Control method of temperature control system

Abstract

The invention provides a control method of a temperature control system, which comprises the following steps: a temperature controller sends an identification action signal and an identification silence signal, solid-state relays respond to the identification action signal, and the number of the solid-state relays is determined according to the maximum sorting value of the solid-state relays responding to the identification action signal; the temperature controller sends a control action signal and a control silence signal, the solid-state relays respond to the control action signal and further control starting and stopping of the corresponding heaters, the temperature controller and the multiple solid-state relays are connected in series through the communication line, and after the solid-state relays receive new signals, the signals received in advance are transmitted to the next solid-state relay, and then the next solid-state relay is started. The temperature controller sends out a plurality of signals, the plurality of signals are sequentially transmitted among the plurality of solid-state relays according to the sending sequence, the transmission method is simple, the error rate is low, the signals are directly transmitted among the adjacent solid-state relays, and the signal transmission speed is high.

Description

Technical Field

[0001] This invention relates to the field of temperature control technology, and in particular to a control method for a temperature control system. Background Technology

[0002] A temperature control system is a device or system used to monitor and regulate the temperature of a specific environment (such as an industrial oven). It senses temperature changes through a temperature sensor and transmits the data to a control unit. The control unit compares the actual temperature with the target temperature according to a preset temperature range, and controls the power supply to the heating element through an actuator to keep the temperature of the specific environment within the set temperature range.

[0003] Solid-state relays are typically used in temperature control systems to control the power supply to heating elements. However, in existing technologies, a single solid-state relay can only control the power supply to a single heating element. As the number of heating elements increases, the number of solid-state relays also increases. Especially in temperature control systems, a single temperature control device may use a large number of heating elements, thus increasing the required number of solid-state relays. This increase in the number of solid-state relays also increases the installation space required in the temperature control device. Furthermore, each solid-state relay needs its own power supply and control module (such as a TEB or temperature control host), resulting in numerous, complex, and tangled wires that are difficult to organize. Additionally, the control system uses DIP switches to control the operation of solid-state relays. Each solid-state relay corresponds to a DIP switch, and each DIP switch has an independent binary code. When controlling a solid-state relay, the binary code of the corresponding DIP switch is read, and then a signal is output. If the binary code of a DIP switch is set incorrectly, the corresponding solid-state relay cannot be controlled. This complex control method is prone to errors. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a control method for a temperature control system, which uses a communication line to connect a temperature controller and multiple solid-state relays in series. When a solid-state relay receives a new signal, it will pass the previously received signal to the next solid-state relay. The temperature controller sends out several signals, which are then passed between the multiple solid-state relays in the order of transmission. The transmission method is simple, has a low error rate, and the signals are directly transmitted between adjacent solid-state relays, resulting in fast signal transmission speed.

[0005] To solve the above-mentioned technical problems, the technical solution used in this invention is as follows:

[0006] The present invention discloses a control method for a temperature control system, which is implemented through a temperature control system including a temperature controller and solid-state relays. The temperature controller and multiple solid-state relays are connected in series via a communication line; the solid-state relays are connected to a heater.

[0007] The control method of the temperature control system includes the following steps:

[0008] S1. The temperature controller sends an identification signal. After the previous solid-state relay receives the new identification signal, it will pass the previously received identification signal to the next solid-state relay. The identification signal includes an identification action signal and an identification silence signal. The solid-state relay responds to the identification action signal. The number of solid-state relays is determined according to the maximum sorting value of the solid-state relays that respond to the identification action signal.

[0009] S2. The temperature controller sends an identification signal. After the previous solid-state relay receives the new identification signal, it will pass the previously received identification signal to the next solid-state relay. The identification signal includes an identification action signal and an identification silence signal. The solid-state relay responds to the identification action signal. The number of solid-state relays is determined according to the maximum sorting value of the solid-state relays that respond to the identification action signal.

