CN111238003B

CN111238003B - Control method of temperature adjusting unit

Info

Publication number: CN111238003B
Application number: CN202010197741.9A
Authority: CN
Inventors: 秦燕山; 丁希曙; 韩勇; 侯书铭
Original assignee: Hefei Fenglan Electrical Appliance Co ltd
Current assignee: Hefei Fenglan Electrical Appliance Co ltd
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2021-05-18
Anticipated expiration: 2040-03-19
Also published as: CN111238003A

Abstract

The invention discloses a control method of a temperature regulating unit, and relates to the technical field of temperature regulating units. The invention comprises the following steps: selecting a weak current control part or a strong current control part; if the weak current control part is selected, executing the step two; if the strong electric control part is selected, executing the step three; step two, pressing a switch key, starting the equipment to be electrified, enabling the electric control board to enter a standby state, starting the circulating fan M3 to work, enabling the unit to enter an automatic mode, and setting a temperature point T according to the set temperature point_SThe operation is carried out according to the use requirements, and the operation is carried out according to several states such as an automatic refrigeration operation mode, an automatic heating operation mode, a rapid mode, a ventilation mode and the like; and step three, the electric control board and the operation board stop supplying power, and a stop mode or a refrigeration mode or a heating mode is selected for single control. The invention can meet the requirements of severe environmental adaptability and high reliability by designing three modes of weak current local control, weak current remote control, strong current control and the like, and is suitable for popularization and application.

Description

Control method of temperature adjusting unit

Technical Field

The invention belongs to the technical field of temperature adjusting units, and particularly relates to a control method of a temperature adjusting unit.

Background

At present, a device for providing heating air for a camping tent under the condition of cold temperature in winter and cooling air for the camping tent under the condition of hot temperature in summer is used as a temperature adjusting unit used under the condition of field survival. The conventional thermoregulation unit is controlled by a control panel, and when a client puts forward a remote control requirement, a remote control interface is designed on the control panel, so that the client can realize the control of a local control mode and a remote control mode, the operation of the client is convenient, and the control can be carried out in a tent or on the unit; however, as the field survival conditions are severe or the traffic is inconvenient, when the control panel breaks down, the local control and the remote control cannot be used, so that the unit cannot normally run. Therefore, a method for controlling a temperature control unit is needed to solve the above problems.

Disclosure of Invention

The present invention is directed to a method for controlling a temperature adjustment unit, which aims to solve the problems of the background art.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a control method of a temperature adjusting unit, which is characterized by comprising the following steps:

selecting a weak current control part or a strong current control part; if the weak current control part is selected, executing the step two; if the strong electric control part is selected, executing the step three;

step two, (1) setting the temperature to be T_S，T_SThe set range of (A) is 15-26 ℃;

(2) pressing the on-off key, starting to electrify the equipment, enabling the electric control board to enter a standby state, enabling the circulating fan M3 to start working, enabling the unit to enter an automatic running mode, and setting a temperature point T according to the set temperature point_SThe judgment and automatic execution state switching are carried out according to the following two states:

A. automatic cooling operation mode

When T is_h＞T_SWhen +2, the compressor M1 and the condensing fan M2 start to work, and refrigeration is started; wherein, T_hIs the temperature of the air in the cabin;

when T is_h≤T_S-1, cooling mode is off; and when T is_hWhen the temperature is less than or equal to 15 ℃, the refrigeration is closed;

when T is_S-3≤T_h≤T_SWhen +2, enter the ventilation mode;

B. automatic heating mode of operation

When T is_h≤T_SAt time-3, the fuel heater M4 starts to work to start heating;

when T is_h＞T_SWhen the temperature is high, the fuel oil heater M4 stops working, and heating is closed;

(3) according to the use requirement, the rapid mode is manually started, and the running state of the equipment is as follows:

when T is_h<T_SWhen the temperature is high, the PTC electric heater, the fuel oil heater M4 and the evaporation fan all operate at the maximum power; then when T is_h≥T_SWhen +2, the PTC electric heater and the fuel oil heater M4 stop working, the heating is closed, and the ventilation mode is switched to after 30 s;

when T is_h＞T_SWhen the air conditioner works, the evaporation fan, the compressor M1 and the condensation fan M2 start to work; then when T is_h≤T_SAt the time of-2, the compressor M1 and the condensing fan M2 stop working, refrigeration is turned off, and the ventilation mode is switched to the ventilation mode after 30 s;

