Steam generator control system

Abstract

The utility model discloses a steam generator control system, which relates to the technical field of steam generators, and comprises a power supply module for supplying power; the water level detection module is used for setting a high water level, a low water level and a medium water level and controlling the water inlet control module to work when the water level in the steam generator is lower than the medium water level; the first temperature detection module is used for detecting the temperature of the use water injected into the steam generator; the second temperature detection module is used for detecting the temperature in the steam generator; the temperature comparison module is used for comparing the signal sizes of the first temperature detection module and the second temperature detection module; the heating control module is used for setting a heating threshold value and performing heating control on the use water filled into the steam generator; and the water inlet control module is used for filling use water into the steam generator. According to the steam generator control system, the work cycle of the steam generator can be shortened, meanwhile, damage to the heating pipe caused by large temperature difference is avoided, and the safety of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam generators, in particular to a steam generator control system. Background Art

[0002] Steam generators are commonly used modules in commercial kitchen equipment, mainly used for heating and heat preservation equipment. Compared with the old water heat preservation and heating equipment, they have obvious advantages such as fast start-up speed, less energy waste, and water resource conservation. After the steam generators in the prior art complete the heating and steam control, they cannot be directly filled with cold water within one hour after the water in the equipment is drained to avoid damage to the steam generator, resulting in a longer service life of the steam generator and a reduced user experience, so there is room for improvement. Utility Model Content

[0003] The embodiment of the utility model provides a steam generator control system to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A steam generator control system comprises: a power supply module, a water level detection module, a first temperature detection module, a second temperature detection module, a temperature comparison module, a heating control module and a water inlet control module;

[0006] The power module is used to receive AC power and rectify, filter and stabilize the AC power, and output DC voltage;

[0007] A water level detection module, connected to the power module, for receiving DC voltage regulation and setting high water level, low water level and middle water level, and outputting a first control signal when the water level inside the steam generator is lower than the middle water level;

[0008] A first temperature detection module, connected to the power module, for detecting the temperature of the water poured into the steam generator and outputting a first detection signal;

[0009] A second temperature detection module, connected to the power module, for detecting the temperature inside the steam generator and outputting a second detection signal;

[0010] a temperature comparison module, connected to the first temperature detection module and the second temperature detection module, configured to receive the first detection signal and the second detection signal and output a second control signal when the second detection signal is lower than the first detection signal;

[0011] A heating control module, connected to the first temperature detection module, the temperature comparison module, the power supply module and the water level detection module, for setting a heating threshold and heating the water poured into the steam generator when the first detection signal is lower than the heating threshold and a first control signal is received, and stopping the water heating operation when a second control signal is received;

[0012] The water inlet control module is connected to the temperature comparison module and the water level detection module, and is used to inject water into the steam generator when receiving the second control signal and the first control signal.

[0013] As a further solution of the utility model: the power module includes a power interface and a power processing device; the first temperature detection module includes a first thermistor and a first resistor;

[0014] Preferably, the first end and the second end of the power interface are respectively connected to the first end and the second end of the power processing device, the third end of the power processing device is connected to the first end of the first thermistor, the second end of the first thermistor is connected to the temperature comparison module and connected to the fourth end of the power processing device and the ground through the first resistor.

[0015] As a further solution of the utility model: the second temperature detection module includes a second thermistor and a second resistor; the temperature comparison module includes a first comparator, a first switch tube and a third resistor;

[0016] Preferably, the first end of the second thermistor is connected to the emitter of the first switching tube and the third end of the power processing device, the second end of the second thermistor is connected to the in-phase end of the first comparator and is grounded through the second resistor, the inverting end of the first comparator is connected to the second end of the first thermistor, the output end of the first comparator is connected to the base of the first switching tube, and the collector of the first switching tube is connected to the heating control module and the water inlet control module and is grounded through the third resistor.

[0017] As a further solution of the utility model: the water inlet control module includes a water inlet valve, a second switch tube and a first logic chip;

[0018] Preferably, the base of the second switch tube is connected to the F end of the first logic chip, the B end of the first logic chip is connected to the water level detection module, the A end of the first logic chip is connected to the collector of the first switch tube, the emitter of the second switch tube is grounded, the collector of the second switch tube is connected to one end of the water inlet valve, and the other end of the water inlet valve is connected to the third end of the power supply processing device.

