TWI689689B - Multi-mode timing controller used in intelligent air conditioning and method thereof - Google Patents

Abstract

The invention discloses a method for multi-mode timing control including executing one of multiple modes associated with air conditioning operation; determining a first reference value and a second reference value which associate with a setup within a loading environment; determining a maximum output frequency of at least one means for frequency conversion associated with one of the modes being executed; and generating a control signal based on an accumulating time to implement the means for frequency conversion with the maximum output frequency.

Description

Multi-mode timing controller and method of intelligent air conditioner

The invention discloses an air conditioner controller and a method thereof, in particular to a multi-mode timing controller and a method related to a smart air conditioner.

Traditional cooling system (Cooling System), such as air-conditioning, is the largest source of electricity consumption for households for ordinary users. For ordinary households, they can directly choose to purchase inverter air conditioners to save energy. However, for an enterprise or company building, the air conditioner has already been built and configured. Usually, users will purchase inverter modules from inverter module manufacturers, but the purchased inverter modules cannot be directly configured in the traditional refrigeration system, so It is also necessary to purchase a Program Logic Control (PLC) program from an external software manufacturer to make the two work together. However, both the inverter module and the programmable logic control program require user expenses. In addition, the PLC program is not customized, and may require the PLC program provider to participate in the operation test. In this case, the user needs to pay extra time and costs.

In the control mechanism of the conventional PLC program, the speed of the cold air compressor is usually adjusted based on the pressure or temperature value of the load end. If the temperature is not well controlled, the cold air compressor will freeze, and the heating compressor will generate heat and overcool. Or overheating will cause damage to the compressor, and users will suffer property damage. In actual use, especially the air-conditioning system for maintaining the temperature of important equipment (servo, wafer processing equipment), it is important to avoid the equipment being unstable or failing due to overheating. Usually such equipment requires long and continuous work, which will continue to generate heat. Therefore, the environmental conditions in which these devices are located must be quite strict and do not allow considerable fluctuations in temperature.

In addition, for the air conditioning system used in the computer room, the equipment in these computer rooms usually has different modes of operation due to different loads, which requires personnel to adjust the temperature or set the parameters. Under the requirement of long-term air-conditioning operation in some factories, the degree of load change can be expected and related to the working time. If the multi-mode operation can be set based on time to meet the demand of full-load output, it will help to improve the operation of the air-conditioning system. effectiveness.

Accordingly, it is necessary to develop an air conditioner timing controller and control method for various operation modes in response to the above environmental conditions and needs.

To achieve the foregoing objectives, the present invention provides a multi-mode timed air-conditioning control method, which is executed by one or more processors. The method includes the steps of: performing one of multiple modes related to air-conditioning operation; setting an accumulated time, A first reference value and a second reference value, wherein the first reference value and the second reference value are related to the setting of a load environment; receiving at least one frequency conversion means of one of the executed modes A setting related to a maximum output frequency; and based on the accumulated time, a control signal is generated to cause the at least one frequency conversion means of the mode to execute at the maximum output frequency.

In a specific embodiment, the multiple modes related to the operation of the air conditioner include a constant temperature mode, a constant pressure mode, a differential temperature mode, and a differential pressure mode.

In a specific embodiment, one of the plurality of modes related to the operation of the air conditioner is a constant temperature mode, the first reference value is a temperature reference value, and the second reference value is a temperature correction value, the temperature The reference value indicates the expected temperature of the load environment, and the temperature correction value is used for temperature correction in the load environment.

In a specific embodiment, one of the plurality of modes related to the operation of the air conditioner is a constant pressure mode, the first reference value is a pressure reference value, and the second reference value is a pressure correction value, the The pressure reference value is the expected pressure at a water inlet or a water outlet, and the pressure correction value is used to correct the pressure value at the water inlet or the water outlet.

In a specific embodiment, one of the plurality of modes related to the operation of the air conditioner is a differential temperature mode, the first reference value is a temperature difference value, and the second reference value is a temperature upper limit value, The temperature difference is an expected temperature difference between an inlet end and an outlet end, and the upper temperature limit is an upper limit temperature of the inlet end.

