Pressure regulating assembly, pressure transmitter and air respirator

Abstract

The invention discloses a pressure regulating assembly, a pressure transmitter and an air respirator. The pressure regulating device is provided with a gas inlet cavity and a gas exhaust cavity for exhausting gas subjected to pressure regulation; the pressure transmitter is mounted and fixed on the pressure regulating device; the three-way connector is provided with three connectors, the first connector is in fluid connection with the air inlet cavity of the pressure regulating device, the second connector is in fluid connection with the pressure transmitter, and the third connector is arranged to be in fluid connection with a ventilation pipeline. A pressure transmitter of the pressure regulating assembly is fixedly installed on a pressure regulating device, the pressure transmitter is communicated with a ventilation pipeline and the pressure regulating device through a three-way connector, and by improving the position structure relation of the pressure transmitter and the pressure regulating device and the pipeline connection mode, the integration level of the assembly is greatly improved, the number of parts is reduced, and the cost is reduced. And therefore, the weight of the air respirator comprising the pressure regulating assembly and the load of firemen can be reduced.

Description

Technical Field

[0001] The present application relates to the field of fire fighting technology, and in particular to a pressure regulating component, a pressure transmitter and an air breathing apparatus. Background Art

[0002] A pressure transmitter is a device used to measure the pressure of high-pressure air in the air supply cylinder of an air breathing apparatus. It can transmit the detected pressure in the air supply cylinder to the pressure head-up display device in the mask so that firefighters using air breathing apparatus can understand the pressure status in the air supply cylinder.

[0003] Conventional pressure transmitters are installed on the back plate of the air breathing apparatus (air breathing back plate), and need to be connected to the pressure reducing valve and the gas supply cylinder through a long high-pressure pipeline. Therefore, the integration between this type of pressure transmitter and components such as the pressure reducing valve is not high, resulting in a large number of connectors, which increases the load on firefighters. At the same time, due to the large number of parts and complex connection relationships, the stability of the product may be affected when the surrounding environment is harsh when the product is used.

[0004] There is a need for an improved pressure transmitter that can solve the above problems. Summary of the invention

[0005] The main purpose of the embodiment of the present application is to provide a pressure regulating assembly, wherein the pressure transmitter is mounted and fixed to the pressure regulating device, and the pressure transmitter is connected to the ventilation pipeline and the pressure regulating device through a three-way joint. The above-mentioned installation method is combined with the connection method, so that when the pressure regulating assembly is used for an air breathing apparatus, the pressure transmitter does not need to be installed on the air breathing back plate, but is installed and fixed to the valve body of the pressure reducing valve, and the pressure transmitter can be connected to the high-pressure pipeline and the pressure reducing valve through a three-way joint, and the pressure transmitter does not need to be connected to the pressure reducing valve and the gas supply cylinder through a longer high-pressure pipeline fluid. This structure greatly improves the integration of the pressure regulating assembly and reduces the number of parts in the assembly by designing the positional structural relationship between the pressure transmitter and the pressure reducing valve and the pipeline connection method, which helps to reduce the weight of the air breathing apparatus and the weight of the firefighters.

[0006] The present application further provides a pressure transmitter, which integrates a pressure indicator light into the pressure transmitter. By utilizing a raised structure formed by the mounting cavity of the pressure transmitter itself, light-transmitting areas are arranged on the inclined two wings of the raised structure, so that the pressure indicator light can be seen within a 180-degree range at the back.

[0007] For the air breathing apparatus using the above-mentioned pressure transmitter, other persons (such as the user's companion or other firefighters) except the user of the air breathing apparatus (such as a firefighter) can see the display of the pressure indicator light of the pressure transmitter, so as to promptly inform the user of the air breathing apparatus of the pressure information in the gas supply cylinder or promptly discover the user's dangerous situation and come to rescue, thereby increasing the safety of the user of the air breathing apparatus.

[0008] For the above-mentioned pressure transmitter, further improvement of the embodiment of the present application can also enable pressure display to be performed by combining a wired connection method with a wireless connection method, thereby improving the reliability of pressure display.

[0009] The present application provides a voltage regulating assembly, including:

[0010] A pressure regulating device, comprising an air inlet cavity and an exhaust cavity for exhausting the pressure-regulated gas;

[0011] a pressure transmitter, the pressure transmitter being mounted and fixed to the pressure regulating device; and

[0012] A three-way joint, wherein the three-way joint has three interfaces, wherein the first interface of the three-way joint is fluidically connected to the air inlet chamber of the pressure regulating device, the second interface of the three-way joint is fluidically connected to the pressure transmitter, and the third interface of the three-way joint is configured to be fluidically connected to the ventilation pipeline.

[0013] In some exemplary embodiments, the pressure transmitter has a mounting cavity, the pressure regulating device includes a pressure regulating valve, and a valve body of the pressure regulating valve is embedded in the mounting cavity of the pressure transmitter.

[0014] In some exemplary embodiments, a cavity wall of the air inlet cavity is provided with a connection port penetrating the cavity wall, and the connection port is connected to the first interface of the three-way connector through a plug-in fluid.

[0015] In some exemplary embodiments, the pressure transmitter includes a pressure sensor, and a portion of the pressure sensor extends into the second interface of the three-way connector.

[0016] In some exemplary embodiments, the pressure regulating device includes a pressure reducing valve, and the first interface of the three-way joint is fluidically connected to an air inlet chamber of the pressure reducing valve.

[0017] In some exemplary embodiments, the pressure regulating device further comprises a pressure gauge, and the ventilation line is fluidically connected to the pressure gauge.

[0018] An air respirator, comprising:

[0019] Empty call backboard;

[0020] A gas supply bottle, which is mounted to the air breathing back plate and has a gas outlet; and

[0021] The pressure regulating assembly in any of the above exemplary embodiments is detachably mounted to the air-breathing back plate, and the air inlet cavity of the pressure regulating device of the pressure regulating assembly is connected to the air outlet of the air supply bottle.

[0022] The present application also provides a pressure transmitter, including:

[0023] A housing, wherein the housing has an installation cavity, the installation cavity is configured to be installed and fixed with the voltage regulating device, the installation cavity is configured so that the housing has a protruding structure protruding outward, the protruding structure has two wing parts inclined relative to each other, and the two wing parts are provided with light-transmitting areas;

[0024] a pressure sensor housed within the housing; and

[0025] A mounting plate is installed in the housing, and a pressure indicator light for indicating the pressure detected by the pressure sensor is installed on the mounting plate, and the pressure indicator light is configured to emit light and the light can be transmitted from the light-transmitting area.

[0026] In some exemplary embodiments, the shell includes a shell body and a mounting portion, the mounting portion is located outside the shell body, and the relatively first end and second end of the mounting portion are connected to the shell body, the mounting portion forms the raised structure, and the two parts of the mounting portion respectively close to the first end and the second end form the two wing parts, and the mounting cavity is formed between the mounting portion and the shell body.

[0027] In some exemplary embodiments, the shell body includes a first shell and a second shell, the first shell and the second shell are fixedly connected and cooperate to form a accommodating cavity, the mounting plate and the pressure sensor are installed in the accommodating cavity, and the mounting portion is connected to the second shell.

[0028] In some exemplary embodiments, a light-transmitting element is installed at the light-transmitting area.

[0029] In some exemplary embodiments, the light-transmitting area includes at least a first light-transmitting area and a second light-transmitting area, the first light-transmitting area is close to the first end of the mounting portion connected to the shell body, and the second light-transmitting area is close to the second end of the mounting portion connected to the shell body; the light-transmitting element includes at least a first light-transmitting element installed in the first light-transmitting area and a second light-transmitting element installed in the second light-transmitting area.

[0030] In some exemplary embodiments, the mounting portion is connected to a first end surface of the shell body, and the light emitting surface of the first light-transmitting element and the light emitting surface of the second light-transmitting element are both inclined relative to the first end surface.

