32results about How to "Fast defrosting" patented technology

The utility model relates to the technical field of traffic monitoring, and provides an urban road traffic monitoring device which comprises a base and a monitoring mechanism. Through the arrangement of the air pump, the connecting pipe, the rotary spray head frame pipe and the high-pressure spray head, the air pump works to spray air out of the high-pressure spray head through the connecting pipe and the rotary spray head frame pipe, dust and impurities on the surfaces of the light supplementing lamp and the glass sheet are removed, and the shooting definition of the camera is kept; a motor works to drive a rack to enable a rotary spray head frame pipe to rotate, the angle of a high-pressure spray head is changed, a light supplementing lamp and a glass sheet are cleaned in all directions, the glass sheet, a sealing ring and a groove are arranged, the sealing ring is matched with the groove, the glass sheet is fixed, and external moisture is prevented from entering and affecting work of a camera; according to the utility model, the heater is arranged to heat gas, so that water vapor on the surfaces of the light supplementing lamp and the glass sheet can be dried, and quick defrosting can be realized through hot air after the surfaces of the light supplementing lamp and the glass sheet are frosted in winter.

The utility model discloses a defrosting air duct structure of a vehicle air conditioner and the vehicle air conditioner, and belongs to the technical field of vehicle air conditioning equipment.The defrosting air duct structure comprises an air supply outlet and air supply channels communicating with the air supply outlet, and the air supply channels comprise the first air supply channel, the second air supply channel, the third air supply channel and the fourth air supply channel; the first air supply channel is provided with a first air outlet facing left glass of a main driving position of a vehicle body, the second air supply channel is provided with a second air outlet facing front glass of the main driving position of the vehicle body, and the third air supply channel is provided with a third air outlet facing front glass of a co-driving position of the vehicle body. The fourth air supply channel is provided with a fourth air outlet facing right glass of the copilot position of the vehicle body. According to the defrosting air duct structure, respective corresponding glass can be independently defrosted, a driver or a co-driver does not need to adjust the air supply position of the defrosting air duct structure in the defrosting process, and a guarantee is provided for the driver to have an all-dimensional clear and good driving view.

The hot fluorine defrosting device of the air cooler comprises a multi-way valve body, a compressor, a gas-liquid separator, an evaporator and a condenser, two inlets are formed in the top of the condenser, two outlets are formed in the bottom of the condenser, the outlets are formed in the top and the bottom of the gas-liquid separator, one side of the gas-liquid separator is provided with one outlet, and the other side of the gas-liquid separator is provided with one outlet. Inlets are formed in the top and one side of the evaporator, an outlet is formed in the bottom of the evaporator, and a connector a of the multi-way valve body is communicated with an exhaust port of the compressor; the hot fluorine defrosting device of the air cooler has a refrigeration mode and a defrosting mode, the interface state is switched through the multi-way valve body, efficient circulation of efficient refrigeration and defrosting is achieved, the compressor, the evaporator, the condenser, the gas-liquid separator, the first expansion valve and the second expansion valve work cooperatively, and rapid defrosting can be completed without an external heat source.

According to the cascade type active enhanced vapor injection heat pump system and the control method thereof, the first stage is a low-temperature-stage conventional enhanced vapor injection heat pump, the supercooling degree is improved through conventional enhanced vapor injection so as to absorb more air energy, and a heat source is provided for the evaporation side of a second-stage high-temperature-stage heat pump; heat storage hot water is generated through heating of the low-temperature-stage heat pump and serves as an external heat source for active enhanced vapor injection of the second-stage high-temperature heat pump; the second stage is a high-temperature-stage active enhanced vapor injection heat pump, heat storage heat is converted into heating capacity in the form of injection enthalpy difference, and the performance of the heat pump unit is greatly improved. Besides, during defrosting of the system, the high-temperature-stage heat pump system does not participate in defrosting and keeps heating operation, the low-temperature-stage heat pump system performs heat storage defrosting through heat storage heat, enhanced vapor injection is performed in the defrosting process, the refrigerant circulation amount participating in defrosting operation is increased, the low pressure is increased, the defrosting speed is increased, and the defrosting effect is improved. And the exhaust superheat degree of the compressor in the defrosting process can be improved, and compressor damage caused by liquid return in the defrosting process is avoided.