In a specific embodiment, one of the plurality of modes related to the operation of the air conditioner is a differential pressure mode, the first reference value is a pressure difference value, and the second reference value is a pressure tolerance value, the The pressure difference value is a pressure difference between an inlet end and an outlet end, and the allowable value of the pressure is an allowable range of the pressure difference.

In a specific embodiment, the accumulated time indicates the time that the air conditioning operation continues to operate.

In a specific embodiment, one of these modes related to the air-conditioning operation is executed before the operation of the air-conditioning operation reaches the accumulated time.

According to this, the present invention also provides a multi-mode timing air conditioner controller, which executes the foregoing multi-mode timing control method. The controller includes: a temperature sensing port to receive temperature sensing signals generated by one or more temperature sensors at different locations; and a pressure sensing port to receive one or more at different locations A pressure sensing signal generated by a pressure sensor; a setting display interface to receive the accumulated time, the first reference value and the second reference value; and the one or more processors to execute the multi-mode timed air conditioning Steps of control method.

In a specific embodiment, the multi-mode timing air conditioner controller further includes: a communication interface to communicate with a remote information center system to upload the first reference value, the second reference value, the The temperature sensing signal and the pressure sensing signal; an output module generates an output voltage or an output current based on the first reference value, the second reference value or the accumulated time to control a frequency conversion control module.

These and other viewpoints and embodiments will become clear to those of ordinary skill in the related art with reference to the subsequent detailed description and accompanying drawings.

The embodiments will now be described in detail with reference to the accompanying drawings of the present invention. In the accompanying drawings, the same and/or corresponding elements are denoted by the same reference symbols.

Various embodiments will be disclosed here; however, it should be understood that the disclosed embodiments are only used as examples that can be embodied in various forms. In addition, each example given in connection with the various embodiments is intended to be illustrative, not limiting. Further, the drawings do not necessarily conform to the size ratio, and some features are enlarged to show the details of specific elements (and any dimensions, materials, and similar details shown in the drawings are intended to be illustrative and not limiting) . Therefore, the specific structural and functional details disclosed herein are not to be construed as limitations, but are merely used to teach those skilled in the relevant art to implement the disclosed embodiments.

In the following detailed description of a number of example specific embodiments, reference is made to the accompanying drawings, which form part of the present invention. It is shown by way of example description, and the described specific embodiments can be implemented by this example. Provide sufficient details to enable those skilled in the art to implement the described specific embodiments, and understand that other specific embodiments can be used and other changes can be made without departing from the spirit or scope thereof. In addition, although this may be the case, reference to "one embodiment" does not need to belong to the same or singular specific embodiment. Therefore, the following detailed description does not have a limiting idea, and the scope of the specific embodiments of the description is only defined by the scope of the additional patent applications.

The first figure is a block diagram of the multi-mode timing controller of the present invention. The controller may be part of the air conditioning system or independent of the air conditioning system (not shown). The air conditioning system is mainly divided into a load end and a cooling end, where the load end includes a coil fan and a control valve, and the cooling end includes a cooling water tower and other devices, which will not be repeated here one by one. As shown in the first figure, the multi-mode timing controller (100) includes a setting display interface (102), an environment detection port (104), a voltage/current output interface (106), and one or more microprocessors ( 108), memory (110), communication interface (112) and one or more status indicators (114). The setting display interface (102) is coupled to at least one input device to obtain the setting value and the mode selection value, and is coupled to at least one output device to display the running status. In the embodiments of the present invention, the input device includes, for example, a keyboard (120), etc., and the user can input setting values and mode selection values via the keyboard (120), and the output device includes, for example, a display (130), etc. The display (130) can Information about the operating status of the air conditioner is displayed to the user, such as information about the current status of the air conditioning system and history information about the use of the air conditioning system. In this embodiment, the operating state may also be displayed by a status indicator (114), which may be one or more color display means, or may be a means to send one or more sounds.

In addition, in the embodiment of the present invention, in addition to directly displaying the operating status on the display (130) and the status indicator (114), the communication center (112) can also be used to connect to the information center system via a communication protocol-based connection (160) Sending operation status, the communication protocol used by the communication interface (112) may be a wired communication protocol, a wireless communication protocol, or a combination of a wireless communication protocol and a wired communication protocol. The communication protocol can be the Internet, P2P network, private line, and virtual private network (VPN). The communication protocol can also be the mobile communication protocol of the mobile phone network, the wireless metropolitan area network (MAN) (for example: WiMAX (Registered trademark)), wireless local area network (LAN) (such as WiFi (registered trademark)), Bluetooth (registered trademark), Zigbee (registered trademark) and near field communication (NFC) communication protocols.

