Temperature protection control device

Abstract

The utility model discloses a temperature protection control device, and relates to the field of circuits. The device comprises a first temperature control module, a second temperature control module and a protection switch, the protection switch comprises a coil and a contact, and the contact of the protection switch is connected between a power supply and a target loop; the first temperature control module and the second temperature control module are connected in series in a control loop of the protection switch and are used for controlling the on-off of a contact of the protection switch; the first temperature control module is used for controlling the contact of the protection switch to be disconnected when the temperature is lower than a first temperature threshold value; the second temperature control module is used for controlling the contact of the protection switch to be disconnected when the temperature is higher than a second temperature threshold value; wherein the first temperature threshold value is lower than the second temperature threshold value. The target loop can be prevented from running at an inappropriate temperature, the risk is reduced, and the service life of the target loop is protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit technical field especially is related to a temperature protection control device. BACKGROUND

[0002] In power electronic system, some electronic devices and equipment have certain requirements for environmental temperature when running, and if the temperature threshold is exceeded, it may not be able to start or run with risk, resulting in reduced service life or damage. Based on this, it is necessary to propose a temperature protection control device to avoid electronic devices or equipment running in unsuitable temperature. SUMMARY

[0003] Therefore, the present application provides a temperature protection control device, which mainly aims to solve the technical problem of target equipment running at risk in unsuitable environmental temperature.

[0004] The utility model provides a temperature protection control device, and the device includes first temperature control module, second temperature control module and protection switch, the protection switch includes coil and contact, the contact of protection switch is connected between power supply and target loop, first temperature control module and second temperature control module are connected in series in the control loop of protection switch, and the contact of protection switch is controlled, first temperature control module is used for controlling the contact of protection switch to open when temperature is lower than first temperature threshold, second temperature control module is used for controlling the contact of protection switch to open when temperature is higher than second temperature threshold, and wherein first temperature threshold is lower than second temperature threshold.

[0005] In some embodiments, one end of the coil of the protection switch is connected with the first output end of the power supply, the other end of the coil is connected with the second output end of the power supply, the first temperature control module, the second temperature control module and the coil of the protection switch are connected in series, and the contact of the protection switch is normally open; when the temperature is lower than the first temperature threshold, the first temperature control module controls the control loop of the protection switch to be disconnected; when the temperature is higher than the second temperature threshold, the second temperature control module controls the control loop of the protection switch to be disconnected; when the temperature is between the first temperature threshold and the second temperature threshold, the first temperature control module and the second temperature control module control the control loop of the protection switch to be closed.

[0006] In some embodiments, the device further comprises a master control switch connected between the power supply and the target loop, and connected between the power supply and the control loop; the protection switch comprises a first contact and a second contact, the first contact is connected between the power supply and the target loop, and the second contact is connected with a processor for outputting a feedback signal.

[0007] In some embodiments, the first temperature control module comprises a first control relay and a first temperature switch, the first control relay comprises a coil and a first contact, one end of the coil of the first control relay is connected with one output end of the power supply through the first temperature switch, the other end of the coil of the first control relay is connected with the other output end of the power supply; the second temperature control module comprises a second control relay and a second temperature switch, the second control relay comprises a coil and a first contact, one end of the coil of the second control relay is connected with one output end of the power supply through the second temperature switch, the other end of the coil of the second control relay is connected with the other output end of the power supply; the first contact of the first control relay and the first contact of the second control relay are connected in series in the control loop of the protection switch.

[0008] In some embodiments, the first contact of the first control relay is normally closed, the first contact of the second control relay is normally closed; when the temperature is lower than the first temperature threshold, the first temperature switch is closed; when the temperature is higher than or equal to the first temperature threshold, the first temperature switch is opened; when the temperature is higher than the second temperature threshold, the second temperature switch is closed; when the temperature is lower than or equal to the second temperature threshold, the second temperature switch is opened.

