Integrated detection device, control system and air conditioning system

Abstract

The embodiment of the invention provides an integrated detection device, a control system and an air conditioning system. The integrated detection device comprises: a main body provided with a plurality of mutually independent cavities; the plurality of pipe bodies are communicated with the plurality of cavities in a one-to-one correspondence manner, and the plurality of pipe bodies are used for communicating the plurality of to-be-detected fluid pipelines with the corresponding cavities; the plurality of pressure sensitive elements are in one-to-one correspondence with the plurality of cavities, and the pressure sensitive elements are in contact with the to-be-measured fluid in the corresponding cavities and are used for sensing the pressure of the to-be-measured fluid and generating corresponding pressure electric signals; the conditioning module is electrically connected with the multiple pressure sensitive elements and used for processing the pressure electric signals generated by the pressure sensitive elements and outputting multiple detection signals, the multiple detection signals correspond to the multiple pressure sensitive elements in a one-to-one mode, and the detection signals are signals obtained after the pressure electric signals generated by the pressure sensitive elements are processed. According to the integrated detection device, the product cost is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] This disclosure relates to the field of sensing technology, and in particular to an integrated detection device, control system, and air conditioning system. Background Technology

[0002] Air conditioning system control typically requires pressure sensors. These sensors detect the pressure in the system piping and feed it back to the main control board, which then controls the compressor based on the pressure readings. For example, a low-pressure sensor might be installed on the compressor's return pipe, and a high-pressure sensor on the discharge pipe. Each sensor is connected to the main control board via three wires. Since multiple pressure sensors are independent, installing them requires corresponding mounting structures and electrical cabling, as well as appropriate connectors on the main control board. This reduces assembly efficiency and increases the cost of the air conditioning system. Summary of the Invention

[0003] This disclosure provides an integrated detection device, control system, and air conditioning system to solve or alleviate one or more technical problems in the prior art.

[0004] As a first aspect of the present disclosure, the present disclosure provides an integrated detection device, including:

[0005] The main body is equipped with multiple independent cavities;

[0006] Multiple tubes are connected to multiple cavities one by one, and the multiple tubes are used to connect multiple test fluid pipelines to the corresponding cavities;

[0007] Multiple pressure-sensitive elements correspond one-to-one with multiple chambers. The pressure-sensitive elements are in contact with the fluid to be measured in the corresponding chambers to sense the pressure of the fluid to be measured and generate corresponding pressure electrical signals.

[0008] The conditioning module is electrically connected to multiple pressure-sensitive elements to process the pressure electrical signals generated by the pressure-sensitive elements and output multiple detection signals. Each detection signal corresponds to one of the multiple pressure-sensitive elements, and the detection signal is the signal after processing the pressure electrical signals generated by the pressure-sensitive elements.

[0009] In some embodiments, the plurality of cavities include a first cavity and a second cavity, the plurality of tubes include a first tube and a second tube, and the plurality of pressure-sensitive elements include a first pressure-sensitive element and a second pressure-sensitive element.

[0010] The first tube and the second tube are respectively connected to the first cavity and the second cavity;

[0011] The first pressure-sensitive element and the second pressure-sensitive element are in contact with the fluid to be measured in the first cavity and the second cavity, respectively, and generate corresponding first pressure electrical signal and second pressure electrical signal, respectively.

[0012] The conditioning module is electrically connected to the first pressure-sensitive element and the second pressure-sensitive element, respectively, and is used to process the first pressure electrical signal and the second pressure electrical signal, and output the first detection signal and the second detection signal.

[0013] In some embodiments, the conditioning module includes a first conditioning unit, the first conditioning unit includes a first input channel and a second input channel, and a first pressure-sensitive element and a second pressure-sensitive element are electrically connected to the first input channel and the second input channel, respectively.

[0014] In some embodiments, the first conditioning unit includes a first output channel and a second output channel, the first output channel and the second output channel being used to output a first detection signal and a second detection signal, respectively.

[0015] In some embodiments, a first transmission cable is further included, the first transmission cable including a first signal line, a second signal line, a first power line and a second power line, the first signal line and the second signal line being electrically connected to the first output channel and the second output channel respectively, and the first power line and the second power line being electrically connected to the positive and negative power terminals of the first conditioning unit respectively.

[0016] In some embodiments, the first conditioning unit includes a third output channel for alternately outputting a first detection signal and a second detection signal.

[0017] In some embodiments, a first transmission cable is further included, which includes a signal line, a first power line and a second power line. The signal line is electrically connected to the third output channel, and the first power line and the second power line are electrically connected to the positive and negative power terminals of the first conditioning unit, respectively.

[0018] In some embodiments, a communication bus cable is also included, which is used to output a first detection signal and a second detection signal, and to provide power obtained from the outside to the first conditioning unit.

[0019] In some embodiments, the conditioning module includes a second conditioning unit and a third conditioning unit. The second conditioning unit includes a first input channel and a first output channel. A first pressure electrical signal is electrically connected to the first input channel. The first output channel is used to output a first detection signal, which is a signal after processing the first pressure electrical signal.

[0020] The third conditioning unit includes a second input channel and a second output channel. The second pressure electrical signal is electrically connected to the second input channel, and the second output channel is used to output a second detection signal, which is a signal after processing the second pressure electrical signal.

[0021] In some embodiments,

[0022] The integrated detection device also includes a second transmission cable, which includes a first signal line, a second signal line, a first power line, and a second power line. The first signal line and the second signal line are electrically connected to the first output channel and the second output channel, respectively. The first power line is electrically connected to the positive power supply of the second conditioning unit and the third conditioning unit, and the second power line is electrically connected to the negative power supply of the second conditioning unit and the third conditioning unit.

[0023] In some embodiments, the detection range of the first pressure-sensitive element is 0 to 2 MPa; the detection range of the second pressure-sensitive element is 3.5 MPa to 4.5 MPa.

[0024] In some embodiments, multiple cavities are arranged in parallel, and a pressure-sensitive element is installed at the end of the cavity away from the tube, with a sealed connection between the pressure-sensitive element and the cavity; the conditioning module is located on the side of the pressure-sensitive element away from the cavity.

[0025] The integrated detection device also includes a cover that is placed on the main body, and a conditioning module is located between the pressure-sensitive element and the cover.

[0026] In some embodiments, a temperature sensing element is further included, which is electrically connected to the conditioning module. The conditioning module is also used to process the temperature electrical signal generated by the temperature sensing element. The detection signal output by the conditioning module includes a pressure detection signal and a temperature detection signal.

[0027] In some embodiments, the device further includes a temperature detection device, the negative power supply terminal of which is electrically connected to the negative power supply terminal of the conditioning module. The integrated detection device also includes a temperature signal line, which is electrically connected to the signal terminal of the temperature detection device.

[0028] As a second aspect of the present disclosure, the present disclosure provides a control system including the integrated detection device of the present disclosure, and further including a control module electrically connected to the integrated detection device, the control module being used to perform control according to the detection signal output by the integrated detection device.

[0029] In some embodiments, a signal isolation module is also included, which includes an isolation input section and an isolation output section. An integrated detection device is electrically connected to the isolation input section, and the isolation output section is electrically connected to the control module.

[0030] In some embodiments, the detection signal output by the integrated detection device is a digital signal, and the signal isolation module satisfies the following:

[0031] The signal isolation module includes an optocoupler. The detection signal output from the integrated detection device is coupled to the input of the optocoupler. The control module is coupled to the output of the optocoupler. The control module is used to perform control based on the signal obtained from the output of the optocoupler; or...

