CN107192130B - Water heater and control method thereof - Google Patents

Water heater and control method thereof Download PDF

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Publication number
CN107192130B
CN107192130B CN201710444973.8A CN201710444973A CN107192130B CN 107192130 B CN107192130 B CN 107192130B CN 201710444973 A CN201710444973 A CN 201710444973A CN 107192130 B CN107192130 B CN 107192130B
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CN
China
Prior art keywords
heat exchanger
way valve
water heater
temperature
water tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710444973.8A
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Chinese (zh)
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CN107192130A (en
Inventor
古宗敏
陈文强
洪志荣
宋铭
张裕兆
李志方
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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Application filed by Midea Group Co Ltd, GD Midea Heating and Ventilating Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201710444973.8A priority Critical patent/CN107192130B/en
Publication of CN107192130A publication Critical patent/CN107192130A/en
Priority to PCT/CN2018/072474 priority patent/WO2018227964A1/en
Application granted granted Critical
Publication of CN107192130B publication Critical patent/CN107192130B/en
Active legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/136—Defrosting or de-icing; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • F24H15/175—Supplying heated water with desired temperature or desired range of temperature where the difference between the measured temperature and a set temperature is kept under a predetermined value
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/176—Improving or maintaining comfort of users
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • F24H15/225—Temperature of the water in the water storage tank at different heights of the tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/254—Room temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/32—Control of valves of switching valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
    • F24H15/429—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data for selecting operation modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H6/00—Combined water and air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/227—Temperature of the refrigerant in heat pump cycles
    • F24H15/231—Temperature of the refrigerant in heat pump cycles at the evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/235—Temperature of exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/281—Input from user
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • 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
    • F25B2347/023—Set point defrosting

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Computer Hardware Design (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The invention provides a water heater and a control method thereof. A water heater comprising: the system comprises a compressor, a four-way valve, a three-way valve, a first heat exchanger, a first fan assembly, a second fan assembly, a water tank, a second heat exchanger, a detection module and a controller; the air outlet of the compressor is connected to the first end of the four-way valve, the second end of the four-way valve is connected to one end of the first heat exchanger, and the third end of the four-way valve is connected to one end of the second heat exchanger; the other end of the first heat exchanger is connected with an external coil pipe at the upper part of the water tank; the other end of the second heat exchanger is connected with an external coil pipe at the lower part of the water tank; the three-way valve is arranged on a pipeline between the four-way valve and the first heat exchanger; the controller is connected with the detection module and used for controlling the start and stop of the first/second heat exchanger, the first/second fan assembly and the three-way valve according to the outdoor environment temperature and/or the temperature inside the water tank. Through the technical scheme of the invention, the problem of cold air blowing of the water heater is effectively improved, and better customer experience is realized.

Description

Water heater and control method thereof
Technical Field
The invention relates to the technical field of water heaters, in particular to a water heater and a control method of the water heater.
Background
Air conditioners are more and more commonly used, household air energy water heaters are more and more accepted by market customers, and in the technical precipitation, Japanese enterprises are in the front. In the design of conventional products, there are split type, integral type differentiation product design direction, many different fan schemes of top air-out, axial-flow air-out.
As shown in figure 1, the integral square air energy water heater product is provided with the compressor and the evaporator for absorbing heat, the fan blows out cold air in the using process, the evaporator absorbs low-grade heat energy in the air and leads the cold air to a kitchen through the top air outlet structure, and the temperature rise caused by cooking and cooking in the kitchen is reduced, so that better customer experience is realized. However, in practical application, customers often complain about, and especially when the air energy product is installed in a bathroom, in the bathing process, the blown cold air can cool the environmental temperature of the bathroom, so that the customers feel uncomfortable, and the comfort of the customers is directly affected.
Therefore, how to provide a scheme that can improve the problem that air can blow the product cold wind realizes better customer experience, becomes the technical problem that needs to be solved at present.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, an object of the invention is to propose a water heater.
Another object of the present invention is to provide a control method of a water heater.
In view of the above, the present invention provides a water heater, comprising: the system comprises a compressor, a four-way valve, a three-way valve, a first heat exchanger, a first fan assembly, a second fan assembly, a water tank, a second heat exchanger, a detection module and a controller; the air outlet of the compressor is connected to the first end of the four-way valve, the second end of the four-way valve is connected to one end of the first heat exchanger, and the third end of the four-way valve is connected to one end of the second heat exchanger; the other end of the first heat exchanger is connected with an external coil pipe at the upper part of the water tank; the other end of the second heat exchanger is connected with an external coil pipe at the lower part of the water tank; the three-way valve is arranged on a pipeline between the four-way valve and the first heat exchanger; the detection module is used for detecting the outdoor environment temperature and the temperature inside the water tank; the controller is connected with the detection module and used for controlling the start and stop of the first/second heat exchanger, the first/second fan assembly and the three-way valve according to the outdoor environment temperature and/or the temperature inside the water tank.
