CN112557738B

CN112557738B - Voltage detection device, air conditioning system, voltage detection method, and readable storage medium

Info

Publication number: CN112557738B
Application number: CN202011425039.XA
Authority: CN
Inventors: 孙良伟; 梅利军; 吴田; 苏苓会
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2024-04-16
Anticipated expiration: 2040-12-08
Also published as: CN112557738A

Abstract

The invention provides a voltage detection device, an air conditioning system, a voltage detection method and a readable storage medium. The voltage detection device is used for the multi-split system, and is connected with a host in the multi-split system, and comprises: a communication circuit connected to the host; the voltage acquisition circuit is connected to the communication circuit; the analog load circuit is connected to the communication circuit and used for simulating the load to output the action current so that the voltage acquisition circuit can acquire bus voltage signals under the state that the load at the communication circuit outputs the action current. According to the invention, when the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine to be installed or not through the voltage detection device before installing the slave machine or when detecting whether the voltage deficiency problem exists in the multi-split system after installation, so that the installation difficulty is reduced, and the resource waste and the increase of the installation flow caused by the subsequent installation of the repeater are avoided.

Description

Voltage detection device, air conditioning system, voltage detection method, and readable storage medium

Technical Field

The present invention relates to a voltage detection device, an air conditioning system, a voltage detection method, and a readable storage medium.

Background

In the current communication system of the central air conditioner, a communication bus can communicate and supply power. When the communication line is long, the line resistance is large, which results in insufficient voltage, due to the limitation of the communication line length. In the prior art, whether the communication bus has insufficient voltage or not cannot be detected in the installation process.

Disclosure of Invention

The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

To this end, a first aspect of the invention proposes a voltage detection device.

A second aspect of the present invention proposes an air conditioning system.

A third aspect of the present invention proposes a voltage detection method.

A fourth aspect of the present invention proposes a voltage detection method.

A fifth aspect of the present invention proposes a readable storage medium.

In view of the above, according to a first aspect of the present invention, a voltage detection device is provided for a multi-split system, the voltage detection device is connected to a host in the multi-split system, and the voltage detection device includes: a communication circuit connected to the host; the voltage acquisition circuit is connected to the communication circuit; the analog load circuit is connected to the communication circuit and used for simulating the load to output the action current so that the voltage acquisition circuit can acquire bus voltage signals under the state that the load at the communication circuit outputs the action current.

The voltage detection device is used for detecting the voltage on the communication bus in the multi-connected system, and whether an additional repeater needs to be arranged on the communication bus of the multi-connected system can be determined according to the detection result. The multi-split system comprises a host machine and at least two slave machines connected with the host machine. The voltage detection device is connected to the communication bus of the multi-split system, namely the voltage detection device is in communication connection with the host.

The voltage detection device comprises a communication circuit, a voltage acquisition circuit and an analog load circuit. The communication circuit is connected with a communication bus in the multi-split system, and the voltage detection device can perform signal interaction with the host through the communication circuit. The analog load circuit is capable of simulating the current output by the load to be driven by the communication bus of the host. When the analog load circuit simulates a load output current, the voltage detection device can detect a voltage signal of the analog load at the communication circuit, and the voltage detection device can detect the voltage signal of the analog load without installing a load at a position to be detected. When the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine to be installed or not through the voltage detection device before installing the slave machine or when detecting whether the voltage deficiency exists in the multi-split system after installation is completed, so that the installation difficulty is reduced, and resource waste and increase of an installation flow caused by subsequent installation of the repeater are avoided.

In some embodiments, when installing the multi-split air conditioning system, engineering debugging personnel firstly install and configure the air conditioning host and the communication bus, then configure the installation slaves one by one at the required positions, and before installing the slaves, the voltage detection device provided by the invention detects the voltage of the positions of the slaves required to be installed on the communication bus. The voltage detection device is arranged at the position of the slave machine required to be arranged on the communication bus, and the voltage detection device simulates the action of the electronic expansion valve in the slave machine, so that whether the voltage at the position of the communication bus where the voltage detection device is arranged is enough to drive the action of the electronic expansion valve of the slave machine required to be arranged can be detected. If the voltage on the communication bus is detected to be capable of driving the electronic expansion valve in the slave, the slave is installed to a corresponding position, and if the voltage on the communication bus is detected to be insufficient to drive the electronic expansion valve of the slave, a repeater is installed before the slave is installed, so that the voltage at the slave is increased.

In some embodiments, engineering debugging personnel can detect whether the problem of insufficient communication bus voltage exists in the multi-split air conditioning system which is installed through the voltage detection device provided by the invention. When the slave machine in the installed multi-split air conditioning system fails, engineering debugging personnel can judge whether the air conditioning system needs to be provided with a repeater or not through the voltage detection device.

In these embodiments, the voltage detection device is connected to the furthest end from the host, to the last slave location if the communication line is a hand-held connection, to the longest branch location if the star connection, and to the furthest branch from the host if the tree connection.

In addition, the voltage detection device in the technical scheme provided by the invention can also have the following additional technical characteristics:

in one possible design, an analog load circuit includes: a current source circuit; and a voltage conversion circuit connected to the current source circuit, the voltage conversion circuit being capable of converting a voltage of the current source circuit into a load operation voltage.

In this design, the analog load circuit includes a voltage conversion circuit and a current source circuit. The current source circuit can simulate the action current of a load. One end of the voltage conversion circuit is connected with the current source circuit, and the voltage output by the current source circuit can be converted into the action voltage of the load, so that the damage of the current source circuit caused by overlarge voltage input to the current source circuit is avoided, and the stability of the current output by the current source circuit for simulating the load can be ensured.

In one possible design, the current source circuit includes: a first power supply; the first end of the first switching element is connected with the first power supply, the second end of the first switching element is grounded, and the control end of the first switching element is connected with the first end of the first switching element; the first end of the second switching element is connected with the third end of the voltage conversion circuit, the second end of the second switching element is commonly grounded with the fourth end of the voltage conversion circuit, and the control end of the second switching element is connected with the control end of the first switching element.

In this design, the current source circuit includes a first power supply, a first switching element, and a second switching element. The first end and the control end of the first switching element are connected to the first power supply, and the control end of the second switching element is connected to the control end of the first switching element, so that when the first power supply outputs current, the first end and the control end of the first switching element and the control end of the second switching element are in a power-on state. The second end of the first switching element and the second end of the second switching element are grounded, and the first end and the second end of the second switching element are connected with the voltage conversion module. Therefore, the mirror current source circuit is formed by the first switching element and the second switching element, and can output constant current, so that the action current of the analog load is realized.

