Intelligent variable temperature control system and method

Abstract

The embodiment of the present invention proposes an intelligent temperature-changing control system and method. The intelligent temperature-changing control system includes a target space, a temperature-changing device, a sensing device, a temperature-sensing device, and a distribution device; the sensing device is used to sense whether a temperature-changing condition is triggered in the target space; the sensing device is used to send a trigger signal when sensing that a temperature-changing condition is triggered in the target space, and the temperature-sensing device is used to measure the current temperature of the target space and compare it with a set value when receiving the trigger signal; the temperature-sensing device is used to send a temperature-changing signal; the distribution device is used to receive the temperature-changing signal sent by the temperature-sensing device; the distribution device is used to formulate a temperature-changing strategy according to the total power of the circuit to control all temperature-changing devices to change temperature sequentially. The intelligent temperature-changing control system of the present invention can sense indoor occupants and the current room temperature, automatically control the temperature of the target space, and meet the temperature needs of indoor occupants, and the system formulates a temperature-changing strategy to control the normal operation of the circuit without overload.

Description

Technical Field

[0001] The present invention relates to the technical field of home automatic temperature control, and in particular to an intelligent temperature variable control system and method. Background Art

[0002] Existing indoor floor heating methods typically use copper or PVC pipes filled with hot water, buried beneath indoor floors or tiles. The same applies to cooling, where air conditioning is typically used to cool the entire room. However, this approach wastes energy when no one is inside. Therefore, in the context of promoting green and low-carbon development, there is a need for automated cooling or heating systems that can automatically control the temperature according to the needs of the occupants, thereby rationalizing and maximizing resource utilization.

[0003] At the same time, when using high-power heating or cooling appliances at home, due to the power limitation of the circuit itself, it is necessary to control the usage and power of the appliances to prevent overload. However, in most cases, the connected power of the appliances is not controlled, thereby triggering overload protection. Therefore, the automatic cooling or heating system is also required to reasonably distribute the power when working to protect the normal operation of the circuit. Summary of the Invention

[0004] The embodiments of the present invention provide an intelligent temperature variable control system and method to solve one or more technical problems encountered in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides an intelligent temperature control system, comprising:

[0006] At least one target space, wherein one temperature changing device is correspondingly provided for each target space;

[0007] a sensing device, the sensing device being connected to the target space and configured to sense whether a temperature change condition is triggered in the target space;

[0008] a temperature sensing device connected to the target space, electrically connected to the sensing device, configured to send a trigger signal when sensing that a temperature change condition is triggered in the target space, and configured to measure the current temperature of the target space and compare it with a set value upon receiving the trigger signal; and to send a temperature change signal when the current temperature does not meet the set value;

[0009] A distribution device, the distribution device is connected to the temperature sensing device, the distribution device is used to receive the temperature change signal sent by the temperature sensing device; the distribution device is connected to the temperature changing device, the distribution device is used to formulate a temperature change strategy according to the total power of the circuit, so as to control all the temperature changing devices to trigger the temperature change condition and the target space whose current temperature does not meet the set value is given priority for sequential temperature change; the distribution device includes:

[0010] a priority output unit connected to the temperature sensing device, configured to select the corresponding target space according to the temperature change signal sent by the temperature sensing device, and use the rated operating power of the temperature change device corresponding to the selected target space as the priority output power;

[0011] a circulation output unit, the circulation output unit being connected to the priority output unit, the circulation output unit being used to obtain the remaining power after deducting the priority output power from the total circuit power, and when the remaining power is greater than the rated power of one of the remaining temperature-changing devices, the circulation output unit being used to use the rated operating power of the current temperature-changing device as the circulation output power; and when the remaining power is less than the rated power of one of the remaining temperature-changing devices, the circulation output unit being used to use the remaining power as the circulation output power;

[0012] An execution module is connected to the priority output unit, the cycle output unit and the temperature change device respectively; the execution module is used to use the priority output power as the temperature change strategy to give priority to the temperature change of the corresponding temperature change device; the execution module is used to set a cycle time to use the cycle output power as the temperature change strategy to change the temperature of each of the remaining target spaces.

