Heater assembly

Abstract

The utility model discloses a heater assembly which comprises a first heater, a connecting pipe, a flow sensor, a water outlet pipe, a controller, a control circuit, a main flow pipeline, a detection pipeline and at least one second heater. The heating power of the first heater is adjustable, and the heating power of the second heater is constant; the first heater and the second heaters are connected in series through connecting pipes; the water outlet pipe is communicated with the main flow pipeline and the detection pipeline, and the main flow pipeline and the detection pipeline are connected in parallel; the control circuit is electrically connected with the first heater and the second heaters; the flow sensor is arranged on the detection pipeline and is used for detecting the flow of fluid in the detection pipeline; the controller is connected with the flow sensor and the control circuit and used for receiving the flow, detected by the flow sensor, of the fluid, and if the flow of the fluid is smaller than a preset flow threshold value, a power-off instruction is sent to the control circuit. Safety and stability are guaranteed, the heating power of the heater is accurately controlled, and the refrigeration effect of the water chiller is accurately evaluated.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric heater technical field, especially a kind of heater assembly. BACKGROUND

[0002] Currently, in the verification of the refrigeration capacity of industrial water chiller, a set of heater device is generally needed to simulate the actual heat generation, and the refrigeration capacity of industrial water chiller is calculated according to the temperature difference and flow rate of the circulating liquid inlet and outlet of the industrial water chiller. Due to the high temperature, high pressure and other dangerous factors, the safety of the heater device is crucial. SUMMARY

[0003] In order to ensure the safety and stability of the entire heater assembly and achieve precise control of the heating power of the heater, the utility model provides a kind of heater assembly to accurately evaluate the refrigeration effect of the water chiller.

[0004] The utility model embodiment provides a kind of heater assembly, it include: first heater, connecting pipe, flow sensor, outlet pipe, controller, control circuit, main flow pipeline, detection pipeline and at least one second heater;

[0005] The heating power of the first heater is adjustable, and the heating power of the second heater is constant;

[0006] The first heater and each second heater are connected in series by the connecting pipe, wherein the last second heater is connected to the outlet pipe in communication;

[0007] The outlet pipe is in communication with the main flow pipeline and the detection pipeline, and the main flow pipeline and the detection pipeline are in parallel;

[0008] The control circuit is electrically connected to the first heater and each second heater;

[0009] The flow sensor is arranged in the detection pipeline for detecting the flow rate of the fluid in the detection pipeline;

[0010] The controller is connected to the flow sensor and the control circuit, and is configured to receive the flow rate of the fluid detected by the flow sensor, and send a power-off instruction to the control circuit if the flow rate of the fluid is less than a preset flow threshold.

[0011] Optionally, the heater assembly further comprises a temperature fuse;

[0012] The first heater and each second heater are provided with the temperature fuse;

[0013] One end of the temperature fuse is electrically connected with the control circuit, and the other end of the temperature fuse extends into the corresponding first heater and second heater.

[0014] Optionally, the heater assembly further comprises a temperature sensor.

[0015] The detection pipeline and each of the connection pipelines are provided with the temperature sensor.

[0016] The temperature sensor is used for detecting the temperature of the fluid in the corresponding connection pipeline and the detection pipeline.

[0017] The controller is connected with the temperature sensor, and is used for receiving the temperature of the fluid detected by the temperature sensor, and sending a power-off instruction to the control circuit if the temperature of the fluid reaches a preset temperature threshold.

[0018] Optionally, the heater assembly further comprises a pressure sensor arranged in the detection pipeline.

[0019] The pressure sensor is used for detecting the pressure of the fluid in the detection pipeline.

[0020] The controller is connected with the pressure sensor, and is used for receiving the pressure of the fluid detected by the pressure sensor, and sending a power-off instruction to the control circuit if the pressure of the fluid reaches a first preset pressure threshold.

[0021] Optionally, the heater assembly further comprises a warning device.

[0022] The controller is connected with the warning device, and is used for sending an opening instruction to the warning device when the flow rate of the fluid detected by the flow sensor is less than a preset flow rate threshold.

[0023] Optionally, the heater assembly further comprises a safety valve.

[0024] The safety valve is arranged in the water outlet pipeline, and is used for being automatically opened and releasing pressure if the pressure in the water outlet pipeline reaches a second preset pressure threshold.

[0025] Optionally, the heater assembly further comprises an automatic exhaust valve.

[0026] The water outlet pipeline and each of the connection pipelines are provided with the automatic exhaust valve.

[0027] Optionally, the heater assembly further comprises a storage rack.

