CN111623452B - Air conditioner heat storage device, air conditioner and control method of air conditioner - Google Patents

Air conditioner heat storage device, air conditioner and control method of air conditioner Download PDF

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Publication number
CN111623452B
CN111623452B CN202010617830.4A CN202010617830A CN111623452B CN 111623452 B CN111623452 B CN 111623452B CN 202010617830 A CN202010617830 A CN 202010617830A CN 111623452 B CN111623452 B CN 111623452B
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China
Prior art keywords
heat storage
air conditioner
storage material
temperature
pipe
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CN202010617830.4A
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Chinese (zh)
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CN111623452A (en
Inventor
李珊
江悄悄
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Priority to CN202010617830.4A priority Critical patent/CN111623452B/en
Publication of CN111623452A publication Critical patent/CN111623452A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/34—Heater, e.g. gas burner, electric air heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/01—Heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/24—Storage receiver heat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioner heat storage device, an air conditioner and a control method thereof. Wherein, the inside of the shell is provided with a refrigerant pipeline; the heat storage material is filled in the shell and is positioned between the inner wall of the shell and the refrigerant pipeline; the disturbance assembly comprises a disturbance member inserted into the heat storage material, and a driver connected with the disturbance member, wherein the driver is suitable for driving the disturbance member to disturb the heat storage material. The air-conditioning heat storage device can improve the uniformity of heat storage quantity of all positions of the heat storage material in the air-conditioning heat storage device so as to improve the heat exchange rate of the air-conditioning heat storage device.

Description

Air conditioner heat storage device, air conditioner and control method of air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner heat storage device, an air conditioner and a control method thereof.
Background
When the air conditioner operates in a heating mode under a low-temperature working condition (such as winter), the outdoor heat exchanger in the outdoor unit is easy to generate frosting phenomenon, so that the heating capacity of the air conditioner is reduced, and the outdoor unit needs to be defrosted. The traditional air conditioner adopts a refrigerant reverse circulation mode to defrost, namely, the refrigerant flow direction of the four-way valve is switched in a heating mode so as to switch the current heating mode into a refrigerating mode, so that the high-temperature refrigerant discharged by the compressor firstly enters an outdoor heat exchanger to defrost, and then flows back to the compressor through the indoor heat exchanger. The defrosting mode can reduce the temperature of an indoor room, has large temperature fluctuation and greatly reduces comfort level.
Therefore, an air conditioner heat storage device which can be applied to an air conditioner is commercially available, and the air conditioner heat storage device is connected to a pipeline of a refrigerant circulation system of the air conditioner so as to defrost an outdoor heat exchanger by utilizing heat storage capacity of the air conditioner heat storage device, and the refrigerant flow direction of the air conditioner is not required to be switched. However, the heat storage material in the conventional air conditioner heat storage device is usually stationary, and in the heating or defrosting process, the situation that one local position of the heat storage material has a higher temperature and the other local position has a lower temperature easily occurs. That is, the heat storage amount of each position of the heat storage material is not uniform, which results in a low heat exchange rate of the air conditioner heat storage device and poor defrosting effect.
Disclosure of Invention
The invention mainly aims to provide an air conditioner heat storage device, which aims to improve the uniformity of heat storage quantity of all positions of a heat storage material in the air conditioner heat storage device so as to improve the heat exchange rate of the air conditioner heat storage device.
In order to achieve the above object, the present invention provides an air conditioner heat storage device, which includes a housing, a heat storage material, and a disturbance component. Wherein, the inside of the shell is provided with a refrigerant pipeline; the heat storage material is filled in the shell and is positioned between the inner wall of the shell and the refrigerant pipeline; the disturbance assembly comprises a disturbance member inserted into the heat storage material, and a driver connected with the disturbance member, wherein the driver is suitable for driving the disturbance member to disturb the heat storage material.
Optionally, the shell comprises a shell body for accommodating the heat storage material and a shell cover covered on the upper end of the shell body; wherein the driver is mounted on the shell cover; the upper end of the disturbance element is connected with the driver.
Optionally, the shell cover is provided with an insertion port for inserting the disturbance element into the shell body, and the periphery of the insertion port is convexly provided with an annular supporting part; the disturbance assembly further comprises a fixing plate for installing the driver, and the fixing plate covers the insertion opening and is fixedly connected with the annular supporting part.
Optionally, the annular supporting part comprises two annular supporting ribs arranged along the radial direction of the annular supporting part, and an annular groove is formed between the two annular supporting ribs at intervals; the lower surface of the fixing plate is convexly provided with annular ribs, and the annular ribs are inserted into the annular grooves.
Optionally, a wire opening communicated with the insertion opening is formed in the side wall of the annular supporting portion, and the wire opening is suitable for being used for a wire of an electric control component in the shell to pass through.
Optionally, the depth of the disturbance extending into the shell is greater than or equal to 1/2 of the depth of the inner cavity of the shell.
Optionally, the disturbance piece includes a hard body and a heat insulation material layer arranged on the outer surface of the hard body to wrap the hard body. Optionally, the disturbance member is vibratable relative to the housing to disturb the heat storage material by vibration; or the disturbance member is rotatable relative to the housing to disturb the heat storage material by rotation; or the disturbing member is swingable relative to the housing to disturb the heat storage material by swinging; or the disturbing member is liftable relative to the housing to disturb the heat storage material by lifting.
Optionally, the air conditioner heat storage device further comprises a control assembly, wherein the control assembly comprises a controller connected with the driver and a first temperature sensor connected with the controller; the first temperature sensor is disposed at the bottom of the heat storage material.
Optionally, the control assembly further comprises a second temperature sensor connected with the controller, wherein the second temperature sensor is arranged in the middle of the heat storage material; and/or the air-conditioning heat storage device further comprises a third temperature sensor connected with the controller, wherein the third temperature sensor is arranged on the top of the heat storage material.
Optionally, the air-conditioning heat storage device further includes an electric heating element disposed within the housing, the electric heating element being inserted into the heat storage material within the housing.
Optionally, the electric heating piece comprises an electric heating bottom plate and an electric heating main plate which is vertically arranged on the electric heating bottom plate; the air conditioner heat storage device is provided with the disturbance piece at one side or two sides of the electric heating main board.
Optionally, the air conditioner heat storage device further comprises a heat storage heat exchanger configured in the shell, the heat storage heat exchanger comprises a plurality of fins and a refrigerant pipe penetrating and connecting the fins, and the refrigerant pipe is used for forming the refrigerant pipeline.
