Manifold gauges for simultaneous analog and digital displays

Abstract

The present invention provides manifold gauges for diagnosing or servicing a heating, ventilation, air conditioning, or refrigeration system, each including: a manifold; a high-pressure passageway; a low-pressure passageway; a high-pressure valve; a low-pressure valve; a high-pressure gauge configured for reading and displaying high-side pressures in both digital and analog formats simultaneously; a low-pressure gauge configured for reading and displaying low-side pressures in both digital and analog formats simultaneously; and an interface. The manifold gauge may also display temperature data.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims priority to United States Application No. 63 / 717,826, filed on Nov. 7, 2024, the contents of which are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION

[0002] A manifold gauge, also known as a manifold gauge set, is a tool used to measure and control the pressure of refrigerants in heating, ventilation, air conditioning, and refrigeration (HVAC / R) systems. It is an essential device for HVAC technicians and mechanics who work with systems that require precise refrigerant management. A manifold gauge can be used as both a diagnostic and service tool. In diagnostics, a manifold gauge tells an HVAC technician if the system is operating correctly, or if there is a problem within the system that needs to be addressed. When used as a service tool, a manifold gauge can be used to release moisture and sludge, and to remove contaminated refrigerants from the system. It is an important tool for a technician to quickly and accurately get the reading of the pressure of a system in which the manifold gauge is used.

[0003] Currently, manifold gauges are available with either one of two types of readings. One type is an old-fashion analog meter with a scale and needle one endpoint of which pointing to a number in the scale which is typically round and has the look for a vintage watch. The other type is a digital reader showing the pressure only with numbers.

[0004] Both types of reading have disadvantages. For analog (e.g., needle style) reading and display, although it provides an idea where the pressure stands in the scale, it lacks the precision required for today's high-efficiency systems. Conventional analog gauges communicate pressure and temperature through needle movement, offering technicians an intuitive sense of system behavior. However, these gauges lack the accuracy required for modern, energy-efficient HVAC systems, where temperature differences can be less than 1° F.

[0005] On the other hand, for digital reading and display, it shows only a numeral reading of a specific pressure at a specific time, but does not give the technician an idea as to if the pressure is at the lower end or higher end of the allowed capacity. Conventional gauges with digital display can provide precise readings, but eliminate the visual movement that indicates fluctuations and range positioning. As such, they have sacrificed the intuitive visualization of needle movement that helps technicians assess changes quickly.

[0006] To overcome those drawbacks, it is desired to have improved manifold gauges providing both precision digital readings and the visual dynamics of traditional analog gauges at the same time, preferably on a novel high-definition color display.Brief Summary of the Invention

[0007] This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

[0008] The present invention provides a pressure gauge (or meter) containing a display capable of showing the pressure and / or temperature in a digital form and an analog form at the same time. The present invention provides a solution to the issues presented by the conventional types of pressure reader in a manifold gauge. The improved gauges according to the present invention may incorporate a high-definition (HD) color display that can merge numerical accuracy with a visual representation of P / T (Pressure / Temperature) data. This provides clear, real-time insights into system performance, making complex diagnostics simpler and faster. These novel gauges can deliver accuracy with digital reading, real-time visuals, and advanced animations through its innovative graphical user interface (e.g., HD Color Graphic Interface). Also, the gauges according to the present invention may include a rechargeable battery (e.g., lasting up to 100 hours), and / or intuitive one-knob design for easy operation. In particular, fully compatible with A2L refrigerants, they may support multiple (e.g., four or more; or even 72) refrigerants, replacing the need for multiple analog gauges commonly associated with substantial costs in time, space, and money. Due to all the benefits achieved by the claimed invention, products embodying the claimed invention achieved commercial success, including notable market acceptance and financial returns.

[0009] One aspect of the present invention provides a manifold gauge for diagnosing or servicing a heating, ventilation, air conditioning, or refrigeration system, including: (i) a manifold; (ii) a high-pressure passageway and a low-pressure passageway, each in fluid communication with the manifold; (iii) a high-pressure valve for controlling the fluid communication between the high-pressure passageway and the manifold; (iv) a low-pressure valve for controlling the fluid communication between the low-pressure passageway and the manifold; (v) a high-pressure gauge, associated with the high-pressure passageway, and configured for reading a high-side pressure in a high-pressure side of the system and displaying the high-side pressure in both a digital format and an analog format simultaneously; (vi) a low-pressure gauge, associated with the low-pressure passageway, and configured for reading a low-side pressure in a low-pressure side of the system and displaying the low-side pressure in both a digital format and an analog format simultaneously; and (vii) an interface (e.g., HD Color Graphic Interface) configured to convert data into visual display and receive input from a user.

[0010] In some embodiments, the analog format for displaying the high-side pressure or low-side pressure comprises an analog scale using a needle and graduated scale to visually indicate the high-side pressure or low-side pressure.

[0011] In some embodiments, each of the high-pressure gauge and the low-pressure gauge comprises an electronic screen configured for displaying pressure in both the digital format and the analog display. In other words, the manifold gauge has two electronic screens, each capable of displaying pressure and / or temperature in both a digital format and an analog format at the same time.

[0012] In some embodiments, wherein the electronic screen is colored. In some further embodiments, the high-pressure gauge and the low-pressure gauge have distinguishable color displays. For instance, they may have different primary colors, background colors, etc.

