3421 results about "Cold medium" patented technology

The invention provides a circulating refrigerating method. As a refrigerant is expanded, the flow speed of the refrigerant is increased, kinetic energy is increased, pressure and temperature are reduced, the refrigerant absorbs heat of a cold medium in an evaporator to be evaporated, the cold medium releases the heat to reduce the temperature to achieve refrigerating, the refrigerant absorbing the heat is expanded, the flow speed is increased, the refrigerant enters a diffusion pipe to be compressed, the flow speed is reduced, the pressure and the temperature rise, refrigerant steam enters a condenser to be condensed into liquid, the refrigerant releases the heat to be condensed into the refrigerant liquid to enter a liquid pump so that refrigerating circulation can be formed, the evaporation degree of the refrigerant entering the diffusion pipe is not limited, water can be used as the refrigerant, the problems that the refrigerant like Freon destroys the atmospheric ozone layer, and equipment is corroded by a chemical absorption agent used in a liquid-steam absorption system in the refrigerating process are solved, the refrigerant absorbs the heat of the low-temperature cold medium in the evaporator, and releases the heat in the condenser through diffusion and temperature rising, the cooling medium obtains the heat, and the temperature rises to supply the heat. The invention provides a refrigerating circulating system.

The invention relates to a fluid heater for utilizing a heat pump, in particular to a control method for an electronic expansion valve of a heat-pump water heater and a control device thereof. The control device of the electronic expansion valve comprises a control unit and a stepping motor, wherein the output end of the control unit is connected to the stepping motor, the output shaft of the stepping motor is connected with the electronic expansion valve, the control unit comprises a controller, a driving circuit and a group of temperature sensors, the temperature sensors are fixed in a cooling-medium circulating loop of the heat-pump water heater, and the controller comprises a target superheat-degree setting module, an actual superheat-degree detecting module, a regulating-speed setting module and a driving-signal generating module. In the invention, the exhaust temperature, the water-tank temperature and the environmental temperature are comprehensively judged, a variable target superheat degree is set, the relation of the exhaust temperature and the opening of the electronic expansion valve can be correctly identified, and the requirements of different circulating flow quantities in the state of the variable working condition of the heat-pump water heater are met, thereby the high efficiency, the safety and the stable operation of the heat-pump water heater are achieved.

The invention discloses a method for generating by graded use of cold energy of liquefied natural gas, which comprises two parts of natural gas medium Rankine cycle and cold medium Rankine cycle, and is characterized in that vaporized natural gas and another refrigerant are taken as a generating working medium, the pressure of the natural gas medium and the refrigerant medium can be controlled to realize the multiple grades heat exchange with LNG, on one hand, a problem of large available energy loss during a process that the refrigerant recovers the LNG cold energy while Rankine cycle generating can be solved (compared with a conventional method, the method provided by the invention can increase the Rankine cycle efficiency by 60-80% through the usage of LNG cold energy generating), on the other hand, the pressurized cold energy carried by the liquefied refrigerant in the Rankine cycle through system integration can be reused, the utilization efficiency of the cold energy can be enhanced; simultaneously, the heat medium water is taken as a medium, a combustion gas-steam combined power plant near a receiving station is used for generating and the heat medium water is discharged to flue gas waste heat of atmosphere as a low-temperature heat source of cold energy generating, the generating efficiency of Rankine cycle can be enhanced, the waste heat utilization can not generate unfavorable influence on the generating efficiency of the combustion gas power plant, and the thermal pollution of flue gas waste heat on environment can be reduced.

The invention relates to a detector and a method for detecting the air condition cooling medium leakage. The detector comprises the following parts: a key input part used to input the user order, an indoor pipe temperature detecting part used to quote the insufficient condition of the cooling medium value by the temperature change and the frequency of the indoor heat transformer and controls the compressor and the driver outside the fan, a display part used to control the controlling signal and display weather the cooling medium value leakage is measured.

