CN-121988095-A - Differential pressure sensor and monitor for measuring filter health

Abstract

Systems, devices, and methods for filter health sensors are provided. The filter health sensor includes a first pressure port and a second pressure port located on the housing and configured to enter an upstream side and a downstream side of the filter, respectively. The pressure transducer is configured to measure a pressure differential between the upstream side of the filter and the downstream side of the filter. A color changing indicator is located on the front side of the housing to emit three different colors. The control unit is configured to cause three different colors to be emitted from the color changing indicator, the three different colors indicating normal filter operation, a warning that the filter should be replaced as soon as possible, or a warning that the filter should be replaced immediately.

Inventors

• B. KNUDSEN

Assignees

• 塞特拉系统有限责任公司

Dates

Publication Date

20260508

Application Date

20251031

Priority Date

20241101

Claims (19)

1. 1. A filter health sensor, the filter health sensor comprising: A housing; A first pressure port on the housing, the first pressure port configured to enter an upstream side of a filter; A second pressure port on the housing, the second pressure port configured to enter a downstream side of the filter; A pressure transducer located within the housing, the pressure transducer configured to measure a pressure differential between the upstream side of the filter and the downstream side of the filter; a color changing indicator on a front side of the housing opposite a rear side of the housing, the color changing indicator configured to emit three different colors, and A control unit coupled to the pressure transducer and the color changing indicator, the control unit configured to: Responsive to determining that the measured differential pressure is below both a first threshold and a second threshold, causing a first color to be emitted from the color changing indicator, the first color being indicative of a normal filter operating condition; in response to determining that the measured differential pressure is above the first threshold and below the second threshold, causing a second color to be emitted from the color changing indicator, the second color indicating a warning that the filter should be replaced as soon as possible, and In response to determining that the measured differential pressure is above the first threshold and above the second threshold, a third color is emitted from the color changing indicator, the third color indicating a warning that the filter should be replaced immediately.
2. 2. The filter health sensor of claim 1, wherein the first color is green, wherein the second color is yellow, and wherein the third color is red.
3. 3. The filter health sensor of claim 1, wherein the color changing indicator is a color changing light ring.
4. 4. The filter health sensor of claim 3, further comprising a display screen located on the front side of the housing and within the color-changing light ring, the display screen configured to display the measured pressure differential.
5. 5. The filter health sensor of claim 1, wherein the control unit is a microprocessor.
6. 6. The filter health sensor of claim 1, wherein the control unit is further configured to receive the first threshold and the second threshold from user input.
7. 7. A method, the method comprising: Entering an upstream side of the filter via a first pressure port located on the housing; Entering a downstream side of the filter via a second pressure port located on the housing; Measuring a pressure differential between the upstream side of the filter and the downstream side of the filter via a pressure transducer located within the housing; Responsive to determining that the measured differential pressure is below both a first threshold and a second threshold, emitting a first color via a color changing indicator located on a front side of the housing, the first color indicating normal filter operating conditions; In response to determining that the measured differential pressure is above the first threshold and below the second threshold, issuing a second color from the color changing indicator, the second color indicating that the filter should be replaced as soon as possible, and In response to determining that the measured differential pressure is above the first threshold and above the second threshold, a third color is emitted from the color changing indicator, the third color indicating a warning that the filter should be replaced immediately.
8. 8. The method of claim 7, wherein the first color is green, wherein the second color is yellow, and wherein the third color is red.
9. 9. The method of claim 7, wherein the color changing indicator is a color changing light ring.
10. 10. The method of claim 9, further comprising displaying the measured pressure differential via a display screen located on the front side of the housing and within the color shifting light ring.
11. 11. The method of claim 7, wherein the determination as to whether the measured differential pressure is above the first threshold and above the second threshold is performed via a microprocessor.
12. 12. The method of claim 7, further comprising receiving the first threshold and the second threshold from user input.
13. 13. A system equipped with a filtration device, the system equipped with a filtration device comprising: A filter; A housing; A first pressure port on the housing, the first pressure port configured to enter an upstream side of the filter; A second pressure port on the housing, the second pressure port configured to enter a downstream side of the filter; A pressure transducer located within the housing, the pressure transducer configured to measure a pressure differential between the upstream side of the filter and the downstream side of the filter; a color changing indicator on a front side of the housing opposite a rear side of the housing, the color changing indicator configured to emit three different colors, and A control unit coupled to the pressure transducer and the color changing indicator, the control unit configured to: Responsive to determining that the measured differential pressure is below both a first threshold and a second threshold, causing a first color to be emitted from the color changing indicator, the first color being indicative of a normal filter operating condition; in response to determining that the measured differential pressure is above the first threshold and below the second threshold, causing a second color to be emitted from the color changing indicator, the second color indicating a warning that the filter should be replaced as soon as possible, and In response to determining that the measured differential pressure is above the first threshold and above the second threshold, a third color is emitted from the color changing indicator, the third color indicating a warning that the filter should be replaced immediately.
14. 14. The filter-equipped system according to claim 13, wherein the first color is green, wherein the second color is yellow, and wherein the third color is red.
15. 15. The filter-equipped system of claim 13, wherein the color changing indicator is a color changing light ring.
16. 16. The filter-equipped system of claim 15, further comprising a display screen located on the front side of the housing and within the color-changing light ring, the display screen configured to display the measured pressure differential.
17. 17. The filtration device equipped system of claim 13, wherein the control unit is a microprocessor.
18. 18. The filter-equipped system of claim 13, wherein the control unit is further configured to receive the first threshold and the second threshold from user input.
19. 19. The filter-equipped system of claim 13, wherein the filter-equipped system comprises a Heating Ventilation Air Conditioning (HVAC) system.