[0010] Preferably, S1 specifically includes the following steps:

[0011] S1.1 The temperature controller first sends an action recognition signal to the solid-state relay, and then sends several silence recognition signals to the solid-state relay in a loop.

[0012] S1.2. Each time the temperature controller sends an identification action signal or identification silence signal, the solid-state relay will pass the received identification action signal or identification silence signal to the next solid-state relay, and the solid-state relay will respond to the identification action signal.

[0013] S1.3 Determine the total number of solid-state relays based on the maximum sorting value of the solid-state relays that identify the action signal at the end of the relay.

[0014] Preferably, in S2, controlling the operation of a solid-state relay includes the following steps:

[0015] S2.1 Determine the sorting values ​​for the solid-state relays to be controlled.

[0016] S2.2 The temperature controller first sends a control action signal, and then sends N-1 control silence signals; each time the temperature controller sends a control action signal or control silence signal, the solid-state relay will pass the received control action signal or control silence signal to the next solid-state relay; N is the sorting value of the solid-state relays to be controlled.

[0017] Preferably, in S2, controlling the operation of multiple solid-state relays includes the following steps:

[0018] S2.3 Determine the sorting values ​​of multiple solid-state relays to be controlled and the interval values ​​of adjacent solid-state relays to be controlled.

[0019] S2.4 According to the sorting value of each solid-state relay to be controlled and the interval value of the silent solid-state relay between adjacent solid-state relays to be controlled, the temperature controller alternately and cyclically sends control action signals and control silence signals corresponding to the number of interval values; each time the temperature controller sends a control action signal or control silence signal, the solid-state relay will pass the received control action signal or control silence signal to the next solid-state relay.

[0020] Preferably, S2.4 specifically includes the following steps:

[0021] S2.41 The temperature controller alternately sends control action signals and control silence signals in the corresponding order according to the maximum sort value of the solid-state relay to be controlled. Then, it sends a number of control silence signals according to the interval between the solid-state relay to be controlled with the largest sort value and the previous solid-state relay to be controlled.

[0022] S2.42, The temperature controller sends another control action signal and determines whether the solid-state relay to be controlled corresponding to the current control action signal is the solid-state relay to be controlled and has the smallest sort value. If yes, proceed to S2.43; otherwise, proceed to S2.44.

[0023] S2.43, The temperature controller sends M-1 control silence signals; M is the solid-state relay to be controlled and has the smallest sorted value; the temperature controller ends sending control signals.

[0024] S2.44. Send a control mute signal according to the interval value between the solid-state relay to be controlled corresponding to the current control action signal and the previous solid-state relay to be controlled; then proceed to S2.45.

[0025] S2.45 Repeat steps S2.42-S2.45 until control action signals are sent to all solid-state relays to be controlled, and then send M-1 control silence signals; M is the solid-state relay to be controlled with the smallest sort value, and then the temperature controller ends sending control signals.

[0026] Preferably, the action recognition signal is a non-zero value signal, and the silence recognition signal is a zero value signal.

[0027] Preferably, the control action signal is a non-zero value signal, and the control silence signal is a zero value signal.

[0028] Compared with existing technologies, the beneficial effects of the temperature control system control method described in this invention are mainly reflected in the following aspects: A temperature controller and multiple solid-state relays are connected in series via a communication line. When a solid-state relay receives a new signal, it transmits the previously received signal to the next solid-state relay. The temperature controller sends several signals, which are transmitted sequentially among the multiple solid-state relays according to the sending order. This transmission method is simple, has a low error rate, and the signals are directly transmitted between adjacent solid-state relays, resulting in fast signal transmission speed. Simultaneously, the temperature controller sends an identification action signal, an identification silence signal, a control action signal, and a control silence signal. The solid-state relays respond to the identification action signal to determine the number of solid-state relays, and respond to the control action signal to achieve control of the solid-state relays. Attached Figure Description

[0029] The above and other objects, features, and advantages of the invention will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0030] Figure 1 This is a schematic diagram of the temperature control system.

[0031] Figure 2 This is a schematic diagram of a solid-state relay.