The environment detection port (104) is coupled to at least one environment sensor to obtain one or more values of the on-site environment. In this embodiment, the environment detection port (104) includes a temperature sensing port (104-1) And a pressure sensing port (104-2), wherein the temperature sensing port (104-1) is coupled to one or more temperature sensors (140) at the load end to obtain real-time temperature sensing values at the load end, pressure sensing The measuring port (104-2) is coupled to one or more pressure sensors (142) to obtain real-time pressure sensing values at the load end. The voltage/current output interface (106) is coupled to the inverter control module (150) of the air conditioning system. The inverter control module (150) is configured to drive a compressor (not shown) of the air conditioning system. Although the illustrated frequency control module (150) is independent of the controller (100), in some embodiments, it is also feasible that the frequency control module (150) is included in the controller (100).

The storage device (119) stores set values/parameters, measured values, instructions executable by the microprocessor (108), mode selection values, etc., and also stores many of the inventions executed in the second to sixth figures below, for example Software, programs or instructions for the modular timing control method. The microprocessor (108) is coupled to the setting display interface (102), the environment detection port (104), the voltage/current output interface (106), the memory (110), the communication interface (112) and the status indicator (114), To perform the multi-mode timing control method shown in the second to sixth figures below, for example.

The second figure shows the steps of the multi-mode timing control method of the present invention, including steps S200 to S204. Although the figures show that these steps are sequential, those with ordinary knowledge in the field to which the present invention belongs should understand that in other embodiments, certain steps may be exchanged or performed simultaneously.

At step S200, one or more of the modes related to the operation of the air conditioner are executed by one or more microprocessors (108) of the aforementioned controller. A user related to the controller inputs one of a plurality of operation modes of the air conditioning system through the setting display interface (102). The multiple modes related to the operation of the air conditioner include a constant temperature mode, a constant pressure mode, a differential temperature mode and a differential pressure mode. Among them, the constant temperature mode instructs the air conditioning system to operate with the goal of maintaining temperature, the constant pressure mode instructs the air conditioning system to operate with the goal of maintaining the line pressure in the air conditioning system, and the differential temperature mode instructs the air conditioning system to fall according to two different temperature values at the load While in operation, the differential pressure mode instructs the air conditioning system to operate according to the difference between two different pressure values at the load end. The microprocessor (108) receives the selection from one of the multi-modes of the setting display interface (102) and accordingly executes the selected mode, and ends step S200.

In step S201, the microprocessor (108) receives an accumulated time, a first reference value and a second reference value, wherein the accumulated time is related to the setting of the full-load operation of the air conditioning system, the first reference value And the second reference value is related to the setting of a load environment of the air conditioning system. A user related to the controller inputs the accumulated time, the first reference value and the second reference value through the setting display interface (102), and the first reference value and the second reference value may be temperature, pressure, correction value and/or Or a combination of error values, which is determined according to the choice of mode. The first reference value and the second reference value relate to the environmental value of the load end of the air conditioning system, which is related to the setting of the sensor, such as the ambient temperature of the load end and the pressure value of the water inlet/outlet end of the pipeline. The setting display interface (102) sets the cumulative time, the first reference value and the second reference value via the keyboard. In other embodiments, the controller of the present invention receives the first reference value and the second reference value from the information center system (160) or a remote via the communication interface (112). The values of the first reference value and the second reference value are determined by the operator, or in other possible embodiments, determined by a calculation by the processor. The received first reference value and second reference value are stored in the memory (110), and can also be uploaded to the information center system (160) through the communication interface (112). Step S201 ends.

