KR100422255B1 - A temperature controller for a cold and heat state and controlling method therof - Google Patents

Abstract

A cooling and heating temperature control method is disclosed. According to the invention, the display; A key input unit; A memory unit; An output unit; And fetching hysteresis upper and lower limit value information corresponding to control mode information from the memory unit, reading current temperature value information from a sensor unit, and if it is determined that the current temperature exists within the hysteresis upper and lower limit ranges, the output unit results. Information is maintained, and if the control mode is heating control and the current temperature is lower than the lower hysteresis lower limit, the result information of the output is controlled to drive the heating system. Stop the control mode, and if the control mode is cooling control and the current temperature is lower than the hysteresis lower limit, the result information of the output unit is controlled to stop the cooling system. Driven system It is composed of a control unit to control the system, heating control, cooling control, timer and heating time control, cooling time control function can be performed only by user's mode setting and setting value setting, which not only increases the ease of use but also increases the manufacturing cost of the system. Get savings.

Description

Air conditioning and temperature control device and method {A TEMPERATURE CONTROLLER FOR A COLD AND HEAT STATE AND CONTROLLING METHOD THEROF}

The present invention relates to a temperature control device and a method, and more particularly to a cooling and heating temperature control device and method capable of cooling control and heating control.

In general, the cooling control method compares the present temperature with the set temperature and controls the cooler on / off when the current temperature reaches the set temperature, and the heating control method compares the present temperature with the set temperature to compare the present temperature with the set temperature. When it reaches, it controls on / off of the fan

Therefore, these control methods are different, and in PLC control, each device, namely, a cooling temperature control device and a heating temperature control device, has to be used. Using each temperature control device not only increases the cost of the system, but also causes development problems that complicate the program in implementing the system.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a heating and cooling temperature control apparatus and method for controlling the heating and cooling temperature.

It is still another object of the present invention to provide a heating and cooling temperature control apparatus and method for controlling heating and cooling control in combination by a set timer.

According to a first aspect of the present invention, there is provided a cooling and heating temperature control apparatus including: a sensor unit configured to amplify and convert A / D signals detected from a temperature sensor; A display unit for outputting display text according to heating control and cooling control; A key input unit for receiving input of the control mode and setting temperature information and hysteresis upper and lower limit value information for the heating control and cooling control from a user; A memory unit for storing input information corresponding to the set value; An output unit for controlling a power supply of the connection device based on the result information according to the heating control and cooling control; And fetching hysteresis upper and lower limit information corresponding to the control mode information and the control mode information for the heating control and the cooling control selection from the memory unit, and reading the current temperature value information from the sensor unit. Is determined to exist within the hysteresis upper and lower limit intervals, the result information of the output unit is maintained, and if the control mode is heating control and the current temperature is lower than the hysteresis lower limit value, the result information of the output unit causes the heating system. Control to drive, and if the control mode is heating control and the current temperature is higher than the hysteresis upper limit value, the result information of the output is controlled to stop the heating system, the control mode is cooling control and the current temperature is the hysteresis If lower than lower limit The result information of the output unit controls to stop the cooling system, and if the control mode is cooling control and the current temperature is higher than the hysteresis upper limit value, the control signal is provided to the output unit so that the result information of the output unit drives the cooling system. Characterized in that consisting of a control unit for.

A heating and cooling temperature control method according to a second aspect of the present invention for achieving the above object comprises the steps of: a) determining whether a single mode is set for a single function of a timer; b) If it is determined that the timer alone mode is set, on / off control is performed according to time information input from a user. If the timer alone mode is not set, it is determined whether the current timer is on. Making; c) If the timer is not on, the control flag for controlling the access device is cleared, and the access device is controlled based on the control flag. If the timer is on, the heating and cooling control mode is Determining whether the heating mode is set; d) setting a setting flag when the control mode is a heating mode, and if the control mode is not a heating mode, clearing the setting flag and determining whether the currently detected temperature is lower than the hysteresis lower limit temperature. ; e) If the presently detected temperature is lower than the hysteresis lower limit temperature, the control flag is cleared, and if the presently detected temperature is not lower than the hysteresis lower limit temperature, is the current detected temperature higher than the hysteresis upper limit temperature? Determining; f) generating / outputting result information based on EXOR logic based on the information corresponding to the control flag value and the information corresponding to the set flag value; And g) if the current detected temperature is higher than the hysteresis upper limit temperature, set the control flag; and if the current detected temperature is not higher than the hysteresis upper limit temperature, maintain the control flag information and maintain the control flag information. And outputting the result information based on the.