[0032] The signal isolation module includes a digital isolator, which includes an input section and an output section. The positive and negative power terminals of the input section are coupled to the positive and negative power terminals of the integrated detection device, respectively. The signal terminal of the input section is coupled to the detection signal of the integrated detection device. The positive and negative power terminals and the signal terminal of the output section are all coupled to the control module, which is used to perform control based on the signal obtained from the signal terminal of the output section.

[0033] In some embodiments, the detection signal output by the integrated detection device is an analog signal. The signal isolation module includes an isolation operational amplifier, which includes an input section and an output section. The positive and negative power supply terminals of the input section are respectively coupled to the positive and negative power supply terminals of the integrated detection device. The two signal terminals of the input section are respectively coupled to the detection signal and the negative power supply terminal of the integrated detection device. The positive and negative power supply terminals and the two signal terminals of the output section are all coupled to a control module. The control module is used to perform control based on the signals obtained from the two signal terminals of the output section.

[0034] In some embodiments,

[0035] The control module includes a power socket for receiving power, and the positive and negative terminals of the integrated detection device are coupled to the positive and negative terminals of the power socket, respectively; or,

[0036] The control module includes a power socket for receiving power, and the control system also includes a DC isolated power supply. The two input power pins of the DC isolated power supply are coupled to the two power pins of the power socket, and the two output power pins of the DC isolated power supply are coupled to the positive and negative power terminals of the integrated detection device, respectively.

[0037] The control system also includes a power supply module, which includes a primary winding, a first-stage output winding, and a second-stage output winding. The primary winding of the power supply module is coupled to AC power, and the first-stage output winding of the power supply module is used to supply power to the control module. A capacitor is provided between the first-stage output winding and the primary winding. The second-stage output winding of the power supply module is coupled to the positive and negative terminals of the integrated detection device.

[0038] In some embodiments, the control system further includes a compressor, a first tube in the integrated detection device is connected to the return pipe of the compressor, a second tube in the integrated detection device is connected to the exhaust pipe of the compressor, and the control module is used to control the operation of the compressor according to the detection signal output by the integrated detection device.

[0039] As a third aspect of the present disclosure, the present disclosure provides an air conditioning system that includes the integrated detection device of the present disclosure; or, includes the control system of the present disclosure.

[0040] The technical solution of this disclosure provides an integrated detection device that integrates multiple modules for sensing the pressure of the fluid under test into a single main body. This allows for fluid pressure detection across multiple fluid pipelines, reducing manufacturing costs, saving assembly time, and improving assembly efficiency. When this integrated detection device is applied to an air conditioning system, a single device can perform pressure detection on the compressor's return and exhaust pipes, improving assembly efficiency and reducing the cost of the air conditioning system.

[0041] The above overview is for illustrative purposes only and is not intended to be limiting in any way. Further aspects, embodiments, and features of this disclosure will become readily apparent from the accompanying drawings and the following detailed description, in addition to the illustrative aspects, embodiments, and features described above. Attached Figure Description

[0042] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments according to this disclosure and should not be construed as limiting the scope of this disclosure.

[0043] Figure 1 This is a schematic diagram of the pressure control connection in an air conditioning system.

[0044] Figure 2 This is a schematic diagram of the exploded structure of a pressure sensor;

[0045] Figure 3 This is a picture of a disassembled pressure sensor product.

[0046] Figure 4 This is an exploded view of the integrated detection device in one embodiment of the present disclosure;

[0047] Figure 5 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in one embodiment of this disclosure;

[0048] Figure 6This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure;

[0049] Figure 7 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure;

[0050] Figure 8 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure;

[0051] Figure 9 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure;

[0052] Figure 10 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure;

[0053] Figure 11 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure;

[0054] Figure 12 This is a connection diagram of the control system in another embodiment of the present disclosure;

[0055] Figure 13 This is a connection diagram of the control system in another embodiment of the present disclosure;

[0056] Figure 14 This is a connection diagram of the control system in another embodiment of the present disclosure;

[0057] Figure 15 This is a connection diagram of the control system in another embodiment of the present disclosure;

[0058] Figure 16 This is a schematic diagram of the power supply circuit for the control module and the integrated detection device in one embodiment of the present disclosure;

[0059] Figure 17 This is a schematic diagram of the power supply circuit for the control module and the integrated detection device in another embodiment of this disclosure;

[0060] Figure 18 This is a schematic diagram of the power supply circuit for the control module and the integrated detection device in another embodiment of this disclosure. Detailed Implementation

[0061] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this disclosure, and different embodiments can be combined arbitrarily without conflict. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0062] Figure 1 This is a schematic diagram of the pressure control connection in an air conditioning system. Figure 2 This is an exploded structural diagram of a pressure sensor. Figure 3 This is a picture of a disassembled pressure sensor product. Figure 1 As shown, in an air conditioning system, a low-pressure sensor is typically placed on the compressor's return pipe, and a high-pressure sensor is placed on the compressor's discharge pipe. Both sensors are connected to a control motherboard via three-core cables. The control motherboard may include a printed circuit board and a main control unit (MCU) mounted on the board. The MCU can be a main control chip or a modular circuit. The control motherboard provides DC power to the pressure sensors via cables; the DC power supply can be 5V or 3.3V. The pressure sensors output a pressure detection signal corresponding to the detected pressure. This signal can be an analog signal or a digital signal conforming to a certain protocol, and is provided to the control motherboard. The control motherboard obtains the pressure of the compressor's return and discharge pipes based on the received pressure detection signals and controls the compressor's operating status.

[0063] Pressure sensor and its structure as follows Figure 2 and Figure 3 As shown, the pressure sensor includes a tube, an outer structural component, a sealing ring, a shielding protective metal component, a pressure-sensitive element, and a circuit board. The outer structural component has a cavity, with the tube connected to the cavity. The other end of the tube connects to the pipeline to receive the gas to be measured. The shielding protective metal component ensures electromagnetic compatibility (EMC). The pressure-sensitive element, also called a pressure sensing element, can include microelectromechanical systems (MEMS), ceramics, etc. The circuit board includes a conditioning chip and its peripheral circuitry. Common pressure-sensitive elements include resistive and capacitive types. The pressure-sensitive element converts the pressure in the pipeline into a weak electrical signal, and the conditioning chip processes this weak signal and feeds it back to the control board.

[0064] Typically, before a product leaves the factory, the pressure-sensitive element of each pressure sensor needs to be calibrated and tested, and the corresponding parameters are written into the corresponding conditioning chip. Regarding the shielding protective metal component, some pressure sensors have a shielding protective metal component, while others do not. For example... Figure 2As shown, the outer structural component has a cavity, and the shielding protective metal component is located inside the cavity. The shielding protective metal component is insulated from the outer structural component. Typically, insulating paper is placed between the shielding protective metal component and the outer structural component, or an insulating layer is sprayed onto the inner wall of the outer structural component to achieve insulation between the shielding protective metal component and the outer structural component.

[0065] In pressure sensors with shielded metal components, the positive and negative power terminals on the circuit board are connected to the shielded metal components via capacitors. For pressure sensors without shielded metal components, the positive and negative power terminals on the circuit board are connected to the outer structural component via capacitors. Typically, the outer structural component is connected to the machine structure and then to ground. Therefore, pressure sensors without shielded metal components have lower voltage tolerance and lower cost, while pressure sensors with shielded metal components have higher voltage tolerance and higher cost.