[0032] The following are the diagram labels: 1. Temperature controller; 2. Solid-state relay; 3. Heater; 4. Communication line. Detailed Implementation

[0033] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. In this embodiment, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0034] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0035] like Figure 1-2 As shown, a control method for a temperature control system is implemented through a temperature control system, which includes a temperature controller 1 and solid-state relays 2. The temperature controller 1 and multiple solid-state relays 2 are connected in series via a communication line 4. The solid-state relays 2 are connected to a heater 3. The temperature controller sends an identification signal and a control signal. The identification signal is used to identify the solid-state relays, and the control signal is used to control the operation of the solid-state relays, thereby controlling the start-up and shutdown of the corresponding heaters.

[0036] The solid-state relay includes an MCU, a driver chip, and a communication interface. The driver chip is a shift register with latching function, and the heater is signal-connected to the driver chip. The MCU receives signals from the temperature controller to drive the driver chip. The driver chip is a series-to-parallel converter chip. The driver chip is existing technology and will not be described in detail here. Signal connections are established between the MCU, the driver chip, and the communication interface.

[0037] The plurality of solid-state relays are arranged in sequence; there are two communication interfaces, namely an uplink communication interface and a downlink communication interface; the uplink communication interface of the first solid-state relay is connected to the solid-state relay, and the downlink communication interface of the first solid-state relay is connected to the uplink communication interface of the next solid-state relay. The plurality of solid-state relays are arranged in sequence, and the downlink communication interfaces and uplink communication interfaces of adjacent solid-state relays are interconnected.

[0038] In the above system, the temperature controller is connected in series with multiple solid-state relays, reducing wiring and simplifying the temperature control system. The communication interface includes a DO pin, a CS pin, a CLK pin, a DI pin, and a power supply pin. The CLK pin is used for input / output clock signals; the power supply pin supplies power to the solid-state relays; the DO, CS, and DI pins are used for data transmission. When transmitting identification signals, the MCU receives the identification signal and inputs it to the driver chip via the DO pin. When transmitting control signals, the MCU receives the control signal and inputs it to the driver chip via the DO pin. After the driver chip receives the control signal, the MCU triggers the CS pin, and the driver chip synchronously outputs the received control signal. The driver chip generates a pulse signal through the CS pin to control the heater's operation. The DI pin is used to transmit both identification and control signals, which are then passed to the next solid-state relay.

[0039] The driver chip has a DO1 pin, and the DI pin and DO1 pin are used to realize data loopback; an on / off switch is connected between the DI pin of the uplink communication interface, the DI pin of the downlink communication interface, and the DO1 pin; the MCU output signal controls the on / off switch to control the conduction and disconnection of the DI pin of the uplink communication interface and the DI pin of the downlink communication interface, and controls the conduction and disconnection of the DI pin of the uplink communication interface and the DO1 pin.

[0040] In a series of solid-state relays arranged in sequence, the solid-state relays located at the end and beyond achieve data loopback through the DI pin; the solid-state relays located at the end achieve loopback through the DO1 pin.

[0041] The solid-state relay located at the end outputs a high level from the MCU's PA1 pin to the on / off switch, enabling the DI pin and DO1 pin of the uplink communication interface to conduct; the solid-state relay located outside the end outputs a high level from the MCU's PA1 pin to the on / off switch, enabling the DI pin of the uplink communication interface and the DI pin of the downlink communication interface to conduct.

[0042] During data loopback, the data output by the MCU in the end solid-state relay is input to the DO1 pin via the PA0 pin of the MCU, and then input to the DI pin of the uplink communication interface. The data loopback is then achieved through the DI pin of the downlink communication interface and the DI pin of the uplink communication interface of the previous solid-state relay.

[0043] In the solid-state relay located outside the end, the data output by the MCU is input to the DI pin of the uplink communication interface via the PA0 pin of the MCU, and then the data is transmitted to the next solid-state relay to achieve data loopback.