The invention discloses an energy storage type heat pump structure which comprises a compressor. A condenser; an evaporator; the pipeline assembly comprises a first pipeline, a second pipeline, a third pipeline, a heat exchange pipe, a first valve body and a second valve body, one end of the first pipeline communicates with an outlet of the compressor, the other end of the first pipeline communicates with a first branch pipe and a second branch pipe, the first branch pipe communicates with the first communicating opening, and the second branch pipe communicates with the second communicating opening; the second communication port is communicated with the inlet end of the heat exchange pipe through a second pipeline, and the second branch pipe is communicated with the inlet end of the heat exchange pipe; the outlet end of the heat exchange pipe communicates with the third communication opening through a third pipeline. The fourth communication opening is communicated with an inlet of the compressor; a first valve body is arranged on the first branch pipe; a second valve body is arranged on the second branch pipe; and the energy storage water tank exchanges heat with the heat exchange pipe. Defrosting operation is carried out through waste heat stored in the energy storage water tank, and the defrosting action can be carried out without absorbing indoor waste heat.

The four-season hot water unit capable of refrigerating in summer and heating in winter comprises a cold-warm hot water machine and a hot water system, the system is characterized in that hot water is free in summer, more than 70% of electricity is saved for hot water in spring and autumn, double heating is achieved, and hot water energy is used for defrosting; the cold-warm water heater forms a four-circulation loop through a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, a first hot water heat exchanger, a second hot water heat exchanger, four throttlers and a gas-liquid separator; an outlet of the compressor is divided into two paths which are respectively connected with the four-way valve and an inlet of the first hot water heat exchanger; a liquid outlet of the first hot water heat exchanger is respectively connected with second interfaces of the outdoor and inner air heat exchangers through a first throttler and a second throttler; a second interface, a third interface and a fourth interface of the four-way valve are respectively connected with second interfaces of the outdoor heat exchanger and the inner heat exchanger and the gas-liquid separator; the second heat exchanger is inserted between the indoor heat exchanger and the inlet of the third throttler; a second interface of the outdoor heat exchanger is connected with a liquid outlet of the second heat exchanger through a bidirectional throttler to form a four-circulation loop; the hot water system has three heat exchange modes of self-circulation, forced circulation and heating circulation, and hot water is discharged through water inlet jacking; the hot water heating loop comprises a hot water circulating pump, a second hot water heat exchanger, a first hot water heat exchanger, a second outlet of the three-way valve, a hot water fan heater and a hot water circulating pump; manual and self-control hot water, refrigeration and double heating modes are adopted for operation.

The utility model discloses an air source heat pump quick defrosting device which comprises an evaporator, a four-way reversing valve, a condenser and a compressor, a first outlet of the evaporator is connected to a first connector of the four-way reversing valve, and a second connector of the four-way reversing valve is connected to a first inlet of the condenser. A first outlet of the condenser is connected to a first inlet of the four-way reversing valve, a second outlet of the condenser is connected to a second inlet of the evaporator through the thermostatic expansion valve, the compressor is connected to a third connector of the four-way reversing valve, and when the surface temperature of the evaporator is lower than the set temperature, high-temperature exhaust gas generated by the compressor can enter the evaporator through the third connector and the first connector in sequence. A special defrosting flow path is adopted, and efficient defrosting can be achieved.

The utility model discloses a quick defrosting device of an air source heat pump, and particularly relates to the field of air source heat pumps, the quick defrosting device comprises an extension plate, a defrosting mechanism is fixedly connected above the extension plate, the defrosting mechanism comprises a stainless steel pipe body, and an extension pipe is fixedly connected above the stainless steel pipe body in a penetrating manner. Heat is dissipated through hot water in the stainless steel pipe body, then the whole box body is filled with the heat, the air source heat pump can be quickly defrosted, after defrosting is completed, the internal temperature is high, a user starts the fan to generate wind power, the motor is started, the spiral column drives the threaded sleeve and the fan to reciprocate, and the air source heat pump can be quickly defrosted. And meanwhile, an auxiliary sleeve moves on an auxiliary column, rapid heat dissipation is conducted on the interior of the box body, a third pump machine is started, water in a stainless steel pipe body is pumped out through an L-shaped pipe and input into a water storage tank to be recycled, rapid defrosting is conducted on the air source heat pump, resources are recycled, and meanwhile rapid box body cooling can be conducted after defrosting is completed.