[0066] In related technologies, shielding metal components are incorporated into pressure sensors to improve their voltage withstand capability, resulting in higher costs. Furthermore, the independent assembly of multiple pressure sensors reduces assembly efficiency, increases assembly costs, and consequently raises the overall cost of the air conditioning system.

[0067] To address some issues in the related technologies, this disclosure proposes an integrated detection device, which can also be called an integrated sensor.

[0068] Figure 4 This is an exploded view of the integrated detection device in one embodiment of this disclosure. Figure 4 As shown, the integrated detection device may include a main body 11, multiple tubes 12, multiple pressure-sensitive elements 13, and a conditioning module 14. The main body 11 has multiple independent cavities. Each tube 12 is connected to one of the cavities, and the tubes 12 connect multiple test fluid lines to their corresponding cavities. For example, one end of the first tube 12a is connected to a corresponding cavity, and the other end of the first tube 12a can be connected to the test fluid line. Thus, the first tube 12a can connect the test fluid line to the corresponding cavity, making the fluid pressure inside the cavity the same as the fluid pressure in the test fluid line. The fluid can be a liquid and / or a gas.

[0069] Multiple pressure-sensitive elements 13 correspond one-to-one with multiple chambers, and each pressure-sensitive element 13 is in contact with the fluid to be measured within its corresponding chamber. The pressure-sensitive element 13 senses the pressure of the fluid and generates a corresponding pressure electrical signal. A conditioning module 14 is electrically connected to each of the multiple pressure-sensitive elements. The conditioning module 14 processes the pressure electrical signals generated by the pressure-sensitive elements 13 and outputs multiple detection signals. Each detection signal corresponds one-to-one with a pressure sensing element, and the detection signal is the processed signal after processing the pressure electrical signals generated by the pressure-sensitive elements.

[0070] For example, the integrated detection device is electrically connected to the control module 20. The control module 20 receives the detection signal output by the conditioning module 14 and can obtain the corresponding fluid pressure based on the detection signal.

[0071] The technical solution of this disclosure embodiment features an integrated detection device that integrates multiple modules for sensing the pressure of the fluid under test into a single main body 11. This allows for fluid pressure detection across multiple fluid pipelines, reducing manufacturing costs, saving assembly time, and improving assembly efficiency. When this integrated detection device is applied to an air conditioning system, a single device can perform pressure detection on the compressor's return and exhaust pipes, improving assembly efficiency and reducing the cost of the air conditioning system.

[0072] In one embodiment, such as Figure 4 As shown, multiple cavities are arranged in parallel. A pressure-sensitive element 13 is installed at the end of a cavity furthest from the tube 12. The pressure-sensitive element 13 is sealed to the cavity, thus enclosing it and allowing the fluid within the cavity to act on it, enabling the pressure-sensitive element to sense the fluid pressure. A conditioning module 14 is located on the side of the pressure-sensitive element 13 furthest from the cavity, and a preset gap is provided between the conditioning module 14 and the pressure-sensitive element 13. A sealing ring can be provided between the pressure-sensitive element 13 and the cavity to achieve a sealed connection, or sealant can be provided between the pressure-sensitive element 13 and the cavity to achieve a sealed connection.

[0073] The integrated detection device also includes a cover (not shown in the figure), which is placed on the main body 11. The conditioning module 14 is located between the pressure-sensitive element 13 and the cover. A preset gap is provided between the conditioning module 14 and the pressure-sensitive element 13, and a preset gap is provided between the conditioning module 14 and the cover. The cover can be cylindrical, and an internal space can be formed within the cover, where the conditioning module 14 can be located. The shape of the cover is not limited to cylindrical; other shapes are also possible.

[0074] For example, an insulating material can be filled between the pressure-sensitive element 13 and the conditioning module 14. The insulating material can not only separate the pressure-sensitive element 13 and the conditioning module 14 to maintain a preset gap between them, but also provide insulation protection. The insulating material can be insulating adhesive, etc.

[0075] For example, the structural components in the integrated detection device may be made of aluminum or steel. In related technologies, the main body of pressure sensors is made of copper, which is expensive. The integrated detection device in this disclosure uses aluminum or steel for its structural components, which greatly reduces material costs.

[0076] This integrated detection device, with its multiple parallel chambers, reduces the cross-sectional size of the main body. Using pressure-sensitive elements to seal the other end of the chambers eliminates the need for additional sealing components, simplifying the assembly process and improving efficiency. Positioning the conditioning module 14 on the side of the pressure-sensitive element furthest from the chambers ensures that the cross-sectional size of the integrated sensor is limited by the main body, further guaranteeing a smaller overall size and saving installation space. The cover effectively protects the conditioning module 14.

[0077] In one embodiment, such as Figure 4 As shown, the multiple cavities may include a first cavity and a second cavity. For example, the main body is provided with two independent cavities, namely a first cavity and a second cavity. The shape of the cavity may be cylindrical. Correspondingly, the multiple tubes 12 may include a first tube 12a and a second tube 12b; the multiple pressure-sensitive elements may include a first pressure-sensitive element 13a and a second pressure-sensitive element 13b.

[0078] like Figure 4 As shown, the first tube 12a and the second tube 12b can be connected to the first cavity and the second cavity, respectively. For example, one end of the first tube 12a is connected to the first cavity, and the other end of the first tube 12a is used to connect to a fluid pipeline to be tested; one end of the second tube 12b is connected to the second cavity, and the other end of the second tube 12b is used to connect to another fluid pipeline to be tested. Figure 4 The tubes shown are in the form of straight lines. In other embodiments, the shape of each tube is not limited to a straight line. The shape of the tube can also be arc-shaped or curved. The specific shape of the tube can be set as needed, as long as it can connect the fluid pipeline to be tested with the corresponding cavity.

[0079] The first pressure-sensitive element 13a and the second pressure-sensitive element 13b can respectively contact the fluid to be measured in the first cavity and the second cavity, and respectively generate a first pressure electrical signal and a second pressure electrical signal. For example, the first pressure-sensitive element 13a contacts the fluid to be measured in the first cavity, senses the pressure of the fluid to be measured, and generates a first pressure electrical signal; the second pressure-sensitive element 13b contacts the fluid to be measured in the second cavity, senses the pressure of the fluid to be measured, and generates a second pressure electrical signal.

[0080] For example, the detection range of the first pressure-sensitive element 13a is 0–2 MPa; the detection range of the second pressure-sensitive element 13b is 3.5 MPa–4.5 MPa. With this configuration, the detection range of the first pressure-sensitive element 13a is adapted to the gas pressure range in the return pipe of the air conditioning system, and can be used to detect the fluid pressure in the return pipe; the detection range of the second pressure-sensitive element 13b is adapted to the gas pressure range in the exhaust pipe of the air conditioning system, and can be used to detect the fluid pressure in the exhaust pipe. Therefore, this integrated detection device can perform pressure detection on the compressor's return and exhaust pipes, improving the assembly efficiency of the air conditioning system and reducing its cost.

[0081] It should be noted that the detection range of the first pressure-sensitive element 13a and the second pressure-sensitive element 13b can be set as needed for application in other situations.

[0082] Pressure-sensitive elements can include microelectromechanical systems (MEMS) and pressure-sensitive materials. Types of pressure-sensitive elements can include resistive, capacitive, fiber optic, resonant, or piezoelectric types. These elements convert pressure in a pipeline into a weak electrical signal. The pressure-sensitive materials in these elements can be semiconductors, ceramics, or metals.

