40results about "Fluid circulation arrangement" patented technology

The present invention relates to a refrigeration or air-conditioning apparatus which utilizes a vapor compression refrigeration system having a refrigerant circulating therethrough that comprises a compressor powered by an engine exhaust gas driven turbine. A mini centrifugal compressor may advantageously be used with such an apparatus, thus allowing the use of low GWP refrigerants. The present invention further relates to methods for powering a compressor, such as a mini-centrifugal compressor, in a refrigeration or air-conditioning apparatus, and methods for controlling compressor surge, impeller speed and cooling capacity.

The invention relates to a cascade heat pump drying system and a control method thereof. The cascade heat pump drying system is composed of a high temperature stage loop and a low temperature stage loop. Refrigerating fluid R134a is used in the high temperature stage loop, and refrigerating fluid R744 is used in the low temperature stage loop. Operation of the high temperature stage loop and the low temperature stage loop can be controlled according to the environment temperature so that the system can work normally within the wide environment temperature range from -20 DEG C to 43 DEG C, and the use requirement can be met.

A device for cooling a heat source of a motor vehicle is provided that includes a cooling body which has a plurality of feed flow channels and a plurality of return flow channels. At least a multiplicity of the feed flow channels and return flow channels are arranged adjacent to one another in an alternating fashion in the cooling body.

A subcooling heat exchanger and subcooling expansion valve in a refrigeration system provide subcooling of a pre-subcooled portion, for refrigerating a thermal load, of condensed refrigerant liquid by a pre-subcooling portion of the condensed refrigerant liquid. The amount of subcooling of the pre-subcooled portion is determined by measuring, with a pressure sensor, refrigerating suction pressure exerted by refrigerating compressors of the system. A controller then controls, based on the refrigerating suction pressure, modulation of mass of pre-subcooling portion, relative pre-subcooled portion, and expansion thereof in the subcooling expansion valve, which controls the amount of refrigerant heat exchanged, and therefore subcooling of pre-subcooled portion, between the pre-subcooling portion and the pre-subcooled portion in the subcooling heat exchanger. The pre-subcooling portion is then subsequently compressed by a subcooling compressor.

The invention discloses a flash evaporator which utilizes a cooling oil line of a compressor to heat an internal volume. The flash evaporator comprises a shell, a liquid refrigerant inlet, a liquid refrigerant outlet and a refrigerant vapor outlet, wherein the shell defines the internal volume; the liquid refrigerant inlet is communicated with a fluid in the internal volume; the liquid refrigerant outlet is communicated with the fluid in the internal volume; and the refrigerant vapor outlet is communicated with the fluid in the internal volume. The flash evaporator is characterized in that the flash evaporator further comprises a heating device for heating the internal volume, wherein the outlet of the heating device is communicated with the inlet liquid of the cooling oil line of the compressor, and the inlet of the heating device is communicated with the outlet liquid of the cooling oil line of the compressor. The flash evaporator utilizes the cooling oil line of the compressor as the heating device of the internal volume, and accordingly, an additional heat exchanger for the cooling oil line is omitted. The structure of the cooling system is simplified, and the heat is recycled, so that energy is saved. The invention further relates to a cooling system utilizing the flash evaporator.

The invention discloses an air-conditioner and a method for switching the working mode of the air-conditioner. The method solves the problem of high noise generated when the working mode of the air-conditioner is switched in the prior art. The air-conditioner comprises an indoor unit, an outdoor unit and a liquid pipe, a low-pressure air pipe, a low-pressure air pipe valve, a high-pressure air pipe and a high-pressure air pipe valve connected between the indoor unit and the outdoor unit; the air-conditioner also comprises a liquid pipe throttling device, a low-pressure air pipe throttling device and a high-pressure air pipe throttling device, wherein the liquid pipe throttling device is connected in series in the liquid pipe; the low-pressure air pipe throttling device is connected in parallel with the low-pressure air pipe valve; and the high-pressure air pipe throttling device is connected in parallel with the high-pressure air pipe valve. By using the technical scheme, the pressureof a coolant can be changed stably, and heat expansion and cold contraction effects are reduced, so that the noise generated when the working mode of the air-conditioner is switched is reduced.

The invention discloses a self-operated three-way reversal valve. The reversal valve comprises a valve body, and a first piston, a second piston, a sliding guide and a sliding block which are arranged in the valve body, and a spring. A valve seat, an adaptor tube C, an adaptor tube E and an adaptor tube D which are arranged on the valve body form a receiving cavity together with a low-pressure capillary tube and a high-pressure capillary tube. The sliding block is arranged on the valve seat. The sliding guide is fixed with the sliding block. The sliding guide is connected with the first piston and the second piston to form a piston and sliding guide assembly which can move axially in the valve body. The spring is arranged between the second piston and a left end cap. The sliding block is provided with a radially limiting structure in the valve body. The radially limiting structure is as follows: the sliding block comprises a transverse structure and a vertical structure arranged above the transverse structure; and the bottom of the transverse structure is closely attached to the valve seat; a top surface of the vertical structure of the sliding block has a longitudinal groove; and top surfaces of twp convex parts of a convex shape of the groove are closely attached an inner wall of the valve body. The structure of the valve can improve heat tube circulation refrigeration efficiency and is high in efficiency and energy-saving.

