CN103017281B - Energy storage type thermoelectric type air conditioner - Google Patents

Abstract

The invention relates to an energy storage type thermoelectric air conditioner, comprising: a phase change energy storage layer, a thermoelectric module layer, a ventilation heat exchange layer, a DC power supply and a control element. The phase change energy storage container is filled with heat transfer liquid medium and interspersed with phase change cold storage bodies and phase change heat storage bodies. A certain number of thermoelectric modules are arranged on the front and rear walls of the container, and the modules are separated by insulating materials. There are two front and rear air ducts, the thermoelectric modules in the front air duct are used for heat release/cooling, and the thermoelectric modules in the rear air duct are used for heat storage/cooling. Control element, DC power connection and control of thermoelectric modules. The invention integrates phase change energy storage technology and thermoelectric heating and refrigeration technology, can quickly and actively store energy while realizing active control of the energy discharge process, has high cooling and heating efficiency, and uses low-valley electricity prices to store energy at the same time, moving Peak filling and valley filling can meet the needs of cold storage and cooling in summer and heat storage and heating in winter, creating a comfortable indoor environment for users and effectively reducing operating costs.

Description

Energy storage thermoelectric air conditioner

technical field

The invention relates to a cold storage/heat storage type air conditioner combining phase change energy storage technology and thermoelectric technology, belonging to the technical field of air conditioning and refrigeration.

Background technique

With the improvement of people's living standards, more and more electrical appliances have entered the homes of ordinary people, and most of these appliances are used during the peak power consumption during the day, and the frequency of use drops sharply after the early morning, which makes the original very serious "peak" of power supply -Valley" contradiction is more prominent, and the difference between the peak and valley loads of electricity consumption is getting bigger and bigger. Current cooling and heating split air conditioners cannot effectively use off-peak electricity for cooling and heating, so they cannot make full use of the peak-valley electricity price difference, and the operating costs are relatively high. Energy storage technology is an important method to solve the contradiction between energy supply and energy consumption. It has the function of shifting peaks and filling valleys, which can greatly improve energy utilization. Phase change energy storage technology stores heat through the phase change of the medium. Compared with sensible heat, it has many advantages such as high energy storage density, and the process of heat storage and release is approximately isothermal, and it is easy to match with the operating system. Thermoelectric heating and cooling technology has advantages that traditional mechanical refrigeration cannot match: no rotating parts, fast cooling speed, high heating efficiency, high reliability, long life, small size, easy installation, basically no maintenance during use, and flexible control methods , Change the direction of the current to switch between heating and cooling modes, and adjust the current to precisely control the heating/cooling capacity, etc. Comprehensively utilize phase change energy storage technology and thermoelectric heating and cooling technology, make full use of their respective advantages, and study a heating and cooling air conditioner that can not only use low-peak energy storage, but also realize active energy discharge, and the temperature of energy discharge and heat dissipation rate can be adjusted and controlled It is of great significance to effectively reduce operating costs.

After searching the literature of the existing technology, it is found that the Chinese patent application number is 02201145.5, and the name of the utility model is: household phase change heat storage electric heating device. The heating device with heat storage function fills the insulation layer between the shell and the phase change heat storage shell; in the phase change heat storage shell, the heat conduction metal fins are vertically worn on the heating sleeve in parallel, and the two ends of the heating sleeve Through and welded on the metal plates on the left and right sides of the phase change heat storage shell, the formed cavity is filled with phase change heat storage material. But this device only has heat storage function, does not have cold storage effect. Chinese patent application number 200810031442.7, the title of the invention patent is: a thermoelectric heat pump phase change heat storage heating method and device, this technology recovers waste heat in the air through the thermoelectric chip heat pump, and improves heating efficiency; and uses the phase change heat storage device to store heat at night , making full use of the peak-valley electricity price difference to achieve the purpose of saving user costs; at the same time, it overcomes the easy frosting of ordinary household air conditioners due to the drop in ambient temperature, and solves the contradiction between heat supply and heat demand. Although phase change technology and thermoelectric technology are used at the same time, it does not have the function of cold storage and energy supply, and the design of heat dissipation and heat supply channels is not reasonable enough-the heat dissipation and heat supply channels are shared, there is interference, and automatic temperature control cannot be realized. The search also found that the Chinese patent application number is 200720066613.0, and the name of the utility model is: a composite phase change cold storage heat accumulator. This technology involves an energy storage device integrating heat storage and cold storage functions. The heat storage body is placed crosswise in the energy storage material container, and the cold or heat carrier in the energy storage project enters the composite phase change cold storage heat accumulator through the liquid inlet pipe, and exchanges energy with the cold storage body or heat storage body inside. Although the device integrates cold storage and heat storage, it is a passive cooling and heating supply. During this process, the temperature is not easy to adjust and control, the heat dissipation efficiency is unstable, and the heat dissipation efficiency is not high. It can be seen that although the above-mentioned invention patent has the function of heat storage and cold storage, it is not perfect and complete, and the heat dissipation efficiency is unstable during the heating and cooling stages, and the temperature is not easy to control. The present invention proposes a phase change energy storage type air conditioner that integrates heat storage for heating, cold storage for cooling, storage while supplying, and temperature control and heat preservation. Efficiency is easy to adjust and control, making full use of energy storage at low electricity prices to effectively reduce usage costs.