[0083] The conditioning module 14 is electrically connected to the first pressure-sensitive element 13a and the second pressure-sensitive element 13b, respectively, and is used to process the first and second pressure electrical signals and output the processed signals. The conditioning module 14 can amplify and filter the first and second pressure electrical signals to improve the strength of the output detection signal and increase detection accuracy. For example, the first pressure-sensitive element 13a is electrically connected to the conditioning module 14 and transmits the first pressure electrical signal to the conditioning module 14; the second pressure-sensitive element 13b is electrically connected to the conditioning module 14 and transmits the second pressure electrical signal to the conditioning module 14. The conditioning module 14 processes the received first and second pressure electrical signals and outputs a first detection signal and a second detection signal. The first detection signal is the signal after processing the first pressure electrical signal. The second detection signal is the signal after processing the second pressure electrical signal.

[0084] The integrated detection device is configured to integrate two chambers, two tubes, and two pressure-sensitive elements, enabling it to detect two different fluid pipelines.

[0085] It should be noted that, in the specific embodiments described herein, an integrated detection device is used as an example, which integrates two cavities, two tubes, and two pressure-sensitive elements, and can detect two fluid pipelines to be tested. It is understood that the integrated detection device disclosed herein is not limited to detecting two fluid pipelines to be tested. Those skilled in the art can, based on the inventive concept of this disclosure, configure the integrated detection device to integrate more cavities, tubes, and pressure-sensitive elements, thereby enabling the detection of more fluid pipelines to be tested.

[0086] Figure 5 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in one embodiment of this disclosure. The control system may include the integrated detection device in this embodiment, and also includes a control module 20, with the integrated detection device 10 electrically connected to the control module 20. The control module 20 can control the device based on the detection signal output by the integrated detection device 10. In one embodiment, the conditioning module 14 in the integrated detection device may include a first conditioning unit 14a, such as... Figure 5As shown, the first conditioning unit 14a may include a first input channel and a second input channel. A first pressure-sensitive element 13a and a second pressure-sensitive element 13b are electrically connected to the first input channel and the second input channel, respectively. For example, the first pressure-sensitive element 13a is connected to the first input channel, so that the first pressure signal generated by the first pressure-sensitive element 13a can be transmitted to the first conditioning unit 14a through the first input channel, so that the conditioning module 14 can process the first pressure signal. The second pressure-sensitive element 13b is connected to the second input channel, so that the second pressure signal generated by the second pressure-sensitive element 13b can be transmitted to the first conditioning unit 14a through the second input channel, so that the conditioning module 14 can process the second pressure signal.

[0087] For example, the first conditioning unit 14a may include a conditioning chip, and the conditioning module 14 may also include a first printed circuit board (PCB1), on which the conditioning chip may be disposed. When the first conditioning unit 14a includes a conditioning chip, the conditioning module 14 may also include peripheral circuitry disposed on the first printed circuit board. In another embodiment, the first conditioning unit 14a may be a conditioning circuit with conditioning function disposed on the first printed circuit board.

[0088] The number of connection ports for the first and second input channels can be set as needed. Figure 5 In this embodiment, the first pressure-sensitive element 13a or the second pressure-sensitive element 13b is electrically connected to the first conditioning unit 14a via 3 or 4 connecting wires. Therefore, the number of connection ports for the first input channel and the second input channel is 3 or 4. In a specific embodiment, the number of connecting wires between the pressure-sensitive element and the first conditioning unit 14a can be determined according to the type of pressure-sensitive element (e.g., resistive, capacitive, etc.), thereby determining the number of connection ports for the first input channel and the second input channel. For example, when the pressure-sensitive element is capacitive, the number of connection ports for the first input channel and the second input channel is 3, and the number of connecting wires between the pressure-sensitive element and the first conditioning unit 14a is 3.

[0089] In one embodiment, the first pressure-sensitive element 13a and the second pressure-sensitive element 13b are symmetrically arranged with respect to the first conditioning unit 14a. When the first pressure-sensitive element and the second pressure-sensitive element 13b use the same first conditioning unit 14a, symmetrically arranging the first pressure-sensitive element 13a and the second pressure-sensitive element 13b with respect to the first conditioning unit 14a can further reduce the distance between each pressure-sensitive element and the first conditioning unit 14a, improve signal transmission performance, and improve the accuracy of the detection signal.

[0090] like Figure 5As shown, the first conditioning unit 14a includes a first output channel OUT1 and a second output channel OUT2. The first output channel OUT1 and the second output channel OUT2 are used to output a first detection signal and a second detection signal, respectively. For example, the first conditioning unit 14a is a conditioning chip with a first output pin and a second output pin, which are the first output channel OUT1 and the second output channel OUT2. The first detection signal is the signal after processing the first pressure electrical signal. The second detection signal is the signal after processing the second pressure electrical signal. In this way, the conditioning module 14 processes the first and second pressure electrical signals respectively and outputs the first detection signal and the second detection signal from the first output channel OUT1 and the second output channel OUT2, simplifying the signal processing logic of the conditioning module 14.

[0091] like Figure 5 As shown, since the first detection signal and the second detection signal are output separately, the first detection signal can be an analog signal or a digital signal, and the second detection signal can be an analog signal or a digital signal.

[0092] To facilitate signal transmission in the integrated detection device, the integrated detection device may also include a first transmission cable. The first transmission cable may include a first signal line, a second signal line, a first power line, and a second power line. The first signal line and the second signal line may be electrically connected to the first output channel OUT1 and the second output channel OUT2, respectively, so that the first detection signal and the second detection signal can be transmitted to the control module 20 through the first signal line and the second signal line. The first power line and the second power line may be connected to the positive power terminal P+ and the negative power terminal P- of the first conditioning unit 14a, respectively, so that operating power can be provided to the conditioning module 14a through the first power line and the second power line.

[0093] For example, the first printed circuit board of the conditioning module 14 can be equipped with four connection pins, which can be electrically connected to the first output channel OUT1, the second output channel OUT2, the positive power supply P+, and the negative power supply P-, respectively. The four wires of the first transmission cable can be connected to the four connection pins, thus the integrated detection device can be connected to the control module 20 via a single first transmission cable. Correspondingly, the control module 20 only needs one socket for connecting the first transmission cable.

[0094] Therefore, the embodiments disclosed herein can reduce the number of transmission cables, further reduce the cost of integrated testing devices, and improve assembly efficiency.

[0095] Figure 6 This is a schematic diagram illustrating the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure. Figure 6In this embodiment, in the integrated detection device 10, the first pressure-sensitive element 13a and the second pressure-sensitive element 13b are electrically connected to the first input channel and the second input channel of the first conditioning unit 14a, respectively. The first conditioning unit 14a includes a third output channel OUT3, which is used to alternately output a first detection signal and a second detection signal. The first detection signal is a signal obtained by processing the first pressure electrical signal, and the second detection signal is a signal obtained by processing the second pressure electrical signal.

[0096] In this embodiment, a third output channel is used to output the first detection signal and the second detection signal. To facilitate the output of the detection signals, the third output channel outputs the first detection signal and the second detection signal alternately. "Alternately" can be understood as "intermittently," "periodically," or "at different preset times." For example, the third output channel outputs the first detection signal and the second detection signal alternately; or, the third output channel outputs the first detection signal and the second detection signal periodically; or, the third output channel outputs the first detection signal at a first preset time and the second detection signal at a second preset time.

