Heat transfer printer and heating control device and method therefor

Abstract

The embodiment of the present application provides a heat transfer printing machine and a heating control device and method thereof, the device comprises: a temperature detection module for detecting the ambient temperature around the heat transfer printing machine and outputting the actual ambient temperature value obtained by detection; a data processing module connected with the temperature detection module, which is internally provided with a data table reflecting the correspondence between the actual ambient temperature value and the target heating time and the target heating power, for determining and outputting the target heating time and the target heating power for raising the heating temperature of the heating plate of the heat transfer printing machine to the preset target temperature according to the actual ambient temperature value and the data table; and a temperature rising control module connected with the data processing module and the heating plate respectively, for controlling the heating plate to work according to the target heating time and the target heating power to make the heating temperature of the heating plate reach and maintain at the preset target temperature. The embodiment has high control efficiency and fast heating speed.

Description

Technical Field

[0001] This invention relates to the field of heat transfer printing technology, and more particularly to a heat transfer printing machine and its heating control device and method. Background Technology

[0002] A heat transfer machine is a device that can transfer various patterns (such as color marks, portrait photos, and landscape patterns) onto various substrates (such as various fabrics, ceramic plates, and metal plates) using heat. Typically, a heat transfer machine achieves the heat transfer process by controlling the heating plate to heat up to a set temperature.

[0003] One existing heating control method for a heat transfer machine is to control the heating power of the heating plate of the heat transfer machine. Specifically, during the process of controlling the heating plate to rise, the actual temperature of the heating plate is repeatedly sampled, and then the heating power of the heating plate is adjusted based on the actual temperature feedback, so that the temperature of the heating plate reaches and is maintained at the preset temperature.

[0004] However, the inventors found in practice that the above control method has relatively low control efficiency because it requires repeated sampling of the actual temperature of the heating plate and repeated control of the heating power of the heating plate. The temperature of the heating plate rises slowly, and the user has to wait a long time for heat transfer. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a heating control device for a heat transfer machine that has high control efficiency and fast heating speed.

[0006] The technical problem to be further solved by the embodiments of the present invention is to provide a heat transfer machine with high control efficiency and fast heating speed.

[0007] The technical problem to be further solved by the embodiments of the present invention is to provide a heating control method for a heat transfer machine that has high control efficiency and fast heating speed.

[0008] To address the aforementioned technical problems, the present invention first provides the following technical solution: a heating control device for a heat transfer machine, comprising:

[0009] The temperature detection module is used to detect the ambient temperature around the heat transfer machine and output the actual ambient temperature value obtained from the detection.

[0010] The data processing module, connected to the temperature detection module, has a built-in data table reflecting the actual ambient temperature value and the target heating time and target heating power. It is used to determine and output the target heating time and target heating power for raising the heating plate of the heat transfer machine to a preset target temperature based on the actual ambient temperature value and the data table; and

[0011] The heating control module is connected to the data processing module and the heating plate respectively, and is used to control the heating plate to power on according to the target heating time and target heating power so that the heating temperature of the heating plate reaches and is maintained at the preset target temperature.

[0012] Furthermore, the temperature control module includes:

[0013] The first control unit is connected to the data processing module and the heating plate respectively, and is used to control the heating plate to power on and work according to the target heating power.

[0014] A timing unit, connected to the first control unit, is used to count the actual duration for which the heating plate continuously operates under power according to the target heating power. When the actual duration reaches a predetermined duration threshold, a power change signal is output. The ratio of the predetermined duration threshold to the target heating duration is a first predetermined ratio.

[0015] The second control unit is connected to the timing unit and the heating plate respectively, and is used to control the actual heating power of the heating plate to decrease from the target heating power to the predetermined heating power according to the power change signal so that the actual heating temperature of the heating plate reaches and is maintained at the preset target temperature. The ratio of the predetermined heating power to the target heating power is a second predetermined ratio.

[0016] Furthermore, the temperature control module also includes:

[0017] The curve storage unit is connected to the first control unit and the second control unit respectively, and is used to pre-store the time-power curve calculated based on the target heating time, target heating power, first predetermined ratio and second predetermined ratio. The first control unit and the second control unit control the heating plate to power on and work according to the time-power curve.

[0018] Furthermore, the data table is calculated based on Joule's law and the specific heat capacity formula.

[0019] On the other hand, in order to solve the above-mentioned technical problems, the present invention provides the following technical solution: a heat transfer machine, including a heating plate and a heating control device connected to the heating plate, wherein the heating control device is the heating control device as described in any of the above claims.

