Independent sub-control device for temperature and humidity of main surface air cooler and auxiliary surface air cooler of air conditioner

Abstract

The temperature and humidity independent sub-control device comprises a fresh air pipeline, an air supply pipeline and an air return pipeline, the tail end of the fresh air pipeline is communicated with the head end of the air supply pipeline, the main surface air cooler is arranged in the fresh air pipeline, and the tail end of the air return pipeline is communicated with the fresh air pipeline and located on the air inlet side of the main surface air cooler. A branch pipeline is further arranged between the air return pipeline and the air supply pipeline, the head end of the branch pipeline is communicated with the air return pipeline, the tail end of the branch pipeline is communicated with the air supply pipeline, an auxiliary surface air cooler is arranged in the branch pipeline, the main surface air cooler and the auxiliary surface air cooler are independently controlled, and a first air door is arranged in the air return pipeline and located on the downstream of the joint of the branch pipeline and the air return pipeline. Compared with the prior art, the utility model has the advantages of effectively reducing or eliminating the reheating phenomenon under the dehumidification working condition in summer, saving energy and reducing consumption.

Description

Technical Field

[0001] This utility model relates to combined air conditioning units for the tobacco industry, and more particularly to an independent temperature and humidity control device for the main and auxiliary cooling coils of an air conditioner. Background Technology

[0002] In the process-oriented combined air conditioning units of cigarette factories, the outlet end of the fresh air duct is connected to the supply air duct. A surface cooler is installed inside the fresh air duct, and a return air duct is located on the air inlet side of the surface cooler. The return air in the return air duct mixes with the fresh air in the fresh air duct to form a mixed air. After being cooled and dehumidified by the surface cooler, the mixed air is then supplied to the rear through the supply air duct. During summer dehumidification, the air entering the fresh air duct is high-temperature and high-humidity fresh air. The mixed air, after being dehumidified by the surface cooler, needs to be reheated to achieve the required temperature and humidity. For air conditioning systems with relatively small cooling loads and large supply air volumes in summer, the reheating required for air treatment is particularly significant. The need for air reheating during dehumidification not only results in energy waste due to the offsetting of cooling and heating, but also requires providing a steam heat source for the air conditioning system in summer. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an independent temperature and humidity control device for the main and auxiliary cooling coils of an air conditioner, so as to reduce or eliminate the reheating phenomenon under summer dehumidification conditions, thereby saving energy and reducing consumption.

[0004] This utility model is achieved through the following technical solution:

[0005] An independent temperature and humidity control device for main and auxiliary surface coolers of an air conditioner includes a fresh air duct, a supply air duct, and a return air duct. The end of the fresh air duct is connected to the beginning of the supply air duct. A main surface cooler is installed inside the fresh air duct. The end of the return air duct is connected to the fresh air duct and is located on the air inlet side of the main surface cooler. A branch duct is also provided between the return air duct and the supply air duct. The beginning of the branch duct is connected to the return air duct, and the end is connected to the supply air duct. An auxiliary surface cooler is installed inside the branch duct. The main surface cooler and the auxiliary surface cooler are independently controlled. A first damper is provided inside the return air duct and is located downstream of the junction of the branch duct and the return air duct.

[0006] As a preferred embodiment of the above-mentioned independent temperature and humidity control device for the main and auxiliary air coolers of the air conditioner, the return air duct is an L-shaped duct consisting of a horizontal return air section and a vertical return air section, and the end of the vertical return air section of the return air duct is connected to the fresh air duct.

[0007] As a preferred embodiment of the above-mentioned independent temperature and humidity control device for the main and auxiliary cooling coils of the air conditioner, the branch pipe is an L-shaped pipe composed of a horizontal branch pipe section and a vertical branch pipe section. The horizontal branch pipe section is connected to the vertical return air section of the return air pipe, and the auxiliary cooling coil is installed in the horizontal branch pipe section.

[0008] As a preferred embodiment of the above-mentioned independent temperature and humidity control device for the main and auxiliary air coolers of the air conditioner, a second damper is provided in the fresh air duct and a third damper is provided in the return air duct. The second damper is located upstream of the junction of the return air duct and the fresh air duct, and the third damper is located upstream of the junction of the branch duct and the return air duct.

[0009] This invention has the following advantages over the prior art:

[0010] This utility model provides an independent temperature and humidity control device for the main and auxiliary surface coolers of an air conditioner. It adds a branch pipe between the return air duct and the supply air duct, and installs an auxiliary surface cooler in the branch pipe. The main surface cooler and the auxiliary surface cooler are controlled independently, and can independently process the cooling and dehumidification of fresh air and return air. After obtaining air in different states, they are mixed in the supply air duct, so that the mixed air reaches a suitable supply air state as much as possible. This effectively reduces or eliminates the reheat phenomenon under summer dehumidification conditions and reduces energy waste caused by the cancellation of cold and heat. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] The numbers in the diagram are: 1. Fresh air duct; 2. Supply air duct; 3. Return air duct; 4. Main air cooler; 5. Branch duct; 6. Auxiliary air cooler; 7. First damper; 8. Second damper; 9. Third damper. Detailed Implementation