Contents of the invention

The technical problem to be solved in the present invention is to propose an air conditioner that integrates phase change energy storage technology and thermoelectric heating and refrigeration technology in order to address the shortcomings of the existing technology. Shifting peaks and filling valleys; thermoelectric technology can realize rapid and active energy storage and at the same time actively control the energy discharge process, and has the characteristics of high cooling and heating efficiency. It can simultaneously meet the demand for cold storage in summer and heat storage in winter, creating a comfortable indoor environment for users and effectively reducing usage costs.

The invention is realized through the following technical solutions, and the invention includes: a phase change energy storage layer, a thermoelectric module layer, a ventilation heat exchange layer, a DC power supply and a control element. The phase change energy storage layer is arranged in the shell, the phase change energy storage container is filled with heat transfer liquid medium and interspersed with phase change cold storage bodies and phase change heat storage bodies, and a certain number of thermoelectric modules and modules are evenly arranged on the front and rear walls of the container The space is separated by insulation material, and there are two front and rear air ducts between the phase change energy storage layer and the shell. The thermoelectric module in the front air duct is used for heat release/cooling, and the thermoelectric module in the rear air duct is used for heat storage/cooling. The DC power supply and control elements are arranged in the lower part of the shell, connected and controlled by the thermoelectric module, and realize the conversion of cold storage, heat storage and cooling, heat release function and temperature control through the control switch.

The phase change energy storage container concentrates heat storage/cold phase change materials, avoids seasonal replacement of phase change materials, and facilitates the installation of thermoelectric modules, and has a built-in temperature sensor for sensing the temperature of the heat transfer liquid medium, and transmits the results to control element. In addition, electric heating tubes are installed in the phase-change energy storage container, which converts electric energy into thermal energy for storage and utilization by using peak and valley electricity, relieving the pressure on the power grid and saving costs.

The phase change heat storage body and the phase change heat storage body are arranged crosswise, the phase change heat storage body is an organic or inorganic phase change material with a phase change temperature point between 40-80 degrees, and the phase change heat storage body made of small The ball, the phase change cold storage body is a phase change cold storage ball made of an organic or inorganic phase change material with a phase change temperature point between 10-18 degrees. Specific and appropriate phase change temperature point materials can be selected according to the required air supply temperature requirements.

The thermoelectric module layer includes a heat pipe radiator, a thermoelectric chip, a wire, and an insulating material. The wire is connected to a DC power supply, and the thermoelectric chip is in close contact with the heat pipe radiator and the wall of the container, and heat-conducting silicone paste is applied on the close-fitting surface to reduce the Thermal resistance; each thermoelectric module is separated by insulation material to reduce energy loss.

Temperature sensors are provided inside the front and rear air ducts to sense the temperature of the air entering the ducts and transmit the results to the control elements. The air inlet and outlet in the front channel are connected to the indoor, and the thermoelectric module is used for heat release/cooling; the air inlet and outlet in the rear channel are connected to the outdoor, and the thermoelectric module in the channel is used for heat storage/cooling.