The invention provides an air conditioning system and a cold media adjusting method of the air conditioning system. The air conditioning system comprises an air conditioner; a detector, which is used for detecting working parameter when the air conditioner is in running; a cold media adjusting device, which comprises a first electromagnetic valve and a second electromagnetic valve; a liquid storage tank, of which inlet is connected to a pipeline between an outdoor heat exchanger and a throttle device through the first electromagnetic valve, and outlet is connected to a pipeline between a gas-liquid separator and a four-way valve through the second electromagnetic valve; a controller, which is respectively connected with the detector, the first electromagnetic valve and the second electromagnetic valve, and adjusts the cold media amount in a cold media circulating loop through controlling the first electromagnetic valve and the second electromagnetic valve when it judges that the cold media amount in the cold media circulating loop not satisfies the preset conditions according to the working parameter. The air conditioning system and the cold media adjusting method of the air conditioning system can adjust the cold media amount specific to loads under different working conditions, improve the running reliability, and improve the using comfort level.

The invention discloses a method and device and system for detecting air conditioner coolants. The detection method comprises the steps of detection A, detecting if air conditioner coolants are sufficient; detection B, detecting if an outdoor unit coolant pipe of the air conditioner is abnormal; detection C, detecting if a coolant pipe of the air conditioner is abnormal; detection D, detecting if the coolants of the air conditioner are excessive. If the detection results of the diction A, the detection B, the detection C and the detection D are all no, the state of the coolants of the air conditioner is judged to be proper. By means of the method and device and system for detecting the air conditioner coolants, the problems that in the prior art, the detection mode for the state of the coolants of the air conditioner is tedious, and efficiency is low are solved, so that the purposes of simplifying the detection mode of the coolants of the air conditioner and improving the detection effect are achieved.

The invention relates to the technical field of refrigerating components, in particular to a coiled parallel flow condenser for a refrigerator, which is bent into a multi-layer coiled shape by using aluminum flat pipe at a certain radius of arc. The condenser comprises a flat pipe, fins, an inlet pipe assembly and an outlet pipe assembly, and is characterized in that the flat pipe in a coiled shape is formed by multiple bending arcs and straight lines; radiation sheets are equipped between adjacent coiled flat pipes; radiation sheets on outer side on both ends are equipped with side plates; inlet and outlet ends of the flat pipe are connected with the inlet pipe assembly and the outlet pipe assembly, respectively; the inside of the flat pipe is equipped with multiple micro-passages through which refrigerant passes. The condenser is compact in structure, high in heat exchange performance in unit volume, small in flow resistance, less in material consumption, less in cold medium filling quantity.

The invention discloses a cold accumulation air conditioner system having test function, which comprises a refrigerant cycling system, a secondary refrigerant cycling system and an air conditioner chilled water cycling system; wherein, the refrigerant cycling system and the secondary refrigerant cycling system can interchange heat by an evaporator, the refrigerant cycling system and the air conditioner chilled water cycling system interchange heat by a heat interchanger, a preheater is internally filled with a heat transferring medium (such as water and the like), a cold accumulation barrel is internally provided with a cold accumulation ball or board which is internally encapsulated with cold accumulation materials, secondary refrigerant fluid passes through a gap flow passage outside the cold accumulation ball or board and interchanges heat with the cold accumulation materials in the cold accumulation ball or board, and refrigeration capacity is stored into the cold accumulation ball or board. The invention can be used for testing the performance of the cold accumulation air conditioner system under the working conditions of refrigeration, cold accumulation, cold release and normal cold supply, can test the low temperature air supply characteristics of the cold accumulation air conditioner system, and can test the characteristics of cold accumulation and cold release of an ice ball type or an ice plate type cold accumulation air conditioner system.