According to the water heater, a set of coil heat exchanger and a fan assembly are added on the basis of the existing water tank external coil heat exchanger, specifically, the air outlet of a compressor is connected to the first end of a four-way valve, the second end of the four-way valve is connected to one end of a first heat exchanger, the third end of the four-way valve is connected to one end of a second heat exchanger, the other end of the first heat exchanger is connected with an external coil on the upper part of a water tank, the other end of the second heat exchanger is connected with an external coil on the lower part of the water tank, and the three-way valve is arranged on a; the controller is matched with proper control logic according to the outdoor environment temperature and/or the temperature inside the water tank detected by the detection module so as to control the start and stop of the first heat exchanger, the second heat exchanger, the first fan assembly, the second fan assembly and the three-way valve; the water heater has the conventional hot water heating function, and also has multiple operation modes of heating air, simultaneously heating water, heating air and defrosting, so that the heating requirements of different spaces are met, the problem of blowing cold air by an air energy product is effectively improved, and the user experience is improved. For example, in the process of using hot water, the hot air heating mode is started, the ambient temperature of the bathing space is synchronously heated on the premise of ensuring the hot water, and therefore the comfort in the bathing process is ensured. It is worth pointing out that the invention is not limited to preheating the bathing environment temperature, and can meet the heating requirements of different spaces.
When the water heater is started to be in a hot water and hot air making mode, the control module controls the first heat exchanger and the first fan assembly to be started, and controls the three-way valve to be started in a first working state, and the refrigerant circulation process is that the refrigerant passes through an exhaust port of the compressor, the four-way valve, the three-way valve, the first heat exchanger, the water tank, the throttling device, the second heat exchanger, the four-way valve and an air inlet of the compressor; when the water heater is in a hot air heating mode, the control module controls the second heat exchanger and the second fan assembly to be opened, the three-way valve is in a second working state, and the first heat exchanger and the first fan assembly are closed; when the water heater is started to heat water, the control module controls the first heat exchanger and the first fan assembly to be closed and controls the three-way valve to be started in a first working state, and the refrigerant circulation process is that the refrigerant passes through an exhaust port of the compressor, the four-way valve, the three-way valve, the water tank, the throttling device, the second heat exchanger, the four-way valve and an air inlet of the compressor; when the defrosting mode of the water heater is started, the control module controls the second heat exchanger, the second fan assembly to be started and the three-way valve to be opened to be in a second working state so as to remove a frost layer formed on the surface of the second heat exchanger, and the refrigerant circulation process is the same as that of the heating air mode.
In addition, the water heater according to the present invention may further have the following additional features:
in the above technical solution, preferably, the water heater further includes: and the throttling device is arranged between the second heat exchanger and the water tank.
In the technical scheme, the throttling device is arranged between the second heat exchanger and the water tank, so that the temperature can be effectively reduced, the pressure can be reduced, the flow of a refrigerant can be adjusted, the outlet of the heat exchanger is prevented from being overheated, and the effects of saving energy, reducing consumption and improving the heating effect of the water heater are achieved.
In any one of the above technical solutions, preferably, the water heater further includes: and the air return pipe is used for connecting the air inlet of the compressor with the fourth end of the four-way valve.
In the technical scheme, the air inlet of the compressor is connected with the fourth end of the four-way valve through the air return pipe, and the direction of the compressor exhaust pipe and the direction of the air return pipe entering the heat exchanger are switched, so that different operation modes are realized, and different heating requirements are met.
In any of the above technical solutions, preferably, the detection module includes a first temperature sensor and a second temperature sensor; the first temperature sensor is arranged on a pipeline between the four-way valve and the second heat exchanger, is positioned near one end of the second heat exchanger and is used for detecting the outdoor environment temperature; and the second temperature sensor is arranged on the water tank, is positioned on the upper part of the water tank and is used for detecting the temperature inside the water tank.
In this technical scheme, detect outdoor ambient temperature through first temperature sensor, second temperature sensor detects the inside temperature of water tank to the controller matches appropriate control logic according to the outdoor ambient temperature who detects and the inside temperature of water tank, stops with opening of control heat exchanger, fan subassembly and three-way valve, and then realizes multiple operating mode, satisfies the different use scene demands of user.