The output current of the first power supply and the voltage conversion circuit are reasonably configured, so that the current value output by the current source circuit can be set.

In some embodiments, the operating current of the load is set to 800mA (milliamp).

It is understood that the first switching element and the second switching element are selected as transistors, the base of the transistor is used as the control terminal of the first switching element and the second switching element, and the collector and the emitter of the transistor are the first terminal and the second terminal of the first switching element and the second switching element. The base end of the triode receives the current signal, and the collector to the emitter of the triode is conducted, so that the control ends of the first switching element and the second switching element receive the current signal, and the first end to the second end of the first switching element and the second switching element are conducted.

In some embodiments, a first terminal of the voltage conversion circuit is connected to the voltage acquisition circuit, a second terminal of the voltage conversion circuit is grounded, a third terminal of the voltage conversion circuit is connected to a first terminal of the second switching element, and a fourth terminal of the voltage conversion circuit is connected to a second terminal of the second switching element.

In one possible design, the current source circuit further comprises: and the second end of the first resistive element is connected with the first end of the first switching element.

In this design, a first resistive element is further provided in the current source circuit, the first resistive element is selected as a variable resistor, the current value output by the current source circuit can be directly adjusted by adjusting the resistance value of the variable resistor, and the first resistive element is hereinafter referred to as a first resistor.

The first end of the first resistor is connected to the first power supply, and the second end of the first resistor is connected to the first end of the first switching element. The current output by the first power supply needs to flow through the first resistor before flowing to the position of the first switching element. The voltage of the first power supply is set to be constant, and the current source circuit can be caused to output a set current value by adjusting the resistance value of the first resistor.

In one possible design, the voltage acquisition circuit includes: a second power supply; a second resistive element, the first end of the second resistive element being connected to a second power source; and the first end of the third resistive element is connected with the second end of the second resistive element, the second end of the third resistive element is grounded, and the first end of the third resistive element is used for outputting a bus voltage signal.

In this design, the voltage acquisition circuit includes a second power supply, a second resistive element, and a third resistive element, both of which are selected as resistors, the second resistive element being hereinafter referred to as a second resistance, and the third resistive element being referred to as a third resistance.

The first end of the second resistor is connected to the second power supply, the second end of the second resistor is connected to the first end of the third circuit, and the second end of the third resistor is grounded, namely the second resistor and the third resistor are connected in series with the second power supply. And taking the common end between the second resistor and the third resistor as a voltage sampling end. The second resistor and the third resistor form a voltage dividing circuit, and the divided voltage signal can be detected through the voltage sampling end. From the detected voltage signal it can be determined whether there is sufficient voltage on the communication bus to drive the load to be installed.

In one possible design, the voltage acquisition circuit further comprises: and the first end of the capacitor is connected with the second power supply, and the second end of the capacitor is grounded.

In this design, the voltage acquisition circuit further includes a capacitor having a first end connected to the second power supply and a second end grounded. Wherein the first terminal of the capacitor is further connected to the first terminal of the second resistor in the voltage detection circuit and to the second terminal of the diode. The capacitor can filter the voltage signal output by the second power supply, so that the accuracy of the voltage acquisition circuit in detecting the voltage value is improved.

In one possible design, the communication circuit includes: the first end of the diode is connected with the second power supply; and the communication element is connected to the host through a bus, the first end of the communication element is connected with the second end of the diode, and the second end of the communication element is grounded.

In this design, the communication circuit comprises a diode and a communication element, the communication element is selected to be connected to a load in the communication bus, and the communication element voltage detection device can be used for signal transmission with the host. The communication circuit further includes a diode having a first terminal connected to the second power supply and a first terminal connected to the second terminal of the diode. The diode can limit the flowing direction of the current, and avoid voltage impact on the communication element caused by unstable voltage of the second power supply, thereby avoiding the communication element from being damaged by the voltage impact.

In one possible design, the diode is conductive from the second terminal to the first terminal.

In this design, the first and second ends of the diode are connected to the second power supply and the communication element, respectively. The diode is arranged to be on from the second end to the first end and to be off from the first end to the second end, i.e. the position where current on the communication element and the communication bus of the multiple on-line system can flow through the diode to the second power supply. Conversely, current at the second power supply location cannot flow in reverse through the diode to the location of the communication element. Therefore, the damage of the communication element caused by voltage impact of the second power supply can be effectively avoided.

According to a second aspect of the present invention there is provided an air conditioning system comprising: a host; at least two slaves connected with the master; the voltage detection device according to any one of the possible designs of the first aspect is connected to a host.

The air conditioning system provided by the invention is a multi-split air conditioning system, and comprises a host machine and at least two slave machines, wherein the at least two slave machines are connected with the host machine through a communication bus. The voltage detection device in the first aspect is also connected with a host in the multi-split air conditioning system through a communication bus.

The voltage detection device comprises a communication circuit, a voltage acquisition circuit and an analog load circuit. The communication circuit is connected with a communication bus in the multi-split system, and the voltage detection device can perform signal interaction with the host through the communication circuit. The analog load circuit is capable of simulating the current output by the load to be driven by the communication bus of the host. When the analog load circuit simulates the load to output current, the voltage detection device can detect the voltage signal of the analog load at the communication circuit, so that the voltage detection device can detect the voltage signal of the analog load without installing the load at the position required to be detected. When the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine to be installed or not through the voltage detection device before the slave machine is installed, so that the installation difficulty is reduced, and resource waste and increase of the installation flow caused by subsequent installation of the repeater are avoided.

In other embodiments, when installing the multi-split air conditioning system, engineering debugging personnel firstly install and configure the air conditioning host and the communication bus, then configure the installation slaves one by one at the required positions, and before installing the slaves, the voltage detection device provided by the invention detects the voltage of the positions of the slaves required to be installed on the communication bus. The voltage detection device is arranged at the position of the slave machine required to be arranged on the communication bus, and the voltage detection device simulates the action of the electronic expansion valve in the slave machine, so that whether the voltage at the position of the communication bus where the voltage detection device is arranged is enough to drive the action of the electronic expansion valve of the slave machine required to be arranged can be detected. If the voltage on the communication bus is detected to be capable of driving the electronic expansion valve in the slave, the slave is installed to a corresponding position, and if the voltage on the communication bus is detected to be insufficient to drive the electronic expansion valve of the slave, a repeater is installed before the slave is installed, so that the voltage at the slave is increased.

According to a third aspect of the present invention, there is provided a voltage detection method for use in the voltage detection device in the air conditioning system according to the second aspect, comprising: outputting a detection inquiry instruction to a host through a communication circuit; receiving a detection instruction sent by a host, and controlling a current source circuit to output a set current; acquiring a bus voltage signal through a voltage acquisition circuit; the voltage state is determined from the bus voltage signal and the set voltage signal.