[0097] To distinguish whether the signal output by the third output channel OUT3 is the first detection signal or the second detection signal, odd-numbered frames of data output by the third output channel OUT3 can be set as the first detection signal, and even-numbered frames as the second detection signal. Alternatively, different flag values ​​can be set for the data output by the third output channel OUT3. When the flag value is the first flag value, the signal output by the third output channel OUT3 is the first detection signal; when the flag value is the second flag value, the signal output by the third output channel OUT3 is the second detection signal. In this embodiment, the signal output by the third output channel OUT3 is a digital signal.

[0098] like Figure 6 As shown, the integrated detection device may further include a first transmission cable (Cable1), which includes a signal line, a first power line, and a second power line. The signal line is electrically connected to the third output channel OUT3, and the first and second power lines are electrically connected to the positive (P+) and negative (P-) power terminals of the first conditioning unit 14a, respectively. Thus, the first and second detection signals can be transmitted to the control module 20 via the signal line, and operating power can be provided to the conditioning module 14a via the first and second power lines. This method, compared to... Figure 5 In this embodiment, the number of core wires in the first transmission cable is reduced, further lowering product costs.

[0099] Figure 7 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure. Figure 7As shown, the integrated detection device may further include a communication bus cable. The communication bus cable is used to output a first detection signal and a second detection signal, and also to provide power from an external source to the first conditioning unit 14a. For example, LIN bus technology can be used. The communication bus cable only requires two wires, further reducing costs. In this way, using communication bus technology, only a two-wire cable is needed, which can not only transmit power but also transmit detection signals, further reducing costs. Exemplarily, LIN bus technology can be used; in other embodiments, other types of bus technologies can also be used, and it is not limited to LIN bus.

[0100] Figure 8 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure. Figure 9 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure. In one embodiment, such as Figure 8 and Figure 9 As shown, the conditioning module 14 may include multiple conditioning units, the number of which may be the same as the number of pressure-sensitive elements, with each pressure-sensitive element corresponding to a conditioning unit. Each conditioning unit has an input channel and an output channel. The pressure-sensitive element is electrically connected to the input channel of the corresponding conditioning unit, and the output channel of the conditioning unit outputs a detection signal corresponding to the pressure-sensitive element.

[0101] For example, such as Figure 8 and Figure 9 As shown, the conditioning module 14 may include two conditioning units, namely a second conditioning unit 14b and a third conditioning unit 14c. The second conditioning unit 14b includes a first input channel and a first output channel OUT1. The first pressure electrical signal is electrically connected to the first input channel, that is, the first pressure electrical signal generated by the first pressure sensing element 13a is electrically connected to the first input channel. The first output channel OUT1 is used to output a first detection signal, which is a signal after processing the first pressure electrical signal.

[0102] The third conditioning unit 14c includes a second input channel and a second output channel OUT2. The second pressure electrical signal is electrically connected to the second input channel, that is, the second pressure electrical signal generated by the second pressure sensing element 13b is electrically connected to the second input channel. The second output channel OUT2 is used to output a second detection signal, which is a signal after processing the second pressure electrical signal.

[0103] In this approach, two pressure-sensitive elements correspond to two conditioning units. Each conditioning unit only needs to process the pressure electrical signal generated by the corresponding pressure-sensitive element and output a detection signal. There will be no mutual interference between the two conditioning units. Although the number of conditioning units is increased, the internal processing flow of the conditioning units is simplified, which is conducive to improving detection accuracy.

[0104] For example, when there are multiple conditioning units, each conditioning unit can be associated with a transmission cable, which can avoid mutual interference between the detection signals output by different conditioning units.

[0105] For example, such as Figure 8 As shown, the integrated detection device also includes a third transmission cable (Cable 3) and a fourth transmission cable (Cable 4). Both the third and fourth transmission cables (Cable 3 and Cable 4) include a signal line, a first power line, and a second power line. The signal line, first power line, and second power line of the third transmission cable are electrically connected to the first output channel OUT1, the positive power terminal, and the negative power terminal of the second conditioning unit 14b, respectively. The signal line, first power line, and second power line of the third transmission cable are electrically connected to the second output channel OUT2, the positive power terminal, and the negative power terminal of the third conditioning unit 14c, respectively. In other words, each conditioning unit is connected to one transmission cable, which avoids mutual interference between different detection signals and further improves detection accuracy.

[0106] In another embodiment, multiple conditioning units can utilize a single transmission cable, thereby reducing the number of transmission cables and lowering costs. For example, as Figure 9 As shown, the integrated detection device also includes a second transmission cable, Cable 2, which includes a first signal line, a second signal line, a first power line, and a second power line. The first signal line and the second signal line are electrically connected to the first output channel OUT1 and the second output channel OUT2, respectively. The first power line is electrically connected to the positive terminals of the power supplies of the second conditioning unit 14b and the third conditioning unit 14c, and the second power line is electrically connected to the negative terminals of the power supplies of the second conditioning unit 14b and the third conditioning unit 14c.

[0107] The output channels of multiple conditioning units are connected to multiple signal lines. The positive terminals of the power supplies of multiple conditioning units can be connected to the same first power line; for example, the first power line is electrically connected to the positive terminals of the power supplies of the second conditioning unit 14b and the third conditioning unit 14c. Similarly, the negative terminals of the power supplies of multiple conditioning units can be connected to the same second power line; for example, the second power line is electrically connected to the negative terminals of the power supplies of the second conditioning unit 14b and the third conditioning unit 14c. This approach not only reduces interference between the detection signals output from different conditioning units, but also reduces the number of core wires in the cable by sharing the power supply lines, thus lowering costs. For example, Figure 9 The second transmission cable in this embodiment only requires 4 core wires.

[0108] For the second transmission cable, Cable2, a shielded cable can be selected to further reduce external interference to the detection signals transmitted within the cable and improve the signal transmission performance of the cable.

[0109] In one embodiment, a connector can be provided on a first printed circuit board where the conditioning unit is located. Multiple pins in the connector are connected to the output channel of the conditioning unit and the positive and negative terminals of the power supply, respectively, via core wires in a transmission cable. Thus, the transmission cable connects the integrated detection device to the conditioning unit.

[0110] In another embodiment, such as Figure 4 As shown, the integrated testing device may further include a connector that is plugged into the first printed circuit board. The connector has multiple pins that can be connected to the output channel of the conditioning unit, as well as the positive and negative terminals of the power supply. The core wires in the transmission cable can be soldered to the multiple pins of the connector.

[0111] To facilitate the extension of the transmission cable, a wire-through hole can be provided on the cover of the integrated detection device for the transmission cable to extend.

[0112] Figure 10 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure. Figure 11 This is a schematic diagram of the electrical connection between the integrated detection device and the control module in another embodiment of this disclosure. In one embodiment, such as Figure 10 As shown, the integrated detection device may further include a temperature sensing element, which can be electrically connected to the conditioning module 14. The conditioning module 14 is also used to process the temperature electrical signal generated by the temperature sensing element. The detection signals output by the conditioning module 14 include pressure detection signals and temperature detection signals.

[0113] For example, the first detection signal and the second detection signal mentioned above can be pressure detection signals that reflect fluid pressure, and the detection signal output by the conditioning module 14 that corresponds to the temperature electrical signal can be called the temperature detection signal, which is used to reflect the temperature.

[0114] The specific number of temperature sensing elements can be set as needed; there can be one or more.

