CN-118082903-B - Air conditioner monitoring system and method for preventing air grid from condensation

CN118082903BCN 118082903 BCN118082903 BCN 118082903BCN-118082903-B

Abstract

The invention provides an air conditioner monitoring system and method for preventing air outlet grating condensation, wherein the system is based on a nonmetal grating with a low heat transfer coefficient, a first temperature monitoring module is arranged at the air outlet grating to acquire the real-time air outlet temperature of an air conditioner system, a second temperature monitoring module is arranged in a carriage to acquire the temperature data in the carriage to represent the environmental temperature of a user; and the air conditioner operation control module is utilized to synthesize real-time air conditioner air outlet temperature and user environment temperature data, and the operation parameters of the vehicle air conditioning system are adjusted so that the in-vehicle refrigeration effect meets the set target comfort requirement. The scheme solves the problems that the condensation is not thoroughly prevented and the refrigeration of an air conditioner is influenced in the existing condensation optimization technology, comprehensively considers two points of an air outlet grating material and an air conditioner control strategy, takes the air outlet temperature and the environment temperature in the vehicle as comprehensive targets, and does not influence the refrigeration effect of the air conditioner in the vehicle on the basis of effectively preventing condensation.

Inventors

LI JUNYI
ZHANG CHENLIN
YANG YONG
LI JING
ZHOU CHENGMING
CHEN YALI
KONG FANPENG
YAO SHIXIAN

Assignees

湖南中车智行科技有限公司

Dates

Publication Date: 20260505
Application Date: 20221128

Claims (5)

1. An air conditioner monitoring system for preventing air grid condensation, the system comprising: a nonmetallic grille disposed at one or more air outlets of the vehicle air conditioning system; The first temperature monitoring module is arranged at a set position of the nonmetal grating and used for acquiring the real-time air outlet temperature of the air conditioning system; the second temperature monitoring module is arranged at a carriage space set position and is used for acquiring carriage temperature data to represent the user environment temperature; The air conditioner operation control module is in communication connection with the first temperature monitoring module and the second temperature monitoring module and is configured to synthesize real-time air conditioner air outlet temperature and user environment temperature data, and the operation parameters of the vehicle air conditioning system are adjusted so that the in-vehicle refrigeration effect meets the set target comfort requirement; The air conditioner operation control module is configured to calculate a difference value between the user environment temperature and a preset target environment temperature as a regulation index, and regulate and control the operation parameters of the vehicle air conditioning system according to the regulation index value and a set regulation grade value; The air conditioner operation control module is used for controlling the operation frequency of a compressor and the operation air quantity of a fan of the vehicle air conditioning system according to the comparison result of the regulation and control index value and the set regulation and control grade value and in combination with the constraint control condition of the air outlet temperature of the air conditioner; When the regulation index is more than or equal to 3 ℃, the air conditioner operation control module is configured to regulate the operation parameters of the vehicle air conditioning system according to the following logic: The method comprises the steps that a first level frequency is adopted for initially setting the operation frequency of a compressor, a first level air quantity is adopted for the operation air quantity of a fan, and the first level air quantity is the air quantity of the fan under a rated working condition; when the regulation index is less than or equal to 1 ℃ and less than 3 ℃, the air conditioner operation control module is configured to regulate the operation parameters of the vehicle air conditioning system according to the following logic: Setting the operation frequency of the compressor as a second level frequency, and setting the operation air quantity of the fan as a second level air quantity; Judging whether the temperature of the air outlet meets the set constraint control condition after the interval setting time, if so, keeping the air conditioner to operate according to the current operation parameters, otherwise, adjusting the operation frequency of the compressor to be reduced to the third-level frequency, and keeping the operation air quantity of the fan to be the second-level air quantity; After the time is set, whether the temperature of the air outlet meets the set constraint control condition is further judged, if so, the air conditioner is kept to operate according to the current operation parameters, otherwise, the operation frequency of the compressor is adjusted to be reduced to the fourth-level frequency, and the operation air quantity of the fan is still the second-level air quantity; After the time is set, whether the temperature of the air outlet meets the set constraint control condition is further judged, if so, the air conditioner is kept to operate according to the current operation parameters, otherwise, the operation frequency of the compressor is controlled to be fourth-level frequency, and the operation air quantity of the fan is controlled to be first-level air quantity.
2. The system of claim 1, wherein the exit grid is a non-metallic material having a heat transfer coefficient of 0.06W/m 2 K or less.
3. The system of claim 1, wherein the constraint control condition of the air-conditioning outlet temperature is set to be that the air-conditioning outlet temperature is more than 1 degree higher than the rated air-conditioning outlet temperature under the refrigeration condition.
4. The system of claim 1, wherein when-1 ℃ is less than or equal to a regulation index <1 ℃, the air conditioning operation control module is configured to regulate the operating parameters of the vehicle air conditioning system according to the following logic: setting the operation frequency of the compressor as fourth-level frequency, and setting the operation air quantity of the fan as third-level air quantity; Judging whether the temperature of the air outlet meets the set constraint control condition after the interval setting time, if so, keeping the air conditioner to operate according to the current operation parameters, otherwise, adjusting the operation frequency of the compressor to adopt fourth-level frequency, and adjusting the operation air quantity of the fan to be higher than second-level air quantity; And further judging whether the temperature of the air outlet meets the set constraint control condition after the time is set, if so, keeping the air conditioner to operate according to the current operation parameters, otherwise, controlling the operation frequency of the compressor to adopt fourth-level frequency, and adjusting the operation air quantity of the fan to be the first-level air quantity.
5. An air conditioner monitoring method for preventing air grid condensation, which is characterized by being realized based on the system of any one of claims 1-4, and comprising the following steps: A temperature monitoring setting step, setting a first temperature monitoring module at a set position of a nonmetallic grille, and setting a second temperature monitoring module at a set position of a carriage space, wherein the first temperature monitoring module and the second temperature monitoring module are respectively used for acquiring real-time air outlet temperature data and user environment temperature data of an air conditioning system; an air conditioner operation control step, wherein an air conditioner operation control module synthesizes the values of the air outlet temperature of the air conditioner and the environmental temperature of a user in real time, and adjusts the operation parameters of a vehicle air conditioning system so as to enable the refrigeration effect in the vehicle to meet the set target comfort requirement; in the air conditioner operation control step, the air conditioner operation control module adjusts the operation parameters of the vehicle air conditioning system according to the following strategy: And calculating a difference value between the user environment temperature and a preset target environment temperature as a regulation and control index, and regulating and controlling the operation parameters of the vehicle air conditioning system according to a comparison result of the regulation and control index value and a set regulation and control grade value and in combination with the constraint control condition of the air conditioner air outlet temperature.

