CN2473513Y

CN2473513Y - Microwave water heater

Info

Publication number: CN2473513Y
Application number: CN 01239245
Authority: CN
Inventors: 史琪; 史玮
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-10
Filing date: 2001-05-10
Publication date: 2002-01-23
Anticipated expiration: 2011-05-10

Abstract

The utility model relates to a water heater which heats the water utilizing microwave energy and is suitable to be used in a household water heater and a drinking water machine. The utility model is characterized in that the microwave energy is outputted by a magnetron (2) through a waveguide outlet and passes by a section of an impedance transformer (3), and a load waveguide (4) with a large diameter is connected behind the impedance transformer, and a water load (5) which absorbs the microwave energy is arranged inside the load waveguide (4), and an end surface of the water load is connected into one body with a short board of a flange (6), and a water intake pipe (7) and a water outtake (8) are arranged on the end surface of the water load. The utility model has the advantages of high heating efficiency, being safe and convenient, the temperature of the out water being adjustable and automatic constant temperature, when being used in the drinking water machine, the utility model further has the effects of disinfection and sterilization, and can prevent the secondary pollution of barreled water, and belongs to a household appliance class.

Description

Microwave water-heater

The utility model relates to a kind of microwave energy that utilizes to the water heater that water heats, and is applicable to pot-type boiler, water dispenser, has characteristics such as thermal efficiency height, water outlet automatic constant-temperature and sterilization.

The water heater of Sheng Chaning in the market, mostly adopt electrical heating and gas firing method, and water dispenser generally all is to adopt electrical heating, this mode of heating thermal efficiency is all lower, heat time heating time is long, have suitable unsafe factor and arrive, particularly combustion gas takes place and poisons and murderous incident in the water heater of gas firing method often, be applied to electric heater on the water dispenser, because general family expenses bottled water germ-free condition can only keep one, two days, the time can't keep aseptic once long, also can produce secondary pollution simultaneously, and general three-person household, one barrel of water will be used a week, even longer, just can't guarantee that also pure water is clean only.

The purpose of this utility model is to have weak point in order to overcome various in the market water heaters and water dispenser, discloses a kind of microwave water-heater, utilizes micro-wave oven heating principle to design a kind of novel heater and water dispenser can heat, the consumption of sterilizing again.

In order to achieve the above object: the utility model is to consider like this: the microwave frequency that is produced f=2750MHZ or f=245MHZ by magnetron, microwave frequency is exported by magnetron waveguide mouth, through one section transition waceguide pipe, convert the heavy caliber waveguide to, a water load that can absorb microwave energy fully is housed in the heavy caliber waveguide, water load is wedgelike, length is 1/4th operation wavelengths, standing-wave ratio is controlled to be below 1.3, separate with dielectric material in the middle of the water load, making into, water and water outlet are divided into two the tunnel, waveguide mouth end face is equipped with a short circuit ring flange that has the chokes ring, be connected in one with water load on the ring flange, and water inlet pipe and outlet pipe are housed, after cold water enters water load, absorb microwave energy, water is heated, a temperature sensor is installed on outlet pipe, is gone to adjust the operating voltage of magnetron, make leaving water temperature keep constant by sensor.

The utility model is described in further detail below in conjunction with accompanying drawing:

Accompanying drawing 1 is a frame principle figure of the present utility model.

Accompanying drawing 2 is a structural representation of the present utility model.

Accompanying drawing 3 is the utility model water load structure front elevational schematic.

Accompanying drawing 4 is the utility model water load structure schematic top plan view.

Accompanying drawing 5 is looked schematic diagram for the water load structure right side.