Description

Differential pressure sensor and monitor for measuring filter health Technical Field The present disclosure relates generally to systems, devices, and methods for filter health sensors. In particular, embodiments of the present disclosure relate to systems, devices, and methods for a filter health sensor configured to emit three different colors from a color changing indicator, the three different colors indicating different filter operating conditions. Background Customers have many applications in which effective knowledge of the health (e.g., cleanliness or degree of fouling) of filters in a system is critical to optimal performance. The health of the filter may affect energy usage, proper air flow, and/or the health of the space being serviced. Current solutions utilize a dial indicator or pressure transducer with a display that displays the current pressure reading. As these solutions do not depict the differential pressure limits of filter cleaning or fouling, it is difficult to understand the actual health of the system. Thus, the customer's need for being able to quickly and accurately intuitively understand the health of the filters in their equipment has not been met. Disclosure of Invention Advantageously, some implementations discussed herein provide a filter health sensor having a first pressure port and a second pressure port on a housing and configured to enter an upstream side and a downstream side of a filter, respectively. The filter health sensor changes the color of the color changing light indicator in response to a pressure change. The filter health sensor may have two pressure thresholds and three light indicating colors. The filter health sensor is configured to emit three different colors from the color changing indicator, the three different colors indicating normal filter operation, a warning that the filter should be replaced as soon as possible, or a warning that the filter should be replaced immediately. As will be described in greater detail below, in some implementations discussed herein, systems, devices, and methods for a filter health sensor are provided. The filter health sensor includes a first pressure port and a second pressure port located on the housing and configured to enter an upstream side and a downstream side of the filter, respectively. The pressure transducer is configured to measure a pressure differential between the upstream side of the filter and the downstream side of the filter. A color changing indicator is located on the front side of the housing to emit three different colors. The control unit is configured to cause three different colors to be emitted from the color changing indicator, the three different colors indicating normal filter operation, a warning that the filter should be replaced as soon as possible, or a warning that the filter should be replaced immediately. In one example, a filter health sensor includes a housing, a first pressure port, a second pressure port, a pressure transducer, a color changing indicator, and a control unit. The first pressure port is configured to enter an upstream side of the filter. The second pressure port is configured to enter a downstream side of the filter. The pressure transducer is located within the housing and configured to measure a pressure differential between the upstream side of the filter and the downstream side of the filter. The color changing indicator is located on a front side of the housing opposite the rear side and is configured to emit three different colors. The control unit is coupled to the pressure transducer and the color changing indicator. The control unit is configured to cause a first color to be emitted from the color changing indicator in response to determining that the measured differential pressure is below both a first threshold and a second threshold, the first color indicating a normal filter operating condition, cause a second color to be emitted from the color changing indicator in response to determining that the measured differential pressure is above the first threshold and below the second threshold, the second color indicating a warning that the filter should be replaced as soon as possible, and cause a third color to be emitted from the color changing indicator in response to determining that the measured differential pressure is above the first threshold and above the second threshold, the third color indicating a warning that the filter should be replaced as soon as possible. In another example, a method includes entering an upstream side of a filter via a first pressure port. Into the downstream side of the filter via a second pressure port. The pressure differential between the upstream side of the filter and the downstream side of the filter is measured via a pressure transducer located within the housing. In response to determining that the measured differential pressure is below both the first threshold and the second threshold, a first color is emitted