Dynamic temperature control device with heat recovery function
Patent Information
- Application Number
- CN202522475962.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-21
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-11-21
AI Technical Summary
急速冷却和加热过程消耗的大量能源（如电能、冷冻水或蒸汽）直接排放到环境中，无法循环利用；
本实用新型的具有热回收功能的动态温控设备，在温度切换时将模具的热量储存，并在下一阶段释放出来，实现快速升温，缩短周期；等压控制实现高低温的无相变切换，避免了系统由于媒体相变而产生的压力温度波动；热回收装置和温控设备可以集成一体，占用空间小；热回收量与动态负载匹配，避免造成能源浪费。
Smart Images
Figure CN224668186U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of temperature control technology, and particularly to the field of mold temperature controllers. Specifically, it refers to a dynamic temperature control device with heat recovery function and a dynamic temperature control device. Background Technology
[0002] Currently available mold temperature control or rapid temperature and cooling devices generally suffer from the following defects and problems: The large amounts of energy consumed in rapid cooling and heating processes (such as electricity, chilled water, or steam) are directly released into the environment and cannot be recycled; When switching between hot and cold, external energy is needed to replenish the cold / heat in real time. Delays in energy supply may cause a decrease in the temperature switching speed, affecting production efficiency. The lack of energy recovery leads to fluctuations in media temperature, affecting the quality of molded products. Utility Model Content
[0003] The main purpose of this utility model is to address the above-mentioned problems by providing a dynamic temperature control device with heat recovery function.
[0004] To achieve the above objectives, this utility model provides a dynamic temperature control device with heat recovery function. Its main features include a control unit, a high-temperature unit, a low-temperature unit, and a switching unit. The high-temperature unit has a high-temperature heating cylinder, a high-temperature medium outlet, and a high-temperature medium circuit. The low-temperature unit has a low-temperature heating cylinder, a low-temperature medium outlet, and a low-temperature medium circuit. Both the high-temperature heating cylinder and the low-temperature heating cylinder are connected to the cold water inlet through a cooling water inlet pipe. Both the high-temperature heating cylinder and the low-temperature heating cylinder are connected to the cold water outlet through a cooling water outlet pipe. A heat recovery tank is installed on the cooling water inlet pipe of the high-temperature heating cylinder, and a temperature sensor is installed on the heat recovery tank. The dynamic temperature control device has a high-temperature media recovery mode. In the high-temperature media recovery mode, the switching unit controls the low-temperature media circuit and the high-temperature media outlet to close and the low-temperature media outlet and the high-temperature media circuit to open, so that the high-temperature media is recovered to the heat recovery tank through the low-temperature media. The control unit is configured to control the termination of the high-temperature media recovery mode based on the first temperature of the heat recovery tank detected by the temperature sensor.
[0005] Preferably, the switching unit has a high-temperature media outlet control line, a high-temperature media return control line, a low-temperature media outlet control line, and a low-temperature media return control line. A high-temperature media bypass line is provided between the high-temperature media outlet control line and the high-temperature media return control line, and a low-temperature media bypass line is provided between the low-temperature media outlet control line and the low-temperature media return control line. The high-temperature medium outlet control pipeline is connected to the high-temperature medium outlet, the high-temperature medium return control pipeline is connected to the high-temperature medium circuit, the low-temperature medium outlet control pipeline is connected to the low-temperature medium outlet, and the low-temperature medium return control pipeline is connected to the low-temperature medium circuit. A switching control valve is installed on each of the high-temperature media outlet control line, high-temperature media return control line, high-temperature media bypass line, low-temperature media outlet control line, low-temperature media return control line, and low-temperature media bypass line; In the high-temperature media recovery mode, the switching control valves on the high-temperature media outlet control line, the high-temperature media bypass line, the low-temperature media return control line, and the low-temperature media bypass line are all closed, while the switching control valves on the high-temperature media return control line and the low-temperature media outlet control line are all open.
[0006] Preferably, a booster pump, a check valve, and a booster pump bypass pipeline are provided between the heat recovery tank and the cooling water inlet, and between the low-temperature heating cylinder and the cooling water inlet.
[0007] Preferably, the booster pump is connected to the cooling water outlet via a safety valve.
[0008] Preferably, the low-temperature heating cylinder is connected to the heat recovery tank via a low-temperature media recovery pipeline; The dynamic temperature control device has a low-temperature media recovery mode. In the low-temperature media recovery mode, the switching unit controls the low-temperature media outlet and the high-temperature media circuit to close and the low-temperature media circuit and the high-temperature media outlet to open, so that the low-temperature media is recovered to the heat recovery tank through the high-temperature media. The control unit is configured to control the termination of the cryogenic media recovery mode based on the second temperature of the heat recovery tank detected by the temperature sensor.