With reference to the accompanying drawings 1, the utility model is by magnetron (2), magnetron power source (1), impedance transformer (3) and negative carrier conduit (4) and water load (5) ring flange short board (6) etc. partly form, power supply provides each grade voltage and current for magnetron work, make magnetron produce the hyperfrequency vibration, frequency of oscillation is 2750MHZ or 2450MHZ, because magnetron (2) output waveguide mouth is that 7.214 * 3.404cm (inside dimension) is littler, therefore connect one section impedance transformer (3) (being transition waceguide) after, when known waveguide width dimensions a and narrow limit size b, its equiva lent impedance Zc=b/a²－λ ²/4

If being transitioned into the waveguide of large-size is a₁×b ₁, Zc then₁＝b/a ₁ ²－λ ²/ 4, obtain the equiva lent impedance Zc of wide waveguide₁ Impedance transformer equiva lent impedance Z=Z then_c×Z _c1, can adopt λ g/4 gradually for simplicity Become waveguide, λ g is waveguide wavelength, and λ g=23.1cm during for f=2450MHZ is during f=2750MHZ λ g=16.64cm.

Water load (5) is wedge shape, maximum outer chi cross for the waveguide inside dimension be a₁×b ₁, with b₁Be transitioned into gradually b₁=0, wedge shape water load length is λ g/4, and its purpose makes water load and waveguide equiva lent impedance coupling, so that complete microwave energy absorbing, water load is at width a₁On be divided into two, Yi Bian be intake tunnel, another side Be exhalant canal, the material of water load can be with there being the penetration material to make to microwave, such as poly-Zellon, High-frequency ceramic, poly-stupid second is rare, lucite etc.

Water load maximum outside dimension end and metal flange dish (6) link together, ring flange has chokes ring (9) from duct width λ g/4 place, electrically contact with the proof load end face, be short circuit, prevent that microwave energy from leaking, in ring flange (6) outside, a water inlet pipe (7) and an outlet pipe (8) are housed, and communicate with water load, make water flow into load by water inlet pipe, absorb microwave energy after outlet pipe flows out.

Temperature sensor (10) is housed on outlet pipe, to measure coolant-temperature gage, when temperature is high, go to reduce the operating voltage of magnetron by control circuit, when temperature is low, improve the operating voltage of magnetron, also can control with hand switch, this selects knob identical with the micro-wave oven firepower, has not just repeated here.

Embodiment: adopting the magnetron operating frequency is 2450MHZ, magnetron inside dimension a=7.2cm, and b=3.4cm, wall thickness are 2mm, water load waveguide inside dimension is 19.558 * 9.77cm.Therefore transition waceguide is an impedance transformer, by a * b=7.2 * 3.4cm, is gradient to a ₁* b ₁=19.558 * 9.77cm, impedance transformer length 1=λ g/4=5.8cm, water load is with the rare material of doing of poly-tetrachloro, and wall thickness is 1.2cm, water inlet pipe and water outlet pipe PVC water pipe, the magnetron power output is 800W.Maximum pondage is 1/2 (19.558 * 9.77 * 5.8cm ³)=53cm ³If capacity will enlarge, then can strengthen the load waveguide dimensions and get final product.

Because microwave to lethal effect, therefore when microwave applicator is applied to present electric heating drinking water apparatus, has the sterilizing effect to bottled water to microorganism, bacterium, prevents secondary pollution.

Claims

1, a kind of microwave water-heater of forming by power supply (1), magnetron (2), it is characterized in that microwave energy is by magnetron (2) output waveguide mouth, through one section impedance transformer (3), after connect a heavy caliber negative carrier conduit (4), the water load (5) that absorbs microwave energy is housed in negative carrier conduit (4), water load end face and ring flange short board (6) fuse, and water inlet pipe (7) and outlet pipe (8) are housed above.

2, microwave water-heater according to claim 1 is characterized in that water load (5) is wedgelike, isolates with dielectric material in the center of width, forms intake tunnel and exhalant canal.

3, microwave water-heater according to claim 1 is characterized in that ring flange short board (6) inboard is split into chokes ring (9), makes ring flange and negative carrier conduit have excellent electric contact, prevents that energy from leaking.

4, microwave water-heater according to claim 1, its feature is equipped with temperature sensor (10) at the outlet pipe outer wall.

5, microwave water-heater according to claim 1, the material that it is characterized in that water load are pottery, lucite or the plastics that can have penetration to microwave.