[0009] In some embodiments, the device further comprises a heating loop and a cooling loop; the control end of the heating loop is connected with the first temperature control module, when the temperature is lower than the first temperature threshold, the first temperature control module controls the heating loop to run; when the temperature is higher than the first temperature threshold, the first temperature control module controls the heating loop to stop running; the control end of the cooling loop is connected with the second temperature control module, when the temperature is higher than the second temperature threshold, the second temperature control module controls the cooling loop to run; when the temperature is lower than the second temperature threshold, the second temperature control module controls the cooling loop to stop running.

[0010] In some embodiments, the first control relay further comprises a second contact, the second contact of the first control relay is connected with the control end of the heating loop, and the second contact is normally open.

[0011] In some embodiments, the second control relay further comprises a second contact, the second contact of the second control relay is connected with the control end of the cooling loop, and the second contact is normally open.

[0012] In some embodiments, the first control relay and the second control relay are time relays, and the first contact of the first control relay and the first contact of the second control relay are both delayed to close.

[0013] In some embodiments, the first control relay and the second control relay are time relays, and the second contact of the first control relay and the second contact of the second control relay are both delayed to open.

[0014] By the above technical solution, the temperature protection control device provided by the utility model sets the protection switch between the target loop and the power supply, and the on-off of the protection switch is controlled by the temperature control module. When the temperature exceeds the preset temperature range, the contacts of the protection switch will be disconnected, and the target loop will not be powered on. Only when the temperature is within the preset temperature range, the protection switch will be closed, and the target loop will be powered on and run. The above scheme can avoid the target loop running in an unsuitable temperature, reduce the risk, and protect the service life of the target loop.

[0015] The above description is only a summary of the technical solutions of the application. In order to more clearly understand the technical means of the application, the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the utility model, and constitute a part of the application. The schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute an improper limitation on the utility model. In the drawings:

[0017] Figure 1 A structure schematic view of a temperature protection control device provided by an embodiment of the utility model is shown;

[0018] Figure 2 A structure schematic view of another temperature protection control device provided by an embodiment of the utility model is shown;

[0019] Figure 3 A structure schematic view of still another temperature protection control device provided by an embodiment of the utility model is shown;

[0020] Figure 4 A structure schematic view of still another temperature protection control device provided by an embodiment of the utility model is shown.

[0021] Illustration:

[0022] 10, first temperature control module; 20, second temperature control module; KM, protection switch; KM-a, first contact of protection switch; KM-b, second contact of protection switch; QF, main control switch; KH1, first temperature control switch; KH2, second temperature control switch; KT1, first control relay; KT1-a, first contact of first control relay; KT1-b, second contact of first control relay; KT2, second control relay; KT2-a, first contact of second control relay; KT2-b, second contact of second control relay. DETAILED DESCRIPTION

[0023] Hereinafter, the present application will be described in detail with reference to the accompanying drawings and embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0024] In the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified. The term "and / or" describes the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which means that A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents a "or" relationship between the associated objects.

[0025] In one embodiment, as shown in Figure 1 A structural diagram of a temperature protection control device is provided, which includes a first temperature control module 10, a second temperature control module 20, and a protection switch KM. The protection switch KM includes a coil and a contact, and the contact of the protection switch KM is connected between a power supply and a target loop. The first temperature control module 10 and the second temperature control module 20 are connected in series in the control loop of the protection switch KM, and are used to control the on-off of the contact of the protection switch KM. The first temperature control module 10 is used to control the contact of the protection switch KM to be disconnected when the temperature is lower than a first temperature threshold. The second temperature control module 20 is used to control the contact of the protection switch KM to be disconnected when the temperature is higher than a second temperature threshold. The first temperature threshold is lower than the second temperature threshold.

[0026] The target circuit is a controlled circuit. The protection switch KM can be a relay or a contactor. The first temperature threshold and the second temperature threshold can be set and adjusted according to actual conditions, for example, the first temperature threshold can be set to 0°C, and the second temperature threshold can be set to 65°C.