The voltage detection method provided by the invention is used for detecting the voltage of the air conditioning system in the second aspect, so as to determine whether a repeater needs to be additionally arranged in the air conditioning system. Specifically, the voltage detection method proposed in the fourth aspect of the present invention is used for a voltage detection device provided in an air conditioning system. The voltage detection device can be connected to the position of the communication bus configuration slave, so as to detect the voltage at the position of the communication bus. The specific detection method comprises the following steps:

the control voltage detection device sends a detection inquiry instruction to a host in the air conditioning system through the communication circuit, namely, sends an instruction whether to perform voltage detection or not to the host, and waits for a detection instruction returned by the host. The voltage detection device responds to a detection instruction returned by the host computer to start voltage detection, controls the current source circuit to output set current, acquires a bus voltage signal of the position of the voltage detection device on the communication bus through the voltage acquisition circuit, compares the acquired voltage value of the bus voltage signal with the voltage value of the set voltage signal, and determines the voltage state on the communication bus according to comparison solution, so as to determine whether a repeater is needed to be additionally arranged in the air conditioning system to improve the voltage value on the communication bus. When the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine to be installed or not through the voltage detection device before installing the slave machine or when detecting whether the voltage deficiency exists in the multi-split system after installation is completed, so that the installation difficulty is reduced, and resource waste and increase of an installation flow caused by subsequent installation of the repeater are avoided.

It will be appreciated that the sending of the detection query is configured such that when the voltage detection device is connected to the communication bus, the voltage detection device is sent directly to the host, i.e. the voltage detection device is able to detect whether the voltage detection device is connected in the communication bus, and if so, automatically send a detection query instruction. The voltage detection device is also provided with a function key, and a detection inquiry instruction is sent to the host computer by triggering the corresponding function key.

In addition, the voltage detection method in the technical scheme provided by the invention can also have the following additional technical characteristics:

in one possible design, the step of determining the voltage state according to the bus voltage signal and the set voltage signal specifically includes: determining that the operation requirement of the slave machine is met based on the voltage value of the bus voltage signal being greater than or equal to the voltage value of the set voltage signal; and based on the fact that the voltage value of the bus voltage signal is smaller than the voltage value of the set voltage signal, determining that the operation requirement of the slave is not met, and outputting prompt information.

In the design, whether the voltage value on the communication bus in the air conditioning system meets the operation requirement of the slave machine can be determined through the magnitude relation between the bus voltage signal detected by the voltage acquisition circuit and the voltage value of the set voltage signal.

The host computer can control the opening degree of the electronic expansion valve in the slave computer through the communication bus, so that the set voltage is selected as the driving voltage of the electronic expansion valve, when the voltage value of the bus voltage signal is detected to be smaller than the voltage value of the set voltage signal, the situation that the voltage at the voltage detection device on the communication bus is insufficient to drive the electronic expansion valve of the slave computer is judged, namely the operation requirement of the slave computer is not met is judged, the voltage detection device is also provided with a video output device and/or an audio output device, and the voltage detection device can correspondingly output prompt information through the video output device and/or the audio output device so as to prompt a user that the voltage on the communication bus is insufficient, and a repeater is needed to be additionally arranged on the communication bus. When the voltage value of the bus voltage signal is detected to be larger than the voltage value of the set voltage signal, the voltage at the voltage detection device on the communication bus is judged to be enough to drive the electronic expansion valve of the slave machine, namely the operation requirement of the slave machine is met. By the aid of the judging method, whether the repeater needs to be additionally arranged on the communication bus can be judged rapidly, so that when the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine through the voltage detection device before the slave machine is installed or when the problem of insufficient voltage exists in the multi-split system after installation is detected, installation difficulty is reduced, and resource waste and increase of installation flow caused by subsequent installation of the repeater are avoided.

In one possible design, the detection method further includes: the timing current source circuit outputs the output duration of the set current; and the output time length reaches the set time length, and a detection completion signal is sent to the host in response to a completion inquiry instruction sent by the host.

In this design, the timing is started after the current source circuit outputs the set current, or after the voltage detection device receives the detection signal, to determine the output period. And after the timed output time length reaches the set time length, receiving a completion inquiry command returned by the host, and sending a detection completion signal to the host to complete the step of detecting the voltage on the communication bus.

According to a fourth aspect of the present invention, there is provided a voltage detection method for a host in an air conditioning system according to the second aspect, including: and receiving a detection inquiry command and sending the detection command to the voltage detection device.

The voltage detection method provided by the invention is used for detecting the voltage of the air conditioning system in the second aspect, so as to determine whether a repeater needs to be additionally arranged in the air conditioning system. Specifically, the voltage detection method proposed in the fourth aspect of the present invention is used for a host set in an air conditioning system. The voltage detection device can be connected to the position of the communication bus configuration slave, so as to detect the voltage at the position of the communication bus. The specific detection method comprises the following steps:

After receiving the detection inquiry command sent by the voltage detection device, the host sends a detection command to the voltage detection device so that the voltage detection device starts to detect the voltage value at the voltage detection device.

The voltage detection device responds to a detection instruction sent by the host, starts to detect voltage, controls the current source circuit to output set current, acquires a bus voltage signal of the position of the voltage detection device on the communication bus through the voltage acquisition circuit, compares the acquired voltage value of the bus voltage signal with the voltage value of the set voltage signal, and determines the voltage state on the communication bus according to comparison solution, so as to determine whether a repeater is needed to be additionally arranged in the air conditioning system to improve the voltage value on the communication bus. When the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine to be installed or not through the voltage detection device before installing the slave machine or when detecting whether the voltage deficiency exists in the multi-split system after installation is completed, so that the installation difficulty is reduced, and resource waste and increase of an installation flow caused by subsequent installation of the repeater are avoided.

In one possible design, the voltage detection method further includes: and sending a completion inquiry command to the voltage detection device according to the set period.

In the design, the host sends a completion inquiry command to the voltage detection device according to a set period, so that the voltage detection device can timely transmit a detection completion signal back to the host after detection is completed, and the detection of the voltage on the communication bus is completed rapidly.

According to a fifth aspect of the present invention there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor performs the steps of a voltage detection method as in any of the possible designs described above. Therefore, the voltage detection method has all the beneficial technical effects of any one of the above possible designs, and will not be described in detail herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 shows a circuit diagram of a voltage detection device in a first embodiment of the present invention;

Fig. 2 shows a circuit diagram of a voltage detection device in a second embodiment of the invention;

fig. 3 is a schematic view showing the construction of an air conditioning system in a third embodiment of the present invention;

fig. 4 shows one of flow charts of a voltage detection method in a fourth embodiment of the present invention;

FIG. 5 shows a second flow chart of a voltage detection method according to a fourth embodiment of the invention;

fig. 6 shows a flow chart of a voltage detection method in a fifth embodiment of the invention.

