CN201476255U - Semiconductor thermoelectric water heater with waste heat recovery function - Google Patents

Abstract

The utility model belongs to a semiconductor thermoelectric water heater with a waste heat recovery function, which includes a shell, a conduction heat exchange chamber group with a cold water chamber and a waste water chamber, and a condenser chamber, a heating chamber, and a semiconductor thermoelectric module. Heating unit group, waste heat pool and water pump or sewage pump inside it, nozzle, water pipe and connecting pipe system. The utility model uses the waste hot water in the high-temperature section to preheat the input cold water to increase its temperature, and then further heats it through the heating unit group, thereby greatly reducing the usage of the semiconductor thermoelectric module, reducing the cost, and improving the temperature. the overall thermal efficiency. The thermal coefficient of the utility model can reach 2.5, and the energy saving is about 60%. Compared with the electric water heater of the background technology with the same specification, the thermoelectric module can be saved by 35-50%. Therefore, it has the characteristics of simple structure, high waste heat recovery and heating efficiency, remarkable energy saving effect, low production cost and operation cost, and safe and reliable use.

Description

Semiconductor thermoelectric water heater with waste heat recovery function

technical field

The utility model belongs to an electric water heater for bathing, in particular to an electric water heater which can recycle waste heat of waste hot water after showering (washing), and adopts a semiconductor thermoelectric module for subsequent heating.

Background technique

The electric water heaters commonly used at present, whether they are heat storage water heaters or fast heating water heaters, directly convert electric energy into heat energy to heat bathing water through resistance components, such as electric heating tubes; The loss is large and the water consumption is limited; while the latter has a large power load and often needs to set up a dedicated circuit; and both heaters (pipes) are placed in water, once the insulation layer is damaged (such as cracking, etc.) A dangerous accident will occur. Aiming at the above-mentioned disadvantages, a patent document with the notification number CN2558919Y and the invention name "Semiconductor Thermoelectric Water Heater" discloses an electric water heater with a heat pipe and a semiconductor thermoelectric module that can utilize part of the waste heat in the waste water. The water heater adopts the combination of heat pipe conduction technology and thermoelectric heat pump, that is, all the heating sections are heated by semiconductor thermoelectric modules, and the heat pipe evaporation section is set in the waste water box (pool), and the condensation section is set between the heat-absorbing ends of the two thermoelectric modules. Use the waste hot water after bathing to vaporize the working medium in the heat pipe in the evaporation section, and the vaporized working medium steam enters the heat pipe condensation section close to the heat-absorbing end of the semiconductor thermoelectric module (chip) to release heat and transfer it to It is installed at the heat release end of the heat exchanger to heat bath water; although this technology has the characteristics of heat generation coefficient of about 2.0, energy saving of 50% and no safety hazards, etc., due to the heat pipe system used in the waste heat recovery part and the heating section All semiconductor thermoelectric modules are used for heating, but there are disadvantages such as complex structure, high production cost and operation cost, low waste heat recovery and thermal efficiency, and its efficiency decreases with the increase of heating temperature difference.

Contents of the invention

The purpose of this utility model is to improve and design a semiconductor thermoelectric water heater with waste heat recovery function in view of the disadvantages of the background technology, so as to achieve the purposes of simple structure, waste heat recovery and high thermal efficiency, low production cost and operation cost, and safe and reliable use. .