[0027] When the ambient temperature is lower than the first temperature threshold, the contacts of the protection switch KM are controlled to be opened by the first temperature control module 10, at this time, the target circuit is disconnected from the power supply, and the target circuit is not powered on. When the ambient temperature is higher than the second temperature threshold, the contacts of the protection switch KM are controlled to be opened by the second temperature control module 20, at this time, the target circuit is also not powered on. Therefore, in this way, the target circuit can be prevented from running in an unsuitable temperature (i.e. outside the preset temperature range), reducing the risk of damage to the target circuit and improving the service life of the target circuit.

[0028] In one embodiment, the control circuit of the protection switch KM is used to control the power-on and power-off of the coil of the protection switch KM. One end of the coil of the protection switch KM is connected to the first output end of the power supply, and the other end of the coil is connected to the second output end of the power supply. Wherein, the two output ends of the power supply are positive and negative, or live and neutral. The first temperature control module 10, the second temperature control module 20 and the coil of the protection switch KM are connected in series. That is, the first temperature control module 10, the second temperature control module 20, the coil of the protection switch KM, the first output end of the power supply, and the second output end of the power supply form the control circuit of the protection switch KM. The first temperature control module 10 and the second temperature control module 20 jointly control the on-off of the control circuit, that is, the power-on and power-off of the coil of the protection switch KM.

[0029] Wherein, the contacts of the protection switch KM are normally open. When the temperature is lower than the first temperature threshold, the control circuit of the protection switch KM is controlled to be opened by the first temperature control module 10, at this time, the contacts of the protection switch KM are opened, and the target circuit is not powered on. When the temperature is higher than the second temperature threshold, the control circuit of the protection switch KM is controlled to be opened by the second temperature control module 20, at this time, the contacts of the protection switch KM are opened, and the target circuit is also not powered on. When the temperature is between the first temperature threshold and the second temperature threshold, the control circuit of the protection switch KM is controlled to be closed by the first temperature control module 10 and the second temperature control module 20 at the same time, at this time, the coil of the protection switch KM is powered on, the contacts of the protection switch KM are closed, and the target circuit is powered on. In this way, the target circuit can be controlled to run within the preset temperature range.

[0030] In one embodiment, as Figure 2As shown, the temperature protection control device provided in this embodiment also includes a main control switch QF. The main control switch QF is connected between the power supply and the target circuit, and between the power supply and the control circuit. Specifically, the main control switch QF can be a circuit breaker or a miniature circuit breaker. The main control switch QF is a double-pole double-throw switch, and the two output terminals of the power supply are respectively connected to one of the switches in the main control switch QF. The power supply status of the power supply to the target circuit and the temperature protection control device can be controlled through the main control switch QF. The main control switch QF can be an overcurrent protection switch or a manual control switch.

[0031] In one embodiment, the protective switch KM may include multiple contacts, such as a first contact KM-a and a second contact KM-b. The first contact KM-a is connected between the power supply and the target circuit, used to control the power supply to the target circuit. The second contact KM-b can be connected to a backend processor or controller to send feedback signals. The feedback signal is used to indicate the power supply status to the target circuit or the temperature status of the target circuit, such as whether the current temperature is within a preset temperature range. Specifically, the second contact KM-b can be normally open or normally closed. When the coil of the protective switch KM is energized, it simultaneously controls the operation of both the first contact KM-a and the second contact KM-b. Therefore, the opening and closing state of the second contact KM-b can determine the temperature status of the target circuit and whether it is powered on.

[0032] In one embodiment, such as Figure 3 As shown, the first temperature control module 10 includes a first control relay KT1 and a first temperature control switch KH1. The first control relay KT1 includes a coil and a first contact KT1-a. One end of the coil of the first control relay KT1 is connected to one output terminal of the power supply through the first temperature control switch KH1, and the other end of the coil of the first control relay KT1 is connected to the other output terminal of the power supply.

[0033] The second temperature control module 20 includes a second control relay KT2 and a second temperature control switch KH2. The second control relay KT2 includes a coil and a first contact KT2-a. One end of the coil of the second control relay KT2 is connected to one output terminal of the power supply through the second temperature control switch KH2, and the other end of the coil of the second control relay KT2 is connected to the other output terminal of the power supply.