The invention also provides a control method of the water heater, which is used for the water heater in any one of the technical schemes, and the control method comprises the following steps: receiving a working mode selection instruction, and controlling the water heater to start a corresponding working mode according to the working mode selection instruction; detecting the outdoor ambient temperature and/or the temperature inside the water tank; and controlling the start and stop of the first/second heat exchanger, the first/second fan assembly and the three-way valve according to the outdoor environment temperature and/or the temperature inside the water tank.
According to the control method of the water heater, a user can select the operation mode of the water heater according to different use requirements, and the start and stop of the first heat exchanger, the second heat exchanger, the first fan assembly, the second fan assembly and the three-way valve are controlled according to the outdoor environment temperature and/or the temperature inside the water tank, so that the water heater has a plurality of operation modes of heating hot air, heating water, heating hot air and defrosting simultaneously besides the conventional water heating function, thereby meeting the heating requirements of different spaces, effectively improving the cold air blowing problem of air energy products and improving the user experience. For example, in the process of using hot water, the hot air heating mode is started, the ambient temperature of the bathing space is synchronously heated on the premise of ensuring the hot water, and therefore the comfort in the bathing process is ensured. It is worth pointing out that the invention is not limited to preheating the bathing environment temperature, and can meet the heating requirements of different spaces.
In the above technical scheme, preferably, when the water heater starts a hot water and hot air making mode, the first heat exchanger and the first fan assembly are controlled to be opened, and the three-way valve is controlled to be opened in a first working state; detecting the temperature inside the water tank; judging whether the temperature inside the water tank is greater than or equal to a first preset temperature or not; when the temperature in the water tank is judged to be larger than or equal to the first preset temperature, the first heat exchanger, the first fan assembly and the three-way valve are controlled to enter a standby state.
In the technical scheme, when the water heater is in a hot water making and heating mode, the first heat exchanger and the first fan assembly are opened, the first working state of the three-way valve is opened, a refrigerant enters the compressor to form circulation after passing through the compressor exhaust port, the four-way valve, the three-way valve, the first heat exchanger, the water tank, the throttling device, the second heat exchanger, the four-way valve and the compressor air inlet, the temperature inside the water tank is detected, and when the temperature inside the water tank is at the first preset temperature, the first heat exchanger, the first fan assembly and the three-way valve are controlled to enter a standby state. Therefore, on the premise of ensuring hot water, the temperature in the bathing space is synchronously preheated by the heat of the original hot water, and the comfort of the bathing process is effectively improved. It is worth pointing out that the invention is not limited to preheating the bathing environment temperature, and can meet the heating requirements of different spaces.
In any of the above technical solutions, preferably, when the water heater starts the hot air heating mode, the second heat exchanger and the second fan assembly are controlled to be opened, and the three-way valve is controlled to be opened in the second working state; detecting the temperature inside the water tank and the outdoor environment temperature; recording the starting duration of the hot air making mode; judging whether the starting time length is less than or equal to a preset time length or not; when the starting duration is judged to be less than or equal to the preset duration, comparing the temperature inside the water tank with a first preset temperature, and comparing the outdoor environment temperature with a second preset temperature; adjusting the working mode of the water heater according to the comparison result; and when the opening duration is judged to be greater than the preset duration, controlling the water heater to close the heating air mode.
In the technical scheme, when the water heater is in a hot air heating mode, a second heat exchanger and a second fan assembly are opened, a three-way valve is opened, the first heat exchanger and the first fan assembly are closed, and a refrigerant enters the compressor to form circulation after passing through an exhaust port of the compressor, the second heat exchanger, a throttling device, a water tank, the three-way valve, a four-way valve and an air inlet of the compressor; in order to ensure the heating effect of the water heater, when the starting time of the heating air mode exceeds the preset time, the starting time is generally set to be 20 minutes, and the heating air is directly closed; when the heating wind mode is started within the preset time, the working mode of the water heater is adjusted according to the temperature inside the water tank and the outdoor environment temperature, so that the heating wind demand of a user is met, and the heating effect of the water heater is ensured.
In any of the above technical solutions, preferably, the step of adjusting the operating mode of the water heater according to the comparison result specifically includes: when the difference value between the first preset temperature and the temperature in the water tank is smaller than a first preset threshold value, controlling the water heater to close the heating air mode; and when the outdoor environment temperature is higher than the second preset temperature, controlling the water heater to close the heating air mode and open the heating water mode.
