Heat pump with adaptive frost determination function

Details Heat pump with adaptive frost determination function Heat pump with adaptive frost determination function

1988-10-12

1990-04-17

Tanner, Harry B.

Refrigeration

Processes

Defrosting or frost inhibiting

62155, 62156, F25D 2106

Patent

active

049169122

ABSTRACT:
The present invention is an adaptive method and apparatus for detecting the formation of frost in a heat pump. The compressor cycle is interrupted and a defrosting operation is begun if the difference between the exterior ambient temperature and exterior heat exchanger temperature exceeds a difference function of the exterior ambient temperature. The length this defrosting cycle is measured and the difference function is altered if the measured length deviates from a predetermined length of time. The frost formation difference function is initially set as a linear approximation. Thereafter the difference function value at the particular exterior ambient temperature is increased if the length the defrosting is greater than an upper limit value of six minutes and decreased if the length the defrosting is less than a lower limit value of four minutes. In the preferred embodiment, the exterior heat exchanger temperature is measured by a sensor and the exterior ambient temperature is determined once each compressor cycle from this measured temperature.

REFERENCES:
patent: 2001027 (1935-05-01), Kitzmiller
patent: 2947153 (1960-08-01), Atchison
patent: 3070972 (1963-01-01), Atchison
patent: 3466888 (1969-09-01), Kyle
patent: 4086779 (1978-05-01), Lewis
patent: 4102391 (1978-07-01), Noland et al.
patent: 4209994 (1980-07-01), Mueller et al.
patent: 4215554 (1980-08-01), Pohl
patent: 4253130 (1981-02-01), Newell
patent: 4302947 (1981-12-01), Mueller et al.
patent: 4328680 (1982-05-01), Stamp et al.
patent: 4338790 (1982-07-01), Saunders et al.
patent: 4373349 (1983-02-01), Mueller
patent: 4373350 (1983-02-01), Noland
patent: 4406133 (1983-09-01), Saunders et al.
patent: 4417452 (1983-11-01), Ruminsky et al.
patent: 4439995 (1984-04-01), McCarty
patent: 4573326 (1986-03-01), Sulfstede et al.
patent: 4608832 (1986-09-01), Sabin et al.
patent: 4627245 (1986-12-01), Levine
patent: 4648551 (1987-03-01), Thompson et al.
patent: 4662184 (1987-05-01), Pohl et al.
patent: 4745766 (1988-05-01), Bahr
patent: 4751825 (1988-06-01), Voorhis et al.
patent: 4760332 (1988-06-01), Jenski et al.
patent: 4773587 (1988-09-01), Lipman

Affiliated with

Also associated with

Rating

Heat pump with adaptive frost determination function does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Heat pump with adaptive frost determination function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat pump with adaptive frost determination function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1044316