[0028] The storage rack is connected with the first heater, the main pipeline and each of the second heaters.

[0029] Optionally, the bottom end of the storage rack is provided with a walking wheel.

[0030] Optionally, the first heater comprises a heater body and a power controller.

[0031] The power controller is connected with the heater body, and is configured to control the heating power of the heater body.

[0032] The beneficial effects of the above technical solutions provided in the embodiments of the present application at least include:

[0033] The embodiment of the present application provides a kind of heater assembly, by being arranged on the flow sensor of detection pipeline, to detect the flow of fluid in detection pipeline, and controller is connected with flow sensor and control circuit, controller can receive the flow of fluid detected by flow sensor, when the flow of fluid is less than preset flow threshold, controller sends power-off instruction to control circuit, control circuit will disconnect with first heater and each second heater Electric connection, first heater and each second heater stop working, to prevent overheating and potential damage caused by insufficient flow. Through the real-time monitoring and power-off protection mechanism of flow sensor and controller, first heater and each second heater can be closed in time when abnormal situation occurs, without manual intervention, can be in time and effectively avoid that heater assembly overheats or is damaged due to insufficient fluid flow, significantly improve the safety and reliability of heater assembly.

[0034] By adopting the mode that first heater and each second heater are connected in series, and the heating power of first heater is accurately controlled, not only can extensive heating power adjustment be realized, but also higher control precision can be maintained, the output of first heater can be more accurately controlled, so that the required temperature condition can be more accurately simulated or maintained, ensure the performance of entire heater assembly, guarantee the accuracy of evaluation of refrigeration effect of water chiller.

[0035] Other features and advantages of the present application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned from practice of the application. The objects and other advantages of the present application can be realized and attained by means of the instrumentalities particularly pointed out in the written description and claims hereof.

[0036] The technical solutions of the present application will be further described in detail below with the help of drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0038] Figure 1 It is a structural schematic view of the heater assembly provided in the embodiments of the present application.

[0039] BRIEF DESCRIPTION OF DRAWINGS

[0040] 1, first heater;2, connecting pipe;3, flow sensor;4, water outlet pipe;5, main flow pipe;6, detection pipe;7, second heater;8, temperature fuse;9, temperature sensor;10, pressure sensor;11, safety valve;12, automatic exhaust valve;13, shelf;14, walking wheel. DETAILED DESCRIPTION

[0041] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0042] In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "far", "near", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In the prior art, the heater assembly usually adopts a simple safety protection system. In the case of remote operation, the operator cannot directly see the abnormal situation of the system at the first time, so the abnormal situation cannot be handled in time, which may cause accidents. At the same time, when the abnormal situation occurs, the heating power of the heater will be affected, and the precision and stability of the heating power of the heater will affect the accuracy of the experimental results, which will cause the experimental data to deviate and the precision to be poor.

[0045] In order to solve the above problems, the inventors have developed a heater assembly with a safe protection system, which can ensure the safety and stability of the entire heater assembly and accurately control the heating power of the heater, thereby accurately evaluating the refrigeration effect of the water chiller.

[0046] Embodiments

[0047] Reference Figure 1 The present embodiment provides a heater assembly which can be connected with the inlet and outlet of a water chiller. The liquid (i.e. circulating liquid, usually cooling water) of the water chiller flows out from the outlet and enters the heater assembly, is heated after passing through the heater assembly, and then flows back to the inlet of the water chiller for cooling. By measuring the temperature difference before and after the liquid is heated and the flow rate of the liquid, etc., the refrigeration capacity of the water chiller can be calculated to accurately evaluate the refrigeration effect of the water chiller.

[0048] The heater assembly comprises a first heater 1, a connecting pipe 2, a flow sensor 3, an outlet pipe 4, a controller (not shown in the figure), a control circuit (not shown in the figure), a main flow pipe 5, a detection pipe 6, and at least one second heater 7. The heating power of the first heater 1 is adjustable, and the heating power of the second heater 7 is a constant value. During the operation of the heater assembly, the second heater 7 is always in full-power constant output. The first heater 1 and each second heater 7 are connected in series through the connecting pipe 2, wherein the last second heater 7 is connected with the outlet pipe 4 in communication to guide the heated fluid out of the outlet pipe 4. The inlet of the first heater 1 can be in communication with the outlet of the water chiller. The control circuit is electrically connected with the first heater 1 and each second heater 7 to supply power to the first heater 1 and each second heater 7.