In the technical scheme, when the difference value between the first preset temperature and the temperature inside the water tank is smaller than a first preset threshold value, hot air heating is stopped in advance, the water heater is controlled to be started for heat preservation, and hot water heating can be started only after the heat preservation is finished; and when the outdoor environment temperature is higher than the second preset temperature, closing the heating air and directly opening the heating water.
In any one of the above technical solutions, preferably, when the water heater starts the hot water heating mode, the first fan assembly is controlled to be closed, and the three-way valve is controlled to be opened in the first working state.
In the technical scheme, when the water heater is in a water heating mode, the first heat exchanger and the first fan assembly are closed, the first working state of the three-way valve is opened, a refrigerant passes through the exhaust port of the compressor, the four-way valve, the three-way valve, the water tank, the throttling device, the second heat exchanger and the four-way valve, enters the compressor after the air inlet of the compressor to form circulation, and automatically enters the compressor to preserve heat when the temperature in the water tank reaches the starting requirement point, so that hot water is produced.
In any one of the above technical solutions, preferably, when the water heater starts the defrosting mode, the second heat exchanger and the second fan assembly are controlled to be opened, and the three-way valve is controlled to be opened in the second working state.
In the technical scheme, when the defrosting mode of the water heater is started, the second heat exchanger, the second fan assembly and the second working state of the three-way valve are started to remove frost layers formed on the surface of the second heat exchanger, the refrigerant circulation process is the same as that of the heating air mode, and the water heater automatically enters the standby state after defrosting is completed.
In any of the above technical solutions, preferably, the preset duration range: 15 minutes to 20 minutes; range of the first preset threshold: 6 to 9; range of the second preset temperature: 18 to 22.
In the technical scheme, the value range of the preset time includes, but is not limited to, 15 minutes to 20 minutes; the value range of the first preset threshold includes, but is not limited to, 6 to 9; the second predetermined temperature range includes, but is not limited to, 18 to 22.
In any of the above technical solutions, preferably, the preset time period is 20 minutes; the first preset threshold value is 8; the second predetermined temperature is 20 deg.f.
In the technical scheme, the preset time is 20 minutes, the first preset threshold is 8, and the second preset temperature is 20, but not limited thereto.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic diagram of a prior art integral square air energy water heater;
FIG. 2 shows a schematic diagram of a water heater according to one embodiment of the invention;
FIG. 3 shows a flow chart diagram of a control method of a water heater according to one embodiment of the invention;
FIG. 4 shows a flow chart diagram of a control method of a water heater according to another embodiment of the invention;
FIG. 5 shows a flow chart diagram of a control method of a water heater according to yet another embodiment of the invention;
fig. 6 shows a schematic control diagram of a water heater according to an embodiment of the present invention.
Wherein, the corresponding relationship between the reference numbers and the names of the components in fig. 2 is:
the system comprises a compressor 10, a four-way valve 12, a three-way valve 14, a first heat exchanger 16, a first fan assembly 18, a second heat exchanger 20, a second fan assembly 22, a water tank 24, a throttling device 26, a return air pipe 28, a first temperature sensor 30 and a second temperature sensor 32.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A water heater according to some embodiments of the present invention is described below with reference to fig. 2.
As shown in fig. 2, the present invention proposes a water heater comprising: the system comprises a compressor 10, a four-way valve 12, a three-way valve 14, a first heat exchanger 16, a first fan assembly 18, a second fan assembly 22, a water tank 24, a second heat exchanger 20, a detection module and a controller; wherein, the air outlet of the compressor 10 is connected to a first end of the four-way valve 12, a second end of the four-way valve 12 is connected to one end of the first heat exchanger 16, and a third end of the four-way valve 12 is connected to one end of the second heat exchanger 20; the other end of the first heat exchanger 16 is connected with an external coil pipe at the upper part of the water tank 24; the other end of the second heat exchanger 20 is connected with an external coil pipe at the lower part of the water tank 24; the three-way valve 14 is disposed on a pipe between the four-way valve 12 and the first heat exchanger 16; the detection module is used for detecting the outdoor environment temperature and the temperature inside the water tank 24; the controller is connected to the detection module and is configured to control the start and stop of the first/second heat exchanger 20, the first/second fan assembly 22, and the three-way valve 14 according to the operating mode of the water heater, the outdoor ambient temperature, and/or the temperature inside the water tank 24.