[0019] As a further solution of the utility model: the water level detection module includes a first controller, a first capacitor, a second capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a third capacitor, a seventh resistor, an eighth resistor, a first probe, a second probe and a third probe;

[0020] Specifically, the fourth end and the eighth end of the first controller are connected to one end of the third capacitor, the first end of the seventh resistor and the third end of the power processing device, the other end of the seventh resistor is connected to the third probe, the third end of the first controller is connected to the B end of the first logic chip, the sixth end and the second end of the first controller are connected to one end of the second capacitor and one end of the fifth resistor, the other end of the third capacitor and one end of the sixth resistor through the fourth resistor, the other end of the sixth resistor is connected to the first probe and the second probe through the eighth resistor, the other end of the second capacitor, the other end of the fifth resistor and the first end of the first controller are all grounded, and the fifth end of the first controller is grounded through the first capacitor.

[0021] As a further solution of the utility model: the heating control module includes a ninth resistor, a tenth resistor, a second power supply, a second comparator, a fourth switch tube, a second logic chip, a third switch tube, a first relay, a first power supply, a first relay switch and a motor heater;

[0022] Specifically, the inverting end of the second comparator is connected to the second end of the first thermistor, the non-inverting end of the second comparator is connected to one end of the tenth resistor and is connected to the second power supply through the ninth resistor, the output end of the second comparator is connected to the collector of the fourth switch tube and the A end of the second logic chip, the B end of the second logic chip is connected to the third end of the first controller, the F end of the second logic chip is connected to the base of the third switch tube, the collector of the third switch tube is connected to one end of the first relay, the other end of the first relay is connected to the first power supply, the emitter of the fourth switch tube, the emitter of the third switch tube and the other end of the tenth resistor are all grounded, the base of the fourth switch tube is connected to the collector of the first switch tube, the first moving end and the second moving end of the first relay switch are respectively connected to the first end and the second end of the power interface, and the first static end and the second static end of the first relay switch are respectively connected to the first end and the second end of the electric heater.

[0023] Compared with the prior art, the beneficial effects of the utility model are as follows: the steam generator control system of the utility model detects the water level of the steam generator by a water level detection module, detects the temperature of the water to be poured into the steam generator by a first temperature detection module, detects the temperature inside the steam generator by a second temperature detection module, and when the temperature of the water to be poured into the steam generator is lower than a set heating threshold, heats the water until the temperature inside the steam generator is lower than the temperature of the water to be poured into the steam generator, stops the heating work, and controls the water inlet control module to pour the water into the steam generator, which can shorten the working cycle of the steam generator, avoid damage to the heating pipe due to large temperature difference, and improve the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The present invention provides a schematic block diagram of a steam generator control system.

[0026] Figure 2 A circuit diagram of a steam generator control system provided in an example of the utility model.

[0027] Figure 3 This is a connection circuit diagram of a heating control module provided in an example of the present utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In one embodiment, see Figure 1 , a steam generator control system, comprising: a power supply module 1, a water level detection module 2, a first temperature detection module 3, a second temperature detection module 4, a temperature comparison module 5, a heating control module 6 and a water inlet control module 7;

[0030] Specifically, the power module 1 is used to receive AC power and perform rectification, filtering and voltage stabilization on the AC power, and output DC voltage stabilization;

[0031] The water level detection module 2 is connected to the power module 1, and is used to receive DC voltage regulation and set high water level, low water level and middle water level, and output a first control signal when the water level inside the steam generator is lower than the middle water level;

[0032] A first temperature detection module 3, connected to the power module 1, for detecting the temperature of water poured into the steam generator and outputting a first detection signal;

[0033] A second temperature detection module 4, connected to the power module 1, for detecting the temperature inside the steam generator and outputting a second detection signal;

[0034] A temperature comparison module 5, connected to the first temperature detection module 3 and the second temperature detection module 4, for receiving a first detection signal and a second detection signal and outputting a second control signal when the second detection signal is lower than the first detection signal;

[0035] A heating control module 6 is connected to the first temperature detection module 3, the temperature comparison module 5, the power module 1 and the water level detection module 2, and is used to set a heating threshold and heat the water poured into the steam generator when the first detection signal is lower than the heating threshold and a first control signal is received, and stop heating the water when a second control signal is received;

[0036] The water inlet control module 7 is connected to the temperature comparison module 5 and the water level detection module 2, and is used to inject water into the steam generator when receiving the second control signal and the first control signal.