[0031] In some exemplary embodiments, a side of the light emitting surface of the first light-transmitting element away from the first end of the mounting portion is inclined toward a direction away from the shell body and close to the second light-transmitting element, and a side of the light emitting surface of the second light-transmitting element away from the second end of the mounting portion is inclined toward a direction away from the shell body and close to the first light-transmitting element.

[0032] In some exemplary embodiments, the light transmission ranges of the first light-transmitting element and the second light-transmitting element partially overlap, and the total light transmission range A of the first light-transmitting element and the second light-transmitting element is set to: A≤180°.

[0033] In some exemplary embodiments, a spacing region is provided between the first light-transmitting region and the second light-transmitting region, and the spacing region is a non-light-transmitting region.

[0034] In some exemplary embodiments, the pressure indicator light includes at least one first pressure indicator light and at least one second pressure indicator light, the first pressure indicator light being configured so that the light it emits can be transmitted through the first light-transmitting element, and the second pressure indicator light being configured so that the light it emits can be transmitted through the second light-transmitting element.

[0035] In some exemplary embodiments, the mounting plate is an electrical control board of the pressure transmitter, the pressure sensor and the pressure indicator light are both electrically connected to the electrical control board, and the electrical control board is configured to control the pressure indicator light to indicate according to the pressure signal detected by the pressure sensor.

[0036] In some exemplary embodiments, the pressure indicator light has different display states, and the display states include at least one of an on / off state of the pressure indicator light and a color of the pressure indicator light;

[0037] The electric control board is configured to control the pressure indicator light to display different display states when the pressure detected by the pressure sensor is within different preset ranges.

[0038] In some exemplary embodiments, the electric control board is configured to control the pressure indicator light to display a first color and be always on when the pressure detected by the pressure sensor is within a first preset range;

[0039] The electric control board is configured to control the pressure indicator light to display a second color and be always on when the pressure detected by the pressure sensor is within a second preset range;

[0040] The electric control board is configured to control the pressure indicator light to display a third color and alternately light up and off at a preset frequency when the pressure detected by the pressure sensor is within a third preset range;

[0041] The value of the first preset range is greater than the value of the second preset range, and the value of the second preset range is greater than the value of the third preset range.

[0042] In some exemplary embodiments, the pressure transmitter further comprises:

[0043] The communication module is installed in the housing and is electrically connected to the electric control board. The electric control board is configured to control the communication module to transmit pressure signals outward.

[0044] The present application provides a voltage regulating assembly, including:

[0045] The pressure transmitter with a pressure indicator light as described in any of the above exemplary embodiments; and

[0046] The pressure regulating device comprises an air inlet cavity and an exhaust cavity for exhausting the pressure-regulated gas. The mounting cavity of the pressure transmitter is configured to mount and fix the pressure regulating device. The pressure sensor of the pressure transmitter is configured to detect the pressure of the air inlet cavity of the pressure regulating device.

[0047] The present application provides an air respirator, comprising:

[0048] Empty call backboard;

[0049] A gas supply bottle, which is mounted to the air breathing back plate and has a gas outlet; and

[0050] The pressure transmitter with pressure indicator light or the pressure regulating assembly including such a pressure transmitter described in any of the above exemplary embodiments is installed to the air-exhaling back plate, the gas supply bottle is located outside the raised structure of the shell of the pressure transmitter, and the gas supply bottle passes between the light-transmitting areas set on the two wings of the raised structure.

[0051] In some exemplary embodiments, the air respirator further comprises a mask, the gas supply cylinder is configured to provide gas to the mask, a display device is installed in the mask, and the display device is configured to display the pressure collected by the pressure transmitter.

[0052] Other features and advantages of the present application will be set forth in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0054] Figure 1 This is a schematic diagram of the structure of a voltage regulating assembly shown in an embodiment of the present application;

[0055] Figure 2 for Figure 1 Schematic diagram of the assembly structure of the pressure regulating device, the pressure sensor of the pressure transmitter and the three-way joint;

[0056] Figure 3 for Figure 1 Structural diagram of the medium pressure regulating device;

[0057] Figure 4 for Figure 1 Schematic diagram of the structure of the middle three-way joint;

[0058] Figure 5 This is a schematic structural diagram of a voltage regulating assembly shown in another embodiment of the present application;

[0059] Figure 6 for Figure 5 The schematic diagram of the assembly structure of the pressure regulating assembly and the medium pressure pipeline shown;

[0060] Figure 7 for Figure 6 A schematic diagram of a portion of the assembly structure shown;

[0061] Figure 8 This is a schematic structural diagram of a pressure transmitter according to an embodiment of the present application;

[0062] Fig. 9 for Figure 8 The exploded structural diagram of the pressure transmitter shown;

[0063] Fig.10 for Figure 8 A schematic diagram of the structure of the mounting portion and the second shell of the pressure transmitter shown;

[0064] Fig.11 for Figure 8 The schematic diagram of the main structure of the mounting portion and the second shell of the pressure transmitter shown;

[0065] Fig.12 for Figure 8 A schematic structural diagram of a first shell of the pressure transmitter shown;

[0066] Fig.13 This is a schematic structural diagram of a voltage regulating assembly shown in another embodiment of the present application;

[0067] Fig.14 for Fig.13 The exploded structural diagram of the pressure regulating assembly and the medium pressure pipeline shown;

[0068] Fig.15 This is a schematic diagram of the exploded structure of an air respirator according to an embodiment of the present application;

[0069] Fig.16 This is a schematic structural diagram of an air respirator according to an embodiment of the present application;

[0070] Fig.17 for Fig.16 An enlarged schematic diagram of the structure of part A (omitting the gas supply bottle).

[0071] Reference numerals:

[0072] 100-pressure transmitter, 200, 200'-pressure regulating assembly, 300-air breathing apparatus;

[0073] 1-shell, 11-shell body, 111-first shell, 112-second shell, 113-first end face, 12-installation portion, 121-first light-transmitting area, 122-second light-transmitting area, 13-installation cavity, 14-seal, 151-first light-transmitting element, 152-second light-transmitting element, 2-installation plate, 21-first pressure indicator light, 22-second pressure indicator light, 3-pressure sensor, 4-pressure regulating device, 41-inlet cavity, 42-exhaust cavity, 43-valve body, 44-connection port, 5-three-way connector, 51-first interface, 52-second interface, 53-third interface; 6-pressure gauge, 7-ventilation pipeline, 8-medium pressure pipeline, 9-air exhalation back plate, 10-gas supply bottle, 11-mask. DETAILED DESCRIPTION

[0074] Reference Figure 1-Figure 7 An exemplary embodiment of the present application provides a pressure regulating assembly 200, comprising: a pressure transmitter 100, a pressure regulating device 4 and a three-way joint 5, wherein the pressure regulating device 4 has an air inlet chamber 41 and an exhaust chamber 42 for discharging the pressure-regulated gas, and the pressure transmitter 100 is installed and fixed to the pressure regulating device 4; the three-way joint 5 has three interfaces, namely a first interface 51, a second interface 52 and a third interface 53, wherein the first interface 51 is fluidically connected to the air inlet chamber 41 of the pressure regulating device 4, the second interface 52 is fluidically connected to the pressure transmitter 100, and the third interface 53 is configured to be fluidically connected to the ventilation pipeline 7.

[0075] The gas entering the air inlet chamber 41 of the pressure regulating device 4 may not be directly provided to the user due to its high pressure, so the pressure of the gas entering the air inlet chamber 41 needs to be adjusted to a desired pressure value by the pressure regulating device 4. The pressure-regulated gas can be output from the exhaust chamber 42 of the pressure regulating device 4 for the intended application.