[0020] Furthermore, to address the aforementioned technical problems, this invention provides the following technical solution: a heating control method for a heat transfer machine, comprising the following steps:

[0021] Detects the ambient temperature around the heat transfer machine and outputs the actual ambient temperature value obtained from the detection.

[0022] Based on the actual ambient temperature value and a data table reflecting the correspondence between the actual ambient temperature value and the target heating time and target heating power, the target heating time and target heating power for raising the heating plate of the heat transfer machine to the preset target temperature are determined and output; and

[0023] The heating plate is powered on according to the target heating time and target heating power to make the heating plate reach and maintain the preset target temperature.

[0024] Furthermore, controlling the heating plate to power on according to the target heating time and target heating power to achieve and maintain the heating temperature of the heating plate at the preset target temperature specifically includes:

[0025] The heating plate is controlled to power on and operate according to the target heating power;

[0026] The actual duration for which the heating plate continuously operates based on the target heating power is statistically analyzed. When the actual duration reaches a predetermined duration threshold, a power change signal is output. The ratio of the predetermined duration threshold to the target heating duration is a first predetermined ratio.

[0027] The actual heating power of the heating plate is controlled to decrease from the target heating power to a predetermined heating power according to the power change signal, so that the actual heating temperature of the heating plate reaches and is maintained at the preset target temperature. The ratio of the predetermined heating power to the target heating power is a second predetermined ratio.

[0028] Furthermore, the heating plate is powered on and operated based on a pre-stored time-power curve calculated using the target heating duration, target heating power, first predetermined ratio, and second predetermined ratio.

[0029] Furthermore, the data table is calculated based on Joule's law and the specific heat capacity formula.

[0030] After adopting the above technical solution, the embodiments of the present invention have at least the following beneficial effects: The embodiments of the present invention use a temperature detection module to detect the ambient temperature around the heat transfer machine before powering on the heating plate of the heat transfer machine and output the detected actual ambient temperature value. The data processing module uses the actual ambient temperature value and a pre-stored data table to determine the target heating time and target heating power to raise the heating temperature of the heating plate to the preset target temperature. Then, the heating control module uses a heating control module to control the heating plate to power on and work according to the target heating time and target heating power to achieve heating. The control efficiency is relatively high, and there is no need to frequently detect the actual temperature of the heating plate. Compared with traditional heating control methods, the heating time is relatively more stable and the heating efficiency is higher. Attached Figure Description

[0031] Figure 1This is a schematic diagram of an optional embodiment of the heat transfer printer of the present invention.

[0032] Figure 2 This is a schematic diagram of another optional embodiment of the heat transfer printer of the present invention.

[0033] Figure 3 This is a time-power curve of an optional embodiment of the heating control device for the heat transfer machine of the present invention.

[0034] Figure 4 This is a flowchart of an optional embodiment of the heating control method for the heat transfer machine of the present invention.

[0035] Figure 5 The flowchart below shows a specific step S3 of an optional embodiment of the heating control method for the heat transfer machine of the present invention. Detailed Implementation

[0036] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0037] like Figure 1 As shown, an optional embodiment of the present invention provides a heating control device 1 for a heat transfer machine, comprising:

[0038] Temperature detection module 10 is used to detect the ambient temperature around the heat transfer machine and output the actual ambient temperature value obtained from the detection.

[0039] Data processing module 12, connected to temperature detection module 10, has a built-in data table reflecting the actual ambient temperature value and the target heating time and target heating power. It is used to determine and output the target heating time and target heating power for raising the heating plate 3 of the heat transfer machine to a preset target temperature based on the actual ambient temperature value and the data table; and

[0040] The heating control module 14 is connected to the data processing module 12 and the heating plate 3 respectively, and is used to control the heating plate 3 to power on and operate according to the target heating time and target heating power so that the heating temperature of the heating plate 3 reaches and is maintained at the preset target temperature.

[0041] In this embodiment of the invention, the temperature detection module 10 detects the ambient temperature around the heat transfer machine before the heating plate 3 of the heat transfer machine is powered on and outputs the actual ambient temperature value. The data processing module 12 determines the target heating time and target heating power to raise the heating temperature of the heating plate 3 to the preset target temperature based on the actual ambient temperature value and the pre-stored data table. Then, the heating control module 14 controls the heating plate 3 to power on and work according to the target heating time and target heating power to achieve heating. The control efficiency is relatively high, and there is no need to frequently detect the actual temperature of the heating plate 3. Compared with the traditional heating control method, the heating time is relatively more stable and the heating efficiency is higher.