[0013] In a preferred embodiment, the dispensing device comprises:

[0014] a preheating output unit, the preheating output unit being connected to the priority output unit, the preheating output unit being used to select the remaining target space and use the duty operating power of the selected remaining target space as the preheating output power;

[0015] An execution module is connected to the priority output unit, the preheating output unit and the temperature change device respectively. The execution module is used to match the priority output power and the preheating output power with the temperature change device corresponding to the target space and output them as a temperature change strategy for temperature change.

[0016] In a preferred embodiment, when the rated total power of all the temperature changing devices is greater than the total circuit power, the preheating output unit is used to select the remaining target space; the preheating output unit is used to obtain the remaining power after deducting the priority output power from the total circuit power, and allocate the remaining power to the remaining target space as the preheating output power.

[0017] In a preferred embodiment, when the temperature change information contains two or more target spaces that trigger temperature change conditions, the priority output unit is used to use all target spaces that trigger temperature change conditions as priority output spaces, and perform cyclic power output at the rated power of each temperature change device within one cycle time.

[0018] In a preferred embodiment, when the total power of the circuit is less than the rated power of any of the temperature changing devices, the distribution device includes:

[0019] a circulation output unit, the circulation output unit being connected to the temperature sensing device and configured to receive the temperature change signal and use the total circuit power as the circulation output power;

[0020] An execution module is connected to the cycle output unit and the temperature change device respectively, and is used to perform cycle power output on all the target spaces in succession within the same cycle time to change the temperature according to the temperature change strategy.

[0021] One of the above technical solutions has the following advantages or beneficial effects: it can sense the occupants of a room and the current room temperature, automatically controlling the target space's temperature to meet the occupants' needs, thereby rationalizing and maximizing resource utilization. Furthermore, the system develops a temperature change strategy to ensure normal operation of the control circuit without overload.

[0022] In a second aspect, an embodiment of the present invention provides an intelligent temperature control method, including:

[0023] identifying at least one target space;

[0024] sensing whether a temperature change condition is triggered in the target space, and sending a trigger signal when sensing that the temperature change condition is triggered in the target space;

[0025] When receiving the trigger signal, measuring the current temperature of the target space and comparing it with the set value; when the current temperature does not meet the set value, sending a temperature change signal;

[0026] Receive the sent temperature change signal, formulate a temperature change strategy according to the total power of the circuit, and control all temperature change devices to trigger the temperature change condition and the temperature change device corresponding to the target space whose current temperature does not meet the set value is prioritized for sequential temperature change; formulating the temperature change strategy according to the total power of the circuit includes:

[0027] Selecting the corresponding target space according to the sent temperature change signal, and using the rated working power of the temperature change device corresponding to the selected target space as the priority output power;

[0028] Using the priority output power as a temperature change strategy to perform priority temperature change on the corresponding temperature change device;

[0029] Obtaining the remaining power after deducting the priority output power from the total circuit power; when the remaining power is greater than the rated power of one of the remaining temperature-changing devices, using the rated operating power of the current temperature-changing device as the circulating output power; and when the remaining power is less than the rated power of one of the remaining temperature-changing devices, using the remaining power as the circulating output power;

[0030] A cycle time is set to change the temperature of the temperature changing device corresponding to each of the remaining target spaces using a cyclic output power as a temperature changing strategy.

[0031] In a preferred embodiment, formulating a temperature change strategy according to the total power of the circuit includes:

[0032] Selecting the corresponding target space according to the sent temperature change signal, and taking the rated working power of the temperature change device corresponding to the selected target space as the priority output power;

[0033] Select the remaining target space, and use the duty operating power of the selected remaining target space as the preheating output power;

[0034] The priority output power and the preheating output power are matched with the temperature changing device corresponding to the target space and then used as the temperature changing strategy output to change the temperature.