The water heater provided by the invention is additionally provided with a coil heat exchanger and a fan assembly on the basis of the existing coil heat exchanger outside a water tank 24, specifically, the air outlet of a compressor 10 is connected to the first end of a four-way valve 12, the second end of the four-way valve 12 is connected to one end of a first heat exchanger 16, the third end of the four-way valve 12 is connected to one end of a second heat exchanger 20, the other end of the first heat exchanger 16 is connected with the outer coil on the upper part of the water tank 24, the other end of the second heat exchanger 20 is connected with the outer coil on the lower part of the water tank 24, and a three-way valve 14 is arranged on a; the controller matches a proper control logic according to the outdoor environment temperature and/or the temperature inside the water tank 24 detected by the detection module so as to control the start and stop of the first heat exchanger 20, the second heat exchanger 20, the first fan assembly 22, the second fan assembly 22 and the three-way valve 14; the water heater has the conventional hot water heating function, and also has multiple operation modes of heating air, simultaneously heating water, heating air and defrosting, so that the heating requirements of different spaces are met, the problem of blowing cold air by an air energy product is effectively improved, and the user experience is improved. For example, in the process of using hot water, the hot air heating mode is started, the ambient temperature of the bathing space is synchronously heated on the premise of ensuring the hot water, and therefore the comfort in the bathing process is ensured. It is worth pointing out that the invention is not limited to preheating the bathing environment temperature, and can meet the heating requirements of different spaces.
When the water heater is started to be in a hot water and hot air making mode, the control module controls the first heat exchanger 16 and the first fan assembly 18 to be started, and controls the three-way valve 14 to be started in a first working state, and the refrigerant circulation process is that the refrigerant passes through an air outlet of the compressor 10, the four-way valve 12, the three-way valve 14, the first heat exchanger 16, the water tank 24, the throttling device 26, the second heat exchanger 20, the four-way valve 12 and an air inlet of the compressor 10; when the water heater starts a hot air heating mode, the control module controls the second heat exchanger 20 and the second fan assembly 22 to be opened, the three-way valve 14 to be opened in a second working state, and the first heat exchanger 16 and the first fan assembly 18 to be closed, wherein a refrigerant circulating process is that the refrigerant passes through an air outlet of the compressor 10, the second heat exchanger 20, the throttling device 26, the water tank 24, the three-way valve 14, the four-way valve 12 and an air inlet of the compressor 10; when the water heater is started to heat water, the control module controls the first heat exchanger 16 and the first fan assembly 18 to be closed and controls the three-way valve 14 to be started in a first working state, and the refrigerant circulation process is that the refrigerant passes through an air outlet of the compressor 10, the four-way valve 12, the three-way valve 14, the water tank 24, the throttling device 26, the second heat exchanger 20, the four-way valve 12 and an air inlet of the compressor 10; when the defrosting mode of the water heater is started, the control module controls the second heat exchanger 20, the second fan assembly 22 to be started and the three-way valve 14 to be started in a second working state so as to remove the frost layer formed on the surface of the second heat exchanger 20, and the refrigerant circulation process is the same as that of the heating air mode.
In the above embodiment, preferably, the water heater further includes: a throttle device 26, the throttle device 26 being arranged between the second heat exchanger 20 and the water tank 24.
In this embodiment, the throttling device 26 is disposed between the second heat exchanger 20 and the water tank 24, so as to effectively reduce the temperature, reduce the pressure, and adjust the flow rate of the refrigerant, and prevent the outlet of the heat exchanger from overheating, thereby achieving the effects of saving energy, reducing consumption, and improving the heating effect of the water heater.
In any of the above embodiments, preferably, the water heater further includes: and a gas return pipe 28, wherein the gas return pipe 28 is used for connecting the gas inlet of the compressor 10 with the fourth end of the four-way valve 12.
In this embodiment, the air return pipe 28 connects the air inlet of the compressor 10 with the fourth end of the four-way valve 12, and the direction of the exhaust pipe of the compressor 10 and the direction of the air return pipe 28 entering the heat exchanger are switched, so as to achieve different operation modes and further meet different heating requirements.
In any of the above embodiments, preferably, the detection module comprises a first temperature sensor 30 and a second temperature sensor 32; wherein, the first temperature sensor 30, set up on the pipeline between second heat exchanger 20 and the four-way valve 12, locate near one end of the second heat exchanger 20, is used for detecting the outdoor ambient temperature; and a second temperature sensor 32 provided on the water tank 24 at an upper portion of the water tank 24 for sensing the temperature inside the water tank 24.
In this embodiment, the outdoor environment temperature is detected by the first temperature sensor 30, and the temperature inside the water tank 24 is detected by the second temperature sensor 32, so that the controller matches a proper control logic according to the detected outdoor environment temperature and the temperature inside the water tank 24, so as to control the start and stop of the heat exchanger, the fan assembly and the three-way valve 14, thereby realizing multiple operation modes and meeting the requirements of users in different use scenes.
