CN1115471C - Cooler with water jacket for engine - Google Patents
Cooler with water jacket for engine Download PDFInfo
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- CN1115471C CN1115471C CN00112318A CN00112318A CN1115471C CN 1115471 C CN1115471 C CN 1115471C CN 00112318 A CN00112318 A CN 00112318A CN 00112318 A CN00112318 A CN 00112318A CN 1115471 C CN1115471 C CN 1115471C
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Abstract
The present invention discloses a motor cooling device with a cooling water jacket. The present invention is mainly characterized in that a water jacket closed in a water jacket cover takes filled oil, etc. as a cooling medium and a superconductive heat transferring element (a heat pipe) and a radiator as radiating elements. The present invention has the advantages of water cooling and air cooling and the characteristics of a motor having uniform cooling, proper cooling effect, no water supply at ordinary times, no water drainage in winter, simple structure, convenient maintenance, strong natural environment adaptability, high heat efficiency, low exhaust emission concentration, low noise, etc. The present invention is a great improvement with obvious characteristics for the motor cooling device.
Description
Technical field
The invention belongs to engine manufacturing technology, be specifically related to a kind of the have single cylinder that comprises cylinder body water jacket and the cylinder head water cooling jacket in being enclosed within or the cooling unit of twin cylinder engine.
Background technique
In the prior art, the type of cooling of single cylinder or double-cylinder horizontal motor has water-cooled and air-cooled two kinds.Water-cooled single cylinder or twin cylinder engine adopt natural convection type cooling unit usually, this device takes water tank to be set directly at the structure of water jacket top, and the opening of water tank bottom is corresponding with the opening on water jacket top, thereby water tank cavity communicates with the water jacket inner chamber, during operation, cool off with the type of cooling of nature.(the 45th page to the 48th page) is further divided into evaporation water-cooled, condensing water-cooled and do not have three kinds of forms of pump water radiator cooling the working state by cooling water of this class cooling unit in " the S195/S1100A/D180 diesel engine uses and maintenance " book of Beijing science tech publishing house in August, 1989 public publication.Also there are small part single cylinder or twin-tub generator to adopt pump circulation water type cooling unit, the structure that this device takes water tank and engine block branch to be arranged, the water jacket of motor is an enclosed construction, and cooling unit is made up of water jacket, turnover water pipe, circulating water pump, heat radiator type water tank and fan; Under the effect of water pump, the cooling water that carries the cylinder block heat flows out from water jacket, flows into water tank through pipeline, and the formed air-flow of fan is blown over the radiator of water tank from the outside and taken away the heat that cooling water passes to water tank, and the temperature of cooling water is reduced; The cooling unit complex structure of this structure, cost are higher, and volume is bigger, use on multi-cylinder engine usually.For water-cooled engine, according to statistics, cause because of water and water are improper such as incrustation scale, burn into bursting by freezing, fault such as boil, just account for the 20-50% of total failare, and being in operation frequently to add water, and that must discharge water winter is antifreeze, and operation is trouble rather, and warm-up period is long especially after driving, so that the cylinder cold grinding is decreased big.Especially because water tank and radiator can only be installed in top, motor top, and increase the height of motor, influenced and use the supporting of engine mechanical, lost horizontal engine advantage in height.Application number is that 93231194.6 Chinese patent application " tiltable is so that the engine high-efficiency cooling water tank of horizontal device " is a kind of water tank that is used to force the engine cooling apparatus of water cycle, though can overcome traditional radiator of water tank complex structure, fragile, radiating efficiency is low, need to force cooling fan and bring many unfavorable, it still can not overcome because of water and the improper many technical problems of bringing that never solve for a long time of water.It must possess parts such as water pump, turnover water pipe, water tank, thermostat in order to force water cycle cooling, then exists complex structure, cost higher when being used for single cylinder or twin cylinder engine, and volume is bigger, increases energy consumption, increases problems such as cost of use.
For blower cooled engine, exist the reinforcement potentiality poor, volumetric efficiency is little, and mean effective pressure is low, and cylinder diameter suffers restraints, the deficiency that noise is bigger.