[0076] The cavity wall of the air inlet cavity 41 of the pressure regulating device 4 may be provided with a connection port 44 penetrating the cavity wall, so that the connection port 44 can be in fluid communication with the air inlet cavity 41. The first interface 51 of the three-way joint 5 can be fluidly connected to the air inlet cavity 41 or the connection port 44 of the pressure regulating device 4 to be in fluid communication with the gas in the air inlet cavity 41 or the connection port 44 of the pressure regulating device 4. The second interface 52 of the three-way joint 5 can be fluidly connected to the pressure transmitter 100, so that the gas pressure in the air inlet cavity 41 or the connection port 44 of the pressure regulating device 4 can be measured by the pressure transmitter 100, and then the measured pressure information can be transmitted to the electronic control board of the pressure transmitter 100, so as to be transmitted to other display devices that can display pressure through the communication module or displayed by the pressure transmitter 100 itself. The third interface 53 of the three-way joint 5 can be fluidly connected to the ventilation pipeline 7 to guide the gas in the air inlet cavity 41 or the connection port 44 of the pressure regulating device 4 to another device for various purposes. It should be understood that the pressure transmitter 100 here can be various types of pressure transmitters, for example, it can be a pressure transmitter without a pressure indicator light, or it can be a pressure transmitter with a pressure indicator light.

[0077] Since the pressure transmitter 100 is installed and fixed to the pressure regulating device 4 and combined with the three-way joint 5, the first interface 51 of the three-way joint 5 can be fluidically connected to the air inlet chamber 41 of the pressure regulating device 4, and the second interface 52 can be fluidically connected to the pressure transmitter 100. Therefore, there is no need to connect an additional gas pipeline between the pressure transmitter 100 and the pressure regulating device 4. The pressure transmitter 100 can be directly connected to the three-way joint 5, and the three-way joint 5 can be directly connected to the pressure regulating device 4, which is beneficial to saving costs, simplifying the structure, making the structure more compact and integrated, and also improving the reliability of the connection. When the pressure regulating assembly 200 is used for an air breathing apparatus, the pressure transmitter 100 does not need to be installed on the air breathing apparatus back plate, but is fixed to the pressure regulating device (such as a pressure reducing valve) 4, and the pressure transmitter 100 can be connected to the ventilation pipeline (such as a high-pressure pipeline) and the pressure regulating device (such as a pressure reducing valve) 4 through a three-way connector 5, and the pressure transmitter 100 does not need to be connected to the pressure regulating device (such as a pressure reducing valve) 4 and the gas supply bottle through a long high-pressure pipeline. This structure greatly improves the integration of the pressure regulating assembly 200 and reduces the number of parts in the pressure regulating assembly 200 by designing the installation position and pipeline connection method of the pressure transmitter 100, thereby helping to reduce the weight of the air breathing apparatus and the weight of the firefighters, and improves the reliability of the pipeline connection of the air breathing apparatus and improves the performance of the air breathing apparatus.

[0078] In some exemplary embodiments, Figure 1-Figure 3 As shown, the pressure transmitter 100 has an installation cavity 13 , and the pressure regulating device 4 includes a pressure regulating valve, and a valve body 43 of the pressure regulating valve is embedded in the installation cavity 13 of the pressure transmitter 100 .

[0079] The upper part of the valve body 43 of the pressure regulating valve may be provided with a cylindrical protrusion, and the installation cavity 13 of the pressure transmitter 100 is correspondingly set as a cylindrical cavity to cooperate with the cylindrical protrusion of the valve body 43. The pressure transmitter 100 is installed to the valve body 43 of the pressure regulating valve through the installation cavity 13, so that the pressure transmitter 100 and the pressure regulating valve are integrated together, with a compact structure and a small occupied space, and the pressure transmitter 100 can be placed close to the three-way connector 5, so that both the pressure transmitter 100 and the pressure regulating valve are conveniently connected to the three-way connector 5.

[0080] In some exemplary embodiments, Figure 3-Figure 4 As shown, the air inlet cavity 41 and the connection port 44 and the ventilation pipeline 7 can all be high-pressure gas pipelines, which are interconnected, and the exhaust cavity 42 can be a medium-pressure gas pipeline after decompression treatment, which is not directly connected to the air inlet cavity 41, the connection port 44 and the ventilation pipeline 7, but is indirectly connected through a decompression component. The connection port 44 is plugged into the first interface 51 of the three-way connector 5.

[0081] The connection port 44 provided on the cavity wall of the air inlet cavity 41 can be communicated with the interior of the air inlet cavity 41, and the connection port 44 can be fluidically connected with the first interface 51 of the three-way joint 5 by plugging, so as to introduce the gas in the air inlet cavity 41 of the pressure regulating device 4 into the three-way joint 5. The first interface 51 of the three-way joint 5 can be inserted into the connection port 44 of the air inlet cavity 41, or the connection port 44 of the air inlet cavity 41 can be inserted into the first interface 51 of the three-way joint 5. A sealing member can also be provided between the first interface 51 of the three-way joint 5 and the connection port 44 to ensure good sealing between the first interface 51 of the three-way joint 5 and the connection port 44 to prevent air leakage.

[0082] In addition, the first interface 51 of the three-way connector 5 is plugged into the connection port 44, so that the first interface 51 of the three-way connector 5 can be directly connected to the connection port 44, and no connecting pipeline is required between the two, which is beneficial to reducing the overall weight of the pressure regulating assembly 200 and improving the reliability of the connection.

[0083] In some exemplary embodiments, Figure 2 As shown, the pressure transmitter includes a pressure sensor 3 , and a portion of the pressure sensor 3 extends into the second interface 52 of the three-way connector 5 .

[0084] Since the first interface 51 of the three-way joint 5 can be connected to the air inlet chamber 41 or the connecting port 44 of the pressure regulating device 4, part of the pressure sensor 3 extends into the second interface 52 of the three-way joint 5, so that the gas in the air inlet chamber 41 or the connecting port 44 can be introduced into the three-way joint 5. The pressure sensor 3 of the pressure transmitter 100 can detect the pressure of the gas in the three-way joint 5 and transmit the detected pressure information to the electronic control board of the pressure transmitter 100 so that the pressure information can be displayed through the display device.

[0085] In some exemplary embodiments, Figure 1-Figure 4 As shown, the pressure regulating device 4 includes a pressure reducing valve, and the first interface 51 of the three-way connector 5 is fluidically connected to the air inlet chamber 41 of the pressure reducing valve. For example, the gas in the air inlet chamber 41 of the pressure regulating device 4 can be high-pressure compressed air (such as the air inlet chamber 41 can be connected to the air supply bottle of an air respirator), which cannot be used directly, for example, cannot be directly breathed by a person. The pressure reducing valve of the pressure regulating device 4 can reduce the gas pressure in the air inlet chamber 41 of the pressure regulating device 4, so that the gas discharged from the exhaust chamber 42 is suitable for the needs of the application, for example, suitable for human breathing.

[0086] Of course, the pressure regulating device 4 may also include a boost valve, so that the pressure of the gas discharged from the exhaust chamber 42 is higher than the pressure of the gas in the intake chamber 41 .

[0087] In some exemplary embodiments, Figure 5 As shown, the pressure regulating assembly 200 further includes a pressure gauge 6, and the vent line 7 is fluidly connected to the pressure gauge 6. The pressure gauge 6 can be connected to the air inlet chamber 41 of the pressure regulating device 4 through the vent line 7 and the three-way joint 5 to measure the pressure of the gas in the air inlet chamber 41 of the pressure regulating device 4 or the gas source connected to the air inlet chamber 41, and the pressure gauge 6 can display the pressure of the high-pressure gas in the air inlet chamber 41 or the gas source. The pressure gauge 6 can display an accurate pressure value for reference by the user.