[0009] Compared with the prior art, the present invention has the following beneficial technical effects: This utility model's dynamic temperature control device with heat recovery function stores the heat of the mold during temperature switching and releases it in the next stage, achieving rapid heating and shortening the cycle; isobaric control enables phase-change switching between high and low temperatures, avoiding pressure and temperature fluctuations caused by medium phase change; the heat recovery device and temperature control device can be integrated into one unit, occupying little space; the heat recovery amount is matched with the dynamic load, avoiding energy waste. Attached Figure Description
[0010] Figure 1 This is a schematic diagram illustrating the principle of the dynamic temperature control device with heat recovery function of this utility model. Detailed Implementation
[0011] To provide a clearer understanding of the technical content of this utility model, the following embodiments are provided in detail. However, it is important to note that these descriptions are merely for further illustrating the features and advantages of this utility model, and not for limiting the scope of the utility model claims.
[0012] like Figure 1 The image shows an embodiment of the dynamic temperature control device with heat recovery function provided by this utility model. The dynamic temperature control device includes a control unit, a high-temperature unit, a low-temperature unit, and a switching unit.
[0013] The high-temperature unit is used to provide the mold with a set high-temperature temperature T1. The high-temperature unit has a high-temperature heating cylinder 6, a high-temperature medium outlet 18, and a high-temperature medium circuit 17.
[0014] The cryogenic unit is used to provide a set cryogenic temperature T2 to the mold, where T2 < T1. This cryogenic unit includes a cryogenic heating cylinder 4, a cryogenic medium outlet 20, and a cryogenic medium circuit 19. The connection relationship and working principle of the heating cylinder, media outlet and media circuit in the high temperature unit and low temperature unit are roughly the same as those of the media circulation pipeline of a conventional temperature measuring machine.
[0015] The principle of media circulation will be briefly explained using the high-temperature unit as an example: A high-temperature media pump 5 is installed in the high-temperature media outlet 18, and a heating element is installed in the high-temperature heating cylinder 6. The high-temperature media with a set high temperature T1 is delivered to the mold inlet by the high-temperature media pump 5. After heating the mold, it flows through the mold outlet to the high-temperature media circuit 17 and finally enters the high-temperature heating cylinder 6 for media circulation heating.
[0016] Both the high-temperature heating cylinder 6 and the low-temperature heating cylinder 4 are connected to the cold water inlet via cooling water inlet pipes, and both are connected to the cold water outlet via cooling water outlet pipes, allowing for the replenishment of water to each heating cylinder or the discharge of circulating water as needed. A normally closed solenoid valve and a normally open control valve are installed in the cooling water outlet pipe. During the circulating heating process, the normally closed solenoid valve opens intermittently to release air and pressure.
[0017] In this invention, a heat recovery tank 11 is installed on the cooling water inlet pipe of the high-temperature heating cylinder 6. The heat recovery tank 11 is equipped with a temperature sensor 12 to detect the temperature inside the heat recovery pipe. A booster pump 9, a check valve 8, and a booster pump bypass pipe are installed between the heat recovery tank 11 and the cooling water inlet, and between the low-temperature heating cylinder 4 and the cooling water inlet. The booster pump 9 is also connected to the cooling water outlet via a safety valve 7. The booster pump controls the system pressure to prevent the media water from vaporizing under high-temperature conditions. The booster pump bypass pipe regulates the total flow rate of cooling water when replenishing each unit, and the check valve prevents backflow of high-temperature water vapor within the system. A pressure switch is also installed on the cooling water inlet pipe to determine whether the external cooling water supply is normal by detecting the cooling water inlet pressure; if the pressure is lower than the set value, an alarm will be triggered.
[0018] The dynamic temperature control device features a high-temperature media recovery mode. In this mode, the switching unit controls the low-temperature media circuit 19 and the high-temperature media outlet 18 to close, while the low-temperature media outlet 20 and the high-temperature media circuit 17 are opened, recovering the high-temperature media to the heat recovery tank 11 via the low-temperature media. Furthermore, the control unit is configured to terminate the high-temperature media recovery mode based on the first temperature detected by the temperature sensor 12 in the heat recovery tank 11. The heat recovery tank stores the hot water from the previous cycle and provides it to the next cycle, reducing the heating time in the next cycle.