Optionally, the number of the heat storage heat exchangers is at least two; the two heat storage heat exchangers are respectively arranged at two sides of the electric heating part, refrigerant pipes of the two heat storage heat exchangers are communicated through connecting pipes to form the refrigerant pipe, an inlet pipe of the refrigerant pipe is formed on one heat storage heat exchanger, and an outlet pipe of the refrigerant pipe is formed on the other heat storage heat exchanger.
Optionally, the air conditioner heat storage device further comprises two heat exchanger brackets configured in the shell, and the two heat exchanger brackets are oppositely arranged to be respectively and correspondingly provided for the installation of the two heat storage heat exchangers.
The invention also provides an air conditioner which comprises the air conditioner heat storage device. The air conditioner heat storage device comprises a shell, a heat storage material and a disturbance component. Wherein, the inside of the shell is provided with a refrigerant pipeline; the heat storage material is filled in the shell and is positioned between the inner wall of the shell and the refrigerant pipeline; the disturbance assembly comprises a disturbance member inserted into the heat storage material, and a driver connected with the disturbance member, wherein the driver is suitable for driving the disturbance member to disturb the heat storage material.
Optionally, the air conditioner further comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger and a first throttling device which are sequentially connected; the compressor is provided with an exhaust pipe and an air return pipe;
The air conditioner further comprises a first control valve, and the first control valve is arranged on an air return pipe of the compressor; an inlet pipe of a refrigerant pipeline of the air conditioner heat storage device is connected to an inlet side of the first control valve, and an outlet pipe of the refrigerant pipeline is connected to an outlet side of the first control valve;
The air conditioner further comprises a second control valve and a defrosting pipe, wherein two ends of the defrosting pipe are respectively connected to two ends of the first throttling device, and the second control valve is arranged on the defrosting pipe.
Optionally, the air conditioner further comprises a first pipe, a second pipe and a switcher; wherein the first piping connects the outdoor heat exchanger and the first throttling device in this order; the second piping is connected with the first throttling device and the indoor heat exchanger in sequence;
The switch is switchable between a first state and a second state, wherein:
In the first state, the switch communicates the exhaust pipe with the first pipe and communicates the muffler with the second pipe;
in the second state, the switcher communicates the muffler with the first pipe and communicates the exhaust pipe with the second pipe.
Optionally, the air conditioner further comprises a second throttling device, and the second throttling device is arranged on an inlet pipe of the refrigerant pipeline.
The invention also provides a control method of the air conditioner, which comprises an air conditioner heat storage device; the control method of the air conditioner comprises the following steps:
Controlling the air conditioner to operate according to a heating mode;
Acquiring the temperature Tw of the outdoor heat exchanger, and comparing the temperature Tw of the outdoor heat exchanger with a defrosting preset temperature Ts pre-stored by a controller;
Under the condition that Tw is less than Ts, acquiring the bottom temperature T 1 of a heat storage material of the air conditioner heat storage device, and comparing the bottom temperature T 1 of the heat storage material with the starting temperature Tr of an electric heating element pre-stored by a controller;
Turning on the electric heating element under the condition that T 1 is smaller than Tr;
and controlling the air conditioner to switch to a defrosting mode.
Optionally, after the electric heating element is turned on, before the air conditioner is controlled to switch to the defrosting mode, the control method of the air conditioner further includes the following steps:
Acquiring a middle temperature T 2 and a top temperature T 3 of the heat storage material;
Comparing the maximum difference value delta T max with a preset temperature difference delta T 0 prestored by a controller; wherein the maximum difference Δt max is the maximum value of |t 3-T1 | and |t 2-T1 |;
and under the condition of delta T max＞ΔT0, controlling the opening of the disturbance component to disturb the heat storage material.
Optionally, the temperature of the activation temperature Tr of the electric heating element is less than the freezing temperature of the heat storage material.
Optionally, the range of the defrosting preset temperature Ts is-2 ℃ and is less than or equal to 2 ℃.
According to the technical scheme, the disturbance component is arranged in the air conditioner heat storage device and comprises the disturbance element inserted into the heat storage material and the driver connected with the disturbance element, so that the disturbance element is driven by the driver to disturb the heat storage material, the heat storage material is disturbed to stir and mix the part with higher temperature with the part with lower temperature, the temperature of each part of the heat storage material is uniform, the uniformity of heat storage quantity of each part of the heat storage material is greatly improved, and the heat exchange rate of the air conditioner heat storage device is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a part of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a front view of the heat storage device of the air conditioner of the present invention;
FIG. 3 is a side view of the hollow conditioning and heat accumulating device of FIG. 2;
FIG. 4 is a cross-sectional view taken along line I-I in FIG. 3;
FIG. 5 is an enlarged view of FIG. 4 at A;
FIG. 6 is a schematic view of a portion of the air conditioning and heat accumulating apparatus of FIG. 3;
FIG. 7 is an exploded schematic view of the air conditioning and heat accumulating device of FIG. 3;
FIG. 8 is a schematic view of the structure of the cover in FIG. 7;
FIG. 9 is a schematic diagram of a refrigerant system cooling mode of the air conditioner according to the present invention;
fig. 10 is a schematic diagram of a heating mode of a refrigerant system of the air conditioner according to the present invention;
FIG. 11 is a schematic diagram of a refrigerant system defrosting mode of the air conditioner according to the present invention;
FIG. 12 is a graph showing the effect of the air conditioner of the present invention on the average temperature of the indoor environment in the defrosting mode;
FIG. 13 is a flowchart illustrating an embodiment of a control method of an air conditioner according to the present invention;
Fig. 14 is a detailed flowchart of a control method of the air conditioner of fig. 13.
Reference numerals illustrate:
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1, the present invention provides an air-conditioning heat storage device 200 and an air conditioner 100 including the air-conditioning heat storage device 200. The air-conditioning heat storage device 200 is applied to the air conditioner 100 to defrost the outdoor heat exchanger 120 by using the heat stored in the air-conditioning heat storage device 200, without switching the refrigerant flow direction of the air conditioner 100. The uniformity of the heat storage amount of each position of the heat storage material inside the air-conditioning heat storage device 200 is good, and the heat exchange rate of the air-conditioning heat storage device 200 can be effectively improved. As for the type of the air conditioner 100, the air conditioner 100 may be a split type air conditioner or an integrated type air conditioner. The split air conditioner comprises an air conditioner outdoor unit and an air conditioner indoor unit, wherein the air conditioner indoor unit can be a wall-mounted air conditioner or a floor-mounted air conditioner; the integrated air conditioner can be a window air conditioner or a lifting air conditioner and the like. The air conditioner 200 will be described first.
