and constant air volume air supply device, comprising a housing, the housing having a cavity for housing an evaporator, a vent for connecting the cavity to the outside being provided on one side wall of the housing, and an air outlet being provided on any one side wall of the housing, characterized in that, It also includes: A first fan is disposed within the cavity; A second fan is disposed outside the housing to output airflow to the work area, and the second fan is connected to the air outlet through a pipe.

2. The constant temperature and constant air volume air supply device according to claim 1, characterized in that, A partition is provided inside the cavity, which divides the cavity into a first cavity and a second cavity that are independent of each other. The evaporator is fixedly installed inside the first cavity, and the vent is located on the inner wall of the first cavity. The air outlet is located on any side wall of the second cavity. The first fan is installed on the partition and connects the first cavity and the second cavity.

3. The constant temperature and constant air volume air supply device according to claim 2, wherein A pressure relief port is provided on the side wall of the second cavity, which connects the second cavity to the outside. A pressure relief cover is provided on the side wall of the housing to close the pressure relief port. The upper end of the pressure relief cover is rotatably connected to the side wall of the housing, and the other end hangs down by gravity to close the pressure relief port.

4. The constant temperature and constant air volume air supply device according to claim 3, characterized in that, The second cavity has an inclined sidewall with the pressure relief port, so that the lower end of the pressure relief cover rests on the sidewall by gravity and closes the pressure relief port.

5. The constant temperature and constant air volume air supply device according to claim 2, wherein A temperature sensor connected to the control system signal is installed inside the second cavity.

6. The constant temperature and constant air volume air supply device according to claim 2, characterized in that, An air volume sensor connected to the control system signal is installed inside the first cavity.

7. The constant temperature and constant air volume air supply device according to claim 1, characterized in that, A heater is also fixedly installed inside the cavity.

8. An air supply system comprising a refrigeration unit, the refrigeration unit including a compressor, a condenser, a fan system disposed inside a casing, and pipes connected to the condenser for supplying refrigerant, characterized in that, It also includes at least one constant temperature and constant air volume air supply device as described in any one of claims 1-7, all the constant temperature and constant air volume air supply devices as described in any one of claims 1-7 are connected side by side on the pipe fitting, and the pipe fitting is provided with control valves for controlling the flow of refrigerant into the evaporator.

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