The correspondence between the reference numerals and the component names in fig. 1 to 3 is:

100 voltage detection device, 120 communication circuit, 122 diode, 124 communication element, 140 voltage acquisition circuit, 142 second power supply, 144 second resistive element, 146 third resistive element, 148 capacitor, 160 analog load circuit, 162 current source circuit, 1622 first power supply, 1624 first switching element, 1626 second switching element, 1628 first resistive element, 164 voltage conversion circuit, 200 air conditioning system, 202 host, 204 slave.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

A voltage detecting apparatus, an air conditioning system, a voltage detecting method, and a readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 6.

Embodiment one:

as shown in fig. 1, in a first embodiment of the present invention, a voltage detection device 100 is provided, and is used in a multi-split system, where the voltage detection device 100 is connected to a host in the multi-split system, and includes: a communication circuit 120, a voltage acquisition circuit 140, and an analog load circuit 160. The communication circuit 120 is connected to the host; the voltage acquisition circuit 140 is connected to the communication circuit 120; the analog load circuit 160 is connected to the communication circuit 120, and the analog load circuit 160 is used for simulating the load output action current, so that the voltage acquisition circuit 140 can acquire the bus voltage signal in the state of the load output action current at the communication circuit 120.

In this embodiment, the voltage detection device 100 is configured to detect a voltage on a communication bus in the multi-connected system, and determine whether an additional repeater needs to be disposed on the communication bus of the multi-connected system according to the detection result. The multi-split system comprises a host machine and at least two slave machines connected with the host machine. The voltage detection device 100 is connected to a communication bus of the multi-split system, that is, the voltage detection device 100 is connected to the host in a communication manner.

The voltage detection device 100 includes a communication circuit 120, a voltage acquisition circuit 140, and an analog load circuit 160. The communication circuit 120 is connected with a communication bus in the multi-split system, and the voltage detection device 100 can perform signal interaction with a host through the communication circuit 120. The analog load circuit 160 is capable of simulating the current output by the load to be driven by the communication bus of the host. When the analog load circuit 160 simulates a load output current, the voltage detection device 100 is capable of detecting a voltage signal of the analog load at the communication circuit 120, and the voltage detection device 100 detects the voltage signal by the analog load without installing a load at a position to be detected. When the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine to be installed or not through the voltage detection device 100 before installing the slave machine or when detecting whether the voltage deficiency exists in the multi-split system after installation, so that the installation difficulty is reduced, and the resource waste and the increase of the installation flow caused by the subsequent installation of the repeater are avoided.

In some embodiments, when installing the multi-split air conditioning system 200, engineering debugging personnel firstly installs and configures an air conditioning host and a communication bus, then configures installing slaves one by one at a required position, and before installing the slaves, voltage detection is performed on the position of the slave required to be installed on the communication bus by the voltage detection device 100 provided by the invention. The voltage detection device 100 is installed at the position of the slave machine required to be installed on the communication bus, and the action of the electronic expansion valve in the slave machine is simulated by the voltage detection device 100, so that whether the voltage at the position of the communication bus where the voltage detection device 100 is located is enough to drive the action of the electronic expansion valve of the slave machine required to be installed can be detected. If the voltage on the communication bus is detected to be capable of driving the electronic expansion valve in the slave, the slave is installed to a corresponding position, and if the voltage on the communication bus is detected to be insufficient to drive the electronic expansion valve of the slave, a repeater is installed before the slave is installed, so that the voltage at the slave is increased.

In some embodiments, engineering debugging personnel can detect whether the problem of insufficient communication bus voltage exists in the installed multi-split air conditioning system 200 through the voltage detection device 100 provided by the invention. When a slave in the installed multi-split air conditioning system 200 fails, an engineering debugger can determine whether the air conditioning system 200 needs to be provided with a repeater through the voltage detection device 100.

In these embodiments, the voltage detection device 100 is connected to the furthest end from the host, and the voltage detection device 100 is connected to the last slave location if the communication line is a hand-held connection, and the voltage detection device 100 is connected to the longest branch location if the star connection is a tree connection, and the voltage detection device 100 is connected to the furthest branch from the host.

Embodiment two:

as shown in fig. 2, in a second embodiment of the present invention, a voltage detection device 100 is provided, which is used in a multi-split system, where the voltage detection device 100 is connected to a host in the multi-split system, and includes: a communication circuit 120, a voltage acquisition circuit 140, and an analog load circuit 160. The communication circuit 120 is connected with the host; the voltage acquisition circuit 140 is connected with the communication circuit 120; the analog load circuit 160 is connected to the communication circuit 120, and the analog load circuit 160 is configured to simulate a load output operation current, so that the voltage acquisition circuit 140 can acquire a bus voltage signal in a state of the load output operation current at the communication circuit 120.

As shown in fig. 2, the analog load circuit 160 includes: a current source circuit 162 and a voltage conversion circuit 164. The voltage conversion circuit 164 is connected to the current source circuit 162, and the voltage conversion circuit 164 can convert the voltage of the current source circuit 162 into a load operation voltage.

In this embodiment, the voltage detection apparatus 100 includes a communication circuit 120, a voltage acquisition circuit 140, and an analog load circuit 160. The communication circuit 120 is connected with a communication bus in the multi-split system, and the voltage detection device 100 can perform signal interaction with a host through the communication circuit 120. The analog load circuit 160 is capable of simulating the current output by the load to be driven by the communication bus of the host. When the analog load circuit 160 simulates a load output current, the voltage detection device 100 is capable of detecting a voltage signal of the analog load at the communication circuit 120, and the voltage detection device 100 detects the voltage signal by the analog load without installing a load at a position to be detected. When the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine to be installed or not through the voltage detection device 100 before installing the slave machine or when detecting whether the voltage deficiency exists in the multi-split system after installation, so that the installation difficulty is reduced, and the resource waste and the increase of the installation flow caused by the subsequent installation of the repeater are avoided.

The analog load circuit 160 includes a voltage conversion circuit 164 and a current source circuit 162. The current source circuit 162 is capable of simulating an operation current of a load. One end of the voltage conversion circuit 164 is connected to the current source circuit 162, so that the voltage outputted by the current source circuit can be converted into the action voltage of the load, and the damage of the current source circuit 162 caused by the overlarge voltage inputted to the current source circuit 162 is avoided, and the stability of the current outputted by the current source circuit 162 by simulating the load can be ensured.