[0013] In some embodiments, the manifold gauge is configured to read and display temperatures. In some further embodiments, one electronic screen (e.g., the low-pressure gauge) is configured to display a bubble point temperature; and the other screen (e.g., the high-pressure gauge) is configured to display a dew point temperature.

[0014] In some embodiments, the manifold gauge includes a refrigerant database that contains separate presets for different types of refrigerant, and allows the user to choose the type of refrigerant via the interface. For instance, for each type of the refrigerant, the refrigerant database may include a preset pressure range suitable for said type of refrigerant, thereby allowing the manifold gauge to provide changeable or adjustable analog reading and display for different types of refrigerant.

[0015] In some embodiments, the manifold gauge has multiple refrigerants capability, and is compatible with multiple types of refrigerants. In some embodiments, the manifold gauge may be compatible with four or more refrigerants. In some further embodiments, the manifold gauge may be compatible with 72 or more refrigerants.

[0016] In some embodiments, the interface is configured to allow the user to set parameters.

[0017] In some further embodiments, the during parameter setting, one electronic screen is configured for displaying parameter setting items, and the other electronic screen is configured for simultaneously displaying corresponding parameter setting contents. For instance, the parameters may include refrigerant type, pressure unit, and / or temperature unit.

[0018] In some embodiments, the manifold gauge includes a knob for the user to set parameters. For instance, the manifold gauge may include one-knob design for easy operation.

[0019] In some embodiments, the manifold gauge includes one or more rechargeable batteries.

[0020] In some embodiments, the manifold gauge includes a USB port for charging the manifold gauge.

[0021] As used herein, the term “analog” format or display refers to a display that uses a continuous, variable signal to represent data. Unlike digital displays, which use discrete numerical values, analog displays rely on a continuous scale or movement. For example, an analog format or display includes a needle and a scale with numbers allocated along the peripheral of a display unit.

[0022] As used herein, the term “digital” format or display refers to a display that uses discrete numerical values. For example, a digital format or display shows the pressure only in numbers.

[0023] As used herein, the singular forms “a,”“an” and “the” include plural referents unless the context clearly dictates otherwise.

[0024] As used herein, the terms “include”, “includes” and “including” are meant to be non-limiting.

[0025] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and / or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all Markush groups used in the appended claims.

[0026] Unless otherwise defined herein, scientific and technical terms used in connection with the present application shall have the meanings that are commonly understood by those of ordinary skill in the art to which this disclosure belongs. It should be understood that this invention is not limited to the particular methodology, protocols, and reagents, etc., described herein and as such can vary. Other terms are defined herein within the description of the various aspects of the invention.BRIEF DESCRIPTIONS OF THE FIGURES

[0027] The following drawings illustrate by way of example and not limitation. For the sake of brevity and clarity, every feature of a given structure is not always labeled in every figure in which that structure appears. Identical reference numbers do not necessarily indicate an identical structure. Rather, the same reference number may be used to indicate a similar feature or a feature with similar functionality, as may non-identical reference numbers.

[0028] FIG. 1 shows an exemplary manifold gauge according to one embodiment of the present invention.

[0029] FIG. 2 illustrates a front left-angled view of the manifold gauge in FIG. 1.

[0030] FIG. 3 illustrates a back right-angled view of manifold gauge in FIG. 1.

[0031] FIG. 4 shows an exemplary main interface according to one embodiment of the present invention.

[0032] FIG. 5 shows an exemplary parameter setting interface according to one embodiment of the present invention.DETAILED DESCRIPTION OF THE INVENTION

[0033] Reference will now be made in detail to the preferred embodiments of the invention, examples of which are further illustrated. While the invention will be described in conjunction with the preferred embodiments, it will be understood that they are not intended to limit the invention to these embodiments. To the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the claims. Furthermore, in the detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be obvious to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well known methods, procedures, components, and other features have not been described in detail as not to unnecessarily obscure aspects of the present invention.

[0034] Generally speaking, various embodiments of the present invention provide for pressure gauges (or meters) which provide simultaneous analog and digital display for pressures (e.g., high pressure and low pressure) and / or temperatures. Particularly, the pressure gauges may incorporate a high-definition (HD) color display and / or HD graphic interface that can merge numerical accuracy with a visual representation of P / T (Pressure / Temperature) data. Also, the gauges according to the present invention may include a rechargeable battery (e.g., lasting up to 100 hours), and / or intuitive one-knob design for easy operation. In particular, fully compatible with A2L refrigerants, they may support 72 refrigerants, replacing the need for multiple analog gauges commonly associated with substantial costs in time, space, and money. Additional features may include a durable aluminum body, IP54 impact-resistant rubber cover, and / or a foldable hook, ensuring reliability and portability.

[0035] For decades, HVAC technicians have relied on analog manifold gauges to measure pressure and temperature. While these traditional tools provide useful data, they lack the precision required for today's high-efficiency systems. Gauges with digital display have improved accuracy, but have sacrificed the intuitive visualization of needle movement that helps technicians assess changes quickly. The novel manifold gauge technology according to present invention is able to blend the best of both worlds—precision digital readings with the visual dynamics of traditional analog gauges—e.g., all on a high-definition color display. The present invention achieved s a number of advantage.