[0088] The present application also provides an air respirator, referring to Fig.15 , comprising: an air-exhalation back plate 9, a gas supply bottle 10 and a pressure regulating assembly 200 provided in any of the aforementioned embodiments, wherein the gas supply bottle 10 has an air outlet and is mounted to the air-exhalation back plate 9; the pressure regulating assembly 200 is detachably mounted to the air-exhalation back plate 9, and the air inlet cavity of the pressure regulating device 4 of the pressure regulating assembly 200 is connected to the air outlet of the gas supply bottle 10.

[0089] The air breathing back plate may have a waist belt and shoulder straps, and may be worn on a user (such as a firefighter). The air supply bottle 10 is the air source of the air breathing apparatus 300, and compressed air may be contained in the air supply bottle 10. The air supply bottle 10 is mounted on the outside of the air breathing back plate 9 (i.e., the side facing away from the human body). The pressure regulating device 4 of the air breathing apparatus 300 may include a pressure reducing valve. Usually, the rated working air pressure of the air supply bottle 10 of the air breathing apparatus 300 is 30MPa, which does not meet the normal breathing pressure of a person, so it is necessary to use a pressure reducing valve to reduce the pressure of the high-pressure air in the air supply bottle 10 and then supply it to the user. The air outlet of the air supply bottle 10 may be connected to the air inlet port of the pressure reducing valve to communicate with the air inlet chamber 41 of the pressure reducing valve, thereby supplying high-pressure air to the pressure reducing valve. The high-pressure air is reduced in pressure by the pressure reducing valve and then supplied to the user for breathing.

[0090] In the air respirator 300, reference Figure 1-Figure 7 and Fig.15 The first interface 51 of the three-way joint 5 can be connected to the air inlet chamber 41 of the pressure reducing valve (i.e., connected to the air supply bottle), and the third interface 53 and the second interface 52 of the three-way joint 5 can be connected to the pressure gauge 6 and the pressure sensor 3 of the pressure transmitter 100 respectively. The pressure gauge 6 can be connected to the third interface 53 of the three-way joint 5 through the ventilation pipeline (such as a high-pressure hose) 7, so that the user of the air respirator 300 can conveniently see the reading of the pressure gauge 6 from the front of the body. The pressure sensor 3 of the pressure transmitter 100 can be connected to the second interface 52 of the three-way joint 5, and the second interface 52 of the three-way joint 5 connected to the pressure sensor 3 can face the back of the user, so that the pressure transmitter 100 is arranged in the gap at the bottom of the air respirator back plate 9 close to the back of the user.

[0091] By providing the three-way joint 5 in the air respirator 300, the pressure transmitter 100 can be cleverly integrated with the pressure reducing valve by utilizing the existing space at the bottom of the air respirator back plate 9, thereby avoiding the pressure transmitter 100 from occupying additional space and reducing the volume of the air respirator 300. The pressure sensor 3 of the pressure transmitter 100 can be plugged and installed on the three-way joint 5, and there is no need to lead a high-pressure hose from the pressure reducing valve to connect the pressure transmitter 100, thereby reducing the number of high-pressure hoses, making the air respirator 300 more compact and light, and reducing the cost. In addition, the pressure transmitter 100 is directly connected to the three-way joint 5, which also increases the firmness of the connection and improves the overall stability and reliability of the air respirator 300. The output port of the pressure reducing valve can be communicated with the exhaust chamber 42 of the pressure reducing valve, and the output port of the pressure reducing valve can be located on the same side of the pressure reducing valve as the connection port 44 of the air inlet chamber 41, and is adjacent to the three-way joint 5. The output port of the pressure reducing valve is connected to the air supply valve through the medium-pressure pipeline 8 to output the decompressed air to the air supply valve for the user to breathe.

[0092] The present application embodiment provides a pressure transmitter 100, referring to Figure 8-Figure 12 , including: a housing 1, a pressure sensor 3 (such as Figure 7 As shown, it can be connected to a tee connector 5) and a mounting plate 2.

[0093] The housing 1 has a mounting cavity 13, which is arranged to be connected to the pressure regulating device 4 (such as Figure 1 The mounting cavity 13 enables the housing 1 to have a raised structure protruding outward, the raised structure having two wing parts inclined relative to each other, and the inclined two wing parts are provided with light-transmitting areas.

[0094] The pressure sensor 3 is accommodated in the housing 1, and the mounting plate 2 is installed in the housing 1. The mounting plate 2 is equipped with a pressure indicator light for indicating the pressure detected by the pressure sensor 3. The pressure indicator light is configured to emit light and the light can pass through the light-transmitting area.

[0095] The housing 1 of the pressure transmitter 100 has a mounting cavity 13, which makes the housing 1 have a protruding structure protruding outward, that is, part of the cavity wall of the mounting cavity 13 forms a protruding structure protruding outward, and the two wings of the protruding structure are arranged to be inclined relative to each other. The two wings of the protruding structure are arranged to be inclined relative to the outer surface of other parts of the housing adjacent to the protruding structure, and light-transmitting areas are arranged on the inclined two wings to allow the light emitted by the pressure indicator to pass through.

[0096] The light-transmitting areas are directly arranged by using the two wings of the raised structure formed by the installation cavity 13, so that the installation cavity 13 can not only be used for installation and fixation with the pressure regulating device 4, but the cavity wall of the installation cavity 13 forming the raised structure can also be provided with the light-transmitting area, so that the installation cavity 13 has a dual function, which can simplify the structure of the housing 1. The two wings of the raised structure are inclined, so that the light emitted by the pressure indicator light can be seen from a wide range of vision outside the pressure sensor, for example, with a 180-degree field of vision.

[0097] The pressure sensor 3 is installed in the housing 1 so that the pressure transmitter 100 detects the gas pressure (such as the gas pressure in the gas supply bottle of the air respirator) using the pressure sensor 3. By providing a pressure indicator light for the pressure transmitter 100, the pressure data detected by the pressure sensor 3 of the pressure transmitter 100 is intuitively presented through the light emitted by the pressure indicator light. The light emitted by the pressure indicator light of the pressure transmitter 100 can be displayed toward people through the light-transmitting area of ​​the housing 1, and can be conveniently observed in real time, so that people can promptly and quickly understand the pressure status of the gas.

[0098] By setting a pressure indicator light, the pressure information detected by the pressure transmitter 100 is converted into a light signal visible to the naked eye of the pressure indicator light, so that the pressure information can be intuitively presented through the pressure indicator light. Therefore, by observing the pressure indicator light, people can easily perceive abnormal conditions such as insufficient gas pressure, realize the danger in time and take measures. Therefore, the setting of the pressure indicator light adds important pressure indication and reminder functions to the pressure transmitter 100, providing further protection for the safety of users.

[0099] The pressure indicator light is arranged in the housing 1 of the pressure transmitter 100. Therefore, when the pressure information detected by the pressure sensor 3 is displayed by the pressure indicator light, there is no need to transmit the pressure signal through remote communication, thus avoiding the problem that people cannot obtain the pressure information when the communication fails. The setting of the pressure indicator light ensures the pressure display effect, so that people can timely discover abnormal or dangerous situations such as insufficient gas pressure and take measures, thereby increasing safety protection. When the pressure transmitter 100 is applied to an air respirator, the pressure transmitter 100 can detect the pressure information in the gas supply cylinder of the air respirator, so that other people (such as: the user's companion or other firefighters) other than the user of the air respirator (such as a firefighter) can see the display of the pressure indicator light of the pressure transmitter 100, so that other people can promptly inform the user of the air respirator of the pressure information in the gas supply cylinder, or other people can promptly discover the dangerous situation of the user of the air respirator and come to rescue, thereby increasing the safety protection of the user of the air respirator.