(4) according to the use requirement, the ventilation mode is started, and the equipment running state is as follows:

only the circulating fan M3 works normally;

step three, (1) the electric control board and the operation board stop supplying power;

(2) selecting a stop mode or a cooling mode or a heating mode; if the stop module is selected, executing (3); if the refrigeration mode is selected, executing (4); if the heating mode is selected, executing (5);

(3) when the forced control knob SA1 is rotated to a stop position, a left normally open point C1 of the forced control knob SA1 is disconnected with NO1, and a right normally open point C2 of the forced control knob SA1 is disconnected with NO2, and at the moment, the compressor M1, the condensing fan M2, the circulating fan M3 and the fuel heater M4 stop working;

(4) a, the forced control knob SA1 is rotated to the left to be in a refrigeration position, and a left normally open point C1 and a NO1 which are carried by the forced control knob SA1 are closed at the moment;

B. the coil of the intermediate relay KA1 is electrified and acts, the KA1 is closed at the normally

open points

9 and 5, and 12 and 8;

C. the alternating current contactors KM1, KM2 and KM3 are electrified and act, the normally open

main contacts

1 and 2, 3 and 4 and 5 and 6 of the KM1 are closed, the normally open

main contacts

1 and 2, 3 and 4 and 5 and 6 of the KM2 are closed, and the normally open

main contacts

1 and 2, 3 and 4 and 5 and 6 of the KM3 are closed;

D. the compressor M1, the condensing fan M2 and the circulating fan M3 are powered to start refrigeration;

(5) a, the forced control knob SA1 is rotated rightwards to a heating position, and a right normally open point C2 and a NO2 of the forced control knob SA1 are closed at the moment;

B. the coil of the intermediate relay KA2 is electrified and acts, the normally

open points

9 and 5 of the coil KA2 are closed, the normally

open points

10 and 6 are closed, the normally

open points

12 and 8 are closed, and the normally closed

points

10 and 2 of the coil KA2 are opened;

C. the alternating current contactor KM3 and the coil KM4 are electrified and act, the normally open

main contacts

1 and 2, 3 and 4 and 5 and 6 of the coil KM3 are closed, the normally open

main contacts

1 and 2, 3 and 4 and 5 and 6 of the coil KM4 are closed, and the normally open auxiliary contacts 13 and 14 of the coil KM4 are closed;

D. the circulation fan M3 and the fuel heater M4 are powered to start heating.

The invention has the following beneficial effects:

the invention can meet the strict requirement of environmental adaptability and high reliability by designing three modes of weak current local control, weak current remote control, strong current control and the like, ensures the control reliability of the unit, realizes the remote control requirement of a client, can flexibly control various functions of the unit according to a communication protocol and sets the parameters of the temperature regulating unit; meanwhile, the remote control, the local control, the strong current control and other functions in the weak current control are integrated on the same operation panel under the condition that the use of the functions is not interfered with each other, so that the remote control, the local control, the strong current control and other functions are convenient for users to use, and the device has higher market application value.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a control system for a temperature conditioning unit of the present invention;

FIG. 2 is a schematic interface diagram of an operation panel according to the present invention;

FIG. 3 is a schematic circuit diagram of a strong current control part according to the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is an enlarged view of portion B of FIG. 3;

fig. 6 is an enlarged schematic view of a portion C in fig. 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

(2) the equipment starts to be electrified by pressing the switch key, the electric control board enters a standby state after sending out short beep, the circulating fan M3 starts to work, the unit enters an automatic operation mode and the set temperature point T is set_SJudging according to the following two states and automatically executing state switching in a delayed manner for two seconds:

A. automatic cooling operation mode

When T is_h＞T_S+2, compressor M1 and condensationThe fan M2 starts to work and starts to refrigerate; wherein, T_hIs the temperature of the air in the cabin;

when T is_S-3≤T_h≤T_SWhen +2, enter the ventilation mode;