[0049] The outlet pipe 4 is in communication with the main flow pipe 5 and the detection pipe 6, and the main flow pipe 5 and the detection pipe 6 are in parallel. The outlets of the main flow pipe 5 and the detection pipe 6 can be in communication with the inlet of the water chiller. The main flow pipe 5 functions to ensure the flow capacity to meet the maximum flow capacity of the entire heater assembly. In order to meet this requirement, the size of the main flow pipe 5 can be designed to be larger than that of the detection pipe 6 to ensure that sufficient liquid flow can pass smoothly. The flow sensor 3 is arranged in the detection pipe 6 to detect the flow rate of the fluid in the detection pipe 6. The controller is connected with the flow sensor 3 and the control circuit to receive the flow rate of the fluid detected by the flow sensor 3. If the flow rate of the fluid is less than a preset flow threshold, the controller sends a power-off instruction to the control circuit to prevent abnormal temperature rise.

[0050] In use, the fluid (i.e. the circulating liquid) of the chiller flows out from the water outlet, enters the water inlet of the first heater 1, and is heated by the first heater 1 and the second heaters 7 in turn, and then flows into the main flow pipeline 5 and the detection pipeline 6 through the outlet pipes 4 respectively. The flow sensor 3 arranged at the detection pipeline 6 monitors the flow of the fluid in the detection pipeline 6 in real time and sends the data to the controller. The controller compares the received data with the preset flow threshold value. If the flow of the fluid is less than the preset flow threshold value, it indicates that the fluid flow is not smooth or there is a problem with the entire heater assembly. In this case, the controller sends a power-off instruction to the control circuit, which disconnects the electrical connection of the first heater 1 and the second heaters 7, and the first heater 1 and the second heaters 7 stop working to prevent overheating and potential damage caused by insufficient flow.

[0051] In this embodiment, since the main purpose of the detection pipeline 6 is detection, not as the main fluid transmission channel. Therefore, under the premise of not affecting the detection accuracy, reducing the pipeline size can significantly reduce the material cost and installation cost. At the same time, the pipeline size of the detection pipeline 6 is relatively small, and a small range flow sensor 3 can be configured to detect the flow, which can effectively save costs. Through the real-time monitoring of the flow sensor 3 and the controller and the power-off protection mechanism, the first heater 1 and the second heaters 7 can be turned off in time when an abnormal situation occurs without manual intervention, which can effectively avoid overheating or damage of the heater assembly caused by insufficient fluid flow, and significantly improve the safety and reliability of the heater assembly.

[0052] In this embodiment, the first heater 1 and the second heaters 7 are connected in series, the heating power of the first heater 1 can be finely adjusted, and the existing power controller can be used to control the heating power, and the second heaters 7 have constant full-power output. A first heater 1 with a maximum heating power of 6kW and two second heaters 7 with a constant heating power of 5kW can be set up, and through the linkage control of the three heaters, stepless adjustment can be realized in the range of 0kW-16kW. The configuration of the first heater 1 and the second heaters 7 in series and the accurate control of the output of the first heater 1 not only can realize wide heating power adjustment, but also can maintain high control accuracy, more accurately control the output of the first heater 1, and achieve the purpose of regulating the heating power of the entire heater, so as to more accurately simulate or maintain the required temperature conditions and ensure the performance of the entire heater assembly and the accuracy of the evaluation of the refrigeration effect of the chiller.

[0053] In a specific embodiment, refer to Figure 1The heater assembly further comprises temperature sensors 9. The detection pipe 6 and each connecting pipe 2 are provided with temperature sensors 9, which are used to detect the temperature of the fluid in the corresponding connecting pipe 2 and the detection pipe 6, and transmit the data to the controller in real time. The controller is connected with the temperature sensors 9, and is used to receive the temperature of the fluid detected by the temperature sensors 9, compare the data with a preset temperature threshold, and if the temperature of the fluid reaches the preset temperature threshold, it means that the heater assembly may be in an overheating state, which may cause a safety hazard, and then send a power-off instruction to the control circuit, the control circuit disconnects the electrical connection with the first heater 1 and each second heater 7, the first heater 1 and each second heater 7 stop working, preventing the first heater 1 and each second heater 7 from continuing to heat and possibly causing equipment damage or safety accidents, and ensuring the safety and reliability of the entire heater assembly.

[0054] In one specific embodiment, referring to Figure 1 The heater assembly further comprises a pressure sensor 10 arranged in the detection pipe 6, which is used to detect the pressure of the fluid in the detection pipe 6. The controller is connected with the pressure sensor 10, and is used to receive the fluid pressure detected by the pressure sensor 10, and compare the fluid pressure with a first preset pressure threshold, and if the fluid pressure reaches the first preset pressure threshold, it means that the heater assembly may be in an abnormal state, such as pipe blockage, fluid leakage or excessive internal pressure of the heater assembly, and the controller sends a power-off instruction to the control circuit, the control circuit disconnects the electrical connection with the first heater 1 and each second heater 7, the first heater 1 and each second heater 7 stop working, avoid high pressure, prevent equipment damage or safety accidents caused by the above abnormal situations, and ensure the safety and stability of the entire heater assembly.

