CN217383139U

CN217383139U - Energy-saving system of fresh air conditioning unit

Info

Publication number: CN217383139U
Application number: CN202123428371.4U
Authority: CN
Inventors: 修立凡
Original assignee: Dalian Yude Technology Co ltd
Current assignee: Dalian Yude Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-09-06
Anticipated expiration: 2031-12-31

Abstract

The utility model belongs to the technical field of warm logical engineering system, a new trend air conditioning unit's economizer system is disclosed. The fresh air valve is connected with an air valve actuator, the air feeder is connected with a differential pressure switch in parallel, the wet film humidifier is respectively connected with a water supplementing pipeline and an electric cabinet, an anti-freezing switch is arranged at the adjacent position of the coil pipe, the coil pipe is respectively connected with a water supply pipeline and a water return pipeline, and an electric regulating valve is arranged on the water return pipeline; the economizer system is also equipped with a DDC controller. Automatic energy-saving control is realized, and the cost is reduced.

Description

Energy-saving system of fresh air conditioning unit

Technical Field

The utility model belongs to the technical field of warm logical engineering system, the utility model relates to a new trend air conditioning unit's economizer system.

Background

The central air conditioner is used in large-scale commercial buildings, office buildings, hospitals, data centers, industrial plants or production workshops and the like, and plays an important role in the modernized buildings and industrial development process. Central air conditioning units for use in different applications are also very different.

However, the existing air conditioning unit is not provided with an energy-saving component, so that the cost is increased, and the energy consumption is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming not enough among the above-mentioned background art, providing a fresh air conditioning unit's economizer system, realizing automatic energy-saving control, reduce cost.

The utility model provides a technical scheme that its technical problem adopted is: an energy-saving system of a fresh air conditioning unit comprises a fresh air inlet end and an air supply end, wherein a channel between the fresh air inlet end and the air supply end is sequentially provided with a fresh air valve, a coil pipe, a wet film humidifier and an air feeder in sequence, the air supply end is arranged at the tail end, the rear end of the air feeder is provided with a temperature sensor and a humidity sensor, the fresh air valve is connected with an air valve actuator, the air feeder is connected with a pressure difference switch in parallel, the wet film humidifier is respectively connected with a water supplementing pipeline and an electric cabinet, the adjacent part of the coil pipe is provided with an anti-freezing switch, the coil pipe is respectively connected with a water supply pipeline and a water return pipeline, and the water return pipeline is provided with an electric regulating valve; the economizer system is also equipped with a DDC controller.

Further, the temperature sensor is used for detecting the temperature of the supplied air; the humidity sensor is used for detecting the air supply humidity.

Furthermore, the air valve actuator, the electric regulating valve and the humidity sensor are respectively connected with a power supply.

Further, the air feeder is also connected with a variable frequency controller; the fresh air valve and the blower are controlled in an interlocking way.

Furthermore, the wet film humidifier is also connected with an electric cabinet.

Furthermore, the air valve actuator, the electric regulating valve, the anti-freezing switch, the electric cabinet, the differential pressure switch, the variable frequency controller, the temperature sensor and the humidity sensor are respectively connected with the DDC controller.

Further, an electric control valve is used to adjust the hot/cold water opening.

Compared with the prior art, the utility model beneficial effect who has is:

the utility model provides a pair of fresh air conditioning unit's economizer system guarantees the indoor air quality, sends to indoorly through the fan after handling such as dust removal, dehumidification (or humidification), cooling (or intensification) through the outdoor fresh air of extraction, replaces indoor original air when getting into indoor space. And the energy-saving structure is adopted, so that the structure is simple and the cost is reduced.

Drawings

The invention is further described below with reference to the following figures and examples:

fig. 1 is the structural schematic diagram of the energy-saving system of the fresh air conditioning unit of the present invention.

Fig. 2 is a schematic diagram of an economizer system control connection.

In the figure, 1, a fresh air inlet end, 2, an air supply end, 3, a fresh air valve, 4, a coil pipe, 5, a wet film humidifier, 6, a blower, 7, a temperature sensor, 8, a humidity sensor, 9, an air valve actuator, 10, an electric regulating valve, 11, an anti-freezing switch, 12, an electric cabinet, 13, a differential pressure switch, 14, a frequency conversion controller, 15, a water return pipeline, 16, a water supply pipeline, 17, a water supplementing pipeline and 18, a power supply are arranged.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following embodiments. In the embodiment, the air valve actuator, the electric regulating valve, the anti-freezing switch, the electric cabinet, the differential pressure switch, the variable frequency controller, the temperature sensor and the humidity sensor which are connected with the DDC controller are not limited to specific models, and the working function of the air valve actuator, the electric regulating valve, the anti-freezing switch, the electric cabinet, the differential pressure switch, the variable frequency controller, the temperature sensor and the humidity sensor is realized.

Example 1

An energy-saving system of a fresh air conditioning unit is shown in fig. 1-2 and comprises a fresh air inlet end 1 and an air supply end 2, wherein a fresh air valve 3, a coil pipe 4, a wet film humidifier 5 and an air feeder 6 are sequentially arranged in a channel between the fresh air inlet end 1 and the air supply end 2, the air supply end 2 is arranged at the tail end, a temperature sensor 7 and a humidity sensor 8 are arranged at the rear end of the air feeder 6, the fresh air valve 3 is connected with an air valve actuator 9, the air feeder 6 is connected with a pressure difference switch 13 in parallel, the wet film humidifier 5 is respectively connected with a water supplementing pipeline 17 and an electric control box 12, an anti-freezing switch 11 is arranged adjacent to the coil pipe 4, the coil pipe 4 is respectively connected with a water supply pipeline 16 and a water return pipeline 15, and the water return pipeline 15 is provided with an electric regulating valve 10; the economizer system is also equipped with a DDC controller.

