CN211977317U

CN211977317U - Refrigeration and preheating drive control circuit and electrical equipment

Info

Publication number: CN211977317U
Application number: CN202020289022.5U
Authority: CN
Inventors: 陈林江; 王勋; 李正周
Original assignee: Guangzhou Potent Medical Equipment Joint-Stock Inc
Current assignee: Guangzhou Potent Medical Equipment Joint-Stock Inc
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-11-20
Anticipated expiration: 2030-03-10

Abstract

The utility model relates to a refrigeration and preheating drive control circuit and electrical equipment, wherein the equidirectional output end of a first switch circuit is connected with the first input end of a first gate circuit, and the reverse output end of the first switch circuit is connected with the first input end of a third gate circuit; the same-direction output end of the second switch circuit is connected with the first input end of the second gate circuit, and the reverse-direction output end of the second switch circuit is connected with the first input end of the fourth gate circuit; the ground reference end of the first door control module is connected with the potential pull-up circuit, and the power supply end of the first door control module is used for being connected with a direct-current high-voltage source; second input ends of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit are respectively used for connecting an external level signal source; and the output ends of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit are used for being connected to the TEC refrigeration preheating control module. The utility model discloses can realize rapid heating up and cooling, be applicable to most electrical equipment, especially high-power electrical equipment.

Description

Refrigeration and preheating drive control circuit and electrical equipment

Technical Field

The utility model relates to an electronic circuit technical field, in particular to refrigeration and preheating drive control circuit and electrical equipment.

Background

Currently, more and more devices need preheating starting and cooling heat dissipation to ensure normal operation. However, in the conventional technology, a driving control circuit for part of cooling and heating has small driving capability. With the improvement of power requirements of electric equipment, although some refrigerating and heating devices with higher output load power exist, the circuit structure is more complex, not perfect and inconvenient to drive and control, and if the voltage drop of the load is lower, long-time overcurrent can cause adverse effects such as damage to the circuit. Therefore, the conventional technology has less limitation in the loaded refrigerating and heating apparatus.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a cooling and preheating drive control circuit and an electric apparatus.

In one embodiment, the present invention provides a refrigeration and preheat drive control circuit, comprising: the method comprises the following steps: the gate control device comprises a first switch circuit, a second switch circuit, a first gate control module, a second gate control module and a potential pull-up circuit;

the input ends of the first switch circuit and the second switch circuit are used for accessing external level signals which are opposite to each other; the first gate control module comprises a first gate circuit and a second gate circuit; the second gate control module comprises a third gate circuit and a fourth gate circuit;

the same-direction output end of the first switch circuit is connected with the first input end of the first gate circuit, and the reverse-direction output end of the first switch circuit is connected with the first input end of the third gate circuit;

the same-direction output end of the second switch circuit is connected with the first input end of the second gate circuit, and the reverse-direction output end of the second switch circuit is connected with the first input end of the fourth gate circuit;

the ground reference end of the first door control module is connected with the potential pull-up circuit, and the power supply end of the first door control module is used for being connected with a direct-current high-voltage source;

the second input ends of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit are respectively used for connecting an external level signal source; and the output ends of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit are used for being connected to the TEC refrigeration preheating control module.

In one embodiment, the first switching circuit includes a first switching device, a first transistor, a first pull-down resistor, and a first pull-up resistor;

the second switch circuit comprises a second switch device, a second triode, a second pull-down resistor and a second pull-up resistor;

the output end of the first switching device is respectively connected with one end of the first pull-down resistor and the base electrode of the first triode; the collector of the first triode is connected with the first pull-up resistor; the emitter of the first triode and the other end of the first pull-down resistor are both grounded; the input end of the first switching device is used as the input end of the first switching circuit, and the output end of the first switching device is used as the reverse output end of the first switching circuit; the collector of the first triode is used as the equidirectional output end of the first switch circuit;

the input end of the second switching device is used as the input end of the second switching circuit, and the output end of the second switching device is respectively connected with one end of the second pull-down resistor and the base electrode of the second triode; the collector of the second triode is connected with the second pull-up resistor; the emitter of the second triode and the other end of the second pull-down resistor are both grounded; the output end of the second switching device is used as the input end of the second switching circuit, and the output end of the second switching device is used as the reverse output end of the second switching circuit; and the collector of the second triode is used as the same-direction output end of the second switching circuit.

In one embodiment, the first switching device and the second switching device are photo-couplers.

In one embodiment, the potential boosting circuit comprises a third triode, a first voltage stabilizing diode, a second voltage stabilizing diode and a third pull-down resistor;

the positive electrode of the first voltage stabilizing diode is respectively connected with the emitting electrode of the third triode and the ground reference end of the first door control module; the cathode of the first voltage stabilizing diode is connected with the cathode of the second voltage stabilizing diode and is used for being connected to a direct-current high-voltage source; the base electrode of the third triode is respectively connected with the anode of the second voltage stabilizing diode and one end of the third pull-down resistor; the other end of the third pull-down resistor and the collector of the third triode are both grounded.

In one embodiment, the device further comprises a first diode and a second diode, wherein the two cathodes of the first diode and the second diode are connected with each other;

the anode of the first diode is connected with the equidirectional output end of the first switch circuit; the anode of the second diode is connected with the equidirectional output end of the second switch circuit; and the junction of the cathodes of the first diode and the second diode is used as an external level signal source and is connected with the second input ends of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit respectively.

In one embodiment, the device further comprises a signal trigger, a fourth triode and a third pull-up resistor;

the input end of the signal trigger is connected with the negative electrode connecting part, and the output end of the signal trigger is connected with the base electrode of the fourth triode; the emitter of the fourth triode is grounded, and the joint of the collector of the fourth triode and one end of the third pull-up resistor is connected to the second input ends of the first gate circuit and the second gate circuit; the other end of the third pull-up resistor is connected with a direct-current high-voltage source.