The control element adjusts the power supply current of the thermoelectric chip in the thermoelectric module according to the difference between the temperature in the air duct and the temperature of the liquid in the container, so as to achieve the purpose of actively adjusting the temperature.

In the present invention, when heat is stored, the heat energy can be stored in the phase-change heat storage body by means of low-valley electricity through the electric heating tube and through the thermoelectric module in the rear air duct; when heat is supplied, it is stored in the phase-change heat storage body The heat energy can be directly transferred through the radiator, or absorbed and released by the thermoelectric module in the front air duct by the heat pump. The latter method is more efficient, more stable in heat dissipation, and easy to adjust and control the temperature; The thermoelectric module in the electric drive rear air duct cools and stores the cold energy in the phase-change cold storage body; when supplying cooling, the cold energy stored in the phase-change cold storage body can directly transfer cold energy through the radiator, or transfer it through the thermoelectric module in the front air duct. Absorb and release, the latter method is active and easy to achieve temperature control.

Compared with the prior art, the present invention has the following advantages:

1. Using thermoelectric technology, heat storage/cooling through thermoelectric modules, compared with directly using heating elements such as heating resistance wires, electric heating tubes, infrared quartz tubes, PTC heating elements, halogen tubes, electric heating films, etc., thermoelectric modules have higher heating efficiency and Fast heating and cooling function.

2. Compared with the passive heat dissipation method, the thermoelectric module can realize active energy release and facilitate the control of the outlet air temperature. When heating, the cold end of the thermoelectric module sticks to the wall of the container to absorb the heat stored in the phase change heat storage body. Through the secondary boost function of the heat pump, the hot end of the thermoelectric module releases more heat, which is highly active.

3. The thermoelectric module is convenient to adjust and control the outlet air temperature. There are temperature sensors in the air duct and the container, which are used to sense the temperature in the channel and the temperature of the heat transfer liquid medium in the container respectively, and send the result to the control element. According to the feedback temperature To adjust and control the working current of the thermoelectric chip in the thermoelectric module, and then change the temperature of the hot and cold ends of the thermoelectric chip to achieve the purpose of active temperature control.

4. Heat storage/cooling at night when the electricity is low, and release heat/cooling during the day, which is in line with the national power consumption policy, plays the role of shifting peaks and filling valleys, and reduces user costs at the same time.

5. At the same time, it has a built-in phase change cold storage body and a phase change heat storage body, which expands its application range and integrates the functions of heat storage and heat supply, cold storage and cooling supply, side storage and side supply, and temperature control and heat preservation.

6. In terms of structural design, two front and rear air ducts are set up, and thermoelectric modules are arranged inside the air ducts. The front air duct introduces wind from the room for heat exchange, and the thermoelectric modules are used for heating and cooling. The wind can be introduced from the outside for heat exchange, and the thermoelectric module can be used for heat storage and cold storage. The thermoelectric module and the air duct for the two purposes are set separately, which makes the operation and control more convenient.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

FIG. 2 is a schematic longitudinal sectional view of FIG. 1 .

FIG. 3 is a schematic cross-sectional view of FIG. 1 .