[0037] In a specific embodiment, the power supply module 1 can adopt a power supply circuit composed of a power supply interface and a power supply processing device, can be connected to AC power and perform rectification, filtering and voltage stabilization on the AC power; the water level detection module 2 can adopt a water level detection circuit composed of a probe, a resistor, a 555 integrated chip, etc., can set a high water level, a middle water level and a low water level and control the operation of the water inlet control module 7 according to the water level state; the first temperature detection module 3 can use a first temperature detection circuit composed of a photoresistor and a resistor to perform temperature detection on the water to be added to the steam generator; the second temperature detection module 4 can use a second temperature detection circuit composed of a photoresistor and a resistor to perform temperature detection on the inside of the steam generator. degree detection; the temperature comparison module 5 can adopt a temperature comparison circuit composed of a comparator, a transistor and a resistor, and can compare the voltage of the signal output by the first temperature detection module 3 and the second temperature detection module 4; the heating control module 6 can adopt a heating control circuit composed of a comparator, a resistor, a logic chip, a transistor, etc., and can heat the water to be poured into the steam generator according to the signal state of the output of the water level detection module 2, the first temperature detection module 3 and the temperature comparison module 5; the water inlet control module 7 can adopt a water inlet control circuit composed of a logic chip, a transistor and a water inlet valve, and the water inlet state is controlled by the signal state of the output of the water level detection module 2 and the temperature comparison module 5.

[0038] In another embodiment, see Figure 1 , Figure 2 and Figure 3 , the power module 1 includes a power interface and a power processing device; the first temperature detection module 3 includes a first thermistor RT1 and a first resistor R1;

[0039] Specifically, the first end and the second end of the power interface are respectively connected to the first end and the second end of the power processing device, the third end of the power processing device is connected to the first end of the first thermistor RT1, the second end of the first thermistor RT1 is connected to the temperature comparison module 5 and connected to the fourth end of the power processing device and the ground through the first resistor R1.

[0040] In a specific embodiment, the power processing device may be composed of a rectifier, a capacitor and a voltage stabilizer to perform rectification, filtering and voltage stabilization. The first thermistor RT1 may be a negative temperature coefficient thermistor.

[0041] Further, the second temperature detection module 4 includes a second thermistor RT2 and a second resistor R2; the temperature comparison module 5 includes a first comparator A1, a first switch tube V1 and a third resistor R3;

[0042] Specifically, a first end of the second thermistor RT2 is connected to the emitter of the first switch tube V1 and the third end of the power processing device, a second end of the second thermistor RT2 is connected to the in-phase end of the first comparator A1 and is grounded through the second resistor R2, an inverting end of the first comparator A1 is connected to the second end of the first thermistor RT1, an output end of the first comparator A1 is connected to the base of the first switch tube V1, and a collector of the first switch tube V1 is connected to the heating control module 6 and the water inlet control module 7 and is grounded through the third resistor R3.

[0043] In a specific embodiment, the second resistor may be a negative temperature coefficient thermistor; the first comparator A1 may be an LM358 comparator; and the second switch tube V2 may be a PNP transistor.

[0044] Furthermore, the water inlet control module 7 includes a water inlet valve, a second switch tube V2 and a first logic chip U1;

[0045] Specifically, the base of the second switch tube V2 is connected to the F end of the first logic chip U1, the B end of the first logic chip U1 is connected to the water level detection module 2, the A end of the first logic chip U1 is connected to the collector of the first switch tube V1, the emitter of the second switch tube V2 is grounded, the collector of the second switch tube V2 is connected to one end of the water inlet valve, and the other end of the water inlet valve is connected to the third end of the power supply processing device.

[0046] In a specific embodiment, the second switch tube V2 may be an NPN transistor to control the power-on state of the water inlet valve, and then control the water inlet operation of the water inlet valve; the first logic chip U1 may be an AND gate chip.

[0047] Further, the water level detection module 2 includes a first controller U2, a first capacitor C1, a second capacitor C2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third capacitor C3, a seventh resistor R7, an eighth resistor R8, a first probe A, a second probe B and a third probe C;

[0048] Specifically, the fourth end and the eighth end of the first controller U2 are connected to one end of the third capacitor C3, the first end of the seventh resistor R7 and the third end of the power processing device, the other end of the seventh resistor R7 is connected to the third probe C, the third end of the first controller U2 is connected to the B end of the first logic chip U1, the sixth end and the second end of the first controller U2 are connected to one end of the second capacitor C2 and connected to one end of the fifth resistor R5, the other end of the third capacitor C3 and one end of the sixth resistor R6 through the fourth resistor R4, the other end of the sixth resistor R6 is connected to the first probe A and connected to the second probe B through the eighth resistor R8, the other end of the second capacitor C2, the other end of the fifth resistor R5 and the first end of the first controller U2 are all grounded, and the fifth end of the first controller U2 is grounded through the first capacitor C1.