Referring to fig. 2 to 4, in an embodiment of an air-conditioning heat storage apparatus 200 of the present invention, the air-conditioning heat storage apparatus 200 includes a housing 210, a heat storage material, and a disturbance component 300. Wherein, the inside of the shell 210 is provided with a refrigerant pipeline for connecting with a pipeline of an air conditioner; the heat storage material is filled in the shell 210 and is positioned between the inner wall of the shell 210 and the refrigerant pipeline; the perturbation assembly 300 comprises a perturbation member 310 interposed in the thermal storage material, and an actuator 320 coupled to the perturbation member 310, the actuator 320 being adapted to actuate the perturbation member 310 to perturb the thermal storage material.
Specifically, the housing 210 has an interior cavity; the heat storage material is filled in the inner cavity; the refrigerant pipeline is positioned in the inner cavity and is surrounded by the heat storage material so as to be in full contact with the heat storage material, thereby being beneficial to improving the heat exchange rate. The refrigerant pipe may be a refrigerant pipe of a heat exchanger disposed in the inner cavity, or an additional refrigerant pipe separately disposed, or a flow channel formed by internal components of the housing 210. And in particular will be described in more detail hereinafter.
During heating of the heat storage material to store heat or after heat storage is finished, the driver 320 drives the disturbance member 310 to disturb the heat storage material, so that the heat storage material is disturbed to stir and mix the part with higher temperature with the part with lower temperature, and further the temperature of each part of the heat storage material is uniform, and the uniformity of heat storage quantity of each part of the heat storage material is greatly improved.
As for the shape and structure of the perturbation 310, there are various designs. For example, the disturbance 310 may be a disturbance bar arranged in a long strip, a disturbance plate arranged in a plate shape, or a disturbance slurry with paddles. The surface of the disturbance rod or the disturbance plate can be convexly provided with a firing pin protrusion or a poking piece, so that the disturbance to the heat storage material is enhanced, the disturbance efficiency is improved, and the uniformity of heat storage quantity at each position of the heat storage material is greatly improved.
According to the technical scheme of the invention, the disturbance assembly 300 is configured in the air conditioner heat storage device 200, and the disturbance assembly 300 comprises the disturbance element 310 inserted into the heat storage material and the driver 320 connected with the disturbance element 310, so that the disturbance element 310 is driven by the driver 320 to disturb the heat storage material, so that the heat storage material is disturbed to mix the part with higher temperature with the part with lower temperature, the temperature of each part of the heat storage material is uniform, the uniformity of heat storage quantity of each part of the heat storage material is greatly improved, and the heat exchange rate of the air conditioner heat storage device 200 is effectively improved.
In the defrosting process of the air-conditioning heat storage device 200, under the influence of factors such as flow delay of a refrigerant in a pipeline, action time of a valve, defrosting speed, defrosting water falling off and the like, the theoretical defrosting time expression is deltat=qc/Wc; wherein Δt is defrosting time, qc is total heat required for defrosting, and Wc is defrosting thermal power. Under the same working condition, the frosting amount of the outdoor heat exchanger 120 is constant, that is, the frosting time is tightly dependent on Wc. Wc is affected by two factors: (1) The heat exchange power Wc1 of the outdoor heat exchanger 120, wc1=kaΔt, wherein K is the heat exchange coefficient of the outdoor heat exchanger 120, a is the equivalent heat exchange area of the outdoor heat exchanger 120, Δt is the defrosting heat transfer temperature difference; (2) The heat power Wc2, wc2=wx+w1-We supplied from the air conditioner 100 to the outdoor heat exchanger 120, where Wx is the heat release power of the air conditioner heat storage device 200, W1 is the heat power of the compressor 110, and We is the indoor heat supply power.
It can be seen from this: (1) The defrosting time is affected by the heat exchange power of the outdoor heat exchanger 120 and the heat release power of the air-conditioning heat storage device 200; (2) In the case that parameters such as the outdoor heat exchanger 120 and the compressor 110 of the air conditioner 100 are not changed, increasing the total heat storage amount and the heat release power of the air conditioner heat storage device 200 can effectively shorten the defrosting time, thereby reducing the indoor environmental temperature fluctuation.
In the air-conditioning heat storage device 200 of the present invention, on the premise of not increasing the size of the air-conditioning heat storage device 200, the heat release power of the heat storage material can be effectively increased by improving the uniformity of the heat storage amount of the heat storage material in the air-conditioning heat storage device 200, so that the heat exchange rate of the heat storage material is greatly increased, and the original heat exchange rate can be increased from 18% to more than 45%, and the defrosting time of the air-conditioning heat storage device 200 is greatly reduced. To verify the influence of the air-conditioning heat storage device 200 of the present invention on the fluctuation of the indoor environmental temperature, the air conditioner 100 to which the air-conditioning heat storage device 200 of the present invention is applied was tested, the test environment being the indoor environmental temperature of 1 ℃, the outdoor environmental temperature of-7 ℃, and the air conditioner set the outlet air temperature of 30 °. The test results are given in table 1 below and in fig. 12:
table 1: variation data of indoor temperature average temperature
Since the conventional air conditioner 100 needs to switch the flow direction of the refrigerant when the defrosting mode is turned on, the indoor environment temperature fluctuates by about 6 ℃. In the present invention, however, since the heat exchange rate of the heat storage material is improved, as can be seen from the above table 1 and fig. 12, the air conditioner 100 to which the air conditioner heat storage device 200 of the present invention is applied has the effect that the indoor environment temperature fluctuation is about 1 ℃ and not more than 2 ℃ at maximum in the defrosting mode, the indoor environment temperature fluctuation occurring in the conventional air conditioner heat storage device is reduced to about 1 ℃ or even lower than the indoor environment temperature fluctuation occurring in the defrosting mode, and the indoor environment temperature fluctuation is small and the user experience is good.
Referring to fig. 2 to 4, the air-conditioning heat storage apparatus 200 further includes an electric heating element 220 disposed in the housing 210, and the electric heating element 220 is inserted into the heat storage material in the housing 210, based on any of the above embodiments. The heat storage material is electrically heated by the electric heating member 220 so that the heat storage material can rapidly store heat. The electric heating element 220 may be an electric heating rod or an electric heating plate.
The electric heating element 220 may be disposed at one side of the perturbation element 310, or may be disposed around the perturbation element 310. Here, optionally, the electric heating element 220 includes an electric heating bottom plate 221 and an electric heating main plate 222 vertically disposed on the electric heating bottom plate 221; the air-conditioning and heat-storage device 200 is provided with a disturbance 310 on one or both sides of the electrothermal mother plate 222. That is, the perturbation element 310 may be one, and the perturbation element 310 may be disposed on either side of the electrothermal mother panel 222; or the number of the disturbance elements 310 is two, and the two disturbance elements 310 are respectively configured at two sides of the electric heating main board 222 so as to disturb the heat storage materials at two sides of the electric heating main board 222, thereby improving disturbance efficiency.
