Patents
Literature
Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

10469 results about "Cold air" patented technology

Refrigeration control method, control device and variable frequency air conditioner

The invention discloses a refrigeration control method, a control device and a variable frequency air conditioner. The method comprises steps as follows: detecting the indoor temperature in the refrigeration operation process, calculating the indoor temperature difference, and performing PID (proportion integration differentiation) operation on room temperature according to the indoor temperature difference to obtain a first target frequency; comparing the indoor temperature with a set comfortable temperature; controlling a compressor according to the first target frequency if the indoor temperature is not lower than the comfortable temperature; if the indoor temperature is lower than the comfortable temperature, detecting the coil temperature of an evaporator of the variable frequency air conditioner, calculating the temperature difference between the coil temperature and a set coil target temperature to obtain a coil temperature difference, and performing PID operation on the coil temperature according to the coil temperature difference to obtain a second target frequency; controlling the compressor according to the smaller one of the first target frequency and the second target frequency. With the adoption of the refrigeration control method, the control device and the variable frequency air conditioner, the problem about refrigeration comfortlessness caused by cold air blown by an existing variable frequency air conditioner can be solved.
Owner:HAIER GRP CORP +1

Cryogenic refrigeration unit suited for delivery vehicles

An apparatus to refrigerate the cargo space of delivery vehicles. It provides an environmentally friendly alternative to conventional mechanical a/c and refrigeration units. Cooling is provided by controlled evaporation of a liquefied gas such as CO.sub.2 or nitrogen. Defrost and heating requirements, if needed, are provided by hot engine coolant or by electric heaters powered from the vehicle electrical system. Airflow for the evaporator and for circulation in the temperature controlled space is provided by a blower which is mechanically or electrically driven from vehicle power. This invention can also be applied to multi-temperature control applications. The apparatus is compact and is particularly suited for small inner city delivery vehicles. FIG. 1: The sketch shows an inner city delivery truck for which this invention is most suitable. Refrigerated goods are placed in roller cages that are designed to maximize cargo hauled by use of roller cages that extend to within 2 inches of the ceiling. The evaporator section of this invention is mounted at or near the front wall of the truck and is separated from the cargo by a vertical bulkhead. The conditioned air is delivered at the bottom of the truck to avoid top freeze of perishable cargo that is in close proximity to the ceiling. FIG. 2: This shows the piping schematic and is similar to the invention described in U.S. Application Serial No. 60/238,929 (the '929 application) incorporated herein by reference. FIG. 2 shows the engine coolant coil located ahead of the CO.sub.2 coil in the direction of airflow. This prevents the coldest air from coming in contact with the engine coolant--in the cooling mode the air leaving the CO.sub.2 coil can be as low as -50.degree. F. for frozen load applications and this may cause the engine coolant to start freezing. Arrangements must be made to circulate air between the two coils in defrost mode. One means to accomplish this is to place a damper at the outlet of the evaporator section and run the fans. The damper would be closed during defrost. Another method is to place the engine coolant coil on the discharge side of the CO.sub.2 coil and use a cut-out switch if the engine coolant temperature drops below a predetermined value. In this arrangement there is no need for the damper arrangement as the heat will rise to melt any frost on the CO.sub.2 coil. If electric heat is used for defrost and heating freezing of the engine coolant is not a concern and the heaters can be fastened to the discharge side of the CO.sub.2 coil. An electric stand-by mode can be provided to power the system for cooling, heating and defrost when the vehicle is parked with the engine off. A plug-in electrical cable can provide the power needed for the controls, the fans and for heating and defrost. The figure shows the electric heaters attached on the discharge side of the CO.sub.2 coil. Operation: Detailed description is in the '929 application except for the following: The evaporator section is designed for vertical installation to maximize cargo space. Air is discharged at the bottom but may be a conventional top discharge if needed for specific applications. Conventional methods can be used to provide defrost and heating. If engine coolant is used for a heat source, it is preferable to thermally isolate the CO.sub.2 coil from the engine coolant coil to avoid freezing the coolant. The evaporator blower may be located on the inlet side of the coils rather than as shown in the figures. Unique Features: 1. Absence of a conventional condensing section on the exterior of the vehicle makes this an ideal refrigeration unit for small inner city delivery vehicles. Many of the truck cabs are now almost full height (same as the truck body) and there is limited space for the condensing section. 2. Cold plates can be used and still maximize cargo cube. However, this invention has 30-40% less weight than comparable "cold plate" systems. 3. Other features are described in the '929 application.]
Owner:THERMO KING CORP