In one embodiment, the controller further comprises a voltage-stabilized power supply module for supplying power to the second gate control module, a reset circuit, a first resistor and a second resistor;

the voltage stabilizing power supply module is connected with the voltage detection end of the reset circuit; one end of the first resistor is respectively connected with the reset end of the reset circuit, the second input end of the third gate circuit, the second input end of the fourth gate circuit and the input end of the signal trigger; the other end of the first resistor is respectively connected with one end of the second resistor and the negative electrode connecting part; the other end of the second resistor is grounded.

In one embodiment, the circuit further comprises an enabling circuit connected with the base of the fourth triode.

In one embodiment, the present invention also provides an electrical device comprising a refrigeration and pre-heat drive control circuit and a TEC refrigeration pre-heat control module connected to the refrigeration and pre-heat drive control circuit.

In one embodiment, the TEC refrigeration pre-heat control module comprises a first filter circuit connected to the cold side of the TEC refrigeration pre-heat control module and a second filter circuit connected to the hot side of the TEC refrigeration pre-heat control module.

The utility model provides a refrigeration and preheat drive control circuit and electrical equipment and have following technological effect at least:

the utility model discloses a refrigeration and preheating drive control circuit and electrical equipment, first switch circuit and second switch circuit's input is used for inserting each other is opposite outside level signal. The input end of the first door control module is respectively connected with the first switch circuit and the second switch circuit, and the input end of the second door control module is also respectively connected with the first switch circuit and the second switch circuit. The output ends of the first door control module and the second door control module are connected to the TEC refrigeration and pre-heating control module. Meanwhile, the ground reference end of the first door control module is also connected with a potential pull-up circuit, and the power supply end is used for connecting a direct-current high-voltage source. Therefore, the utility model discloses each embodiment can be based on first door control module, second door control module to combine first switch circuit and second switch circuit, not only improved the response speed of refrigeration and preheating. Meanwhile, the potential of the ground reference end of the first door control module is pulled up through the potential pull-up circuit, and the driving capability of the TEC refrigeration preheating control module is enhanced by matching with an external direct-current high-voltage source. The embodiment of the utility model provides a circuit structure is simple and the integrated level is higher, can realize quick temperature rise and cooling, and can be applicable to most electrical equipment, especially powerful electrical equipment.

Drawings

Fig. 1 is a schematic structural diagram of a refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 2 is another schematic diagram of the refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first switching circuit of the refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a second switching circuit of the refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 5 is another schematic diagram of the first switching circuit of the refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 6 is another schematic diagram of the second switch circuit of the refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a potential boosting circuit of the refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an external level signal source in the refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 9 is another schematic diagram of the refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 10 is another schematic diagram of the refrigeration and warm-up driving control circuit according to an embodiment of the present invention;

fig. 11 is another schematic diagram of the refrigeration and warm-up driving control circuit according to an embodiment of the present invention;

fig. 12 is another schematic diagram of the refrigeration and warm-up driving control circuit according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a regulated power supply module of the refrigeration and warm-up driving control circuit according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a reset circuit of the refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of an enable circuit in the refrigeration and preheating driving control circuit according to an embodiment of the present invention;

fig. 16 is another schematic diagram of an enable circuit in the refrigeration and preheat drive control circuit according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of an electrical apparatus according to an embodiment of the present invention;

fig. 18 is a schematic structural diagram of a TEC refrigeration and pre-heating control module of an electrical device according to an embodiment of the present invention.

Detailed Description

Hereinafter, various embodiments of the present invention will be described more fully. The present invention is capable of various embodiments and of being modified and varied therein. However, it should be understood that: there is no intention to limit the scope of the invention to the specific embodiments disclosed herein, but rather, the invention is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the invention.

Hereinafter, the terms "includes" or "may include" used in various embodiments of the present invention indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to refer only to the particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combination of the foregoing.

In various embodiments of the present invention, the expression "at least one of a or/and B" includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.

Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.

It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.

The term "user" as used in various embodiments of the present invention may indicate a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).

The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. Terms such as those defined in commonly used dictionaries will be interpreted as having a meaning that is the same as a contextual meaning in the related art and will not be interpreted as having an idealized or overly formal meaning unless expressly so defined herein in various embodiments of the present invention.

Referring to fig. 1, in one embodiment, the present invention provides a refrigeration and preheat drive control circuit, comprising: a first switch circuit 110, a second switch circuit 120, a first gate control module 130, a second gate control module 150, and a potential pull-up circuit 140.

The input terminals IN1 and IN2 of the first switch circuit 110 and the second switch circuit 120 are used for receiving external level signals opposite to each other; first gate control module 130 includes a first gate circuit 130a and a second gate circuit 130 b; the second gate control module 150 includes a third gate circuit 150a and a fourth gate circuit 150 b.

The same direction output terminal of the first switch circuit 110 is connected to the first input terminal 1A of the first gate circuit, and the reverse direction output terminal of the first switch circuit is connected to the first input terminal 3A of the third gate circuit.

The same-direction output terminal of the second switch circuit 120 is connected to the first input terminal 2A of the second gate circuit, and the reverse-direction output terminal of the second switch circuit is connected to the first input terminal 4A of the fourth gate circuit.

The ground reference terminal of the first gate control module 130 is connected to the potential pull-up circuit 140, and the power terminal of the first gate control module 130 is connected to the dc high voltage source 160.

Second input terminals

1B, 2B, 3B and 4B of the first gate circuit 130a, the second gate circuit 130B, the third gate circuit 150a and the fourth gate circuit 160a are respectively used for connecting an external level signal source 180; the outputs of the first gate circuit 130a, the second gate circuit 130b, the third gate circuit 150a and the fourth gate circuit 150b are for connection to the TEC refrigeration pre-heating control module 170.

As shown in fig. 3, the embodiment of the present invention can be applied to a TEC (thermo Electric cooler) refrigeration preheating control module 170 in the prior art adopted in an electrical device, which includes four switching tubes, such as two P-type MOS switching tubes forming a set of upper arm switching tubes Q11 and Q12, and another two N-type MOS switching tubes forming a set of lower arm switching tubes Q13 and Q14, and the cooling or preheating is realized by turning on the corresponding diagonal switching tubes to change the current flow direction of the cold end 1 and the hot end 2 of the TEC refrigerator, and the preheating and cooling principle thereof are not repeated herein.