Referring to fig. 4, 6 and 7, in an embodiment, the air conditioner heat storage device 200 further includes a heat storage heat exchanger 230 disposed in the housing 210, the heat storage heat exchanger 230 includes a plurality of fins and a refrigerant pipe penetrating and connecting the fins, and the refrigerant pipe is used to form a refrigerant pipeline 231. The number of the heat storage heat exchangers 230 may be one or two or more.
Specifically, the number of the heat storage heat exchangers 230 is at least two. The two heat storage heat exchangers 230 are separately disposed at two sides of the electric heating member 220, refrigerant pipes of the two heat storage heat exchangers 230 are communicated through a connecting pipe 234 to form a refrigerant pipe 231, an inlet pipe 232 of the refrigerant pipe 231 is formed on one of the heat storage heat exchangers 230, and an outlet pipe 233 of the refrigerant pipe 231 is formed on the other heat storage heat exchanger 230.
The electric heating element 220 may be disposed around or in the middle of the heat storage heat exchanger 230. In particular, here, both the electric heating element 220 and the perturbation element 310 are arranged between the two heat accumulating heat exchangers 230. In addition, the air-conditioning and heat-storage device 200 further includes two heat exchanger brackets 240 disposed in the housing 210, where the two heat exchanger brackets 240 are disposed opposite to each other to respectively mount the two heat-storage heat exchangers 230. A side of the heat exchanger support 240 facing away from the other heat exchanger support 240 is configured with a plurality of fixing clips 241 along a circumference of the side, and the plurality of fixing clips 241 clip-fix the heat storage heat exchanger 230 to the heat exchanger support 240.
The specific manner in which perturber 310 is mounted is described in detail below.
Referring to fig. 4 to 6, in an embodiment, the housing 210 includes a housing body 211 for accommodating the thermal storage material and a housing cover 212 covering an upper end of the housing body 211; wherein the driver 320 is mounted to the housing cover 212; the upper end of the perturbation 310 is connected to the driver 320.
Specifically, an inner cavity for accommodating the heat storage material is formed in the shell 211, and the inner cavity is upward and is opened; the cover 212 covers the upper end of the housing 211 to cover the opening of the cavity (as shown in fig. 7). The driver 320 is mounted on the top surface of the cover 212, which not only facilitates maintenance of the driver 320, but also prevents the driver 320 from easily accessing the thermal storage material. The upper end of the perturbation member 310 is connected to the actuator 320, and the remainder of the perturbation member 310 is inserted into the thermal storage material in the housing body 211 through the housing cover 212. When the device is detached, the disturbance element 310 can be pulled out from the outside without opening the shell cover 212, so that the device is simple to detach and easy to operate.
Referring to fig. 4, 5 and 7, in one embodiment, the cover 212 is provided with an insertion opening 213 for inserting the disturbance element 310 into the housing 211, and an annular supporting portion 214 is protruding from the periphery of the insertion opening 213; the perturbation assembly 300 further includes a securing plate 330 for mounting the driver 320, the securing plate 330 covering the insertion opening 213 and being fixedly coupled to the annular support 214.
Specifically, the fixing plate 330 of the perturbation module 300 is covered on the insertion opening 213, the lower surface of the fixing plate 330 is supported by the annular supporting portion 214, and the circumference of the fixing plate 330 is fixedly connected with the annular supporting portion 214 through a fastening structure or a screw structure. The driver 320 of the disturbance module 300 is mounted on the top surface of the fixing plate 330, and the disturbance member 310 is inserted into the thermal storage material in the housing 211 from the driver 320 downward through the insertion opening.
Referring to fig. 5, 7 and 8, it is considered that heat of the heat storage material in the housing 210 may be dissipated from the insertion port 213 to the outside due to the communication between the insertion port 213 and the inner cavity of the housing 210. To reduce this, the annular support 214 optionally comprises two annular support ribs radially arranged therealong, with an annular groove 215 spaced between them; the lower surface of the fixing plate 330 is convexly provided with an annular rib 331, and the annular rib 331 is inserted into the annular groove 215. By the insertion engagement of the annular rib 331 of the fixing plate 330 with the annular groove 215 of the annular support portion 214, the gap between the fixing plate 330 and the periphery of the insertion port 213 can be reduced, the air tightness of the housing 210 can be improved, and the heat dissipation from the interior of the housing 210 can be reduced.
Further, a wiring port 216 communicating with the insertion port 213 is formed on a side wall of the annular supporting portion 214, and the wiring port 216 is adapted to pass through a wire of the electric control component in the housing 211. The electrical control means may be individual temperature sensors or electrical heaters 220. Because the trace port 216 is smaller, it is just for smaller diameter wires to pass through, so the heat dissipated from the trace port 216 is less, and is essentially negligible.
Based on any of the above embodiments, the perturbation 310 may be designed in a variety of ways for the specific shape and configuration of the perturbation 310, as described above. In this embodiment, the perturbation member 310 is a perturbation rod with a strip-shaped design, and the volume of the perturbation rod is smaller, so that the occupied perturbation space can be reduced.
Referring to fig. 4, it is considered that, during normal operation of the air conditioner thermal storage device 200, the temperature of the thermal storage material at the bottom of the cavity of the housing 211 is generally lower, and the temperature of the thermal storage material at the top of the cavity is higher, so that the depth of the disturbance member 310 extending into the housing 211 is preferably greater than or equal to 1/2 of the depth of the cavity of the housing 211 to ensure that the thermal storage material at the bottom and top of the cavity of the housing 211 is disturbed. In this way, the lower end of the disturbance member 310 can be ensured to approach or penetrate into the bottom of the inner cavity of the shell 211, so that the upper layer and the lower layer of the heat storage material can be disturbed, and the upper layer and the lower layer of the heat storage material can be effectively and uniformly mixed.
For ease of illustration, assuming that H 0 is represented as the depth of the interior cavity of the housing 211 and H 1 is represented as the depth of the perturbation 310 extending into the housing 211, there is H 1≥1/2H0, such as, but not limited to, H 1 may be equal to 1/2H 0、2/3H0、3/4H0, etc.
In one embodiment, since the upper end of the perturbation 310 needs to pass out of the upper side of the fixed plate to connect with the driver 320, while the rest of the perturbation 310 is in contact with the thermal storage material, the heat of the thermal storage material may be conducted out through the perturbation 310. Thus, to avoid this, the perturbation 310 may optionally include a rigid body and a layer of insulating material disposed on the outer surface of the rigid body to encase the rigid body.