The utility model relates to the technical field of evaporator fin defrosting, and discloses a refrigeration house defrosting device based on an air injection device, which is applied to an evaporator in a refrigeration house, and the air injection device comprises an air storage tank, an air compressor connected to one end of an air inlet of the air storage tank through a pipe, and a plurality of air nozzles connected to one end of an air outlet of the air storage tank through a pipe, an air pump is arranged between the air nozzle and the air storage tank, the air storage tank is arranged in the water storage tank, and the air nozzle is arranged towards fins of the evaporator. A certain amount of high-temperature water can be stored in the water storage tank, firstly, air is compressed into the air storage tank through the air compressor, then the air is heated, the air pumped out through the air pump is high-pressure, high-temperature and high-speed air, a row of nozzles in the evaporator inject air towards fins in the evaporator according to a certain direction, and the air is heated. And it is guaranteed that water drops in defrosting are collected to the water collecting disc, the fins are dried, and the overall defrosting efficiency is prevented from being affected.

The invention discloses an air conditioning unit with a defrosting mechanism in the technical field of air conditioning unit defrosting, which comprises a casing, an evaporator and a compressor are arranged in the casing, a heat absorbing pipe is wound on the outer side of the compressor, one end of the heat absorbing pipe is fixedly connected with an adjusting mechanism, a pump and an induced draft fan are mounted on the adjusting mechanism, and a speed regulating box is mounted on the casing. A first gear is installed on the speed regulating box, the speed regulating box is in transmission connection with the regulating mechanism, a flow guide groove is formed in the machine shell, a moving mechanism is arranged in the machine shell, a driving mechanism is installed in the machine shell, the driving mechanism is movably connected with the first gear and the moving mechanism, a moving frame is in threaded connection with the moving mechanism, and wiping cotton is installed on the moving frame. A plurality of nozzles are arranged at one end of the flow guide pipe, an extrusion mechanism is arranged in the flow guide groove, and a filtering mechanism is installed on the lower side of the machine shell, so that the cleanliness of the equipment is further guaranteed, and meanwhile, the cleaning efficiency of the equipment is improved.

The defrosting compact evaporator for the automobile air conditioner comprises an evaporator body, four sets of first mounting plates are fixedly connected to one side of the evaporator body, a first sliding rail is fixedly connected between the first mounting plates on the left side and the right side, and a first moving plate is slidably connected to the outer side of the first sliding rail; second mounting plates are fixedly connected to the outer sides of the first moving plates, second sliding rails are fixedly connected between the second mounting plates, second moving plates are slidably connected to the outer sides of the second sliding rails, mounting boxes are fixedly connected to the interiors of the second moving plates, and control grooves are formed in the interiors of the mounting boxes; an air inlet cylinder is slidably connected into the control groove, a horn mouth is fixedly connected to the side, away from the evaporator, of the air inlet cylinder, and when an automobile runs, hot air flowing through the evaporator can be collected, the frosting position can be heated in a targeted mode, and the quick defrosting effect is achieved.

The utility model relates to a hot nitrogen defrosting system. The hot nitrogen defrosting system comprises a heat exchanger, a chemical oil gas main pipeline; the number of the heat exchange cold boxes is two, and each heat exchange cold box is provided with a chemical oil gas inlet pipe and a chemical oil gas outlet pipe; a nitrogen defrosting line; a valve II is arranged on the nitrogen defrosting loop pipeline; due to the fact that the nitrogen defrosting pipeline and the nitrogen defrosting loop pipeline are both connected with the two heat exchange cold boxes in parallel, namely, a hot nitrogen defrosting system formed by the nitrogen defrosting pipeline and the nitrogen defrosting loop pipeline runs completely independently, compressor faults caused by refrigerant return air with liquid can be completely avoided, normal running of production equipment is powerfully guaranteed, and the nitrogen defrosting system is simple in structure, easy to operate and low in cost. Compared with the prior art, an original defrosting mode is optimized, the situation that the refrigerating effect is affected due to material mixing of a defrosting agent and a refrigerant is avoided, meanwhile, air entraining and pre-cooling defrosting operation of the same system can be carried out, and the problem of a tail gas treatment vacuum period caused by channel blockage is effectively solved.

