Refrigerating apparatus
First Claim
1. A refrigeration system comprising:
- a compressor, an evaporator having an air suction side and including conduit in which refrigerant is located, an expansion device, and a condenser, coupled together;
a first temperature detector for measuring temperature of air entering said evaporator;
a second temperature detector for measuring temperature of refrigerant inside said evaporator; and
a differential temperature detector for calculating the difference betweena) the temperature measured by the first temperature detector andb) the temperature measured by the second temperature detector to determine whether refrigerant leak has occurred.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus for detecting refrigerant leak in a refrigerating apparatus using refrigerant and a heat pump type refrigerating apparatus at low cost is presented. A refrigerant leak is judged from the differential temperature and the running time, by comprising a refrigeration system including a compressor, an evaporator, an expansion device, and a condenser, being sequentially coupled annularly by a conduit, a first temperature detector for detecting the air temperature of suction port of the evaporator, a second temperature detector for detecting the refrigerant temperature at the middle part of the evaporator, a differential temperature detector for calculating the differential temperature of the detectors, and a running time detector for storing the cumulative running time of the compressor.
92 Citations
35 Claims
-
1. A refrigeration system comprising:
-
a compressor, an evaporator having an air suction side and including conduit in which refrigerant is located, an expansion device, and a condenser, coupled together; a first temperature detector for measuring temperature of air entering said evaporator; a second temperature detector for measuring temperature of refrigerant inside said evaporator; and a differential temperature detector for calculating the difference between a) the temperature measured by the first temperature detector and b) the temperature measured by the second temperature detector to determine whether refrigerant leak has occurred. - View Dependent Claims (2, 6, 7, 8, 9)
-
-
3. A refrigeration system comprising:
-
a compressor, an evaporator having an air suction side and including conduit in which refrigerant is located, an expansion device, and a condenser, coupled together; a first temperature detector for measuring temperature of air entering said evaporator; a second temperature detector for measuring temperature of refrigerant inside said evaporator; a differential temperature detector for calculating the difference between a) the temperature measured by the first temperature detector and b) the temperature measured by the second temperature detector, and a running time detector for measuring running time of said refrigeration system; wherein the difference between the temperature measured by the first temperature detector and the temperature measured by the second temperature detector and the accumulated running time of said refrigeration system are used to determine whether refrigerant leak has occurred. - View Dependent Claims (4, 5)
-
-
10. A heat pump system comprising:
-
a compressor, a reversing valve, a first heat exchanger having an air suction side and including conduit in which refrigerant is located, an expansion device, and a second heat exchanger coupled together; a first temperature detector for measuring temperature of air entering said first heat exchanger; a second temperature detector for measuring temperature of refrigerant inside said evaporator; and a differential temperature detector for calculating the difference between a) the temperature measured by the first temperature detector and b) the temperature measured by the second temperature detector to determine whether refrigerant leak has occurred. - View Dependent Claims (11, 18, 19, 20, 21)
-
-
12. A heat pump system comprising:
-
a compressor, a reversing valve, a first heat exchanger having an air suction side and including conduit in which refrigerant is located, an expansion device, and a second heat exchanger, coupled together; a first temperature detector for measuring temperature of air entering said first heat exchanger; a second temperature detector for measuring temperature of refrigerant inside said evaporator; differential temperature detector for calculating the difference between a) the temperature measured by the first temperature detector and b) the temperature measured by the second temperature detector, and a running time detector for measuring running time of said refrigeration system; wherein the difference between the temperature measured by the first temperature detector and the temperature measured by the second temperature detector and the accumulated running time of said refrigeration system used to determine whether refrigerant leak has occurred. - View Dependent Claims (13, 14)
-
-
15. A heat pump system comprising:
-
a compressor, a reversing valve, a first heat exchanger having an air suction side and including conduit in which refrigerant is located, an expansion device, and a second heat exchanger, coupled together; a first heat exchanger adjacent a first location; a second heat exchanger adjacent a second location; wherein said first heat exchanger operates as an evaporator when said first location has a lower temperature than said second location, a first temperature detector for measuring temperature of air entering said first heat exchanger; a second temperature detector for measuring temperature of refrigerant inside said evaporator; differential temperature detector for calculating the difference between a) the temperature measured by the first temperature detector and b) the temperature measured by the second temperature detector and a running time detector for measuring running time of said refrigeration system; wherein the difference between the temperature measured by the first temperature detector and the temperature measured by the second temperature detector and the accumulated running time of said refrigeration system are used to determine whether refrigerant leak has occurred. - View Dependent Claims (16, 17)
-
-
22. A method for detecting refrigerant leakage in a refrigeration system which includes a compressor, an evaporator having an air suction side and including conduit in which refrigerant is located, an expansion device, an a condenser coupled together, said method comprising the steps of:
-
a) measuring temperature of air entering said evaporator; b) measuring temperature of refrigerant inside said evaporator; and c) calculating the difference between the temperature measured in steps a) and b) to determine if refrigerant leakage has occurred. - View Dependent Claims (23, 32, 33, 34, 35)
-
-
24. A method of detecting refrigerant leakage in a refrigeration system which includes a compressor, an evaporator having an air suction side and including conduit in which refrigerant is located, an expansion device, and a condenser coupled together and, said method comprising the steps of:
-
a) measuring temperature of air entering said evaporator b) measuring temperature of refrigerant inside said evaporator; c) calculating the difference between the temperature measured in stages a) and b); d) measuring accumulated running time of said refrigeration system; and e) using the difference calculated in step c) and running time measured in step d) to determine if refrigerant leakage has occurred. - View Dependent Claims (25)
-
-
26. A method of detecting refrigerant leakage in a heat pump system which includes a compressor, a reversing valve, a first heat exchanger having an air suction side and including conduit in which refrigerant is located, an expansion device, and a second heat exchanger coupled together, said method comprising the steps of:
-
a) measuring temperature of air entering said a first heat exchanger; b) measuring temperature of refrigerant inside said evaporator; and c) calculating the difference between the temperature measured in stages a) and b) to determine if refrigerant leakage has occurred. - View Dependent Claims (27)
-
-
28. A method of detecting refrigerant leakage in a heat pump system which includes a compressor, a reversing valve, a first heat exchanger having an air suction side and including conduit in which refrigerant is located, an expansion device, and a second heat exchanger coupled together said method comprising the steps of:
-
a) measuring temperature of air entering said evaporator; b) measuring temperature of refrigerant inside said evaporator; c) calculating the difference between the temperature measured in stages a) and b); d) measuring accumulated running time of said refrigeration system; and e) using the difference calculated in step c) and running time measured in step d) to determine if refrigerant leakage in a heat pump system. - View Dependent Claims (29)
-
-
30. A method of detecting refrigerant leakage in a heat pump system which includes a compressor, a reversing valve, a first heat exchanger having an air suction side and including conduit in which refrigerant is located, an expansion device, and a second heat exchanger coupled together, wherein the first heat exchanger is operable as an evaporator when the location of said first heat exchanger has a lower temperature than the location of said second heat exchanger, said method comprising the steps of:
-
a) measuring temperature of air entering said evaporator; b) measuring temperature of refrigerant inside said evaporator; c) calculating the difference between the temperature measured in stages a) and b); d) measuring accumulated running time of said refrigeration system; and e) using the difference calculated in step c) and running time measured in step d) to determine if refrigerant leakage in a heat pump system. - View Dependent Claims (31)
-
Specification