LED lamp secondary optical lens and lens module

The invention discloses an LED lamp secondary optical lens and a lens module. The lens comprises a lens body, wherein the lens body is provided with a base surface, an incidence surface and a projecting surface; the lens body forms a semi-elliptical protrusion along the base surface, and the peripheral convex cambered surface of the lens body forms the projecting surface of the lens; and the base surface is sunken in the middle to form the incidence surface comprising the semi-elliptical surface and the cambered surface. The lens module is injected and moulded by a plurality of lenses. The invention can effectively solve the problem of focusing of the traditional LED lamp secondary optical lens.

Method for zero-discharge phosphatization and saponification based on high-pressure closed circulation system

Automatic acetylene flow control system and method for low-pressure acetylene carburizing furnace

The invention discloses an acetylene flow automatic control system and method for a low-pressure acetylene carburizing furnace, and the system comprises a control center, and a proportional valve, a gas storage tank, a pneumatic ball valve, the low-pressure carburizing furnace, a vacuum pump and a residual gas analyzer which are respectively and electrically connected with the control center and are sequentially connected through a pipeline; and the residual gas analyzer is used for measuring the percentage of acetylene in the residual gas pumped out by the vacuum pump after the carburizing process. According to the invention, the volume percentage of acetylene in residual gas after carburization can be calculated through an analyzer in a carburization period, and the flow of input acetylene can be automatically adjusted according to different results of the volume percentage of acetylene in the residual gas in the previous time; the volume percentage of acetylene in the residual gas is ...

Integrated fresh air conditioner using carbon dioxide as refrigerant and refrigerating and heating method of integrated fresh air conditioner

The invention discloses an integrated fresh air conditioner using carbon dioxide as a refrigerant and a refrigerating and heating method of the integrated fresh air conditioner. The integrated fresh air conditioner using the carbon dioxide as the refrigerant comprises an air energy main machine, a supercharger, a storage tank and a heat exchanger which are matched with one another. The device further comprises a shell and an air supply fan. The air energy main machine, the supercharger and the storage tank are correspondingly installed in a first inner cavity of the shell, and the first inner cavity is provided with a first air inlet and a first air outlet. The heat exchanger and the air supply fan are sequentially arranged in the second inner cavity, the second inner cavity is provided with a second air inlet and a second air outlet, and the air supply fan is used for blowing air around the heat exchanger to the second air outlet. According to the air conditioner, all parts are arranged ...

Bicycle accessory embossing technology

The invention provides a bicycle accessory embossing technology which includes the following steps of a tube machining technology and/or a plate machining technology. The tube machining technology includes the following steps that (1) tubes are prepared for feeding, (2) grinding is carried out, (3) the tubes are drawn out, (4) embossing is carried out, (5) the tubs are bent and shaped, (6) T4T6 heat treatment is carried out if necessary and (7) anodizing is carried out. The plate machining technology includes the following steps that (1) panels are prepared for feeding, (2) embossing is carried out, (3) punching is carried out, (4) T4T6 heat treatment is carried out if necessary and (5) anodizing is conducted. The bicycle accessory embossing technology has the advantages that colorful optical reflection effects can be presented when people see from different angles, bicycle accessories are beautiful, personalized and high in safety, the yield of the bicycle accessories is improved, the ...

Dual-supply refrigerating and heating system

The invention discloses a dual-supply refrigerating and heating system which comprises a supercharger, a first air energy main machine, a second air energy main machine, a secondary refrigerant heat exchange mechanism and a water heater. The high-pressure outlet end of the supercharger is connected with an inlet of the first air energy main machine, a refrigerant inlet of the water heater and a first port of the secondary refrigerant heat exchange mechanism, and a first electric ball valve is arranged at the first port of the secondary refrigerant heat exchange mechanism. An outlet of the first air energy host is connected with a first port of the secondary refrigerant heat exchange mechanism; a second port of the secondary refrigerant heat exchange mechanism is connected with the low-pressure inlet end of the supercharger through a first pipeline and is sequentially connected with the second air energy main machine and the low-pressure inlet end of the supercharger through a second pipeline ...

Tension-reducing anastomosis apparatus

A tension-reducing anastomosis device comprises an anastomosis sheet, and a plurality of barb-shaped thorn protrusions are distributed on the end faces of the two sides of the anastomosis sheet. The anastomosis sheets comprise the first sheet and the second sheet, and the sides, close to each other, of the two sheets are provided with close edges. And the thorn convex parts on the two sheets are respectively arranged towards the direction close to the side by taking the close to the side as a boundary. By adopting the sheet-shaped anastomosis sheet, the suture labor intensity of a doctor on a wound can be reduced, and tedious suture and knotting operations are avoided. The thorn convex parts formed on the surface of the anastomosis sheet can fix the wound in the skin, so that scars on the surface of the healed skin are greatly reduced. And the stab convex parts can be arranged in parallel by adopting the sheet-shaped matching sheet, so that uniform tensioning can be facilitated when the ...

Controlled atmosphere fresh-keeping freezer system

The invention discloses a modified atmosphere fresh-keeping freezer system which comprises a liquid storage tank, a nitrogen making machine, a supercharger, an air energy main machine, a humidifier and more than two variable temperature chambers, an outlet of the supercharger is connected with an inlet of the air energy host; a component mounting area and a storage area are arranged in each variable temperature chamber; each temperature changing chamber comprises a heat exchanger and a circulating fan which are arranged in the component mounting area; a gas outlet of the nitrogen making machine is respectively communicated with each component mounting area; an outlet of the air energy main machine is connected with an inlet of the liquid storage tank and inlets of the heat exchangers, and the inlet of each heat exchanger is provided with a first electronic expansion valve. An outlet of each heat exchanger is connected with an inlet of the supercharger; an exhaust port is further formed ...

Thermal printing head

The invention relates to a thermal printing head, in particular to a thermal printing head that a high-heat-conductivity interlayer is added into a base layer. The thermal printing head is characterized in that the high-heat-conductivity interlayer is added into the base layer of a thermal printing head base plate; the heat conductivity of the interlayer is greater than 20W/mK; an external lead is arranged in the interlayer. When the thermal printing head is required to be provided with a rapid heat dissipation property, the lead of the interlayer is connected with a base platform of the thermal printing head, so that the heat dissipation efficiency of the base layer is improved; when the thermal printing head is not required to be provided with the rapid heat dissipation property, the lead is suspended and is not connected, then the heat dissipation velocity of the thermal printing head depends on the heat conductivity of the base layer. The thermal printing head has the advantages that ...

Air energy refrigeration and variable flow control system and method

The invention discloses an air energy refrigeration and variable flow control system and method. The control system comprises a storage tank, a compressor, a first air energy heat exchanger, a second air energy heat exchanger, a secondary refrigerant heat exchanger, a first expansion valve and a second expansion valve. An outlet of the storage tank is connected to the low-pressure inlet end of the compressor through a pipeline sequentially provided with a first expansion valve and a first air energy heat exchanger. The high-pressure outlet end of the compressor is connected with an inlet of the second air energy heat exchanger through a pipeline. An outlet of the second air energy heat exchanger is connected with an inlet of the storage tank and an inlet of the secondary refrigerant heat exchanger in parallel through pipelines, and a second expansion valve is arranged at the inlet of the secondary refrigerant heat exchanger. An outlet of the secondary refrigerant heat exchanger is connected ...