The utility model discloses a novel automobile rear -view mirror anti -fog defrosting heating piece, including insulating layer, temperature control electric heating structure, non temperature control electric heating structure, double -sided adhesive layer, temperature control module and feed terminal. Temperature control electric heating structure and non temperature control electric heating structure staggered meanders, laminated in one side of insulating layer, and through double -sided adhesive layer and rear -view mirror adhesion. Temperature control module and feed terminal rivet pressure in the other side of insulating layer, and temperature control module is connected in series on temperature control electric heating structure. Non temperature control electric heating structure is with low -power sustained heating, to maintain the highest temperature state of mirror. Temperature control electric heating structure is controlled to temperature control module, can start according to temperature automatically. Like this can satisfy the requirement of electric heating heating piece's quick defrosting and the highest temperature must be lower than the safety temperature point. The utility model discloses through the cooperation of double circuit, has solved traditional heating piece energy consumption high, the highest heating temperature is too high, low -temperature section temperature rise too slow's problem, has the advantages of high -efficient defrosting, safe energy -conserving.

The application discloses an air conditioning system, and relates to the technical field of air conditioners, which can improve the comfort of users to some extent. The indoor unit is provided with an indoor heat exchanger; the outdoor unit comprises an outdoor heat exchanger, the outdoor heat exchanger comprises a first part and a second part; the indoor heat exchanger is connected with the outdoor heat exchanger through gas side pipes and liquid side pipes; the first part is defrosted by using refrigerant sensible heat, and the second part is defrosted by using refrigerant waste heat; wherein, the refrigerant sensible heat defrosting and the refrigerant waste heat defrosting are not simultaneously performed, the outdoor heat exchanger is divided into the first part and the second part by being divided into upper and lower parts, and the upper and lower heat exchangers can be alternately defrosted. The four-way valve is not reversed during the whole defrosting process, and the comfort of users is ensured.

The utility model discloses a steam defrosting type evaporator structure which is arranged in a refrigeration house and comprises a shell and a steam jet defrosting system arranged in the shell, a fan is arranged on the side wall of the shell, a fin heat exchange core body is arranged in the shell, the shell is further connected with a condensation water drainage pipe, and the condensation water drainage pipe is connected with an evaporator. The condensation drain pipe penetrates through the refrigeration house to be communicated with the outside; the steam jet defrosting system comprises an automatic water replenishing device, an instant steam generator, a steam pump, a steam conveying pipeline and a steam nozzle; the instant steam generator is respectively connected with the automatic water replenishing device and the steam pump, and the steam pump is communicated with the steam nozzle through a steam conveying pipeline; the steam nozzle is arranged at the top of the inner side of the shell, and the fin heat exchange core is located below the steam nozzle. The steam nozzle is arranged at the top, steam is jetted to the fin heat exchange core body on the lower portion, so that a frost layer is gradually melted from top to bottom, and the defrosting efficiency is improved.

The invention relates to the technical field of fluid, and provides a fluid storage device, an air conditioner and a defrosting control method.The fluid storage device comprises a shell, a guide sliding way and a valve element; the shell is provided with a storage cavity as well as an air port and a liquid port which are communicated with the storage cavity; the guide slide way is arranged in the storage cavity and communicated with the storage cavity, and the two ends of the guide slide way are communicated with the gas port and the liquid port; the valve element is movably arranged in the guide slide way and is suitable for being switched between a first position and a second position, and at the first position, the storage cavity stores gas, and the valve element seals the liquid opening; and at the second position, the storage cavity stores liquid, and the valve element seals the air port. According to requirements, gas or liquid can be stored, the function that one object has multiple purposes is achieved, the full-gas and full-liquid self-locking effect can be achieved, and the beneficial effects of being simple in structure, high in reliability and the like are achieved.