[0100] In some exemplary embodiments, Figure 8-Figure 12 As shown, the shell 1 includes a shell body 11 and a mounting portion 12. The mounting portion 12 can be located outside the shell body 11, and the first end and the second end of the mounting portion 12 that are relatively arranged are connected to the shell body 11. The mounting portion 12 can form a raised structure, and the two parts of the mounting portion 12 that are respectively close to the first end and the second end form two wing parts of the raised structure, and a mounting cavity 13 is formed between the mounting portion 12 and the shell body 11.

[0101] For the shell body 1, its mounting portion 12 can be arranged at an appropriate position outside the shell body 11 (for example, the mounting portion 12 can be arranged at the upper part of the rear side of the shell body 11), the light-transmitting area can be formed by a through hole penetrating the two wing parts of the raised structure, and a light-transmitting element can be installed at the through hole (light-transmitting area), and the light emitted by the air pressure indicator light installed in the shell body 11 can be transmitted from the light-transmitting element, and the transmitted light can be seen from the outside and will not be blocked, so that other people other than the user of the air respirator can promptly know the pressure information of the gas supply bottle.

[0102] In the embodiment of the present application, the mounting portion 12 and the shell body 11 are an integrated structure, but it should be understood that the mounting portion 12 and the shell body 11 can also be separate structures, and connected together by appropriate means, such as: connected together by means of clamping, screw connection, etc. A mounting cavity 13 is formed between the mounting portion 12 and the shell body 11, and the mounting cavity 13 can be used to assemble the pressure transmitter 100 with other devices, such as the mounting cavity 13 can be used to assemble with a pressure regulating device (such as a pressure reducing valve) 4 for regulating the pressure of the air supply bottle of the air respirator.

[0103] In some exemplary embodiments, a light-transmitting element is installed at the light-transmitting area. The shape of the light-transmitting element is adapted to the shape of the light-transmitting area. The light-transmitting area can be continuous or spaced apart. The light-transmitting area and the light-transmitting element can extend in a lateral direction so that the pressure indicator light has a larger irradiation range in the lateral direction, so that the light emitted by the pressure indicator light can be seen from a wide range of vision outside the pressure sensor.

[0104] In some exemplary embodiments, Figure 8-Figure 11 As shown, the light-transmitting area at least includes a first light-transmitting area 121 and a second light-transmitting area 122, the first light-transmitting area 121 is close to the first end of the mounting portion 12 connected to the shell body 11, and the second light-transmitting area 122 is close to the second end of the mounting portion 12 connected to the shell body 11. The light-transmitting element may at least include a first light-transmitting element 151 installed in the first light-transmitting area 121 and a second light-transmitting element 152 installed in the second light-transmitting area 122.

[0105] The left and right ends of the mounting portion 12 can be connected to the shell body 11 respectively, and the left and right ends of the mounting portion 12 are symmetrically provided with a first light-transmitting area 121 and a second light-transmitting area 122. The first light-transmitting area 121 and the second light-transmitting area 122 can extend a certain length in the transverse direction, and the first light-transmitting element 151 and the second light-transmitting element 152 are respectively installed in the first light-transmitting area 121 and the second light-transmitting area 122, and the shapes of the first light-transmitting element 151 and the second light-transmitting element 152 are respectively adapted to the shapes of the first light-transmitting area 121 and the second light-transmitting area 122. Since the first light-transmitting area 121 and the second light-transmitting area 122 extend a certain length in the transverse direction, the pressure indicator light has a larger illumination range, so that other people other than the user of the air respirator can see the light emitted by the pressure indicator light from different positions. It should be understood that the light-transmitting areas and the corresponding light-transmitting elements can also have other numbers or be arranged at other positions.

[0106] In some exemplary embodiments, Fig. 9 As shown, the pressure indicator light includes at least one first pressure indicator light 21 and at least one second pressure indicator light 22. The light emitted by at least one first pressure indicator light 21 is configured to be able to pass through the first light-transmitting element 151, and the light emitted by at least one second pressure indicator light 22 is configured to be able to pass through the second light-transmitting element 152.

[0107] At least one first pressure indicator light 21 and at least one second pressure indicator light 22 may be LED lights. At least one first pressure indicator light 21 and at least one second pressure indicator light 22 may be symmetrically arranged on the left and right sides of the mounting plate 2, and at least one first pressure indicator light 21 and at least one second pressure indicator light 22 may face the first light-transmitting area 121 and the second light-transmitting area 122 of the mounting portion 12, respectively, so that the light energy emitted by at least one first pressure indicator light 21 can be transmitted from the first light-transmitting element 151 installed in the first light-transmitting area 121, and the light energy emitted by at least one second pressure indicator light 22 can be transmitted from the second light-transmitting element 152 installed in the second light-transmitting area 122. At least one first pressure indicator light 21 and at least one second pressure indicator light 22 may always have the same display state during use, that is, the light transmitted from the first light-transmitting element 151 and the second light-transmitting element 152 are the same, so that the same pressure information can be obtained when the first pressure indicator light 21 or the second pressure indicator light 22 is seen alone. The first pressure indicator light 21 may have one or more, and the second pressure indicator light 22 may also have one or more. The "plurality" here includes at least two.

[0108] Of course, in addition to respectively setting at least one first pressure indicator light 21 and at least one second pressure indicator light 22 on the left and right sides of the mounting plate 2 to correspond to the first light-transmitting element 151 and the second light-transmitting element 152 respectively, at least one pressure indicator light can also be set only in the middle of the mounting plate 2. The light emitted by the at least one pressure indicator light can be transmitted from both the first light-transmitting element 151 and the second light-transmitting element 152.

[0109] In some exemplary embodiments, Figure 8-Figure 11 As shown, the mounting portion 12 is connected to the first end surface 113 of the shell body 11 , and the light emitting surface of the first light-transmitting element 151 and the light emitting surface of the second light-transmitting element 152 are arranged obliquely relative to the first end surface 113 .

[0110] The left and right side parts of the end surface of the mounting portion 12 facing away from the shell body 11 are respectively inclined relative to the first end surface 113 of the shell body 11, and the first light-transmitting area 121 and the second light-transmitting area 122 respectively penetrate the left and right side parts of the end surface of the mounting portion 12 facing away from the shell body 11. The light-emitting surfaces of the first light-transmitting element 151 and the second light-transmitting element 152 installed in the first light-transmitting area 121 and the second light-transmitting area 122 can be flush with the end surface of the mounting portion 12 facing away from the shell body 11 as a whole, so that the light emitted by the pressure indicator light can be easily observed from different angles after it is transmitted from the light-emitting surfaces of the first light-transmitting element 151 and the second light-transmitting element 152, so that other people other than the user of the air respirator can see the light emitted by the pressure indicator light from different positions.

[0111] In some exemplary embodiments, Figure 8-Figure 11As shown, the side of the light emitting surface of the first light-transmitting element 151 away from the first end of the mounting portion 12 is inclined in the direction away from the shell body 11 and close to the second light-transmitting element 152, and the side of the light emitting surface of the second light-transmitting element 152 away from the second end of the mounting portion 12 is inclined in the direction away from the shell body 11 and close to the first light-transmitting element 151.

[0112] The right side of the light emitting surface of the first light-transmitting element 151 on the left side is inclined in a direction away from the shell body 11 and close to the second light-transmitting element 152 on the right side, and the left side of the light emitting surface of the first light-transmitting element 151 on the right side is inclined in a direction away from the shell body 11 and close to the second light-transmitting element 152 on the left side. In this way, the light emitting range of the light emitting surfaces of the first light-transmitting element 151 and the second light-transmitting element 152 is increased, and the visual range of the pressure indicator light is expanded, so that other people other than the user of the air respirator can see the light emitted by the pressure indicator light from the 180-degree area behind the user.