In step S202, the microprocessor (108) receives a minimum output frequency related to at least one frequency conversion means of one of the executed modes. The user inputs a setting value of the minimum output frequency through the setting display interface (102) or the communication interface (112), and stores it in the memory (110), thereby determining the minimum output frequency of the frequency conversion means used in the selected mode . End step S202. Based on the minimum output frequency, the microprocessor (108) may cause the voltage/current output interface (106) to control the frequency conversion control module (150) and/or the compressor driven by it to operate at the minimum output frequency (ie, speed). The frequency conversion means can be realized by a known Proportional-Integral-Derivative (PID) method. The PID circuit is configured to receive the signal detected by the sensor, and compare the detected value with the preset value. Through feedback control to dynamically adjust the frequency, the compressor motor can be controlled to accelerate, decelerate or set a fixed speed. The specific circuit means of PID are well known to those with ordinary knowledge in the field to which the present invention belongs, so they will not be repeated here. The setting of the minimum output frequency is used in the initial working stage of the air-conditioning system after startup. After the PID control is introduced, the minimum output frequency used can gradually increase with the accumulation of the system running time. In other embodiments, step S202 may be omitted, that is, the memory of the multi-mode timing controller of the present invention may store a predetermined minimum output frequency value, so that the air conditioning system will follow the predetermined minimum output frequency value within a period of time after startup Run.

In step S203, the microprocessor (108) receives a maximum output frequency related to at least one frequency conversion means of one of the executed modes. The user inputs a setting value of the maximum output frequency through the setting display interface (102) or the communication interface (112), and stores it in the memory (110), thereby determining the maximum output frequency of the frequency conversion means used in the selected mode . End step S203. Based on the maximum output frequency, the microprocessor (108) can cause the voltage/current output interface (106) to control the inverter control module (150) and/or the compressor driven by it to operate at the maximum output frequency, that is, the compressor motor Run at full speed.

In step S204, based on the accumulated time, the microprocessor (108) generates a control signal to cause the at least one frequency conversion means in the mode to execute at the maximum output frequency. The user inputs a time setting value through the setting display interface (102) or the communication interface (112) and stores it in the memory (110). The memory (110) may store only a single time setting value applicable to all modes, or the memory (110) may store multiple time setting values for different modes. The accumulated time indicates the time that the air conditioning system operates continuously. For example, the accumulated time indicates a period of time that the air conditioning system continues to operate after being turned on. Or, the accumulated time indicates a time during which the air-conditioning system continues to operate in a certain mode. Alternatively, the accumulated time indicates a period of time that the compressor motor of the air conditioning system continues to operate at a certain frequency (not the maximum output frequency). The microprocessor of the controller is configured with the capability of a timer. When the air conditioning system lasts for a period of time under the foregoing conditions, the controller recognizes the time. When the microprocessor judges that the monitored time value reaches the accumulated time, it generates a control signal to cause the frequency conversion means or the compressor motor to operate based on the maximum output frequency. For example, the microprocessor (108) causes the voltage/current output interface (106) to generate a current control signal of 4 to 20 mA or a voltage control signal of 0 to 10 V (depending on the control strategy). End step S204.

Furthermore, before the operation of the air-conditioning system reaches the accumulated time, the air-conditioning system executes one of the modes related to the air-conditioning operation, such as the aforementioned constant temperature mode, constant pressure mode, differential temperature mode or differential pressure mode, Details are as follows.

The third diagram shows the control method in the constant temperature mode, including steps S300 to S306. Although the figures show that these steps are sequential, those with ordinary knowledge in the field to which the present invention belongs should understand that in other embodiments, certain steps may be exchanged or performed simultaneously.

In step S300, the microprocessor executes a constant temperature mode. The user selects the constant temperature mode through the setting display interface (102) or the communication interface (112), then the controller or the air conditioning system switches to the constant temperature mode logic according to the instructions related to the constant temperature mode stored in the memory, and ends step S300.

In step S301, the microprocessor receives a temperature reference value (ie, the first reference value). The user inputs a temperature reference value through the setting display interface (102) or the communication interface (112) and stores it in the memory (110). The temperature reference value indicates the expected temperature of the load environment of the air conditioning system, such as the temperature to be maintained in a space. Step S301 is ended.

In step S302, the microprocessor receives a temperature correction value (ie, the second reference value). The user inputs a temperature correction value through the setting display interface (102) or the communication interface (112) and stores it in the memory (110). The temperature correction value is used for temperature correction in the load environment. Step S302 ends.