As shown in fig. 3, a flow chart of a control method of a water heater according to an embodiment of the invention is shown. Wherein the control method 300 is for a water heater as in any of the above embodiments, the control method 300 comprising:
step 302, receiving a working mode selection instruction, and controlling the water heater to start a corresponding working mode according to the working mode selection instruction;
step 304, detecting the outdoor environment temperature and/or the temperature inside the water tank;
and step 306, controlling the start and stop of the first/second heat exchanger, the first/second fan assembly and the three-way valve according to the outdoor environment temperature and/or the temperature inside the water tank.
According to the control method of the water heater, a user can select the operation mode of the water heater according to different use requirements, and the start and stop of the first heat exchanger, the second heat exchanger, the first fan assembly, the second fan assembly and the three-way valve are controlled according to the outdoor environment temperature and/or the temperature inside the water tank, so that the water heater has a plurality of operation modes of heating hot air, heating water, heating hot air and defrosting simultaneously besides the conventional water heating function, the heating requirements of different spaces are met, the cold air blowing problem of an air energy product is effectively improved, and the user experience is improved. For example, in the process of using hot water, the hot air heating mode is started, the ambient temperature of the bathing space is synchronously heated on the premise of ensuring the hot water, and therefore the comfort in the bathing process is ensured. It is worth pointing out that the invention is not limited to preheating the bathing environment temperature, and can meet the heating requirements of different spaces.
As shown in fig. 4, a flow chart of a control method of a water heater according to another embodiment of the invention is schematically shown. Wherein the control method 400 is for a water heater as in any of the above embodiments, the control method 400 comprising:
step 402, receiving a working mode selection instruction, and controlling the water heater to start a corresponding working mode according to the working mode selection instruction;
step 404, when the water heater starts a hot water and hot air making mode, controlling the first heat exchanger and the first fan assembly to be opened, and controlling the three-way valve to be opened in a first working state;
step 406, detecting the temperature inside the water tank;
step 408, judging whether the temperature inside the water tank is greater than or equal to a first preset temperature;
step 410, when the temperature inside the water tank is judged to be greater than or equal to a first preset temperature, controlling the first heat exchanger, the first fan assembly and the three-way valve to enter a standby state; when it is determined that the temperature inside the water tank is less than the first preset temperature, the process returns to step 406.
In this embodiment, when the water heater is in the hot water and hot air making mode, the first heat exchanger and the first fan assembly are turned on to turn on the first working state of the three-way valve, and the refrigerant enters the compressor to form a circulation after passing through the compressor exhaust port, the four-way valve, the three-way valve, the first heat exchanger, the water tank, the throttling device, the second heat exchanger, the four-way valve and the compressor air inlet, so as to detect the temperature inside the water tank, and when the temperature inside the water tank is at the first preset temperature, the first heat exchanger, the first fan assembly and the three-way valve are controlled to enter. Therefore, on the premise of ensuring hot water, the temperature in the bathing space is synchronously preheated by the heat of the original hot water, and the comfort of the bathing process is effectively improved. It is worth pointing out that the invention is not limited to preheating the bathing environment temperature, and can meet the heating requirements of different spaces.
As shown in fig. 5, a flow chart of a control method of a water heater according to still another embodiment of the present invention is schematically shown. Wherein the control method 500 is for a water heater as in any of the above embodiments, the control method 500 comprising:
step 502, receiving a working mode selection instruction, and controlling the water heater to start a corresponding working mode according to the working mode selection instruction;
step 504, when the water heater starts a hot water and hot air making mode, controlling the first heat exchanger and the first fan assembly to be opened, and controlling the three-way valve to be opened in a first working state;
step 506, detecting the temperature inside the water tank;
step 508, judging whether the temperature inside the water tank is greater than or equal to a first preset temperature;
step 510, when the temperature inside the water tank is judged to be greater than or equal to a first preset temperature, controlling the first heat exchanger, the first fan assembly and the three-way valve to enter a standby state;
step 512, when the water heater starts a hot air heating mode, controlling the second heat exchanger and the second fan assembly to be started, and controlling the three-way valve to start a second working state;
step 514, detecting the temperature inside the water tank and the outdoor environment temperature,
step 516, recording the starting duration of the hot air making mode;
step 518, judging whether the starting time length is less than or equal to a preset time length;
step 520, when the opening duration is judged to be less than or equal to the preset duration, comparing the temperature inside the water tank with a first preset temperature, and comparing the outdoor environment temperature with a second preset temperature;
step 522, controlling the water heater to close the heating air mode when the difference value between the first preset temperature and the temperature in the water tank is smaller than a first preset threshold value;
when the outdoor environment temperature is higher than a second preset temperature, controlling the water heater to close the heating air mode and open the heating water mode;
step 524, controlling the water heater to close the heating air mode when the starting duration is judged to be greater than the preset duration;
step 526, when the water heater starts a water heating mode, controlling the first fan assembly to be closed and controlling the three-way valve to be opened in a first working state;
step 528, judging whether the temperature inside the water tank reaches a first preset temperature;
step 530, when the judgment result is yes, entering an original mode standby heat preservation state; otherwise, return to step 526;
step 532, when the defrosting mode of the water heater is started, controlling the second heat exchanger and the second fan assembly to be started, and controlling the three-way valve to be started in a second working state;
step 534, judging whether defrosting is finished; when the defrosting is finished, executing step 530 to enter an original mode standby heat preservation state; otherwise, return to step 532.