[0042] In specific implementation, to achieve temperature detection, the temperature detection module 10 can be implemented using temperature sensing elements such as temperature sensors; to achieve data comparison and output, the data processing module 12 can be implemented using processing chips such as microcontrollers with simple data processing functions; to achieve power control of the heating plate 3, the heating control module 14 and the first control unit 141 and the second control unit 145 described below can all be implemented using control elements such as power controllers. Of course, the power of the heating plate 3 can also be indirectly adjusted by using a current controller to adjust the working current of the heating plate 3; and to achieve timing, the timing unit 143 can be implemented using circuits such as timers.

[0043] In an optional embodiment of the present invention, such as Figure 2 As shown, the heating control module 14 includes:

[0044] The first control unit 141 is connected to the data processing module 12 and the heating plate 3 respectively, and is used to control the heating plate 3 to power on and work according to the target heating power.

[0045] Timing unit 143, connected to the first control unit 141, is used to count the actual duration for which the heating plate 3 continuously operates under power according to the target heating power. When the actual duration reaches a predetermined duration threshold, it outputs a power change signal. The ratio of the predetermined duration threshold to the target heating duration is a first predetermined ratio.

[0046] The second control unit 145 is connected to the timing unit 143 and the heating plate 3 respectively, and is used to control the actual heating power of the heating plate 3 to decrease from the target heating power to the predetermined heating power according to the power change signal so that the actual heating temperature of the heating plate 3 reaches and is maintained at the preset target temperature. The ratio of the predetermined heating power to the target heating power is a second predetermined ratio.

[0047] In this embodiment, the first control unit 141 first controls the heating plate 3 to be powered on according to the target heating power, so that the heating temperature of the heating plate 3 continues to rise steadily. Since the heating plate 3 of the heat transfer machine is usually made of resistance wire and heating aluminum plate, it takes a certain amount of time for the resistance wire to conduct heat to the heat-conducting aluminum plate. Therefore, the heat of the resistance wire is usually slightly higher than the temperature of the heating aluminum plate. So when the timing unit 143 determines that the actual duration of continuous power-on operation according to the target heating power reaches the predetermined duration threshold, the second control unit 145 controls the actual heating power of the heating plate 3 to be reduced from the target heating power to the predetermined heating power, thereby improving the utilization rate of electrical energy and avoiding the temperature on the actual heating aluminum plate being higher than the preset target temperature due to the time difference of heat transfer.

[0048] In specific implementation, the first predetermined ratio is usually 70%-90%, preferably 90%, and the second predetermined ratio is 20%-50%, preferably 50%. For example, when the determined target heating time is 10 seconds and the target heating power is 50W, the predetermined time threshold is 9 seconds and the predetermined heating power is 25W.

[0049] In an optional embodiment of the present invention, such as Figure 2 As shown, the heating control module 14 further includes:

[0050] Curve storage unit 147, connected to the first control unit 141 and the second control unit 145 respectively, is used to pre-store time-power curves calculated based on the target heating time and the first predetermined ratio and the second predetermined ratio of the target heating power. The first control unit 141 and the second control unit 145 respectively calculate and generate time-power curves based on the time-power curves (e.g., time-power curves calculated based on the target heating time and the target heating power). Figure 3 (As shown) The heating plate 3 is powered on and put into operation. In this embodiment, a time-power curve is generated in advance based on parameters such as the target heating time, target heating power, first predetermined ratio, and second predetermined ratio. During the specific control process, the first control unit 141 and the second control unit 145 directly control the heating plate 3 based on the time-power curve, making the control simpler and eliminating the need for frequent calculations. Figure 3 As shown in the figure, P1 represents the target heating power, P2 represents the predetermined heating power, t1 represents the predetermined duration threshold, and t2 represents the target heating duration.

[0051] In addition, since the target heating time and target heating power are different for different actual ambient temperature values, the curve storage unit 147 stores multiple time-power curves, each of which corresponds to a different actual ambient temperature value.

[0052] In an optional embodiment of the present invention, the data table is calculated based on Joule's law and the specific heat capacity formula. In this embodiment, the heating power supply circuit of the heating plate 3 is usually regarded as a purely resistive circuit. In a purely resistive circuit, the target heating time and target heating power can be quickly and easily calculated based on the actual ambient temperature value and the preset target temperature using Joule's law and the specific heat capacity formula.

