Source: https://patents.google.com/patent/US10077774B2/en
Timestamp: 2019-06-19 09:23:39
Document Index: 126689886

Matched Legal Cases: ['Application No. 60', 'Application No. 200880110785', 'Application No. 08836944', 'Application No. 08836944', 'Application No. 08837095', 'Application No. 08837095', 'Application No. 08837504', 'Application No. 08837504', 'Application No. 08837777']

US10077774B2 - Variable speed compressor protection system and method - Google Patents
US10077774B2
US10077774B2 US15/346,220 US201615346220A US10077774B2 US 10077774 B2 US10077774 B2 US 10077774B2 US 201615346220 A US201615346220 A US 201615346220A US 10077774 B2 US10077774 B2 US 10077774B2
US15/346,220
US20170051740A1 (en
2016-11-08 Application filed by Emerson Climate Technologies Inc filed Critical Emerson Climate Technologies Inc
2017-02-23 Publication of US20170051740A1 publication Critical patent/US20170051740A1/en
2018-09-18 Publication of US10077774B2 publication Critical patent/US10077774B2/en
This application is a continuation of U.S. patent application Ser. No. 13/893,493, filed on May 14, 2013 and issued as U.S. Pat. No. 9,494,158, which is a continuation of U.S. patent application Ser. No. 12/246,959, filed on Oct. 7, 2008 and issued as U.S. Pat. No. 8,459,053. This application claims the benefit of U.S. Provisional Application No. 60/978,258, filed on Oct. 8, 2007. The entire disclosures of each of the above applications are incorporated herein by reference.
Mass Flow=m0+m1*Tevap+m2*Tcond+m3*RPM+m4*Tevap*Tcond+m5*Tevap*RPM+m6*Tcond*RPM+m7*Tevap^2+m8*Tcond^2+m9*RPM^2+m10*Tevap*Tcond*RPM+m11*Tevap^2*Tcond+m12*Tevap^2*RPM+m13*Tevap^3+m14*Tevap*Tcond^2+m15*Tcond^2*RPM+m16*Tcond^3+m17*Tevap*RPM^2+m18*Tcond*RPM^2+m19*RPM^3 Equation 6:
delta T=Ts−Ti Equation 7:
a control module connected to the discharge line temperature sensor, said control module receiving compressor power data, determining a saturated condenser temperature as a function of the compressor power data and a speed of the compressor, calculating a discharge superheat temperature based on the saturated condenser temperature and the discharge line temperature, monitoring a flood back condition of the compressor by comparing the discharge superheat temperature with a predetermined threshold, and, when the discharge superheat temperature is less than or equal to the predetermined threshold, increasing the speed of the compressor.
3. The system of claim 1 wherein the control module decreases an opening of an expansion valve associated with the compressor when the discharge superheat temperature is less than or equal to the predetermined threshold.
4. The system of claim 1 wherein the control module monitors a sudden flood back condition by determining whether the discharge superheat temperature decreases by a predetermined amount within a predetermined time period.
5. The system of claim 1 further comprising an evaporator connected to the compressor and the condenser, wherein the control module receives compressor power data, determines a saturated evaporator temperature as a function of the saturated condenser temperature, the discharge line temperature, and the speed of the compressor, and determines the saturated condenser temperature as a function of the compressor power data, the speed of the compressor, and the saturated evaporator temperature.
6. The system of claim 5 wherein the control module performs multiple iterations of determining the saturated condenser temperature and the saturated evaporator temperature to achieve convergence.
7. The system of claim 1 wherein the control module receives compressor power data and determines the saturated condenser temperature as a function of the compressor power data, the speed of the compressor, and the discharge line temperature.
US15/346,220 2007-10-08 2016-11-08 Variable speed compressor protection system and method Active US10077774B2 (en)
US13/893,493 Continuation US9494158B2 (en) 2007-10-08 2013-05-14 Variable speed compressor protection system and method
US16/131,585 Continuation US20190017508A1 (en) 2007-10-08 2018-09-14 Variable Speed Compressor Protection System And Method
US20170051740A1 US20170051740A1 (en) 2017-02-23
US10077774B2 true US10077774B2 (en) 2018-09-18
EP3264008A4 (en) * 2015-03-13 2018-10-10 Mitsubishi Electric Corporation Freezing device
DE102006036282A1 (en) 2005-08-04 2007-02-15 Denso Corp., Kariya Coolant circuit arrangement with ejector pump coolant has adjustable output of first and second compressors, reduction in coolant pressure through nozzle and decompression device
2008-10-08 CN CN 200880110785 patent/CN101821508B/en active IP Right Grant
US20150051742A1 (en) 2007-10-05 2015-02-19 Emerson Climate Technologies, Inc. Vibration protection in a variable speed compressor
International Search Report for International Application No. PCT/US2008/011596, dated Feb. 25, 2009.
Notification of the First Office Action from the State Intellectual Property Office of People's Republic of China regarding Chinese Patent Application No. 200880110785.0, dated May 14, 2012. Translation provided by Unitalen Attorneys at Law.
Office Action regarding European Patent Application No. 08836944.2, dated Jan. 26, 2018.
Office Action regarding European Patent Application No. 08836944.2, dated Jul. 5, 2017.
Office Action regarding European Patent Application No. 08837095.2, dated Jul. 5, 2017.
Office Action regarding European Patent Application No. 08837095.2-1605, dated Dec. 13, 2017.
Office Action regarding European Patent Application No. 08837504.3, dated Jul. 5, 2017.
Office Action regarding European Patent Application No. 08837504.3-1009, dated Jan. 19, 2018.
Office Action regarding European Patent Application No. 08837777.5, dated Jun. 14, 2017.
Office Action regarding U.S. Appl. No. 12/246,893, dated Apr. 14, 2017.
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Restriction Requirement regarding U.S. Appl. No. 13/893,493, dated Oct. 29, 2015.
U.S. Appl. No. 12/246,893, filed Oct. 7, 2008, Joseph G. Marcinkiewicz et al.