The hard body is made of hard material, such as metal or hard plastic, so that the disturbance member 310 has better strength and can strongly disturb the heat storage material. The heat insulating material layer is made of heat insulating material, and can be a material coating coated on the outer surface of the hard body or a heat insulating sleeve sleeved on the outer side surface of the hard body. Through setting up this stereoplasm body of insulating material layer parcel to separate disturbance piece 310 and heat accumulation material, the heat of heat accumulation material is difficult to be conducted to its stereoplasm body through the insulating material layer of disturbance piece 310, and then can not outwards be conducted away through disturbance piece 310.
With continued reference to FIG. 4, there are a variety of designs for the perturbation form of perturbation 310. In one embodiment, the perturbation element 310 is vibratable relative to the housing 210 to perturb the thermal storage material by vibration. That is, by driving the disturbance 310 to vibrate by the driver 320, the disturbance 310 vibrates the heat storage material around itself as a center to accelerate heat transfer inside the heat storage material, so that the heat storage amount of each portion of the heat storage material is uniform.
In another embodiment, the perturbation element 310 is rotatable relative to the housing 210 to perturb the thermal storage material by rotation. Specifically, the upper end of the disturbance member 310 is rotatably connected to the housing cover 212, the disturbance member 310 has a rotation axis consistent with the length direction thereof, and the disturbance member 310 is driven to rotate around the rotation axis by the driver 320 to stir the heat storage material, thereby accelerating heat transfer inside the heat storage material and also making the heat storage amount of each portion of the heat storage material uniform.
In yet another embodiment, the perturbation element 310 is swingable relative to the housing 210 to perturb the thermal storage material by swinging. For example, the perturbation 310 may oscillate either side-to-side or back-and-forth. That is, the disturbance member 310 corresponds to a swing arm, and the driver 320 drives the disturbance member 310 to swing reciprocally, so that the stirring of the heat storage material can be achieved, the heat transfer inside the heat storage material can be accelerated, and the heat storage amount of each part of the heat storage material can be uniform.
In still another embodiment, the perturbation element 310 is liftable relative to the housing 210 to perturb the thermal storage material by lifting. For example, a stirring sheet is arranged at the lower end of the disturbance element 310, the disturbance element 310 is driven to lift up and down by the driver 320, and the heat storage material is pushed and pulled up and down to stir, so that the upper layer heat storage material and the lower layer heat storage material are stirred and mixed uniformly, and the heat storage capacity of each part is further uniform more rapidly.
Based on any of the above embodiments, for the timing of turning on the disturbance module 300, the process of heating the heat storage material by the electric plate may be turned on in the air-conditioning heat storage device 200, while the disturbance module 300 is turned on; the perturbation module 300 may be turned on after the heating is completed. The first opening mode is adopted.
Referring to fig. 6 and 7, in an embodiment, the air-conditioning heat storage apparatus 200 further includes a control assembly including a controller connected to the driver 320, and a first temperature sensor 250 connected to the controller; the first temperature sensor 250 is disposed at the bottom of the heat storage material, and is configured to detect the bottom temperature T 1 of the heat storage material, and feed back the detected bottom temperature T 1 to the controller, so that the controller can determine whether to turn on the disturbance component 300.
Further, the control assembly further includes a second temperature sensor (not shown) connected to the controller, where the second temperature sensor is disposed in the middle of the heat storage material, and is configured to detect a middle temperature T 2 of the heat storage material, and feed back the detected middle temperature T 2 to the controller, so that the controller is configured to determine whether the disturbance assembly 300 needs to be turned on; and/or, the air-conditioning heat storage device 200 further includes a third temperature sensor (not shown) connected to the controller, where the third temperature sensor is disposed on top of the heat storage material, and is configured to detect a top temperature T 3 of the heat storage material, and feed back a detected middle temperature T 3 to the controller, so that the controller can be used to determine whether the disturbance component 300 needs to be turned on.
Referring to fig. 1 and 9, the present invention further provides an air conditioner 100, where the air conditioner 100 includes an air conditioner heat storage device 200, and the specific structure of the air conditioner heat storage device 200 refers to the above embodiment, and since the air conditioner 100 adopts all the technical solutions of all the embodiments, at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.
In an embodiment, the air conditioner further comprises a compressor 110, an outdoor heat exchanger 120, an indoor heat exchanger 130 and a first throttling device 140 connected in sequence; the compressor 110 has an exhaust pipe 111 and an air return pipe 112. The air conditioner further includes a first control valve 170, the first control valve 170 being disposed on the muffler 112 of the compressor 110; an inlet pipe 232 of a refrigerant pipe 231 of the air-conditioning heat storage device 200 is connected to an inlet side of the first control valve 170, and an outlet pipe 233 of the refrigerant pipe 231 is connected to an outlet side of the first control valve 170. The air conditioner further includes a second control valve 180 and a defrosting pipe 101, both ends of the defrosting pipe 101 are connected to both ends of the first throttling device 140, respectively, and the second control valve 180 is provided on the defrosting pipe 101.
For the first throttling means 140 described above, there are various implementations, such as a throttle valve, a capillary tube, an electronic expansion valve, etc. Specifically, the first throttle device 140 is a throttle valve. The first control valve 170 and the second control valve 180 may employ solenoid valves.
In the heating mode of the air conditioner, the first control valve 170 is opened, the second control valve 180 is closed, and the refrigerant flows back to the inside of the compressor 110 through the exhaust pipe 111 of the compressor 110, the indoor heat exchanger 130, the first throttling device 140, the outdoor heat exchanger 120, and the return pipe 112 of the compressor 110 in sequence. In this process, the refrigerant does not pass through the air-conditioning heat storage device 200.
In the defrosting mode of the air conditioner, the first control valve 170 is closed, the second control valve 180 is opened, and the refrigerant flows back into the compressor 110 through the exhaust pipe 111 of the compressor 110, the indoor heat exchanger 130, the defrosting pipe 101, the second control valve 180, the outdoor heat exchanger 120, the inlet side of the muffler 112 of the compressor 110, the inlet connecting pipe 232 of the air-conditioning heat storage device 200, the refrigerant pipeline 231, the outlet connecting pipe 233, and the outlet side of the muffler 112 of the compressor 110, which is positioned at the first control valve 170, in sequence.
Further, the air conditioner further includes a first pipe 102, a second pipe 103, and a switch 160; wherein the first pipe 102 connects the outdoor heat exchanger 120 and the first throttle device 140 in this order; the second pipe 103 connects the first throttle device 140 and the indoor heat exchanger 130 in this order. The switch 160 is switchable between a first state and a second state, wherein: in the first state, the switch 160 communicates the exhaust pipe 111 with the first pipe 102 and communicates the return pipe 112 with the second pipe 103; in the second state, the switch 160 communicates the return pipe 112 with the first pipe 102 and communicates the exhaust pipe 111 with the second pipe 103.