[0115] The conditioning module 14 can output pressure and temperature detection signals through a single output channel. Both pressure and temperature detection signals are digital signals. The output channel of the conditioning module 14 can sequentially output multiple pressure and multiple temperature detection signals. For example, each pressure and temperature detection signal is configured with a corresponding flag value. Based on the flag value, it can be determined whether the detection signal is a pressure or temperature detection signal, and which pressure-sensitive element or temperature-sensing element the detection signal corresponds to. In this way, the integrated detection device only needs to use a three-core transmission cable, reducing costs.

[0116] In another embodiment, such as Figure 11 As shown, the integrated detection device may also include a temperature sensor, the negative power supply terminal of which is electrically connected to the negative power supply terminal of the conditioning module 14. The integrated detection device also includes a temperature signal line, which is electrically connected to the signal terminal of the temperature sensor.

[0117] Connecting the negative power supply terminal of the temperature sensor to the negative power supply terminal of the conditioning module 14 can save a power cable and reduce costs.

[0118] The temperature-sensitive element can be any commonly used temperature-sensing element, and no specific limitation is made here. The temperature sensor can be any commonly used temperature detection device, and no specific limitation is made here.

[0119] In other embodiments, the integrated detection device may also integrate other types of sensors, which can be configured as needed.

[0120] The integrated testing device of this disclosure integrates multiple modules for sensing the pressure of the fluid under test into a single main body. This allows for fluid pressure testing of multiple fluid pipelines, reducing manufacturing costs, saving assembly time, and improving assembly efficiency. When applied to an air conditioning system, this integrated testing device can perform pressure testing on both the compressor's return and exhaust pipes, improving assembly efficiency and reducing the cost of the air conditioning system.

[0121] refer to Figures 5-11 The integrated detection device can be connected to the control module 20. The control module 20 may include a second printed circuit board and a main control unit (MCU) mounted on the second printed circuit board. The integrated detection device is connected to the main control unit. The control module 20 can determine the corresponding fluid pressure based on the detection signal output by the integrated detection device. For example, the control module 20 can determine the fluid pressure of a corresponding pipeline based on a first detection signal and a second detection signal, and then control relevant components such as compressors or valves.

[0122] This disclosure also provides a control system, with reference to... Figures 5-11 The control system may include the integrated detection device according to embodiments of this disclosure, and may also include a control module 20, wherein the integrated detection device is electrically connected to the control module 20. The control module 20 is used to perform control based on the detection signal output by the integrated detection device. (See reference...) Figure 5 The control module 20 can determine the fluid pressure of a corresponding pipeline based on the first detection signal output by the integrated detection device, and control the operating status of related components such as compressors or valves. The control module 20 can also determine the fluid pressure of another corresponding pipeline based on the second detection signal output by the integrated detection device, and control the operating status of related components such as compressors or valves.

[0123] refer to Figure 10 and Figure 11 The control module 20 can also determine the temperature detected by the temperature sensing element based on the temperature detection signal output by the integrated detection device, or the control module 20 can determine the temperature detected by the temperature detection device based on the signal received from the temperature signal line, thereby controlling the temperature.

[0124] Figure 12 This is a connection diagram of the control system in another embodiment of the present disclosure. In one embodiment, the control system may further include a signal isolation module 30, which includes an isolation input section and an isolation output section. The integrated detection device 10 is electrically connected to the isolation input section, and the isolation output section is electrically connected to the control module 20.

[0125] In related technologies, refer to Figure 2 The use of shielded metal components for EMC protection results in a complex sensor structure and high cost.

[0126] In this embodiment of the present disclosure, a signal isolation module 30 is provided in the control system. The integrated detection device 10 is electrically connected to the isolation input section of the signal isolation module 30, and the control module 20 is electrically connected to the isolation output section of the signal isolation module 30. Thus, the detection signal output by the integrated detection device 10 can be isolated from the control module 20 through the signal isolation module 30, thereby realizing EMC protection of the integrated detection device. The cost of using the signal isolation module is far lower than the cost of using shielded protective metal parts in related technologies. Therefore, the control system in this embodiment of the present disclosure not only achieves EMC isolation but also reduces costs.

[0127] For example, the control module 20 may include a second printed circuit board and a main control unit (MCU) disposed on the second printed circuit board. The main control unit may include a main control chip. The signal isolation module may include a signal isolation circuit or an isolation device. The signal isolation module can be disposed on the second printed circuit board, thereby eliminating the need to fabricate a separate printed circuit board for the signal isolation module, reducing the number of parts in the control system and improving assembly efficiency.

[0128] Figure 13 This is a schematic diagram of the connection of the control system in another embodiment of the present disclosure. Exemplarily, the detection signal output by the integrated detection device is a digital signal. The signal isolation module may include an optocoupler, the detection signal output by the integrated detection device is coupled to the input of the optocoupler, and the control module 20 is coupled to the output of the optocoupler. The control module 20 is used to perform control based on the signal obtained from the output of the optocoupler; for example, the control module 20 controls related components based on the signal obtained from the output of the optocoupler.

[0129] For example, the detection signal output by the integrated detection device can be coupled to the input of the optocoupler through a first signal processing circuit. The first signal processing circuit can filter and amplify the detection signal output by the integrated detection device, processing it into a control signal that matches the input of the optocoupler. When the control signal controls the optocoupler to operate, an output signal can be obtained from the output of the optocoupler. The output of the optocoupler can be coupled to the control module 20 through a second signal processing circuit. The second signal processing circuit processes the signal output from the optocoupler, processing it into a signal that can be received and recognized by the control module 20. The control module 20 controls relevant components, such as compressors or valves, based on the signal obtained from the second signal processing circuit.

[0130] The specific form and structure of the first signal processing circuit and the second signal processing circuit can be set as needed, and are not specifically limited here.

[0131] It should be noted that, Figure 13 The diagram shows an output channel for outputting a detection signal in an integrated detection device. The integrated detection device can employ... Figures 5-11 Any one of the following. When the integrated detection device has multiple output channels, each output channel can be connected to the control module 20 through an optocoupler to achieve signal isolation.

[0132] Figure 14 This is a schematic diagram of the connection of the control system in another embodiment of this disclosure. Exemplarily, the detection signal output by the integrated detection device is a digital signal. The signal isolation module may include a digital isolator. The digital isolator includes an input section and an output section. For example... Figure 14 As shown, the positive power supply VCC1 and negative power supply GND1 of the input section are coupled to the positive power supply VCC and negative power supply GND of the integrated detection device, respectively. The signal terminal of the input section is coupled to the detection signal of the integrated detection device. The positive power supply VCC2, negative power supply GND2, and signal terminal of the output section are all coupled to the control module 20. The control module 20 is used to perform control based on the signal obtained from the signal terminal of the output section. The positive power supply VCC2 and negative power supply GND2 of the output section can be connected to the positive power supply VCC and negative power supply GND of the control module 20, respectively.

[0133] For example, such as Figure 14 As shown, a resistor R1 can be installed between the detection signal and the signal terminal of the input section of the integrated detection device, and a first capacitor C1 can be installed between the signal terminal of the input section and the negative power supply GND1. The values ​​of resistor R1 and capacitor C1 can be set as needed. A resistor R2 can be installed between the signal terminal of the output section of the digital isolator and the control module 20, and a second capacitor C2 can be installed between the signal terminal and the negative power supply GND2. The values ​​of resistor R2 and capacitor C2 can be set as needed.