B. automatic heating mode of operation

When T is_h≤T_SAt time-3, the fuel heater M4 starts to work to start heating;

only the circulator blower M3 worked normally and the circulator blower M3 was operated at 40% of maximum speed;

open points

9 and 5, and 12 and 8;

main contacts

1 and 2, 3 and 4 and 5 and 6 of the KM1 are closed, the normally open

main contacts

1 and 2, 3 and 4 and 5 and 6 of the KM2 are closed, and the normally open

main contacts

1 and 2, 3 and 4 and 5 and 6 of the KM3 are closed;

B. the coil of the intermediate relay KA2 is electrified and acts, the normally

open points

9 and 5, 10 and 6 and 12 and 8 of the coil of the KA2 are closed, the normally

closed points

10 and 2 of the coil of the KA2 are opened, and a power supply circuit of the coil of the alternating current contactor of the circulating fan is switched and controlled;

main contacts

1 and 2, 3 and 4 and 5 and 6 of the coil KM3 are closed, and the normally open

main contacts

1 and 2, 3 and 4 and 5 and 6 of the coil KM4 are closed; the KM4 is provided with normally open auxiliary contacts 13 and 14 which are closed, so that power is supplied to a heating switch port of a control box VD2 of the fuel heater;

D. the circulation fan M3 and the fuel heater M4 are powered to start heating.

In addition, the wind speed control of the circulating fan M3 can be controlled by a potentiometer RP1, after the circulating fan M3 is electrified, a direct-current voltage of 0-10V can be output by an integrated controller VD1 carried by the circulating fan M, the positive and negative poles (DC10V is the positive pole, and GND is the negative pole) of the voltage are connected to ports a and b corresponding to the maximum resistance value of the potentiometer, a resistance branch resistance wire port c is led out from the potentiometer and is connected to a wind speed adjusting analog signal input port E1 of the circulating fan M3, the ports DC24V and D1 on the integrated controller VD1 are in short circuit, and the rotary handle of the rotary potentiometer can be screwed to carry out stepless speed regulation on the circulating fan M3.

As shown in fig. 1, a control system of a temperature adjusting unit comprises a control module, a data detection module, an execution module, a centralized control subsystem and a power supply; the control module is respectively connected with the data detection module, the execution module, the centralized control subsystem and the power supply through the data transmission module;

the control module is used for receiving the state signals of the data detection module and the execution module, sending a control instruction, and performing power distribution and output; the control module comprises an electric cabinet and an operation panel; the operation panel is used for completing functions of switching, temperature equipment, displaying, working mode conversion and the like;

the data detection module comprises a return air temperature sensor, an environment temperature sensor, an air outlet temperature sensor, a high-pressure switch, a low-pressure switch, an oil tank liquid level switch, a water tank liquid level switch and a water tank temperature switch;

the execution module comprises a compressor M1, a condensing fan M2, a circulating fan M3, a fuel heater M4, an evaporation fan and the like;

wherein, the installation position, the connection mode and the connection relation among all the devices and the elements adopt the conventional design in the field.

The control of the system is controlled by adopting an automatic control mode, when the temperature is set, the heating or the refrigeration can be automatically judged by pressing a switch key, and when the ventilation mode is needed, the ventilation mode key is pressed to enable the equipment to enter the ventilation state from other states; the rapid mode key is that when rapid refrigeration or heating is needed, all parts run at the maximum power and are not adjusted according to temperature difference;

if the environment temperature is lower and the compressor M1 is closed, the crank heating belt of the compressor M1 is in a heating state until the compressor M1 is started to ensure the basic temperature of the operation of equipment devices; if the exhaust pressure is continuously lower after the compressor M1 is started, the rotating speed of the condensing fan M2 is correspondingly reduced through the pressure value so as to prevent the suction pressure from being too low; a condensing fan M2 of the system adopts a variable-pressure speed-regulating fan.