The first door control module 130 controls a set of switching tubes, such as upper arm switching tubes, of the TEC refrigeration pre-heating control module 170, and the second door control module 150 controls lower arm switching tubes. Because the cold end 1 and the hot end 2 of the TEC refrigerator are changed in current direction by turning on and off the diagonal switch tubes according to the TEC refrigeration and preheating control module 170, so as to realize the working principle of refrigeration and preheating. Therefore, in order to achieve the improvement of the driving capability, it is preferable that the ground reference terminal of the first gate control module 130 controlling the switch tube of the upper arm of one group is not directly grounded and is not at zero potential, but is connected to the potential boosting circuit 140, so as to increase the common reference potential of the circuit. Meanwhile, the power end is connected to the dc high voltage source 160, so as to pull up the potential of the ground reference end of the first gate control module 130, so as to adapt to the high-power electrical equipment, and satisfy the driving capability of the TEC refrigeration preheating control module 170 of the high-power electrical equipment. Further, the first gate control module 130 and the second gate control module 150 adopt digital logic control, so that the driving capability is large, and meanwhile, the response speed is fast and the integration is easy. The embodiment of the utility model provides a can drive high-power electrical equipment's refrigeration and preheating on the whole, rapid heating up cooling.

Further, in order to ensure that the switch tube on one diagonal is turned on, the switch tube on the other diagonal is turned off, and therefore, the input terminals of the first switch circuit 110 and the second switch circuit 120 are used for receiving external level signals that are opposite to each other. The same-direction output terminal of the first switch circuit 110 is connected to the first input terminal 1A of the first gate circuit 130a, and the inverted-direction output terminal of the first switch circuit 110 is connected to the first input terminal 3A of the third gate circuit 150 a. The same-direction output terminal of the second switch circuit 120 is connected to the first input terminal 2A of the second gate circuit 130a, and the reverse-direction output terminal of the second switch circuit 120 is connected to the first input terminal 4A of the fourth gate circuit 150 b. And

second input terminals

1B, 2B, 3B, 4B of the first gate circuit 130a, the second gate circuit 130B, the third gate circuit 150a, and the fourth gate circuit 150B are maintained in a high state or a low state by connecting an external level signal source 180. Further, when the output terminals of the first gate circuit 130a, the second gate circuit 130b, the third gate circuit 150a and the fourth gate circuit 150b are connected to the input terminal of the corresponding switch tube of the TEC refrigeration preheating control module 170, the switch tube on the corresponding opposite corner can be turned on or off according to the digital logic control principle, so as to change the current directions of the cold terminal 1 and the hot terminal 2 of the load TEC refrigerator to realize heating or cooling. The first gate control module 130 and the second gate control module 150 may include nand gate modules or and gate modules, that is, the gate control modules included in the first gate control module 130 and the second gate control module 150 may both be nand gate modules, both be and gate modules, or one is a nand gate module and one is an and gate module.

The voltage range of the dc high voltage source 160 is 24V-36V, preferably 24V. The first and

second switching circuits

110 and 120 may include any one of a photo coupler or a PNP transistor.

For example, the first gate control module 130 of the embodiment of the present invention includes a nand gate module U3 such as 74HC00, the second gate control module 150 includes a and gate module U4 such as 74HC08, and the external level signal source 180 provides a high level signal to the second input terminal 1B of the first gate circuit in the nand gate module U3, the second input terminal 2B of the second gate circuit, and the second input terminal 3B of the third gate circuit in the and gate module U4, the second input terminal 4B of the fourth circuit. The ground reference of the nand gate module U3 is connected to the potential boosting circuit 140, and the power supply is connected to the dc high voltage source 160, so as to increase the driving capability of the nand gate module U3. And the DC high voltage source is 24V DC. The output end 1Y of the first gate circuit in the nand gate module U3 is connected to the upper arm switching tube Q12 of the TEC refrigeration and pre-heating control module, the output end 2Y of the second gate circuit is connected to the upper arm switching tube Q11, the output end 3Y of the third gate circuit in the and gate module U4 is connected to the lower arm switching tube Q14, and the output end 4Y of the fourth gate circuit is connected to the lower arm switching tube Q13.

When the heating of the TEC refrigerating and preheating control module is started, for example, the input of the not gate module U3 is given high level, and the input of the and gate module U4 is given low level. At this time, the first switch circuit 110 is not turned on, and the second switch circuit 120 is turned on. The same-direction output end of the first switch circuit 110 outputs a high level, and the reverse-direction output end outputs a low level; the same-direction output terminal of the second switching circuit 120 outputs a low level, and the reverse-direction output terminal outputs a high level. Thus, the first input terminal 1A of the first gate circuit in the nand gate block U3 is at a high level, the first input terminal 2B of the second gate circuit is at a low level, the first input terminal 3A of the third gate circuit in the and gate block U4 is at a low level, and the first input terminal 4A of the fourth gate circuit is at a high level. Since the second input terminal 1B of the first gate circuit, the second input terminal 2B of the second gate circuit, the second input terminal 3B of the third circuit and the second input terminal 4B of the fourth gate circuit provide high level signals, the output terminal 1Y of the first gate circuit of the nand gate module U3 outputs low level, and the output terminal 2Y of the second gate circuit outputs high level; and the 3Y of the third gate circuit of the and gate module U4 outputs low level and the output terminal 4Y of the fourth gate circuit outputs high level. Therefore, when Q11 and Q14 are conducting, Q12 and Q13 are not conducting, current flows from cold side 1 to hot side 2, and the TEC refrigerator starts to heat.