1 is a front view of a temperature control device according to the present invention,

2 is a block diagram for explaining the operation according to the present invention,

3 is a graph for explaining the operation of the present invention,

4 is a flowchart for explaining an operating method of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: temperature control device 103: mode display unit

109: mode setting panel 111: setting panel

201: control unit 203: counter

205: memory 207: sensor

215: interface 217: output unit

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view showing a temperature control device according to the present invention. The front panel is divided into a mode setting panel 109, a set value panel 111, a time display unit 107, a temperature display unit 105, and a mode display unit 103.

The mode setting panel 109 is divided into a cooling mode, a heating mode, a timer mode, a cooling timer mode, and a heating timer mode, and is set to be set through a predetermined key switch. The mode display set at the time of setting the mode may be used using the temperature display section 105 and the time display section 107.

The set value panel 111 sets a set temperature value, a timer time value, and a hysteresis value for the set temperature. The hysteresis value is to set an upper limit value and a lower limit value of a set temperature, and an upper limit and a lower limit value can be set respectively, or can be set as a percentage of the set temperature value. For example, when the set temperature is 30 ° C. and the hysteresis set value is 10%, the operating point of the heater or the cooler is from 27 ° C. to 33 ° C.

The temperature display unit 105 and the time display unit 107 display the current temperature value and the current time value, and the function value is displayed when the mode is set. The display element uses FND, but of course, LCD and TFT can be used if necessary.

2 is a configuration diagram of a temperature control device according to the present invention. Referring to the exemplary drawings, a sensor unit 207 for temperature detection, an amplifier unit 209 for amplifying the amount of signal detected from the sensor unit 207, and a high frequency signal including noise of the amplified signal are removed. Low pass filter unit 211, A / D converter 213 for converting the filtered signal into a digitized signal, key input unit 219 for mode setting and setting value input, synchronous control and timer of the microcomputer A counter 203 used as a pulse generator for time setting, a memory unit 205 configured as an EEPROM for storing or changing setting value information set by a user, and a system control program built in a program memory. Based on the current temperature value information input from the A / D converter 213 and the user setting value information stored in the memory unit 205, the cooling and heating temperature control and the timer control are performed. The controller 201 for outputting the beam, the interface 215 for performing on-off contact control and the non-contact control according to the result information output from the controller 201, the text output information for setting the output unit 217 and the mode. And a display unit 221 for displaying information such as time setting or current setting value information, current detection value information, and error display.

The output unit 217 is composed of a relay device or a switching device such as high power TR, SCR, SSR, and the like. The memory unit 205 stores information about each mode and a current operation state. As an embodiment of the present invention, the memory unit 205 may represent register information as shown in Table 1 below.

Mode 1 (1 bit) Mode 2 (1 bit) Control Flag (1bit) Setting Flag (1bit) Time info / temperature info

The mode 1 and the mode 2 are set by the mode setting panel 109, where '01' is defined as a cooling control mode, '10' is defined as a heating control mode, and '11' is defined as a timer control mode. ) Is operation control information of heater and air conditioner according to each mode, and it indicates operation ON when '1' and operation OFF when '0', and setting flag is used to control the control flag in the program. Flag information. The time information indicates current operation time information when the timer is operated, and the temperature information is temperature data set by the user. Therefore, the register information is set by the user as needed.

Hereinafter, the operation of the present invention will be described with reference to the operation flowchart shown in FIG. 4.

The user inputs time information for operating the timer and mode selection through the key input unit 219. For example, it is assumed that the heating control is performed and the temperature is set to 30 ° C., the hysteresis is set to 10%, and the heating operation time is performed for 3 hours after 1 hour. The user switches to the heating control mode through the mode setting panel 109, and during mode conversion, the user recognizes the mode setting information through the FNDs of the temperature display unit 105 and the time display unit 107. When the mode setting is completed, a specific key (for example, pressing two keys of the mode setting panel at the same time) is operated and set.

Then, the mode setting panel 109 is operated to switch to the temperature setting mode, and then the temperature is set to 30 ° C. via the setting value panel 111. The user continuously operates the mode setting panel 109 to switch to the hysteresis mode, and sets the range through the setting value panel 111. In addition, after the mode setting panel 109 is operated to convert to the time setting mode, time information is input through the setting value panel 111 (S401).