The utility model discloses a hot fluorine defrosting system for a laboratory, which comprises a shell and tube condenser, a compressor, an indoor evaporator and an outdoor evaporator, and a hot fluorine defrosting mechanism is arranged among the shell and tube condenser, the compressor, the indoor evaporator and the outdoor evaporator. The hot fluorine defrosting mechanism comprises a liquid supply pipeline which is installed on one side of the shell and tube condenser and connected with the indoor evaporator and the outdoor evaporator, and a first automatic ball valve is installed on the liquid supply pipeline. Relates to the technical field of enthalpy difference laboratories. According to the hot fluorine defrosting system for the laboratory, due to the arrangement of the hot fluorine defrosting mechanism, the shell and tube condenser of the system does not participate in work during defrosting, the outdoor evaporator is used for condensation instead of the shell and tube condenser, heat of an indoor test room is carried to the outdoor evaporator by the whole system, and the heat of the indoor test room is saved. A large amount of condensation heat is released to the outdoor evaporator, defrosting is thorough and rapid, the temperature rise of a room is extremely small, the defects that in a traditional defrosting mode, defrosting is not thorough, and consumed time is long are overcome, and the purpose of rapid defrosting is achieved.

The invention discloses a combined heat exchanger matched with a crude oil heating heat pump device, and belongs to the field of heat pumps and heat exchange. The combined heat exchanger comprises a condenser, a wrapping type flexible electric heating component and a phase change heat storage component. The wrapped flexible electric heating component is wrapped outside the condenser, the wrapped flexible electric heating component is connected with the power supply, and the condenser comprises a refrigerant channel and a crude oil channel; the phase change heat storage component comprises a refrigerant channel and a crude oil channel; a refrigerant channel of the condenser is communicated with a refrigerant channel of the phase change heat storage component; and the condenser crude oil channel is communicated with the phase change heat storage component crude oil channel. The three-in-one integrated design of the condenser, the wrapping type flexible electric heating component and the phase change heat storage component is adopted, multiple functions are integrated, the overall structure is greatly simplified, and remarkable technical advantages are shown in the aspects of heat exchange efficiency, anti-scaling treatment, system defrosting, energy efficiency improvement and the like.

The utility model discloses a waste heat recovery refrigeration house defrosting device assisted by solar energy, which comprises a condenser, an evaporator, a compressor and a heat storage agent storage device, and is characterized in that the condenser is fixedly communicated with the liquid inlet end of a throttle valve through a pipeline, the liquid outlet end of the throttle valve is fixedly communicated with the evaporator through a pipeline, and the compressor is communicated with the heat storage agent storage device through a pipeline. The evaporator is fixedly communicated with the compressor through a pipeline, the compressor is fixedly communicated with the condenser through a first heat exchange pipeline, the first heat exchange pipeline penetrates through the waste heat recovery heat exchanger, and the liquid outlet end of the waste heat pump is fixedly communicated with a liquid inlet in one end of the heat storage agent storage device through a second heat exchange pipeline. The second heat exchange pipeline penetrates through the waste heat recovery heat exchanger. According to the utility model, an energy solution of'waste heat + solar energy 'defrosting is adopted, additional energy consumption is not needed, the energy consumption required by defrosting is greatly reduced, and non-stop defrosting in the defrosting process is realized.

The utility model provides a refrigeration and defrosting system of a refrigeration house and the refrigeration house, the refrigeration and defrosting system of the refrigeration house comprises a compressor, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger and an electronic four-way valve, the indoor heat exchanger comprises a plurality of fins and a pipe unit, and an air outlet of the compressor is connected with a first input port of the electronic four-way valve; an air return port of the compressor is connected with a first output port of the electronic four-way valve, a heat exchange pipe of the outdoor heat exchanger is connected with a first transfer port of the electronic four-way valve and a second input port of the electronic expansion valve, and the pipe unit is connected with a second output port of the electronic expansion valve and a second transfer port of the electronic four-way valve. When the first input port is communicated with the first transfer port, the first output port is communicated with the second transfer port; when the first input port is communicated with the second transfer port, the first output port is communicated with the first transfer port. The refrigeration house is provided with the refrigeration house refrigerating and defrosting system, and the refrigeration house refrigerating and defrosting system has the advantages of being high in defrosting speed, good in defrosting effect and small in influence on the house temperature.

The present application relates to the technical field of heat pump, especially to a double-source heat pump system for optimizing defrosting, comprising a water system and a fluorine system. The fluorine system comprises a compressor, an exhaust four-way valve, a suction four-way valve, a user-side heat exchanger, a fin heat exchanger, a water-source-side heat exchanger, a wind-side electromagnetic valve, a water-side electromagnetic valve, a wind-side expansion valve and a water-side expansion valve. The fourth port of the suction four-way valve is a closed port. Through switching of the exhaust four-way valve and the suction four-way valve, and switching of the wind-side electromagnetic valve and the water-side electromagnetic valve, the system can cut off the user-side heat exchanger and use the water-source-side heat exchanger as an evaporator in the defrosting mode, so as to avoid influence of defrosting on water temperature of the user side.