When the cooling of the TEC cooling and preheating control module is started, for example, the input end of the not gate module U3 is given low level, and the input end of the and gate module U4 is given high level. At this time, the first switch circuit 110 is turned on, and the second switch circuit 120 is turned off. The same-direction output end of the first switch circuit 110 outputs a low level, and the reverse-direction output end outputs a high level; the same-direction output terminal of the second switching circuit 120 outputs a high level, and the reverse-direction output terminal outputs a low level. Thus, the first input terminal 1A of the first gate circuit in the nand gate block U3 is at low level, the first input terminal 2A of the second gate circuit is at high level, the first input terminal 3A of the third gate circuit in the and gate block U4 is at high level, and the first input terminal 4A of the fourth gate circuit is at low level. Since the second input terminal 1B of the first gate circuit, the second input terminal 2B of the second gate circuit, the second input terminal 3B of the third circuit and the second input terminal 4B of the fourth gate circuit provide high level signals, the output terminal 1Y of the first gate circuit of the nand gate module U3 outputs high level, and the output terminal 2Y of the second gate circuit outputs low level; and 3Y of the third gate circuit of the and gate module U4 outputs high level, and the output terminal 4Y of the fourth gate circuit outputs low level. Therefore, at this time, Q11 and Q14 are not conducting, Q12 and Q13 are conducting, current flows from hot side 2 to cold side 1, and the TEC refrigerator starts cooling.

The utility model discloses a refrigeration and preheat drive control circuit, first switch circuit 110 and second switch circuit 120's input is used for inserting each other is opposite outside level signal. The input terminal of the first gate control module 130 is connected to the first switch circuit 110 and the second switch circuit 120, respectively, and the input terminal of the second gate control module 150 is also connected to the first switch circuit 110 and the second switch circuit 120, respectively. The outputs of the first door control module 130 and the second door control module 150 are connected to the TEC refrigeration pre-heating control module 170. Meanwhile, the ground reference terminal of the first gate control module 130 is further connected to a potential boosting circuit 140, and a power terminal is used for connecting a direct-current high-voltage source 160. Therefore, the embodiment of the present invention can be based on the first door control module 130 and the second door control module 150, and combines the first switch circuit 110 and the second switch circuit 120, so as to not only improve the response speed of refrigeration and preheating. Meanwhile, the potential of the ground terminal of the first gate control module 130 is pulled up by the potential pull-up circuit 140, and the driving capability of the TEC refrigeration preheating control module 170 is enhanced by matching with the external dc high-voltage source 160. The embodiment of the utility model provides a circuit structure is simple and the integrated level is higher, can realize quick temperature rise and cooling, and can be applicable to most electrical equipment, especially powerful electrical equipment.

Referring to fig. 1, 3 and 4, in a specific embodiment, the first switching circuit includes a first switching device T1, a first transistor Q1, a first pull-down resistor R11 and a first pull-up resistor R12.

The second switching circuit includes a second switching device T2, a second transistor Q2, a second pull-down resistor 21, and a second pull-up resistor R22.

The output end of the first switching device T1 is respectively connected with one end of a first pull-down resistor R11 and the base electrode of a first triode Q1; the collector of the first triode Q1 is connected with a first pull-up resistor R12; the emitter of the first triode Q1 and the other end of the first pull-down resistor R11 are grounded; an input terminal of the first switching device T1 serves as an input terminal IN1 of the first switching circuit, and an output terminal of the first switching device T1 serves as an inverting output terminal of the first switching circuit; the collector of the first transistor Q1 serves as the unidirectional output of the first switching circuit.

The output end of the second switching device T2 is respectively connected to one end of a second pull-down resistor R21 and the base of a second triode Q2; the collector of the second triode Q2 is connected with a second pull-up resistor R22; the emitter of the second triode Q2 and the other end of the second pull-down resistor R21 are grounded; an input end of a second switching device T2 is used as an input end of the second switching circuit, and an output end of the second switching device T2 is used as an inverted output end of the second switching circuit; and the collector of the second triode Q2 is used as the same-direction output end of the second switching circuit.

For example, as shown in fig. 2, the first gate control module is a nand gate module U3, the second gate control module is a and gate module U4, and the external level signal source 180 provides a high level, where an output terminal 1Y of the first gate in the nand gate module U3 is connected to an upper arm switch Q12 of the TEC refrigerating and preheating control module 170, an output terminal 2Y of the second gate circuit is connected to the upper arm switch Q11, an output terminal 3Y of the third gate in the and gate module U4 is connected to a lower arm switch Q14, and an output terminal 4Y of the fourth gate circuit is connected to the lower arm switch Q13. As shown in fig. 3 and 4, the first and second switching devices T1 and T2 may be a photo-coupler or a PNP transistor. When the first switching device is a PNP triode, its base serves as the input terminal IN1 of the first switching circuit, and its collector serves as the inverted output terminal IO 1; when the second switching device is a PNP transistor, its base serves as the input terminal IN2 of the second switching circuit and its collector serves as the inverted output terminal IO 2. When the first switching device is a photocoupler, the cathode of the incident end of the first switching device is used as the input end IN1 of the first switching circuit, and the emitter is used as the inverted output end IO 1. When the second switching device is a photocoupler, the cathode of the incident end of the second switching device is used as the input end IN2 of the second switching circuit, and the emitter is used as the inverted output end IO 2.

The heating of the TEC refrigeration pre-heat control module is initiated, for example, by applying a high voltage to the input IN1 of the first door control module and a low voltage to the input IN2 of the second door control module. The first switching device T1 is non-conductive and the second switching device T2 is conductive. The output IO1 of the first switching device T1 outputs a low level to the first input terminal 3A of the third gate circuit due to the first pull-down resistor R11 pulling the potential low, and the first transistor Q1 is non-conductive, and the potential of the first input terminal 1A of the first gate circuit is pulled up to a high level by the first pull-up resistor R12 at the collector of the first transistor Q1. The output IO2 of the second switching device T2 outputs a high level to the first input terminal 4A of the fourth gate circuit, and the second transistor Q2 is turned on, and the collector of the turned-on second transistor Q2 pulls the potential of the first input terminal 2A of the second gate circuit down to a low level. Therefore, as shown in fig. 2, the output terminal 1Y of the first gate circuit of the nand gate U3 outputs a low level, and the output terminal 2Y of the second gate circuit outputs a high level; and the 3Y of the third gate circuit of the and gate module U4 outputs low level and the output terminal 4Y of the fourth gate circuit outputs high level. Therefore, when Q11 and Q14 are conducting, Q12 and Q13 are not conducting, current flows from cold side 1 to hot side 2, and the TEC refrigerator starts to heat.