Specifically, the switch 160 is in the first state, and the air conditioning system is in the cooling mode; in the second state, the switch 160 is in a heating state or a defrost mode. By providing the switch 160, the air conditioner can be switched between the cooling mode and the heating mode. The switch 160 may be a four-way valve or two-way valves. The four-way valve is specifically selected for the switch 160, and four ports of the switch 160 are connected to the first pipe 102, the second pipe 103, the exhaust pipe 111, and the return pipe 112, respectively.
Further, the air conditioner further includes a second throttling device 150, and the second throttling device 150 is disposed on the inlet pipe 232 of the refrigerant pipe 233. For the second throttling means 150 described above, there are various realizations such as a throttle valve, a capillary tube, an electronic expansion valve, etc. In particular, the second throttling means 150 is a capillary tube.
The following explains each mode of the air conditioning system in detail:
Referring to fig. 9, in the cooling mode of the air conditioner 100, the switch 160 is switched to the first state, the compressor 110 discharges the high-temperature and high-pressure refrigerant from the exhaust pipe 111, and then the refrigerant enters the outdoor heat exchanger 120 from the first pipe 102 to be liquefied, and the liquefied refrigerant enters the indoor heat exchanger 130 through the first throttling device 140 to perform evaporation cooling. Then, the gaseous refrigerant evaporated and discharged from the indoor heat exchanger 130 flows back to the compressor 110 through the second pipe 103, the switch 160, and the return pipe 112, and is circulated again, thereby realizing cooling. In this mode, the first control valve 170 is open and the second control valve 180 is closed.
Referring to fig. 10, in the heating mode of the air conditioner 100, the switch 160 is switched to the second state, the compressor 110 discharges the high-temperature and high-pressure refrigerant from the exhaust pipe 111, and then enters the indoor heat exchanger 130 from the second pipe 103 to liquefy, liquefy and release heat in the indoor heat exchanger 130, thereby realizing heating; the liquefied liquid refrigerant enters the outdoor heat exchanger 120 through the first throttling device 140 for evaporation; then, the gaseous refrigerant evaporated from the outdoor heat exchanger 120 and discharged is returned to the compressor 110 through the first pipe 102, the switch 160, and the return pipe 112, and is circulated again, thereby realizing heating. In this mode, the first control valve 170 is open and the second control valve 180 is closed.
When the outdoor heat exchanger 120 frosts in the heating mode, the state of the switch 160 remains unchanged, but the first control valve 170 is switched to the closed state and the second control valve 180 is switched to the open state, thereby switching the heating mode to the defrosting mode.
Referring to fig. 11, in the defrosting mode, the compressor 110 discharges the high-temperature and high-pressure refrigerant from the exhaust pipe 111, and then enters the indoor heat exchanger 130 from the second pipe 103 to liquefy, and liquefies and discharges heat in the indoor heat exchanger 130 to realize heating; the refrigerant in the gas-liquid coexisting state flowing out of the indoor heat exchanger 130 enters the outdoor heat exchanger 120 through the defrosting pipe 103 and the second control valve 180 to be liquefied again, and the frost of the outdoor heat exchanger 120 is melted by the heat released by the liquefaction, so that defrosting is realized; then, the liquid refrigerant liquefied and discharged from the outdoor heat exchanger 120 flows into the inlet nipple 232 of the air-conditioning heat storage device 200 through the first pipe 102 and the switch 160, enters the refrigerant pipe 231 through the inlet nipple 232, exchanges heat with the heat storage material of the air-conditioning heat storage device 200, and is gasified to form a gaseous refrigerant, and the gaseous refrigerant finally flows back to the compressor 110 through the outlet nipple 233 and the muffler 112, and is circulated again.
As can be seen from the above-mentioned switching of the heating mode to the defrosting mode, during the switching process, the state of the switch 160 is not changed, the flow direction of the refrigerant in the refrigerant system of the air conditioner 100 is kept unchanged, the indoor heat exchanger 130 of the air conditioner 100 is kept in the heating state and is not changed to the cooling state, and the defrosting time can be shortened to within 3 minutes each time, so that the indoor environment temperature fluctuation is about 1 ℃ and not more than 2 ℃. Compared with 6 ℃ of indoor environment temperature fluctuation in a defrosting mode of the traditional air conditioner 100, which is required to switch the flow direction of the refrigerant, the air conditioner 100 can keep the indoor environment temperature fluctuation smaller, ensure that the air conditioner 100 supplies heat for the room normally, improve the comfort level of the air conditioner 100 and have better user experience effect.
The air conditioner 100 includes an air conditioner indoor unit and an air conditioner outdoor unit, wherein the indoor heat exchanger 130 is installed in the air conditioner indoor unit, and the compressor 110, the outdoor heat exchanger 120 and the air conditioner heat storage device 200 are all installed in the air conditioner outdoor unit. Optionally, the outdoor unit of the air conditioner is further configured with a mounting frame 400 at one side of the compressor 110, and the mounting frame 400 includes a base 410 and a mounting frame 420 circumferentially arranged along the base 410; the air-conditioning and heat-storage device 200 is mounted in the mounting frame 420 of the mounting bracket 400.
The present invention also provides a control method of an air conditioner, where the air conditioner 100 includes an air conditioner heat storage device 200, and specific structures of the air conditioner 100 and the air conditioner heat storage device 200 refer to the foregoing embodiments, and since the air conditioner 100 adopts all the technical solutions of all the foregoing embodiments, at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be described in detail herein.
In one embodiment, the control method of the air conditioner includes the steps of:
Step S10, controlling the air conditioner 100 to operate in a heating mode.
Specifically, in the step S10, after receiving the heating command sent by the remote controller, the air conditioner 100 may control the air conditioner 100 to operate according to a heating mode; when the air conditioner 100 detects that the indoor temperature is less than or equal to the heating mode start temperature, the air conditioner 100 may be controlled to operate according to the heating mode.