The invention provides a heat pump air-conditioning system and a control method thereof. The heat pump air-conditioning system comprises a refrigerant circulation loop formed by a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger which are connected through a pipeline, wherein a refrigerant heater and a first throttling device are sequentially connected in series with the pipeline between the four-way valve and the outdoor heat exchanger; the pipeline between the indoor heat exchanger and the outdoor heat exchanger is connected in series with a second throttling device capable of adjusting flow; the refrigerant heater and the first throttling device are further connected in parallel with a by-pass pipeline; the by-pass pipeline is provided with a control valve used for controlling on-off of the by-pass pipeline; the heat pump air-conditioning system further comprises a controller used for controlling flow of the second throttling device and actions of the control valve as well as opening or closing of the refrigerant heater. According to the heat pump air-conditioning system and the control method thereof, which are provided by the invention, a refrigerant heating control process is utilized to realize the operation mode, including refrigeration, heating or non-reversing defrosting, of an air conditioner, and the indoor heat exchanger can continuously supply heat while defrosting is performed, so that comfort of a room is ensured.

The invention provides a cooling system for the working face of the mine. The invention consists of a ground refrigerating unit, a cooling water recycling device, a cold wind preparing device and a cold wind conveying pipeline. The refrigerating unit and the cooling water recycling device comprise a compressor 7, a condenser 3, a throttle 8, a heat exchanger 10, a cooling water pond 1, and a fresh water pump 2. The cold wind preparing device is a wind spraying chamber 11, and uses the cold media water prepared by the refrigerating unit to spray the wind current, can comprises a wind-inlet grille 16, a wind outlet 20, a water squirting pipe 17, a nozzle 18, a breakwater 19, a wind chamber water falling pond 21, a general water inlet pipe 22, a general water outlet pipe 23 and the like. A plurality of rows of vertical water squirting pipes are arranged between the wind-inlet grille and the wind inlet, nozzles are arranged on the top of the water squirting pipes, and the general water inlet pipe introduces the cold media water of the refrigerating unit. The invention adopts the cold media water spray to process, and prepare the cold wind with the high wind volume, high temperature difference, high enthalpy difference; can reduce the times of the heat exchanging process, lower the heat transferring temperature difference, improve the whole efficiency, and reduce the cold volume waste of the middle course; thereby is applicable for cooling the high-temperature hot and harmful circumstance.

The invention discloses a power battery liquid-cooling apparatus. The liquid-cooling apparatus comprises a plurality of cooling apparatuses, wherein inlets of the cooling apparatuses are conducted; outlets of the cooling apparatuses are conducted; each cooling apparatus comprises a plurality of cooling plates; inlets of the cooling plates are conducted; outlets of the cooling plates are conducted; and a battery module or a battery cell is mounted on each cooling plate. According to the power battery liquid-cooling apparatus provided by the invention, all the cooling plates are arranged in parallel, so that a cold medium can enter each cooling plate by flow distribution to cool the battery module or the battery cell, and then the cold medium exits from the outlet of each cooling plate, gathers together and exits from the outlet of each corresponding cooling apparatus. Compared with the prior art that cooling apparatuses are arranged in series and a cold medium conveyed by a pipeline generates heat accumulation in a pipeline conveying process to cause low heat dissipation efficiency, the liquid-cooling apparatus has the advantages that due to the adoption of a parallel cooling mode, the heat accumulation of the cooling medium caused by an excessively long flow channel is reduced and the heat dissipation efficiency is improved.

The invention relates to a casting method of a cast steel cooling plate, which adopts a cast steel material to cast a cooling plate base body and a cooling water pipe. The casting method comprises the following steps: adding a slagging agent and a silicon iron alloy block in molten steel for casting steel; putting the cooling water pipe into a casting model, sheathing a pipe sleeve on the cooling water pipe and leading a liquid cold medium and a composite solid cooling medium to pass through the cooling water pipe; using molten steel for casting steel to cast the cooling plate base body, and casting the middle part of the cooling water pipe into the cooling plate base body; leading the casting model to be horizontal in the modeling process, leading a feeder head to be modeled lopsidedly toward one side and heightening one side of the feeder head of the model after the model is boxed; adopting an upper layer of inner sprue and a lower layer of lower sprue to carry out stepped casting so as to form sequential solidification; and cooling and disassembling the model. The casting method can effectively avoid the cooling water pipe from being penetrated in a fusing manner during the casting process, avoid air gaps from being generated between the base body and the cooling water pipe, avoids refusion and recrystallization, accurately realizes the microfusion of the outer surface of the cooling water pipe, prolongs the service life of the cooling plate, further prolongs the service life of a metallurgical high-temperature kiln, saves production cost and improves the cooling effect and the mechanical performance of the cast steel cooling plate.