In step S303, the microprocessor receives a maximum output frequency. The user inputs the maximum output frequency of an inverter through the setting display interface (102) or communication interface (112), thereby limiting the maximum speed of the compressor motor. Especially according to the method in the second figure, the maximum output frequency Generated when the system meets an accumulated time. End step S303.

At step 304, the microprocessor receives a minimum output frequency. The user inputs the minimum output frequency of an inverter via the setting display interface (102) or the communication interface (112), thereby limiting the minimum speed of the compressor motor. Especially according to the method in the second figure, the minimum output frequency will only Generated before the system meets the accumulated time. Step S304 is ended. As mentioned above, in other embodiments, this step may be omitted and replaced with a preset output frequency.

In step S305, the microprocessor receives one or more temperature sensing signals. The environmental detection port (104) transmits the temperature sensing signal from the load-side temperature sensor (140) to the microprocessor. Generally speaking, the temperature sensor is configured to convert the current ambient temperature of the load (such as the inlet water temperature) into a temperature sensing signal, which can be converted into an instant temperature value through known processing. Step S305 ends.

In step S306, the microprocessor determines the output frequency according to the temperature error at the water inlet or water outlet. The PID method used by the microprocessor generates a control signal to the voltage/current output interface (106) based at least on the received temperature reference value, temperature correction value, and real-time temperature value associated with the temperature sensing signal. For example, when the real-time temperature value is greater than the temperature reference value, the control signal causes the frequency conversion control module to increase the output frequency; conversely, when the real-time temperature value is less than the temperature reference value, the control signal causes the frequency conversion control module to decrease the output frequency. Step S306 ends.

However, no matter how the output frequency varies, once the operation of the system meets the accumulated time, the inverter control module or the compressor motor group operates at the maximum output frequency set previously.

The fourth diagram shows the control method in the constant voltage mode, including steps S400 to S406. Although the figures show that these steps are sequential, those with ordinary knowledge in the field to which the present invention belongs should understand that in other embodiments, certain steps may be exchanged or performed simultaneously.

In step S400, the microprocessor performs a constant voltage mode. The user selects the constant voltage mode through the setting display interface (102) or the communication interface (112), the controller or the air conditioning system switches to the constant voltage mode logic according to the instructions stored in the memory related to the constant voltage mode, and ends step S400 .

In step S401, the microprocessor receives a pressure reference value (ie, the first reference value). The user inputs a pressure reference value through the setting display interface (102) or the communication interface (112) and stores it in the memory (110). The pressure reference value is the expected pressure at an inlet end or an outlet end. The water inlet end generally refers to the cold water inlet end (from the ice water machine) of the load end, and the water outlet end generally refers to the cold water return water end (to the ice water machine) of the load end. Step S401 ends.

In step S402, the microprocessor receives a pressure correction value (ie, the second reference value). The user inputs a pressure correction value through the setting display interface (102) or the communication interface (112) and stores it in the memory (110). The pressure correction value is used to correct the pressure value at the water inlet or the water outlet. Step S402 ends.

In step S403, the microprocessor receives a maximum output frequency. The user inputs the maximum output frequency of an inverter through the setting display interface (102) or communication interface (112), thereby limiting the maximum speed of the compressor motor. Especially according to the method in the second figure, the maximum output frequency Generated when the system meets an accumulated time. Step S403 is ended.

At step 404, the microprocessor receives a minimum output frequency. The user inputs the minimum output frequency of an inverter via the setting display interface (102) or the communication interface (112), thereby limiting the minimum speed of the compressor motor. Especially according to the method in the second figure, the minimum output frequency will only Generated before the system meets the accumulated time. Step S404 is ended. As mentioned above, in other embodiments, this step may be omitted and replaced with a preset output frequency.

In step S405, the microprocessor receives one or more pressure sensing signals. The environment detection port (104) transmits the pressure sensing signal from the load-side pressure sensor (142) to the microprocessor. Generally speaking, the pressure sensor is configured to convert the current line pressure at the inlet or outlet of the load end to a pressure sensing signal, which can be converted into an instantaneous pressure value through known processing. Step S405 ends.