[0113] In some exemplary embodiments, Figure 8-Figure 11 As shown, the light transmission ranges of the first light-transmitting element 151 and the second light-transmitting element 152 partially overlap, and the total light transmission range A of the first light-transmitting element and the second light-transmitting element is set to: A≤180°. The light emitted by the first light-transmitting element 151 and the second light-transmitting element 152 can be visible in a wide field of view, for example, the field of view can be up to 180°. It should be noted that the total light transmission range of the first light-transmitting element 151 and the second light-transmitting element 152 here is not a simple addition of the light transmission range of the first light-transmitting element 151 and the light transmission range of the second light-transmitting element 152, but it is necessary to consider whether the light transmission ranges of the first light-transmitting element 151 and the second light-transmitting element 152 have an overlapping range. In the case of an overlapping range, after adding the light transmission ranges of the first light-transmitting element 151 and the second light-transmitting element 152, it is necessary to subtract the overlapping range.

[0114] In some exemplary embodiments, Figure 8-Figure 11 As shown, there is a spacing area between the first light-transmitting area 121 and the second light-transmitting area 122, and the spacing area can be set as a non-light-transmitting area.

[0115] The interval between the first light-transmitting area 121 and the second light-transmitting area 122 can be set as a non-light-transmitting area. After the pressure transmitter 100 is applied to the air respirator, the interval between the first light-transmitting area 121 and the second light-transmitting area 122 may be blocked by other components (such as the gas supply bottle), so the interval is set as a non-light-transmitting area to facilitate the arrangement of other components (such as the gas supply bottle) and prevent other components (such as the gas supply bottle) from affecting the light transmission of the first light-transmitting area 121 and the second light-transmitting area 122.

[0116] In some exemplary embodiments, Fig. 9and Fig.13 As shown, the mounting plate 2 for mounting the pressure indicator light may be the electric control board of the pressure transmitter 100, the pressure sensor 3 and the pressure indicator light are both electrically connected to the electric control board, and the electric control board is configured to control the pressure indicator light to indicate according to the pressure signal detected by the pressure sensor 3.

[0117] The pressure sensor 3 can detect the pressure in the gas supply bottle, and can convert the detected gas pressure signal into an electrical signal and output the electrical signal to the electric control board in the housing 1. The control chip of the electric control board can control the pressure indicator light provided on the electric control board to present various display states according to the electrical signal output by the pressure sensor 3, so as to indicate the pressure condition detected by the pressure sensor 3.

[0118] In some exemplary embodiments, the pressure indicator light has different display states, and the display states include at least one of an on / off state of the pressure indicator light and a color of the pressure indicator light.

[0119] The electric control board is configured to control the pressure indicator light to display different display states when the pressure detected by the pressure sensor 3 is within different preset ranges. For example, the pressure indicator light can display different display states according to the pressure, such as on, off, flashing at a certain frequency, or showing different colors.

[0120] The preset pressure range can be set according to the specific application, for example, it can be divided into a safe pressure range, an intermediate pressure range and a dangerous pressure range. By making the pressure indicator light display different display states in different preset ranges, the user or his companion can be alerted in a simple and intuitive way to understand the pressure range in real time, notice the dangerous situation in time and take measures, thus avoiding accidents to the user and improving the safety of the user.

[0121] In some exemplary embodiments, the electric control board is configured to control the pressure indicator light to display a first color and be always on when the pressure detected by the pressure sensor 3 is within a first preset range; the electric control board is configured to control the pressure indicator light to display a second color and be always on when the pressure detected by the pressure sensor 3 is within a second preset range; the electric control board is configured to control the pressure indicator light to display a third color and be alternately on and off at a preset frequency when the pressure detected by the pressure sensor 3 is within a third preset range. The value of the first preset range is greater than the value of the second preset range, and the value of the second preset range is greater than the value of the third preset range.

[0122] For example, the preset pressure range of the air supply cylinder of the air respirator can be 0 to 30 MPa. The first preset range can be a safe pressure range, for example, 10 MPa to 30 MPa. When the pressure of the air supply cylinder is in the first preset range, the pressure indicator light displays a first color, such as green, and is always on. The second preset range can be an intermediate pressure range, for example, 6 MPa to 10 MPa. When the pressure of the air supply cylinder is in the second preset range, the pressure indicator light displays a second color, such as yellow, and is always on. The third preset range can be a dangerous pressure range, for example, less than 6 MPa. When the pressure of the air supply cylinder is in the third preset range, the pressure indicator light displays a third color, such as red, and alternates between on and off at a preset frequency, for example, flashing at a frequency of 2 Hz. The flashing red light makes the prompt more obvious and easier to be discovered in time.

[0123] It should be understood that the color, on / off status, flashing frequency, etc. of the above indicator lights can be set according to specific needs and are not limited to the above description, and the preset pressure range can also be set to other ranges according to actual needs. It should also be understood that the same pressure indicator light can display different colors to indicate the pressure status, and multiple pressure indicator lights of different colors can be used to indicate the pressure status.

[0124] In high-risk environments, users (such as firefighters, etc.) are prone to accidents, such as falling or being injured and unable to move. Therefore, in addition to indicating the pressure status, the pressure indicator light can also alarm when the user falls or stops moving.

[0125] The alarm can be divided into two states: pre-alarm and full alarm. When the user is initially detected to be stationary, the pressure indicator light will issue a pre-alarm. If the user continues to be inactive, it will enter the full alarm state. The time of inactivity can be set. For example, it can be set to pre-alarm state if there is no activity within 30 seconds, and full alarm state if there is no activity for another 10 seconds. In the pre-alarm state, the pressure indicator light can be set to alternately light up and off at a preset frequency, or to alternately display two different colors at a preset frequency, such as: it can alternately display yellow and green at a frequency of 1Hz.

[0126] The full alarm is an alarm state in which the user is still inactive after a period of time (e.g., 10 seconds) after the pre-alarm. This can be called a fall alarm. At this time, the pressure indicator light indicates an SOS alarm, that is, the pressure indicator light flashes red intermittently, and repeats this cycle to alert companions or rescuers to come to the rescue in time.

[0127] The priority of the various display states of the pressure indicator light is: full alarm > pressure alarm (i.e. pressure is less than 6MPa) > pre-alarm > pressure warning (i.e. pressure is between 6MPa and 10MPa) > normal pressure (i.e. pressure is between 10MPa and 30MPa).

[0128] In some exemplary embodiments, the pressure transmitter 100 further includes a communication module, which can be installed in the housing 1 and can be electrically connected to the electric control board, and the electric control board is configured to control the communication module to transmit pressure signals to the outside.

[0129] The communication module can be a wireless module, such as a Bluetooth module. The communication module can be installed on the electric control panel. The communication module can transmit the pressure data detected by the pressure sensor 3 to the outside world in a wireless form (for example, Bluetooth) so as to be used in conjunction with other devices provided with a wireless data receiving module (such as a display device in the mask of an air respirator). Of course, the present application is not limited to this form of wireless transmission, and other wireless transmission technologies can also be used, such as RFID, zigbee, wifi, NFC, etc. The pressure information is transmitted to the outside world in a wireless form without the need for wiring, and long-distance signal transmission can be easily achieved.

[0130] In some exemplary embodiments, Figure 8-Figure 12 As shown, the shell body 11 includes a first shell 111 and a second shell 112. The first shell 111 and the second shell 112 are fixedly connected and cooperate to form an accommodating cavity. The mounting plate 2, the pressure sensor 3, the communication module, etc. can be installed in the accommodating cavity, and the mounting part 12 is arranged on the second shell 112.