[0035] In a preferred embodiment, formulating a temperature change strategy according to the total power of the circuit includes:

[0036] receiving the temperature change signal and using the total circuit power as the circulating output power;

[0037] The temperature of all the target spaces is changed by cycling the power output in succession within the same cycle time as a temperature change strategy.

[0038] One of the above technical solutions has the following advantages or beneficial effects: it can sense the occupants of a room and the current room temperature, automatically controlling the target space's temperature to meet the occupants' needs, thereby rationalizing and maximizing resource utilization. Furthermore, the system develops a temperature change strategy to ensure normal operation of the control circuit without overload.

[0039] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed herein and should not be construed as limiting the scope of the invention.

[0041] Figure 1 A schematic diagram of the structural connection of an intelligent temperature variable control system according to an embodiment of the present invention is shown.

[0042] Figure 2 A structural connection diagram of a distribution device in an intelligent temperature variable control system according to an embodiment of the present invention is shown.

[0043] Figure 3 Another structural connection diagram of the distribution device in the intelligent temperature variable control system according to an embodiment of the present invention is shown.

[0044] Figure 4 A schematic diagram of the steps of an intelligent temperature variable control method according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0045] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0046] Figure 1 A schematic diagram of the structural connection of an intelligent temperature variable control system according to an embodiment of the present invention is shown.

[0047] In a first aspect, an embodiment of the present invention provides an intelligent variable temperature control system, comprising at least one target space 110 , a sensing device 130 , a temperature sensing device 140 and a distribution device 150 .

[0048] One temperature changing device 120 is correspondingly provided for each target space 110 , and each temperature changing device 120 only controls the temperature of the corresponding target space 110 and does not affect the temperature of other spaces.

[0049] The sensing device 130 is connected to the target space 110 . The sensing device 130 is used to sense whether a temperature change condition is triggered in the target space 110 . Each target space 110 corresponds to one sensing device 130 .

[0050] The temperature sensing device 140 is connected to the target space 110, and each target space 110 corresponds to a temperature sensing device 140. The temperature sensing device 140 is electrically connected to the sensing device 130. The sensing device 130 is used to send a trigger signal when it senses that a temperature change condition is triggered in the target space 110. The temperature sensing device 140 is used to measure the current temperature of the target space 110 of the trigger condition when receiving the trigger signal and compare it with the set value; when the current temperature does not meet the set value, which includes but is not limited to being lower than the set temperature and requiring heating or higher than the set temperature and requiring cooling, the temperature sensing device 140 is used to send a temperature change signal.

[0051] The distribution device 150 is connected to the temperature sensing device 140, and the distribution device 150 is used to receive the temperature change signal sent by the temperature sensing device 140; the distribution device 150 is connected to the temperature changing device 120, and the distribution device 150 is used to formulate a temperature change strategy according to the total power of the circuit to control all the temperature changing devices 120 to trigger the temperature change conditions and the target space 110 whose current temperature does not meet the set value is prioritized for sequential temperature change. Under normal circumstances, the total circuit power has an upper limit, and the working order and method of the temperature changing device 120 need to be controlled according to actual conditions.

[0052] This embodiment of the intelligent temperature control system can sense the presence of people in a room and the current room temperature, automatically controlling the target space's temperature to meet the needs of the occupants, thereby rationalizing and maximizing resource utilization. Furthermore, the system develops a temperature control strategy to ensure normal operation of the control circuit without overload.

[0053] In a specific embodiment, see Figure 2 As shown, the allocation device 150 includes a priority output unit 151 , a preheating output unit 152 and an execution module 153 .

[0054] The priority output unit 151 is connected to the temperature sensing device 140. The priority output unit 151 is used to select the corresponding target space 110 according to the temperature change signal sent by the temperature sensing device 140, and use the rated working power of the temperature changing device 120 corresponding to the selected target space 110 as the priority output power. This can ensure that the selected target space can be changed in temperature as quickly as possible to meet the user's temperature requirements.