It can be appreciated that the voltage detection apparatus 100 is configured to detect a voltage on a communication bus in the multi-connected system, and determine whether an additional repeater needs to be disposed on the communication bus of the multi-connected system according to the detection result. The multi-split system comprises a host machine and at least two slave machines connected with the host machine. The voltage detection device 100 is connected to a communication bus of the multi-split system, that is, the voltage detection device 100 is connected to the host in a communication manner.

In any of the above embodiments, the current source circuit 162 includes: a first power supply 1622, a first switching element 1624, and a second switching element 1626. A first end of the first switching element 1624 is connected to the first power supply 1622, a second end of the first switching element 1624 is grounded, and a control end of the first switching element 1624 is connected to the first end of the first switching element 1624; a first terminal of the second switching element 1626 is connected to the third terminal of the voltage converting circuit 164, a second terminal of the second switching element 1626 is commonly grounded to a fourth terminal of the voltage converting circuit 164, and a control terminal of the second switching element 1626 is connected to a control terminal of the first switching element 1624.

In this embodiment, the current source circuit 162 includes a first power supply 1622, a first switching element 1624, and a second switching element 1626. The first end and the control end of the first switching element 1624 are connected to the first power supply 1622, and the control end of the second switching element 1626 is connected to the control end of the first switching element 1624, so that when the first power supply 1622 outputs a current, the first end and the control end of the first switching element 1624 and the control end of the second switching element 1626 are in a power-on state. The second end of the first switching element 1624 and the second end of the second switching element 1626 are both grounded, and the first end and the second end of the second switching element 1626 are both connected to the voltage conversion module. Thus, the first switching element 1624 and the second switching element 1626 form the mirror current source circuit 162, and the mirror current source circuit 162 can output a constant current, thereby realizing an operation current of the analog load.

By properly arranging the output current of the first power supply 1622 and the voltage conversion circuit 164, the current value output from the current source circuit 162 can be set.

It is understood that the first switching element 1624 and the second switching element 1626 are each selected as a transistor, the base of the transistor is used as the control terminal of the first switching element 1624 and the second switching element 1626, and the collector and the emitter of the transistor are the first terminal and the second terminal of the first switching element 1624 and the second switching element 1626. The base of the triode receives the current signal and makes the collector to emitter of the triode conduct, thereby realizing that the control ends of the first switching element 1624 and the second switching element conduct the current signal, and the first end to the second end of the first switching element 1624 and the second switching element 1626 conduct.

In some embodiments, a first terminal of the voltage conversion circuit 164 is connected to the voltage acquisition circuit 140, a second terminal of the voltage conversion circuit 164 is grounded, a third terminal of the voltage conversion circuit 164 is connected to a first terminal of the second switching element 1626, and a fourth terminal of the voltage conversion circuit 164 is connected to a second terminal of the second switching element 1626.

In any of the above embodiments, the current source circuit 162 further includes: a first resistive element 1628, a first end of the first resistive element 1628 being connected to the first power supply 1622, a second end of the first resistive element 1628 being connected to a first end of the first switching element 1624.

In this embodiment, a first resistive element 1628 is further provided in the current source circuit 162, the first resistive element 1628 is selected as a variable resistor, the current value output from the current source circuit 162 can be directly adjusted by adjusting the resistance value of the variable resistor, and the first resistive element 1628 is hereinafter referred to as a first resistor.

A first terminal of the first resistor is connected to the first power source 1622, and a second terminal of the first resistor is connected to a first terminal of the first switching element 1624. The current output by the first power source 1622 needs to flow through the first resistor before flowing to the position of the first switching element 1624. The voltage of the first power supply 1622 is set to be constant, and the resistance value of the first resistor is adjusted to enable the current source circuit 162 to output a set current value.

In any of the above embodiments, the voltage acquisition circuit 140 includes: a second power source 142, a second resistive element 144, and a third resistive element 146. The first end of the second resistive element 144 is connected to the second power source 142; the first end of the third resistive element 146 is connected to the second end of the second resistive element 144, the second end of the third resistive element 146 is grounded, and the first end of the third resistive element 146 is configured to output a bus voltage signal.

In this embodiment, the voltage acquisition circuit 140 includes a second power supply 142, a second resistive element 144, and a third resistive element 146, each of the second resistive element 144 and the third resistive element 146 being selected as a resistor, the second resistive element 144 being hereinafter referred to as a second resistance, and the third resistive element 146 being referred to as a third resistance.

The first end of the second resistor is connected to the second power supply 142, the second end of the second resistor is connected to the first end of the third circuit, and the second end of the third resistor is grounded, i.e., the second resistor and the third resistor are connected in series with the second power supply 142. And taking the common end between the second resistor and the third resistor as a voltage sampling end. The second resistor and the third resistor form a voltage dividing circuit, and the divided voltage signal can be detected through the voltage sampling end. From the detected voltage signal it can be determined whether there is sufficient voltage on the communication bus to drive the load to be installed.

In any of the above embodiments, the voltage acquisition circuit 140 further includes a capacitor 148, a first terminal of the capacitor 148 is connected to the second power source 142, and a second terminal of the capacitor 148 is grounded.

In this embodiment, the voltage acquisition circuit 140 further includes a capacitor 148, a first end of the capacitor 148 being connected to the second power supply 142, and a second end of the capacitor 148 being grounded. Wherein the first terminal of the capacitor 148 is further coupled to a first terminal of a second resistor in the voltage detection circuit and to a second terminal of the diode 122. The capacitor 148 can filter the voltage signal output by the second power supply 142, so as to improve the accuracy of the voltage acquisition circuit 140 in detecting the voltage value.

In any of the above embodiments, the communication circuit 120 includes: a diode 122 and a communication element 124. The first end of the diode 122 is connected to a second power supply 142; the communication element 124 is coupled to the host via a bus, a first terminal of the communication element 124 is coupled to a second terminal of the diode 122, and a second terminal of the communication element 124 is grounded.

In this embodiment, the communication circuit 120 includes a diode 122 and a communication element 124, where the communication element 124 is selected to be connected to a load in the communication bus, and the voltage detection device 100 is capable of communicating signals with a host through the communication element 124. The communication circuit 120 further includes a diode 122, a first terminal of the diode 122 being connected to the second power supply 142, and a first terminal of the communication element 124 being connected to a second terminal of the diode 122. The diode 122 can limit the flowing direction of the current, so as to avoid the voltage surge caused by the unstable voltage of the second power supply 142 to the communication element 124, and thus avoid the communication element 124 from being damaged by the voltage surge.

