| 摘要 |
A modular valve combination system for vehicle fluid heating systems containing water type fluids comprises a number of valve units (1, 1', 1''). Each valve unit is associated with a stackable collector housing (2) with first and second through bores (3, 4). When stacked said bores form a fluid supply collector (3) and a fluid return collector (4) respectively. Each valve unit (1, 1', 1'') comprises a primary valve means (7, 7', 7''). At least one of the valve units (1, 1', 1'') is connected to its associated stackable collector housing (2) so that its primary valve means (7, 7', 7'') selectively can allow a flow either from fluid supply collector (3) to an external circuit, which is then returned to the fluid return collector (4) or into the fluid return collector (4) from an external circuit, which originates from the fluid supply collector (3). At least one of the stackable collector housings (2) display a bypass-channel (9, 9'), connecting the fluid supply collector (3) with the fluid return collector (4). The valve unit associated with said collector housing (2) comprises a secondary valve means (10, 10') for allowing a bypass flow through the bypass-channel (9, 9'), when the primary valve means (7, 7', 7'') is closed and vice versa. |