In the embodiment, when the hot air heating mode of the water heater is started, the second heat exchanger and the second fan assembly are started, the three-way valve is started in a second working state, and the first heat exchanger and the first fan assembly are closed, so that the refrigerant enters the compressor to form circulation after passing through the compressor exhaust port, the second heat exchanger, the throttling device, the water tank, the three-way valve, the four-way valve and the compressor air inlet; in order to ensure the heating effect of the water heater, when the starting time of the heating air mode exceeds the preset time, the starting time is generally set to be 20 minutes, and the heating air is directly closed; when the heating wind mode is started within the preset time, the working mode of the water heater is adjusted according to the temperature inside the water tank and the outdoor environment temperature, so that the heating wind demand of a user is met, and the heating effect of the water heater is ensured.
When the difference value between the first preset temperature and the temperature inside the water tank is smaller than a first preset threshold value, stopping heating the hot water in advance, controlling the water heater to start to preserve heat, and starting heating the hot water only after the preservation is finished; and when the outdoor environment temperature is higher than the second preset temperature, closing the heating air and directly opening the heating water.
When the water heater is in a water heating mode, the first heat exchanger and the first fan assembly are closed, the first working state of the three-way valve is opened, a refrigerant passes through the exhaust port of the compressor, the four-way valve, the three-way valve, the water tank, the throttling device, the second heat exchanger and the four-way valve, enters the compressor after the air inlet of the compressor to form circulation, and automatically enters into the compressor to preserve heat when the temperature in the water tank reaches a starting requirement point, so that hot water is produced.
When the defrosting mode of the water heater is started, the second heat exchanger, the second fan assembly and the second working state of the three-way valve are started to remove the frost layer on the surface of the second heat exchanger, the refrigerant circulation process is the same as that of the heating air mode, and the water heater automatically enters a standby state after defrosting is finished.
In any of the above embodiments, preferably, the range of the preset duration is: 15 minutes to 20 minutes; range of the first preset threshold: 6 to 9; range of the second preset temperature: 18 to 22.
In this embodiment, the range of the preset time period includes, but is not limited to, 15 minutes to 20 minutes; the value range of the first preset threshold includes, but is not limited to, 6 to 9; the second predetermined temperature range includes, but is not limited to, 18 to 22.
In any of the above embodiments, preferably, the preset time period is 20 minutes; the first preset threshold value is 8; the second predetermined temperature is 20 deg.f.
In this embodiment, the preset time period is 20 minutes, the first preset threshold is 8, and the second preset temperature is 20, but not limited thereto.
Fig. 6 is a schematic diagram illustrating the control principle of a water heater according to an embodiment of the present invention. The water heater comprises a compressor, a four-way reversing valve, an exhaust temperature sensor TP, an outdoor temperature sensor TA, an evaporator temperature sensor T3, an electronic throttling component, a fan assembly a, a heat exchanger a, an outer coil water tank, a water tank upper temperature sensor TH, a water tank lower temperature sensor TL, a fan assembly b, a heat exchanger b, an electric three-way valve and a main control board.