[0134] Figure 15 This is a schematic diagram of the connection of the control system in another embodiment of this disclosure. The detection signal output by the integrated detection device can be an analog signal. The signal isolation module may include an isolation operational amplifier. The isolation operational amplifier includes an input section and an output section. (Reference) Figure 15 The positive power supply VCC1 and negative power supply GND1 of the input section of the isolation operational amplifier are coupled to the positive power supply VCC and negative power supply GND of the integrated detection device, respectively. The two signal terminals of the input section are coupled to the detection signal of the integrated detection device and the negative power supply GND, respectively. The positive power supply, negative power supply, and two signal terminals of the output section of the isolation operational amplifier are all coupled to the control module 20. The control module 20 is used to perform control based on the signals obtained from the two signal terminals of the output section.

[0135] For example, the two signal terminals of the input section of the isolation operational amplifier are coupled to the detection signal and the negative power supply GND of the integrated detection device through a third signal processing circuit. Thus, the detection signal output by the integrated detection device is processed by the third signal processing circuit and transmitted to the two signal terminals of the input section of the isolation operational amplifier. The signals output from the two signal terminals of the output section of the isolation operational amplifier are transmitted to the control module 20 after passing through a fourth signal processing circuit. The control module 20 controls components such as compressors or valves based on the signals obtained from the two signal terminals of the output section of the isolation operational amplifier. The third signal processing circuit can process the detection signal output by the integrated detection device into a signal compatible with the isolation operational amplifier. The fourth signal processing circuit can process the signal output from the output section of the isolation operational amplifier into a signal that can be received and recognized by the control module 20.

[0136] The specific form and structure of the third and fourth signal processing circuits can be set as needed, and no specific limitations are made here.

[0137] Typically, reference Figures 5-11 The power supply required by the conditioning module 14 in the integrated detection device can be provided directly by an external power source or through the control module 20.

[0138] Figure 16 This is a schematic diagram of the power supply circuit for the control module and the integrated detection device in one embodiment of this disclosure. Exemplarily, the control module 20 and the integrated detection device can use the same power supply. For example, the control module 20 may include a power socket for receiving the power supply, and the positive and negative terminals of the integrated detection device are coupled to the positive and negative terminals of the power socket, respectively, thus the integrated detection device and the control module 20 use the same power supply. The control system may also include a power module, which can be a switching power supply, such as... Figure 16 As shown, a switching power supply can convert alternating current (AC) to direct current (DC). The switching power supply includes an AC input terminal and a DC output terminal. AC power is connected to the AC input terminal, providing AC power to the switching power supply. Internally, the switching power supply converts the AC power to DC power and provides this DC power to the control module 20 and the integrated detection device. Inside the switching power supply, the AC power passes through a filter circuit and a rectifier circuit before being connected to the primary winding S1. There is no electrical connection between the primary winding S1 and the output winding S2.

[0139] Figure 17 This is a schematic diagram of the power supply circuit for the control module and integrated detection device in another embodiment of this disclosure. In one embodiment, the control module 20 includes a power socket for receiving power, so that the power supply module can supply power to the power socket for use by the control module 20. The power supply module may include a switching power supply, such as... Figure 17As shown, the switching power supply includes an AC input terminal and a DC output terminal. AC power is connected to the AC input terminal to supply AC power. Internally, the switching power supply converts the AC power into DC power and supplies this DC power to the control module 20. Typically, to ensure the switching power supply passes EMC testing, a third capacitor C3 can be placed between the primary winding S1 and the output winding S2 inside the switching power supply; alternatively, a resistor R3 and a fourth capacitor C4 can be placed between the primary winding S1 and the output winding S2. If the DC power output from the output winding S2 of the switching power supply is directly supplied to the integrated detection device, it will cause a decrease in the voltage withstand capability of the integrated detection device, making it unable to meet safety regulations.

[0140] To meet safety regulations, the control system may also include a DC isolated power supply, such as... Figure 17 As shown, the two input power pins of the DC-isolated power supply are coupled to the two power pins of the power socket of the control module 20, and the two output power pins of the DC-isolated power supply are coupled to the positive and negative power terminals of the integrated detection device 14, respectively. Exemplarily, the DC-isolated power supply includes an input winding S3 and an output winding S4. The two ends of the input winding S3 are coupled to the two power pins of the power socket of the control module 20, and the output winding S4 is used to supply power to the integrated detection device. The two ends of the output winding S4 can be coupled to the positive and negative power terminals of the integrated detection device conditioning module 14 to supply power to the conditioning module 14. This power supply method is equivalent to setting up a shielding protective metal component in the integrated detection device, improving the voltage withstand performance and EMC performance of the integrated detection device, and is also lower in cost compared to related technologies.

[0141] Figure 18 This is a schematic diagram of the power supply circuit for the control module and integrated detection device in another embodiment of this disclosure. In one embodiment, such as... Figure 18 As shown, the control system includes a power supply module, which includes a switching power supply. The switching power supply includes a primary winding S1, a first-stage output winding S2, and a second-stage output winding S3. The primary winding S1 is coupled to AC power. The first-stage output winding S2 of the power supply module outputs a first DC power supply, which powers the control module 20. To ensure the switching power supply passes EMC testing, a third capacitor C3 can be placed between the primary winding S1 and the first-stage output winding S2, or a resistor R3 and a fourth capacitor C4 can be placed between them. The second-stage output winding S3 of the power supply module is coupled to the positive and negative terminals of the integrated detection device's power supply, providing a second DC power supply to the integrated detection device.

[0142] refer to Figures 16-18Inside the switching power supply, AC power is connected to the primary winding S1 through a filter circuit and a rectifier circuit. The various circuits inside the switching power supply can adopt conventional technologies in this field, and no specific limitations are made here.

[0143] The control system may also include a compressor. The first pipe in the integrated detection device can be connected to the compressor's return pipe, and the second pipe can be connected to the compressor's exhaust pipe. The control module controls the compressor's operation based on detection signals (e.g., a first detection signal and a second detection signal) output by the integrated detection device. The control module can obtain the air pressure in the compressor's return pipe and the exhaust pipe based on the first and second detection signals, and thus control the compressor's operation according to the air pressure.

[0144] This disclosure also provides an air conditioning system, including the integrated detection device described in this disclosure, or including the control system described in this disclosure.

[0145] The air conditioning system adopts the integrated detection device of this disclosure embodiment. One integrated detection device can simultaneously detect the air pressure of the compressor return pipe and exhaust pipe, which reduces the number of pressure sensors used, reduces the assembly steps of the entire system, improves assembly efficiency, and reduces costs.

[0146] In the description of this specification, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0147] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "multiple" means two or more, unless otherwise explicitly specified.

[0148] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0149] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0150] The foregoing disclosure provides many different implementations or examples for carrying out different structures of this disclosure. To simplify this disclosure, the components and arrangements of specific examples are described above. Of course, these are merely examples and are not intended to limit this disclosure. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0151] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this disclosure. Different parts of different embodiments can be combined with each other without conflict, and these should all be covered within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An integrated detection device, characterized in that, include: The main body is equipped with multiple independent cavities; Multiple tubes are connected to multiple cavities in a one-to-one correspondence, and the multiple tubes are used to connect multiple test fluid pipelines to the corresponding cavities; Multiple pressure-sensitive elements are associated with the multiple cavities one by one. The pressure-sensitive elements are in contact with the fluid to be measured in the corresponding cavity to sense the pressure of the fluid to be measured and generate a corresponding pressure electrical signal. The conditioning module is electrically connected to the plurality of pressure-sensitive elements, and is used to process the pressure electrical signals generated by the pressure-sensitive elements and output a plurality of detection signals. The plurality of detection signals correspond one-to-one with the plurality of pressure-sensitive elements, and the detection signals are the signals after processing the pressure electrical signals generated by the pressure-sensitive elements.