The invention discloses an auto-cascade heat pump with a middle throttling element and an adjusting method thereof. The heat pump comprises a single compressor, a condenser, an air-liquid separator, a condensing evaporator, an evaporator and a throttling valve, wherein non-azeotropic refrigerants containing two or more components are adopted as refrigerants. On the circulation basis of an original auto-cascade heat pump, the middle throttling element is added, the refrigerants at a condenser outlet, which are in a less dryness and undercooling state, can be used for eliminating the negative influence of condenser outlet state change caused by working condition changes on the system performance and taking the effect of obviously optimizing the performance by adjusting the mass flow ratio of the high-boiling point refrigerant and the low-boiling point refrigerant enriched in a middle throttling degree reasonable distribution system. The invention has the advantages of good suitability, simple structure, energy-saving operation and great working temperature difference.

The objective of the invention is to provide an air conditioning device capable of improving heating starting performance or defrosting restorability. The air conditioning device is provided with a compressor which is used for compressing a refrigerant, an indoor heat exchange device through which the refrigerant compressed by the compressor flows in heating operation processes, an electric expansion valve through which the refrigerant condensed by the indoor heat exchange device flows, an outdoor heat exchange device through which the refrigerant expanded by the electric expansion valve flows, an external air temperature detection assembly which is used for detecting external air temperature, and a control part which is used for controlling opening degree of the electric expansion valve. The air conditioning is characterized in that the control part is used for fixing the opening degree of the electric expansion valve according to set time and set opening degree when the heating operation is started, and the opening degree is correspondingly changed based on the temperature difference between the temperature detected by the external air temperature detecting assembly and the air saturation temperature at an inhalation side of the compressor when the heating operation is started.

The invention discloses a method for preventing a valve core position of an electronic expansion valve from offsetting and a corresponding protective cover. According to the method for preventing the valve core position of the electronic expansion valve from offsetting, a protective cover capable of generating magnetism is arranged at the exterior of a valve body of the electronic expansion valve, and the valve core position of the valve body is prevented from offsetting due to vibration in the transport process by using the magnetism generated by the protective cover and an interaction force generated by a magnetic rotor in the valve body. The transport protective cover of the electronic expansion valve comprises a protective cover main body capable of generating magnetism, and the protective cover main body is provided with a hollow cavity matched with a sleeve of the electronic expansion valve. The magnetic rotor positioned in the sleeve of the electronic expansion valve and the protective cover main body positioned at the outer end of the sleeve are mutually attracted. The protective cover main body capable of generating magnetism is arranged at the exterior of the electronic expansion valve, and the magnetic piece in the protective cover main body can be mutually attracted with the magnetic rotor of the electronic expansion valve to fix the valve core during transporting; and the protective cover has the advantages of simple structure, convenience in use and capability of being reused.

The invention relates to a thermal expansion valve, belonging to the technical field of refrigeration control. The thermal expansion valve comprises an upper valve body, a lower valve body, a transmission rod and a valve core, wherein the upper valve body is provided with a first cavity, a second cavity and a pair of air return pipes; the lower valve is fixedly connected with the upper valve bodyand is provided with a pair of throttling pipes; the displacement of the transmission rod varies due to the influence of the temperature/pressure of a temperature sensing component; the valve core isarranged in the first cavity, and the displacement of the transmission rod controls the movement of the valve core so as to control the opening degree of a throttle port. The thermal expansion valve is characterized in that the directions of a refrigerant flowing across the throttle port are the same when the thermal expansion valve is in a forward throttling state and a backward throttling state. The invention overcomes the difference between forward throttling and backward throttling in the prior art, and can simultaneously prevent the refrigerant from generating nonuniform impact on the transmission rod during the throttling process, thus, the thermal expansion valve not only can increase the movement reliability of the transmission rod, but also can obviously reduce noise.

The invention discloses an ultra-low ambient temperature air source heat pump unit using the daily range of the outdoor temperature of a heat storage balance chamber. The heat pump unit comprises a quasi-secondary (two-stage) compressor, an indoor heat exchanger, an economist, a main electronic expansion valve, an outdoor heat exchanger, a first auxiliary electronic expansion valve, a second auxiliary electronic expansion valve, an energy storage water tank, a first solenoid valve, a second solenoid valve, a circulating water pump, a four-way reversing valve, and a gas liquid separator. Duringthe day, at the noon with the not very low outdoor temperature, the unit has excess heat stored in the energy storage water tank, when the outdoor temperature is very low at night, the unit uses thestorage heat to heat and gasify the compressor for gas supplement, the heat absorbed from the outside absorption of the unit is equivalent to the sum of the heat absorbed from the environment of the outdoor heat exchanger and the heat absorbed from the heat storage water of the gas supplement, when the operating state of the compressor is unchanged, the unit heat can be increased by 32% or higher,and the heat requirements in the ultra-low temperature environment of the unit are met, so that the daily range of the outdoor temperature is balanced.