[0131] The first shell 111 and the second shell 112 of the shell body 11 can be connected together by fasteners (such as screws) or by other means to facilitate disassembly and maintenance. A seal 14 can be provided between the first shell 111 and the second shell 112 to achieve a sealed connection between the first shell 111 and the second shell 112. The mounting plate 2 is provided in the accommodating cavity surrounded by the first shell 111 and the second shell 112. The mounting plate 2 can be provided with a through hole for the fastener to pass through, so that the mounting plate 2 is connected to the first shell 111 and the second shell 112 by the fastener. The mounting portion 12 can be provided at the upper end of the second shell 112 on the side (i.e., the outer side) away from the first shell 111. A trapezoidal protrusion may be provided on one side of the first shell 111 facing the second shell 112, and the second shell 112 may be correspondingly provided with a trapezoidal groove. The trapezoidal protrusion of the first shell 111 may pass through the trapezoidal groove of the second shell 112 to position the first shell 111 and the second shell 112 relative to each other so that the first shell 111 and the second shell 112 can be connected together by fasteners.

[0132] The present application also provides a voltage regulating assembly 200', referring to Fig.13 and Fig.14, comprising: a pressure regulating device 4 and a pressure transmitter 100 with a pressure indicator light according to any of the above embodiments, the pressure regulating device 4 having an air inlet cavity 41 and an exhaust cavity 42 for exhausting the pressure-regulated gas, the mounting cavity 13 of the pressure transmitter 100 being mounted and fixed to the pressure regulating device 4, the pressure sensor 3 of the pressure transmitter 100 being configured to detect the pressure of the air inlet cavity 41 or the connecting port 44 of the pressure regulating device 4, wherein the connecting port 44 can be disposed on the cavity wall of the air inlet cavity 41 of the pressure regulating device 4, and penetrate the cavity wall of the air inlet cavity 41, so that the connecting port 44 can be communicated with the air inlet cavity 41.

[0133] The pressure sensor 3 of the pressure transmitter 100 can transmit the measured pressure information to the electric control board of the pressure transmitter 100 so as to be displayed through the pressure indicator light of the pressure transmitter. That is, the pressure of the air inlet cavity 41 or the connection port 44 of the pressure regulating device 4 can be intuitively displayed through the different display states of the pressure indicator light of the pressure transmitter 100.

[0134] It should be noted that the pressure transmitter 100 installed on the pressure regulating device 4 can be directly or indirectly connected to the air inlet chamber 41 of the pressure regulating device 4; or, the pressure transmitter 100 installed on the pressure regulating device 4 and the air inlet chamber 41 (or the connecting port 44) of the pressure regulating device 4 can be respectively connected to the two interfaces of the three-way joint; or, the pressure transmitter 100 can also be connected to the air inlet chamber 41 or the connecting port 44 of the pressure regulating device 4 through a connecting pipeline, so that the pressure transmitter 100 detects the pressure of the air inlet chamber 41 or the connecting port 44 of the pressure regulating device 4.

[0135] The present application also provides an air respirator 300, such as Fig.16 and Fig.17 As shown, it includes: an air-breathing back plate 9 and an air supply bottle 10, the air supply bottle 10 has an air outlet and is installed on the air-breathing back plate 9. The air respirator 300 also includes a pressure transmitter 100 with a pressure indicator light according to any of the above embodiments or a pressure regulating assembly 200' including such a pressure transmitter 100, the pressure transmitter 100 or the pressure regulating assembly 200' is installed on the air-breathing back plate 9, the air supply bottle 10 is located outside the raised structure of the housing 1 of the pressure transmitter 100, and the air supply bottle 9 can pass between the light-transmitting areas set on the two wings of the raised structure. Among them, Fig.17 yes Fig.16 An enlarged schematic diagram of the structure of part A (omitting the gas supply bottle).

[0136] In the air respirator 300, the pressure indicator light of the pressure transmitter 100 can be called a companion light, and its main function is to enable the companion or other personnel of the user wearing the air respirator 300 to visually see the display status of the pressure indicator light from behind the user, so as to promptly inform the user or promptly discover the user's dangerous situation and come to rescue, thereby increasing the safety of the user. The pressure transmitter 100 can be automatically activated as soon as the bottle valve of the gas supply bottle 10 is opened.

[0137] The pressure transmitter 100 can be arranged between the gas supply bottle 10 and the air breathing back plate 9, and the middle part of the pressure transmitter 100 (such as: the part between the first light-transmitting area 121 and the second light-transmitting area 122, see Fig.10 ) is blocked by the gas supply bottle 10 and is not visible from the outside (i.e., behind the user), but the first light-transmitting elements 151 and the second light-transmitting elements 152 installed in the first light-transmitting areas and the second light-transmitting areas on the left and right sides of the pressure transmitter 100 are not blocked by the gas supply bottle 10, that is, the light emitted by the pressure indicator light through the first light-transmitting element 151 and the second light-transmitting element 152 is not blocked by the gas supply bottle 10, so that the pressure indicator light is visible from a 180-degree range behind the user.

[0138] In some exemplary embodiments, Fig.16 As shown, the air respirator 300 also includes a mask 11, and the gas supply bottle 10 is configured to provide gas to the mask 11. A display device is installed in the mask 11, and the display device is configured to display the pressure collected by the pressure transmitter 100 of the pressure regulating assembly 200.

[0139] Air respirator 300, reference Figure 8-Figure 14 and Fig.16 , the gas in the gas supply cylinder 10 can be provided to the mask 11 after pressure regulation (such as pressure reduction by the pressure regulating device 4) for use by firefighters. The display device can be a pressure head-up display device, which is arranged in the mask 11 and close to the front of the user's eyes. The information displayed can be observed by the user's eyes, so that the user can easily understand the pressure status of the gas supply cylinder 10 in real time without checking the pressure gauge 6. The pressure transmitter 100 can establish wireless communication with the pressure head-up display device so that the pressure signal collected by the pressure sensor 3 of the pressure transmitter 100 is transmitted to the pressure head-up display device in real time by wireless mode through the communication module. Wireless methods include Bluetooth, RFID, zigbee or NFC. The pressure head-up display device can indicate different pressure values ​​through different display states of the indicator light (for example, the number and / or color of the indicator light). The user can observe the display state of the indicator light in the mask 11 at any time. A partner light indicating pressure can also be set on the pressure head-up display device for the user's companion to see.

[0140] By providing a pressure indicator light visible from the outside on the pressure transmitter 100 of the air respirator 300, and combining it with the indicator light of the pressure head-up display device, two ways of monitoring the pressure in the gas supply cylinder 10 of the air respirator 300 are provided. The pressure indicator light of the pressure transmitter 100 is electrically connected to the control panel of the pressure transmitter 100 by wired connection, while the indicator light of the pressure head-up display device is communicatively connected to the control panel of the pressure transmitter 100 by wireless connection. In the case that one connection mode (such as the wireless connection mode) fails, the other connection mode (such as the wired connection mode) can still effectively provide pressure indication, thereby providing double safety protection for the user of the air respirator 300.

[0141] In summary, compared to some cases, the pressure transmitter is installed on the back plate of the air breathing apparatus and connected to the pressure reducer and the air supply bottle through a long high-pressure pipeline, plus related connectors, which increases the weight of the user of the air breathing apparatus. At the same time, due to the large number of parts, the cost is high and the product stability is not high; the embodiment of the present application has the following beneficial effects:

[0142] 1. A pressure indicator light visible from the outside is provided on the pressure transmitter 100 of the air respirator 300 to show the pressure status in the gas supply cylinder 10 to the user's companions in real time, which is conducive to the user and his companions to remind each other and discover dangerous conditions in time, adding a life safety protection method and improving the safety protection performance of the air respirator 300;

[0143] 2. The pressure transmitter 100 can be arranged in the gap at the bottom of the air breathing apparatus back plate 9 close to the user's back through the three-way connector 5 arranged on the pressure reducing valve, so that the pressure transmitter 100 and the pressure reducing valve can be integrated together, omitting the long high-pressure hose connecting the pressure reducing valve and the pressure transmitter 100, reducing the number of connecting parts, improving the reliability of the connection, making the structure of the air breathing apparatus more compact, and reducing the cost.

