Fresh air system and indoor humidity adjusting device thereof

Abstract

The utility model discloses a fresh air system and an indoor humidity adjusting device thereof. The indoor humidity adjusting device of the fresh air system comprises a dehumidification device, an air valve, a Pitot tube and a humidity sensor, the air valve is installed at an outlet of an air supply pipeline of the fresh air system, the dehumidification device is installed in the air supply pipeline, the Pitot tube is installed between the dehumidification device and the air valve, and the humidity sensor is installed indoors. According to the indoor humidity adjusting device, due to the fact that the dehumidification device is arranged in the air supply pipeline of the fresh air system and the air valve is arranged in the air supply pipeline of the fresh air system in a matched mode, the opening degree of the air valve can be manually or electrically adjusted, meanwhile, dehumidification adjustment can be conducted on air supplied by the fresh air system through the dehumidification device, and the purpose of adjusting the indoor humidity is achieved. Meanwhile, the indoor humidity adjusting device has the advantages of being compact in structure, stable and reliable in work and easy to achieve.

Description

Technical Field

[0001] The utility model relates to the technical field of humidity regulating devices, in particular to a fresh air system and an indoor humidity regulating device thereof. Background Art

[0002] At present, traditional air conditioners mainly focus on temperature control, and cannot effectively control indoor humidity in some application scenarios where there are densely populated indoor areas and the amount of moisture dissipation is high. In addition, conventional fan coil units use electric two-way valves to control water volume, which cannot avoid water imbalance and are accompanied by large flow and small temperature differences, resulting in energy waste. Utility Model Content

[0003] The main purpose of the utility model is to provide a fresh air system and an indoor humidity regulating device thereof, which are intended to be combined with an air conditioner to regulate indoor humidity.

[0004] To achieve the above-mentioned purpose, the utility model provides an indoor humidity regulating device for a fresh air system, comprising a dehumidification device, an air valve, a Pitot tube and a humidity sensor, wherein an air valve is installed at the outlet of an air supply duct of the fresh air system, the dehumidification device is installed inside the air supply duct, a Pitot tube is installed between the dehumidification device and the air valve, and the humidity sensor is installed indoors.

[0005] Preferably, an air supply fan is also installed inside the air supply duct, and the air supply fan is a variable frequency fan.

[0006] Preferably, the indoor humidity regulating device further comprises a controller, and the controller is connected to the signal input end of the humidity sensor.

[0007] Preferably, a pressure-conducting pipe is installed at the outlet of the Pitot tube, the pressure-conducting pipe is connected to an air volume transmitter, and a signal output end of the air volume transmitter is connected to a controller.

[0008] Preferably, a humidifying device and a carbon dioxide sensor are also installed on the air supply duct, and control ends of the humidifying device and the carbon dioxide sensor are connected to the controller.

[0009] Preferably, the indoor humidity regulating device further comprises a display and a temperature sensor installed indoors, the signal output ends of the temperature sensor and the humidity sensor are both connected to the display, and the control end of the display is connected to the controller.

[0010] Preferably, the display is provided with an indoor control panel, and the indoor control panel is provided with a temperature adjustment button and a humidity adjustment button.

[0011] Preferably, an auxiliary heating device is also installed inside the air supply duct.

[0012] The utility model further proposes a fresh air system, including the indoor humidity regulating device of the fresh air system mentioned above, and also including a fan coil installed indoors, the fan coil is connected to the circulating water system of the air-conditioning system to cool or heat the indoor room, and the fan coil is connected to the circulating water system through an electric water valve with an electric actuator.

[0013] Preferably, a flow meter is also installed between the circulating water inlet of the fan coil unit and the electric water valve.

[0014] The indoor humidity regulating device proposed by the utility model has a dehumidifying device and an air valve in the air supply duct of the fresh air system, so the opening of the air valve can be adjusted manually or electrically, and the air supply of the fresh air system can be dehumidified by the dehumidifying device, thereby achieving the purpose of adjusting the indoor humidity. At the same time, the indoor humidity regulating device has the advantages of compact structure, stable and reliable operation, and easy implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a preferred embodiment of the fresh air system of the utility model.

[0016] In the figure, 1- air supply duct, 2- dehumidification device, 3- Pitot tube, 4- air valve, 5, 8, 11, 15- signal line, 6- pressure pipe, 7- air volume transmitter, 9- controller, 10- computer, 12- electric water valve, 13- flow meter, 14- fan coil unit, 16- display screen, 17- indoor control panel, 18- humidity sensor, 19- temperature sensor, 20- indoor space, 21- carbon dioxide sensor.

[0017] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] The utility model provides an indoor humidity regulating device for a fresh air system.