[0034] The first contact KT1-a of the first control relay KT1 and the first contact of the second control relay KT2 are connected in series in the control circuit of the protection switch KM.

[0035] In the above embodiment, the power-on and power-off of the coil of the protection switch KM is controlled by the on-off of the first contact KT1-a of the first control relay KT1 and the first contact KT2-a of the second control relay KT2, and in turn the power-on and power-off of the target loop is controlled. The on-off of the first contact KT1-a of the first control relay KT1 is controlled by the first temperature control switch KH1, and the on-off of the first contact KT2-a of the second control relay KT2 is controlled by the second temperature control switch KH2.

[0036] When the temperature is lower than the first temperature threshold, the first temperature control switch KH1 controls the first contact KT1-a of the first control relay KT1 to be open, and when the temperature is higher than the first temperature threshold, the first temperature control switch KH1 controls the first contact KT1-a of the first control relay KT1 to be closed. When the temperature is higher than the second temperature threshold, the second temperature control switch KH2 controls the first contact KT2-a of the second control relay KT2 to be open, and when the temperature is lower than the second temperature threshold, the second temperature control switch KH2 controls the first contact KT2-a of the second control relay KT2 to be closed.

[0037] Specifically, in one embodiment, the first contact KT1-a of the first control relay KT1 is normally closed, and the first contact KT2-a of the second control relay KT2 is normally closed. When the temperature is lower than the first temperature threshold, the first temperature control switch KH1 is closed, the coil of the first control relay KT1 is powered on, and the first contact KT1-a is open; when the temperature is higher than or equal to the first temperature threshold, the first temperature control switch KH1 is open, the coil of the first control relay KT1 is powered off, and the first contact KT1-a is closed.

[0038] Similarly, when the temperature is higher than the second temperature threshold, the second temperature control switch KH2 is closed, the coil of the second control relay KT2 is powered on, and the first contact KT2-a is open; when the temperature is lower than or equal to the second temperature threshold, the second temperature control switch KH2 is open, the coil of the second control relay KT2 is powered off, and the first contact KT2-a is closed.

[0039] In one embodiment, as shown in Figure 4 The temperature protection control device provided by the embodiment of the present application further includes a temperature rising loop and a temperature falling loop. The control end of the temperature rising loop is connected with the first temperature control module 10, and when the temperature is lower than the first temperature threshold, the first temperature control module 10 controls the temperature rising loop to operate to heat the temperature. When the temperature is higher than the first temperature threshold, the first temperature control module 10 controls the temperature rising loop to stop operating to stop heating the temperature.

[0040] The control end of the cooling circuit is connected with the second temperature control module 20, when the temperature is higher than the second temperature threshold, the second temperature control module 20 controls the cooling circuit to run to cool the temperature. When the temperature is lower than the second temperature threshold, the second temperature control module 20 controls the cooling circuit to stop running.

[0041] Specifically, in one embodiment, the first control relay KT1 further comprises a second contact KT1-b, the second contact KT1-b of the first control relay KT1 is connected with the control end of the heating circuit, and the second contact KT1-b is always open. The second control relay KT2 further comprises a second contact KT2-b, the second contact KT2-b of the second control relay KT2 is connected with the control end of the cooling circuit, and the second contact KT2-b is always open.

[0042] In one embodiment, the first control relay KT1 and the second control relay KT2 are time relays, the first contact KT1-a of the first control relay KT1 and the first contact KT2-a of the second control relay KT2 are both delay-closed. The second contact KT1-b of the first control relay KT1 and the second contact KT2-b of the second control relay KT2 are both delay-opened.

[0043] When the temperature is lower than the first temperature threshold, the first control relay KT1 is powered on when the first temperature control switch KH1 is closed, the first contact KT1-a is opened, and the second contact KT1-b is closed, at this time, the target circuit is not powered on, and the heating circuit heats the temperature; when the temperature is higher than the first temperature threshold, the first control relay KT1 is powered off when the first temperature control switch KH1 is opened, the first contact KT1-a is delay-closed, and the second contact KT1-b is delay-opened, so that the heating circuit can run for a period of time, avoiding the frequent action of the contact caused by the temperature fluctuating around the first temperature threshold, and making the control more stable.