[0036] First, the present invention provides a revolutionizing pressure and temperature (P / T) measurement. Researches have shown that over 80% of all information is absorbed visually. Analog gauges communicate pressure and temperature through needle movement, offering technicians an intuitive sense of system behavior. However, these gauges lack the accuracy required for modern, energy-efficient HVAC systems, where temperature differences can be less than 1° F. On the other hand, gauges with digital display provide precise readings but eliminate the visual movement that indicates fluctuations and range positioning. The present invention provides a revolutionizing solution by incorporating an HD color display that merges numerical accuracy with a visual representation of P / T data. This provides clear, real-time insights into system performance, making complex diagnostics simpler and faster.

[0037] Second, the present invention provides a single manifold gauge set (with both analog and digital display) compatible with a great number (e.g., 72) of refrigerant types, thereby achieving big savings and maximum convenience. Traditionally, each refrigerant requires a dedicated manifold gauge dial (particularly for analog reading), forcing technicians to carry multiple tools. With hundreds of refrigerants in the market, this results in excessive costs, cluttered toolkits, and wasted time switching between gauges. The present invention solves this issue with manifold gauges capable of displaying 72 refrigerants in both analog and digital formats in one device. Technicians can simply select the refrigerant, and the gauge automatically adjusts to suitable preset to show the corresponding P / T data with pinpoint accuracy. This innovation reduces the need to purchase multiple analog gauges (e.g., each may cost $80-$180), thereby making the present invention a cost-effective solution while optimizing efficiency and reducing truck space.

[0038] Third, the present invention provides cutting edge UI / UX for intuitive operation. The manifold gauge according to the present invention is designed for ease of use, for either a seasoned technician or an apprentice learning the trade. For instance, with two electronic screen displays, a single on / off button, and / or a turn / press knob, navigating settings are simple and easy for operation. Users can seamlessly scroll through refrigerant options, change units, and / or adjust system settings with minimal effort. The interface is designed to reduce distractions and enhance workflow, ensuring technicians spend more time servicing systems and less time interpreting confusing data.

[0039] Fourth, the present invention bridges the gap between old-school gauges and advanced digital manifold gauges. Interpreting thermodynamic data in sealed systems has long been a challenge as we are determining “invisible” heat hidden in the refrigeration cycle. To bring more visibility to this process, many technicians have moved from traditional analog gauges that only measure P / T to advanced manifold gauges equipped with temperature clamps. However, these modern tools come with a significant cost and often introduce cluttered screens filled with raw numbers, making quick interpretation difficult. What's more, not every situation demands such an advanced system—there are still countless scenarios where a simple, reliable set of gauges is essential. The prevent invention bridges this gap. It replaces multiple sets of analog gauges with a crisp, high-contrast digital display while maintaining the clarity and ease of interpretation that technicians need. When an advanced gauge is unnecessary, the present invention delivers a streamlined, intuitive solution—offering precision without the complexity.

[0040] As such, by integrating advanced technology with intuitive usability, the present invention empowers professionals to diagnose and service HVAC systems more efficiently, delivering improved performance, accuracy, and convenience.

[0041] The invention is further elucidated with specific examples. It is understood that these examples are only used to describe the invention but not intended to limit the scope of invention. The experimental methods with no specific conditions in the following examples, are usually prepared under conventional conditions in literature or according to the conditions suggested by the excipient manufacturer. Unless specifically stated, all percentages, ratios, proportions, or fractions in this invention are calculated by weight by weight. Unless specifically defined in this invention, all professional and scientific terms used herein have the same meaning as well-trained personnel may be familiar with. In addition, any methods and materials similar or equivalent to those recorded in this invention can be applied to this invention. The preferred embodiments and materials described herein are used only for exemplary purposes.

[0042] FIGS. 1-3 shows an overview of an exemplary manifold gauge 100. As shown in FIG. 1, manifold gauge 100 includes low-pressure gauge 102, high-pressure gauge 104, low-pressure valve 106, high-pressure valve 108, low-pressure passageway 110, high-pressure passageway 112, center passageway 114. The passageways are in fluid communication with manifold 116. Low-pressure gauge 102 is associated with low-pressure passageway 110, which is to be connected and measure a low-side pressure value of the low-pressure side of a VAHC system to be tested. Low-pressure valve 108 controls the communication between low-pressure passageway 110 and manifold 116. High-pressure gauge 106 is associated with high-pressure passageway 112, which is to be connected to measure a high-side pressure value of the high-pressure side of the system to be tested. High-pressure valve 106 controls the communication between high-pressure passageway 112 and manifold 116. The manifold gauge may also include a liquid sight glass indicating the liquid presence in the manifold.

[0043] As shown in FIG. 2, manifold gauge 100 includes a power button 118 on one side. As an example, the user may press and hold the power button for more than 2 seconds to turn on the device. When the device is on, the user may press and hold the power button for more than 2 seconds to turn it off. The manifold gauge may also include auto shutdown function and / or auto screen off function.

[0044] As shown in FIG. 3, manifold gauge 100 includes a knob 120 on the other side. A user may use the knob 120 to select and set parameters via HD graphic interface. In some embodiments, the manifold gauges according to the present invention have one-knob design, providing simplified and easy operation for users. Manifold gauge 100 also includes a hook 122, foldable on the back of the gauge. On the top side, manifold gauge 100 includes a USB port 124 for easy charging. The manifold gauge may include a rechargeable battery (e.g., inside the back side of the gauge).