[0055] The preheating output unit 152 is connected to the priority output unit 151. The preheating output unit 152 is used to select the remaining target space 110, and use the on-duty operating power of the selected remaining target space 110 as the preheating output power. The on-duty operating power means that the temperature changing device 120 operates at the lowest power or the maximum actual power that can be obtained, so that the corresponding target space 110 changes temperature at a slow speed to preheat for subsequent temperature increase.

[0056] The execution module 153 is connected to the priority output unit 151, the preheating output unit 152 and the temperature change device 120 respectively. The execution module 153 is used to match the priority output power and the preheating output power with the temperature change device 120 corresponding to the target space 110 and output them as the temperature change strategy for temperature change.

[0057] In a specific embodiment, when the rated total power of all temperature change devices 120 is greater than the total circuit power, the preheating output unit 152 is used to select the remaining target space 110; the preheating output unit 152 is used to obtain the remaining power after deducting the priority output power from the total circuit power, and allocate the remaining power to the remaining target space 120 as the preheating output power.

[0058] In a specific embodiment, see Figure 3 As shown, the allocation device 150 includes a priority output unit 151 , a cycle output unit 154 and an execution module 153 .

[0059] The priority output unit 151 is connected to the temperature sensing device 140. The priority output unit 151 is used to select the corresponding target space 110 according to the temperature change signal sent by the temperature sensing device 140, and use the rated working power of the temperature change device 120 corresponding to the selected target space 110 as the priority output power.

[0060] The cyclic output unit 154 is connected to the priority output unit 151. The cyclic output unit 154 is used to obtain the remaining power after deducting the priority output power from the total circuit power. When the remaining power is greater than the rated power of one of the remaining temperature changing devices 120, the cyclic output unit is used to use the rated working power of the current temperature changing device 120 as the cyclic output power; when the remaining power is less than the rated power of one of the remaining temperature changing devices 120, the cyclic output unit is used to use the remaining power as the cyclic output power.

[0061] The execution module 153 is connected to the priority output unit 151, the cycle output unit 154 and the temperature change device 120 respectively; the execution module 153 is used to use the priority output power as the temperature change strategy to give priority to the temperature change of the corresponding temperature change device 120; the execution module 153 is used to set a cycle time to use the cycle output power as the temperature change strategy to change the temperature of the temperature change device 120 corresponding to each remaining target space 110, that is, the temperature change device 120 that meets the rated power works at the rated power within one cycle, and the temperature change device 120 that does not meet the rated power works at the current maximum power within one cycle.

[0062] In a specific embodiment, when the temperature change information contains two or more target spaces 110 that trigger the temperature change conditions, the priority output unit is used to take all target spaces 110 that trigger the temperature change conditions as priority output spaces, and to perform cyclic power output at the rated power of each temperature change device 120 within one cycle time, so as to ensure that each target space 110 that triggers the temperature change conditions can be quickly changed in temperature.

[0063] In a specific embodiment, see Figure 3 As shown, when the total power of the circuit is less than the rated power of any temperature changing device 120 , the distribution device 150 includes a cycle output unit 154 and an execution module 153 .

[0064] The circulation output unit 154 is connected to the temperature sensing device 140 . The circulation output unit 154 is used to receive the temperature change signal and use the total circuit power as the circulation output power.

[0065] The execution module 153 is connected to the cyclic output unit 154 and the temperature-changing device 140. The execution module 153 is configured to sequentially cycle the power output to all target spaces 120 within the same cycle time to implement a temperature-changing strategy. If the total circuit power is insufficient to support the rated power operation of a temperature-changing device 120, each temperature-changing device 120 is cycled and activated in a multi-cycle manner at the maximum power of the circuit.

[0066] In a second aspect, an embodiment of the present invention provides an intelligent temperature control method, including:

[0067] Step S110: Determine at least one target space.

[0068] Step S120: sensing whether a temperature change condition is triggered in the target space, and sending a trigger signal when sensing that the temperature change condition is triggered in the target space.