Step S20, acquiring the temperature Tw of the outdoor heat exchanger 120, and comparing the temperature Tw of the outdoor heat exchanger 120 with a defrosting preset temperature Ts pre-stored by a controller;
Step S30, under the condition that Tw is less than Ts, acquiring the bottom temperature T 1 of the heat storage material of the air-conditioning heat storage device 200, and comparing the bottom temperature T 1 of the heat storage material with the starting temperature Tr of the electric heating element 220 pre-stored by the controller;
Specifically, in this step S30, the temperature Tw of the outdoor heat exchanger 120 gradually decreases as the heating mode is operated. When the temperature Tw of the outdoor heat exchanger 120 is greater than or equal to the defrosting preset temperature Ts, it indicates that the outdoor heat exchanger 120 is not frosted or has a small frosting amount, and at this time, the air conditioner 100 may be controlled to continue to operate according to the heating mode or not. When the temperature Tw of the outdoor heat exchanger 120 is less than the preset defrosting temperature Ts, it is indicated that defrosting is required, so that the bottom temperature T 1 of the heat storage material is obtained to be compared with the starting temperature Tr of the electric heating element 220 pre-stored by the controller, so as to determine whether the electric heating element 220 needs to be turned on to store heat in the air conditioner heat storage device 200.
For the defrosting preset temperature Ts, the range of Ts may be greater than or equal to-2 ℃ and less than or equal to 2 ℃, i.e., -2 ℃ less than or equal to Ts less than or equal to 2 ℃, such as ts=0 ℃. When the temperature Ts is more than or equal to 0 ℃ and less than or equal to 2 ℃, the outdoor heat exchanger 120 is not frosted yet, and when the temperature Ts is more than or equal to-2 ℃ and less than or equal to 0 ℃, the frosting amount of the outdoor heat exchanger 120 is less, and the normal heating of the air conditioner is not influenced.
And S40, under the condition that T 1 is smaller than Tr, turning on the electric heating element 220.
Specifically, in this step S40, as the defrosting mode of the air conditioner 100 is operated, the heat stored in the heat storage material in the air conditioner heat storage device 200 is gradually reduced, and the temperature is gradually reduced, so that when the bottom temperature T 1 of the heat storage material is reduced to be less than the activation temperature Tr of the electric heating element 220, the electric heating element 220 is turned on to heat the heat storage material, and the heat stored in the air conditioner heat storage device 200 is supplemented, so that a sufficient amount of heat exchange is provided for defrosting the outdoor heat exchanger 120, to ensure that the air conditioner 100 can continuously and stably defrost the outdoor heat exchanger 120. When the bottom temperature T 1 of the heat storage material is equal to or higher than the start temperature Tr of the electric heating element 220, the heat of the heat storage material is still sufficient, and the heat exchange amount is not needed to be supplemented.
In step S50, the air conditioner 100 is controlled to switch to the defrosting mode to defrost the temperature of the outdoor heat exchanger 120.
Further, after the electric heating element 220 is turned on, before the air conditioner is controlled to be switched to the defrosting mode operation, the control method of the air conditioner further includes the steps of:
Step S41, obtaining the middle temperature T 2 and the top temperature T 3 of the heat storage material;
Step S42, comparing the delta T max with a preset temperature difference delta T 0 pre-stored by the controller; wherein Δt max is the maximum value of |t 3-T1 | and |t 2-T1 |;
In step S43, the disturbance module 300 is controlled to be turned on under the condition of Δt max＞ΔT0 to disturb the thermal storage material.
Specifically, when the maximum difference Δt max is smaller than the preset temperature difference Δt 0, it means that the difference between the temperature of the bottom of the heat storage material and the temperature of the middle and top of the heat storage material in the air conditioner heat storage device 200 is smaller, and the temperature of each interlayer position of the heat storage material is more uniform, i.e. the heat storage capacity of each interlayer position of the heat storage material is also more uniform, and the heat exchange rate is higher. When the maximum difference Δt max is greater than the preset temperature difference Δt 0, it means that the difference between the temperature differences between the bottom of the heat storage material and the middle and top of the heat storage material in the air conditioner heat storage device 200 is greater, that is, the heat storage amounts at the positions between the layers of the heat storage material are not uniform, and at this time, the disturbance component 300 is controlled to be turned on to disturb the heat storage material, so that the heat storage amounts at the positions between the layers of the heat storage material are disturbed to be uniformly distributed. Further, in this step, the intermediate temperature T 2 and the top temperature T 3 of the heat storage material may be acquired at the same time, and of course, only any one of them may be acquired. The range of DeltaT 0 may be 2℃to 3 ℃.
Further, the temperature of the activation temperature Tr of the electric heating element 220 is less than the freezing temperature of the heat storage material. The reason for this design is that during the defrosting test of the air-conditioning heat storage device 200, it is found that the bottom temperature of the heat storage material is relatively lower than the middle or top temperature thereof, so that freezing may occur at the bottom of the heat storage material. Therefore, in the foregoing step S30, by limiting the temperature of the activation temperature Tr of the electric heating element 220 to be less than the freezing temperature of the heat storage material, it is ensured that the electric heating element 220 is turned on before the bottom temperature T 1 of the heat storage material reaches the activation temperature Tr of the electric heating element 220, that is, before the bottom heat storage material is not frozen, so as to avoid freezing of the heat storage material.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (18)

1. An air conditioner heat storage device, characterized by comprising:
The air conditioner comprises a shell, wherein a refrigerant pipeline used for being connected with a pipeline of the air conditioner is arranged in the shell;
The heat storage material is filled in the shell and is positioned between the inner wall of the shell and the refrigerant pipeline; and
A disturbance assembly including a disturbance member interposed in the heat storage material, and a driver connected to the disturbance member, the driver being adapted to drive the disturbance member to disturb the heat storage material;
the shell comprises a shell body for accommodating the heat storage material and a shell cover covered at the upper end of the shell body; wherein the driver is mounted on the shell cover; the upper end of the disturbance element is connected with the driver;
the shell cover is provided with an insertion opening for inserting the disturbance piece into the shell body, and the periphery of the insertion opening is convexly provided with an annular supporting part; the disturbance assembly further comprises a fixed plate for installing the driver, and the fixed plate covers the insertion port and is fixedly connected with the annular supporting part;
The air conditioner heat storage device further comprises a control assembly, wherein the control assembly comprises a controller connected with the driver and a first temperature sensor connected with the controller; the first temperature sensor is arranged at the bottom of the heat storage material; the control assembly further comprises a second temperature sensor connected with the controller, and the second temperature sensor is arranged in the middle of the heat storage material; and/or the air-conditioning heat storage device further comprises a third temperature sensor connected with the controller, wherein the third temperature sensor is arranged on the top of the heat storage material; the air conditioner heat storage device further comprises an electric heating element arranged in the shell, wherein the electric heating element is inserted into a heat storage material in the shell;
The control method of the air conditioner comprises the following steps:
Controlling the air conditioner to operate according to a heating mode;
Acquiring the temperature Tw of the outdoor heat exchanger, and comparing the temperature Tw of the outdoor heat exchanger with a defrosting preset temperature Ts pre-stored by a controller;
Under the condition that Tw is less than Ts, acquiring the bottom temperature T 1 of a heat storage material of the air conditioner heat storage device, and comparing the bottom temperature T 1 of the heat storage material with the starting temperature Tr of an electric heating element pre-stored by a controller;
Turning on the electric heating element under the condition that T 1 is smaller than Tr;
controlling the air conditioner to switch to a defrosting mode;
After the electric heating element is started, before the air conditioner is controlled to be switched to the defrosting mode operation, the control method of the air conditioner further comprises the following steps:
Acquiring a middle temperature T 2 and a top temperature T 3 of the heat storage material;
Comparing the maximum difference DeltaT max with a preset temperature difference DeltaT 0 pre-stored by the controller; wherein, the maximum difference DeltaT max is the maximum value of |T 3-T1 | and |T 2-T1 |;
And under the condition of DeltaT max＞△T0, controlling the opening of the disturbance component to disturb the heat storage material.