Refrigerator

In the related art refrigerator, its structure for supplying water to a dispenser and water tank was complicated. In addition, since an icemaker is installed in a refrigerating chamber of the refrigerator, there is a problem in that the water supplied into the icemaker is frozen. Furthermore, if the icemaker is installed in the freezing chamber of the refrigerator in which the refrigerating chamber is formed at a lower portion thereof and a refrigerating chamber is formed at an upper portion thereof, there is another problem in that it is difficult to control the temperature in the refrigerating chamber or ice-making capability of the icemaker is lowered. The present invention is directed to a refrigerator. According to an aspect of the present invention for solving the above problems, there is provided a refrigerator including a refrigerating chamber formed at a relatively upper portion of a refrigerator body and a freezing chamber formed at a relatively lower portion of the refrigerator body, which comprises an ice-making chamber which is partitioned in the refrigerating chamber by means of insulating walls and includes an icemaker for making ice and an ice storage for storing the ice made in the icemaker, a first heat exchanger for generating cold air to regulate the temperature in the ice-making chamber, and a second heat exchanger for generating cold air to regulate the temperature in the freezing and refrigerating chambers, wherein the first and second heat exchanger are components of a heat exchange cycle. According to the refrigerator of the present invention so configured, there are advantages in that the temperature in the refrigerating chamber can be accurately controlled, the loss of cold air can be minimized and the structures for supplying water into the icemaker and the dispenser can be simplified.
Owner:LG ELECTRONICS INC

Melting furnace slag quenching dry type granulation and sensible heat recovery generating system and method using same

The invention provides a melting furnace slag quenching dry type granulation and sensible heat recovery generating system and a method using the same and belongs to the technical field of steel metallurgy furnace slag treatment and complementary energy recovery. The melting furnace slag quenching dry type granulation and sensible heat recovery generating system provided by the invention comprisesa slag-receiving device, a high-pressure water-air pulverization furnace slag quenching and granulating device, a furnace slag slow-cooling device, a sensible heat recovery generating device and a waste gas purification treatment device. According to the invention, the melting furnace slag is quenched and granulated by utilizing the high-pressure water-air pulverization device, so that the melting furnace slag is rapidly cooled to be in a glassy state; and then through a water-cooled type vibration grid plate, the melting furnace slag in the glassy state is further subjected to heat exchange with cold air so as to facilitate the subsequent recovery of the sensible heat. By the system provided by the invention, the melting furnace slag is quenched and granulated, and the high-temperature sensible heat resource of the furnace slag is sufficiently recovered and is used for generation on the basis that the water activity quality of the furnace slag is not influenced.
Owner:NANJING KESEN KENEN ENVIRONMENT & ENERGY

Multi-split air conditioner system and quick-starting heat generation method

The invention discloses a multi-split air conditioner system. When the temperature of an indoor environment reaches the preset temperature, the multi-split air conditioner system is controlled through a controller of the multi-split air conditioner system to run in a standby-ready mode, a refrigerant circulates between a compressor and an air and liquid separator, the capacity output of the compressor is controlled, and the pressure of a refrigerant outlet of the compressor is maintained within certain range, so when the multi-split air conditioner system is restarted to generate heat, the phenomenon of raising the lower pressure of the refrigerant to the working pressure is avoided, the cold air prevention time of an indoor unit is shortened, and the better user experience can be obtained. In addition, by setting the time of the multi-split air conditioner system entering the standby-ready mode through the controller, when the time of entering the standby-ready mode reaches the preset value, the multi-split air conditioner system is controlled to enter the standby mode, and the compressor is closed, so as to save the electric energy. The invention also provides a quick-starting heat generation method suitable for the multi-split air conditioner system.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD

Air conditioner control method

The invention discloses an air conditioner control method. The air conditioner control method includes that enabling an air conditioner to enter a refrigerating mode, detecting the indoor temperature, and comparing with a set comfortable temperature; if the indoor temperature is higher than or equal to the comfortable temperature, calculating the indoor temperature difference, carrying out room temperature PID operation according to the indoor temperature difference to obtain a first target frequency, and controlling a compressor according to the first target frequency; if the indoor temperature is smaller than the comfortable temperature, detecting the temperature of an air conditioner evaporator coil, if the coil temperature is larger than a target coil temperature, controlling the compressor according to the first target frequency; if the coil temperature is less than or equal to the target coil temperature, lowering the current running frequency of the compressor to obtain a second target frequency, and controlling the compressor according to the smaller value of the second target frequency and first target frequency; detecting the human body temperature in the refrigerating process, and increasing the indoor target temperature when the human body temperature is abnormal. The air conditioner control method is capable of solving the problem of uncomfortable refrigeration of an existing air conditioner due to blowing cold air and capable of controlling flexibly according to the human body temperature.
Owner:WUHAN HAIER ELECTRONICS CO LTD

Circulation cold air apparatus for high voltage frequency conversion equipment

A cycle cold wind device used in the high pressure frequency conversion device, includes a high pressure frequency conversion device cabinet for the cooling process to the heating components in the cabinet, a heat exchange cabinet for the separating cool to the hot air by the water in the disk pipeline, an air intake connecting channel for delivering the hot air discharged from the high pressure frequency conversion device into the air inlet of the heat exchange cabinet, and an air outtake connecting channel for delivering the cold air discharged from the heat exchange cabinet into the air inlet of the high pressure frequency conversion device. The air in the high pressure frequency conversion device and the heat exchange cabinet constitutes a sealing space of the cold and hot air cycle flow through the air intake connecting channel and the air outtake connecting channel. The device is changed into the sealing door from the traditional high pressure frequency conversion device, then is added with a heat exchange cabinet and two vent channels, thereby better solving the defect on the heat radiation of the high pressure frequency conversion device, with the advantage of simple structure, practicality, low cost of the manufacture, the use and the maintenance, long service life and marked efficacy.
Owner:北京合康新能变频技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products