Specifically, the interface layout of the operation panel is as shown in fig. 2, and includes a nixie tube, a power indicator, an operation indicator, a refrigeration indicator, a fuel heating indicator, a ventilation mode indicator, an up-down key, an oil filling prompt indicator, a fault indicator, a remote control selector switch, a local selector switch, an on/off key, a ventilation mode key, a fast mode key, an alarm reset key, a control mode selector knob, a function selector knob, an air volume adjusting knob, and the like;

when the remote control and the local control selection switches are selected, the remote control and the local control selection switches are connected with the overall centralized control subsystem through CAN communication, and the control right is controlled by the centralized control subsystem; when the local control is selected, the operation panel can be used for selecting and controlling various functions, such as heating, refrigeration and ventilation;

for the fault indicator lamp, when the refrigerating or heating system has fault feedback, the fault indicator lamp is turned on, and meanwhile, a fault code is displayed on the nixie tube, and the fault code can be looked up by using an upper key and a lower key;

among the four control keys of the power-on/power-off key, the ventilation mode key, the fast mode key and the alarm reset key, the equipment enters an automatic operation mode after the power-on/power-off key is pressed, and the ventilation mode key, the fast mode key and the alarm reset key can interrupt the current working mode to enter the corresponding working mode;

the control mode knob is in an initial state when in a vertical position, and points to weak current control when rotating 90 degrees anticlockwise, and the equipment starts to perform weak current control; when the device rotates clockwise by 90 degrees, the device points to strong current control, and the device starts to perform strong current control;

the device comprises a function selection knob, a refrigeration device, a refrigeration system and a control device, wherein the function selection knob is in a stop state when in a vertical position, and points to a refrigeration state when rotating 90 degrees anticlockwise, and the device starts to refrigerate; when the device rotates clockwise by 90 degrees, the device points to a heating state, and the device starts to heat;

and when the air volume adjusting knob rotates clockwise, the air volume is adjusted from the maximum to the minimum.

Specifically, the connection manner and the positional relationship between the components in the strong electric control portion are shown in fig. 3 to 6.

It should be noted that in the strong electric control state, the monitoring of each fault is no longer visualized, and it is not possible to know that some equipment has operation fault or alarm prompt in the first time, so that the function is not recommended to be used if no special condition exists; when the electric control board has a fault, please report for maintenance as soon as possible, or confirm the good state of each component in advance, the electric control board can be used for starting up.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A control method of a temperature regulating unit is characterized by comprising the following steps:

A. automatic cooling operation mode

When T is_h＞T_SWhen +2, the compressor M1 and the condensing fan M2 start to work, and refrigeration is started; wherein, T_hFor the temperature of the air in the cabinDegree;

when T is_S-3≤T_h≤T_SWhen +2, enter the ventilation mode;

B. automatic heating mode of operation

When T is_h≤T_SAt time-3, the fuel heater M4 starts to work to start heating;

only the circulating fan M3 works normally;

(3) when the forced control knob SA1 is rotated to the stop position, a left normally open point C1 of the forced control knob SA1 is disconnected from NO1, and a right normally open point C2 of the forced control knob SA1 is closed and disconnected from NO2, and at the moment, the compressor M1, the condensing fan M2 and the circulating fan M3 are powered off and stop working;

B. the coil of the intermediate relay KA1 is electrified and acts, the KA1 is closed at the normally open points 9 and 5, and 12 and 8;

C. the alternating current contactors KM1, KM2 and KM3 are electrified and act, the normally open main contacts 1 and 2, 3 and 4 and 5 and 6 of the KM1 are closed, the normally open main contacts 1 and 2, 3 and 4 and 5 and 6 of the KM2 are closed, and the normally open main contacts 1 and 2, 3 and 4 and 5 and 6 of the KM3 are closed;

B. the coil of the intermediate relay KA2 is electrified and acts, the normally open points 9 and 5 of the coil KA2 are closed, the normally open points 10 and 6 are closed, the normally open points 12 and 8 are closed, and the normally closed points 10 and 2 of the coil KA2 are opened;

C. the alternating current contactor KM3 and the coil KM4 are electrified and act, the normally open main contacts 1 and 2, 3 and 4 and 5 and 6 of the coil KM3 are closed, the normally open main contacts 1 and 2, 3 and 4 and 5 and 6 of the coil KM4 are closed, and the normally open auxiliary contacts 13 and 14 of the coil KM4 are closed;

D. the circulation fan M3 and the fuel heater M4 are powered to start heating.