[0044] Similarly, when the temperature is higher than the second threshold, the second control relay KT2 is powered on when the second temperature control switch KH2 is closed, the first contact KT1-a is opened, and the second contact KT2-b is closed, at this time, the target circuit is not powered on, and the cooling circuit cools the temperature; when the temperature is lower than the second temperature threshold, the second control relay KT2 is powered off when the second temperature control switch KH2 is opened, the first contact KT2-a is delay-closed, and the second contact KT2-b is delay-opened, so that the cooling circuit can run for a period of time, avoiding the frequent action of the contact caused by the temperature fluctuating around the second temperature threshold, and making the control process more stable.

[0045] In the above embodiment, the first temperature threshold and the second temperature threshold can be set with a certain redundancy space according to the working temperature of the target circuit, that is, the first temperature threshold can be slightly higher than the lower limit temperature of the working of the target circuit, and the second temperature threshold can be slightly lower than the upper limit temperature of the working of the target circuit. Thus, the target circuit is prevented from operating in an extreme temperature, the operation risk is reduced, and the service life of the target circuit is prolonged.

[0046] In the embodiment of the present application, the specific implementation of the heating circuit and the cooling circuit can be set according to requirements. For example, the heating circuit can be implemented by a heating component such as a heating wire, and the cooling circuit can be implemented by a fan. The second contact KT1-b of the first control relay KT1 can be connected with the power input end of the heating circuit, and the start and stop of the heating circuit are controlled by controlling the power supply. The second contact KT2-b of the second control relay KT2 can be connected with the power input end of the cooling circuit, and the start and stop of the cooling circuit are controlled by controlling the power supply.

[0047] The temperature protection control device provided in the embodiment of the present application sets the upper and lower thresholds of temperature control through two temperature control switches, triggers the time relay for delay and the transfer action of the protection switch KM to control the on-off of the main circuit (the power supply circuit between the power supply and the target circuit), and outputs a control signal to the heating circuit or the cooling circuit, and feeds back the control state to the background. By applying the present scheme, the environmental temperature can be determined before the target circuit is started. If the environmental temperature exceeds the suitable working temperature range and the equipment (the target circuit) is not suitable for starting, the temperature is adjusted to the suitable temperature range through the heating circuit or the cooling circuit, and then the target circuit is started, so that the normal and safe operation of the target circuit is ensured. The present embodiment effectively prevents the starting failure of the equipment (the target circuit) caused by the unsuitable environmental temperature at the initial start or the risky operation of the equipment in an extreme environmental temperature. The temperature protection control device provided in the present embodiment is easy to implement, has strong environmental adaptability, low cost and high reliability.

[0048] It should be noted that the functions of the temperature protection control device provided in the present embodiment are mainly realized through the circuit connection relationship between the circuit modules, and are not dependent on the program modules in the circuit modules. In addition, for the circuit modules that can implant program modules, the implementation of the module functions can be realized by the program modules provided by the prior art.

[0049] Those skilled in the art can understand that the modules or flows in the drawings are not necessarily required for implementing the present application. Those skilled in the art can understand that the modules in the devices in the implementation scenarios can be distributed in the devices in the implementation scenarios according to the description of the implementation scenarios, or can be changed to be located in one or more devices different from the implementation scenarios. The modules in the above implementation scenarios can be combined into one module, or can be further split into multiple sub-modules.