Description

Air conditioner monitoring system and method for preventing air grid from condensation Technical Field The invention relates to the technical field of public transportation equipment optimization control, in particular to an air conditioner monitoring system and method for preventing air grid condensation. Background In an air conditioner and a ventilation system of an urban rail transit vehicle, in order to improve the air outlet quality and adjustability of a space, air treated by the air conditioner is generally blown to the space in the vehicle through an air outlet grille. The air outlet grating is generally composed of one or more groups of parallel grating bars, and the grating bars are generally provided with a certain inclination angle, as shown in figure 1, because the grating bars are complex in shape and have certain requirements on the strength and rigidity of the grating bars, particularly in rail transit vehicles, shake and fluctuation are unavoidable, the toughness of materials also needs to meet certain requirements, and the rail transit air conditioning system is basically made of aluminum alloy materials at present; when the air outlet temperature of the air conditioner is very low, the heat transfer coefficient of the aluminum alloy is 150-200W/K, and the temperature of the aluminum alloy is equivalent to the air outlet temperature because the heat transfer coefficient of the air outlet grating of the aluminum alloy material is higher. In the actual application process of urban rail vehicles, the doors are required to be frequently opened and closed, particularly in a refrigerating mode, when hot and humid air meets an aluminum alloy air outlet grille with lower temperature, the hot and humid air meets an object reaching an air dew point, and the air dew point comparison table is shown in fig. 2, so that condensation can occur on the grille, the service life of air grille equipment can be influenced, meanwhile, the humidity of the environment in the vehicle is interfered, and the riding experience of passengers is influenced. In addition, in some technical schemes, the indoor temperature is higher than the dew point temperature at any time by directly controlling the operation of the air conditioner so as to avoid the dew point phenomenon, and the refrigerating effect of the air conditioner in the vehicle is obviously limited, so that good somatosensory temperature cannot be brought to passengers and the temperature is reduced. The information disclosed in the background section of the invention is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. Disclosure of Invention To solve the above problems, the present invention provides an air conditioner monitoring system for preventing air grid condensation, in one embodiment, the method includes: a nonmetallic grille disposed at one or more air outlets of the vehicle air conditioning system; The first temperature monitoring module is arranged at a set position of the nonmetal grating and used for acquiring the real-time air outlet temperature of the air conditioning system; the second temperature monitoring module is arranged at a carriage space set position and is used for acquiring carriage temperature data to represent the user environment temperature; And the air conditioner operation control module is in communication connection with the first temperature monitoring module and the second temperature monitoring module and is configured to synthesize the real-time air conditioner air outlet temperature and the user environment temperature, and the operation parameters of the vehicle air conditioning system are adjusted so that the in-vehicle refrigeration effect meets the set target comfort requirement. Preferably, in one embodiment, the air outlet grating is made of a nonmetallic material with a heat transfer coefficient of less than or equal to 0.06W/m 2 K. Further, in one embodiment, the air conditioner operation control module is configured to calculate a difference between the user environment temperature and a preset target environment temperature as a regulation index, and regulate an operation parameter of the air conditioner system of the vehicle according to the regulation index value and the set regulation grade value. In an optional embodiment, the air conditioner operation control module adjusts and controls the compressor operation frequency and the fan operation air quantity of the vehicle air conditioning system according to the comparison result of the regulation and control index value and the set regulation and control grade value and in combination with the constraint control condition of the air conditioner air outlet temperature. Specifically, in an alternative embodiment, the constraint control condition of the air outlet temper