The solution of the utility model is based on the background technology, and the method of setting the evaporation section of the heat pipe in the waste hot water box (pool) and the condensation section between the heat-absorbing ends of the two thermoelectric modules is changed to the waste heat A (sewage) water pump is installed in the pool. First, the waste hot water in the waste water pool is pumped into the heat exchange chamber for conduction heat exchange to recover the heat in the high temperature section of the waste water. The thermal energy is extracted from the waste hot water to further heat the bathing water, thereby greatly reducing the usage of semiconductor thermoelectric modules and reducing the cost. At the same time, with the increase of the heating temperature difference, the proportion of direct heat exchange increases, and the total heating efficiency will decrease. Further improve. Therefore, the utility model includes a housing, a semiconductor thermoelectric module heating unit group located in the housing, a waste water pool and a recovery device located therein, a nozzle and a cold water input pipe, a hot water output pipe, and a waste water discharge pipe. The key to the water pipe system in the housing is that there is also a set of heat exchange chambers with cold water and waste hot water chambers that adopt conduction heat exchange between the semiconductor thermoelectric module heating unit group and the cold water (bath water) inlet pipe in the shell. , the recovery device located in the waste water pool is a water pump or a sewage pump, and the semiconductor thermoelectric module heating unit includes a condensation chamber, a heating chamber and a semiconductor thermoelectric module (chip) located between the two and fixed with the two; The cold water (bath water) inlet pipe is connected to the water inlet of the cold water chamber in the heat exchange chamber, and its water outlet is connected to the water inlet of the next-level cold water chamber through a connecting pipe, and is connected in series until the outlet of the last-stage cold water chamber, The connecting pipe is connected to the water inlet of the heating chamber in the first-stage heating unit, and the water outlet is connected to the water inlet of the next-stage heating chamber, and connected in series until the water outlet of the last-stage heating chamber, and then directly passed through the hot water The output pipe is connected to the nozzle; the water inlet of the waste water chamber in the first-stage heat exchange chamber is connected to the water pump or sewage pump in the waste heat pool through the waste water input pipe to input the waste heat water, and the water outlet is passed through The connecting pipe is connected with the water inlet of the waste water chamber of the next stage, and connected in series until the water outlet of the waste water chamber of the last stage, and then connected with the water inlet of the condensation chamber of the last stage heating unit through the connecting pipe, and the water outlet is connected with the The water inlet of the condensing chamber of the previous stage heating unit is connected, connected in series until the water outlet of the condensing chamber of the first stage heating unit, and then discharged through the waste water outlet pipe.

The above-mentioned heat exchange chamber with cold water and waste hot water chambers adopts conduction heat exchange. The heat exchange fins are H-shaped flat heat exchange fins, and the fins on both sides of the heat exchange fins are respectively arranged in the cold water and waste water chamber in vivo. And the heating unit containing the condensing chamber, the heating chamber and the semiconductor thermoelectric module (chip) which is located between the two and fixed with the two, wherein the heat-absorbing surface of the semiconductor thermoelectric module is connected to the condensing chamber, the heat-releasing surface and the heating unit. The heat exchange fins in the cavity are tightly bonded into one body through heat-conducting silica gel.

In the utility model, before adopting the thermoelectric module for heating, firstly, the waste hot water in the waste hot water pool is pumped into the heat exchange chamber for conduction heat exchange, and the waste hot water in the high temperature section is combined with the input cold water (water for bathing) ) successively carry out heat exchange to increase its temperature (that is, preheat the input water), and then under the action of the heat pump of the semiconductor thermoelectric module after power-on, heat energy is successively extracted from the waste hot water after heat exchange to further heat the bathing water, thereby The use of semiconductor thermoelectric modules is greatly reduced, the cost is reduced, and the total thermal efficiency is improved. The thermal coefficient of the utility model can reach 2.5, and the energy saving is about 60%. Compared with the electric water heater of the background technology with the same specification, the thermoelectric module can be saved by 35-50%. Therefore, it has the characteristics of simple structure, high waste heat recovery and heating efficiency, remarkable energy saving effect, low production cost and operation cost, and safe and reliable use.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present utility model and the connection relationship of each part;

Fig. 2 is A-A view;

Figure 3 is a B-B view.

In the figure: 1. Cold (for bathing) water inlet pipe, 1～1, 2～1: connecting pipe, 1～2. (for bathing) hot water output pipe, 2. Waste hot water input pipe, 2～2. Waste hot water outlet pipe, 3. Heat exchange chamber, 3~1. H-type heat exchanger, 3~2. Cold water chamber, 3~3. Waste water chamber, 4~1. Condensation chamber, 4~2. Semiconductor Thermoelectric module (chip), 4~2.1. Heat absorbing (condensing) sheet, 4~2.2. Heating sheet, 4~3. Heating chamber, 5. Shell, 6. Waste heat pool, 6~1. Stencil, 7. Water pump, 8. Nozzle.