In step S406, the microprocessor determines the output frequency according to the pressure error at the water inlet or the water outlet. The PID method used by the microprocessor generates a control signal to the voltage/current output interface (106) based at least on the received pressure reference value, pressure correction value, and real-time pressure value associated with the pressure sensing signal. For example, when the instantaneous pressure value is greater than the set pressure reference value, the control signal causes the inverter control module to increase the output frequency; conversely, when the instantaneous pressure value is less than the set pressure reference value, the control signal causes the inverter control module to decrease the output frequency. End step S406.

However, no matter how the output frequency varies, once the operation of the system meets the accumulated time, the inverter control module or the compressor motor group operates at the maximum output frequency set previously.

The fifth diagram shows the control method in the differential pressure mode, including steps S500 to S506. Although the figures show that these steps are sequential, those with ordinary knowledge in the field to which the present invention belongs should understand that in other embodiments, certain steps may be exchanged or performed simultaneously.

In step S500, the microprocessor executes the differential pressure mode. The user selects the differential pressure mode through the setting display interface (102) or the communication interface (112), the controller or the air conditioning system switches to the differential pressure mode logic according to the commands stored in the memory related to the differential pressure mode, and ends step S500 .

In step S501, the microprocessor receives a pressure difference (ie, the first reference value). The user inputs a pressure difference value through the setting display interface (102) or the communication interface (112) and stores it in the memory (110). The pressure difference value is the pressure difference between an inlet end and an outlet end expected by the load end of the system. Step S501 ends.

In step S502, the microprocessor receives a pressure allowable value (ie, the second reference value). The user inputs a pressure tolerance value through the setting display interface (102) or the communication interface (112) and stores it in the memory (110). The allowable pressure value is the allowable range of the pressure difference. Step S502 ends.

At step S503, the microprocessor receives a maximum output frequency. The user inputs the maximum output frequency of an inverter through the setting display interface (102) or communication interface (112), thereby limiting the maximum speed of the compressor motor. Especially according to the method in the second figure, the maximum output frequency Generated when the system meets an accumulated time. Step S503 ends.

At step 504, a minimum output frequency is received by the microprocessor. The user inputs the minimum output frequency of an inverter via the setting display interface (102) or the communication interface (112), thereby limiting the minimum speed of the compressor motor. Especially according to the method in the second figure, the minimum output frequency will only Generated before the system meets the accumulated time. End step S504. As mentioned above, in other embodiments, this step may be omitted and replaced with a preset output frequency.

In step S505, the microprocessor receives one or more pressure sensing signals. The environment detection port (104) transmits the pressure sensing signal from the load-side pressure sensor (142) to the microprocessor. Generally speaking, the pressure sensor is configured to convert the inlet and outlet pressures of the load end into pressure sensing signals, which can be converted to the respective real-time pressure values of the inlet and outlet ends by known processes and The immediate pressure difference between the two. Step S505 ends.

In step S506, the microprocessor determines the output frequency according to the error of the instantaneous pressure difference. The PID method used by the microprocessor generates a control signal to the voltage/current output interface (106) based at least on the received pressure difference, the pressure tolerance and the real-time pressure difference associated with the pressure sensing signal. For example, when the instantaneous pressure value is greater than the set pressure difference and its pressure allowable range, the control signal causes the inverter control module to reduce the output frequency; conversely, when the instantaneous pressure value is less than the set pressure difference and its pressure allowable range, The control signal causes the frequency conversion control module to increase the output frequency. End step S506.

However, no matter how the output frequency varies, once the operation of the system meets the accumulated time, the inverter control module or the compressor motor group operates at the maximum output frequency set previously.

The sixth figure shows the control method in the differential temperature mode, including steps S600 to S606. Although the figures show that these steps are sequential, those with ordinary knowledge in the field to which the present invention belongs should understand that in other embodiments, certain steps may be exchanged or performed simultaneously.

In step S600, the microprocessor executes the differential temperature mode. The user selects the differential temperature mode through the setting display interface (102) or the communication interface (112), the controller or the air conditioning system switches to the differential temperature mode logic according to the instructions stored in the memory related to the differential temperature mode, and ends step S600 .

In step S601, the microprocessor receives a temperature difference (ie, the first reference value). The user inputs a temperature difference through the setting display interface (102) or the communication interface (112) and stores it in the memory (110). The temperature difference value is an expected temperature difference between an inlet end and an outlet end of the load environment. When the temperature difference between the two is higher, it means that the ice water absorbs and takes away considerable heat. Step S601 ends.