In any of the above embodiments, the diode 122 is conductive from the second terminal to the first terminal.

In this embodiment, the first and second ends of the diode 122 are connected to the second power source 142 and the communication element 124, respectively. Diode 122 is configured to conduct from a second end to a first end and to turn off from the first end to the second end, i.e., where current on communication element 124 and the communication bus of the multi-split system can flow through diode 122 to second power source 142. Conversely, current at the location of the second power source 142 cannot flow in a reverse direction through the diode 122 to the location of the communication element 124. The damage of the communication element 124 caused by the voltage surge of the second power supply 142 can be effectively avoided.

Embodiment III:

as shown in fig. 3, in a third embodiment of the present invention, there is provided an air conditioning system 200 including: the master 202, at least two slaves 204 and the voltage detection device 100, the voltage detection device 100 is the voltage detection device 100 in the first or second embodiment. The slave 204 is connected to the master 202, and the voltage detection device 100 is connected to the master 202.

In this embodiment, the air conditioning system 200 is a multi-split air conditioning system 200, where the air conditioning system 200 includes a master 202 and at least two slaves 204, and the at least two slaves 204 are connected to the master 202 through a communication bus. The voltage detection device 100 is also connected to a host 202 in the multi-split air conditioning system 200 through a communication bus.

The voltage detection device 100 includes a communication circuit 120, a voltage acquisition circuit 140, and an analog load circuit 160. The communication circuit 120 is connected to a communication bus in the multi-split system, and the voltage detection device 100 can perform signal interaction with the host 202 through the communication circuit 120. The analog load circuit 160 is capable of simulating the current output by the load to be driven by the communication bus of the host 202. When the analog load circuit 160 simulates a load output current, the voltage detection device 100 is capable of detecting a voltage signal of the analog load at the communication circuit 120, realizing that the voltage detection device 100 detects the voltage signal by the analog load without installing the load at a position to be detected. When the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine 204 or not through the voltage detection device 100 before the slave machine 204 is installed, so that the installation difficulty is reduced, and resource waste and increase of an installation flow caused by subsequent installation of the repeater are avoided.

In some embodiments, engineering debugging personnel can detect whether the problem of insufficient communication bus voltage exists in the installed multi-split air conditioning system 200 through the voltage detection device 100 provided by the invention. When the slave 204 in the installed multi-split air conditioning system 200 fails, an engineering debugger can determine whether the air conditioning system 200 needs to be provided with a repeater through the voltage detection device 100.

In these embodiments, the voltage detection device 100 is connected to the furthest end from the host 202, and the voltage detection device 100 is connected to the last slave 204 if the communication line is a hand-held connection, and the voltage detection device 100 is connected to the longest branch if the star connection is made, and the voltage detection device 100 is connected to the branch furthest from the host 202 if the tree connection is made.

In other embodiments, when installing the multi-split air conditioning system 200, an engineering debugger installs and configures the air conditioning host 202 and the communication bus, then configures the installation slaves 204 one by one at the required positions, and before installing the slaves 204, the voltage detection device 100 provided by the invention detects the voltage at the positions of the slaves 204 required to be installed on the communication bus. The voltage detection device 100 is installed at the position of the communication bus where the slave 204 needs to be installed, and the operation of the electronic expansion valve in the slave 204 is simulated by the voltage detection device 100, so that whether the voltage at the position of the communication bus where the voltage detection device 100 is located is sufficient to drive the operation of the electronic expansion valve in the slave 204 needing to be installed can be detected. If it is detected that the voltage on the communication bus is capable of driving the electronic expansion valve in the slave 204, the slave 204 is installed to the corresponding location, and if it is detected that the voltage on the communication bus is insufficient to drive the electronic expansion valve of the slave 204, a repeater is installed before the slave 204 is installed, thereby increasing the voltage at the slave 204.

Embodiment four:

as shown in fig. 4, a fourth embodiment of the present invention provides a voltage detection method for a voltage detection apparatus 100 in an air conditioning system 200 as in the third embodiment, including:

step 402, outputting a detection inquiry instruction to a host through a communication circuit;

step 404, in response to a detection instruction sent by the host, controlling the current source circuit to output a set current;

step 406, collecting bus voltage signals through a voltage collecting circuit;

step 408, comparing the bus voltage signal with the set voltage signal, and determining the voltage state according to the comparison result.

In this embodiment, the voltage detection method is used to perform voltage detection on the air conditioning system 200 in the third embodiment, so as to determine whether or not a repeater needs to be added to the air conditioning system 200. Specifically, the voltage detection method proposed in the present embodiment is used for the voltage detection device 100 provided in the air conditioning system 200. The voltage detection device 100 can be connected to the communication bus configuration slave 204 at a position thereof, and can detect a voltage at the position of the communication bus. The specific detection method comprises the following steps:

the control voltage detection device 100 sends a detection query command to the host 202 in the air conditioning system 200 through the communication circuit 120, that is, sends a command for whether to perform voltage detection to the host 202, and waits for a detection command returned by the host 202. The voltage detection device 100 starts to perform voltage detection in response to a detection command returned by the host 202, controls the current source circuit 162 to output a set current, collects a bus voltage signal of a position where the voltage detection device 100 is located on the communication bus through the voltage collection circuit 140, compares a voltage value of the collected bus voltage signal with a voltage value of the set voltage signal, and determines a voltage state on the communication bus according to comparison solution, thereby determining whether a repeater needs to be added in the air conditioning system 200 to increase the voltage value on the communication bus. When the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine 204 through the voltage detection device 100 before the slave machine 204 is installed or when the problem of insufficient voltage exists in the multi-split system after the installation is detected, so that the installation difficulty is reduced, and the resource waste and the increase of the installation flow caused by the subsequent installation of the repeater are avoided.

It will be appreciated that the sending of the detection query is configured such that upon connection of the voltage detection device 100 to the communication bus, the voltage detection device 100 sends directly to the host 202, i.e. the voltage detection device 100 is able to detect whether the voltage detection device 100 is connected in the communication bus, and if so, automatically sends a detection query instruction. The voltage detection device 100 is further provided with a function key, and a detection inquiry command is sent to the host 202 by triggering the corresponding function key.

In any of the above embodiments, the step of determining the voltage state according to the bus voltage signal and the set voltage signal specifically includes: when the voltage value of the bus voltage signal is detected to be larger than or equal to the voltage value of the set voltage signal, the bus voltage value is judged to meet the operation requirement of the slave 204, and when the voltage value of the bus voltage signal is detected to be smaller than the voltage value of the set voltage signal, the bus voltage value is judged to be not enough to meet the operation requirement of the slave 204, and prompt information is output.