The invention relates to a microchannel parallel-flow condenser, in particular to a high-working-pressure high-heat-exchange-rate parallel-flow condenser using CO2, R410a, 407C, R22 and other cold media. The condenser comprises two parallelly placed collectors which are a left collector and a right collector, a plurality of flat tubes which are arranged between the two collectors and are communicated with the inner cavities of the collectors, partition boards which are inserted into the collectors and airtightly divide the collectors into a plurality of chambers, end closures which are arranged at two ends of the collectors to seal the collectors, inlet and outlet pipes which are arranged on the collectors and side plates arranged on up and down two sides of the flat tubes. The condenser is characterized in that: fins extending and distributing in a sine wave are arranged between the flat tubes; the fins are arranged between the flat tubes and the side plates; the tube spacing is 9 to 11 millimeters; and the thickness of the flat tubes is 1.8 to 2.22 millimeters.

The invention provides a gas-liquid separator, an air source heat recovery system comprising the gas-liquid separator, a water chiller and a heat pump, wherein the gas-liquid separator can synchronously detect two liquid levels through arranging a low liquid level switch and a high liquid level switch, outputs two switching value signals, can very conveniently judges whether condensate is generated in part of heat recovery devices and whether a condensate cold medium is enough to be used by an economizer, discharges or does not discharge a liquid according to the situation that whether the liquid exists or not, and does not affect the operation of a main system. According to the invention, the water chiller and the heat pump completely solve the problem that as the condensate is formed on cold medium side of part of the heat recover devices of part of the conventional air source heat recovery unit, pressure drop of the pipeline is increased and further performance of the whole machine and oil return of the compressor are affected are solved. In addition, heat recovery capacity can be improved to a great extent, and system capacity and efficiency are also improved.

The invention relates to an air conditioner with independent humidity / temperature control and relates to the air conditioning technique. The air conditioner is characterized in that: the air temperature and humidity are independently controlled according to the user's requirement. With the popularization of various architecture energy-saving techniques, the proportion of heat load to moisture load is changed and the proportion of moisture load is increased relatively, and the importance of moisture load control is more outstanding. The independent humidity / temperature control technique can reduce cold control load of the air conditioner, improve comfort and precision of the air conditioner and remarkably reduce energy consumption. The air conditioner comprises an indoor unit and an outdoor unit. The indoor unit comprises a fan (1), an air-cooled heat exchanger (2), an air-air return heat exchanger (3), a cooling medium (4) and a humidity / temperature control mechanism (5). The indoor unit can be independently used in a central air-conditioning system. The air conditioner meets the national requirement for controlling temperature at 26 DEG C in summer, and is conducive to update of the air conditioning technique.

The invention discloses a rotating wheel moisture removal and cooling-plate radiation cooling combined air conditioning system and an air conditioning method thereof. The device comprises a rotating wheel moisture removing part and a cooling-plate radiation cooling part. A moisture-removing rotating wheel is used for removing the moisture load of the fresh air supplied to rooms, and then dry fresh air is supplied to air-conditioner rooms in a replacement ventilation mode; the cold medium generated by a refrigerating unit serves as the cold medium for the radiation cooling of an indoor cooling plate, and the radiated cold energy is used for removing the moisture and heat load in the rooms. The fresh air is supplied to the air-conditioner rooms in the replacement ventilation mode to keep the freshness of indoor air; meanwhile, the indoor air flow rate is low, so the blown feeling of the human body is eliminated, the majority of the cold load is eliminated by radiation heat exchange, the indoor temperature distribution is uniform and thus the indoor comfort degree is improved obviously. In the system, the moisture removal and cooling of an indoor environment are combined, both the indoor temperature and humidity are controlled accurately, and the indoor air quality is improved; meanwhile, due to the independent control of the humidity, the efficiency of a refrigerating unit is improved and energy is saved.