[0049] In a specific embodiment, the first probe A sets a high water level, the second probe B sets a middle water level, and the third probe C sets a low water level; the first controller U2 can use a NE555 chip. When the water level is lower than the middle water level, the second end of the first controller U2 is at a low level and is set, and the third end of the first controller U2 will output a high level. When the water level is higher than the high water level, the first controller U2 is reset, and the third end of the first controller U2 will output a low level.

[0050] Further, the heating control module 6 includes a ninth resistor R9, a tenth resistor R10, a second power supply VCC2, a second comparator A2, a fourth switch tube V4, a second logic chip U3, a third switch tube V3, a first relay K1, a first power supply VCC1, a first relay switch K1-1 and a motor heater;

[0051] Specifically, the inverting end of the second comparator A2 is connected to the second end of the first thermistor RT1, the inverting end of the second comparator A2 is connected to one end of the tenth resistor R10 and is connected to the second power supply VCC2 through the ninth resistor R9, the output end of the second comparator A2 is connected to the collector of the fourth switch tube V4 and the A end of the second logic chip U3, the B end of the second logic chip U3 is connected to the third end of the first controller U2, the F end of the second logic chip U3 is connected to the base of the third switch tube V3, the collector of the third switch tube V3 is connected to one end of the first relay K1, the other end of the first relay K1 is connected to the first power supply VCC1, the emitter of the fourth switch tube V4, the emitter of the third switch tube V3 and the other end of the tenth resistor R10 are all grounded, the base of the fourth switch tube V4 is connected to the collector of the first switch tube V1, the first moving end and the second moving end of the first relay switch K1-1 are respectively connected to the first end and the second end of the power interface, and the first static end and the second static end of the first relay switch K1-1 are respectively connected to the first end and the second end of the electric heater.

[0052] In a specific embodiment, the second power supply VCC2, the ninth resistor R9 and the tenth resistor R10 provide a heating threshold; the second comparator A2 can use an LM358 comparator; the third switch tube V3 and the fourth switch tube V4 can use NPN transistors; the second logic chip U3 can use an AND gate chip; the first relay switch K1-1 can use a double-pole double-throw normally open switch, which is controlled by the first relay K1 through magnetic attraction.

[0053] In a steam generator control system of the present embodiment, AC power is connected to the power interface, and then the power processing device rectifies, filters and stabilizes the AC power to provide the required DC voltage stabilization. When the water level inside the steam generator is lower than the middle water level set by the second detection needle, the first controller U2 is set, and the third end of the first controller U2 outputs a high level, which means that water needs to be poured into the steam generator. At this time, the first thermistor RT1 cooperates with the first resistor R1 to detect the temperature of the water to be poured into the steam generator and output a first detection signal. The second thermistor RT2 cooperates with the second resistor R2 to detect the temperature inside the steam generator and output a second detection signal. If the voltage of the second detection signal is lower than the voltage of the first detection signal at this time, , the first comparator A1 will control the first switch tube V1 to be turned on, so that the A terminal of the first logic chip U1 becomes a high level, and the fourth switch tube V4 is turned on. At this time, the first logic chip U1 will control the second switch tube V2 to be turned on, the water inlet valve is energized and controls the use of water to be poured into the steam generator. During the period when the voltage of the second detection signal is greater than the voltage of the first detection signal, if the third terminal of the first controller U2 outputs a high level and the first detection signal is lower than the set heating threshold, the second logic chip U3 will control the third switch tube V3 to be turned on, the first relay K1 is energized, the first relay switch K1-1 is closed, and the electric heater heats the use water to be poured into the steam generator until the voltage of the second detection signal is lower than the voltage of the first detection signal, and the water filling work starts.