And a good engine cooling apparatus should be that heat dissipation potential can satisfy the needs that motor turns round under various operating modes.When operating mode and changes in environmental conditions, still keep best chilling temperature, to guarantee engine reliable work.Yet, be water-cooled or air-cooledly all can not accomplish this point.Especially air cooling engine, when its operating mode changes, when for example the rotating speed steady load changes, because the constant then air quantity of fan of rotating speed is constant, so by big load design amount of cooling water, just may be cold excessively when little load; By little load design, then may be overheated when big load.And for example load is certain, and when rotating speed changed, parts were heated necessarily, but air quantity of fan is directly proportional with rotating speed.By high rotating speed design, may be overheated during the slow-speed of revolution; By slow-speed of revolution design, may be cold excessively during then high rotating speed.When outer atmospheric temperature changed, the high heat radiation of temperature was difficult, and it is overheated to be easy to; The temperature low heat emission is good, is easy to cold.Particularly during the big load of the slow-speed of revolution (as climbing, cross ditch etc.) often occur overheatedly, the reason that the problems referred to above produce is that fan is directly driven by motor.Unreasonable design makes cooling fan waste many available powers.
Summary of the invention
The objective of the invention is to the advantage of integrated water cold-peace cooling device for blower cooled engine, maximize favourable factors and minimize unfavourable ones, and provide a kind of engine cooling that makes even, cooling effect is reasonable, it is big to strengthen potentiality, and volumetric efficiency is big, and noise is low, mean effective pressure value height, and be applicable to drought and water shortage, cold plateau area, structure is simpler, the big engine cooling apparatus of Applicable scope that amount of maintenance is less is to overcome the deficiencies in the prior art.
The objective of the invention is to be achieved by the following technical solutions: it comprises engine cooling water jacket (comprising cylinder body water jacket and cylinder cap water jacket), and at the top of cooling jacket, be provided with and the airtight water jacket plug that combines of cooling jacket, in the chamber that cooling jacket and water jacket plug are constituted, be marked with nonaqueous cooling medium, on water jacket plug, be fixed with 1 superconduction heat transfer element at least, and the hot junction of superconduction heat transfer element is put by water jacket plug and is inserted in the nonaqueous cooling medium, and, installed radiator at the cold junction of superconduction heat transfer element.
Water jacket is the pith of water cooled engine cooling unit.After in water jacket, charging water, it is even that it then has engine cooling, good cooling results, it is big to strengthen potentiality, and volumetric efficiency is big, mean effective pressure value height, and can obviously reduce the noise of burning, based on the comprehensive advantage that water jacket had, also be convenient to the application of the present invention on available engine, so the present invention has still comprised water jacket (referring to cylinder body water jacket and cylinder cap water jacket).
Because the water cooled engine water is as cooling medium, is the root of the numerous faults of motor, so the present invention with mineral oil, or the aqueous solution of organic substance/inorganic matter, or vegetable oil, or liquid macroimolecule composite (azeotropic mixture) place of water is as cooling medium.Oil is heat conduction both, and the boiling point height, can improve the chilling temperature of motor, reduces thermal loss, improves combustion efficiency, reduces oil consumption and smoke intensity concentration; The condensation point of oil is low, can be antifreeze, can not corroding metal, non-corrosive, do not give birth to dirt, remain the good heat radiating after the oil contact; The saturated vapour of oil forces down, and is convenient to be sealed in the water jacket safe handling; The oxidation resistance of oil is good, long service life, and having added once oil can be for long-term use, and water-jacket space is little, little with oil mass, thus also very economical, and can overcome the worry that frequently adds water, discharges water.Cold oil is preferably selected conduction oil for use, because of its performance is good, is difficult for coking, but convenient in order to get, also available I. C. engine oil or diesel oil; And the flash-point of diesel oil is on the low side, adds the machine oil mixing and then can improve flash-point, and then its using effect is better.Certainly except above-mentioned mineral oil, the aqueous solution of organic substance/inorganic matter, as antifreeze liquid (as ethanol), antirust emulsified water coolant, MCT metalworking coolant, and vegetable oil, liquid macroimolecule composite (azeotropic mixture) etc. are all available.Oil and water ratio, the specific heat of oil is half of water, and ratio of viscosities water is big, and thermal conductivity is 1/3 of a water.As freezing mixture, oil is not as water.This deficiency of oil, the one, compensated by improving chilling temperature, the 2nd, improve whole rate of cooling by the superconduction heat transfer element and overcome.