[0045] FIG. 4 shows an exemplary main interface. As shown in FIG. 4, low-pressure gauge 102 is capable of providing analog and digital display for the measured low-side pressures at the same time. More specifically, low-pressure gauge 102 displays pressure value in a digital format (number 126), as well as in an analog format (with needle 128 and scale 130) at the same time. Low-pressure gauge 102 also displays temperature (e.g., bubble point temperature 132), pressure unit 134, and refrigerant type 136.

[0046] Similarly, high-pressure gauge 104 is capable of providing analog and digital display for the measured high-side pressures at the same time. More specifically, high-pressure gauge 104 displays pressure value in a digital format (number 138), as well as in an analog format (with needle 140 and scale 142) at the same time. High-pressure gauge 104 also displays temperature (e.g., dew point temperature 144), pressure unit 146, and refrigerant type 148.

[0047] In some embodiments, the manifold gauge provides pressure wheel display. For instance, When a pressure value is greater than 0, both the needle and the pressure bar point upward. When a pressure value is less than 0, both the needle and the pressure bar point downward. A pressure bar is an area between a needle and the zero in the scale. It creates a persistently illuminated trail visually highlighting the needle's movement and indicating the range it has swept. The users can quickly assess the extent of the movement and the current status at a glance. In some embodiment, the manifold gauge has failure alarm when the pressure or temperature sensor fails.

[0048] Parameters such as pressure unit, temperature unit, and refrigerant type can be set or changed by the user via parameter setting interface further described below.

[0049] FIG. 5 shows an exemplary parameter setting interface. The user may clock the knob 120 to enter the parameter setting interface. As shown in FIG. 5, the left screen displays parameter setting item 150 (e.g., refrigerant type, pressure units, temperature units) and the right screen displays parameter setting content 152. For instance, the manifold gauge may include a refrigerant database including separate presets for different type of refrigerants. In some embodiments, the manifold gauge is compatible with 72 refrigerants.

[0050] For instance, the refrigerants types are: R-11, R-12, R-13, R-22, R-23, R-32, R-113, R-114, R-115, R-116, R-123, R-124, R-125, R134a, R-236fa, R-245fa, R-290, R-401A, R-401B, R-402A, R-402B, R-403B, R-404A, R-406A, R-407A, R-407B, R-407C, R-408A, R-409A, R-410A, R-413A, R-414A, R-414B, R-416A, R-417A, R-417C, R-420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-427A, R-428A, R-434A, R-437A, R-438A, R-448A, R-449A, R-450A, R-452A, R-452B, R-453A, R-454B, R-458A, R-500, R-501, R-502, R-503, R-507A, R-508B, R-513A, R-600, R-600a, R-601, R-601a, R-744*, R-1233zd, R-1234yf, R-1234ze.

[0051] For parameter setting interface, the user may scroll knob 120 up or down, in order to scroll the parameter setting item upward or downward in a circular motion. The parameter setting contents on the right screen correspond to the selected option on the left screen. The user may clock the knob to select parameter item, and / or confirm the selected parameter content. The user may click the power button to return to the main interface.

[0052] Accordingly, the manifold gauges according to the present invention can deliver accuracy with digital reading, real-time visuals, and advanced animations through its innovative graphical user interface (e.g., HD Color Graphic Interface).

[0053] Although specific embodiments and examples of this invention have been illustrated herein, it will be appreciated by those skilled in the art that any modifications and variations can be made without departing from the spirit of the invention. The examples and illustrations above are not intended to limit the scope of this invention. Any combination of embodiments of this invention, along with any obvious their extension or analogs, are within the scope of this invention. Further, it is intended that this invention encompass any arrangement, which is calculated to achieve that same purpose, and all such variations and modifications as fall within the scope of the appended claims.

[0054] All the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example of a generic series of equivalent or similar features.

Examples

Embodiment Construction

[0033]Reference will now be made in detail to the preferred embodiments of the invention, examples of which are further illustrated. While the invention will be described in conjunction with the preferred embodiments, it will be understood that they are not intended to limit the invention to these embodiments. To the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the claims. Furthermore, in the detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be obvious to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well known methods, procedures, components, and other features have not been described in detail as not to unnecessarily obscure aspects of the present inven...

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims priority to United States Application No. 63 / 717,826, filed on Nov. 7, 2024, the contents of which are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION

[0002] A manifold gauge, also known as a manifold gauge set, is a tool used to measure and control the pressure of refrigerants in heating, ventilation, air conditioning, and refrigeration (HVAC / R) systems. It is an essential device for HVAC technicians and mechanics who work with systems that require precise refrigerant management. A manifold gauge can be used as both a diagnostic and service tool. In diagnostics, a manifold gauge tells an HVAC technician if the system is operating correctly, or if there is a problem within the system that needs to be addressed. When used as a service tool, a manifold gauge can be used to release moisture and sludge, and to remove contaminated refrigerants from the system. It is an important tool for a technician to quickly and accurately get the reading of the pressure of a system in which the manifold gauge is used.

[0003] Currently, manifold gauges are available with either one of two types of readings. One type is an old-fashion analog meter with a scale and needle one endpoint of which pointing to a number in the scale which is typically round and has the look for a vintage watch. The other type is a digital reader showing the pressure only with numbers.