The set information is stored in the memory unit 205 under the control of the control unit 201 (S403). The user turns on a specific key (pressing two keys of the set value panel at the same time) indicating the start of the operation of the system on the basis of the set information, and the control unit 201 responds to this to run the system program.

The control unit 201 fetches information stored in the memory unit 205 and determines whether the mode setting is a timer-only mode. That is, it is determined whether the least significant two bits of register information of the memory unit 205 shown in the embodiment is '11' (S405). If the two bits of information is not '11', it is determined whether a timer is set (S407). If the timer is set, it is determined whether the current timer is on. The controller 201 receives a clock signal from the counter 203 and subtracts the preset time information from the preset time information using the clock period information to turn on the timer. Determine the status.

If it is determined that the timer is not in the ON state, the control unit 201 clears the control flag (S417) and outputs the cleared flag information (S419). Since the control flag is '0', the timer is off.

On the other hand, when the integration information of the clock period applied from the counter 203 is equal to the time information set by the user, that is, when the timer on time is set by the user, the control unit 201 stores the memory unit 205. Mode 1 and mode 2 information stored in) is fetched to determine whether the heating mode (S415). This determines whether the mode 1 and mode 2 information is '10', and when the heating mode is set, the setting flag is set (S421). If the heating mode is not the heating mode, that is, the cooling mode is cleared, the control unit 201 instructs the control unit 201 to set or clear the setting flag bit in the register information of the memory unit 205.

On the other hand, the control unit 201 reads the A / D converting information of the temperature detection information detected from the sensor unit 207, fetches user set temperature information and hysteresis range information stored in the memory unit 205 and mutually. Compare. Figure 3 shows a heating and cooling graph for temperature control, it will be described with reference to this. 3A is a heating mode, and FIG. 3B is a graph of a cooling mode. Where U is the hysteresis upper limit and D is the hysteresis lower limit.

As the current heating mode is set, (a) will be explained through the graph after the timer is turned on. The controller 201 compares the currently detected temperature information with the lower hysteresis limit D. As previously set, whether the set temperature is lower than 27 ° C among 27 ° C and 33 ° C, which is a ± 10% of 30 ° C, is set. It is to determine (S425). As a result of the determination by the controller 201, if the present temperature is not lower than the 27 ° C., it is determined whether the current detection temperature is higher than the 33 ° C. which is the hysteresis upper limit U (S429). On the other hand, when the current detection temperature is not higher than 33 ° C., the current control flag information is latched (S433), and the corresponding information is output through S419. This is to maintain the current control state, and to maintain this state continuously when the heater is operating or not in the heating mode.

On the other hand, when the current temperature is greater than the hysteresis upper limit U in step S429, that is, when the current temperature value exceeds the hysteresis upper limit U, the control flag is set (S431). The value of the current control flag is assumed to be the current control flag value by applying the value of the setting flag and the exclusive OROR logic (S435).

Therefore, as the current heating mode, the setting flag is set to '1', and as the control flag is also set to '1', it is set to '0' by the exclusive oal logic, and the set information is returned to the control flag value. It is assumed (S435). As a result, the control flag value is '0' to stop the operation of the heater through the step S419.

When the temperature detected by the sensor unit 207 is lowered due to the operation stop of the heater, and the present temperature value exists within the upper limit U and the lower limit D of hysteresis, the control is performed through the step S433 as described above. Maintaining the flag value, which is to maintain the current operation of the heater (S433).

However, if it is determined that the temperature currently detected is continuously lowered and lower than the lower hysteresis D (S425), the control unit 201 clears the control flag (S427). In operation S435, the resultant value '1' is generated by performing exclusive oral logic on the control flag information '0' and the set flag information '1'. The generated result information is assumed to be a control flag to operate the heater through S419.

At this time, if it is determined that the clock period information read from the counter 203 by the controller 201 is the time when the timer should be turned off in comparison with the user timer setting information stored in the memory unit 205, the control flag is cleared. After that (S417), the corresponding information is output. Since the control flag is '0', the heater is stopped and the timer is stopped regardless of the current temperature value.

On the other hand, when the timer is kept in the state S407, and not in the heating mode, that is, the cooling mode is set in S415, the setting flag is cleared (S423). If the current detection temperature is lower than the current hysteresis lower limit D, the control flag is cleared (S427).

Therefore, since the current control flag value is '0' and the set flag value is also '0', the resultant value becomes '0' through step S435 and the air conditioner operation is stopped. However, if the current detection temperature is greater than the hysteresis upper limit U through step S429, the control flag is set to be set to the set flag value '0' and the control flag value '1'. As the exclusive oal logic of the two flag values becomes '1', the operation of the air conditioner is performed.

