On-line shield pump switching system applied on lithium bromide absorption cold and hot water unit

Abstract

The invention relates to an on-line shield pump switching system applied on a lithium bromide absorption cold and hot water unit, which comprises an on-line solution pump switching system, and an on-line refrigerant pump switching spray system; the on-line solution pump switching system comprises a solution pump I(1) and a solution pump II (2), pipelines connected in order and a control system which are connected parallelly; the on-line refrigerant pump switching spray system comprises a refrigerant pump I(8) and a refrigerant pump II (9), pipelines connected in order and a control system which are connected paralelly; the on-line shield pump switching system is characterized in that the outlet pipelines of the solution pump I(1) and the solution pump II (2) are respectively provided with a check valve I(14) and a check valve II (15); and the outlet pipelines of the refrigerant pump I(8) and the refrigerant pump II (9) are respectively provided with a check valve III (16) and a check valve IV (17). The on-line shield pump switching system applied on the lithium bromide absorption cold and hot water unit can realize an on-line switching function, and has low cost and high reliability.

Description

(1) Technical field [0001] The invention relates to a lithium bromide absorption type cold and hot water unit, in particular to an online switching shielded pump system applied to the lithium bromide absorption type cold and hot water unit. It belongs to the technical field of air conditioning equipment. (2) Background technology [0002] In the past, when the lithium bromide absorption chiller and hot water unit were used in occasions requiring high equipment reliability, the moving parts in the lithium bromide absorption chiller and hot water unit were only the solution pump of the shielded pump lithium bromide solution system and the refrigerant water spray system Refrigerant pumps are collectively referred to as canned pumps. In order to improve reliability, the method adopted is to use a standby system for the canned pump, and the two systems are connected in parallel. A cut-off valve is set at the outlet of each pump, and the main canned pump is realized through manual...

AI Technical Summary

Problems solved by technology

[0003] Due to the application of lithium bromide absorption cold and hot water units in the production process system of some special industries, unexpected shutdown will bring great economic losses to users, and the requirements for continuous operation of equipment are high, requiring equipment to operate uninterrupted. When the pump is switched, manual cut-off valve is used to switch, and online automatic switching cannot be realized. If the cut-off valve is changed to an automatic regulating valve, although the online switching function can be realized, because it is a high-vacuum chamber, the sealing requirements and reliability requirements for the valve are required. High, expensive, low reliability

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