[0004] Both types of reading have disadvantages. For analog (e.g., needle style) reading and display, although it provides an idea where the pressure stands in the scale, it lacks the precision required for today's high-efficiency systems. Conventional analog gauges communicate pressure and temperature through needle movement, offering technicians an intuitive sense of system behavior. However, these gauges lack the accuracy required for modern, energy-efficient HVAC systems, where temperature differences can be less than 1° F.

[0005] On the other hand, for digital reading and display, it shows only a numeral reading of a specific pressure at a specific time, but does not give the technician an idea as to if the pressure is at the lower end or higher end of the allowed capacity. Conventional gauges with digital display can provide precise readings, but eliminate the visual movement that indicates fluctuations and range positioning. As such, they have sacrificed the intuitive visualization of needle movement that helps technicians assess changes quickly.

[0006] To overcome those drawbacks, it is desired to have improved manifold gauges providing both precision digital readings and the visual dynamics of traditional analog gauges at the same time, preferably on a novel high-definition color display.Brief Summary of the Invention

[0007] This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

[0008] The present invention provides a pressure gauge (or meter) containing a display capable of showing the pressure and / or temperature in a digital form and an analog form at the same time. The present invention provides a solution to the issues presented by the conventional types of pressure reader in a manifold gauge. The improved gauges according to the present invention may incorporate a high-definition (HD) color display that can merge numerical accuracy with a visual representation of P / T (Pressure / Temperature) data. This provides clear, real-time insights into system performance, making complex diagnostics simpler and faster. These novel gauges can deliver accuracy with digital reading, real-time visuals, and advanced animations through its innovative graphical user interface (e.g., HD Color Graphic Interface). Also, the gauges according to the present invention may include a rechargeable battery (e.g., lasting up to 100 hours), and / or intuitive one-knob design for easy operation. In particular, fully compatible with A2L refrigerants, they may support multiple (e.g., four or more; or even 72) refrigerants, replacing the need for multiple analog gauges commonly associated with substantial costs in time, space, and money. Due to all the benefits achieved by the claimed invention, products embodying the claimed invention achieved commercial success, including notable market acceptance and financial returns.

[0009] One aspect of the present invention provides a manifold gauge for diagnosing or servicing a heating, ventilation, air conditioning, or refrigeration system, including: (i) a manifold; (ii) a high-pressure passageway and a low-pressure passageway, each in fluid communication with the manifold; (iii) a high-pressure valve for controlling the fluid communication between the high-pressure passageway and the manifold; (iv) a low-pressure valve for controlling the fluid communication between the low-pressure passageway and the manifold; (v) a high-pressure gauge, associated with the high-pressure passageway, and configured for reading a high-side pressure in a high-pressure side of the system and displaying the high-side pressure in both a digital format and an analog format simultaneously; (vi) a low-pressure gauge, associated with the low-pressure passageway, and configured for reading a low-side pressure in a low-pressure side of the system and displaying the low-side pressure in both a digital format and an analog format simultaneously; and (vii) an interface (e.g., HD Color Graphic Interface) configured to convert data into visual display and receive input from a user.

[0010] In some embodiments, the analog format for displaying the high-side pressure or low-side pressure comprises an analog scale using a needle and graduated scale to visually indicate the high-side pressure or low-side pressure.

[0011] In some embodiments, each of the high-pressure gauge and the low-pressure gauge comprises an electronic screen configured for displaying pressure in both the digital format and the analog display. In other words, the manifold gauge has two electronic screens, each capable of displaying pressure and / or temperature in both a digital format and an analog format at the same time.

[0012] In some embodiments, wherein the electronic screen is colored. In some further embodiments, the high-pressure gauge and the low-pressure gauge have distinguishable color displays. For instance, they may have different primary colors, background colors, etc.

[0013] In some embodiments, the manifold gauge is configured to read and display temperatures. In some further embodiments, one electronic screen (e.g., the low-pressure gauge) is configured to display a bubble point temperature; and the other screen (e.g., the high-pressure gauge) is configured to display a dew point temperature.

[0014] In some embodiments, the manifold gauge includes a refrigerant database that contains separate presets for different types of refrigerant, and allows the user to choose the type of refrigerant via the interface. For instance, for each type of the refrigerant, the refrigerant database may include a preset pressure range suitable for said type of refrigerant, thereby allowing the manifold gauge to provide changeable or adjustable analog reading and display for different types of refrigerant.

[0015] In some embodiments, the manifold gauge has multiple refrigerants capability, and is compatible with multiple types of refrigerants. In some embodiments, the manifold gauge may be compatible with four or more refrigerants. In some further embodiments, the manifold gauge may be compatible with 72 or more refrigerants.

[0016] In some embodiments, the interface is configured to allow the user to set parameters.

[0017] In some further embodiments, the during parameter setting, one electronic screen is configured for displaying parameter setting items, and the other electronic screen is configured for simultaneously displaying corresponding parameter setting contents. For instance, the parameters may include refrigerant type, pressure unit, and / or temperature unit.

[0018] In some embodiments, the manifold gauge includes a knob for the user to set parameters. For instance, the manifold gauge may include one-knob design for easy operation.

[0019] In some embodiments, the manifold gauge includes one or more rechargeable batteries.

[0020] In some embodiments, the manifold gauge includes a USB port for charging the manifold gauge.