In step S602, the microprocessor receives a temperature upper limit (ie, the second reference value). The user inputs a temperature upper limit through the setting display interface (102) or the communication interface (112), and stores it in the memory (110). The upper temperature limit is the upper temperature limit value of the outlet end of the load environment, and accordingly the air conditioning system maintains that the outlet temperature of the on-site load environment does not exceed the upper limit value. End step S602.

In step S603, the microprocessor receives a maximum output frequency. The user inputs the maximum output frequency of an inverter through the setting display interface (102) or communication interface (112), thereby limiting the maximum speed of the compressor motor. Especially according to the method in the second figure, the maximum output frequency Generated when the system meets an accumulated time. End step S603.

At step 604, the microprocessor receives a minimum output frequency. The user inputs the minimum output frequency of an inverter via the setting display interface (102) or the communication interface (112), thereby limiting the minimum speed of the compressor motor. Especially according to the method in the second figure, the minimum output frequency will only Generated before the system meets the accumulated time. End step S604. As mentioned above, in other embodiments, this step may be omitted and replaced with a preset output frequency.

In step S605, the microprocessor receives one or more temperature sensing signals. The environment detection port (104) transmits the temperature sensing signal from the temperature sensor (140) at the inlet and outlet ends of the load end to the microprocessor. Generally speaking, the temperature sensor is configured to convert the current inlet water temperature and outlet water temperature of the load end into a temperature sensing signal, which can be converted into two real-time temperature values through known processing and a real-time Temperature difference. End step S605.

In step S606, the microprocessor determines the output frequency according to the instantaneous temperature difference between the water inlet and the water outlet. The PID method used by the microprocessor generates a control signal to the voltage/current output interface based on at least the set temperature difference, the temperature upper limit value, and the real-time temperature difference associated with the temperature sensing signal (106). For example, when the real-time temperature difference is greater than the set temperature difference, the control signal causes the inverter control module to reduce or maintain the output frequency; conversely, when the real-time temperature difference is less than the set temperature difference, the control signal causes the inverter control module Increase the output frequency. Step S606 ends.

Generally speaking, in the on-site load environment, the temperature at the inlet end is less than the temperature at the outlet end. However, in some special cases, the temperature at the inlet end may be abnormally higher than the temperature at the outlet end. Therefore, in the differential temperature mode, step S606 may include determining the output frequency according to whether the temperature of the inlet end is greater than the temperature of the outlet end. That is to say, when the temperature of the inlet end is greater than the temperature of the outlet end, the control signal of the microprocessor causes the inverter control module to increase the output frequency to accelerate the speed of the compressor motor.

In summary, the present invention is characterized by providing a multi-mode timing control method. According to this, the air conditioning system can be started in any mode and continue to warm up for a period of time. The air conditioning system does not enter the full-speed operation mode until the accumulated time condition is satisfied. In this way, the air conditioning system equipped with the control means of the present invention can provide a two-stage operation mode, such as one of the aforementioned multiple modes and a full-speed operation mode. Even, in a possible configuration, the setting of more sets of accumulated time can give the air-conditioning system more operation modes, so that the process of starting from the air-conditioning system to stable operation introduces a planned control strategy to allow the air-conditioning system Optimization of efficiency.

100: Multi-mode timing controller

102: Set the display interface

104: Environmental detection port

104-1: Temperature sensing port

104-2: Pressure sensing port

106: voltage/current output interface

108: Microprocessor

110: memory

112: Communication interface

114: Status indicator

120: keyboard

130: display

140: temperature sensor

142: Pressure sensor

150: frequency conversion control module

160: Information Center System

S200 to S204: Steps

S300 to S306: Steps

S400 to S406: steps

S500 to S506: Steps

S600 to S606: Steps

The invention can be further understood with reference to the following drawings and description. Non-limiting and non-exhaustive examples are described with reference to the following drawings. The components in the drawings do not have to be actual sizes; the emphasis is on explaining the structure and principles.

The first figure shows a block diagram of the multi-mode timing controller of the present invention.

The second figure shows the flow chart of the steps of the multimode timing control method of the present invention.

The third figure shows a flow chart of the steps of one of the multi-mode timing control methods of the present invention (constant temperature mode).