In this embodiment, the magnitude relationship between the bus voltage signal detected by the voltage acquisition circuit 140 and the voltage value of the set voltage signal can determine whether the voltage value on the communication bus in the air conditioning system 200 meets the operation requirement of the slave 204.

The host 202 can control the opening of the electronic expansion valve in the slave 204 through the communication bus, so that the set voltage is selected as the driving voltage of the electronic expansion valve, when the voltage value of the detected bus voltage signal is smaller than the voltage value of the set voltage signal, it is determined that the voltage at the voltage detection device 100 on the communication bus is insufficient to drive the electronic expansion valve of the slave 204, that is, the operation requirement of the slave 204 is not met, the voltage detection device 100 is further provided with a video output device and/or an audio output device, and the voltage detection device 100 can correspondingly output prompt information through the video output device and/or the audio output device to prompt the user that the voltage on the communication bus is insufficient, and a repeater needs to be additionally arranged on the communication bus. When the voltage value of the bus voltage signal is detected to be larger than the voltage value of the set voltage signal, it is determined that the voltage at the communication bus voltage detection device 100 is sufficient to drive the electronic expansion valve of the slave 204, that is, to meet the operation requirement of the slave 204. By the judging method, whether the repeater needs to be additionally arranged on the communication bus can be rapidly judged, so that when the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave 204 through the voltage detection device 100 before the slave 204 is installed or when the problem of insufficient voltage exists in the multi-split system after the installation is detected, the installation difficulty is reduced, and resource waste and the increase of the installation flow caused by the subsequent installation of the repeater are avoided.

As shown in fig. 5, in any of the foregoing embodiments, the detection method further includes:

step 502, the timing current source circuit outputs the output duration of the set current;

step 504, the output duration reaches the set duration, receives the completion inquiry command sent by the host, and sends a detection completion signal to the host.

In this embodiment, after the current source circuit 162 outputs the set current, the timing is started, or after the voltage detection device 100 receives the detection signal, the timing is started to determine the output period. When the counted output time length reaches the set time length, and the completion inquiry command returned by the host 202 is received, a detection completion signal is sent to the host 202, and the step of detecting the voltage on the communication bus is completed.

Fifth embodiment:

as shown in fig. 6, a fifth embodiment of the present invention provides a voltage detection method for a host 202 in an air conditioning system 200 according to the third embodiment, including:

step 602, receiving a detection inquiry instruction;

step 604, outputting a detection command to the voltage detection device.

In this embodiment, the voltage detection method is used to perform voltage detection on the air conditioning system 200 in the third embodiment, so as to determine whether or not a repeater needs to be added to the air conditioning system 200. Specifically, the voltage detection method proposed in the present embodiment is used for the host 202 provided in the air conditioning system 200. The voltage detection device 100 can be connected to the communication bus configuration slave 204 at a position thereof, and can detect a voltage at the position of the communication bus. The specific detection method comprises the following steps:

After receiving the detection query command sent by the voltage detection device 100, the host 202 sends a detection command to the voltage detection device 100, so that the voltage detection device 100 starts to detect the voltage value at the voltage detection device 100.

The voltage detection device 100 starts to perform voltage detection in response to a detection command sent by the host 202, controls the current source circuit to output a set current, acquires a bus voltage signal of a position where the voltage detection device 100 is located on the communication bus through the voltage acquisition circuit, compares the acquired voltage value of the bus voltage signal with the voltage value of the set voltage signal, and determines a voltage state on the communication bus according to comparison solution, thereby determining whether a repeater needs to be added in the air conditioning system 200 to improve the voltage value on the communication bus. When the multi-split system is configured, engineering debugging personnel can judge whether the repeater needs to be additionally arranged at the position of the slave machine 204 through the voltage detection device 100 before the slave machine 204 is installed or when the problem of insufficient voltage exists in the multi-split system after the installation is detected, so that the installation difficulty is reduced, and the resource waste and the increase of the installation flow caused by the subsequent installation of the repeater are avoided.

In any of the foregoing embodiments, the voltage detection method further includes: a completion inquiry command is sent to the voltage detection device 100 in accordance with the set period.

In this embodiment, the host 202 sends a completion query command to the voltage detection device 100 according to a set period, so that the voltage detection device 100 can timely send a detection completion signal back to the host 202 after the detection is completed, thereby rapidly completing the detection of the voltage on the communication bus.

Example six:

a complete embodiment of the present invention provides a voltage detection method for the host 202 in the air conditioning system 200 as in the third embodiment.

After the air conditioning system 200 is installed, the voltage detection device 100 is connected to the slave 204 on the communication bus furthest from the master 202.

If the communication line between slaves 204 is a hand-held connection, it is connected to the last host 202 location, if it is a star connection, it is connected to the longest branch location, if it is a tree connection, it is connected to the branch furthest from the host 202. The communication circuit 120 in the voltage detection device 100 is the same as the communication circuit 120 of the slave 204, the voltage detection device 100 corresponds to one slave 204, and the address can be set to a specific address, such as 255 or other addresses, when the address is fixed, the other slaves 204 can not use the address any more, so that address repetition is avoided.

The voltage detection device 100 includes a communication bus access port that places the communication element 124 in the endmost access communication bus. The communication element 124 is the communication circuit 120 of the slave 204, the voltage detection device 100 corresponds to the communication between the slave 204 and the master 202, the diode 122 can be turned off reversely, the capacitor 148 filters the power, the second resistor and the third resistor form a voltage division circuit for detecting the bus voltage signal, the voltage conversion circuit can convert the voltage into the working voltage of the electronic expansion valve in the slave 204, the first switching element 1624, the second switching element 1626 and the first resistor form a mirror current source circuit 162, and the working current of the electronic expansion valve in the slave 204 can be simulated.

The host 202 receives the detection query command sent by the voltage detection device 100, the host 202 replies the detection command to the voltage detection device 100, and then the host 202 performs communication data exchange with other slaves 204 normally. Periodically sending a complete inquiry command to the voltage detection device 100 at intervals.