[0021] As used herein, the term “analog” format or display refers to a display that uses a continuous, variable signal to represent data. Unlike digital displays, which use discrete numerical values, analog displays rely on a continuous scale or movement. For example, an analog format or display includes a needle and a scale with numbers allocated along the peripheral of a display unit.

[0022] As used herein, the term “digital” format or display refers to a display that uses discrete numerical values. For example, a digital format or display shows the pressure only in numbers.

[0023] As used herein, the singular forms “a,”“an” and “the” include plural referents unless the context clearly dictates otherwise.

[0024] As used herein, the terms “include”, “includes” and “including” are meant to be non-limiting.

[0025] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and / or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all Markush groups used in the appended claims.

[0026] Unless otherwise defined herein, scientific and technical terms used in connection with the present application shall have the meanings that are commonly understood by those of ordinary skill in the art to which this disclosure belongs. It should be understood that this invention is not limited to the particular methodology, protocols, and reagents, etc., described herein and as such can vary. Other terms are defined herein within the description of the various aspects of the invention.BRIEF DESCRIPTIONS OF THE FIGURES

[0027] The following drawings illustrate by way of example and not limitation. For the sake of brevity and clarity, every feature of a given structure is not always labeled in every figure in which that structure appears. Identical reference numbers do not necessarily indicate an identical structure. Rather, the same reference number may be used to indicate a similar feature or a feature with similar functionality, as may non-identical reference numbers.

[0028] FIG. 1 shows an exemplary manifold gauge according to one embodiment of the present invention.

[0029] FIG. 2 illustrates a front left-angled view of the manifold gauge in FIG. 1.

[0030] FIG. 3 illustrates a back right-angled view of manifold gauge in FIG. 1.

[0031] FIG. 4 shows an exemplary main interface according to one embodiment of the present invention.

[0032] FIG. 5 shows an exemplary parameter setting interface according to one embodiment of the present invention.DETAILED DESCRIPTION OF THE INVENTION

[0033] Reference will now be made in detail to the preferred embodiments of the invention, examples of which are further illustrated. While the invention will be described in conjunction with the preferred embodiments, it will be understood that they are not intended to limit the invention to these embodiments. To the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the claims. Furthermore, in the detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be obvious to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well known methods, procedures, components, and other features have not been described in detail as not to unnecessarily obscure aspects of the present invention.

[0034] Generally speaking, various embodiments of the present invention provide for pressure gauges (or meters) which provide simultaneous analog and digital display for pressures (e.g., high pressure and low pressure) and / or temperatures. Particularly, the pressure gauges may incorporate a high-definition (HD) color display and / or HD graphic interface that can merge numerical accuracy with a visual representation of P / T (Pressure / Temperature) data. Also, the gauges according to the present invention may include a rechargeable battery (e.g., lasting up to 100 hours), and / or intuitive one-knob design for easy operation. In particular, fully compatible with A2L refrigerants, they may support 72 refrigerants, replacing the need for multiple analog gauges commonly associated with substantial costs in time, space, and money. Additional features may include a durable aluminum body, IP54 impact-resistant rubber cover, and / or a foldable hook, ensuring reliability and portability.

[0035] For decades, HVAC technicians have relied on analog manifold gauges to measure pressure and temperature. While these traditional tools provide useful data, they lack the precision required for today's high-efficiency systems. Gauges with digital display have improved accuracy, but have sacrificed the intuitive visualization of needle movement that helps technicians assess changes quickly. The novel manifold gauge technology according to present invention is able to blend the best of both worlds—precision digital readings with the visual dynamics of traditional analog gauges—e.g., all on a high-definition color display. The present invention achieved s a number of advantage.

[0036] First, the present invention provides a revolutionizing pressure and temperature (P / T) measurement. Researches have shown that over 80% of all information is absorbed visually. Analog gauges communicate pressure and temperature through needle movement, offering technicians an intuitive sense of system behavior. However, these gauges lack the accuracy required for modern, energy-efficient HVAC systems, where temperature differences can be less than 1° F. On the other hand, gauges with digital display provide precise readings but eliminate the visual movement that indicates fluctuations and range positioning. The present invention provides a revolutionizing solution by incorporating an HD color display that merges numerical accuracy with a visual representation of P / T data. This provides clear, real-time insights into system performance, making complex diagnostics simpler and faster.

[0037] Second, the present invention provides a single manifold gauge set (with both analog and digital display) compatible with a great number (e.g., 72) of refrigerant types, thereby achieving big savings and maximum convenience. Traditionally, each refrigerant requires a dedicated manifold gauge dial (particularly for analog reading), forcing technicians to carry multiple tools. With hundreds of refrigerants in the market, this results in excessive costs, cluttered toolkits, and wasted time switching between gauges. The present invention solves this issue with manifold gauges capable of displaying 72 refrigerants in both analog and digital formats in one device. Technicians can simply select the refrigerant, and the gauge automatically adjusts to suitable preset to show the corresponding P / T data with pinpoint accuracy. This innovation reduces the need to purchase multiple analog gauges (e.g., each may cost $80-$180), thereby making the present invention a cost-effective solution while optimizing efficiency and reducing truck space.

[0038] Third, the present invention provides cutting edge UI / UX for intuitive operation. The manifold gauge according to the present invention is designed for ease of use, for either a seasoned technician or an apprentice learning the trade. For instance, with two electronic screen displays, a single on / off button, and / or a turn / press knob, navigating settings are simple and easy for operation. Users can seamlessly scroll through refrigerant options, change units, and / or adjust system settings with minimal effort. The interface is designed to reduce distractions and enhance workflow, ensuring technicians spend more time servicing systems and less time interpreting confusing data.

