Maibara, Japan
Maibara, Japan

Time filter

Source Type

Patent
Yanmar Co. | Date: 2017-05-03

In a chiller system, any one of a plurality of chillers is designated as a master chiller. Out of the plurality of chillers, at least one chiller that needs a defrost operation sends a request for the defrost operation to the master chiller. The master chiller permits the defrost operation to the at least one chiller that has sent the request for the defrost operation in arrival order up to a predetermined number of chillers. At least one chiller on standby for the defrost operation sends the request for the defrost operation to the master chiller in a predetermined cycle. When there are multiple chillers that are on standby for the defrost operation, the master chiller permits a next defrost operation to one of the multiple chillers on standby in descending order of the number of the requests or a request time for the defrost operation.


Patent
Yanmar Co. | Date: 2017-01-18

A work vehicle includes a cabin to cover an operators seat on a traveling body. A cabin frame that constitutes a framework of the cabin includes a pair of left and right front pillars, a pair of left and right rear pillars, a front beam, a rear beam, and side beams. The front beam couples upper end portions of the front pillars to each other. The rear beam couples upper end portions of the rear pillars to each other. Each of the side beams couples to each other upper end portions of each of the front pillars and each of the rear pillars that stand at a front and rear. The rear beam is formed to have a U-shaped cross-section by presswork of a metal plate material.


Patent
Yanmar Co. | Date: 2017-05-03

A heat pump type chiller (100) includes a compressor (10), a refrigerant-air heat exchanger (20), an expansion valve (40), and a refrigerant-circulating liquid heat exchanger (50) and cools a circulating liquid by heat exchange between the circulating liquid and a refrigerant. Temperature sensors (TWR, TWL, TWS) are provided respectively at a circulating liquid inlet port, at a circulating liquid outlet port, and on a surface portion of the refrigerant-circulating liquid heat exchanger (50). A pressure sensor (PL) is provided in a refrigerant suction path of the compressor (10). If it is detected that any one of temperatures detected by the three temperature sensors (TWR, TWL, TWS) and a refrigerant evaporation temperature calculated by converting a pressure detected by the pressure sensor (PL) is less than or equal to a predetermined temperature, the compressor (10) is stopped, and a circulation pump (300) for circulating the circulating liquid is activated.


Patent
Yanmar Co. | Date: 2017-05-03

A tractor headlight device according to the present invention is configured from a pair of high-beam units (4) and a pair of low-beam units (5), wherein the high-beam units (4) and the low-beam units (5) are respectively disposed at top and bottom. High-beam lamp lenses (43) configuring the high-beam units (4) are formed extending from the front to the sides of a hood (2). Low-beam lamp lenses (53) configuring the low-beam units (5) are formed along a front grill (23) under the high-beam units (4).


Patent
Yanmar Co. | Date: 2017-05-03

The purpose of the present invention is to provide an exhaust purifier (1) which is capable of restoring a pressure difference (P) and a purification rate (NOx removal efficiency) of a NOx catalyst (14) to the initial states thereof. An exhaust purifier (1) for removing particulate matter adhered to a NOx catalyst (14) by injecting pressurized air using an air injection nozzle (16) into a housing (13) of a catalyst reactor (12) in which the NOx catalyst (14) serving as a catalyst is positioned, wherein the particulate matter is removed by increasing the pressure inside the catalyst reactor (12) to a prescribed pressure (IP) within a prescribed interval of time (t) by operating an injection valve (17) for supplying pressurized air.


Patent
Yanmar Co. | Date: 2017-05-03

A hood 2 of a tractor 1 including a front grill 23, a light unit 24, 25, and an upper cover 21 is provided with a center pillar 51. The front grill 23 is attached to the center pillar 51, the light unit 24, 25 is attached to the front grill 23, and the upper cover 21 is supported by the center pillar 51. The hood is further provided with a side frame 52 and a lower cover 22, where the side frame 52 is attached to the center pillar 51, and the lower cover 22 is attached to at least the upper cover 21 and the side frame 52.


Patent
Yanmar Co. | Date: 2017-05-03

A technical object of the invention is to provide a work vehicle (1) which can meet cost reduction request while achieving improvement of rigidity of a cabin frame (300). The work vehicle (1) of the invention is provided with a cabin (7) which covers a control seat (8) on a travel machine body (2). The cabin (7) has a cabin frame (300) which constructs a framework. At least one frame member (304, 305) of the cabin frame (300) is formed into a C-shaped cross section. A reinforcing plate (304a, 305a) extending along a longitudinal direction of the frame member (304, 305) is fixed by welding to an opening portion of the frame member (304, 305). At least longitudinally intermediate portion of the frame member (304, 305) is formed into a hollow shape.


Patent
Yanmar Co. | Date: 2017-05-03

The purpose of the invention is to provide an exhaust purification device capable of suppressing the decrease in NOx catalyst removal efficiency over time due to soot accumulation. The invention provides an exhaust purification device (1) for using an air injection nozzle (16) to inject pressurized air into a casing (13) of a catalyst reactor (12) containing an NOx catalyst (14) as a catalyst and removing soot adhering to the NOx catalyst (14), wherein it is determined and externally notified that there is abnormal deterioration in the NOx catalyst (14) when the pressure difference P in exhaust between the upstream and downstream sides of the NOx catalyst (14) has increased by at least a first reference pressure difference increase Pt1, which is the allowable amount of pressure difference increase, above the pressure difference Pi in exhaust between the upstream and downstream sides of the catalyst in the initial state at the same exhaust flow rate Ve.


A radiant heat recovery heater 1 includes U-shaped heat transfer tubes 12 each including a first path 121 and a second path 122 arranged on a mounting section 11. The U-shaped heat transfer tubes 12 are housed in a container 13 fixed to the mounting section 11. The first paths 121 and the second paths 122 of the U-shaped heat transfer tubes 12 are arranged on the mounting section 11 at equal intervals with a pitch angle . The first paths 121 are each arranged on the mounting section 11 at a position offset from the pitch angle for the associated second path 122 by a predetermined angle , so as not to completely overlap a projection 122A of that second path 122, the projection 122A extending from the container 13 toward the center C of the container 13.


Patent
Yanmar Co. | Date: 2017-05-31

In a work vehicle according to the present invention, a control device calculates, for each of a plurality of speed-changing stages in a PTO transmission, an expected maximum rotational speed of PTO rotary power that is output from the PTO shaft when an engine rotational speed changing operation member is operated to a maximum extent, and shows, in a listed manner, the calculated results in a liquid crystal display part of a display device. The present invention can inform an operator of the maximum rotational speed of PTO rotary power that is output from the PTO shaft for each speed-changing stage in the PTO transmission without performing a speed changing operation on the PTO transmission.

Loading Yanmar Co. collaborators
Loading Yanmar Co. collaborators