[0044] The identification signals include an identification action signal and an identification silence signal; the control signals include a control action signal and a control silence signal; in a preferred embodiment, the identification action signal is a non-zero value signal, preferably a non-zero value byte data; the control action signal is a non-zero value signal, preferably a non-zero value byte data; the identification silence signal is a zero value signal, preferably a zero value byte data; the control silence signal is a zero value signal, preferably a zero value byte data. The solid-state relay responds to and transmits the identification action signal and the control action signal, and the solid-state relay transmits the identification silence signal and the control silence signal.

[0045] Working principle of temperature control system:

[0046] The temperature controller sends an identification action signal and several identification silence signals in sequence. The identification action signal and several identification silence signals are transmitted sequentially among multiple series solid-state relays. The number of solid-state relays is determined based on the maximum sequence value of the solid-state relays that respond to the identification action signal.

[0047] The MCU is connected to a temperature sensor. Based on the temperature sensor feedback and the set value, the MCU determines which heater needs to be switched on and off, and determines the order of the number of solid-state relays to be controlled corresponding to the heaters that need to be switched on and off. Switching the heaters on and off includes starting the heater and turning off the heater.

[0048] The temperature controller sends control action signals and control silence signals in sequence according to the order of the solid-state relays to be controlled. The control action signals and control silence signals are transmitted sequentially among multiple series-connected solid-state relays. The solid-state relays to be controlled respond to the control action signals and send pulse signals to the heaters that need to switch on / off states, thereby controlling the start-up and shutdown of the corresponding heaters.

[0049] The control method of the temperature control system includes the following steps:

[0050] S1. The temperature controller sends an identification signal. After the previous solid-state relay receives the new identification signal, it will pass the previously received identification signal to the next solid-state relay. The identification signal includes an identification action signal and an identification silence signal. The solid-state relay responds to the identification action signal. The number of solid-state relays is determined according to the maximum sorting value of the solid-state relays that respond to the identification action signal.

[0051] S2. The temperature controller sends a control signal. After the previous solid-state relay receives the new control signal, it will pass the previously received control signal to the next solid-state relay. The control signal includes a control action signal and a control mute signal. The solid-state relay responds to the control action signal and then controls the start and stop of the corresponding heater.

[0052] S1 specifically includes the following steps:

[0053] S1.1 The temperature controller first sends an action recognition signal to the solid-state relay, and then sends several silence recognition signals to the solid-state relay in a loop.

[0054] S1.2. Each time the temperature controller sends an identification action signal or identification silence signal, the solid-state relay will pass the received identification action signal or identification silence signal to the next solid-state relay, and the solid-state relay will respond to the identification action signal.

[0055] S1.3 Determine the total number of solid-state relays based on the maximum sorting value of the solid-state relays that identify the action signal at the end of the relay.

[0056] S2 specifically includes the following steps:

[0057] S2.0: Control the operation of one solid-state relay, proceeding to S2.1-S2.2; Control the operation of multiple solid-state relays, proceeding to S2.3-S2.4.

[0058] S2.1 Determine the sorting values ​​for the solid-state relays to be controlled.

[0059] S2.2 The temperature controller first sends a control action signal, and then sends N-1 control silence signals; each time the temperature controller sends a control action signal or control silence signal, the solid-state relay will pass the received control action signal or control silence signal to the next solid-state relay; N is the sorting value of the solid-state relays to be controlled.

[0060] Each time the temperature controller sends a control signal, the solid-state relay will pass the received control signal to the next solid-state relay; N is the sorting value of the solid-state relays to be controlled.

[0061] S2.3 Determine the sorting values ​​of multiple solid-state relays to be controlled and the interval values ​​of adjacent solid-state relays to be controlled.

[0062] S2.4 According to the sorting value of each solid-state relay to be controlled and the interval value of the silent solid-state relay between adjacent solid-state relays to be controlled, the temperature controller alternately and cyclically sends control action signals and control silence signals corresponding to the number of interval values; each time the temperature controller sends a control action signal or control silence signal, the solid-state relay will pass the received control action signal or control silence signal to the next solid-state relay.

