Abstract: The present disclosure relates to a heat press machine and a working method. The heat press machine includes a base, a support and a heat pressing assembly, wherein the base includes a base body and a support base slidably connected to the base body; the support base is configured to carry a workpiece to be processed; the support is connected to the base; and the heat pressing assembly includes a heat pressing member arranged opposite the support base and a driving member for driving the heat pressing member. When the workpiece is placed by a user, the support base can be driven to slide relative to the base body and move the support base away from the heat pressing assembly, thereby avoiding burns from the heat pressing assembly during the placement of the workpiece to be processed.

Abstract: The present disclosure provides a control method of the heat pump system and the heat pump system, wherein the method includes: acquiring a power supply signal in real time when the heat pump system is turned on to operate, wherein the power supply signal includes one of a valley electrical signal, a peak electrical signal, and a free-of-charge electrical signal; controlling an intelligent operation of the heat pump system according to the power supply signal and a user setting mode, wherein the user setting mode includes a hot water production mode and/or an air conditioning mode.

Abstract: Provided are integrated water device applied to heat pump system, heat pump system, and control method thereof. The integrated water device includes: main module, auxiliary module, and three-way valve; when the heat pump system simultaneously has heating water demand and air conditioning demand, first end and second end of the three-way valve are controlled to be communicated, so that the heat pump main unit heats the water in the domestic water tank through the main module, and the heat pump auxiliary unit provides heat source or cooling source to the terminal device through the auxiliary module; and, when the heating for the domestic water tank is completed, the first end of the three-way valve is controlled to switch to be communicated with the third end so that the heat pump main unit and the heat pump auxiliary unit jointly provide heat source or cooling source to the terminal device.

Abstract: A cutting plotter includes a cutting plotter shell, a placement plate disposed outside the cutting plotter shell, an upper transmission assembly and a lower transmission assembly disposed at two ends of the cutting plotter shell, and a belt assembly disposed in the cutting plotter. The lower transmission assembly and the upper transmission assembly correspond to each other to assist paper in entering the cutting plotter. A slide rod is disposed in the cutting plotter shell and located at the top of the upper transmission assembly, and a cutting tool assembly is disposed on the slide rod. The belt assembly includes a driving motor. A belt body is steered through a steering belt wheel of the belt assembly, and the distance between parallel parts of the belt body is decreased through two small-radius tensioning belt wheels, such that the chain installation space is reduced and the cutting plotter is compact.

Abstract: Provided is a Raman spectroscopy method for simultaneously measuring a temperature and a thermal stress of a two-dimensional film material in situ. The method includes: providing the two-dimensional film material including a suspended part and a supported part and measuring Raman signals of the suspended part and the supported part; establishing equations of a Raman shift with temperature and a Raman shift with thermal stress for each of the suspended part and the supported part, and solving simultaneous equations to obtain coefficients with temperature and thermal stress; and scanning a characteristic Raman spectrum field of the two-dimensional film material and obtaining a temperature distribution and a thermal stress distribution of the two-dimensional film material according to the characteristic Raman spectrum field in combination of the coefficients of the Raman shift with temperature and the Raman shift with thermal stress.

Abstract: Provided is a Raman spectroscopy method for simultaneously measuring a temperature and a thermal stress of a two-dimensional film material in situ. The method includes: providing the two-dimensional film material including a suspended part and a supported part and measuring Raman signals of the suspended part and the supported part; establishing equations of a Raman shift with temperature and a Raman shift with thermal stress for each of the suspended part and the supported part, and solving simultaneous equations to obtain coefficients with temperature and thermal stress; and scanning a characteristic Raman spectrum field of the two-dimensional film material and obtaining a temperature distribution and a thermal stress distribution of the two-dimensional film material according to the characteristic Raman spectrum field in combination of the coefficients of the Raman shift with temperature and the Raman shift with thermal stress.

Abstract: An oil return method for multi-split air conditioner in heating comprises steps of: S1, adjusting operation frequency f0 of a compressor (11) to a first preset oil return frequency f1, and simultaneously, adjusting open degree S0 of each indoor throttling element (22) to a preset oil return open degree; S2, measuring operation parameters of the air conditioner; S3, judging whether the air conditioner operates abnormally, jumping to Step S4 if so, or jumping to Step S5 if not; S4, exiting from oil return process, adjusting the operation frequency f0 of the compressor (11) to a second preset oil return frequency f2, judging whether the air conditioner operates abnormally, existing from the oil return process if so, or jumping to Step S5 if not; S5, ending the oil return process when oil return time reaches the oil return time t2.

Abstract: An oil return method for multi-split air conditioner in heating comprises steps of: S1, adjusting operation frequency f0 of a compressor (11) to a first preset oil return frequency f1, and simultaneously, adjusting open degree S0 of each indoor throttling element (22) to a preset oil return open degree; S2, measuring operation parameters of the air conditioner; S3, judging whether the air conditioner operates abnormally, jumping to Step S4 if so, or jumping to Step S5 if not; S4, exiting from oil return process, adjusting the operation frequency f0 of the compressor (11) to a second preset oil return frequency f2, judging whether the air conditioner operates abnormally, existing from the oil return process if so, or jumping to Step S5 if not; S5, ending the oil return process when oil return time reaches the oil return time t2.