CN218348827U

CN218348827U - Control system for active chilled beam

Info

Publication number: CN218348827U
Application number: CN202222096697.XU
Authority: CN
Inventors: 方金; 周敏钊; 何雁; 文雪新
Original assignee: Hong Kong Huayi Design Consultants Shenzhen Ltd
Current assignee: Hong Kong Huayi Design Consultants Shenzhen Ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2023-01-20
Anticipated expiration: 2032-08-10

Abstract

The utility model discloses a control system for active chilled beam belongs to the warm logical and building electrical technology field of building, including a plurality of active chilled beam ends, connect the air-conditioning blast pipe on a plurality of active chilled beam ends and install in the air conditioning unit that the terminal one end of active chilled beam was kept away from to the air-conditioning blast pipe, every install chilled beam system DDC controller on the active chilled beam end, the air-conditioning blast pipe is close to every active chilled beam end and all installs the electric switch valve, the electric switch valve is connected with chilled beam system DDC controller and is inserted the BA system, install pressure sensor on the air-conditioning blast pipe, pressure sensor is used for detecting the static pressure change that the air-conditioning blast pipe decided the static pressure point, pressure sensor and air conditioning unit electric connection. The control system for the active chilled beam realizes frequency conversion control and cooling capacity control of the air conditioning unit, thereby achieving the purposes of cooling as required and energy-saving operation.

Description

Control system for active chilled beam

Technical Field

The utility model belongs to the technical field of the warm logical and building electrical technology of building, especially, relate to a control system for active chilled beam.

Background

With the continuous development of heating ventilation air conditioning technology, the form of the tail end of an air conditioner is gradually increased, in recent years, the national attention on zero carbon and green buildings is continuously increased, the requirement of users on the energy conservation performance of the tail end of the air conditioner is higher and higher, the active cold beam is applied to new projects more and more due to the advantages of weak blowing sense, uniform temperature distribution, low equipment noise, more comfortable air supply temperature and the like, the active cold beam is composed of an air conditioner air supply system and the tail end of the cold beam together, an electric two-way switch valve is arranged on an air conditioner freezing water pipe at the tail end of the cold beam, and equipment can be switched on and off according to the use requirements of the users.

In the process of implementing the present invention, the inventor finds that there are at least the following problems in this technology: the conventional air-conditioning air supply system has no control measures, no matter whether a terminal user has a demand for an air conditioner, the air-conditioning unit is always in a maximum air volume air supply state, the air-conditioning unit is always in a power frequency state for running, and the cooling capacity of the air-conditioning unit is also always in a maximum state.

To this end, we propose a control system for an active chilled beam that solves the above mentioned problems.

SUMMERY OF THE UTILITY MODEL

A primary objective of the utility model is to provide a control system for active chilled beam can make the user control air conditioner air supply system according to the user demand to control air conditioning unit through end user's actual amount of wind demand change and carry out the adjustment of frequency conversion operation and cooling capacity, thereby reach the purpose of cooling, energy-conserving operation as required, can effectively solve the problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a control system for active chilled beams comprises a plurality of active chilled beam tail ends, air-conditioning air supply pipes connected to the active chilled beam tail ends and an air-conditioning unit arranged at one ends, far away from the active chilled beam tail ends, of the air-conditioning air supply pipes, wherein a chilled beam system DDC (direct digital control) controller is arranged at the tail ends of the active chilled beams, an electric switch valve is arranged at the tail end, close to each active chilled beam, of each air-conditioning air supply pipe, and the electric switch valve and the chilled beam system DDC controller are connected and connected into a BA system;

the air conditioner air supply pipe is provided with a pressure sensor, the pressure sensor is used for detecting static pressure change of a fixed static pressure point of the air conditioner air supply pipe, and the pressure sensor is electrically connected with the air conditioner unit;

temperature sensor is installed to air conditioning unit's air-out department, just air conditioning unit below is connected with chilled water delivery pipe and chilled water wet return, just be equipped with electrical control valve on the chilled water wet return, electrical control valve and temperature sensor electric connection.

Preferably, the pressure sensor is arranged at 2/3 of one end of the air-conditioning air supply pipe, which is far away from the air-conditioning unit.

Preferably, the air supply temperature of the air conditioning unit is a constant value.