[0055] In one specific embodiment, referring to Figure 1 The heater assembly further comprises an alarm (not shown in the figure) to increase the monitoring and alarm capability of the entire heater assembly. The controller is connected with the alarm, and the controller can receive the flow of the fluid detected by the flow sensor 3, and compare the flow of the fluid with a preset flow threshold, and when the flow of the fluid is less than the preset flow threshold, the controller sends an opening instruction to the alarm, the alarm receives the opening instruction and starts, so as to timely remind the operator, facilitate the operator to respond in time, avoid accidents, and significantly improve the safety and reliability of the heater assembly.

[0056] In one specific embodiment, referring to Figure 1The heater assembly further comprises a temperature fuse 8. The first heater 1 and each second heater 7 are provided with a temperature fuse 8, one end of the temperature fuse 8 is electrically connected to the control circuit, and the other end of the temperature fuse 8 extends into the corresponding first heater 1 and second heater 7 and is in direct contact with the liquid to sense the temperature of the liquid. When the liquid reaches a preset temperature threshold, the temperature fuse 8 will timely melt and cut off the power supply to the first heater 1 and the second heater 7, preventing the spread of faults or causing greater safety accidents. Here, the temperature fuse 8 can be a armored temperature fuse, which can sequentially include a protective tube, an insulation layer, and a temperature fuse. These parts are usually integrally stretched or manufactured through a special process. The armored temperature fuse adopts a special armored structure to wrap the temperature fuse in a solid protective tube, which can directly contact with the fluid and can sense the most real fluid temperature, thereby improving the safety of the system.

[0057] The temperature fuse 8 is an easily replaceable element. Once melted, it only needs to be replaced with a new fuse to restore the normal work of the heater, without the need to overhaul or replace the entire heater assembly, which is easy to maintain. By introducing the temperature fuse 8 into the heater assembly, not only the maintenance cost is reduced, but also the safety and reliability of the heater assembly are improved. Even if other protection mechanisms (such as the temperature sensor 9, the pressure sensor 10, and the flow sensor 3 mentioned above) fail, the temperature fuse 8 can still provide an additional safety guarantee.

[0058] In a specific embodiment, referring to Figure 1 The heater assembly further comprises a safety valve 11 provided in the water outlet pipe 4 for automatically opening and releasing pressure when the pressure in the water outlet pipe 4 reaches a second preset pressure threshold, thereby protecting the safety of the equipment and pipeline, and significantly improving the stability of the heater assembly. A detection sensor (not shown in the figure) can be arranged near the safety valve 11. The safety valve 11 is combined with the detection sensor. The detection sensor detects the water vapor discharged by the safety valve in the first time and transmits a signal to a remote controller. Even if other protection mechanisms (such as the temperature sensor 9, the pressure sensor 10, and the flow sensor 3 mentioned above) fail, the safety valve 11 can still maintain stability by releasing pressure to avoid the spread of faults or cause greater safety accidents, thereby greatly increasing the safety of the heater assembly.

[0059] In a specific embodiment, referring to Figure 1The heater assembly further comprises automatic exhaust valves 12, and the water outlet pipe 4 and each connecting pipe 2 is provided with an automatic exhaust valve 12. The automatic exhaust valve 12 is mainly used to remove air or other non-condensable gases in the heater assembly. After the heater assembly is restarted after maintenance, air may be mixed in the heater assembly. If the air is not removed in time, it will cause the heating efficiency to decrease, the noise to increase, the system to be unstable and even damaged, thereby reducing the accuracy of the evaluation result of the refrigeration effect of the water chiller. The automatic exhaust valve 12 can automatically open when the gas accumulates to a certain amount, release the gas, and automatically close after the gas is discharged, so as to maintain the optimal working state of the heater, improve the heating efficiency, and reduce the energy consumption.

[0060] In one specific embodiment, referring to Figure 1 The heater assembly further comprises a rack 13 connected with the first heater 1, the main flow pipe 5 and each second heater 7, which provides stable support and protects the components of the heater assembly, so as to prevent external objects from accidentally hitting the components of the heater and reduce the risk of damage.