[0019] like Figure 1 As shown, the switching unit has a high-temperature media outlet control line 13, a high-temperature media return control line 2, a low-temperature media outlet control line 16, and a low-temperature media return control line 14. A high-temperature media bypass line 1 is provided between the high-temperature media outlet control line 13 and the high-temperature media return control line 2, and a low-temperature media bypass line 15 is provided between the low-temperature media outlet control line 16 and the low-temperature media return control line 14. The high-temperature medium outlet control line 13 is connected to the high-temperature medium outlet 18, the high-temperature medium return control line 2 is connected to the high-temperature medium circuit 17, the low-temperature medium outlet control line 16 is connected to the low-temperature medium outlet 20, and the low-temperature medium return control line 14 is connected to the low-temperature medium circuit 19. A switching control valve is installed on each of the high-temperature media outlet control line 13, the high-temperature media return control line 2, the high-temperature media bypass line 1, the low-temperature media outlet control line 16, the low-temperature media return control line 14, and the low-temperature media bypass line 15.
[0020] Based on the above structure, the dynamic temperature control method of this utility model includes controlling the dynamic temperature control device to switch between a high temperature control mode and a low temperature control mode, and switching to a high temperature media recovery mode before switching from the high temperature control mode to the low temperature control mode.
[0021] In the high-temperature media recovery mode, the control unit controls the switching control valves on the high-temperature media outlet control line 13, the high-temperature media bypass line 1, the low-temperature media return control line 14, and the low-temperature media bypass line 15 to be closed, while the switching control valves on the high-temperature media return control line 2 and the low-temperature media outlet control line 16 are opened.
[0022] In the high-temperature control mode, the control unit controls the switching control valves on the high-temperature media bypass line 1, the low-temperature media return control line 14, and the low-temperature media outlet control line 16 to be closed, while the switching control valves on the high-temperature media outlet control line 13, the high-temperature media return control line 2, and the low-temperature media bypass line 15 are all opened.
[0023] In the aforementioned low-temperature control mode, the switching control valves on the low-temperature media bypass line 15, the high-temperature media return control line 2, and the high-temperature media outlet control line 13 are all closed, while the switching control valves on the low-temperature media outlet control line 16, the low-temperature media return control line 14, and the high-temperature media bypass line 1 are all open.
[0024] Furthermore, in this invention, the low-temperature heating cylinder 4 is connected to the heat recovery tank 11 via the low-temperature media recovery pipeline 10. Based on this structure, the dynamic temperature control method of this invention further includes switching to the low-temperature media recovery mode before switching from the low-temperature control mode to the high-temperature control mode.
[0025] A regulating valve can be installed on the cryogenic media recovery pipeline 10 to adjust the flow rate of the heat recovery media by adjusting the valve opening.
[0026] In the low-temperature media recovery mode, the switching unit controls the low-temperature media outlet 20 and the high-temperature media circuit 17 to close, and the low-temperature media circuit 19 and the high-temperature media outlet 18 to open, so that the low-temperature media is recovered to the heat recovery tank 11 through the high-temperature media. The control unit is configured to control the termination of the low-temperature media recovery mode based on the second temperature of the heat recovery tank 11 detected by the temperature sensor 12.
[0027] The dynamic temperature control method of this utility model further includes, before switching from high temperature control mode to low temperature control mode, switching to high temperature medium self-circulation mode and then switching to high temperature medium recovery mode; and before switching from low temperature control mode to high temperature control mode, switching to low temperature medium self-circulation mode and then switching to low temperature medium recovery mode.
[0028] In the high-temperature media self-circulation mode, the switching unit controls the passage between the high-temperature unit and the mold to close and performs high-temperature unit self-circulation insulation, that is, the high-temperature media bypass pipe in the switching unit is opened to perform self-circulation. In the aforementioned low-temperature media self-circulation mode, the switching unit controls the passage between the low-temperature unit and the mold to close and performs low-temperature unit self-circulation insulation, that is, the low-temperature media bypass pipe in the switching unit is opened to perform self-circulation.
[0029] Taking mold temperature control in injection molding as an example, this invention will explain the process cycle of one step.
[0030] (1) High temperature control mode of mold The initial setting of the high-temperature unit is T1. The switching control valves on the high-temperature medium outlet control line 13 and the high-temperature medium return control line 2 in the switching unit are opened, and the switching control valve on the high-temperature medium bypass line 1 is closed, so as to open the passage between the high-temperature unit and the mold.