Further, the temperature sensor 7 is used for detecting the temperature of the supplied air; the humidity sensor 8 is used for detecting the humidity of the supplied air.

Further, the air valve actuator 9, the electric control valve 10 and the humidity sensor 8 are respectively connected with a power supply 18. The electric regulating valve 10 is used for regulating the opening degree of a water channel and feeding back a valve position.

Further, the blower 6 is also connected with a variable frequency controller 14; the fresh air valve 3 and the blower 6 are controlled in an interlocking manner.

Further, the wet film humidifier 5 is further connected with an electric cabinet 12.

Further, the air valve actuator 9, the electric regulating valve 10, the anti-freezing switch 11, the electric cabinet 12, the differential pressure switch 13, the variable frequency controller 14, the temperature sensor 7 and the humidity sensor 8 are respectively connected with the DDC controller.

The system unit works and starts and stops at fixed time; starting and stopping the system unit at regular time according to a preset work and holiday work and rest schedule, automatically counting the running time of the system unit, and prompting regular maintenance; according to the water amount of the air supply temperature sensor 7, the humidity sensor 8 and the adjusting coil 4 (surface cooling/heating section); the parallel differential pressure switches 13 arranged in front of and behind the blower 6 are used for differential pressure monitoring and used for monitoring the fault state of the blower 6 of the unit; the anti-freezing switch 11 gives an alarm and stops.

The fresh air valve 3 is opened and closed in interlock with the blower 6, and the water path electric control valve 10(SV-1) and the wet film humidifier 5 are also closed after the blower 6 is stopped. Wherein, in winter, the waterway electric regulating valve 10 is opened before the blower 6 and the fresh air valve 3, and then closed after the blower 6 and the fresh air valve 3.

In winter, when the temperature behind the coil 4 is lower than 5 degrees centigrade (the temperature of the coil 4 is monitored by the temperature sensor arranged on the anti-freezing switch 11), the anti-freezing switch 11 gives an alarm, the air feeder 6 is automatically stopped, the fresh air valve 3(FV-1) is interlocked and closed, the hot water electric regulating valve 10(SV-1) is fully opened, and meanwhile, an audible and visual alarm is given in a central control room.

Working conditions in summer (winter) season: (1) the DDC frequency conversion controller adjusts the opening degree of the electric adjusting valve 10 (hot/cold water) according to the difference value of the air supply temperature and the set value, so that the air supply temperature is kept constant (generally, the maximum air supply temperature difference, namely, the air supply temperature under the designed working condition). (2) In winter, the electric control valve 10 should be kept at a minimum opening of 10% to prevent freezing.

Fresh air quantity variable frequency control: (1) when the working condition is in a transition season, the operation frequency of the blower 6 is adjusted according to the indoor and outdoor enthalpy values; (2) the air conditioning season (winter and summer) is based on the minimum fresh air quantity requirement, and the running frequency of the blower 6 is limited.

And (4) blocking alarm: when the pressure difference between the two ends of the blower 6 is increased to a limit value (namely, twice the initial resistance value), an alarm is automatically given to prompt replacement or cleaning.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of this invention without departing from the spirit thereof.

Claims

1. An energy-saving system of a fresh air conditioning unit is characterized by comprising a fresh air inlet end (1) and an air supply end (2), wherein a channel between the fresh air inlet end (1) and the air supply end (2) is sequentially provided with a fresh air valve (3), a coil (4), a wet film humidifier (5) and an air feeder (6), the air supply end (2) is arranged at the tail end, the rear end of the air feeder (6) is provided with a temperature sensor (7) and a humidity sensor (8), the fresh air valve (3) is connected with an air valve actuator (9), the air feeder (6) is connected with a pressure difference switch (13) in parallel, the wet film humidifier (5) is respectively connected with a water supplementing pipeline (17) and an electric cabinet (12), an anti-freezing switch (11) is arranged at the adjacent position of the coil pipe (4), the coil pipe (4) is respectively connected with a water supply pipeline (16) and a water return pipeline (15), and an electric regulating valve (10) is arranged on the water return pipeline (15); the economizer system is also equipped with a DDC controller.

2. The energy-saving system of the fresh air conditioning unit as claimed in claim 1, wherein the air valve actuator (9), the electric control valve (10) and the humidity sensor (8) are respectively connected with a power supply (18).

3. The energy-saving system of the fresh air conditioning unit as claimed in claim 2, wherein the blower (6) is further connected with a variable frequency controller (14).

4. The energy-saving system of the fresh air conditioning unit as claimed in claim 3, wherein the wet film humidifier (5) is further connected with an electric cabinet (12).

5. The energy saving system of the fresh air conditioning unit according to claim 4, wherein the air valve actuator (9), the electric control valve (10), the anti-freezing switch (11), the electric cabinet (12), the differential pressure switch (13), the variable frequency controller (14), the temperature sensor (7), and the humidity sensor (8) are respectively connected to the DDC controller.