[0013] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0014] See Figure 1 This embodiment discloses an independent temperature and humidity control device for the main and auxiliary surface coolers 6 of an air conditioner, including a fresh air duct 1, a supply air duct 2, and a return air duct 3. The end of the fresh air duct 1 is connected to the beginning of the supply air duct 2. A main surface cooler 4 is installed inside the fresh air duct 1. The end of the return air duct 3 is connected to the fresh air duct 1 and is located on the air inlet side of the main surface cooler 4. A branch duct 5 is also provided between the return air duct 3 and the supply air duct 2. The beginning of the branch duct 5 is connected to the return air duct 3, and the end is connected to the supply air duct 2. An auxiliary surface cooler 6 is installed inside the branch duct 5. The main surface cooler 4 and the auxiliary surface cooler 6 are independently controlled. A first damper 7 is provided inside the return air duct 3. The first damper 7 is located downstream of the junction of the branch duct 5 and the return air duct 3. A second damper 8 is provided inside the fresh air duct 1, and a third damper 9 is provided inside the return air duct 3. The second damper 8 is located upstream of the junction of the return air duct 3 and the fresh air duct 1, and the third damper 9 is located upstream of the junction of the branch duct 5 and the return air duct 3.

[0015] Return air duct 3 is an L-shaped duct consisting of a horizontal return air section and a vertical return air section. The end of the vertical return air section of return air duct 3 is connected to the fresh air duct 1. Branch duct 5 is an L-shaped duct consisting of a horizontal branch section and a vertical branch section. The horizontal branch section of branch duct 5 is connected to the vertical return air section of return air duct 3. The auxiliary surface cooler 6 is installed in the horizontal branch section.

[0016] Taking the tobacco premixing room as an example, the tobacco premixing room requires constant temperature and humidity throughout the year, with a target control accuracy of 25±2℃ and 60±5%RH for indoor air temperature and humidity. The air conditioning unit in the tobacco premixing room is modified to an independent control device as provided in this embodiment. Specifically, a branch pipe 5 is added between the return air duct 3 and the supply air duct 2, and a secondary surface cooler 6 is installed in this branch pipe 5. The main surface cooler 4 and the secondary surface cooler 6 are independently controlled, allowing for independent cooling and dehumidification of the fresh air and return air respectively. The main surface cooler 4 is responsible for the main dehumidification work, while the secondary surface cooler 6 performs a small amount of dehumidification or no dehumidification. After being processed to different degrees by the two sets of surface coolers, the air in different states is mixed in the supply air duct 2, ensuring that the mixed air reaches the required temperature and humidity state as much as possible. This effectively reduces or eliminates reheating during summer dehumidification, reducing energy waste caused by heat and cold offsetting. Furthermore, the first damper 7 allows a portion of the return air to enter the distribution duct 5 and be processed by the auxiliary surface cooler 6, while the other portion enters the fresh air duct 1, mixes with the fresh air, and is then processed by the main surface cooler 4. The air, processed separately by the two surface coolers, is then mixed again in the distribution duct 5, ensuring that the mixed air approaches or reaches the desired temperature and humidity levels. By adjusting the opening of the first damper 7, the airflow distribution between the return air entering the distribution duct 5 and the fresh air duct 1 can be flexibly adjusted according to actual conditions, ensuring that the final mixed air approaches or reaches the desired temperature and humidity levels, further reducing or eliminating reheating.

[0017] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A separate temperature and humidity control device for main and auxiliary air coolers in an air conditioner, comprising a fresh air duct, a supply air duct, and a return air duct, wherein the end of the fresh air duct is connected to the beginning of the supply air duct, a main air cooler is installed inside the fresh air duct, and the end of the return air duct is connected to the fresh air duct and located on the air inlet side of the main air cooler, characterized in that: A branch pipe is also provided between the return air duct and the supply air duct. The first end of the branch pipe is connected to the return air duct and the last end is connected to the supply air duct. An auxiliary surface cooler is provided in the branch pipe. The main surface cooler and the auxiliary surface cooler are controlled independently. A first damper is provided inside the return air duct. The first damper is located downstream of the junction of the branch pipe and the return air duct.

2. The independent temperature and humidity control device for the main and auxiliary cooling coils of an air conditioner as described in claim 1, characterized in that: The return air duct is an L-shaped duct consisting of a horizontal return air section and a vertical return air section, with the end of the vertical return air section connected to the fresh air duct.

3. The independent temperature and humidity control device for the main and auxiliary cooling coils of an air conditioner as described in claim 2, characterized in that: The branch pipe is an L-shaped pipe consisting of horizontal and vertical branch pipe sections. The horizontal branch pipe section is connected to the vertical return air section of the return air pipe, and the auxiliary surface cooler is installed in the horizontal branch pipe section.

4. The independent temperature and humidity control device for the main and auxiliary cooling coils of an air conditioner as described in claim 1, characterized in that: The fresh air duct is equipped with a second air damper, and the return air duct is equipped with a third air damper. The second air damper is located upstream of the junction of the return air duct and the fresh air duct, and the third air damper is located upstream of the junction of the branch duct and the return air duct.

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