[0054] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0055] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steam generator control system, characterized in that: The steam generator control system comprises: a power supply module, a water level detection module, a first temperature detection module, a second temperature detection module, a temperature comparison module, a heating control module and a water inlet control module; The power supply module is used to receive AC power and perform rectification, filtering and voltage stabilization on the AC power, and output DC voltage stabilization; The water level detection module is connected to the power module, and is used to receive DC voltage regulation and set high water level, low water level and middle water level, and output a first control signal when the water level inside the steam generator is lower than the middle water level; The first temperature detection module is connected to the power module and is used to detect the temperature of the water poured into the steam generator and output a first detection signal; The second temperature detection module is connected to the power module and is used to detect the temperature inside the steam generator and output a second detection signal; The temperature comparison module is connected to the first temperature detection module and the second temperature detection module, and is used to receive the first detection signal and the second detection signal and output a second control signal when the second detection signal is lower than the first detection signal; The heating control module is connected to the first temperature detection module, the temperature comparison module, the power supply module and the water level detection module, and is used to set a heating threshold and heat the water poured into the steam generator when the first detection signal is lower than the heating threshold and a first control signal is received, and stop heating the water when a second control signal is received; The water inlet control module is connected to the temperature comparison module and the water level detection module, and is used to inject water into the steam generator when receiving the second control signal and the first control signal.

2. A steam generator control system according to claim 1, characterized in that: The power module includes a power interface and a power processing device; the first temperature detection module includes a first thermistor and a first resistor; The first end and the second end of the power interface are respectively connected to the first end and the second end of the power processing device, the third end of the power processing device is connected to the first end of the first thermistor, the second end of the first thermistor is connected to the temperature comparison module and connected to the fourth end of the power processing device and the ground end through the first resistor.

3. A steam generator control system according to claim 2, characterized in that: The second temperature detection module includes a second thermistor and a second resistor; the temperature comparison module includes a first comparator, a first switch tube and a third resistor; The first end of the second thermistor is connected to the emitter of the first switch tube and the third end of the power processing device, the second end of the second thermistor is connected to the in-phase end of the first comparator and is grounded through the second resistor, the inverting end of the first comparator is connected to the second end of the first thermistor, the output end of the first comparator is connected to the base of the first switch tube, and the collector of the first switch tube is connected to the heating control module and the water inlet control module and is grounded through the third resistor.

4. A steam generator control system according to claim 3, characterized in that: The water inlet control module includes a water inlet valve, a second switch tube and a first logic chip; The base of the second switch tube is connected to the F end of the first logic chip, the B end of the first logic chip is connected to the water level detection module, the A end of the first logic chip is connected to the collector of the first switch tube, the emitter of the second switch tube is grounded, the collector of the second switch tube is connected to one end of the water inlet valve, and the other end of the water inlet valve is connected to the third end of the power supply processing device.

5. A steam generator control system according to claim 4, characterized in that: The water level detection module includes a first controller, a first capacitor, a second capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a third capacitor, a seventh resistor, an eighth resistor, a first probe, a second probe and a third probe; The fourth end and the eighth end of the first controller are both connected to one end of the third capacitor, the first end of the seventh resistor and the third end of the power processing device, the other end of the seventh resistor is connected to the third probe, the third end of the first controller is connected to the B end of the first logic chip, the sixth end and the second end of the first controller are both connected to one end of the second capacitor and connected to one end of the fifth resistor, the other end of the third capacitor and one end of the sixth resistor through the fourth resistor, the other end of the sixth resistor is connected to the first probe and connected to the second probe through the eighth resistor, the other end of the second capacitor, the other end of the fifth resistor and the first end of the first controller are all grounded, and the fifth end of the first controller is grounded through the first capacitor.

6. A steam generator control system according to claim 5, characterized in that: The heating control module includes a ninth resistor, a tenth resistor, a second power supply, a second comparator, a fourth switch tube, a second logic chip, a third switch tube, a first relay, a first power supply, a first relay switch and a motor heater; The inverting end of the second comparator is connected to the second end of the first thermistor, the non-inverting end of the second comparator is connected to one end of the tenth resistor and is connected to the second power supply through the ninth resistor, the output end of the second comparator is connected to the collector of the fourth switch tube and the A end of the second logic chip, the B end of the second logic chip is connected to the third end of the first controller, the F end of the second logic chip is connected to the base of the third switch tube, the collector of the third switch tube is connected to one end of the first relay, the other end of the first relay is connected to the first power supply, the emitter of the fourth switch tube, the emitter of the third switch tube and the other end of the tenth resistor are all grounded, the base of the fourth switch tube is connected to the collector of the first switch tube, the first moving end and the second moving end of the first relay switch are respectively connected to the first end and the second end of the power interface, and the first static end and the second static end of the first relay switch are respectively connected to the first end and the second end of the electric heater.

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