[0061] In one specific embodiment, referring to Figure 1 The bottom end of the rack 13 is provided with a walking wheel 14. The walking wheel 14 enables the rack 13 to easily move between different positions, and the operator can adjust the position of the rack 13 at any time to move the entire heater assembly to the appropriate position according to the actual position of the water chiller, so as to facilitate the connection between the heater assembly and the water chiller.

[0062] In one specific embodiment, referring to Figure 1 The first heater 1 comprises a heater body and a power controller (not shown in the figure). The power controller is connected with the heater body and is used to control the heating power of the heater body. The control accuracy of the power controller is usually affected by the size of the heating power controlled by the power controller. The greater the controllable power of the power controller, the lower the output accuracy.

[0063] In this embodiment, referring to Figure 1 The heater assembly is provided with a heater body with a maximum heating power of 6kW, and two second heaters 7 with a constant heating power of 5kW. The power range of the heater body controlled by the power controller is 0kW to 6kW. Compared with the prior art which only provides one heater with a maximum heating power of 16kW, the power controller of this embodiment has higher accuracy when controlling smaller power. This is because the smaller controllable power range enables the power controller to more accurately respond to the control signal during adjustment, thereby achieving more stable heating power output, more accurately simulating or maintaining the required temperature condition, ensuring the performance of the entire heater assembly, and ensuring the accuracy of the evaluation of the refrigeration effect of the water chiller.

[0064] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. The present disclosure is not limited to the precise construction described above and shown in the attached drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the claims that follow. Thus, if these modifications and variations fall within the scope of the claims and their equivalents, it is the intention that the present application encompass such modifications and variations.

Claims

1. A heater assembly, characterized in that, include: The system comprises a first heater, a connecting pipe, a flow sensor, an outlet pipe, a controller, a control circuit, a main pipe, a detection pipe, and at least one second heater. The heating power of the first heater is adjustable, while the heating power of the second heater is constant. The first heater and each of the second heaters are connected in series via the connecting pipe, wherein the last second heater is connected to the outlet pipe; The outlet pipe is connected to the main flow pipe and the detection pipe, and the main flow pipe and the detection pipe are connected in parallel. The control circuit is electrically connected to the first heater and each of the second heaters; The flow sensor is installed in the detection pipe and is used to detect the flow rate of the fluid in the detection pipe; The controller is connected to the flow sensor and the control circuit, and is used to receive the flow rate of the fluid detected by the flow sensor. If the flow rate of the fluid is less than a preset flow rate threshold, it sends a power-off command to the control circuit.

2. The heater assembly according to claim 1, characterized in that, It also includes thermal fuses; Both the first heater and each of the second heaters are equipped with the aforementioned temperature fuse; One end of the temperature fuse is electrically connected to the control circuit, and the other end of the temperature fuse extends into the corresponding first heater and second heater.

3. The heater assembly according to claim 1 or 2, characterized in that, It also includes a temperature sensor; The temperature sensor is provided in the detection pipe and each of the connecting pipes. The temperature sensor is used to detect the temperature of the corresponding connecting pipe and the fluid inside the detection pipe; The controller is connected to the temperature sensor and is used to receive the temperature of the fluid detected by the temperature sensor. If the temperature of the fluid reaches a preset temperature threshold, it sends a power-off command to the control circuit.

4. The heater assembly according to claim 3, characterized in that, It also includes a pressure sensor installed in the detection pipeline; The pressure sensor is used to detect the pressure of the fluid inside the detection pipe; The controller is connected to the pressure sensor and is used to receive the fluid pressure detected by the pressure sensor. If the fluid pressure reaches a first preset pressure threshold, it sends a power-off command to the control circuit.

5. The heater assembly according to claim 1, characterized in that, It also includes alarms; The controller is connected to the alarm and is used to send an activation command to the alarm when the flow rate of the fluid detected by the flow sensor is less than a preset flow rate threshold.

6. The heater assembly according to claim 1, characterized in that, It also includes safety valves; The safety valve is located in the water outlet pipe and is used to automatically open and release pressure when the pressure in the water outlet pipe reaches a second preset pressure threshold.

7. The heater assembly according to claim 6, characterized in that, It also includes an automatic air vent valve; The water outlet pipe and each of the connecting pipes are equipped with the automatic air vent valve.

8. The heater assembly according to claim 1, characterized in that, It also includes shelves; The shelf is connected to the first heater, the main pipe, and each of the second heaters.

9. The heater assembly according to claim 8, characterized in that, The shelf is equipped with wheels at the bottom.

10. The heater assembly according to claim 1, characterized in that, The first heater includes a heater body and a power controller; The power controller is connected to the heater body and is used to control the heating power of the heater body.

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