[0063] Each time the temperature controller sends a control signal, the solid-state relay will pass the received control signal to the next solid-state relay.

[0064] S2.4 specifically includes the following steps:

[0065] S2.41 The temperature controller alternately sends control action signals and control silence signals in the corresponding order according to the maximum sort value of the solid-state relay to be controlled. Then, it sends a number of control silence signals according to the interval between the solid-state relay to be controlled with the largest sort value and the previous solid-state relay to be controlled.

[0066] S2.42, The temperature controller sends another control action signal and determines whether the solid-state relay to be controlled corresponding to the current control action signal is the solid-state relay to be controlled and has the smallest sort value. If yes, proceed to S2.43; otherwise, proceed to S2.44.

[0067] S2.43, The temperature controller sends M-1 control silence signals; M is the solid-state relay to be controlled and has the smallest sorted value; the temperature controller ends sending control signals.

[0068] S2.44. Send a control mute signal according to the interval value between the solid-state relay to be controlled corresponding to the current control action signal and the previous solid-state relay to be controlled; then proceed to S2.45.

[0069] S2.45 Repeat steps S2.42-S2.45 until control action signals are sent to all solid-state relays to be controlled, and then send M-1 control silence signals; M is the solid-state relay to be controlled with the smallest sort value, and then the temperature controller ends sending control signals.

[0070] S2.44. After receiving the control action signal, the solid-state relay generates a pulse signal to control the heater to operate.

[0071] Table 1 shows the transmission path of the identification signal among multiple solid-state relays.

[0072]

[0073] Table 1

[0074] Refer to Table 1. Each time the temperature controller sends an identification signal or control signal, the solid-state relay will pass the received identification signal or control signal to the next solid-state relay.

[0075] Taking Table 1 as an example, if an identification signal is transmitted, then A1 is the identification action signal; B1, B2, B3 and B4 are the identification silence signals.

[0076] Specifically, the thermostat sends an activation signal, and the first solid-state relay responds, at which point the number of activated solid-state relays is 1. Then, the thermostat sends a silence signal, which is passed to the first solid-state relay. The activation signal is then passed to the second solid-state relay, which responds, bringing the number of activated solid-state relays to 2. The thermostat then continues sending silence signals, causing the activation signal to be passed to the next solid-state relay.

[0077] When the thermostat sends the fourth identification silence signal (B4), the identification silence signal is transmitted to the first solid-state relay, and the identification action signal is transmitted to the fifth solid-state relay. At this time, the number of solid-state relays identified is 5.

[0078] If the temperature controller continues to send the fifth identification silence signal, the identification silence signal is passed to the first solid-state relay, the identification action signal is passed on and there is no response, and the number of identified solid-state relays no longer increases; the total number of solid-state relays is determined to be 5 based on the maximum sorting value of 5 of the solid-state relays that receive the identification action signal at the end.

[0079] Table 2 shows the control signal transmission path for controlling a solid-state relay.

[0080]

[0081] Table 2

[0082] Taking Table 2 as an example, if the control signal is used to control a solid-state relay, then A1 is the control action signal; B1, B2, B3 and B4 are the control silence signals.

[0083] Specifically, the MCU determines the order of the number of solid-state relays to be controlled based on the temperature sensor feedback and the set value. If the fifth solid-state relay needs to be controlled, the temperature controller first sends a control action signal, and then sends four control silence signals. The control action signal and the four control silence signals are passed sequentially among the five solid-state relays. When the control action signal is passed to the fifth solid-state relay, the fifth solid-state relay responds to the control action signal and sends a pulse signal to drive the corresponding heater to start or stop.

[0084] Table 3 shows the control signal transmission paths for the first, second, and fourth solid-state relays.