Water jacket plug adopts good metallic material of thermal conductivity such as aluminium casting to make.On the lower plane of water jacket plug, be provided with several wing ribs, to improve the endothermic effect of water jacket plug.Being provided with screw on water jacket plug can be threaded with the hot junction of heat pipe; Also can be provided with through hole, adopt upper and lower nut and anti-leak packing ring to cooperate and tighten in conjunction with being connected; Be provided with in the heat pipe hot junction under the condition of heat absorption fin, then water jacket plug adopts " Hough " to opening structure, and adopts welding manner, and makes heat pipe and water jacket plug in conjunction with being connected.Water jacket plug is by the cooling medium storage chamber of screw and gasket seal and the sealing of water jacket composition.Heat absorption in the cooling medium is inserted in the hot junction of heat absorption fin and heat pipe, and the heat absorption fin plays the auxiliary heat pipe heat absorption.Be provided with an oiling and an oil level detection hole that is made of screw and screw on water jacket plug, available its detects the height of oil level.When non-refuelling, then screw in screw and make its sealing with screw.
Adopt the heat radiation form of Air cooler, make the present invention simple, reliable.Radiator can adopt flange-cooled entity structure.Can arrange radially radiating fin along the heat pipe length direction with reference to the heat sink design of Air cooler cylinder.Radiating fin can be opened otch, and otch is interspersed, to increase air turbulence.Radiator can or be threaded by suit with heat pipe; Radiator also can adopt by some finned superconduction heating surface bank permutation and combination structures.The rolled fin pipe that fin tube preferably copper aluminium is compound, i.e. copper aluminium composite screw garden fin tube, in light weight because of its good thermal conduction, thermal resistance is little.Also can select the acupuncture pipe for use, the weld tabs pipe, pipe with wound fin is worn the sheet pipe.The fin sectional shape can be rectangle, triangle or other shape, and fin structure is straight wing or ring wing.Fin tube can all have fin in two, also can have only one fin is arranged.
In order to realize that motor under various operating modes and weather conditions when changing, remains best chilling temperature, the present invention has also adopted temperature control cooling electric fan special procuring under the condition, and it is made up of the low tension fan and the temperature switch circuit of storage battery power supply.After engine temperature has surpassed certain setting value, just connect power supply, start fan blowing heat radiation, otherwise, then quit work.This is for vehicular engine, and energy-saving effect is particularly evident.And said temperature detect switch (TDS) can be the bimetal temperature detect switch (TDS), and this temperature detect switch (TDS) is set on the sidewall of engine cylinder-body or cylinder cap, and makes it can farthest correctly show solicitude for and experience the temperature in the cylinder and in time make correct reaction.And, can adopt the low-cost cooler of forming by flywheel fan and wind scooper, perhaps the belt transmission fan cooler for the motor of not charged bottle.The latter is made up of axial flow or centrifugal fan and transmission part.Transmission part comprises: fan pulley, Idle wheel, swing type tensioning mechanism, fan belt and flywheel belt pulley.Because the good heat dissipation effect of superconducting radiator (heat pipe) might be saved fan cooled, this will be determined on a case-by-case basis.
The key that the present invention is achieved its purpose is, has adopted the superconduction heat transfer element.The superconduction heat transfer element has been realized water cooling unit water jacket heat absorption form and Air cooler the combining of form of dispelling the heat.Also this just combination just makes cooling unit of the present invention have the strong point of Air cooler cooling unit and water cooling unit cooling unit concurrently, and has overcome both drawbacks.And tangible substantive distinguishing features and remarkable progress arranged.
The superconduction heat transfer element is being undertaken the heat that cooling medium in the water jacket is absorbed and is being delivered to the task that radiator cools off rapidly.Have multiple superconduction heat transfer element available, the present invention is heat pipe and inorganic heat conduction component preferably.Heat pipe is the metal tube of a sealing, and working medium is equipped with in inside, relies on the phase transformation of working medium and flow of steam to transmit heat; Inorganic heat conduction component adopts sealed tubular or tabular cavity body structure, and interior dress inorganic elements is made working medium, and through application of vacuum, utilizes vibration, the friction of molecule after inorganic heat-conducting medium is heated, and heat energy is wavy excites fast and transmit.These two kinds of superconduction heat transfer elements, its thermal resistance has the characteristic that goes to zero in diabatic process, the instant heating superconductivity.The equivalent heat-transfer coefficient is tens to several thousand times of silver.