Detailed ways:

Take an electric water heater with a flow rate of 6L/Min and a maximum temperature rise of 50°C as an example: 2 heat exchange chambers 3 and 4 condensation chambers 4~1, heating chambers 4~3 and semiconductor thermoelectric modules (chips) 4~2 The heating unit inside; all kinds of water pipes and connecting pipes 1, 1~1, 1~2, 2, 2~1, 2~2 are all 1/2 stainless steel pipes, and the heat exchange chamber 3 (length×width×thickness ) 650×45×50mm, H-type heat exchange fins 3~1, each heat exchange cavity is equipped with 12 pieces, the material is aluminum plate, 14 fins are symmetrically arranged on both sides of the heat exchange fins, each fin (height × width ×Thickness) 50×20×1.5mm, the interval between fins is 2mm; each heating unit has 12 models TEC1-19913, (height×width×thickness) 50×50×4.0mm, the power is 250W, the current 9A semiconductor thermoelectric modules (chips), condensing chambers 4~1, heating chambers 4~3 (length×width×thickness) 650×45×54mm, the two chambers are set correspondingly to the semiconductor thermoelectric modules (chips) 4~2 15 (height x width x thickness) 50 x 18 x 1.5mm finned aluminum heat exchange fins 4-2.1 and 4-2.2, respectively connected to the heat-absorbing surface and heating surface of the semiconductor thermoelectric module 4-2 through heat-conducting silica gel Tightly bonded into one.

In this embodiment, the thermoelectric modules are connected in parallel, and then connected in series with the DC power supply; when the thermoelectric modules work at 70% of the maximum current and the maximum temperature rises to 50°C, 2/5 of the thermoelectric modules are saved compared with the background technology of the same specification; The efficiency of the thermoelectric module is the highest when it works at 30% of the maximum current. Therefore, when the system works at low temperature rise and low flow conditions, the direct heat exchange section can better meet the requirements of sufficient heat exchange. At the same time, the heating section of the thermoelectric module The input power will be reduced, and the thermal efficiency of the electric water heater will be higher at this time.

Claims (3)

1. semiconductor heat electric heater with the Waste Heat Recovery function, comprise housing, be located at the semiconductor thermoelectric module heating unit group in the housing, used heat pond and be located at retracting device in it, shower nozzle and contain cold water inlet pipe, the hot water delivery pipe, spent hot water's delivery pipe is at interior water pipe system, it is characterized in that also being provided with between semiconductor thermoelectric module heating unit group in housing and the cold water inlet one group and adopt the band cold water of conduction heat exchange and the heat exchange chamber group of spent hot water's cavity, the retracting device of being located in the used heat pond is water pump or sewage pump, and the semiconductor thermoelectric module heating unit then contains condensation chamber, heating chamber and be positioned between the two and with both fixing all-in-one-piece semiconductor thermoelectric modules; The water inlet of the cold water cavity in cold water inlet and the heat exchange chamber is connected, its delivery port by communicating pipe the water inlet with the next stage cold water cavity be connected, contact successively until the outlet of afterbody cold water cavity, then by be connected communicating pipe with heating chamber water inlet in the first order heating unit, its delivery port is connected with the water inlet of next stage heating chamber, contact successively behind the delivery port of afterbody heating chamber, directly be connected with shower nozzle through the hot water delivery pipe; Used heat water cavity water inlet in the first order heat exchange chamber then is connected to import the spent hot water with water pump or sewage pump in being located at the used heat pond by spent hot water's input pipe, its delivery port was connected with next stage used heat water cavity water inlet by communicating pipe, contact successively behind the delivery port of afterbody used heat water cavity, by communicating pipe the water inlet with afterbody heating unit condensation chamber be connected, its delivery port is connected with the water inlet of previous stage heating unit condensation chamber, contacts successively behind the delivery port of first order heating unit condensation chamber by the discharging of spent hot water's outlet pipe.

2. by the semiconductor heat electric heater of the described band Waste Heat Recovery of claim 1 function, it is characterized in that adopting the heat exchanger fin of conduction heat exchange is that H type flat board changes the formula heat exchanger fin, heat exchanger fin both sides fin is located at respectively in cold water and the spent hot water's cavity.

3. press the semiconductor heat electric heater of the described band Waste Heat Recovery of claim 1 function, it is characterized in that described contain condensation chamber, heating chamber and be positioned between the two and with both fixing heating units of all-in-one-piece semiconductor thermoelectric module, wherein the heat exchanging fin in the heat-absorbent surface of semiconductor thermoelectric module and condensation chamber, heat delivery surface and the heating chamber is integral by the heat conductive silica gel tight bond respectively.

Images