The fourth figure shows a flow chart of one of the multi-mode timing control methods of the present invention (constant voltage mode).

The fifth figure shows a flow chart of one of the steps (differential pressure mode) of the multi-mode timing control method of the present invention.

The sixth figure shows a flow chart of one of the steps (differential temperature mode) of the multi-mode timing control method of the present invention.

S200 to S204: Steps

Claims (12)

A multi-mode timed air-conditioning control method for an air-conditioning system. The method is executed by one or more processors. The method includes the steps of: performing one of multiple modes related to air-conditioning operation; receiving a first reference Value and a second reference value, wherein the first reference value and the second reference value are settings related to a load environment; receiving one related to at least one frequency conversion means of one of the executed modes Maximum output frequency; and based on an accumulated time, a control signal is generated to cause the at least one frequency conversion means of the mode to execute at the maximum output frequency, wherein, before the accumulated time, based on the executed mode and the received The first reference value and the second reference value are determined by the control signal to output the frequency of the at least one frequency conversion means to operate the air conditioning system. The multi-mode timed air conditioning control method as described in item 1 of the patent application scope, wherein the multiple modes related to the operation of the air conditioning include a constant temperature mode, a constant pressure mode, a differential temperature mode, and a differential pressure mode. The multi-mode timed air-conditioning control method as described in item 2 of the patent application range, wherein one of the plurality of modes related to the operation of the air-conditioning is a constant temperature mode, and the first reference value is a temperature reference value, the first The two reference values are a temperature correction value indicating the expected temperature of the load environment, and the temperature correction value is used for temperature correction in the load environment. The multi-mode timed air-conditioning control method as described in item 2 of the patent application range, wherein one of the plurality of modes related to the operation of the air-conditioning is a constant pressure mode, and the first reference value is a pressure The reference value, the second reference value is a pressure correction value, the pressure reference value is an expected pressure at an inlet or an outlet, and the pressure correction is used to correct the pressure at the inlet or outlet. The multi-mode timed air-conditioning control method as described in item 2 of the patent application range, wherein one of the plurality of modes related to the execution of the air-conditioning operation is a differential temperature mode, and the first reference value is a temperature difference, the The second reference value is an upper temperature limit value, the temperature difference value is an expected temperature difference between an inlet end and an outlet end, and the upper temperature limit value is an upper temperature limit value of the inlet end. The multi-mode timed air-conditioning control method as described in item 2 of the patent application range, wherein one of the plurality of modes related to the execution of the air-conditioning operation is a differential pressure mode, and the first reference value is a pressure difference, the The second reference value is a pressure allowable value, the pressure difference value is a pressure difference between an inlet end and an outlet end, and the pressure allowable value is an allowable range of the pressure difference. The multi-mode timed air-conditioning control method as described in item 1 of the scope of the patent application, wherein the accumulated time indicates the duration of continuous operation of the air-conditioning operation. The multi-mode timing air-conditioning control method as described in item 7 of the patent application scope further includes: receiving a minimum output frequency so that the at least one frequency conversion means of the mode is operated before the operation of the air-conditioning operation reaches the accumulated time This minimum output frequency operates. The multi-mode timer air-conditioning control method as described in item 7 of the patent application range, wherein one of these modes related to the air-conditioning operation is executed before the operation of the air-conditioning operation has reached the accumulated time. A multi-mode timing air-conditioning controller that implements the multi-mode timing control method as described in one of the patent application items 1 to 9, the controller includes: a temperature sensing port that receives one or Temperature sensing signals generated by multiple temperature sensors; A pressure sensing port, receiving pressure sensing signals generated by one or more pressure sensors located at different positions; a setting display interface, receiving the first reference value and the second reference value; and the one Or multiple processors to execute the steps of the multi-mode timing air conditioning control method. The multi-mode timer air-conditioning controller as described in item 10 of the patent application scope further includes: a communication interface to communicate with a remote information center system to upload the first reference value, the second reference value, The temperature sensing signal and the pressure sensing signal. The multi-mode timer air-conditioning controller as described in item 10 of the patent application scope further includes: an output module that generates an output voltage or an output current based at least on the first reference value, the second reference value, or the accumulated time To control a frequency conversion control module.

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