[0053] In practical implementation, let the heating power of heating plate 3 be P, the heating time be t, the specific heat capacity be c, the mass be m, the actual ambient temperature be T1, and the preset target temperature be T2. Then, according to Joule's law, we have the following formula:

[0054] Q = Pt (Formula 1);

[0055] Based on specific heat capacity, the following formula applies:

[0056] Q = cm(T2 - T1) (Formula 2);

[0057] In both formulas above, Q represents the heat change of heating plate 3. Without considering heat loss, formulas 1 and 2 are equal, thus yielding:

[0058] Pt=cm(T2-T1)(Formula 3)

[0059] Given the preset target temperature T2, the specific heat capacity of the heating plate 3 is c, and its mass is m, a table showing the correspondence between the actual ambient temperature T1 and the heating power P and heating time t can be obtained.

[0060] On the other hand, such as Figure 1 As shown in the figure, this embodiment of the invention provides another heat transfer machine, including a heating plate 3 and a heating control device 1 connected to the heating plate 3. The heating control device 1 is the heating control device as described in any of the above embodiments. In this embodiment, the heat transfer machine uses the heating control device 1 as described above, which has high control efficiency and fast heating speed.

[0061] On the other hand, such as Figure 4 As shown in the figure, this embodiment of the invention further provides a heating control method for a heat transfer machine, including the following steps:

[0062] S1: Detects the ambient temperature around the heat transfer machine and outputs the actual ambient temperature value obtained from the detection; and

[0063] S2: Based on the actual ambient temperature value and the data table reflecting the actual ambient temperature value and the target heating time and target heating power, determine and output the target heating time and target heating power for raising the heating plate 3 of the heat transfer machine to the preset target temperature; and

[0064] S3: Control the heating plate 3 to power on according to the target heating time and target heating power so that the heating temperature of the heating plate 3 reaches and is maintained at the preset target temperature.

[0065] In this embodiment of the invention, the ambient temperature around the heat transfer machine is detected before the heating plate 3 of the heat transfer machine is powered on, and the actual ambient temperature value is output. Then, based on the actual ambient temperature value and the pre-stored data table, the target heating time and target heating power for raising the heating temperature of the heating plate 3 to the preset target temperature are determined. Thus, the heating plate 3 is controlled to power on and work according to the target heating time and target heating power to achieve heating. The control efficiency is relatively high, and there is no need to frequently detect the actual temperature of the heating plate 3. Compared with traditional heating control methods, the heating time is relatively more stable and the heating efficiency is higher.

[0066] In an optional embodiment of the present invention, such as Figure 5 As shown, step S3 specifically includes:

[0067] S31: Control the heating plate 3 to power on and operate according to the target heating power;

[0068] S32: The actual duration for which the heating plate 3 continuously operates based on the target heating power is statistically analyzed. When the actual duration reaches a predetermined duration threshold, a power change signal is output. The ratio of the predetermined duration threshold to the target heating duration is a first predetermined ratio.

[0069] S33: According to the power change signal, control the actual heating power of the heating plate to decrease from the target heating power to the predetermined heating power so that the actual heating temperature of the heating plate 3 reaches and is maintained at the preset target temperature, and the ratio of the predetermined heating power to the target heating power is a second predetermined ratio.

[0070] In this embodiment, the heating plate 3 is first powered on according to the target heating power, so that the heating temperature of the heating plate 3 continues to rise steadily. Since the heating plate 3 of the heat transfer machine is usually made of resistance wire and heating aluminum plate, it takes a certain amount of time for the resistance wire to conduct heat to the heat-conducting aluminum plate. Therefore, the heat of the resistance wire is usually slightly higher than the temperature of the heating aluminum plate. So when it is determined that the actual time of continuous power-on operation according to the target heating power reaches the predetermined time threshold, the actual heating power of the heating plate 3 is controlled to be reduced from the target heating power to the predetermined heating power, thereby improving the utilization rate of electrical energy and avoiding the temperature on the actual heating aluminum plate being higher than the preset target temperature due to the time difference of heat transfer.

[0071] In an optional embodiment of the present invention, the heating plate 3 is powered on and operated according to a pre-stored time-power curve calculated based on the target heating time, target heating power, a first predetermined ratio, and a second predetermined ratio. In this embodiment, by pre-calculating the time-power curve based on parameters such as the target heating time, the first predetermined ratio, and the second predetermined ratio, the heating plate 3 is directly controlled according to the time-power curve during the actual control process, making the control simpler and eliminating the need for frequent calculations.