[0050] The above application numbers are only for description, and do not represent the advantages and disadvantages of the implementation scenarios. The above disclosure is only some specific implementation scenarios of the present application, but the present application is not limited thereto, and any variations that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. A temperature protection control device, characterized by, The device comprises a first temperature control module, a second temperature control module and a protection switch; The protection switch comprises a coil and a contact, and the contact of the protection switch is connected between the power supply and the target circuit; The first temperature control module and the second temperature control module are connected in series in the control circuit of the protection switch, and are used for controlling the opening and closing of the contact of the protection switch; The first temperature control module is used for controlling the contact of the protection switch to be opened when the temperature is lower than a first temperature threshold value; The second temperature control module is used for controlling the contact of the protection switch to be opened when the temperature is higher than a second temperature threshold value; The first temperature threshold value is lower than the second temperature threshold value.

2. The temperature protection control device of claim 1, wherein, One end of the coil of the protection switch is connected with a first output end of the power supply, and the other end of the coil is connected with a second output end of the power supply, the first temperature control module, the second temperature control module and the coil of the protection switch are connected in series, and the contact of the protection switch is normally open; When the temperature is lower than the first temperature threshold value, the first temperature control module controls the control circuit of the protection switch to be opened; When the temperature is higher than the second temperature threshold value, the second temperature control module controls the control circuit of the protection switch to be opened; When the temperature is between the first temperature threshold value and the second temperature threshold value, the first temperature control module and the second temperature control module control the control circuit of the protection switch to be closed.

3. The temperature protection control device of claim 1, wherein, The device further comprises a master control switch, which is connected between the power supply and the target circuit, and is connected between the power supply and the control circuit; The protection switch comprises a first contact and a second contact, the first contact is connected between the power supply and the target circuit, and the second contact is connected with a processor and is used for outputting a feedback signal.

4. The temperature protection control device according to claim 1, wherein The first temperature control module comprises a first control relay and a first temperature switch, the first control relay comprises a coil and a first contact, one end of the coil of the first control relay is connected with one output end of the power supply through the first temperature switch, and the other end of the coil of the first control relay is connected with the other output end of the power supply; The second temperature control module comprises a second control relay and a second temperature switch, the second control relay comprises a coil and a first contact, one end of the coil of the second control relay is connected with one output end of the power supply through the second temperature switch, and the other end of the coil of the second control relay is connected with the other output end of the power supply; The first contact of the first control relay and the first contact of the second control relay are connected in series in the control circuit of the protection switch.

5. The temperature protection control device of claim 4, wherein, The first contact of the first control relay is normally closed, and the first contact of the second control relay is normally closed; When the temperature is lower than the first temperature threshold value, the first temperature switch is closed; When the temperature is higher than or equal to the first temperature threshold value, the first temperature switch is opened; When the temperature is higher than the second temperature threshold value, the second temperature switch is closed; The second temperature switch is turned off when the temperature is lower than or equal to the second temperature threshold.

6. The temperature protection control device of claim 4, wherein The device further comprises a temperature-increasing circuit and a temperature-decreasing circuit; The control end of the temperature-increasing circuit is connected with the first temperature control module, the first temperature control module controls the temperature-increasing circuit to run when the temperature is lower than the first temperature threshold, and the first temperature control module controls the temperature-increasing circuit to stop running when the temperature is higher than the first temperature threshold. The control end of the temperature-decreasing circuit is connected with the second temperature control module, the second temperature control module controls the temperature-decreasing circuit to run when the temperature is higher than the second temperature threshold, and the second temperature control module controls the temperature-decreasing circuit to stop running when the temperature is lower than the second temperature threshold.

7. The temperature protection control device of claim 6, wherein The first control relay further comprises a second contact, the second contact of the first control relay is connected with the control end of the temperature-increasing circuit, and the second contact is always open.

8. The temperature protection control device according to claim 6, wherein The second control relay further comprises a second contact, the second contact of the second control relay is connected with the control end of the temperature-decreasing circuit, and the second contact is always open.

9. The temperature protection control device of claim 5, wherein, The first control relay and the second control relay are time relays, the first contact of the first control relay and the first contact of the second control relay are closed after a time delay.

10. The temperature protection control device according to any one of claims 7-8, wherein The first control relay and the second control relay are time relays, the second contact of the first control relay and the second contact of the second control relay are opened after a time delay.

Images