[0069] Step S130: upon receiving the trigger signal, the current temperature of the target space is measured and compared with the set value; when the current temperature does not meet the set value, a temperature change signal is sent.

[0070] Step S140: Receive the sent temperature change signal, formulate a temperature change strategy according to the total power of the circuit, and control all temperature change devices to trigger the temperature change condition and prioritize the temperature change devices corresponding to the target space whose current temperature does not meet the set value.

[0071] This embodiment of the intelligent temperature control method can sense the presence of people in a room and the current room temperature, automatically controlling the target space's temperature to meet the needs of the people inside, thereby rationalizing and maximizing resource utilization. Furthermore, the system formulates a temperature control strategy to ensure normal operation of the control circuit without overload.

[0072] In a specific embodiment, formulating a temperature change strategy according to the total power of the circuit includes:

[0073] Select the corresponding target space according to the sent temperature change signal, and use the rated working power of the temperature change device corresponding to the selected target space as the priority output power;

[0074] Select the remaining target space, and use the on-duty operating power of the selected remaining target space as the preheating output power;

[0075] The priority output power and preheating output power are matched with the temperature changing device corresponding to the target space and then used as the temperature changing strategy output to change the temperature;

[0076] In a specific embodiment, formulating a temperature change strategy according to the total power of the circuit includes:

[0077] Select the corresponding target space according to the sent temperature change signal, and use the rated working power of the temperature change device corresponding to the selected target space as the priority output power;

[0078] Taking the priority output power as the temperature change strategy to prioritize the temperature change of the corresponding temperature change device;

[0079] Obtain the remaining power after deducting the priority output power from the total circuit power. When the remaining power is greater than the rated power of one of the remaining temperature-changing devices, the rated operating power of the current temperature-changing device is used as the circulating output power. When the remaining power is less than the rated power of one of the remaining temperature-changing devices, the remaining power is used as the circulating output power.

[0080] Set a cycle time to change the temperature of the temperature changing device corresponding to each remaining target space using the cycle output power as the temperature changing strategy;

[0081] In a specific embodiment, formulating a temperature change strategy according to the total power of the circuit includes:

[0082] Receive temperature change signal and use total circuit power as circulating output power;

[0083] The power output of all target spaces is cycled in succession within the same cycle time to change the temperature as a temperature change strategy.

[0084] In the description of this specification, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless otherwise inconsistent.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0086] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. An intelligent temperature control system, characterized in that: include: At least one target space, wherein one temperature changing device is correspondingly provided for each target space; a sensing device, the sensing device being connected to the target space and configured to sense whether a temperature change condition is triggered in the target space; a temperature sensing device connected to the target space, electrically connected to the sensing device, configured to send a trigger signal when sensing that a temperature change condition is triggered in the target space, and configured to measure the current temperature of the target space and compare it with a set value upon receiving the trigger signal; and to send a temperature change signal when the current temperature does not meet the set value; a distribution device, the distribution device being connected to the temperature sensing device and configured to receive a temperature change signal sent by the temperature sensing device; The distribution device is connected to the temperature changing device, and is used to formulate a temperature changing strategy according to the total power of the circuit to control all the temperature changing devices to trigger the temperature changing condition and the target space whose current temperature does not meet the set value is the corresponding temperature changing device for priority sequential temperature changing; wherein, the distribution device includes: a priority output unit connected to the temperature sensing device, configured to select the corresponding target space according to the temperature change signal sent by the temperature sensing device, and use the rated operating power of the temperature change device corresponding to the selected target space as the priority output power; a circulation output unit, the circulation output unit being connected to the priority output unit, the circulation output unit being used to obtain the remaining power after deducting the priority output power from the total circuit power, and when the remaining power is greater than the rated power of one of the remaining temperature-changing devices, the circulation output unit being used to use the rated operating power of the current temperature-changing device as the circulation output power; and when the remaining power is less than the rated power of one of the remaining temperature-changing devices, the circulation output unit being used to use the remaining power as the circulation output power; An execution module is connected to the priority output unit, the cycle output unit and the temperature change device respectively; the execution module is used to use the priority output power as the temperature change strategy to give priority to the temperature change of the corresponding temperature change device; the execution module is used to set a cycle time to use the cycle output power as the temperature change strategy to change the temperature of each of the remaining target spaces.