The utility model relates to the technical field of air energy heat pumps, in particular to an air energy heat pump structure. According to the technical scheme, the heat pump is characterized by comprising a heat pump body and further comprising a base, the heat pump body is arranged on the base, a water storage cavity is formed in the top of the base, and a water outlet communicated with the water storage cavity is formed in one side of the base in a penetrating mode; and the cleaning mechanism is arranged on the base in a sliding mode and used for pushing the condensate water away to the drainage outlet, and the effect of reducing drainage faults generated by the unit is achieved.

The invention relates to a multi-angle defrosting system, a control method and a vehicle, and relates to the field of vehicles. The multi-angle defrosting system comprises a defrosting machine, an air inducing pipe, an A column decorating part and an air distributing pipeline. The A column decorating part is used for being installed on a vehicle body framework and is provided with a first air outlet. The air inducing pipe communicates with the defrosting machine and the air distributing pipeline, the air distributing pipeline communicates with the first air outlet, and fluid output by the defrosting machine sequentially flows through the air inducing pipe, the air distributing pipeline and the first air outlet. According to the multi-angle defrosting system, the technical problem that in the prior art, the defrosting efficiency of the front windshield of the passenger car is low is solved.

The utility model discloses a cold trap system for a vacuum device in a lithium battery cell baking area in the technical field of lithium battery production, and aims to solve the problem of low defrosting efficiency of a liquid nitrogen cold trap in the prior art. The system comprises a cold trap, a recovery tank, a circulating pump and a spraying assembly, the cold trap, the recovery tank, the circulating pump and the spraying assembly are in closed-loop connection through pipelines, the recovery tank comprises a second heat exchange pipe, the recovery tank heats condensed NMP and water through the second heat exchange pipe by means of waste heat of an air compressor, and the heated NMP and water are conveyed to the spraying assembly through the circulating pump and sprayed into the cold trap through the spraying assembly. NMP exchanges heat with frost blocks in the cold trap, quick defrosting is achieved, and condensed NMP and water flow into the recovery tank. According to the system, NMP and liquid nitrogen can be captured and recycled, rapid defrosting is achieved, and the system is economical and environmentally friendly.

The heat exchange structure for the freeze-drying bin relates to the field of freeze-drying bins and comprises the freeze-drying bin, a water storage tank is arranged on the right side wall of the freeze-drying bin, a self-priming pump is arranged on the bottom wall of the water storage tank, and a cold trap device is arranged on the inner wall of the freeze-drying bin. According to the scheme, the freeze-drying bin, the water storage tank, the self-priming pump and other devices are arranged to be matched, cold trap defrosting and heating plate cooling can share one water pool conveniently, heat exchange can be carried out when the two functions are operated at the same time, and therefore the purposes of rapid defrosting and cooling are achieved, operation of other cooling or heating equipment is not needed in the period, and the cost is reduced. The purpose of saving energy is achieved; through cooperation of the heat exchange pipe, the self-priming pump, the heat exchange plate and other devices, the contact area of water and the heat exchange plate can be increased through wavy arrangement of the device, heat exchange through water is facilitated, the inner wall of the cold trap device can be defrosted conveniently through spiral attachment, and the heat exchange efficiency can be improved.

The invention belongs to the related technical field of heat pump systems, and discloses an air source heat pump system and a defrosting control method thereof.The system comprises a circulation loop formed by a compressor, a four-way valve, an indoor heat exchanger, an electronic expansion valve and an outdoor heat exchanger, and further comprises a first bypass, a second bypass, a bypass valve and an electromagnetic valve. The first end of the first bypass is connected between the four-way valve and the indoor heat exchanger, the second end of the first bypass is connected between the electronic expansion valve and the outdoor heat exchanger, the first end of the second bypass is connected between the indoor heat exchanger and the electronic expansion valve, and the second end of the second bypass is connected between the outdoor heat exchanger and the four-way valve. A first bypass valve and a second bypass valve are arranged on the first bypass and the second bypass respectively, and the electromagnetic valve is arranged between the first end of the first bypass and the indoor heat exchanger. In the defrosting mode, the first bypass valve and the second bypass valve are opened, the electromagnetic valve and the electronic expansion valve are closed, the four-way valve is not reversed, heat is not taken from a room during defrosting, a refrigerant of the compressor is effectively supplemented, and the defrosting speed is increased.