The TEC refrigeration pre-heating control module is enabled for cooling, for example, by providing a low level to the input IN1 of the first door control module and a high level to the input IN2 of the second door control module. The first switching device T1 is conductive and the second switching device T2 is non-conductive. The output end IO1 of the first switching device T1 outputs a high level to the first input end 3A of the third gate circuit, and the first triode Q1 is turned on, and the collector of the turned-on first triode Q1 pulls down the potential of the first input end 1A of the first gate circuit to a low level. The output IO2 of the second switching device T2 outputs a low level to the first input terminal 4A of the fourth gate circuit due to the potential being pulled down by the second pull-down resistor R21, and the second transistor Q2 is non-conductive, and the potential of the first input terminal 2A of the second gate circuit is pulled up to a high level by the second pull-up resistor R22 at the collector of the second transistor Q2. Therefore, as shown in fig. 2, the output terminal 1Y of the first gate circuit of the nand gate U3 outputs high level, and the output terminal 2Y of the second gate circuit outputs low level; and 3Y of the third gate circuit of the and gate module U4 outputs high level, and the output terminal 4Y of the fourth gate circuit outputs low level. Therefore, at this time, Q11 and Q14 are not conducting, Q12 and Q13 are conducting, current flows from hot side 2 to cold side 1, and the TEC refrigerator starts cooling.

The first switch circuit further comprises current limiting resistors Ra and Rb, and the other end of the first pull-up resistor R12 is connected to an external power source VCC. The second switch circuit further comprises current limiting resistors Rc and Rd, and the other end of the second pull-up resistor R22 is connected to an external power source VCC.

The utility model discloses refrigeration and preheat drive control circuit, its first switch circuit and second switch circuit include switching device, triode, pull-down resistance and pull-up resistance respectively, after receiving each other for reverse level signal, can realize syntropy output and reverse output to can realize digital logic control to each gate circuit in first gate control module and the second gate control module, in order to realize preheating the diagonal angle on-off control of switch tube in the control module to TEC refrigeration. Meanwhile, the weak signals can be amplified to large-amplitude signals through the triodes in the first switch circuit and the second switch circuit, and the driving capability of the circuit is further increased. The embodiment of the utility model provides a circuit structure is comparatively perfect, and the integrated level is higher, and the cost is lower, when guaranteeing first door control module and second door control module stability control, helps improving the driving force.

Referring to fig. 5 and 6, in a specific embodiment, the first switching device and the second switching device are opto-couplers.

The negative electrode of the incident end of the photoelectric coupler U6 is used as the input end IN1 of the first switch circuit, and the emitter is respectively connected with one end of the first pull-down resistor R11 and the base electrode of the first triode Q1 and is used as the reverse output end IO1 of the first switch circuit. And the negative pole of the photoelectric coupler U7 is used as the input end of the second switch circuit, and the emitter is respectively connected with one end of the second pull-down resistor R21 and the base of the second triode Q2, and is used as the reverse output end IO2 of the second switch circuit.

The utility model discloses refrigeration and preheating drive control circuit include photoelectric coupler among first switch circuit and the switch circuit, play isolation protection's effect. The interference caused by the high-power output of the load can be prevented, so that the input and the output can be completely isolated. The embodiment of the utility model provides a when can drive high-power load electrical equipment, improved the reliability of circuit.

Preferably, the current limiting resistors Rf and Rg can be added to improve the reliability of the circuit.

Referring to fig. 1 and 7, in a specific embodiment, the potential boosting circuit includes a third transistor Q3, a first zener diode D1, a second zener diode D2, and a third pull-down resistor R31.

The anode of the first zener diode D1 is connected to the emitter of the third transistor Q3 and the ground reference terminal GND of the first gate control module 130, respectively, and the cathode of the first zener diode D1 is connected to the cathode of the second zener diode D2 and is used for being connected to the dc high voltage source 160; the base electrode of the third triode Q3 is respectively connected with the anode of the second voltage-stabilizing diode D2 and one end of the third pull-down resistor R31; the other end of the third pull-down resistor R3 and the collector of the third transistor Q3 are both grounded.

The third transistor Q3 is a PNP transistor. The third transistor Q3 is turned on by the pull-down of the third pull-down resistor R3, and the second zener diode D2 ensures that the base of the third transistor Q3 is maintained at a high potential voltage, and the first zener diode D1 also ensures that the emitter of the turned-on third transistor Q3 is maintained at a high potential voltage. Therefore, the third transistor Q3 can pull up the potential of the ground reference terminal GND of the first gate control module 130 through the first zener diode D1 and the second zener diode D2 to cooperate with the external dc high voltage source 160 to improve the driving capability. Further, the parameters of the zener diode and the third pull-down resistor R31 may depend on the actual circuit design, so that the potential level of the ground reference terminal GND of the first gate control module 130 is pulled up. Further, filter capacitors Ca and Cb are included.

For example, as shown in fig. 2, the first gate control module 130 includes an nand gate module U3 such as 74HC00, preferably, the third pull-down resistor R31 has a resistance of 5.6K Ω, and the first zener diode D1 and the second zener diode D2 are 6.2V zener diodes. Therefore, the third triode Q3 is turned on under the pull-down of the third pull-down resistor R31, the base voltage of the third triode Q3 is stabilized at 6.2V by the second zener diode D2, and the emitter of the turned-on third triode Q3 is also stabilized at 6.2-17.8V by the first zener diode D1.

The utility model discloses refrigeration and preheating drive control circuit, electric potential pull-up circuit 140 include third triode Q3, first zener diode D1, second zener diode D2 and third pull-down resistance R31, and its circuit structure is simple and easily realize, has effectively pulled up the electric potential position of first door control module 130 earthing terminal reference end to the improvement of driving force has been realized. Thereby the embodiment of the utility model provides a can be applicable to the electrical equipment of high-power load to drive the TEC refrigeration preheating control module 170 of the electrical equipment of high-power load.