1. Moving pulley 2. Front air duct air inlet 3. Front air duct air supply fan

4. Front air duct 5. Shell 6. Insulation material

7. Thermoelectric module 8. Front air duct outlet 9. Electric heating tube

10. Container 11. Air outlet of rear air duct 12. Rear air duct

13. DC power supply and control components 14. Rear air duct supply fan 15. Rear air duct air inlet

16. Fixing screw 17. Thermoelectric chip 18. Heat pipe radiator

19. Phase change heat storage body 20. Phase change cold storage body 21. Heat transfer liquid medium

22. Temperature sensor

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1-3, the utility model includes: a moving pulley 1 and a casing 5, a phase-change energy storage container 10 is placed inside the casing 5, and the container 10 is filled with a phase-change thermal storage body 19 and a phase-change cold storage body 20 , the heat transfer liquid medium 21, and the container 10 is embedded with an electric heating tube 9, and a certain number of thermoelectric modules 7 are evenly arranged on the front and rear surfaces of the container 10 - including fixing screws 16, thermoelectric chips 17 and heat pipe radiators 18, each thermoelectric The modules 7 are separated by insulating material 6, and the front air passage 4 and the rear air passage 12 are reserved between the thermoelectric module 7 and the casing 5, and the front air passage 4 and the rear air passage 12 are respectively provided with front air passages at the lower part of the container 10. Road air supply fan 3 and rear air supply fan 14, front air duct 4 is reserved with front air duct outlet 8 and front air duct air inlet 2 respectively, rear air duct 12 is reserved with rear air duct outlet The tuyere 11 and the air inlet 15 of the rear air duct are installed with a DC power supply and a control element 13 on the lower right side inside the housing 5 for converting the AC power into DC power for the thermoelectric chip 17 to work. Inside the container 10, the front air duct 4, and the rear air duct 12, a temperature sensor 22 is arranged, and a control element is provided with the DC power supply 13. The temperature sensor 22 transmits the detected temperature data to the DC power supply and the control element 13, and controls The element further adjusts the magnitude of the operating current output from the DC power supply to the thermoelectric chip 17 to achieve the purpose of temperature control.

Its working principle is: the thermoelectric module 7 in the rear air channel 12 is used for heat storage/cold storage, and the accumulated energy is transferred to the heat transfer liquid medium 21 through the wall close to the container 10, and then stored in the phase change heat storage body 19 Or in the phase-change cold storage body 20, the heat or cooling capacity produced by the heat pipe radiator 18 in the rear air duct 12 is introduced by the rear air duct air supply fan 14 from the rear air duct air inlet 15 into the outdoor wind and passes through energy exchange with it. The air outlet 11 of the rear air duct is discharged to ensure that the temperature difference between the hot and cold ends of the thermoelectric chip 17 is not too high and works in a good performance state; The energy can be directly transmitted to the heat pipe radiator 18 in the front air duct 4, or can be absorbed by the thermoelectric chip 17 in the front air duct 4 and transferred to the heat pipe radiator 18, and then the air supply fan 3 in the front air duct will pass through the air inlet of the front air duct. 2. The indoor wind is introduced into the room through the air outlet 8 of the front air duct after energy exchange with the heat pipe radiator 18 in the front air duct 4.

The "energy-storage thermoelectric air conditioner" of the present invention has the functions of heat storage for heating, cold storage for cooling, storage while supplying, and temperature control and heat preservation. The following is a detailed process introduction for each working mode.

Heat storage and heat supply: When storing heat, after turning on the power, turn off the front air duct air supply fan 3, the front air duct air inlet 2, and the front air duct air outlet 8, and turn on the rear air duct air supply fan 14, and the rear air duct inlet The air outlet 15 and the air outlet 11 of the rear air passage, by turning on the DC power supply and the control element 13 to activate the thermoelectric chip 17 in the rear air passage 12, make the end close to the wall of the container 10 generate heat and transfer it to the phase change storage through the heat transfer liquid medium 21 Stored in the heat body 19, it is close to the heat pipe radiator 18 to produce cold, and the outdoor air is introduced from the rear air duct air inlet 15 with the rear air duct air supply fan 14 for energy exchange, and then discharged through the rear air duct air outlet 11; After turning on the power, turn on the front air duct air supply fan 3, the front air duct air inlet 2, and the front air duct air outlet 8, and turn off the rear air duct air supply fan 14, the rear air duct air inlet 15, and the rear air duct air outlet 11. The heat stored in the phase-change heat storage body 19 can be directly transferred to the heat pipe radiator 18 in the front air duct 4, or the thermoelectric chip 17 in the front air duct 4 can be operated by turning on the DC power supply and the control element 13—tight One end attached to the wall of the container 10 produces cold, and one end close to the heat pipe radiator 18 produces heat. After secondary lifting, the stored heat is absorbed and indirectly transferred to the heat pipe radiator 18, and then the front air duct blower 3 is supplied from the front air duct air inlet. 2 Introducing indoor wind and the heat pipe radiator 18 in the front air duct 4 after energy exchange, blowing hot air into the room from the air outlet 8 of the front air duct. The former heat supply mode is an energy-saving mode, which releases the heat stored in the phase-change heat storage body 19 through heat conduction and convection; the latter heat supply mode is the main control mode, using the heat pump function, which has high efficiency and can realize Features of temperature control.