This invention discloses an ultra-high reflectivity, high weather resistance, and frost-resistant sandwich reflector for concentrating solar collectors. An anti-frost and snow-resistant superhydrophobic coating is located on the upper surface of ultra-clear semi-tempered float glass. A first anti-reflection layer is located on the lower surface of the ultra-clear semi-tempered float glass. A reflective layer is located on the lower surface of the first anti-reflection layer, an anti-reflective layer is located on the lower surface of the reflective layer, a metal-doped absorbing layer is located on the lower surface of the anti-reflective layer, and a second anti-reflection layer is located on the lower surface of the metal-doped absorbing layer. A fully tempered float glass support is bonded to the second anti-reflection layer on the lower surface of the ultra-clear semi-tempered float glass using a vacuum lamination process, forming a sandwich concentrating reflector. The edges of the sandwich concentrating reflector are sealed with an edge sealant. This invention not only ensures a reflectivity of 95.5-97% but also exhibits strong weather resistance, significantly reducing the defrosting time in winter, daily cleaning time and frequency, and slowing down the decay of reflectivity, thus extending its service life.

The utility model discloses a low-temperature anti-freezing spheroidal graphite pipe fitting which comprises a pipe body, a plate seat, an air connecting end, a flange plate and a heat preservation sleeve, and the plate seat is arranged on the surface of the pipe body; the air connecting end heads are symmetrically arranged on the surface of the plate seat and are communicated with the interior of the plate seat; the flanges are arranged on two end surfaces of the pipe body; the heat preservation sleeves respectively sleeve the surface of the pipe body and the surface of the plate seat; the heat preservation sleeve is fixedly connected with the surface of the plate base through a quick fastener. Therefore, the cold resistance and freezing resistance of the pipe body can be effectively improved through the heat preservation sleeve, the heating mechanism is arranged in the pipe body, frozen liquid in the pipe body can be quickly thawed by supplying power to the heating mechanism to enable the heating mechanism to operate and emit heat, and the pipe body can be suitable for various extreme weather conditions; the device is further provided with an air connecting end, hot air is circularly injected into the plate base through the air connecting end, frozen liquid in the pipe body is quickly thawed, and the use effect is good.

A heat pump cycle device is provided with a compressor (11), an upstream-side branch section (12a), a heating section (13), an outside air heat exchange section (15), an upstream-side pressure reduction section (14a), a downstream-side pressure reduction section (14c), a bypass passage (21a), and a bypass-side flow rate adjustment section (14d). In a heating mode for heating an object to be heated, the refrigerant decompressed by the upstream-side decompression unit (14a) is caused to flow into the outside air heat exchange unit (15), and the refrigerant is caused to absorb heat of outside air in the outside air heat exchange unit (15). In a defrosting mode in which frost in the outside air heat exchange unit (15) is removed, the refrigerant branched at the upstream branch unit (12a) is caused to flow into the outside air heat exchange unit (15) to dissipate heat, and the refrigerant decompressed at the downstream pressure reduction unit (14c) is mixed with the refrigerant flowing out from the bypass flow rate adjustment unit (14d) to be sucked into the compressor (11).

A multi-terminal, low-temperature, high-efficiency CO2 transcritical air-source heat pump system is disclosed, comprising a heat pump circulation system, a water circulation system, and a domestic hot water circulation system. This invention ensures both indoor heating and convenient domestic hot water production, guaranteeing stable and efficient operation throughout the year. The multi-terminal indoor heating system connects low-temperature and high-temperature heating terminals in series at the water tank outlet, controlled by four shut-off valves. This satisfies residents' comfort requirements without excessive waste, achieving two goals at once. In winter, when frost forms on the evaporator surface, the system can defrost quickly without significantly impacting the system, ensuring normal operation within its reasonable operating range. This invention, as a multi-terminal, low-temperature, high-efficiency CO2 transcritical air-source heat pump system, solves the problems of low efficiency and high defrosting costs associated with existing heat pumps.