Referring to fig. 1 and 8, in a specific embodiment, a first diode D11 and a second diode D22, having their cathodes interconnected, are also included.

The anode of the first diode D11 is connected to the unidirectional output terminal of the first switch circuit 110; the anode of the second diode D22 is connected to the unidirectional output terminal of the second switch circuit 120; the cathode junction of the first diode D11 and the second diode D22 is used as an external level signal source 180 and is connected with respective second input terminals of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit.

Since the output terminals of the first switch circuit 110 and the second switch circuit 120 are used for receiving external level signals opposite to each other, the cathodes of the first diode D11 and the second diode D22 are both at a high level, and the junction of the cathodes of the first diode D11 and the second diode D22 is used as the external level signal source 180. The negative connection is connected to the respective second input terminals of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit to be maintained in a high state.

The utility model discloses refrigeration and preheating drive control circuit through first diode D11 and second diode D22 as outside level signal source 180, provides level signal for first door control module 130 and second door control module 150 to help cooperating the electric potential to draw and rise circuit 140 and realize powerful refrigeration and preheat the drive.

As shown in fig. 9, preferably, the first gate control module includes a nand gate module U3, the second gate control module includes a gate control module U4, the first switch device is a photo coupler U6, and the second switch device is a photo coupler U7. The positive electrode of the first diode D11 is connected to the emitter of the photocoupler U6; the positive electrode of the second diode D22 is connected with the emitter of the photoelectric coupler U7; the cathode junction of the first diode D11 and the second diode D22 is used as an external level signal source and is connected to the

second input terminals

1B, 2B, 3B and 4B of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit respectively.

Referring to fig. 10, in a specific embodiment, the signal trigger 10, a fourth transistor Q4 and a third pull-up resistor R32 are further included.

The input end of the signal trigger 10 is connected with the negative electrode connection part, and the output end of the signal trigger 10 is connected with the base electrode of the fourth triode Q4; the emitter of the fourth triode Q4 is grounded, and the junction of the collector of the fourth triode Q4 and one end of the third pull-up resistor R3 is connected to the

second input terminals

1B and 2B of the first gate circuit 130a and the second gate circuit 130B; the other end of the third pull-up resistor R32 is connected with a direct-current high-voltage source.

The signal flip-flop 10 may be a nand chip or a PNP transistor. As shown in fig. 11, if the signal flip-flop is a nand gate chip U5, two

input terminals

5A and 5B of one gate circuit are connected to the negative connection, and the output terminal 5Y is connected to the base of the fourth transistor Q5. Since the cathode junction of the first diode D11 and the second diode D22 is a high level signal, the output terminal 5Y of the nand gate chip U5 outputs a low level to the base of the fourth transistor Q4, the fourth transistor Q4 is not turned on, and the potential of the second input terminal 1B of the first gate circuit 130a is pulled up to a high level by the third pull-up resistor R32. If the signal trigger is a PNP triode, the base electrode is connected to the negative electrode connection part, and the collector electrode is connected to the base electrode of the fourth triode Q4. Since the negative connection point of the first diode D11 and the second diode D22 is a high level signal, the PNP transistor is not turned on, the fourth transistor Q4 is not turned on, and the potential of the first input terminal 2B of the first gate circuit is pulled up to a high level by the third pull-up resistor R32.

The utility model discloses refrigeration and preheating drive control circuit, through signal trigger 10, fourth triode Q4 and third pull-up resistance R32, with the level signal output of the negative pole junction of first diode D11 and second diode D22 as outside level signal source output for first door control circuit. The circuit structure is perfect, the signal trigger 10 and the fourth triode Q4 are used for outputting a signal with a large amplitude to the first gate control module, the first gate control module with the driving capability improved through the signal with the large amplitude is facilitated to be controlled, and the first gate control module can stably drive the TEC refrigeration and preheating driving circuit.

Referring to fig. 12, in a specific embodiment, a voltage regulator module 20 for supplying power to the second gate control module, a reset circuit 30, a first resistor R1, and a second resistor R2 are further included.

The stabilized voltage supply module 20 is connected with the voltage detection end of the reset circuit 30; one end of the first resistor R1 is connected to the reset terminal of the reset circuit 30, the second input terminal 3B of the third gate circuit 150a, the second input terminal 4B of the fourth gate circuit 150B, and the input terminal of the signal flip-flop 10, respectively, and the other end of the first resistor R1 is connected to one end of the second resistor R2 and the negative connection point, respectively; the other end of the second resistor R2 is connected to ground.

The regulated power supply module 20 provides a dc low voltage power supply to the second gate circuit module, and outputs a fault signal to the voltage detection terminal of the reset circuit 30 when an overvoltage or an overcurrent occurs. At this time, the reset terminal of the reset circuit 30 outputs a low level reset signal, and the high level signal at the cathode connection of the first diode D11 and the second diode D22 is divided by the reset signal and pulled down through the first resistor R1 and the second resistor R2. The

second inputs

3B, 4B of the third gate circuit 150a and the fourth gate circuit 150B of the second gate control module are therefore low. Meanwhile, the input terminal of the signal flip-flop 10 is turned to a low level state, the output terminal outputs a high level, the fourth transistor Q4 is turned on, the collector of the fourth transistor Q4 is at a low level, and at this time, the second input terminals of the first gate circuit 130a and the second gate circuit 130b of the first gate control module are at a low level. In normal operation, the external level signals are output to the

second input terminals

1B, 2B, 3B, and 4B of the first gate circuit 130a, the second gate circuit 130B, the third gate circuit 150a, and the fourth gate circuit 150B at high level, and the level signals of the respective first input terminals are switched to realize cooling and heating. When faults such as overvoltage or overcurrent occur, the level of an external level signal supplied to the second input end of each gate circuit is converted into a low level due to the reset signal of the reset circuit 30, and the first input end of each gate circuit is converted along with the low level, so that the conduction of the diagonal switch tube of the TEC refrigeration preheating driving circuit is disabled, the TEC refrigeration preheating driving circuit stops working, and the protection effect is realized.