[0144] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0145] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme defined by the claims. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0146] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

Claims

1. A voltage regulating assembly, characterized in that: include: A pressure regulating device, the pressure regulating device having an air inlet cavity and an exhaust cavity for exhausting the pressure-regulated gas; A pressure transmitter, the pressure transmitter is mounted and fixed to the pressure regulating device; and A three-way joint, wherein the three-way joint has three interfaces, wherein the first interface of the three-way joint is connected to the fluid of the air inlet chamber of the pressure regulating device, the second interface of the three-way joint is connected to the fluid of the pressure transmitter, and the third interface of the three-way joint is configured to be connected to the fluid of the ventilation pipeline.

2. The voltage regulating assembly according to claim 1, characterized in that: The pressure transmitter has an installation cavity, and the pressure regulating device includes a pressure regulating valve, the valve body of the pressure regulating valve is embedded in the installation cavity of the pressure transmitter.

3. The voltage regulating assembly according to claim 1, characterized in that: The cavity wall of the air inlet cavity is provided with a connection port penetrating the cavity wall, and the connection port is connected to the first interface of the three-way joint through a plug-in fluid.

4. The voltage regulating assembly according to claim 1, characterized in that: The pressure transmitter includes a pressure sensor, and a portion of the pressure sensor extends into the second interface of the three-way connector.

5. The voltage regulating assembly according to claim 1, characterized in that: The pressure regulating device comprises a pressure reducing valve, and the first interface of the three-way joint is fluidically connected to an air inlet cavity of the pressure reducing valve.

6. The voltage regulating assembly according to any one of claims 1 to 5, characterized in that: Also includes: A pressure gauge is provided, and the ventilation line is fluidically connected to the pressure gauge.

7. An air respirator, characterized in that: include: Empty call backboard; A gas supply bottle, which is mounted on the air breathing back plate and has a gas outlet; and The pressure regulating assembly according to any one of claims 1 to 6 is detachably mounted to the air-breathing back plate, and the air inlet chamber of the pressure regulating device of the pressure regulating assembly is fluidly connected to the air outlet of the air supply bottle.

8. A pressure transmitter, characterized in that: include: A housing, wherein the housing has a mounting cavity, the mounting cavity is configured to be mounted and fixed with the voltage regulating device, the mounting cavity is configured so that the housing has a protruding structure protruding outward, the protruding structure has two wing parts inclined relative to each other, and the two wing parts are provided with light-transmitting areas; a pressure sensor, the pressure sensor being accommodated in the housing; and A mounting plate is installed in the housing, and a pressure indicator light for indicating the pressure detected by the pressure sensor is installed on the mounting plate, and the pressure indicator light is configured to emit light and the light can be transmitted from the light-transmitting area.

9. The pressure transmitter according to claim 8, characterized in that: The shell includes a shell body and a mounting portion, wherein the mounting portion is located outside the shell body, and the first end and the second end of the mounting portion, which are oppositely arranged, are connected to the shell body, the mounting portion forms the raised structure, and the two parts of the mounting portion, which are respectively close to the first end and the second end, form the two wing parts, and the mounting cavity is formed between the mounting portion and the shell body.

10. The pressure transmitter according to claim 9, characterized in that: The shell body includes a first shell and a second shell, the first shell and the second shell are fixedly connected and cooperate to form a receiving cavity, the mounting plate and the pressure sensor are installed in the receiving cavity, and the mounting portion is connected to the second shell.

11. The pressure transmitter according to claim 9, characterized in that: A light-transmitting element is installed in the light-transmitting area.

12. The pressure transmitter according to claim 11, characterized in that: The light-transmitting area at least includes a first light-transmitting area and a second light-transmitting area, the first light-transmitting area is close to the first end of the mounting portion connected to the shell body, and the second light-transmitting area is close to the second end of the mounting portion connected to the shell body; and The light-transmitting element at least includes a first light-transmitting element installed in the first light-transmitting area and a second light-transmitting element installed in the second light-transmitting area.

13. The pressure transmitter according to claim 12, characterized in that: The mounting portion is connected to a first end surface of the shell body, and the light emitting surface of the first light-transmitting element and the light emitting surface of the second light-transmitting element are both arranged to be inclined relative to the first end surface.

14. The pressure transmitter according to claim 13, characterized in that: A side of the light emitting surface of the first light-transmitting element away from the first end of the mounting portion is inclined toward a direction away from the shell body and close to the second light-transmitting element, and a side of the light emitting surface of the second light-transmitting element away from the second end of the mounting portion is inclined toward a direction away from the shell body and close to the first light-transmitting element.

15. The pressure transmitter according to claim 14, characterized in that: The light transmission ranges of the first light-transmitting element and the second light-transmitting element partially overlap, and the total light transmission range A of the first light-transmitting element and the second light-transmitting element is set to: A≤180°.

16. The pressure transmitter according to any one of claims 12 to 15, characterized in that: A spacing area is provided between the first light-transmitting area and the second light-transmitting area, and the spacing area is a non-light-transmitting area.

17. The pressure transmitter according to any one of claims 12 to 15, characterized in that: The pressure indicator light includes at least one first pressure indicator light and at least one second pressure indicator light. The first pressure indicator light is configured so that the light it emits can pass through the first light-transmitting element, and the second pressure indicator light is configured so that the light it emits can pass through the second light-transmitting element.

18. The pressure transmitter according to any one of claims 8 to 15, characterized in that: The mounting plate is the electric control board of the pressure transmitter, the pressure sensor and the pressure indicator light are both electrically connected to the electric control board, and the electric control board is configured to control the pressure indicator light to indicate according to the pressure signal detected by the pressure sensor.

19. The pressure transmitter according to claim 18, characterized in that: Also includes: The communication module is installed in the housing and is electrically connected to the electric control board. The electric control board is configured to control the communication module to transmit pressure signals outward.

20. The pressure transmitter according to claim 18, characterized in that: The pressure indicator light has different display states, and the display states include at least one of the on and off state of the pressure indicator light and the color of the pressure indicator light; The electric control board is configured to control the pressure indicator light to display different display states when the pressure detected by the pressure sensor is within different preset ranges.

21. The pressure transmitter according to claim 19 or 20, characterized in that: The electric control board is configured to control the pressure indicator light to display a first color and be always on when the pressure detected by the pressure sensor is within a first preset range; The electric control board is configured to control the pressure indicator light to display a second color and be always on when the pressure detected by the pressure sensor is within a second preset range; The electric control board is configured to control the pressure indicator light to display a third color and alternately light up and off at a preset frequency when the pressure detected by the pressure sensor is within a third preset range; The value of the first preset range is greater than the value of the second preset range, and the value of the second preset range is greater than the value of the third preset range.

22. A voltage regulating assembly, characterized in that: include: The pressure transmitter according to any one of claims 8 to 21; and A pressure regulating device, wherein the pressure regulating device has an air inlet cavity and an exhaust cavity for exhausting the pressure-regulated gas, the installation cavity of the pressure transmitter is configured to install and fix the pressure regulating device, and the pressure sensor of the pressure transmitter is configured to detect the pressure of the air inlet cavity of the pressure regulating device.

23. An air respirator, characterized in that: include: Empty call backboard; A gas supply bottle, which is mounted on the air breathing back plate and has a gas outlet; and The pressure transmitter described in any one of claims 8 to 21 or the pressure regulating assembly described in claim 22 is installed to the air-exhaling back plate, and the gas supply bottle is located outside the raised structure of the shell of the pressure transmitter, and the gas supply bottle passes between the light-transmitting areas set on the two wings of the raised structure.

24. The air respirator according to claim 23, characterized in that: It also includes a mask, the gas supply bottle is configured to provide gas to the mask, a display device is installed in the mask, and the display device is configured to display the pressure collected by the pressure transmitter.

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