The control flag information, which is an on / off operation signal of an air conditioner or a heater, is provided by turning on a relay or a switching element such as SCR or SSR provided in the output unit 217 as provided from the controller 201 to the interface 215. .

On the other hand, if the mode information set by the user is to be used only as a timer (S405), the on time information and the off time information of the timer are determined (S409), and the control flag is set or cleared (S411 and S413). At this time, after the mode setting of the register information stored in the memory unit 205 is set to a timer mode of '11', only the timer is turned on / off according to the setting value of the control flag.

As described above, the cooling and heating temperature control apparatus and method according to the present invention can perform the heating control, cooling control, timer and heating time control, cooling time control functions only by user's mode setting and setting of the set value. Not only is it increased, the production cost of the system is reduced, and in particular, the PLC program is simplified in implementing the PLC control system.

What has been described above is only one embodiment for implementing the heating and cooling temperature control apparatus and method according to the present invention, the present invention is not limited to the above-described embodiment, the invention as claimed in the following claims Without departing from the gist of the present invention, those skilled in the art to which the present invention pertains to the technical spirit of the present invention to the extent that various modifications can be made.

Claims (6)

A sensor unit for amplifying and converting the signal detected from the temperature sensor (A / D); A display unit for outputting display text according to heating control and cooling control; A key input unit for receiving input of the control mode and setting temperature information and hysteresis upper and lower limit value information for the heating control and cooling control from a user; A memory unit for storing input information corresponding to the set value; An output unit for controlling a power supply of the connection device based on the result information according to the heating control and cooling control; And The control mode information for selecting the heating control and the cooling control and the hysteresis upper and lower limit value information corresponding to the control mode information are fetched from the memory unit, the current temperature value information is read from the sensor unit, and the current temperature is increased. If it is determined that the hysteresis upper and lower limit value is present, the result information of the output unit is maintained, and if the control mode is heating control and the current temperature is lower than the hysteresis lower limit value, the result information of the output unit drives the heating system. Wherein the result information of the output is controlled to stop the heating system if the control mode is heating control and the current temperature is higher than the hysteresis upper limit value, the control mode is cooling control and the current temperature is the hysteresis lower limit. If lower than value, Controlling the result information of the output to stop the cooling system, and if the control mode is cooling control and the current temperature is higher than the hysteresis upper limit value, providing a control signal to the output so that the result information of the output drives the cooling system. Heating and cooling temperature control device, characterized in that consisting of a control unit for. The air conditioner according to claim 1, wherein the hysteresis upper and lower limit value information is set as a percentage of the set temperature information. The heating and cooling temperature control device according to claim 1, wherein the connection device power supply control of the output unit is controlled by a non-contact element. The apparatus of claim 1, wherein the key input unit is capable of inputting a key for setting a time control, and includes a counter for providing a predetermined clock pulse, and the control unit receives time control setting information from the key input unit. A timer can be set based on a clock pulse of a counter, and the output unit includes a control element for controlling power supply to the connected device from an on / off control signal according to the timer setting. The air conditioner of claim 1 or 4, wherein the controller controls the output unit to perform air conditioning temperature control according to the timer setting. a) determining whether an exclusive mode for an exclusive function of a timer is set; b) If it is determined that the timer alone mode is set, on / off control is performed according to time information input from a user. If the timer alone mode is not set, it is determined whether the current timer is on. Making; c) If the timer is not on, the control flag for controlling the access device is cleared, and the access device is controlled based on the control flag. If the timer is on, the heating and cooling control mode is Determining whether the heating mode is set; d) setting a setting flag when the control mode is a heating mode, and if the control mode is not a heating mode, clearing the setting flag and determining whether the currently detected temperature is lower than the hysteresis lower limit temperature. ; e) If the presently detected temperature is lower than the hysteresis lower limit temperature, the control flag is cleared, and if the presently detected temperature is not lower than the hysteresis lower limit temperature, is the current detected temperature higher than the hysteresis upper limit temperature? Determining; f) generating / outputting result information based on EXOR logic based on the information corresponding to the control flag value and the information corresponding to the set flag value; And g) if the present detected temperature is higher than the hysteresis upper limit temperature, the control flag is set; if the present detected temperature is not higher than the hysteresis upper limit temperature, the control flag information is maintained and the control flag information is And outputting the result information based on the heating and cooling temperature control method.