To sum up, the utility model discloses a technological effect and advantage:

this a control system for active chilled beam mainly comprises electric switch valve, pressure sensor, temperature sensor, air conditioning unit fan frequency conversion controller and the air conditioner refrigerated water electrical control valve on the air conditioning blast pipe, controls the air conditioning air supply system of active chilled beam according to the in-service use demand through the user, realizes air conditioning unit's frequency conversion control and cooling capacity control to reach the purpose of cooling as required, energy-conserving operation.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1. an active cold beam end; 2. an electrically operated on-off valve; 3. a cold beam system DDC controller; 4. an air conditioning blast pipe; 5. a pressure sensor; 6. a temperature sensor; 7. an air conditioning unit; 8. a fan variable frequency controller; 9. a chilled water supply pipe; 10. a chilled water return pipe; 11. an electric control valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, a control system for active chilled beams includes a plurality of active chilled beam tail ends 1, air-conditioning blast pipes 4 connected to the active chilled beam tail ends 1, and an air-conditioning unit 7 installed at one end of the air-conditioning blast pipes 4 far away from the active chilled beam tail ends 1, in the drawing, the middle active chilled beam tail ends 1 are replaced by ellipses, only two active chilled beam tail ends 1 are expressed, actually a plurality of active chilled beam tail ends are installed, a chilled beam system DDC controller 3 is installed on each active chilled beam tail end 1, an electric switch valve 2 is installed on each air-conditioning blast pipe 4 close to each active chilled beam tail end 1, and the electric switch valves 2 and the chilled beam system DDC controller 3 are connected to a BA system; the electric switch valve 2 can be opened and closed locally, or can be opened and closed remotely and automatically through a BA system, which is not shown in the drawing but is prior art;

the frequency conversion control of the air conditioning unit 7 is realized by a fixed static pressure method: the air conditioning air supply pipe 4 is provided with a pressure sensor 5, the type of the pressure sensor 5 can be selected to CYYZ11, the pressure sensor 5 is arranged at 2/3 of the position of the air conditioning air supply pipe 4 from a fan to the end 1 of the farthest active chilled beam, when an electric switch valve 2 in the system is opened or closed, static pressure change of a fixed static pressure point of the air conditioning air supply pipe 4 can be caused, the static pressure change is detected by the pressure sensor 5, the pressure sensor 5 is electrically connected with the air conditioning unit 7, when the actually measured static pressure value of the fixed static pressure point is lower than a set value, a fan variable frequency controller 8 of the air conditioning unit 7 controls the fan to increase the operation frequency and increase the air supply quantity of the air conditioning unit 7, and when the actually measured static pressure value of the fixed static pressure point is higher than the set value, the fan variable frequency controller 8 of the air conditioning unit 7 controls the fan to decrease the operation frequency and reduce the air supply quantity of the air conditioning unit 7.

The control of the cooling capacity of the air conditioning unit 7 for supplying air to the active chilled beam is realized by the following method: setting the air supply temperature of an air conditioning unit 7 as a fixed value, installing a temperature sensor 6 at the air outlet of the air conditioning unit 7, wherein the type of the temperature sensor 6 can be pt100, a chilled water supply pipe 9 and a chilled water return pipe 10 are connected below the air conditioning unit 7, an electric regulating valve 11 is arranged on the chilled water return pipe 10, the electric regulating valve 11 is linked according to the air supply temperature measured by the temperature sensor 6, namely, the electric regulating valve 11 is electrically connected with the temperature sensor 6, when the air conditioning unit 7 operates in a frequency reduction mode, the air supply quantity is reduced, the air supply temperature is lowered and is lower than the set air supply temperature, at the moment, the electric regulating valve 11 on the chilled water return pipe 10 is adjusted to be small, the cold supply quantity of the air conditioning unit 7 is reduced, the air supply temperature is raised to a set value, when the air conditioning unit 7 operates in a frequency increase mode, the air supply quantity is increased and the air supply temperature is higher than the set air supply temperature, at the moment, the electric regulating valve 11 on the chilled water return pipe 10 is opened to be large, the air conditioning unit 7 is increased, and the air supply quantity is reduced to the set value;

when a user served by the tail end 1 of one active chilled beam does not need cooling, the air supply pipe 4 of the air conditioner connected with the tail end 1 of the active chilled beam can be closed through local control, remote control and automatic control, the linkage air conditioning unit 7 performs variable frequency operation to reduce the air supply quantity of the unit, and meanwhile, the electric regulating valve 11 on the chilled water return pipe 10 of the linkage air conditioner is closed to reduce the chilled water flow so as to reduce the cooling capacity;

when a user served by a closed active chilled beam tail end 1 needs cooling, an air conditioning air supply pipe 4 connected with the active chilled beam tail end 1 can be opened through local control, remote control and automatic control, and is linked with an air conditioning unit 7 to perform variable frequency operation, so that the air supply quantity of the unit is increased, and meanwhile, an electric regulating valve 11 on a chilled water return pipe 10 of the linked air conditioner is opened to increase the chilled water flow, so that the cooling capacity is increased.