[0072] In an optional embodiment of the present invention, the data table is calculated based on Joule's law and the specific heat capacity formula. In this embodiment, the heating power supply circuit of the heating plate 3 is usually regarded as a purely resistive circuit. In a purely resistive circuit, the target heating time and target heating power can be quickly and easily calculated based on the actual ambient temperature value and the preset target temperature using Joule's law and the specific heat capacity formula.

[0073] If the functions described in the embodiments of this invention are implemented as software functional modules or units and sold or used as independent products, they can be stored in a computing device-readable storage medium. Based on this understanding, the parts of the embodiments of this invention that contribute to the prior art or the technical solutions can be embodied in the form of software products. These software products are stored in a storage medium and include several instructions to cause a computing device (which may be a personal computer, server, mobile computing device, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably.

[0074] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

Claims

1. A heating control device for a heat transfer machine, characterized in that, The device includes: The temperature detection module is used to detect the ambient temperature around the heat transfer machine and output the actual ambient temperature value obtained from the detection. The data processing module, connected to the temperature detection module, has a built-in data table reflecting the actual ambient temperature value and the target heating time and target heating power. It is used to determine and output the target heating time and target heating power for raising the heating plate of the heat transfer machine to a preset target temperature based on the actual ambient temperature value and the data table; and The heating control module is connected to the data processing module and the heating plate respectively, and is used to control the heating plate to power on and operate according to the target heating time and target heating power so that the heating temperature of the heating plate reaches and is maintained at the preset target temperature; The heating control module includes: The first control unit is connected to the data processing module and the heating plate respectively, and is used to control the heating plate to power on and work according to the target heating power. A timing unit, connected to the first control unit, is used to count the actual duration for which the heating plate continuously operates under power according to the target heating power. When the actual duration reaches a predetermined duration threshold, a power change signal is output. The ratio of the predetermined duration threshold to the target heating duration is a first predetermined ratio. The second control unit is connected to the timing unit and the heating plate respectively, and is used to control the actual heating power of the heating plate to decrease from the target heating power to the predetermined heating power according to the power change signal so that the actual heating temperature of the heating plate reaches and is maintained at the preset target temperature. The ratio of the predetermined heating power to the target heating power is a second predetermined ratio.

2. The heating control device for the heat transfer machine as described in claim 1, characterized in that, The temperature control module also includes: The curve storage unit is connected to the first control unit and the second control unit respectively, and is used to pre-store the time-power curve calculated based on the target heating time, target heating power, first predetermined ratio and second predetermined ratio. The first control unit and the second control unit control the heating plate to power on and work according to the time-power curve.

3. The heating control device for the heat transfer machine as described in claim 1, characterized in that, The data table was calculated based on Joule's law and the specific heat capacity formula.

4. A heat transfer machine, comprising a heating plate and a heating control device connected to the heating plate, characterized in that, The heating control device is the heating control device as described in any one of claims 1-3.

5. A heating control method for a heat transfer machine, characterized in that, The method includes the following steps: Detects the ambient temperature around the heat transfer machine and outputs the actual ambient temperature value obtained from the detection. Based on the actual ambient temperature value and a data table reflecting the correspondence between the actual ambient temperature value and the target heating time and target heating power, the target heating time and target heating power for raising the heating plate of the heat transfer machine to the preset target temperature are determined and output; and The heating plate is controlled to power on and operate according to the target heating time and target heating power so that the heating temperature of the heating plate reaches and is maintained at the preset target temperature; Specifically, controlling the heating plate to power on according to the target heating time and target heating power, so that the heating temperature of the heating plate reaches and is maintained at the preset target temperature, includes: The heating plate is controlled to power on and operate according to the target heating power; The actual duration for which the heating plate continuously operates based on the target heating power is statistically analyzed. When the actual duration reaches a predetermined duration threshold, a power change signal is output. The ratio of the predetermined duration threshold to the target heating duration is a first predetermined ratio. The actual heating power of the heating plate is controlled to decrease from the target heating power to a predetermined heating power according to the power change signal, so that the actual heating temperature of the heating plate reaches and is maintained at the preset target temperature. The ratio of the predetermined heating power to the target heating power is a second predetermined ratio.

6. The heating control method for a heat transfer machine as described in claim 5, characterized in that, The heating plate is powered on and operated based on a pre-stored time-power curve calculated using the target heating duration, target heating power, first predetermined ratio, and second predetermined ratio.

7. The heating control method for a heat transfer machine as described in claim 5, characterized in that, The data table was calculated based on Joule's law and the specific heat capacity formula.

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