[0031] At this time, the initial set medium temperature of the low temperature unit is T2. The switching control valves on the low temperature medium return control line 14 and the low temperature medium output control line 16 in the switching unit are closed, and the switching control valve on the low temperature medium bypass line 15 is opened. The passage between the low temperature unit and the mold is closed, and self-circulation is carried out through the bypass line.
[0032] In the high-temperature control mode of the mold, the media pump of the high-temperature unit operates to supply water into the mold, and the high-temperature heating cylinder works to heat the media water in the high-temperature unit to the set temperature T1. During the circulating heating process, the normally closed solenoid valve opens intermittently to vent and depressurize, and the booster pump controls the system pressure to prevent the media water from vaporizing under high-temperature conditions. Once the actual temperature of the media water rises to T1, it proceeds to the next process.
[0033] (2) High-temperature media self-circulation mode The switching control valves on the high-temperature medium outlet control line 13 and the high-temperature medium return control line 2 of the switching unit are closed, the switching control valve on the high-temperature medium bypass line 1 is opened, the passage between the high-temperature unit and the mold is closed, the high-temperature unit itself does not change its operating state, and the high-temperature unit enters the self-circulation heat preservation state.
[0034] (3) High-temperature media recovery mode In the switching unit, the switching control valves on the high-temperature media outlet control line 13 and the high-temperature media bypass line 1 are closed, while the switching control valve on the high-temperature media return control line 2 is open; the switching control valves on the low-temperature media return control line 14 and the low-temperature media bypass line 15 are closed, while the switching control valve on the low-temperature media outlet control line 16 is open.
[0035] The low-temperature medium water from the low-temperature unit is transported to the mold through the low-temperature unit medium pump 3 and the passage of the switching unit. In this way, the high-temperature water remaining in the mold from the previous process is squeezed out by the low-temperature water, passes through the high-temperature medium return pipeline and the high-temperature heating cylinder, and is finally stored in the heat recovery tank.
[0036] The high-temperature recovery temperature is set to T3. When the temperature probe detects that the actual temperature inside the heat recovery tank reaches T3, the high-temperature medium heat recovery ends and the process moves to the next step.
[0037] (4) Mold cooling control mode After the high-temperature medium is recovered, the switching control valves on the high-temperature medium return control line 2 and the high-temperature medium outlet control line 13 are closed, and the switching control valve on the high-temperature medium bypass line 1 is opened, and the high-temperature unit enters the high-temperature medium self-circulation state.
[0038] The switching control valves on the low-temperature media outlet control line 16 and the low-temperature media return control line 14 are opened, and the switching control valve on the low-temperature media bypass line 15 is closed. The low-temperature media pump supplies low-temperature media water to the mold through the passage of the switching unit. The low-temperature heating cylinder works to heat the low-temperature media to the set temperature T2. When the actual temperature of the media water reaches T2, it enters the next process.
[0039] (5) Low-temperature media self-circulation mode The switching control valves on the low-temperature medium outlet control line 16 and the low-temperature medium return control line 14 are closed, the switching control valve on the low-temperature medium bypass line 15 is opened, the passage between the low-temperature unit and the mold is closed, the low-temperature unit itself remains unchanged, and the low-temperature unit enters a self-circulating heat preservation state.
[0040] (6) Low-temperature media recovery mode In the switching unit, the switching control valves on the high-temperature media return control line 2 and the high-temperature media bypass line 1 are closed, while the switching control valve on the high-temperature media outlet control line 13 is open; the switching control valves on the low-temperature media outlet control line 16 and the low-temperature media bypass line 15 are closed, while the switching control valve on the low-temperature media return control line 14 is open.
[0041] High-temperature medium water is transported to the mold through the high-temperature medium pump and the switching unit. In this way, the low-temperature water remaining in the mold from the previous process is squeezed out by the high-temperature water, passes through the low-temperature medium return pipeline and the low-temperature heating cylinder, and is finally stored in the heat recovery tank 11.
[0042] The temperature for cryogenic recovery is set to T4. When the temperature probe 12 detects that the actual temperature inside the heat recovery tank has reached T4, the cryogenic medium heat recovery ends, and one cycle is completed.
[0043] Therefore, this invention achieves isobaric control to realize phase-change-free switching between high and low temperatures, avoiding pressure and temperature fluctuations caused by media phase change, and preventing the phenomenon of water phase change and vaporization even during large temperature switching.