[0021] Reference Figure 1 In the preferred embodiment, an indoor humidity regulating device of a fresh air system includes a dehumidifier 2, an air valve 4, a Pitot tube 3 and a humidity sensor 18, wherein an air valve 4 is installed at the outlet of an air supply pipe 1 of the fresh air system, the dehumidifier 2 is installed inside the air supply pipe 1, a Pitot tube 3 is installed between the dehumidifier 2 and the air valve 4, and the humidity sensor 18 is installed indoors.

[0022] The structure of the dehumidification device 2 can adopt a conventional structure in the prior art. Furthermore, an air supply fan is installed inside the air supply pipe 1. By setting the air supply fan, the purified fresh air from the outside is sent into the room through the air supply pipe 1. The air supply fan preferably adopts a variable frequency fan with a dehumidification function, realizes humidity control and performs fan variable frequency control, supplies according to actual demand, and reduces energy consumption.

[0023] Furthermore, the indoor humidity control device further includes a controller 9 (a programmable controller may be used), and the controller 9 is connected to the signal input end of the humidity sensor 18. By setting the controller 9, the operation of the dehumidification device 2 can be flexibly adjusted according to the real-time humidity and the opening of the air valve 4 can be controlled accordingly. The controller 9 is connected to a computer 10.

[0024] The dehumidification device is independently controlled by a controller, and regional temperature and humidity control can be achieved without relying on BA (building automation) and other near-field controls. The commissioning and operation are simple, reducing on-site installation and communication time.

[0025] Specifically, in this embodiment, a pressure pipe 6 is installed at the outlet of the Pitot tube 3, and the pressure pipe 6 is connected to the air volume transmitter 7, and the signal output end of the air volume transmitter 7 is connected to the controller 9. The Pitot tube 3 measures the wind pressure, and transmits the dynamic pressure and static pressure to the air volume transmitter 7 through the pressure pipe 6, and the air volume transmitter 7 outputs the measured air volume value in the air duct to the controller 9, so that the controller 9 can adjust the air valve 4 and the dehumidification device 2.

[0026] The air volume in the air duct is monitored in real time through the Pitot tube 3 and the air volume transmitter 7 and transmitted to the controller 9. The controller 9 compares the real-time monitored air volume with the required air volume of the indoor environment to adjust the air valve 4 so that the measured air volume meets the required air volume, thereby achieving humidity control and eliminating the problem of unstable air volume caused by wind pressure fluctuations in the ventilation system.

[0027] Furthermore, a humidifier is installed on the air supply pipe 1, and the control end of the humidifier is connected to the controller 9. For some dry areas, there is a need for humidification when the fresh air is running. At this time, the corresponding humidifier can be controlled to open, thereby increasing the indoor humidity.

[0028] Furthermore, the indoor humidity control device further includes a display and a temperature sensor 19 installed indoors, the signal output ends of the temperature sensor 19 and the humidity sensor 18 are connected to the display, and the control end of the display is connected to the controller 9. The display is provided with an indoor control panel 17, and the indoor control panel 17 is provided with a temperature adjustment button and a humidity adjustment button. The user can adjust the indoor temperature and humidity through the temperature adjustment button and the humidity adjustment button.

[0029] Furthermore, an auxiliary heating device is installed inside the air supply pipe 1. The auxiliary heating device heats the air to evaporate the moisture in the air so as to reduce the humidity in the air. The dehumidification efficiency can be improved by cooperating with the auxiliary heating device and the dehumidification device 2.

[0030] The working process of the indoor humidity control device is as follows: fresh air is dehumidified in the dehumidification device 2 through the air supply pipe 1 and sent into the indoor space to dehumidify the indoor space. The cold / hot water of the air conditioning system flows to the fan coil 14 to exchange heat with the air in the indoor space, remove the indoor sensible heat, and ensure temperature control. The humidity sensor 18 and the temperature sensor 19 can measure the indoor air temperature and humidity. The display screen 16 can display the current measured indoor temperature and humidity values. The user can adjust the temperature setting value through the display screen 16. The indoor control panel 17 can transmit the temperature and humidity measurement values ​​and the temperature setting values ​​to the controller 9 (9 programmable controllers) through the signal line. The controller 9 calculates the deviation between the current humidity measurement value and the internal setting value to obtain the required fresh air volume. The Pitot tube 3 measures the wind pressure, and transmits the dynamic pressure and static pressure to the air volume transmitter 7 through the pressure pipe 6. The air volume transmitter 7 outputs the actual measured air volume value in the air duct to the controller 9. The controller 9 calculates the deviation between the actual measured air volume value and the required fresh air volume, adjusts the opening of the air valve 4, so that the measured air volume matches the required fresh air volume, completes the humidity control and is not affected by the pressure fluctuation of the wind system. The controller 9 monitors the opening of the air valve 4. If the opening of the air valve 4 is greater than 95%, it indicates that the current air volume is insufficient, and a signal is output to the dehumidifier 2 to increase the internal fan speed. If the opening of the air valve 4 is less than 75%, it indicates that the current air volume is sufficient, and a signal is output to the dehumidifier 2 to reduce the internal fan speed, thereby realizing the variable frequency control of the air volume of the dehumidifier 2. The above functions and logics can be connected to the controller 9 through the computer 10, and can be set, edited and debugged on the interface of the computer 10, such as setting the required indoor humidity value, and also setting the maximum flow value of the electric water valve 12, performing terminal current limiting, and solving the overcurrent problem.