[0039] Fourth, the present invention bridges the gap between old-school gauges and advanced digital manifold gauges. Interpreting thermodynamic data in sealed systems has long been a challenge as we are determining “invisible” heat hidden in the refrigeration cycle. To bring more visibility to this process, many technicians have moved from traditional analog gauges that only measure P / T to advanced manifold gauges equipped with temperature clamps. However, these modern tools come with a significant cost and often introduce cluttered screens filled with raw numbers, making quick interpretation difficult. What's more, not every situation demands such an advanced system—there are still countless scenarios where a simple, reliable set of gauges is essential. The prevent invention bridges this gap. It replaces multiple sets of analog gauges with a crisp, high-contrast digital display while maintaining the clarity and ease of interpretation that technicians need. When an advanced gauge is unnecessary, the present invention delivers a streamlined, intuitive solution—offering precision without the complexity.

[0040] As such, by integrating advanced technology with intuitive usability, the present invention empowers professionals to diagnose and service HVAC systems more efficiently, delivering improved performance, accuracy, and convenience.

[0041] The invention is further elucidated with specific examples. It is understood that these examples are only used to describe the invention but not intended to limit the scope of invention. The experimental methods with no specific conditions in the following examples, are usually prepared under conventional conditions in literature or according to the conditions suggested by the excipient manufacturer. Unless specifically stated, all percentages, ratios, proportions, or fractions in this invention are calculated by weight by weight. Unless specifically defined in this invention, all professional and scientific terms used herein have the same meaning as well-trained personnel may be familiar with. In addition, any methods and materials similar or equivalent to those recorded in this invention can be applied to this invention. The preferred embodiments and materials described herein are used only for exemplary purposes.

[0042] FIGS. 1-3 shows an overview of an exemplary manifold gauge 100. As shown in FIG. 1, manifold gauge 100 includes low-pressure gauge 102, high-pressure gauge 104, low-pressure valve 106, high-pressure valve 108, low-pressure passageway 110, high-pressure passageway 112, center passageway 114. The passageways are in fluid communication with manifold 116. Low-pressure gauge 102 is associated with low-pressure passageway 110, which is to be connected and measure a low-side pressure value of the low-pressure side of a VAHC system to be tested. Low-pressure valve 108 controls the communication between low-pressure passageway 110 and manifold 116. High-pressure gauge 106 is associated with high-pressure passageway 112, which is to be connected to measure a high-side pressure value of the high-pressure side of the system to be tested. High-pressure valve 106 controls the communication between high-pressure passageway 112 and manifold 116. The manifold gauge may also include a liquid sight glass indicating the liquid presence in the manifold.

[0043] As shown in FIG. 2, manifold gauge 100 includes a power button 118 on one side. As an example, the user may press and hold the power button for more than 2 seconds to turn on the device. When the device is on, the user may press and hold the power button for more than 2 seconds to turn it off. The manifold gauge may also include auto shutdown function and / or auto screen off function.

[0044] As shown in FIG. 3, manifold gauge 100 includes a knob 120 on the other side. A user may use the knob 120 to select and set parameters via HD graphic interface. In some embodiments, the manifold gauges according to the present invention have one-knob design, providing simplified and easy operation for users. Manifold gauge 100 also includes a hook 122, foldable on the back of the gauge. On the top side, manifold gauge 100 includes a USB port 124 for easy charging. The manifold gauge may include a rechargeable battery (e.g., inside the back side of the gauge).

[0045] FIG. 4 shows an exemplary main interface. As shown in FIG. 4, low-pressure gauge 102 is capable of providing analog and digital display for the measured low-side pressures at the same time. More specifically, low-pressure gauge 102 displays pressure value in a digital format (number 126), as well as in an analog format (with needle 128 and scale 130) at the same time. Low-pressure gauge 102 also displays temperature (e.g., bubble point temperature 132), pressure unit 134, and refrigerant type 136.

[0046] Similarly, high-pressure gauge 104 is capable of providing analog and digital display for the measured high-side pressures at the same time. More specifically, high-pressure gauge 104 displays pressure value in a digital format (number 138), as well as in an analog format (with needle 140 and scale 142) at the same time. High-pressure gauge 104 also displays temperature (e.g., dew point temperature 144), pressure unit 146, and refrigerant type 148.

[0047] In some embodiments, the manifold gauge provides pressure wheel display. For instance, When a pressure value is greater than 0, both the needle and the pressure bar point upward. When a pressure value is less than 0, both the needle and the pressure bar point downward. A pressure bar is an area between a needle and the zero in the scale. It creates a persistently illuminated trail visually highlighting the needle's movement and indicating the range it has swept. The users can quickly assess the extent of the movement and the current status at a glance. In some embodiment, the manifold gauge has failure alarm when the pressure or temperature sensor fails.

[0048] Parameters such as pressure unit, temperature unit, and refrigerant type can be set or changed by the user via parameter setting interface further described below.