2. The integrated detection device according to claim 1, characterized in that, The plurality of cavities includes a first cavity and a second cavity, the plurality of tubes includes a first tube and a second tube, and the plurality of pressure-sensitive elements includes a first pressure-sensitive element and a second pressure-sensitive element. The first tube and the second tube are respectively connected to the first cavity and the second cavity; The first pressure-sensitive element and the second pressure-sensitive element are in contact with the fluid to be measured in the first cavity and the second cavity, respectively, and generate corresponding first pressure electrical signal and second pressure electrical signal, respectively. The conditioning module is electrically connected to the first pressure-sensitive element and the second pressure-sensitive element, respectively, and is used to process the first pressure electrical signal and the second pressure electrical signal, and output a first detection signal and a second detection signal.

3. The integrated detection device according to claim 2, characterized in that, The conditioning module includes a first conditioning unit, which includes a first input channel and a second input channel. The first pressure-sensitive element and the second pressure-sensitive element are electrically connected to the first input channel and the second input channel, respectively.

4. The integrated detection device according to claim 3, characterized in that, The first conditioning unit includes a first output channel and a second output channel, which are used to output the first detection signal and the second detection signal, respectively.

5. The integrated detection device according to claim 4, characterized in that, It also includes a first transmission cable, which includes a first signal line, a second signal line, a first power line, and a second power line. The first signal line and the second signal line are electrically connected to the first output channel and the second output channel, respectively. The first power line and the second power line are electrically connected to the positive and negative power terminals of the first conditioning unit, respectively.

6. The integrated detection device according to claim 3, characterized in that, The first conditioning unit includes a third output channel, which is used to alternately output the first detection signal and the second detection signal.

7. The integrated detection device according to claim 6, characterized in that, It also includes a first transmission cable, which includes a signal line, a first power line and a second power line. The signal line is electrically connected to the third output channel, and the first power line and the second power line are electrically connected to the positive and negative power terminals of the first conditioning unit, respectively.

8. The integrated detection device according to claim 3, characterized in that, It also includes a communication bus cable, which is used to output the first detection signal and the second detection signal, and to provide power obtained from the outside to the first conditioning unit.

9. The integrated detection device according to claim 2, characterized in that, The conditioning module includes a second conditioning unit and a third conditioning unit. The second conditioning unit includes a first input channel and a first output channel. The first pressure electrical signal is electrically connected to the first input channel. The first output channel is used to output a first detection signal, which is a signal after processing the first pressure electrical signal. The third conditioning unit includes a second input channel and a second output channel. The second pressure electrical signal is electrically connected to the second input channel, and the second output channel is used to output a second detection signal, which is a signal after processing the second pressure electrical signal.

10. The integrated detection device according to claim 9, characterized in that, The integrated detection device further includes a second transmission cable, which includes a first signal line, a second signal line, a first power line, and a second power line. The first signal line and the second signal line are electrically connected to the first output channel and the second output channel, respectively. The first power line is electrically connected to the positive power supply of the second conditioning unit and the third conditioning unit, and the second power line is electrically connected to the negative power supply of the second conditioning unit and the third conditioning unit.

11. The integrated detection device according to claim 2, characterized in that, The detection range of the first pressure-sensitive element is 0 to 2 MPa; the detection range of the second pressure-sensitive element is 3.5 MPa to 4.5 MPa.

12. The integrated detection device according to claim 1, characterized in that, The plurality of cavities are arranged in parallel, and the pressure-sensitive element is installed at the end of the cavity away from the tube body, and the pressure-sensitive element is sealed to the cavity body; the conditioning module is located on the side of the pressure-sensitive element away from the cavity body; The integrated detection device also includes a cover, which is placed on the main body, and the conditioning module is located between the pressure-sensitive element and the cover.

13. The integrated detection device according to claim 1, characterized in that, It also includes a temperature sensing element, which is electrically connected to the conditioning module. The conditioning module is also used to process the temperature electrical signal generated by the temperature sensing element. The detection signal output by the conditioning module includes a pressure detection signal and a temperature detection signal.

14. The integrated detection device according to claim 1, characterized in that, It also includes a temperature detection device, the negative power terminal of which is electrically connected to the negative power terminal of the conditioning module. The integrated detection device also includes a temperature signal line, which is electrically connected to the signal terminal of the temperature detection device.

15. A control system, characterized in that, The integrated detection device according to any one of claims 1-14 further includes a control module electrically connected to the integrated detection device, the control module being used to control the device according to the detection signal output by the integrated detection device.

16. The control system according to claim 15, characterized in that, It also includes a signal isolation module, which includes an isolation input section and an isolation output section. The integrated detection device is electrically connected to the isolation input section, and the isolation output section is electrically connected to the control module.

17. The control system according to claim 16, characterized in that, The detection signal output by the integrated detection device is a digital signal, and the signal isolation module satisfies the following: The signal isolation module includes an optocoupler. The detection signal output by the integrated detection device is coupled to the input of the optocoupler. The control module is coupled to the output of the optocoupler. The control module is used to perform control based on the signal obtained from the output of the optocoupler; or... The signal isolation module includes a digital isolator, which includes an input section and an output section. The positive and negative power terminals of the input section are respectively coupled to the positive and negative power terminals of the integrated detection device, and the signal terminal of the input section is coupled to the detection signal of the integrated detection device. The positive and negative power terminals and the signal terminal of the output section are all coupled to the control module, which is used to perform control based on the signal obtained from the signal terminal of the output section.

18. The control system according to claim 16, characterized in that, The detection signal output by the integrated detection device is an analog signal. The signal isolation module includes an isolation operational amplifier, which includes an input section and an output section. The positive and negative power terminals of the input section are respectively coupled to the positive and negative power terminals of the integrated detection device. The two signal terminals of the input section are respectively coupled to the detection signal and the negative power terminal of the integrated detection device. The positive and negative power terminals and the two signal terminals of the output section are all coupled to the control module. The control module is used to perform control based on the signals obtained from the two signal terminals of the output section.

19. The control system according to claim 15, characterized in that, The control module includes a power socket for receiving power, and the positive and negative terminals of the integrated detection device are coupled to the positive and negative terminals of the power socket, respectively; or, The control module includes a power socket for receiving power supply, and the control system also includes a DC isolated power supply. The two input power pins of the DC isolated power supply are respectively coupled to the two power pins of the power socket, and the two output power pins of the DC isolated power supply are respectively coupled to the positive and negative power terminals of the integrated detection device. The control system further includes a power supply module, which includes a primary winding, a first-stage output winding, and a second-stage output winding. The primary winding of the power supply module is coupled to AC power, and the first-stage output winding of the power supply module is used to supply power to the control module. A capacitor is provided between the first-stage output winding and the primary winding. The second-stage output winding of the power supply module is coupled to the positive and negative terminals of the integrated detection device.

20. The control system according to claim 15, characterized in that, It also includes a compressor, wherein the first tube in the integrated detection device is connected to the return pipe of the compressor, the second tube in the integrated detection device is connected to the exhaust pipe of the compressor, and the control module is used to control the operation of the compressor according to the detection signal output by the integrated detection device.

21. An air conditioning system, characterized in that, It includes the integrated detection device according to any one of claims 1-14; or, it includes the control system according to any one of claims 15-20.

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