Cold storage and cooling supply: when storing cold, after turning on the power supply, turn off the front air duct air supply fan 3, the front air duct air inlet 2, and the front air duct air outlet 8, and turn on the rear air duct air supply fan 14, and the rear air duct air inlet 15 , the air outlet 11 of the rear air passage, turn on the DC power supply and the control element 13 to start the thermoelectric chip 17 in the rear air passage 12 to make the end close to the wall of the container 10 generate cold and transfer it to the phase change cold storage body 20 through the heat transfer liquid medium 21 Store, close to the heat pipe radiator 18 to produce heat and exchange energy with the rear air duct fan 14 to introduce outdoor wind from the rear air duct air inlet 15, and then discharge it through the rear air duct air outlet 11; when cooling, turn on the power After that, open the front air channel air supply fan 3, the front air channel air inlet 2, the front air channel air outlet 8, close the rear air channel air supply fan 14, the rear air channel air inlet 15, and the rear air channel air outlet 11, store in The cooling capacity of the phase-change cold storage body 20 can be directly transferred to the heat pipe radiator 18 in the front air duct 4, or the thermoelectric chip 17 in the front air duct 4 can be operated by turning on the DC power supply and the control element 13—close to the wall of the container 10 One end of the heat pipe radiator 18 is close to the heat pipe radiator 18 and the other end produces cold, which absorbs the stored cold energy and indirectly transfers it to the heat pipe radiator 18, and then the front air duct air supply fan 3 introduces the indoor wind and the front air from the front air duct air inlet 2. The heat pipe radiator 18 in the road 4 blows cold wind into the room from the air outlet 8 of the front air passage after energy exchange. The former cooling mode is an energy-saving mode, which releases the heat stored in the phase-change heat storage body 19 through conduction and convection; the latter cooling mode is the main control mode, using the heat pump to change the DC power supply and control elements The input current of 13 can change the temperature of the hot and cold ends of the thermoelectric chip 17, thereby realizing the self-control of the outlet air temperature.

Storing while supplying: when heat is being stored while supplying heat, after the power is turned on, the front air duct air supply fan 3, the front air duct air inlet 2, the front air duct air outlet 8, the rear air duct air supply fan 14, The rear air duct air inlet 15 and the rear air duct air outlet 11 heat the heat transfer liquid medium 21 through the electric heating tube 9——increase the medium temperature and wall temperature in the container 10, reduce the temperature difference between the hot and cold ends of the thermoelectric chip 17, and improve For the purpose of thermal efficiency, the DC power supply and control element 13 are turned on at the same time for the thermoelectric chip 17 in the front air duct 4 to work—the end close to the wall of the container 10 produces cold, the end close to the heat pipe radiator 18 produces heat, and is stored after a second lift. The heat is absorbed and indirectly transmitted to the heat pipe radiator 18, and then the front air duct air supply fan 3 introduces the indoor air from the front air duct air inlet 2 to exchange energy with the heat pipe radiator 18 in the front air duct 4, and then sends hot air from the front air duct air outlet. 8 blown into the chamber. When supplying cold while storing cold, after the power is turned on, the front air duct air supply fan 3, the front air duct air inlet 2, the front air duct air outlet 8, the rear air duct air supply fan 14, and the rear air duct air inlet 15 are turned on at the same time , the air outlet 11 of the rear air duct, and repeat other work processes during cold storage and cooling.

Temperature control and heat preservation: When the temperature difference between the hot and cold ends of the thermoelectric chip 17 in the rear air duct 12 is too large, resulting in poor working performance and affecting heat storage/cold storage, the temperature sensor 22 installed in the container 10 and the rear air duct 12 can The detected temperature data is transmitted to the DC power supply and the control element 13, and the control element further adjusts the operating current output from the DC power supply to the thermoelectric chip 17, so that the temperature of the hot and cold ends changes to achieve the purpose of temperature control; When the temperature does not reach the required value of the indoor environment, the detected temperature data can be transmitted to the DC power supply and the control element 13 through the temperature sensor 22 arranged in the front air duct 4, and the control element can then adjust the output of the DC power supply to the thermoelectric chip 17. The size of the working current changes the temperature of the hot and cold ends, and then adjusts the temperature of the air outlet in the front air duct 4 to meet the indoor demand.