2. The intelligent temperature control system according to claim 1, characterized in that: The dispensing device comprises: a preheating output unit, the preheating output unit being connected to the priority output unit, the preheating output unit being used to select the remaining target space and use the duty operating power of the selected remaining target space as the preheating output power; An execution module is connected to the priority output unit, the preheating output unit and the temperature change device respectively. The execution module is used to match the priority output power and the preheating output power with the temperature change device corresponding to the target space and output them as a temperature change strategy for temperature change.

3. The intelligent temperature control system according to claim 2, characterized in that: When the rated total power of all the temperature-changing devices is greater than the total circuit power, the preheating output unit is used to select the remaining target space; the preheating output unit is used to obtain the remaining power after deducting the priority output power from the total circuit power, and allocate the remaining power to the remaining target space as the preheating output power.

4. The intelligent temperature control system according to claim 1, characterized in that: When the temperature change information contains two or more target spaces that trigger the temperature change conditions, the priority output unit is used to treat all target spaces that trigger the temperature change conditions as priority output spaces, and perform cyclic power output at the rated power of each temperature change device within one cycle time.

5. The intelligent temperature control system according to claim 1, characterized in that: When the total power of the circuit is less than the rated power of any of the temperature changing devices, the distribution device includes: a circulation output unit, the circulation output unit being connected to the temperature sensing device and configured to receive the temperature change signal and use the total circuit power as the circulation output power; An execution module is connected to the cycle output unit and the temperature change device respectively, and is used to perform cycle power output on all the target spaces in succession within the same cycle time to change the temperature according to the temperature change strategy.

6. An intelligent temperature control method, characterized in that: include: identifying at least one target space; sensing whether a temperature change condition is triggered in the target space, and sending a trigger signal when sensing that the temperature change condition is triggered in the target space; When receiving the trigger signal, measuring the current temperature of the target space and comparing it with the set value; when the current temperature does not meet the set value, sending a temperature change signal; Receive the sent temperature change signal, formulate a temperature change strategy according to the total power of the circuit, and control all temperature change devices to trigger the temperature change condition and prioritize the temperature change of the target space whose current temperature does not meet the set value; The temperature change strategy formulated according to the total power of the circuit includes: Selecting the corresponding target space according to the sent temperature change signal, and using the rated working power of the temperature change device corresponding to the selected target space as the priority output power; Using the priority output power as a temperature change strategy to perform priority temperature change on the corresponding temperature change device; Obtaining the remaining power after deducting the priority output power from the total circuit power; when the remaining power is greater than the rated power of one of the remaining temperature-changing devices, using the rated operating power of the current temperature-changing device as the circulating output power; and when the remaining power is less than the rated power of one of the remaining temperature-changing devices, using the remaining power as the circulating output power; A cycle time is set to change the temperature of the temperature changing device corresponding to each of the remaining target spaces using a cyclic output power as a temperature changing strategy.

7. The intelligent temperature control method according to claim 6, characterized in that: The temperature change strategy formulated according to the total power of the circuit includes: Selecting the corresponding target space according to the sent temperature change signal, and using the rated working power of the temperature change device corresponding to the selected target space as the priority output power; Select the remaining target space, and use the duty operating power of the selected remaining target space as the preheating output power; The priority output power and the preheating output power are matched with the temperature changing device corresponding to the target space and then used as the temperature changing strategy output to perform temperature changing.

8. The intelligent temperature control method according to claim 6, wherein: The temperature change strategy formulated according to the total power of the circuit includes: receiving the temperature change signal and using the total circuit power as the circulating output power; The temperature of all the target spaces is changed by cycling the power output in succession within the same cycle time as a temperature change strategy.

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