2. The heat storage device of claim 1, wherein the annular support portion comprises two annular support ribs arranged radially therealong, and an annular groove is formed between the two annular support ribs; the lower surface of the fixing plate is convexly provided with annular ribs, and the annular ribs are inserted into the annular grooves.
3. The heat storage device of claim 1, wherein a wire opening is formed in a side wall of the annular support portion and is communicated with the insertion opening, and the wire opening is suitable for a wire of an electric control component in the housing to pass through.
4. An air conditioning and heat storage apparatus as claimed in any one of claims 1 to 3 wherein the depth to which the perturbation member extends into the housing is greater than or equal to 1/2 of the depth of the interior cavity of the housing.
5. An air conditioning and heat storage apparatus as claimed in any one of claims 1 to 3 wherein the perturbation includes a rigid body and a layer of insulating material disposed on an outer surface of the rigid body to encase the rigid body.
6. An air-conditioning heat storage apparatus as claimed in any one of claims 1 to 3, wherein said disturbance member is vibratable relative to said housing to disturb said heat storage material by vibration; or alternatively
The disturbance member is rotatable relative to the housing to disturb the heat storage material by rotation; or alternatively
The disturbing member is swingable relative to the housing to disturb the heat storage material by swinging; or alternatively
The disturbance member is liftable relative to the housing to disturb the heat storage material by lifting.
7. The air conditioner heat storage device as claimed in claim 1, wherein the electric heating member comprises an electric heating base plate and an electric heating main plate vertically arranged on the electric heating base plate; the air conditioner heat storage device is provided with the disturbance piece at one side or two sides of the electric heating main board.
8. An air-conditioning heat storage apparatus according to any one of claims 1 to 3, further comprising a heat storage heat exchanger disposed in the housing, the heat storage heat exchanger comprising a plurality of fins and refrigerant pipes connecting the plurality of fins therethrough, the refrigerant pipes being configured to form the refrigerant pipe.
9. The air-conditioning and heat storage apparatus according to claim 8, wherein the number of heat storage heat exchangers is at least two; the two heat storage heat exchangers are respectively arranged at two sides of the electric heating part, refrigerant pipes of the two heat storage heat exchangers are communicated through connecting pipes to form the refrigerant pipe, an inlet pipe of the refrigerant pipe is formed on one heat storage heat exchanger, and an outlet pipe of the refrigerant pipe is formed on the other heat storage heat exchanger.
10. The air-conditioning and heat-storage apparatus according to claim 9, further comprising two heat exchanger brackets disposed in the housing, the two heat exchanger brackets being disposed opposite to each other so as to be mounted in correspondence with the two heat-storage heat exchangers, respectively.
11. An air conditioner, characterized in that the air conditioner comprises the air-conditioning heat storage device according to any one of claims 1 to 10.
12. The air conditioner of claim 11, further comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a first throttling device connected in sequence; the compressor is provided with an exhaust pipe and an air return pipe;
The air conditioner further comprises a first control valve, and the first control valve is arranged on an air return pipe of the compressor; an inlet pipe of a refrigerant pipeline of the air conditioner heat storage device is connected to an inlet side of the first control valve, and an outlet pipe of the refrigerant pipeline is connected to an outlet side of the first control valve;
The air conditioner further comprises a second control valve and a defrosting pipe, wherein two ends of the defrosting pipe are respectively connected to two ends of the first throttling device, and the second control valve is arranged on the defrosting pipe.
13. The air conditioner of claim 12, further comprising a first pipe, a second pipe, and a switch; wherein the first piping connects the outdoor heat exchanger and the first throttling device in this order; the second piping is connected with the first throttling device and the indoor heat exchanger in sequence;
The switch is switchable between a first state and a second state, wherein:
In the first state, the switch communicates the exhaust pipe with the first pipe and communicates the muffler with the second pipe;
in the second state, the switcher communicates the muffler with the first pipe and communicates the exhaust pipe with the second pipe.
14. The air conditioner as set forth in claim 12, further comprising a second throttling device disposed on an inlet pipe of said refrigerant line.
15. A control method of an air conditioner, characterized in that the air conditioner is the air conditioner according to any one of claims 11 to 14; the control method of the air conditioner comprises the following steps:
Controlling the air conditioner to operate according to a heating mode;
Acquiring the temperature Tw of the outdoor heat exchanger, and comparing the temperature Tw of the outdoor heat exchanger with a defrosting preset temperature Ts pre-stored by a controller;
Under the condition that Tw is less than Ts, acquiring the bottom temperature T 1 of a heat storage material of the air conditioner heat storage device, and comparing the bottom temperature T 1 of the heat storage material with the starting temperature Tr of an electric heating element pre-stored by a controller;
Turning on the electric heating element under the condition that T 1 is smaller than Tr;
and controlling the air conditioner to switch to a defrosting mode.
16. The control method of an air conditioner according to claim 15, wherein after the electric heating member is turned on, before the air conditioner is controlled to be switched to the defrosting mode operation, the control method of the air conditioner further comprises the steps of:
Acquiring a middle temperature T 2 and a top temperature T 3 of the heat storage material;
Comparing the maximum difference DeltaT max with a preset temperature difference DeltaT 0 pre-stored by the controller; wherein, the maximum difference DeltaT max is the maximum value of |T 3-T1 | and |T 2-T1 |;
And under the condition of DeltaT max＞△T0, controlling the opening of the disturbance component to disturb the heat storage material.
17. The control method of an air conditioner according to claim 15, wherein a temperature of a start-up temperature Tr of the electric heating element is less than a freezing temperature of the heat storage material.
18. The method of controlling an air conditioner as set forth in claim 15, wherein the defrosting preset temperature Ts ranges from-2 ℃ to-2 ℃.
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