If adopt integrally-built radiator, then used heat pipe is selected light pipe for use; If the radiator of employing tube bank permutation and combination structure then heat pipe can be used fin tube.Heat pipe can be selected two-phase thermosiphon or capillary wick type heat pipe or controlled heat pipe for use.Working medium in the heat pipe can be selected water, methyl alcohol, ethanol, pentane, heptan carbon, acetone, fluorine Lyons, ammonia, fluorocarbons or other chemical substance respectively for use.Working medium in the inorganic matter conducting tube is inorganic matter.The superconduction heat transfer element can adopt tubular structure, also can adopt tabular cavity body structure, and its material can be selected copper, aluminium, steel, stainless steel, aluminum alloy or their composite material respectively for use, compound or steel aluminium composite material etc. as: copper aluminium.Wherein the shell of tubular structure can be light pipe or fin tube or flexible tube.Fin tube can all have fin in two, also can be only one fin is arranged.Fin tube can be selected rolled tube, acupuncture pipe, weld tabs pipe, pipe with wound fin respectively for use and wear sheet pipe etc. by processing technology.The fin sectional shape can be respectively rectangle, triangle or other shape.Fin structure is straight wing or ring wing.Flexible tube is meant that the evaporator section (hot junction) of heat pipe and condensating section (cold junction) are rigid pipe, and flexible metallic hose (as corrugated flexible hose) is used in the adiabatic section.Do application of vacuum or micro-vacuum processing in the superconduction heat transfer element pipe or in the chamber or do not do application of vacuum.
The radical of the preferred superconduction heat transfer element of the present invention---heat pipe is selected, can be according to the nominal power of motor, and adopt the given formula of " diesel engine design handbook " (middle volume) that publishes and distributes by Chinese agriculture machinery publishing house to calculate and try to achieve.
That is: Qw=qNe
In the formula: the heat (kilocalorie/hour) that the Qw-Water Jacket is loose and
Ne-diesel engine nominal power (horsepower)
Q-is than heat dissipating capacity (kilocalorie/horsepower, hour)
Loose after the heat Qw that walks trying to achieve cooling jacket, again according to suction (loose) the heat QR of every heat pipe in the unit time, do to calculate and try to achieve the radical of required heat pipe, that is:
Required heat pipe radical Rg=Qw/QR=qNe/QR
Directly spraying single cylinder diesel with the S1100A natural aspiration is example, and its selection of parameter is as follows:
Q be 500 kilocalories/horsepower, hour;
Ne is 15 horsepowers.
∴ Qw=500 * 15=7500 kilocalorie/hour
And suction (loosing) the heat QR of copper-hydro-thermal pipe that internal diameter is Φ 21mm is:
QR=5 * 10-4 Kilograms Per Second * 2.31 * 106 joule/kilogram
=1155 joules/second=1155 watts (seeing also " heat pipe and heat-pipe radiator introduction " that Anming Heat Tube Technology Co., Ltd., Anshan edited and released on September 1st, 1997)
1 kilocalorie/hour=1.163 watts of ∵
1.163 * 7500=8722.5 watt
Required copper-hydro-thermal pipe radical Rg=8722.5 watt/1155 watts=7.55 (root)
∴ need get 8.
On the effective surface area of this diesel engine water jacket plug, there is leeway can arrange 8 copper-hydro-thermal pipe fully.
The selection of heat pipe radical required for the present invention also can be asked for according to the given formula of being published by Chinese agriculture machinery publishing house of " internal combustion (IC) Engine Design " institution of higher learning teaching material by Jilin Industry University Yang Liansheng chief editor.
Take a broad view of above description, the present invention has overcome water-cooled and air-cooled deficiency, has both water-cooled and air-cooled strong point, the engine cooling that is had is even, and cooling effect is rationally proper, need not to add cooling medium at ordinary times, preventing freeze in winter need not bleed off cooling medium, and is simple in structure, and maintaining is convenient, adaptability is strong, help improving oil firing performance in the cylinder, improve the thermal efficiency, reduce combustion noise, reducing characteristics such as toxic emission concentration, is conspicuous.Can think like this that the present invention is the significant improvement to a substantive distinguishing features that has remarkable progress and give prominence to of engine cooling apparatus.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention, has omitted water jacket part pattern among the figure.