[0085]

[0086] Table 3

[0087] Taking Table 3 as an example, when controlling multiple solid-state relays, if it is necessary to control the operation of the first, second, and fourth solid-state relays, then A1, A2, and A3 are the control action signals; B1 and B2 are the control silence signals.

[0088] Specifically, the MCU determines the order of the number of solid-state relays to be controlled based on the temperature sensor feedback and the set value; it determines that the interval value between the first and second solid-state relays is 0; and the interval value between the second and fourth solid-state relays is 1.

[0089] The maximum sorting value of the current solid-state relay to be controlled is 4, that is, the fourth solid-state relay is the solid-state relay to be controlled with the largest sorting value; the interval value between the solid-state relay to be controlled with the largest sorting value (the fourth solid-state relay) and the previous solid-state relay to be controlled (the second solid-state relay) is determined to be 1; then the temperature controller first sends a control silence signal (B1), then sends a control action signal (A1), and then sends a control silence signal (B2).

[0090] The thermostat sends another control action signal (A2). This current control action signal corresponds to the second solid-state relay. It is determined that the interval between the solid-state relay to be controlled (the second solid-state relay) and its previous solid-state relay to be controlled (the first solid-state relay) is 0. That is, the thermostat does not send a control silence signal at this time.

[0091] Then the thermostat sends another control action signal (A3), at which point all the solid-state relays to be controlled send control action signals; then it sends M-1 control silence signals. Since the solid-state relay to be controlled with the smallest sorted value is the first solid-state relay, M=1, M-1=0, meaning the thermostat does not send a control silence signal at this time. Then the thermostat stops sending control signals.

[0092] Table 4 shows the control signal transmission paths for controlling the second and fifth solid-state relays.

[0093]

[0094] Table 4

[0095] Taking Table 4 as an example, when controlling multiple solid-state relays, if it is necessary to control the operation of the second and fifth solid-state relays, then A1 and A2 are the control action signals; B1, B2 and B3 are the control silence signals.

[0096] Specifically, the MCU determines the order of the number of solid-state relays to be controlled based on the temperature sensor feedback and the set value; and determines the interval value of the silent solid-state relays between the second and fifth solid-state relays to be 2.

[0097] The maximum sorting value of the solid-state relay to be controlled is 5, that is, the fifth solid-state relay is the solid-state relay to be controlled with the largest sorting value; the interval value between the solid-state relay to be controlled with the largest sorting value (the fifth solid-state relay) and the previous solid-state relay to be controlled (the second solid-state relay) is determined to be 2; then the temperature controller first sends a control action signal (A1), and then sends two control silence signals (B1, B2).

[0098] The thermostat sends another control action signal (A2) to determine that the solid-state relay to be controlled is the one with the smallest sorted value. Then, the thermostat sends M-1 control silence signals. Since the solid-state relay to be controlled with the smallest sorted value is the second solid-state relay, M=2, M-1=1, meaning the thermostat sends one control silence signal. Then the thermostat stops sending control signals.

[0099] Each solid-state relay is connected to several heaters. In a preferred embodiment, the solid-state relay has eight independent output channels, each of which is connected to a heater. The solid-state relay independently controls the operation of each heater; each control signal controls the independent operation of the eight heaters.

[0100] The above method utilizes a communication line to connect a temperature controller and multiple solid-state relays in series. When a solid-state relay receives a new signal, it transmits the previously received signal to the next solid-state relay. The temperature controller sends several signals, which are transmitted sequentially among the solid-state relays according to the sending order. This transmission method is simple, has a low error rate, and the signals are transmitted directly between adjacent solid-state relays, resulting in fast signal transmission speed. Simultaneously, the temperature controller sends an identification action signal, an identification silence signal, a control action signal, and a control silence signal. The solid-state relays respond to the identification action signal to determine the number of solid-state relays, and respond to the control action signal to achieve control of the solid-state relays.