The invention discloses a method and a device for integrated utilization of natural gas pipe network pressure energy refrigeration and hydrate, wherein the method comprises the steps of carrying out shunting on the high pressure pipe network natural gas of a natural gas gate station; carrying out depressurization refrigeration on the natural gas which meets the instantaneous demand of urban pipe networks and storing the cold energy through cooling mediums; leading the depressurized natural gas to enter downstream urban pipe networks; leading another part of high pressure natural gas to enter ahydrate generation tower to generate natural gas hydrate slurry which flows into a hydrate storage tank for storage; using the cooling mediums in a low-temperature storage tank to provide cold energyfor the hydrate storage tank and the generation tower to generate the hydrate when in gas consumption trough; and heating to vaporize the hydrate in the storage tank for supplementing the downstreampipe networks when in gas consumption peak; and simultaneously applying the cold energy generated by the decomposition of the hydrate to cold water air conditioners and cold storages. The invention uses the natural gas pressure energy refrigeration to generate the natural gas hydrate, simultaneously applies the cold energy of the vaporization of the hydrate to air conditioners and cold storages, thus realizing the peak regulation function of the urban natural gas pipe networks and the electric network, and greatly improving the energy utilization efficiency.

The invention relates to an all-year cold supply chiller with natural cooling function. A compressor, an air connecting pipe, a condenser, a liquid connecting pipe, a throttling gear and an evaporator form a steam compression type refrigeration circulation loop; the evaporator, the air connecting pipe, the condenser arranged on the evaporator and the liquid connecting pipe, which are all in the steam compression type refrigeration circulation loop form a cold medium natural circulation loop by opening a heat pipe air valve on a heat pipe branch and a heat pipe liquid valve connected in parallel with the throttling gear, and closing a refrigeration air valve on an air suction pipe of the compressor. The all-year cold supply chiller can adopt an integral structure or a split structure, keeps the function of making air conditioning cold water in summer, can sufficiently utilize the natural cold energy of outdoor air to make cold water in transition seasons and winter, provides cold water for all-year cold supply areas, such as inner zone of buildings and highly heating areas, and has the remarkable advantages of simple structure, high efficiency and energy saving.

A personal air conditioning system that may be used, for example, to cool a tent. The personal air conditioning system includes a cooling lid that fits over a typical insulated cooler. The cooling lid includes a heat transfer tower that is configured to transfer heat from a cold medium, such as ice, that is located within the cooler to an area within the cooling lid. A heat sink is provided at the top of the heat transfer tower and at least partially within the cooling lid. A fan is configured to draw air into the cooling lid, across the heat sink, and out of the cooling lid. The cooled air may then be used for cooling of a tent or other compartment, for example, or may be directed to blow on an individual.

The present invention relates to a variable-volume variable-flow heat pump water heater. It includes the following several portions: variable-volume compressor system, outdoor heat exchanger, outdoor fan, by-pass electromagnetic valve, four-way valve, vapor-liquid separator, electronic expansion valve, exhaust temperature probe, environment temperature probe, external disk temperature probe, suction air temperature probe, outdoor controller, indoor control plate, control panel, indoor heat exchanger, heat-insulating water storage tank, water outlet temperature probe, internal disk temperature probe, water outlet tube, water inlet tube and correspondent refrigerant pipeline and communication line. Said invention uses the leaving water temperature as object, utilizes compressor / variable volume compressor / hot air by-pass method and uses electronic expansion valve to accurately regulate and control throttle so as to implement stability and energy economization of said system.

