JP2003343946A - Thermal expansion valve with manual expansion valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermal expansion valve with a manual expansion valve coping with emergency maintenance, capable of temporarily continuing cooling operation even when regulation of the thermal expansion valve is disabled, and of being replaced without cutting off or working upon a refrigerant pipe. <P>SOLUTION: If it is determined that the regulation of the thermal expansion valve body 1 is disabled, by opening a manual regulating rod 11, a liquid refrigerant is decompressed at a needle valve 10 after passing through a liquid refrigerant bypass passage, flows into an evaporator from a gas tube connection port 6, and the operation can be restarted. The thermal expansion valve body 1 that can not be regulated can be easily replaced by removing bolts 4 without cutting off the refrigerant pipe connected with a liquid tube connection port 5 and the gas tube connection port 6. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention can quickly resume cooling operation even when a temperature expansion valve cannot be adjusted. The present invention relates to a temperature expansion valve with a manual expansion valve of an emergency maintenance type which can be replaced without processing. 2. Description of the Related Art Conventionally, when a temperature expansion valve cannot be adjusted, it has to be replaced with an equivalent temperature expansion valve in response to emergency maintenance. As a result, the cooling operation cannot be performed for a long period of time, resulting in product loss and sales loss. It took time. In terms of environment, in a system with one temperature expansion valve for one refrigerator, the refrigerant shut off in the liquid pipe cannot be recovered by itself, and the recovery operation by the recovery machine occurs or it is accidentally released to the atmosphere. Was causing destruction. [0003] Accordingly, the present invention provides
The invention was invented in order to reduce the cost burden on the user, prevent the deterioration of the quality of the product due to the stop of the cooling operation, eliminate the loss of the product and the loss of the sale, and prevent the environmental destruction due to the discharge of the refrigerant. Means for Solving the Problems Now, the structure will be described. (A) The thermal expansion valve main body is bolted with a packing 3 interposed between the thermal expansion valve main body 1 and the manual expansion valve main body 2. 1 and the manual expansion valve main body 2 are fixed. (B) The liquid pipe connection port 5 and the gas pipe connection port 6 are provided on the manual expansion valve main body 2 side. (C) The liquid refrigerant passage 7 and the gas refrigerant passage 8 common to the temperature expansion valve body 1 and the manual expansion valve body 2 are provided. (D) A liquid refrigerant bypass passage 9 is provided in the manual expansion valve main body 2. (E) The needle valve 10 and the manual adjustment rod 11 are provided on the manual expansion valve main body 2. The device is operated as described above. When it is determined that the temperature expansion valve main body 1 cannot be adjusted, the liquid refrigerant passing through the liquid refrigerant bypass passage 9 by opening the manual adjustment rod 11 is depressurized by the needle valve 10 and connected to the gas pipe. Flow from the port 6 to the evaporator can be resumed. Further, the temperature expansion valve main body 1 which cannot be adjusted can be easily replaced by removing the bolt 4 without cutting the refrigerant pipe connected to the liquid pipe connection port 5 and the gas pipe connection port 6. According to this method, even if the temperature expansion valve main body 1 cannot be adjusted, the cooling operation can be restarted immediately only by opening the manual adjustment rod 11 of the manual expansion valve main body 2, so that the product loss,
Sales losses, labor costs, and dry ice costs for cooling assistance can all be reduced. In addition, since the emergency operation is possible, the maintenance time and cost can be greatly reduced, and the liquid refrigerant blocked in the liquid pipe can be recovered to the refrigerator through the liquid refrigerant bypass passage 9, so that the recovery operation cost and maintenance can be performed. You can save time.
Also, accidental release to the atmosphere can be prevented, which can greatly contribute to environmental protection. When the temperature expansion valve body 1 is replaced, the bolt 4 is cut without cutting the refrigerant pipe.
By removing it, replacement is possible, and maintenance time and cost can be significantly reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a relationship between a temperature expansion valve main body 1 and a manual expansion valve main body 2. [Description of References] 1 is a temperature expansion valve main body 2 is a manual expansion valve main body 3 is a packing 4 is a bolt 5 is a liquid pipe connection port 6 is a gas pipe connection port 7 is a liquid refrigerant passage 8 is a gas refrigerant passage 9 is a liquid refrigerant bypass. The passage 10 is a needle valve 11 is a manual adjustment rod

Claims (1)

[Claims] (1) (B) Temperature expansion valve body 1 (B) Manual expansion valve body 2 (C) Packing 3 (D) Bolt 4 (E) Liquid pipe connection port 5 (F) Gas pipe connection port 6 (G) Liquid refrigerant passage 7 (H) Gas refrigerant passage 8 (I) Liquid refrigerant bypass passage 9 (N) Needle valve 10 (R) Manual adjustment rod 11 The temperature expansion valve with the manual expansion valve configured as described above.