At this time, for example, the first door control module controls a group of switching tubes of the TEC refrigerating and preheating control module, such as an upper arm switching tube, and the second door control module controls a lower arm switching tube. The first door control module includes a nand door module such as 74HC00 and the second door control module includes an and door module 74HC 08. When overcurrent or overvoltage faults occur, the output ends 1Y and 2Y of the first gate circuit and the second gate circuit in the NAND gate module output high levels, and the output ends 3Y and 4Y of the third gate circuit and the fourth gate circuit in the AND gate module output low levels, so that the diagonal conduction of the TEC refrigeration preheating driving circuit fails, and the TEC refrigeration preheating driving circuit stops working.

The utility model discloses refrigeration and preheating drive control circuit possess excessive pressure overcurrent protection, have further improved the reliability and the security of circuit, prevent that the device in the circuit from being destroyed.

Referring to fig. 13, in a specific embodiment, the regulated power supply module includes a regulator chip U2, a diode D3, a regulator diode D4, a fuse F1, a capacitor C1, a resistor R4, and a resistor R29. The voltage output end OUT of the voltage stabilizing chip U2 is connected to the voltage detection end of the reset circuit and the power supply input end of the second gate control module. The input terminal IN of the regulator chip U2 is connected to a power supply, such as an external dc high voltage source. Further, a light emitting diode D5 is included to act as an indicator light.

Referring to fig. 14, in a specific embodiment, the reset circuit includes a reset chip U9 and a diode D6, the ground terminal GND of the reset chip is grounded, the voltage detection terminal C is connected to the voltage output terminal of the regulated power supply module, and the reset terminal RET is connected to the first resistor R1, the second input terminal 3B of the third gate circuit, the second input terminal 4B of the fourth gate circuit, and the input terminal of the signal flip-flop through the diode D6, so as to perform the functions of isolating and preventing the backflow. Further, the device also comprises a resistor R40, a resistor R50 and a capacitor C8.

The utility model discloses refrigeration and preheating drive control circuit, circuit structure is more perfect, helps improving the reliability of circuit.

Referring to fig. 12, in one embodiment, an enable circuit 40 is also included that is coupled to the base of the fourth transistor Q4.

The normal during operation, the fourth triode does not switch on when inputing high level signal to the enabling circuit to make the utility model discloses the refrigeration with preheat drive control circuit and enable and keep operating condition. Preferably, the PWM signal is input to the enabling circuit, the input frequency range can be 0-10kHz, and the full-load output can also be realized. The embodiment of the utility model provides a can make refrigeration and preheat drive control circuit steady operation, help realizing adjustable power output simultaneously to can adjust the speed of refrigeration or preheating according to the user demand.

Referring to fig. 15 and 12, the enable circuit may further include a photo coupler U1, a resistor R60 electrically connected to the positive input terminal of the photo coupler U1, a resistor R65 connected to the emitter, and a diode D9. The negative electrode input end of the photoelectric coupler U1 is used as the input end ENA of the enabling circuit, the emitting electrode is connected with the fourth triode Q4, and the positive electrode input end and the collecting electrode are connected with an external power supply. When the refrigeration and preheating driving control circuit works normally, when a high-level signal is input to the negative electrode input end of the photoelectric coupler U1, the fourth triode Q4 is not conducted, so that the refrigeration and preheating driving control circuit is enabled and keeps a working state.

The utility model discloses refrigeration and preheating drive control circuit still include enabling circuit, and its enabling circuit can include optoelectronic coupler U1, therefore when making the ability and guaranteeing to be in operating condition, can play the isolation. The input and output are completely isolated while high-power driving is satisfied, damage to a circuit caused by faults is prevented, and adjustable power output is facilitated.

Referring to fig. 12 and 16, the enable circuit may further include a PNP transistor Q10, a resistor R70 and a resistor R75 connected to the base of the PNP transistor Q10, a resistor R80 connected to the collector, and a diode D10. The base of the PNP transistor Q10 is used as the input end ENA of the enable circuit, and the collector is connected to the fourth transistor Q4. When the PNP triode Q10 works normally, when a high level signal is input to the base electrode of the PNP triode Q10, the fourth triode Q4 is not conducted, and therefore the refrigeration and preheating driving circuit is enabled and keeps a working state.

The utility model discloses refrigeration and preheating drive control circuit still includes enabling circuit, and its enabling circuit can include PNP triode Q10, therefore when making the ability and guaranteeing to be in operating condition, helps realizing adjustable power output.

Referring to fig. 1 and 17, in one embodiment, the present invention also provides an electrical device comprising a cooling and preheating drive control circuit 190 and a TEC cooling and preheating control module 170 connected to the cooling and preheating drive control circuit.

The electrical apparatus of the embodiments of the present invention may include, but is not limited to, a laser treatment machine and an LED lighting apparatus. Preferably, the TEC refrigerating and pre-heating control module 170 according to the embodiment of the present invention includes a set of upper arm P-type MOS transistors Q11 and Q12, and a set of lower arm N-type MOS transistors Q13 and Q14. The grid of the MOS transistor Q12 is connected with the output end 1Y of the first gate circuit, the grid of the MOS transistor Q11 is connected with the output end 2Y of the second gate circuit, the grid of the MOS transistor Q13 is connected with the output end 4Y of the fourth gate circuit, and the grid of the MOS transistor Q14 is connected with the output end 3Y of the third gate circuit. The sources of the MOS transistor Q11 and the MOS transistor Q12 are connected with a power supply. The sources of the MOS transistor Q13 and the MOS transistor Q14 are grounded. The drain electrodes of the MOS transistor Q11 and the MOS transistor Q13 are connected in series, and the drain electrodes of the MOS transistor Q12 and the MOS transistor Q14 are connected in series.

It should be noted that, the refrigeration and preheating driving control circuit 190 according to the embodiment of the present invention can refer to the limitation description of the refrigeration and preheating driving control circuit in each of the above embodiments, which is not described herein again.

