CN111156699A

CN111156699A - Air source heat pump water heater with phase change material for heat storage

Info

Publication number: CN111156699A
Application number: CN202010095008.6A
Authority: CN
Inventors: 冯建华; 王勇
Original assignee: Zhejiang Bailisheng New Energy Technology Co ltd
Current assignee: Zhejiang Bailisheng New Energy Technology Co ltd
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2020-05-15

Abstract

The invention discloses an air source heat pump water heater with phase change material heat storage, which comprises a box body shell, a heat insulation layer, an inner box body, a heat storage bin, a heat conducting medium, a phase change layer, a water inlet pipe, a water outlet pipe, a plate type heat exchanger, a controller, a temperature sensor, a water inlet, a water outlet, a refrigerant inlet, a refrigerant outlet, a host and a refrigerant pipeline, wherein the temperature sensor is arranged at the center of one side of the outer part of the inner box body, the heat conducting medium is respectively arranged at two sides of the inner center of the inner box body, the refrigerant pipeline is arranged at the center of the inner part of the inner box body, the water inlet pipe and the water outlet pipe are respectively arranged at two sides of the inner part of the inner box body and are positioned at the inner sides of the heat conducting medium corresponding to each other, the heat storage bin is respectively arranged at, the energy is saved, the use cost of people can be saved, and the environment is protected.

Description

Air source heat pump water heater with phase change material for heat storage

Technical Field

The invention relates to the technical field of water heaters, in particular to an air source heat pump water heater with phase change material heat storage.

Background

The current air source heat pump water heater has a big problem of water heater installation, and a household air source heat pump water heater usually needs a big cylindrical water tank to heat and store hot water. The common water tank needs 150L-400L, and only the air source heat pump water heater can be installed on a balcony or a bay window, so that the large-size water tank is not easy to coordinate with the whole household. In reality, the device is vertically installed, and needs to occupy expensive space; the wall-mounted water tank with hundreds of kilograms has potential safety hazards on the wall, so that the air source heat pump water heater with the phase-change material for storing heat is necessary to design.

Disclosure of Invention

The invention aims to provide an air source heat pump water heater with phase change material heat storage, which solves the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: an air source heat pump water heater storing heat by phase change materials comprises a box body shell, a heat preservation layer, an inner box body, heat storage bins, heat conducting media, a phase change layer, water inlet and outlet pipes, a plate type heat exchanger, a controller, a temperature sensor, a water inlet, a water outlet, a refrigerant inlet, a refrigerant outlet, a host and refrigerant pipelines, wherein the temperature sensor is arranged at the center of one side of the outer part of the inner box body, the heat conducting media are respectively arranged at two sides of the inner center of the inner box body, the refrigerant pipelines are arranged at the center of the inner part of the inner box body, the water inlet and outlet pipes are respectively arranged at two sides of the inner center of the inner box body and are positioned at the inner sides of the heat conducting media corresponding to each other, the heat storage bins are respectively arranged at two sides of the inner part of the inner box body, the phase change layer is filled in the heat storage bins, the other ends of the refrigerant inlet and the refrigerant outlet are respectively and fixedly connected with one end of a refrigerant pipeline, and the bottom ends of the water inlet and outlet pipes are respectively and fixedly connected with one ends of the water inlet and the water outlet.

Furthermore, the inside of the box shell is provided with an internal box body, and a cavity formed by the box shell and the heat preservation layer is filled with a heat preservation layer.

Furthermore, the other ends of the water inlet and the water outlet are respectively positioned outside the box body shell, and the controller is installed at the bottom end inside the box body shell.

Further, the host computer includes compressor, heat exchanger, expansion valve, liquid storage pot, flow controller, filter, air filter and fan.

Compared with the prior art, the invention has the following beneficial effects: the invention converts low-temperature heat energy in the air into high-temperature heat energy through the compressor, takes the same hot water manufacturing amount as a reference, saves electric energy to the maximum extent compared with an electric heater water heater, and has the use cost of only one fourth of that of the electric heater; compared with a gas water heater, the gas water heater does not consume any gas fuel, the use cost is only one third of that of the gas water heater, the air is taken as a main body, the energy is saved, the use cost of people can be saved, and the environment is protected.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an overall top cross-sectional view of the present invention;

FIG. 3 is an overall side cross-sectional view of the present invention;