The invention provides an automatic regulation control method and device of a refrigerant amount, and an air conditioner, and belongs to the field of air conditioning. The automatic regulation deviceof the refrigerant amount comprises a compressor, an indoor heat exchanger, an orifice union and an outdoor heat exchanger that are sequentially communicated and form a refrigerant circulation loop, and further comprises a refrigerant amount regulation loop communicated with the refrigerant circulation loop, wherein the refrigerant amount regulation loop and the orifice union are arranged in parallel. Compared with the prior art, the automatic regulation control method and device of the refrigerant amount can control the circulating refrigerant amount in an air-conditioning system, ensures theoptimal refrigerant amount for the operation of the air-conditioning system and achieves heat exchange efficiency to the greatest extent.

The invention discloses a power battery heat management system and method for an electric vehicle, and belongs to the technical field of power battery heat management. When the temperature of a powerbattery is higher than a first threshold value, a first cooling circuit is connected, a cold medium gets to a condenser and then gets to a refrigeration exchanger through a compressor to conduct heatexchange with refrigerant, so that the cooled refrigerant enters the power battery for heat exchange, and it is achieved that the power battery is cooled in a high-temperature environment; when the temperature of the power battery is higher than a second threshold value and lower than the first threshold value, a second cooling circuit is connected, the refrigerant enters the power battery for heat exchange after being cooled by a cooler, and it is achieved that the power battery is subjected to liquid cooling at a general environment temperature; when the temperature of the power battery is lower than a third threshold value, a heating membrane is started, the power battery is heated up through heating of the heating membrane, and it is achieved that the power battery is heated in a low-temperature environment.

The invention discloses a uniaxial creep testing device and a uniaxial creep testing method for frozen earth with a temperature gradient. The device consists of a pressure cover, a height adjusting cushion block, a convex pedestal, an upper refrigerating plate, a lower refrigerating plate and heat insulation plates, wherein a piston and a vacuumizing channel are arranged at the upper part of the pressure cover in a sliding way, and refrigerating fluid circulating channels and a test lead wire channel are formed in the convex pedestal. In the testing process, the heat insulation plate, the lower refrigerating plate, a sample, the upper refrigerating plate, the heat insulation plate and the pressure cover are sequentially mounted on the convex pedestal, and the space between the convex pedestal and the pressure cover is sealed by an O-shaped seal ring; an adiabatic boundary condition required by the sample is realized by vacuumizing in the pressure cover; the vertical temperature gradient of the sample is realized by regulating cold medium temperatures in the upper refrigerating plate and the lower refrigerating plate; and a creep load required by the sample is realized by regulating the forced direction and size of the piston. According to the uniaxial creep testing device and the uniaxial creep testing method, a unidirectional stress state and the stable adiabatic boundary condition can be provided, and the device and the method are suitable for research of uniaxial creep characteristics of the frozen earth under the conditions of different temperature gradients and scales.

The invention provides a refrigerant flow regulating system of a multi-connected air-conditioning heat exchanger. The opening of an electronic expansion valve at the outlet of the heat exchanger is controlled, and the supercooling degree or superheating degree at the outlet of each heat exchanger is detected and controlled so as to regulate the refrigerant flow of each heat exchanger. The regulating method comprises the following steps: (1) starting the system; (2) acquiring data; (3) calculating the temperature difference; (4) determining whether the temperature difference exceeds the range; (5) calculating the variation value of the electronic expansion valve; and (6) finishing the regulation and operating normally. According to the invention, the refrigerant flow of each heat exchanger is regulated effectively, and the whole refrigerating effect of the air-conditioning system is improved.

The invention is an air conditioning system and the using method without demanding water to conduct heat. It adds a cold-producing medium pressing and transmitting device which is comprises cold-producing medium pump and the low pressure transmitting device in the system to replace the water cold medium transmitting device which comprises water, pump and the mid medium heat exchanging device, the invention reduces the secondary cold transmitting system to one time system.