Fig. 2 is another kind of structural representation of the present invention.
Fig. 3 is the third structural representation of the present invention.
Embodiment
One of embodiment, description be the present invention with a heat pipe, as showing, it is by water jacket 1 as Fig. 1, aluminium matter water jacket plug 2, conduction oil cooling medium 3, Φ 21mm copper-hydro-thermal pipe 4, hot junction heat absorption fin 5 and the superimposed cartridge type radiator 6 of cold junction fin are formed.Water jacket plug 2 is splits shape, and with heat pipe 4 solder bond, screw 9 blocks in available screw and anti-leak packing ring cooperation at ordinary times for refueling and the oil level detection hole.Water jacket plug 2 usefulness screws are twisted mutually by the former screw of putting the dress water tank of motor with the cooperation of anti-leak pad and are closed combination, are provided with the wing rib 8 that is used for improving endothermic effect in the bottom surface of water jacket plug 2.Present embodiment is applicable to that nominal power is at the motor below 2 horsepowers.
Embodiment's two, description have 2 above heat pipes, and a kind of the present invention that the cold junction and the radiator of heat pipe caused the motor side, as shown in Figure 2.Cold junction at copper-hydro-thermal pipe 4 is provided with fin radiator 6, and heat pipe 4 is tightened and combined with water jacket plug 2 by last lower nut and the cooperation of anti-leak packing ring.Where necessary, be provided with low pressure fan 7 (can not establish fan 7 when cooling effect is proper) in the side of radiator 6, heat pipe 4 and radiator 6 are installed in the appropriate location of motor side, if marine engine can be installed in heat pipe 4 and radiator 6 in the water.Low pressure fan 7 is controlled according to the temperature of setting by the bimetal temperature detect switch (TDS) that is installed on the cylinder cap sidewall, and fan 7 is powered by storage battery.Can certainly not establish temperature detect switch (TDS), use artificial hand switch, the Kai Heguan of control fan 7 and establish.Other is as one of implementing.Present embodiment can be widely used in nominal power at the motor more than 2 horsepowers.
Embodiment's three, description be to have many heat pipes, and on cylinder cap, be provided with the present invention of a section of heat pipe equally, as shown in Figure 3.Its copper-hydro-thermal pipe 4 and fin radiator 6 are installed in the top of water jacket plug 2, and above cylinder cap, also be provided with copper-hydro-thermal pipe 4 and fin radiator 6, and heat pipe 4 is by being located at the outside thread on its tube wall, cooperates and tightens with screw on being located at water jacket plug 2, and realize itself and the combining of water jacket plug 2.Side at fin radiator 6 is provided with fan 7, and this fan 7 is by the driving mechanism such as the air cooling engine fan, by motor from transmission.Other is all as embodiment's two.
Practical application of the present invention is installed, and is not subjected to the restriction of the foregoing description description.
Claims (10)
1, a kind of engine cooling apparatus with cooling jacket, it comprises engine cooling water jacket (1), it is characterized in that, top in cooling jacket (1), be provided with and the airtight water jacket plug that combines of cooling jacket (2), and in the chamber that cooling jacket (1) and water jacket plug (2) are constituted, be marked with nonaqueous cooling medium (3), on water jacket plug (2), be fixed with 1 superconduction heat transfer element (4) at least, and the hot junction of superconduction heat transfer element (4) is put by water jacket plug (2) and is inserted in the nonaqueous cooling medium (3), and, be provided with radiator (6) at the cold junction of superconduction heat transfer element (4).
2, the engine cooling apparatus with cooling jacket according to claim 1 is characterized in that, said nonaqueous cooling medium (3) is a mineral oil, or the aqueous solution of organic substance or inorganic matter, or vegetable oil, or the liquid macroimolecule composite.
3, the engine cooling apparatus with cooling jacket according to claim 2 is characterized in that, said mineral oil is conduction oil, or I. C. engine oil, or diesel oil, or the miscella of diesel oil and machine oil; And the aqueous solution of said organic substance or inorganic matter is antifreeze liquid, or the MCT metalworking coolant, or antirust emulsified cooling liquid.