The functions can improve the problem that the air supply quantity of the existing active chilled beam system air conditioner and the air supply quantity of the air conditioning unit cannot be adjusted, can realize the control of the air supply quantity of the active chilled beam air conditioner according to the requirements of end users, and achieves the purposes of cooling according to the requirements and energy-saving operation.

The working principle is as follows: when a cold beam system DDC controller 3 at the tail end 1 of a certain active cold beam receives a signal for stopping equipment cold supply, an electric switch valve 2 of an air-conditioning air supply pipe 4 is linked to be closed, after the electric switch valve 2 is closed, the static pressure value of a fixed static pressure point in the air-conditioning air supply pipe 4 is increased and is higher than the static pressure set value of a static pressure monitoring point, a pressure sensor 5 arranged in the air-conditioning air supply pipe 4 monitors the change of the static pressure value, the electric switch valve 2 is linked with a fan variable-frequency controller 8 of a fan in an air-conditioning unit 7 to reduce the running frequency of the fan, so that the static pressure value of the static pressure monitoring point is recovered to the static pressure set value, the air supply amount is reduced, when the air supply amount is reduced and the cold supply amount is not changed, the air supply temperature is reduced and is lower than the original air supply temperature set value, and when a temperature sensor 6 arranged near an air outlet of the air-conditioning unit 7 monitors that the actual air supply temperature is lower than the set value, an electric control valve opening is linked to be reduced, the flow rate of chilled water is reduced, and the cold supply amount is reduced until the air supply temperature reaches the set value.

When a chilled beam system DDC controller 3 at the tail end 1 of a closed active chilled beam receives a signal that equipment starts to supply cold, an electric switch valve 2 of an air-conditioning air supply pipe 4 is opened, after the electric switch valve 2 is opened, the static pressure value of a static pressure monitoring point in the air-conditioning air supply pipe 4 is reduced and is lower than a static pressure set value, a pressure sensor 5 arranged in the air-conditioning air supply pipe 4 monitors the change of the static pressure value, a fan frequency conversion controller 8 of a fan inside an air-conditioning unit 7 is linked, the running frequency of the fan is increased, the static pressure value of the static pressure monitoring point is recovered to the static pressure set value, the air supply quantity is increased, when the air supply quantity is increased and the cold supply quantity is not changed, the air supply temperature is increased and is higher than the original air supply temperature set value, when a temperature sensor 6 arranged near an air outlet of the air-conditioning unit 7 monitors that the actual air supply temperature is higher than a water return value, an electric control valve 11 arranged on a chilled water pipe 10 is linked, the opening degree is increased, and the cold supply quantity is increased until the air supply temperature reaches the set value.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The control system for the active chilled beams comprises a plurality of active chilled beam tail ends (1), air-conditioning air supply pipes (4) connected to the active chilled beam tail ends (1) and an air-conditioning unit (7) installed at one ends, far away from the active chilled beam tail ends (1), of the air-conditioning air supply pipes (4), and is characterized in that a chilled beam system DDC (direct digital control) controller (3) is installed on each active chilled beam tail end (1), an electric switch valve (2) is installed on each air-conditioning air supply pipe (4) close to each active chilled beam tail end (1), and the electric switch valve (2) is connected with the chilled beam system DDC controller (3) and connected into a BA system;

the air-conditioning air supply pipe (4) is provided with a pressure sensor (5), the pressure sensor (5) is used for detecting static pressure change of a fixed static pressure point of the air-conditioning air supply pipe (4), and the pressure sensor (5) is electrically connected with an air-conditioning unit (7);

temperature sensor (6) are installed to the air-out department of air conditioning unit (7), just air conditioning unit (7) below is connected with refrigerated water delivery pipe (9) and refrigerated water wet return (10), just be equipped with electric control valve (11) on refrigerated water wet return (10), electric control valve (11) and temperature sensor (6) electric connection.

2. A control system for an active chilled beam according to claim 1, characterized in that the pressure sensor (5) is placed at 2/3 of the end of the air conditioning supply pipe (4) away from the air conditioning unit (7).

3. A control system for an active chilled beam according to claim 1, characterized in that the supply air temperature of the air conditioning unit (7) is constant.