[0049] FIG. 5 shows an exemplary parameter setting interface. The user may clock the knob 120 to enter the parameter setting interface. As shown in FIG. 5, the left screen displays parameter setting item 150 (e.g., refrigerant type, pressure units, temperature units) and the right screen displays parameter setting content 152. For instance, the manifold gauge may include a refrigerant database including separate presets for different type of refrigerants. In some embodiments, the manifold gauge is compatible with 72 refrigerants.

[0050] For instance, the refrigerants types are: R-11, R-12, R-13, R-22, R-23, R-32, R-113, R-114, R-115, R-116, R-123, R-124, R-125, R134a, R-236fa, R-245fa, R-290, R-401A, R-401B, R-402A, R-402B, R-403B, R-404A, R-406A, R-407A, R-407B, R-407C, R-408A, R-409A, R-410A, R-413A, R-414A, R-414B, R-416A, R-417A, R-417C, R-420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-427A, R-428A, R-434A, R-437A, R-438A, R-448A, R-449A, R-450A, R-452A, R-452B, R-453A, R-454B, R-458A, R-500, R-501, R-502, R-503, R-507A, R-508B, R-513A, R-600, R-600a, R-601, R-601a, R-744*, R-1233zd, R-1234yf, R-1234ze.

[0051] For parameter setting interface, the user may scroll knob 120 up or down, in order to scroll the parameter setting item upward or downward in a circular motion. The parameter setting contents on the right screen correspond to the selected option on the left screen. The user may clock the knob to select parameter item, and / or confirm the selected parameter content. The user may click the power button to return to the main interface.

[0052] Accordingly, the manifold gauges according to the present invention can deliver accuracy with digital reading, real-time visuals, and advanced animations through its innovative graphical user interface (e.g., HD Color Graphic Interface).

[0053] Although specific embodiments and examples of this invention have been illustrated herein, it will be appreciated by those skilled in the art that any modifications and variations can be made without departing from the spirit of the invention. The examples and illustrations above are not intended to limit the scope of this invention. Any combination of embodiments of this invention, along with any obvious their extension or analogs, are within the scope of this invention. Further, it is intended that this invention encompass any arrangement, which is calculated to achieve that same purpose, and all such variations and modifications as fall within the scope of the appended claims.

[0054] All the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example of a generic series of equivalent or similar features.

Examples

Embodiment Construction

[0033]Reference will now be made in detail to the preferred embodiments of the invention, examples of which are further illustrated. While the invention will be described in conjunction with the preferred embodiments, it will be understood that they are not intended to limit the invention to these embodiments. To the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the claims. Furthermore, in the detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be obvious to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well known methods, procedures, components, and other features have not been described in detail as not to unnecessarily obscure aspects of the present inven...

Claims

1. A manifold gauge for diagnosing or servicing a heating, ventilation, air conditioning, or refrigeration system, comprising:a) a manifold;b) a high-pressure passageway and a low-pressure passageway, each in fluid communication with the manifold;c) a high-pressure valve for controlling the fluid communication between the high-pressure passageway and the manifold;d) a low-pressure valve for controlling the fluid communication between the low-pressure passageway and the manifold;e) a high-pressure gauge, associated with the high-pressure passageway, and configured for reading a high-side pressure in a high-pressure side of the system and displaying the high-side pressure in both a digital format and an analog format simultaneously;f) a low-pressure gauge, associated with the low-pressure passageway, and configured for reading a low-side pressure in a low-pressure side of the system and displaying the low-side pressure in both a digital format and an analog format simultaneously; andg) an interface configured to convert data into visual display and receive input from a user.

2. The manifold gauge of claim 1, wherein the analog format for displaying the high-side pressure or low-side pressure comprises an analog scale using a needle and graduated scale to visually indicate the high-side pressure or low-side pressure.

3. The manifold gauge of claim 1, wherein each of the high-pressure gauge and the low-pressure gauge comprises an electronic screen configured for displaying pressure in both the digital format and the analog display.

4. The manifold gauge of claim 1, wherein the electronic screen is colored.

5. The manifold gauge of claim 4, wherein the high-pressure gauge and the low-pressure gauge have distinguishable color displays.

6. The manifold gauge of claim 1, wherein the manifold gauge is configured to read and display temperatures.

7. The manifold gauge of claim 6, wherein the low-pressure gauge is configured to display a bubble point temperature; and the high-pressure gauge is configured to display a dew point temperature.

8. The manifold gauge of claim 1, further comprising a refrigerant database that comprises separate presets for different types of refrigerant, and allows the user to choose the type of refrigerant via the interface.

9. The manifold gauge of claim 8, wherein for each type of the refrigerant, the refrigerant database comprises a preset pressure range suitable for said type of refrigerant, thereby allowing the manifold gauge to provide changeable analog reading and display for different types of refrigerant.

10. The manifold gauge of claim 9, wherein the manifold gauge is compatible with four or more types of refrigerants.

11. The manifold gauge of claim 1, wherein the interface is configured to allow the user to set parameters.

12. The manifold gauge of claim 11, wherein during parameter setting, one electronic screen is configured for displaying parameter setting items, and the other electronic screen is configured for simultaneously displaying corresponding parameter setting contents.

13. The manifold gauge of claim 11, wherein the parameters comprise refrigerant type, pressure unit, or temperature unit.

14. The manifold gauge of claim 11, further comprising a knob for the user to set parameters.

15. The manifold gauge of claim 1, further comprising a rechargeable battery.

16. The manifold gauge of claim 1, further comprising a USB port for charging the manifold gauge.

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