FIG. 4 is an overall elevational cross-sectional view of the present invention;

in the figure: 1. a case body shell; 2. a heat-insulating layer; 3. an inner box; 4. a heat storage bin; 5. a heat-conducting medium; 6. a phase change layer; 7. a water inlet pipe and a water outlet pipe; 8. a plate heat exchanger; 9. a controller; 10. a temperature sensor; 11. a water inlet; 12. a water outlet; 13. a refrigerant inlet; 14. a refrigerant outlet; 15. a host; 16. a refrigerant pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: an air source heat pump water heater with phase change material heat storage comprises a box body shell 1, a heat insulation layer 2, an inner box body 3, a heat storage bin 4, a heat conducting medium 5, a phase change layer 6, a water inlet and outlet pipe 7, a plate heat exchanger 8, a controller 9, a temperature sensor 10, a water inlet 11, a water outlet 12, a refrigerant inlet 13, a refrigerant outlet 14, a host computer 15 and a refrigerant pipeline 16, wherein the inner box body 3 is installed inside the box body shell 1, the heat insulation layer 2 is filled in a cavity formed by the box body shell 1 and the heat insulation layer 2, the heat insulation layer 2 is made of polyurethane foam, polyethylene foam or rock wool and the like, the temperature sensor 10 is installed in the center of one side of the outer portion of the inner box body 3, the temperature of the phase change layer 6 is sensed through the temperature sensor 10, the host computer 15 stops running in a reasonable temperature range after the phase change layer 6 is fully completed through, the water heater is characterized in that heat-conducting media 5 are respectively arranged on two sides of the inner center of the inner box body 3, a refrigerant pipeline 16 is arranged at the inner center of the inner box body 3, water inlet and outlet pipes 7 are respectively arranged on two sides of the inner center of the inner box body 3, the water inlet and outlet pipes 7 are positioned on the inner sides of the heat-conducting media 5 corresponding to each other, heat storage bins 4 are respectively arranged on two sides of the inner part of the inner box body 3, phase change layers 6 are filled in the heat storage bins 4, the heat storage bins 4 are made of metal materials with high pressure resistance and corrosion resistance and high heat conduction efficiency, the phase change layers 6 are made of high-energy-storage-density and high-heat-conductivity composite nanometer phase change materials through high-pressure molding, the phase change materials are preferably made of high phase change latent heat, inorganic phase change materials with heat conduction performance superior to organic phase change materials and support structure, as the inorganic phase-change material can generate supercooling and phase separation in the phase-change heat storage-release process, the composite phase-change material is prepared by adding the thickening agent and the nucleating agent, and the selected inorganic phase-change material is mainly one or the combination of more than one of the following materials: sodium sulfate decahydrate, barium hydroxide octahydrate, chromium nitrate tetrahydrate, ammonium alum, aluminum potassium sulfate dodecahydrate, sodium carbonate decahydrate, sodium tetraborate, potassium phosphate heptahydrate, sodium acetate trihydrate, sodium hydrogen phosphate decahydrate, aluminum sulfate octadecahydrate, disodium hydrogen phosphate decahydrate, calcium chloride hexahydrate, magnesium nitrate hexahydrate and the like, sodium pyrophosphate or barium carbonate is used as a nucleating agent, sodium carboxymethylcellulose is used as a thickening agent to prepare a composite phase change material under certain working condition conditions, the phase change temperature is within the range of 20-118 ℃, the composite phase change material can also be prepared by an organic phase change material and a high-thermal-conductivity support structure material under specific temperature and pressure conditions, the organic phase change material is one or a combination of a plurality of materials, such as polyethylene glycol of alcohols, erythritol, palmitic acid, capric acid, lauric acid and alkane paraffin wax of fatty acids, and an Expanded Graphite (EG) or activated carbon particle (ACG) support material with good adsorbability and thermal conductivity, the phase change material with different molecular weights, high density and high heat conduction is prepared by adopting a physical absorption and addition melting blending method, the phase change temperature is within the range of 20-118 ℃, the phase change layer 6 adopts a high-pressure forming process, the storage capacity of the phase change material in unit volume is greatly improved, the energy storage is increased, the top end inside the box body shell 1 is provided with a host computer 15, the bottom end of the host computer 15 is fixedly connected with one end of a refrigerant inlet 13 and one end of a refrigerant outlet 14 respectively, the host computer 15 comprises a compressor, a heat exchanger, an expansion valve, a liquid storage tank, a restrictor, a filter, an air filter screen and a fan, cold air exhausted after the