The invention discloses a condensing pressure control device of an air conditioning unit and a control method thereof. The device comprises a ball valve arranged on a coolant pipeline of a heat exchanger, an adjustment mechanism used for adjusting the opening of the ball valve and a control mechanism used for controlling the actions of the adjustment mechanism, wherein the control mechanism comprises a source information acquisition module, an information storage module, a comparison module and a master control module. The condensing pressure control method for the air conditioning unit comprises that: acquired source information on the coolant pipeline of the heat exchanger is transmitted to the comparison module; the comparison module compares the received source information with pre-stored set information and transmits obtained comparison information to the master control module; and according to the comparison information, the master control module controls the adjustment mechanism to adjust the opening of the ball valve on the coolant pipeline of the heat exchanger. The condensing pressure control device of the air conditioning unit and the control method thereof provided by the invention are reliable in control, high in accuracy and system flexibility and capable of performing real-time monitoring, protecting the valve and being adapted to different compressors and different refrigerants.

The invention relates to an all-year cold supply chiller with natural cooling and cold-accumulation functions. A compressor, an air connecting pipe, a condenser, a liquid connecting pipe, a throttling gear and an evaporator form a steam compression type refrigeration circulation loop; by opening a heat pipe air valve on a heat pipe branch, a heat pipe liquid valve connected in parallel with the throttling gear and an evaporator liquid valve on the evaporator, the evaporator, the air connecting pipe, the condenser and the liquid connecting pipe are connected in sequence to form a cooling medium natural circulation loop; and by opening the heat pipe air valve, the heat pipe liquid valve and a cold-accumulation liquid valve, the air connecting pipe, the condenser, the liquid connecting pipe and a cold-accumulation trough are connected in sequence to form a cold medium cold-accumulation natural circulation loop. The all-year cold supply chiller adopts a split structure, keeps the function of making air conditioning cold water in summer, can sufficiently utilize the natural cold energy of outdoor air to make cold water and accumulate cold in transition seasons and winter, provides cold water for all-year cold supply areas, such as middle apical areas of buildings and highly heating areas, and has the remarkable advantages of simple structure, high efficiency and energy saving.

A thermoelectric conversion module includes a substrate and a plurality of thermoelectric conversion devices arranged on the surface of the substrate. The substrate is provided with a through hole formed to extend through the surface and the back thereof, and the thermoelectric conversion devices are arranged on at least one of the surface and the back of the substrate so as to enclose the through hole. The thermoelectric conversion device includes the thermoelectric conversion module, and a tube arranged to extend through the through hole of the thermoelectric conversion module and to allow a hot medium or a cold medium to flow therethrough. A method for manufacturing a thermoelectric conversion module includes a step of arranging a plurality of thermoelectric conversion devices on at least one of the surface and the back of a substrate having a through hole extending through the surface and the back thereof so as to enclose the through hole.

The invention discloses an air conditioner as well as a control method and device and belongs to the technical field of air conditioner defrosting. The air conditioner comprises a heat regenerating device; the heat regenerating device comprises a first heat exchange part and a second heat exchange part which can be used for heat exchange; the first heat exchange part is connected to a first refrigerant pipeline between an indoor heat exchanger and an outdoor heat exchanger; and the second heat exchange part is connected to an air return pipeline of a compressor. According to the air conditioner disclosed by the invention, the heat regenerating device is additionally arranged in an air conditioner pipeline, and the defrosting opening of a throttling device can be regulated according to the air return temperature of the compressor under the condition that a liquid refrigerant flows back to the compressor because the liquid inlet temperature of the outdoor heat exchanger is lower than an outdoor dew point temperature, so that the refrigerant flowing into the outdoor heat exchanger through the throttling device is adapted with the current defrosting condition; and the liquid refrigerant flowing back to the compressor is heated and vaporized by virtue of the heat regenerating device, so that the quantity of the refrigerant condensed into a liquid when flowing through the outdoor heat exchanger is reduced, and the safe and effective operation of the whole of the compressor and the air conditioner is guaranteed.