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Fan coil temperature control device based on pipe diameter matching relation between fan coil and water pipe and controlled by return air temperature and air supply volume

A technology of temperature control device and fan coil unit, applied in heating and ventilation control system, control input involving air characteristics, space heating and ventilation control input, etc. The temperature difference rises and falls suddenly, etc., to achieve the effect of good energy saving, improved stability, and accurate adjustment of water pipe flow.

Inactive Publication Date: 2016-05-18
GUANGZHOU DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the resistance of the waterway in the existing fan coil unit structure and the water heat exchange temperature difference of the end branch fluctuate up and down, which affects the control stability of the entire chilled water system, and provides a method based on and Water pipe diameter matching and fan coil temperature control device controlled by return air temperature and air supply volume. This device further sets the electric water valve by controlling the maximum opening of the electric water valve and according to the deviation between the indoor temperature and the set temperature. It has the characteristics of accurately adjusting the flow rate of the fan coil water pipe and improving the stability of the chilled water system

Method used

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  • Fan coil temperature control device based on pipe diameter matching relation between fan coil and water pipe and controlled by return air temperature and air supply volume
  • Fan coil temperature control device based on pipe diameter matching relation between fan coil and water pipe and controlled by return air temperature and air supply volume
  • Fan coil temperature control device based on pipe diameter matching relation between fan coil and water pipe and controlled by return air temperature and air supply volume

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Effect test

specific Embodiment 1

[0032] Reference figure 1 with figure 2 This embodiment includes a fan coil 1, an electric water valve 2, a controller 3, and a control panel 4. A fan is provided in the fan coil 1; the electric water valve 2 is installed at the water inlet end of the fan coil 1. The model of 1 is matched with the diameter of the water pipe to control the maximum opening of the electric water valve 2. The controller 3 controls the opening of the electric water valve 2 to adjust within the opening limit; the composition is based on the fan coil 1 and the water pipe The temperature control structure of the fan coil 1 with diameter matching and automatic adjustment of the opening of the electric water valve 2; the control panel 4 has several control signal output terminals and feedback signal input terminals, and the control signal output terminal of the control panel 4 is connected to the control signal of the controller 3 At the input end, the feedback signal input end of the control panel 4 is...

specific Embodiment 2

[0065] The characteristic of this embodiment is that the model of fan coil 1 is FC400, the cooling capacity is 3290W, the heat is 4530W, and the maximum air volume of the fan is 680m at the mid-range air volume. 3 / h, the design temperature difference between supply and return water is 5 degrees; the indoor temperature setting value is 25 degrees. The diameter of the water pipe connected to the fan coil is DN30.

[0066] X1 value table

[0067] Water pipe diameter (mm)

Water valve opening limit (%)

≤DN20

100

DN20-DN40

80

>DN40

60

[0068] The data matching of the diameter of the fan coil and the water pipe in the table refers to the setting in this embodiment: when the diameter of the water pipe connected to the fan coil 1 is 1 inch or less, the opening limit of the electric water valve 2 It can reach 100% of the water valve opening; when the diameter of the water pipe connected to the fan coil 1 is 1 inch or more but less than or equal to 1 inch and a half, the opening...

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Abstract

The invention relates to a fan coil temperature control device based on the pipe diameter matching relation between a fan coil and a water pipe and controlled by the return air temperature and the air supply volume. The fan coil temperature control device comprises the fan coil, an electric water valve, a controller and a control panel. A draught fan is arranged in the fan coil. The fan coil temperature control device is characterized in that the electric water valve is installed at the water inlet end of the fan coil; the model of the fan coil is matched with the pipe diameter of the water pipe so that the maximum limitation of the opening degree of the electric water valve can be controlled; the controller controls the opening degree of the electric water valve to be adjusted within the opening degree limiting range; a fan coil temperature control structure for automatically regulating the opening degree of the electric water valve according to the pipe diameter matching relation between the fan coil and the water pipe is formed; the control panel comprises multiple control signal output ends and feedback signal input ends, and a structure for automatically regulating the rotating speed of the draught fan and the opening degree of the electric water valve according to the return air temperature and the air supply volume is formed; and the model of the fan coil is FC800, or the model of the fan coil is FC400. According to the fan coil temperature control device, the maximum limitation of the opening degree of the eclectic water valve is controlled by the controller according to the pipe diameter matching relation between the fan coil and the water pipe, and the beneficial effects that the flow of the water pipe of the fan coil is accurately regulated and the stability of a chilled water system is improved are achieved.

Description

Technical field [0001] The invention relates to a fan coil temperature control device based on matching with water pipe diameter and controlled by return air temperature and air supply volume. It belongs to the technical field of HVAC. Background technique [0002] The fan coil is the end product of the central air conditioner. It is composed of heat exchanger, water pipe, filter, fan, drain pan, exhaust valve and bracket. Its working principle is to continuously recirculate the air in the room in the unit to make The air is cooled (heated) after passing through the cold water (hot water) coil to keep the room temperature constant. [0003] With the continuous development of fan coil technology, the field of application has also become larger, and it is mainly used in offices, hospitals, scientific research institutions and other places. The fan coil unit mainly relies on the forced action of the fan to achieve the desired effect through the action of the surface cooler. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F1/00F24F11/02
CPCF24F1/0007F24F11/30F24F11/77F24F11/83F24F11/84F24F11/89F24F2110/00F24F2110/10F24F2110/30Y02B30/70
Inventor 屈国伦何恒钊
Owner GUANGZHOU DESIGN INST
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