In the embodiment, the main control board controls the on-off of the compressor, the four-way reversing valve, the electronic throttling component, the fan component a and the fan component b according to measured data transmitted by the exhaust temperature sensor TP, the outdoor temperature sensor TA, the evaporator temperature sensor T3, the water tank upper temperature sensor TH and the water tank lower temperature sensor TL, and improves the cold air blowing problem of the air energy product to a certain extent through optimizing control logic, so that the water heater not only has the conventional hot water heating function, but also can prepare hot air for preheating the environmental temperature in the bathing environment, ensures the comfort of the bathing process, and simultaneously heats water, heats the hot air and multiple operating modes of defrosting, and greatly improves the user experience.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (12)

1. A water heater, comprising:
the system comprises a compressor, a four-way valve, a three-way valve, a first heat exchanger, a first fan assembly, a second heat exchanger, a second fan assembly, a water tank, a detection module and a controller; wherein the content of the first and second substances,
the air outlet of the compressor is connected to the first end of the four-way valve, the second end of the four-way valve is connected to one end of the first heat exchanger, and the third end of the four-way valve is connected to one end of the second heat exchanger;
the other end of the first heat exchanger is connected with an external coil pipe at the upper part of the water tank;
the other end of the second heat exchanger is connected with an external coil pipe at the lower part of the water tank;
the three-way valve is arranged on a pipeline between the four-way valve and the first heat exchanger;
the detection module is used for detecting the outdoor environment temperature and the temperature inside the water tank;
the controller is connected with the detection module and used for controlling the start and stop of the first/second heat exchanger, the first/second fan assembly and the three-way valve according to the outdoor environment temperature and/or the temperature in the water tank.
2. The water heater of claim 1, further comprising:
a throttling device disposed between the second heat exchanger and the water tank.
3. The water heater of claim 1, further comprising:
and the air return pipe is used for connecting the air inlet of the compressor and the fourth end of the four-way valve.
4. The water heater according to any one of claims 1 to 3,
the detection module comprises a first temperature sensor and a second temperature sensor; wherein the content of the first and second substances,
the first temperature sensor is arranged on a pipeline between the four-way valve and the second heat exchanger, is positioned near one end of the second heat exchanger and is used for detecting the outdoor environment temperature;
and the second temperature sensor is arranged on the water tank, is positioned at the upper part of the water tank and is used for detecting the temperature inside the water tank.
5. A control method of a water heater for a water heater according to any one of claims 1 to 4, characterized in that the control method comprises:
receiving a working mode selection instruction, and controlling the water heater to start a corresponding working mode according to the working mode selection instruction;
detecting the outdoor ambient temperature and/or the temperature inside the water tank;
and controlling the start and stop of the first/second heat exchanger, the first/second fan assembly and the three-way valve according to the outdoor environment temperature and/or the temperature in the water tank.
6. The control method of a water heater according to claim 5,
when the water heater starts a hot water and hot air making mode, the first heat exchanger and the first fan assembly are controlled to be opened, and the three-way valve is controlled to be opened in a first working state;
detecting a temperature inside the water tank;
judging whether the temperature inside the water tank is greater than or equal to a first preset temperature or not;
and when the temperature in the water tank is judged to be more than or equal to a first preset temperature, controlling the first heat exchanger, the first fan assembly and the three-way valve to enter a standby state.
7. The control method of a water heater according to claim 6,
when the water heater is in a hot air heating mode, the second heat exchanger and the second fan assembly are controlled to be opened, and the three-way valve is controlled to be opened in a second working state;
detecting the temperature inside the water tank and the outdoor environment temperature;
recording the starting time of the heating wind mode;
judging whether the starting time length is less than or equal to a preset time length or not;
when the starting time length is judged to be less than or equal to a preset time length, comparing the temperature inside the water tank with a first preset temperature, and comparing the outdoor environment temperature with a second preset temperature;
adjusting the working mode of the water heater according to the comparison result;
and when the opening duration is judged to be greater than the preset duration, controlling the water heater to close the heating air mode.
8. The method for controlling a water heater according to claim 7, wherein the step of adjusting the operation mode of the water heater according to the comparison result specifically comprises:
when the difference value between the first preset temperature and the temperature inside the water tank is smaller than a first preset threshold value, controlling the water heater to close the heating air mode;
and when the outdoor environment temperature is higher than a second preset temperature, controlling the water heater to close the heating air mode and start the heating water mode.
9. The control method of a water heater according to claim 8,
when the water heater is in a hot water making mode, the first heat exchanger and the first fan assembly are controlled to be closed, and the three-way valve is controlled to be in the first working state.
10. The control method of a water heater according to claim 5,
and when the defrosting mode of the water heater is started, the second heat exchanger and the second fan assembly are controlled to be started, and the three-way valve is controlled to be started in a second working state.
11. The control method of a water heater according to claim 8,
the preset duration range is as follows: 15 minutes to 20 minutes;
the range of the first preset threshold value: 6 to 9;
the second preset temperature range: 18 to 22.
12. The control method of a water heater according to claim 11,
the preset time is 20 minutes;
the first preset threshold value is 8;
the second preset temperature is 20 deg.f.
CN201710444973.8A 2017-06-12 2017-06-12 Water heater and control method thereof Active CN107192130B (en)

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