Transcritical refrigeration system with gas cooler assembly
US-2024183588-A1 · Jun 6, 2024 · US
Drive torque estimation device for compressor and condenser used for the device
US8978484B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8978484-B2 |
| Application number | US-201213711956-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 12, 2012 |
| Priority date | Dec 15, 2011 |
| Publication date | Mar 17, 2015 |
| Grant date | Mar 17, 2015 |
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Abstract
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A drive torque estimation device secures accuracy of a drive torque of a compressor by accurately grasping a flow rate of refrigerant in a cycle. The pressure difference is detected by a condenser as a resistor for calculating the flow rate. The pressure difference between two portions based on physical quantities relating to refrigerant pressures is detected using first and second sensors arranged at two portions in the cycle. A flow rate is calculated based on the detected pressure difference. The first sensor may be an upstream-side pressure sensor arranged at an inlet of the condenser or at a high-pressure side pipe upstream of the inlet and detects a pressure of the refrigerant flowing therethrough, and the second sensor may be a downstream-side pressure sensor arranged at a gas/liquid mixed phase region of the condenser and detects a pressure of the refrigerant flowing therethrough or may be a temperature sensor.
First claim
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What is claimed is: 1. A drive torque estimation device which calculates an estimated value of a drive torque of a compressor using a flow rate of a refrigerant which flows in a refrigerating cycle including the compressor, a condenser, an expansion device and an evaporator as one of variable parameters comprising: a first sensor which detects a physical quantity relating to a pressure of the refrigerant which flows through a predetermined portion of the refrigerating cycle; and a…
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Frequently asked questions
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- What does patent US8978484B2 cover?
- A drive torque estimation device secures accuracy of a drive torque of a compressor by accurately grasping a flow rate of refrigerant in a cycle. The pressure difference is detected by a condenser as a resistor for calculating the flow rate. The pressure difference between two portions based on physical quantities relating to refrigerant pressures is detected using first and second sensors arra…
- Who is the assignee on this patent?
- Valeo Japan Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F25B39/04. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 17 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).