[0101] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0102] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0103] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A control method for a temperature control system, characterized in that: This is achieved through a temperature control system, which includes a temperature controller and solid-state relays. The temperature controller and multiple solid-state relays are connected in series via a communication line; the solid-state relays are connected to the heater. The control method of the temperature control system includes the following steps: S1. The temperature controller sends an identification signal. After the previous solid-state relay receives the new identification signal, it will pass the previously received identification signal to the next solid-state relay. The identification signal includes an identification action signal and an identification silence signal. The solid-state relay responds to the identification action signal. The number of solid-state relays is determined according to the maximum sorting value of the solid-state relays that respond to the identification action signal. S2. The temperature controller sends a control signal. After the previous solid-state relay receives the new control signal, it will pass the previously received control signal to the next solid-state relay. The control signal includes a control action signal and a control mute signal. The solid-state relay responds to the control action signal and then controls the start and stop of the corresponding heater.

2. The control method of the temperature control system according to claim 1, characterized in that: S1 specifically includes the following steps: S1.1 The temperature controller first sends an action recognition signal to the solid-state relay, and then sends several silence recognition signals to the solid-state relay in a loop; S1.

2. Each time the temperature controller sends an identification action signal or identification silence signal, the solid-state relay will pass the received identification action signal or identification silence signal to the next solid-state relay, and the solid-state relay will respond to the identification action signal. S1.3 Determine the total number of solid-state relays based on the maximum sorting value of the solid-state relays that identify the action signal at the end of the relay.

3. The control method of the temperature control system according to claim 1, characterized in that: In S2, controlling the operation of a solid-state relay includes the following steps: S2.1 Determine the sorting values ​​for the solid-state relays to be controlled; S2.2 The temperature controller first sends a control action signal, and then sends N-1 control silence signals; each time the temperature controller sends a control action signal or control silence signal, the solid-state relay will pass the received control action signal or control silence signal to the next solid-state relay; N is the sorting value of the solid-state relays to be controlled.

4. The control method of the temperature control system according to claim 1, characterized in that: In S2, controlling the operation of multiple solid-state relays includes the following steps: S2.3 Determine the sorting values ​​of multiple solid-state relays to be controlled and the interval values ​​of adjacent solid-state relays to be controlled; S2.4 According to the sorting value of each solid-state relay to be controlled and the interval value of the silent solid-state relay between adjacent solid-state relays to be controlled, the temperature controller alternately and cyclically sends control action signals and control silence signals corresponding to the number of interval values; each time the temperature controller sends a control action signal or control silence signal, the solid-state relay will pass the received control action signal or control silence signal to the next solid-state relay.

5. The control method of the temperature control system according to claim 4, characterized in that: S2.4 specifically includes the following steps: S2.41 The temperature controller alternately sends control action signals and control silence signals in the corresponding order according to the maximum sort value of the solid-state relay to be controlled. Then, it sends a number of control silence signals according to the interval between the solid-state relay to be controlled and the solid-state relay with the largest sort value and the previous solid-state relay to be controlled. S2.

42. The temperature controller sends another control action signal and determines whether the solid-state relay to be controlled corresponding to the current control action signal is the solid-state relay to be controlled and has the smallest sort value. If yes, proceed to S2.43; otherwise, proceed to S2.

44. S2.43, The temperature controller sends M-1 control silence signals; M is the solid-state relay to be controlled with the smallest sorted value; The temperature controller ends sending control signals; S2.

44. Send a control mute signal according to the interval value between the solid-state relay to be controlled corresponding to the current control action signal and the previous solid-state relay to be controlled; then proceed to S2.

45. S2.45 Repeat steps S2.42-S2.45 until control action signals are sent to all solid-state relays to be controlled, and then send M-1 control silence signals; M is the solid-state relay to be controlled with the smallest sort value, and then the temperature controller ends sending control signals.

6. The control method of the temperature control system according to claim 1, characterized in that: The action recognition signal is a non-zero value signal, and the silence recognition signal is a zero value signal.

7. The control method of the temperature control system according to claim 1, characterized in that: The control action signal is a non-zero value signal, and the control silence signal is a zero value signal.

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