[0031] Furthermore, it also includes a carbon dioxide sensor 21 installed on the indoor exhaust duct. The carbon dioxide sensor 21 can monitor the indoor carbon dioxide concentration and the volatile organic compound concentration. The sensor is directly interlocked with the controller 9. When the indoor carbon dioxide or volatile organic compound concentration exceeds the standard, the controller 9 will give priority to opening the fresh air valve to the maximum to reduce the indoor dangerous gas concentration to a reasonable standard.

[0032] The indoor humidity control device proposed in this embodiment has a dehumidification device 2 and a matching air valve 4 in the air supply pipe 1 of the fresh air system, so the opening of the air valve 4 can be adjusted manually or electrically, and the air supply of the fresh air system can be dehumidified by the dehumidification device 2, thereby achieving the purpose of adjusting the indoor humidity. At the same time, the indoor humidity control device has the advantages of compact structure, stable and reliable operation, and easy implementation.

[0033] The utility model further provides a fresh air system.

[0034] In this preferred embodiment, a fresh air system includes an indoor humidity control device of the fresh air system, and also includes a fan coil 14 installed indoors, the fan coil 14 is connected to the circulating water system of the air conditioning system to cool or heat the room, and the fan coil 14 is connected to the circulating water system through an electric water valve 12 with an electric actuator. The specific structure and beneficial effects of the indoor humidity control device refer to the above embodiment and will not be repeated here.

[0035] The pressure-independent electric water valve 12 is used to replace the traditional electric two-way valve to accurately control the water volume of the fan coil unit, which can prevent over-flow, increase the temperature difference between supply and return water, and solve the core problem of energy waste in the water system.

[0036] Furthermore, a flow meter 13 is installed between the circulating water inlet of the fan coil unit 14 and the electric water valve 12, so as to facilitate understanding of the current flow rate.

[0037] The controller 9 calculates the deviation between the temperature measurement value and the user set value, converts it into the required cold / hot water volume, and transmits it to the intelligent water valve composed of the electric water valve 12 and the flow meter 13 through the signal line. The electric water valve 12 compares and calculates the actual water volume measured by the flow meter 13 with the required water volume, adjusts the opening of the water valve to match the two, completes the indoor temperature control, and is not affected by the pressure fluctuation of the water system.

[0038] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An indoor humidity control device for a fresh air system, characterized in that: It includes a dehumidification device, an air valve, a Pitot tube and a humidity sensor, wherein an air valve is installed at the outlet of the air supply duct of the fresh air system, the dehumidification device is installed inside the air supply duct, a Pitot tube is installed between the dehumidification device and the air valve, and the humidity sensor is installed indoors.

2. The indoor humidity control device according to claim 1, characterized in that: An air supply fan is also installed inside the air supply duct, and the air supply fan is a variable frequency fan.

3. The indoor humidity control device according to claim 1, characterized in that: The device also includes a controller which is connected to the signal input terminal of the humidity sensor.

4. The indoor humidity control device according to claim 3, characterized in that: A pressure pipe is installed at the outlet of the Pitot tube, the pressure pipe is connected to the air volume transmitter, and the signal output end of the air volume transmitter is connected to the controller.

5. The indoor humidity control device according to claim 3, characterized in that: A humidifier and a carbon dioxide sensor are also installed on the air supply duct, and the control ends of the humidifier and the carbon dioxide sensor are connected to the controller.

6. The indoor humidity control device according to claim 1, characterized in that: It also includes a display and a temperature sensor installed indoors. The signal output ends of the temperature sensor and the humidity sensor are both connected to the display, and the control end of the display is connected to the controller.

7. The indoor humidity control device according to claim 6, characterized in that: The display is provided with an indoor control panel, and the indoor control panel is provided with a temperature adjustment button and a humidity adjustment button.

8. The indoor humidity control device according to any one of claims 1 to 7, characterized in that: An auxiliary heating device is also installed inside the air supply duct.

9. A fresh air system, characterized in that: An indoor humidity regulating device comprising a fresh air system as described in any one of claims 1 to 8, and also comprising a fan coil installed indoors, the fan coil being connected to a circulating water system of an air-conditioning system to cool or heat the indoor space, the fan coil being connected to the circulating water system via an electric water valve with an electric actuator.

10. The fresh air system according to claim 9, characterized in that: A flow meter is also installed between the circulating water inlet of the fan coil unit and the electric water valve.

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