The present invention relates to an air conditioner. The air conditioner according to the present embodiment has a refrigeration capacity of 11 kW to 16 kW, inclusive, and uses R134a as a refrigerant circulating therein, and since a refrigerant pipe therein is made of a ductile stainless steel material having 1% or less of a delta-ferrite matrix structure with respect to the grain size area thereof, the refrigerant pipe can maintain strength and hardness as good as or better than those of a copper pipe, while also maintaining good processability.

The invention relates to a refrigerating-type first-aid backpack heat-preservation system and a working method thereof. The refrigerating-type first-aid backpack heat-preservation system comprises a heat-preservation structure and a backpack, inserting strips are arranged at the end, close to the backpack, of the heat-preservation structure, inserting grooves are formed in the backpack, a cavity is formed in the backpack, the inserting grooves communicate with the cavity, the heat-preservation structure is internally provided with a heat-preservation cavity, through grooves are formed in the inserting strips and communicate with the heat-preservation cavity, when the backpack and the heat-preservation structure are not separated, the inserting strips are inserted into the inserting grooves, and the through grooves communicate with the cavity. By arranging the structure that the backpack and the heat-preservation structure can be separated, when objects in the backpack need to be used,the inserting grooves of the backpack only need to be separated from the inserting strips of the heat-preservation structure, sealing strips on the backpack are inserted into the inserting grooves, and thus the backpack can be taken away separately; and when the objects in the backpack need to be subjected to heat preservation, the backpack can be refrigerated through a refrigerating structure only by inserting the inserting strips into the inserting grooves, when the emergency situation occurs, refrigerated objects can be taken away at any time and can be subjected to heat preservation at anytime, and the refrigerating-type first-aid backpack heat-preservation system is suitable for the outdoor space and the indoor space.

The invention discloses a drying filter of an outdoor unit of an air conditioner. The drying filter is connected between capillary tubes and the outlet of a condenser. The drying filter comprises a cylindrical shell, an inlet of the drying filter is arranged at the lower end of the shell and is communicated with the outlet of the condenser, an outlet of the drying filter is arranged at the upper end of the shell and is communicated with the capillary tubes, an upper copper grid and a lower copper grid are arranged inside the shell, a drying agent is filled between the upper copper grid and the lower copper grid, and a bypass pipe is arranged between the upper end and the lower end of the shell and is used for communicating the upper end and the lower end of the drying filter. By adding the bypass pipe, ice blocking and dirt blocking phenomena are effectively avoided, and the rising of pressure and temperature of condensation, caused by the ice and dirt blocking phenomenon, is also effectively avoided, thereby improving system capacity and energy efficiency ratio.

The invention discloses a cooling device which comprises a compressor, a condenser, a throttle device and an evaporator. An outlet of the compressor communicates with an inlet of the condenser. An outlet of the condenser communicates with an inlet of the throttle device. An outlet of the throttle device communicates with an inlet of the evaporator. An outlet of the evaporator communicates with an inlet of the compressor. The cooling device further comprises a liquid pipe and a liquid container. The liquid pipe is provided with a heat exchange segment fixed relative to the evaporator. A liquid outlet and a liquid inlet of the heat exchange segment communicate with the inner space of the liquid container, and therefore a liquid circulation flow path is formed, and the liquid container is further provided with a cold liquid outlet. The cooling device comprises a temperature detection device, and the temperature detection device can directly or indirectly detect the temperature parameter of liquid at the liquid container or the liquid pipe. According to the cooling device, by means of the arranged liquid container and liquid circulation flow path, the liquid container can store low-temperature liquid cooled by the evaporator, and the low-temperature liquid can be provided to be used in time when use requirements exist.

The invention discloses an air conditioner heat exchange pad system. The system comprises a refrigerant circulation system, a medium circulation system and a heat storage member; a refrigerant is circulated in the refrigerant circulation system; the medium circulation system involves a heat exchange pad and a medium containing part, wherein the heat exchange pad comprises a pad body and a medium circulation pipe, a part of the medium circulation pipe is arranged in the pad body in a penetrating mode, the medium circulation pipe is in communication with the medium containing part, and a mediumin the medium containing part exchanges heat with the refrigerant in the refrigerant circulation system; and the heat storage member is connected with the medium containing part. According to the airconditioner heat exchange pad system, the refrigerant is utilized to perform heat exchange with the medium, when the medium flows through the heat exchange pad, the temperature of the heat exchange pad can be changed, the overall energy consumption is low, and the safety is high; and the arranged heat storage member is beneficial to reducing the energy consumption of the device on one aspect and also can prevent the temperature fluctuation of the medium in the heat exchange process from being too large on the other aspect.