[0044] This invention also achieves matching of heat recovery capacity with dynamic load, avoiding energy waste; it determines whether heat recovery is complete by monitoring the water temperature inside the heat recovery tank. In the initial stage of heat recovery, the water temperature inside the tank tends to rise. If heat recovery continues until it is nearly complete, then only low-temperature media is being recovered, and the temperature inside the heat recovery tank will drop. Conversely, during low-temperature water recovery, the temperature inside the tank first decreases and then rises. The temperature reference value inside the heat recovery tank can be set to the actual operating temperature of the high-temperature and low-temperature units. Considering the valve switching time, a correction value ΔT can be added to close the valve a little before reaching the target temperature, ensuring that as much of the media water as possible is recovered.
[0045] Compared with the prior art, the present invention has the following beneficial technical effects: This utility model's dynamic temperature control device with heat recovery function stores the heat of the mold during temperature switching and releases it in the next stage, achieving rapid heating and shortening the cycle; isobaric control enables phase-change switching between high and low temperatures, avoiding pressure and temperature fluctuations caused by medium phase change; the heat recovery device and temperature control device can be integrated into one unit, occupying little space; the heat recovery amount is matched with the dynamic load, avoiding energy waste.
[0046] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, this specification should be considered illustrative rather than restrictive.
Claims
1. A dynamic temperature control device with heat recovery function, characterized in that, It includes a control unit, a high-temperature unit, a low-temperature unit, and a switching unit. The high-temperature unit has a high-temperature heating cylinder, a high-temperature medium outlet, and a high-temperature medium circuit. The low-temperature unit has a low-temperature heating cylinder, a low-temperature medium outlet, and a low-temperature medium circuit. Both the high-temperature heating cylinder and the low-temperature heating cylinder are connected to the cold water inlet through a cooling water inlet pipe. Both the high-temperature heating cylinder and the low-temperature heating cylinder are connected to the cold water outlet through a cooling water outlet pipe. A heat recovery tank is installed on the cooling water inlet pipe of the high-temperature heating cylinder, and a temperature sensor is installed on the heat recovery tank. The dynamic temperature control device has a high-temperature media recovery mode. In the high-temperature media recovery mode, the switching unit controls the low-temperature media circuit and the high-temperature media outlet to close and the low-temperature media outlet and the high-temperature media circuit to open, so that the high-temperature media is recovered to the heat recovery tank through the low-temperature media. The control unit is configured to control the termination of the high-temperature media recovery mode based on the first temperature of the heat recovery tank detected by the temperature sensor.
2. The dynamic temperature control device with heat recovery function according to claim 1, characterized in that, The switching unit has a high-temperature media outlet control line, a high-temperature media return control line, a low-temperature media outlet control line, and a low-temperature media return control line. A high-temperature media bypass line is provided between the high-temperature media outlet control line and the high-temperature media return control line, and a low-temperature media bypass line is provided between the low-temperature media outlet control line and the low-temperature media return control line. The high-temperature medium outlet control pipeline is connected to the high-temperature medium outlet, the high-temperature medium return control pipeline is connected to the high-temperature medium circuit, the low-temperature medium outlet control pipeline is connected to the low-temperature medium outlet, and the low-temperature medium return control pipeline is connected to the low-temperature medium circuit. A switching control valve is installed on each of the high-temperature media outlet control line, high-temperature media return control line, high-temperature media bypass line, low-temperature media outlet control line, low-temperature media return control line, and low-temperature media bypass line; In the high-temperature media recovery mode, the switching control valves on the high-temperature media outlet control line, the high-temperature media bypass line, the low-temperature media return control line, and the low-temperature media bypass line are all closed, while the switching control valves on the high-temperature media return control line and the low-temperature media outlet control line are all open.
3. The dynamic temperature control device with heat recovery function according to claim 1, characterized in that, A booster pump, a check valve, and a booster pump bypass pipeline are installed between the heat recovery tank and the cooling water inlet, and between the low-temperature heating cylinder and the cooling water inlet.
4. The dynamic temperature control device with heat recovery function according to claim 3, characterized in that, The booster pump is connected to the cooling water outlet via a safety valve.
5. The dynamic temperature control device with heat recovery function according to claim 1, characterized in that, The low-temperature heating cylinder is connected to the heat recovery tank via a low-temperature media recovery pipeline; The dynamic temperature control device has a low-temperature media recovery mode. In the low-temperature media recovery mode, the switching unit controls the low-temperature media outlet and the high-temperature media circuit to close and the low-temperature media circuit and the high-temperature media outlet to open, so that the low-temperature media is recovered to the heat recovery tank through the high-temperature media. The control unit is configured to control the termination of the cryogenic media recovery mode based on the second temperature of the heat recovery tank detected by the temperature sensor.