The utility model discloses electrical equipment, including refrigeration and preheating drive control circuit 190 and TEC refrigeration preheating control module 170. In the refrigeration and preheating driving control circuit 190, the input ends of the first switch circuit and the second switch circuit are used for accessing external level signals which are opposite to each other. The input end of the first door control module is respectively connected with the first switch circuit and the second switch circuit, and the input end of the second door control module is also respectively connected with the first switch circuit and the second switch circuit. The outputs of the first and second door control modules are connected to the TEC refrigeration pre-heating control module 170. Meanwhile, the ground reference end of the first door control module is also connected with a potential pull-up circuit, and the power supply end is used for connecting a direct-current high-voltage source. Therefore, the embodiment of the utility model provides a can be based on first door control module, second door control module to combine first switch circuit and second switch circuit, not only improved the response speed of refrigeration and preheating. Meanwhile, the potential of the ground terminal of the first gate control module is pulled up through the potential pull-up circuit, and the driving capability of the TEC refrigeration preheating control module 170 is enhanced by matching with an external direct-current high-voltage source. The embodiment of the utility model provides a circuit structure is simple and the integrated level is higher, can realize quick temperature rise and cooling, and can be applicable to most electrical equipment, especially powerful electrical equipment.

Referring to fig. 18, in one particular embodiment, the TEC refrigeration preheat control module includes a first filter circuit 60 coupled to the cold side 1 of the TEC refrigeration preheat control module and a second filter circuit 70 coupled to the hot side 2 of the TEC refrigeration preheat control module.

The utility model discloses electrical equipment, circuit structure is simple and easily realize, through first filter circuit 60 and second filter circuit 70, can strengthen electrical equipment's interference killing feature and filtering capability.

Referring to fig. 18, a fuse F2 connected to the cold side 1 or the hot side 2 of the TEC refrigerating and preheating control module is further included, thereby further improving the reliability of the circuit.

Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.

Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.

The sequence numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the implementation scenario. The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.

Claims

1. Refrigeration and preheat drive control circuitry, comprising: the gate control device comprises a first switch circuit, a second switch circuit, a first gate control module, a second gate control module and a potential pull-up circuit;

the ground reference end of the first door control module is connected with the potential pull-up circuit, and the power supply end of the first door control module is used for connecting a direct-current high-voltage source;

second input ends of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit are respectively used for being connected with an external level signal source; the output ends of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit are used for being connected to a TEC refrigeration and preheating control module.

2. The cooling and pre-heating drive control circuit according to claim 1, wherein the first switching circuit includes a first switching device, a first transistor, a first pull-down resistor, and a first pull-up resistor;

the output end of the first switching device is respectively connected with one end of the first pull-down resistor and the base electrode of the first triode; the collector of the first triode is connected with the first pull-up resistor; the emitter of the first triode and the other end of the first pull-down resistor are both grounded; an input end of the first switching device is used as an input end of the first switching circuit, and an output end of the first switching device is used as the inverted output end of the first switching circuit; a collector of the first triode is used as the same-direction output end of the first switching circuit;

the input end of the second switching device is used as the input end of the second switching circuit, and the output end of the second switching device is respectively connected with one end of the second pull-down resistor and the base electrode of the second triode; the collector of the second triode is connected with the second pull-up resistor; the emitter of the second triode and the other end of the second pull-down resistor are both grounded; an output end of the second switching device is used as an input end of the second switching circuit, and an output end of the second switching device is used as the inverted output end of the second switching circuit; and the collector of the second triode is used as the same-direction output end of the second switching circuit.

3. The cooling and preheating drive control circuit according to claim 2, wherein the first switching device and the second switching device are photocouplers.

4. The cooling and pre-heating drive control circuit of claim 1, wherein the potential boost circuit comprises a third transistor, a first zener diode, a second zener diode, and a third pull-down resistor;

the positive electrode of the first voltage stabilizing diode is respectively connected with the emitting electrode of the third triode and the ground reference end of the first door control module; the cathode of the first voltage stabilizing diode is connected with the cathode of the second voltage stabilizing diode and is used for being connected to the direct-current high-voltage source; the base electrode of the third triode is respectively connected with the anode of the second voltage-stabilizing diode and one end of the third pull-down resistor; the other end of the third pull-down resistor and the collector of the third triode are both grounded.

5. The cooling and preheating drive control circuit according to claim 1, further comprising a first diode and a second diode having two cathodes connected to each other;

the anode of the first diode is connected with the equidirectional output end of the first switch circuit; the anode of the second diode is connected with the same-direction output end of the second switch circuit; and the negative electrode connection part of the first diode and the second diode is used as the external level signal source and is connected with the second input ends of the first gate circuit, the second gate circuit, the third gate circuit and the fourth gate circuit respectively.

6. The cooling and pre-heating drive control circuit of claim 5, further comprising a signal trigger, a fourth transistor, and a third pull-up resistor;

the input end of the signal trigger is connected with the negative electrode connecting part, and the output end of the signal trigger is connected with the base electrode of the fourth triode; the emitter of the fourth triode is grounded, and the junction of the collector of the fourth triode and one end of the third pull-up resistor is connected to the second input ends of the first gate circuit and the second gate circuit; the other end of the third pull-up resistor is connected with the direct-current high-voltage source.

7. The cooling and warming drive control circuit of claim 6, further comprising a regulated power supply module for powering the second gate control module, a reset circuit, a first resistor and a second resistor;

the voltage stabilizing power supply module is connected with the voltage detection end of the reset circuit; one end of the first resistor is respectively connected with a reset end of the reset circuit, a second input end of the third gate circuit, a second input end of the fourth gate circuit and an input end of the signal trigger; the other end of the first resistor is respectively connected with one end of the second resistor and the negative electrode connecting part; the other end of the second resistor is grounded.

8. The cooling and pre-heating drive control circuit of claim 6, further comprising an enable circuit connected to a base of the fourth transistor.

9. An electrical apparatus comprising the cooling and warming drive control circuit according to any one of claims 1 to 8, and a TEC cooling warming control module connected to the cooling and warming drive control circuit.

10. The electrical device of claim 9, wherein the TEC refrigeration preheat control module comprises a first filter circuit connected to a cold side of the TEC refrigeration preheat control module and a second filter circuit connected to a hot side of the TEC refrigeration preheat control module.