Claims (6)

1. an energy storage type thermoelectric type air conditioner, comprising: phase-changing energy-storing layer, electrothermal module layer, ventilation heat exchange layer, dc source and control element, described phase-changing energy-storing layer is arranged in the enclosure, phase-changing energy-storing layer comprises container, electric heating tube, heat transfer liquids medium and phase change cold-storage body, phase-transition heat-storage body, before and after container, wall has been evenly arranged some electrothermal modules, intermodule insulation material separates, air channel, front and back two is provided with between phase-changing energy-storing layer and shell, i.e. ventilation heat exchange layer, in primary air separating duct, electrothermal module is used for putting hot/cold, for exoergic passage, in rear air channel, electrothermal module is used for storing hot/cold, for accumulation of energy passage, dc source and control element are arranged in outer casing underpart, cold-storage is realized by gauge tap, accumulation of heat and letting cool, the conversion of heat release function and the control of temperature.

2. a kind of energy storage type thermoelectric type air conditioner according to claim 1, it is characterized in that, phase-transition heat-storage body in the described phase-changing energy-storing layer organic or inorganic class phase-change material that to be phase transformation temperature points be between 40-80 degree, the phase change cold-storage body organic or inorganic class phase-change material that to be phase transformation temperature points be between 10-18 degree, described phase change cold-storage body, phase-transition heat-storage body arranged crosswise.

3. a kind of energy storage type thermoelectric type air conditioner according to claim 1, is characterized in that, described electrothermal module layer comprises heat-pipe radiator, thermoelectric chip, wire, insulation material; Wire is connected with dc source, and thermoelectric chip is close to heat-pipe radiator and container wall, and all smears thermal conductive silicon cream being close to face, separates between each electrothermal module with insulation material.

4. a kind of energy storage type thermoelectric type air conditioner according to claim 1, is characterized in that, described ventilation heat exchange layer is made up of exoergic air channel, accumulation of energy air channel; The air inlet of blower fan, the air outlet being arranged on shell front side and outer casing bottom forms exoergic air channel, i.e. primary air separating duct, and blower fan introduces indoor wind by air inlet and heat-pipe radiator is blown into indoor through air outlet after heat exchange; Be positioned at the blower fan on rear side of shell, air inlet and air outlet and form accumulation of energy air channel, i.e. rear air channel, blower fan introduces outdoor wind by air inlet and heat-pipe radiator drains into outdoor through air outlet after heat exchange; Described blower fan is all arranged on the bottom in air channel; Exoergic air channel and accumulation of energy air channel can be opened separately, realize exoergic or accumulation of energy process respectively; Also can open simultaneously, realize the feature of accumulation of energy limit, limit exoergic.

5. a kind of energy storage type thermoelectric type air conditioner according to claim 1, is characterized in that, described dc source, is converted to low-voltage DC by standard household AC electrical, drives electrothermal module work; Described control element, regulates the supply current size of thermoelectric chip in electrothermal module according to the difference of temperature in air channel and liquid in container temperature.

6. a kind of energy storage type thermoelectric type air conditioner according to claim 1, it is characterized in that, electrothermal module (7) in rear air channel (12) is for accumulation of heat/cold-storage, the energy of accumulation is delivered in heat transfer liquids medium (21) by the wall be close to phase-changing energy-storing container (10), and then be stored in phase-transition heat-storage body (19) or phase change cold-storage body (20), the heat that heat-pipe radiator (18) in rear air channel (12) produces or cold, by rear air channel breeze fan (14) from rear air inlet of air duct (15) introduce outdoor wind with it after energy exchange through after duct outlet (11) discharge, ensure that thermoelectric chip (17) cold warm end temperature difference is not too high, be operated in superperformance state, when needs are to indoor heat release/when letting cool, the energy being stored in phase-transition heat-storage body (19) or phase change cold-storage body (20) can be directly delivered to primary air separating duct (4) interior heat-pipe radiator (18), also absorb by primary air separating duct (4) interior thermoelectric chip (17) and be delivered to heat-pipe radiator (18), then by primary air separating duct breeze fan (3) in the past air inlet of air duct (2) introduce indoor wind and primary air separating duct (4) interior heat-pipe radiator (18) is blown into indoor through primary air separating duct air outlet (8) after energy exchange.