4, the engine cooling apparatus with cooling jacket according to claim 1 is characterized in that, said superconduction heat transfer element (4) is an inorganic heat conduction component, or heat pipe.
5, the engine cooling apparatus with cooling jacket according to claim 4, it is characterized in that said heat pipe (4) is copper-hydro-thermal pipe, or steel-hydro-thermal pipe, or copper aluminium-hydro-thermal pipe, or steel aluminium-hydro-thermal pipe, or aluminium-ammonia heat pipe, or aluminium-acetone heat pipe, or aluminium-ethanol heat pipe, or steel-fluorocarbons heat pipe, or copper-water-imbibition core heat pipe, or steel-water-imbibition core heat pipe.
6, the engine cooling apparatus with cooling jacket according to claim 5, it is characterized in that, put the hot junction that is inserted in the cooling medium (3), be provided with heat absorption fin (5) at said heat pipe (4), and heat pipe (4) combines with water jacket plug (2), is solder bond.
7, the engine cooling apparatus with cooling jacket according to claim 1, it is characterized in that, on said water jacket plug (2), be provided with oiling and oil level detection hole (9) formed by screw, screw and anti-leak packing ring, and be provided with heat absorption wing rib (8) in the bottom surface of water jacket plug.
8, the engine cooling apparatus with cooling jacket according to claim 1 is characterized in that, the side in said radiator (6) is provided with fan (7).
9, the engine cooling apparatus with cooling jacket according to claim 8 is characterized in that, said fan (7) by motor from transmission, or low voltage motor transmission.
10, the engine cooling apparatus with cooling jacket according to claim 9, it is characterized in that, on the circuit of said low voltage motor, be provided with temperature detect switch (TDS) (10), and said temperature detect switch (TDS) (10) is set on the sidewall of the cylinder body of motor or cylinder cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00112318A CN1115471C (en) | 2000-06-02 | 2000-06-02 | Cooler with water jacket for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00112318A CN1115471C (en) | 2000-06-02 | 2000-06-02 | Cooler with water jacket for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1274043A CN1274043A (en) | 2000-11-22 |
| CN1115471C true CN1115471C (en) | 2003-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00112318A Expired - Lifetime CN1115471C (en) | 2000-06-02 | 2000-06-02 | Cooler with water jacket for engine |
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| Country | Link |
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| CN (1) | CN1115471C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101208922B1 (en) * | 2006-09-21 | 2012-12-06 | 한라공조주식회사 | A Heat Exchanger |
| CN101655047B (en) * | 2009-09-16 | 2011-02-09 | 重庆长安汽车股份有限公司 | Engine cylinder water-jacket cover plate with diversion function |
| CN104975897A (en) * | 2015-06-04 | 2015-10-14 | 同济大学 | Power generation system for cooling cylinder wall recovery smoke afterheat of gas engine based on heat conducting oil |
| US11214381B2 (en) * | 2015-08-07 | 2022-01-04 | Pratt & Whitney Canada Corp. | Aircraft heating assembly with liquid cooled internal combustion engine and heating element using waste heat |
| CN105483338B (en) * | 2015-12-23 | 2018-06-19 | 南京科润工业介质股份有限公司 | A kind of plant oil base quenching oil of fully biodegradable |
| CN114352400B (en) * | 2022-01-18 | 2023-08-18 | 潍柴动力股份有限公司 | Engine fault detection device and fault detection method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2158804Y (en) * | 1993-06-21 | 1994-03-16 | 赵学义 | Engine efficient cooling water-tank capable of inclining to horizontal position |
| CN1245280A (en) * | 1998-08-17 | 2000-02-23 | 刘甄 | Lithium bromide suction type heating and refrigerating combined machine set |
-
2000
- 2000-06-02 CN CN00112318A patent/CN1115471C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2158804Y (en) * | 1993-06-21 | 1994-03-16 | 赵学义 | Engine efficient cooling water-tank capable of inclining to horizontal position |
| CN1245280A (en) * | 1998-08-17 | 2000-02-23 | 刘甄 | Lithium bromide suction type heating and refrigerating combined machine set |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1274043A (en) | 2000-11-22 |
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