The voltage detection device 100 receives the detection instruction transmitted by the host 202, drives the current source circuit 162 to output a constant current, the current level can be adjusted to 800mA (milliamp) through the first resistor, the action time of the current source circuit 162 can be set to 1 minute, and meanwhile, the voltage detection device 100 displays a word of "in detection" to engineering debugging personnel through a man-machine interaction interface. Meanwhile, the main control chip of the voltage detection device 100 detects the voltage signal divided by the second resistor and the third resistor in real time, calculates the voltage value of the bus voltage signal, and continuously compares the voltage value of the bus voltage signal with the voltage value of the set voltage signal; the set voltage value may be 13V (volts), and if the detected voltage value of the bus voltage signal is continuously smaller than the voltage value of the set voltage signal, it is determined that a repeater needs to be added to the communication bus. If the detected voltage value of the bus voltage signal is continuously equal to or greater than the voltage value of the set voltage signal, it is determined that the repeater is not required to be added. After the detection time is reached, waiting for an inquiry command sent by the host 202, and when the voltage detection device 100 receives the detection command of the host 202, replying a detection completion signal to the host 202, and displaying a detection result through a human-computer interaction interface. And finishing the detection process of whether the repeater needs to be installed.

By arranging the voltage detection device 100 to detect whether the communication bus needs to be increased by the repeater to increase the voltage, engineering debugging personnel can make an accurate judgment when the air conditioning unit is debugged, the installation difficulty of the repeater is prevented from being increased in the later period, the repeater is prevented from being installed in the air conditioning system 200 without installing the repeater, and resource waste and installation flow are caused.

Embodiment seven:

a seventh embodiment of the present invention provides a readable storage medium having a program stored thereon, which when executed by a processor, implements the voltage detection method in any of the above embodiments, thereby having all the advantageous technical effects of the voltage detection method in any of the above embodiments.

Among them, readable storage media such as Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, and the like.

It should be understood that the invention is not limited to the particular arrangements and instrumentality described above and shown in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after appreciating the spirit of the present invention.

It should also be noted that the exemplary embodiments mentioned in this disclosure describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.

In the claims, specification and drawings of the present invention, the term "plurality" means two or more, unless explicitly defined otherwise, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and making the description process easier, and not for the purpose of indicating or implying that the device or element in question must have the particular orientation described, be constructed and operated in the particular orientation, and therefore such description should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly, and may be, for example, a fixed connection between a plurality of objects, a removable connection between a plurality of objects, or an integral connection; the objects may be directly connected to each other or indirectly connected to each other through an intermediate medium. The specific meaning of the terms in the present invention can be understood in detail from the above data by those of ordinary skill in the art.

In the claims, specification, and drawings of the present invention, the descriptions of terms "one embodiment," "some embodiments," "particular embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the claims, specification and drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a voltage detection device for many online systems, voltage detection device (100) with host computer in the many online systems links to each other, its characterized in that includes:

-a communication circuit (120) connected to the host;

a voltage acquisition circuit (140) connected to the communication circuit (120);

the analog load circuit (160) is connected to the communication circuit (120), the analog load circuit (160) is used for simulating a load to output an action current, so that the voltage acquisition circuit (140) can acquire a bus voltage signal in a state that the load at the communication circuit (120) outputs the action current, and whether the voltage value on a communication bus in the multi-split system meets the operation requirement of a slave machine is determined according to the magnitude relation between the bus voltage signal and the voltage value of a set voltage signal;

the analog load circuit (160) includes:

a current source circuit (162);

a voltage conversion circuit (164) connected to the current source circuit (162), the voltage conversion circuit (164) being capable of converting a voltage of the current source circuit (162) into a load operation voltage;

the current source circuit (162) includes:

a first power supply (1622);

a first switching element (1624), a first end of the first switching element (1624) being connected to a first resistive element (1628), a second end of the first switching element (1624) being grounded, a control end of the first switching element (1624) being connected to the first end of the first switching element (1624);

A second switching element (1626), wherein a first end of the second switching element (1626) is connected with a third end of the voltage conversion circuit (164), a second end of the second switching element (1626) is commonly grounded with a fourth end of the voltage conversion circuit (164), and a control end of the second switching element (1626) is connected with a control end of the first switching element (1624);

-a first end of the first resistive element (1628) is connected to the first power supply (1622), and a second end of the first resistive element (1628) is connected to a first end of the first switching element (1624);

the first end of the voltage conversion circuit (164) is connected with the voltage acquisition circuit (140), and the second end of the voltage conversion circuit (164) is grounded.

2. The voltage detection device according to claim 1, wherein the voltage acquisition circuit (140) comprises:

a second power source (142);

-a second resistive element (144), a first end of the second resistive element (144) being connected to the second power source (142);

-a third resistive element (146), a first end of the third resistive element (146) being connected to a second end of the second resistive element (144), a second end of the third resistive element (146) being grounded, a first end of the third resistive element (146) being arranged to output a bus voltage signal.

3. The voltage detection device according to claim 2, wherein the voltage acquisition circuit (140) further comprises:

-a capacitor (148), a first end of the capacitor (148) being connected to the second power supply (142), a second end of the capacitor (148) being grounded.

4. The voltage detection device according to claim 2, wherein the communication circuit (120) comprises:

-a diode (122), a first end of the diode (122) being connected to the second power supply (142);

-a communication element (124) connected to the host computer by a bus, a first end of the communication element (124) being connected to a second end of the diode (122), a second end of the communication element (124) being grounded.

5. The voltage detecting apparatus according to claim 4, wherein,

the diode (122) is conductive from the second terminal to the first terminal.

6. An air conditioning system, comprising:

a host (202);

at least two slaves (204) connected to the master (202);

the voltage detection device (100) according to any of the claims 1 to 5, being connected to the host (202).

7. A voltage detection method for the voltage detection device (100) in the air conditioning system according to claim 6, characterized by comprising:

outputting a detection query instruction to the host (202) through the communication circuit (120);

receiving a detection instruction sent by the host (202), and controlling the current source circuit (162) to output a set current;

acquiring a bus voltage signal through the voltage acquisition circuit (140);

and determining a voltage state according to the bus voltage signal and the set voltage signal.

8. The method of claim 7, wherein the step of determining the voltage state from the bus voltage signal and the set voltage signal comprises:

determining that the operation requirement of the slave (204) is met based on the voltage value of the bus voltage signal being greater than or equal to the voltage value of the set voltage signal;

and based on the fact that the voltage value of the bus voltage signal is smaller than the voltage value of the set voltage signal, determining that the operation requirement of the slave machine (204) is not met, and outputting prompt information.

9. The voltage detection method according to claim 7, further comprising:

Timing an output period of time for the current source circuit (162) to output the set current;

the output time period reaches a set time period, and a detection completion signal is sent to the host (202) in response to a completion inquiry instruction sent by the host (202).

10. A voltage detection method for the host (202) in the air conditioning system according to claim 6, comprising:

and receiving a detection inquiry command and transmitting the detection command to the voltage detection device (100).

11. The voltage detection method according to claim 10, characterized by further comprising:

and sending a completion inquiry command to the voltage detection device (100) according to a set period.

12. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the voltage detection method according to any of claims 7 to 11.