host computer 15 absorbs heat energy in air is directly exhausted by the fan or exhausted to other rooms in the room through an exhaust pipeline for cooling in summer, the other ends of the refrigerant inlet 13 and the refrigerant outlet 14 are fixedly connected with one end of a refrigerant pipeline 16, the bottom end of the water inlet and outlet pipe 7 is fixedly connected with one end of a water inlet 11 and one end of a water outlet 12 respectively, the other end of the water inlet 11 and the other end of the water outlet 12 are positioned outside the box body shell 1 respectively, and the bottom end inside the box body shell 1 is provided with a controller 9; when the invention is used, the negative poles of the plate heat exchanger 8, the controller 9, the temperature sensor 10 and the host 15 are respectively and electrically connected with the negative pole of the power supply by manpower, the positive poles of the plate heat exchanger 8, the controller 9, the temperature sensor 10 and the host 15 are electrically connected with the positive pole of the power supply, when heat storage is carried out, the power is switched on, under the action of a fan, air enters the host 15 from the air inlet side through a filter for filtering, low-temperature heat in the air is absorbed to heat a low-boiling working medium (refrigerant) and evaporate the low-boiling working medium, refrigerant steam is compressed into high-temperature high-pressure gas through a compressor, enters the heat storage and release inner box body 3 from a refrigerant inlet 13 through a refrigerant pipeline 16, is liquefied by the plate heat exchanger 8 to release heat to the heat conducting medium 5, simultaneously, the heat storage bin 4 is heated to further store heat for the phase change layer 6, the refrigerant enters the liquid storage tank through a refrigerant, when hot water is used, cold water enters the inner box body 3 for storing and releasing heat of the box body through the water inlet 11, the heat energy of the high-temperature heat-conducting medium 5 is absorbed through the plate heat exchanger 8, the heat energy is continuously absorbed from the phase change layer 6 by the heat-conducting medium 5 along with the continuous absorption and the discharge of the heat energy, the cold water is heated to high-temperature hot water, and the high-temperature hot water flows out through the water outlet 12; the phase change layer 6 continuously releases heat, when the temperature is reduced below the phase change temperature or reaches the temperature compensation temperature range set by the system, the host 15 is started to work to perform heat compensation, and meanwhile, the normal hot water supply is met.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an air source heat pump water heater of phase change material heat accumulation, includes box shell (1), heat preservation (2), inside box (3), heat storage storehouse (4), heat-conducting medium (5), phase transition layer (6), business turn over water pipe (7), plate heat exchanger (8), controller (9), temperature sensor (10), water inlet (11), delivery port (12), refrigerant import (13), refrigerant export (14), host computer (15) and refrigerant pipeline (16), its characterized in that: a temperature sensor (10) is installed at the center of one side of the outside of the inner box body (3), heat-conducting media (5) are installed on two sides of the center of the inside of the inner box body (3) respectively, a refrigerant pipeline (16) is installed at the center of the inside of the inner box body (3), water inlet and outlet pipes (7) are installed on two sides of the center of the inside of the inner box body (3) respectively, the water inlet and outlet pipes (7) are located on the inner sides of the heat-conducting media (5) corresponding to each other, heat storage bins (4) are installed on two sides of the inside of the inner box body (3) respectively, phase change layers (6) are filled in the heat storage bins (4), a host (15) is installed at the top end of the inside of the box body shell (1), the bottom end of the host (15) is fixedly connected with one ends of a refrigerant inlet (13) and a refrigerant outlet (14) respectively, and the other ends of the refrigerant inlet, the bottom ends of the water inlet and outlet pipes (7) are respectively fixedly connected with one ends of the water inlet (11) and the water outlet (12).

2. The phase change material heat storage air source heat pump water heater of claim 1, wherein: the internal mounting of box shell (1) has inside box (3), and has filled in the cavity that box shell (1) and heat preservation (2) formed heat preservation (2).

3. The phase change material heat storage air source heat pump water heater of claim 1, wherein: the other ends of the water inlet (11) and the water outlet (12) are respectively positioned outside the box body shell (1), and the controller (9) is installed at the bottom end inside the box body shell (1).

4. The phase change material heat storage air source heat pump water heater of claim 1, wherein: the host (15) comprises a compressor, a heat exchanger, an expansion valve, a liquid storage tank, a restrictor, a filter, an air filter screen and a fan.