CN110131889B - Heat pump water heater, control method, and computer-readable storage medium - Google Patents

Heat pump water heater, control method, and computer-readable storage medium Download PDF

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Publication number
CN110131889B
CN110131889B CN201910420197.7A CN201910420197A CN110131889B CN 110131889 B CN110131889 B CN 110131889B CN 201910420197 A CN201910420197 A CN 201910420197A CN 110131889 B CN110131889 B CN 110131889B
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China
Prior art keywords
temperature
water
heat
heat pump
water tank
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CN201910420197.7A
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CN110131889A (en
Inventor
卫鹏云
刘纯
王臣臣
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Midea Group Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
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Midea Group Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
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    • 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
    • F24H4/04—Storage 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
    • F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
    • 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
    • F24H9/0005—Details for 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
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1818—Arrangement or mounting of electric heating means
    • 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

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

Abstract

The invention provides a heat pump water heater, a control method and a computer readable storage medium, wherein the heat pump water heater comprises: a housing; the heating system is arranged in the shell and comprises a compressor and an evaporator which are connected through pipelines; the water tank is arranged in the shell, and a water tank heat exchanger with two ends respectively connected with the compressor and the evaporator pipeline is arranged in the water tank; the heat accumulation box is arranged in the shell, the heat accumulation box and the water tank are connected through a pipeline, a heat accumulation heat exchanger is arranged in the heat accumulation box, one end of the heat accumulation heat exchanger is connected with the pipeline of the water tank heat exchanger, the other end of the heat accumulation heat exchanger is connected with the pipeline of the compressor or the evaporator, and a plurality of first temperature sensors are arranged on the water tank to control the opening and closing of the compressor according to the temperature acquired by the first temperature sensors. Through the technical scheme of the invention, the volume of the heat pump water heater can be effectively reduced, the energy-saving effect is exerted, and the sudden drop of the water temperature of the traditional water tank in the use process is avoided.

Description

Heat pump water heater, control method, and computer-readable storage medium
Technical Field
The invention relates to the technical field of heating and ventilation equipment, in particular to a heat pump water heater, a control method and a computer readable storage medium.
Background
At present, the user needs water heater output hot water to be used for taking a bath, wash one's face and rinse one's mouth etc. in the life, the hanging heat pump water heater on the market is the water storage formula mostly, heat the water in the water tank through heat pump system, however, along with the increase of user to the domestic water demand, the volume of water storage formula hanging heat pump water heater increases thereupon, weight gain, occupy too much space, ordinary phase transition heat accumulation formula heat pump water heater is higher because required phase transition temperature point, be unfavorable for heat pump system performance energy-saving effect, in addition, traditional heat pump water heater water tank is perhaps descends suddenly at water in-process temperature, cause inconvenience to user's use.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
In view of the above, an object of the present invention is to provide a heat pump water heater.
The invention also aims to correspondingly provide a control method applied to the heat pump water heater.
It is still another object of the present invention to provide a computer-readable storage medium.
In order to achieve at least one of the above objects, a heat pump water heater according to a first aspect of the present invention is provided, including: a housing; the heating system is arranged in the shell and comprises a compressor and an evaporator which are connected through pipelines; the water tank is arranged in the shell, and a water tank heat exchanger with two ends respectively connected with the compressor and the evaporator pipeline is arranged in the water tank; the heat accumulation box is arranged in the shell, the heat accumulation box and the water tank are connected through a pipeline, a heat accumulation heat exchanger is arranged in the heat accumulation box, one end of the heat accumulation heat exchanger is connected with the pipeline of the water tank heat exchanger, the other end of the heat accumulation heat exchanger is connected with the pipeline of the compressor or the evaporator, and a plurality of first temperature sensors are arranged on the water tank to control the opening and closing of the compressor according to the temperature acquired by the first temperature sensors.
According to the heat pump water heater, the heating system, the water tank and the heat storage tank body are arranged in the shell, the heating system comprises the compressor and the evaporator which are connected through the pipeline, the water tank and the heat storage tank body are connected through the pipeline, cold water can flow between the water tank and the heat storage tank body through the pipeline, the water tank and the heat storage tank body are respectively provided with the water tank heat exchanger and the heat storage heat exchanger, two ends of the water tank heat exchanger are respectively connected with the compressor and the pipeline for evaporating the compressor, one end of the heat storage heat exchanger is connected with the pipeline of the water tank heat exchanger, the other end of the heat storage heat exchanger is connected with the compressor or the evaporator, specifically, when the heat pump system heats, high-temperature and high-pressure refrigerants discharged by the compressor respectively enter the water tank heat exchanger and the heat storage heat exchanger to respectively exchange heat with phase change materials in water in the water tank and the heat storage tank body, so that the temperature of the water in the water tank rises, and the heat released by the phase change materials in the heat storage tank body is absorbed and stored to complete phase change, the phase-change material after heat storage heats water flowing through the inner pipeline of the heat storage box body, after heating is completed, the refrigerant flows through the evaporator and returns to the compressor, so that the heat pump water heater can provide hot water for users in time, the water demand of the users is met, and the refrigerant is absorbed by the phase-change material in the heat storage box body after releasing heat through the heat storage box body to complete phase-change heat storage, so that cold water is heated subsequently. It should be noted that, a plurality of first temperature sensors are arranged in the water tank, and the switch of the compressor is controlled according to the temperature acquired by any one of the first temperature sensors, specifically, the temperature acquired by the first temperature sensor is compared with the temperature set by the user, when the temperature acquired by the first temperature sensor is higher than the temperature set by the user, the compressor is controlled to be turned off, the heating is stopped, and when the temperature acquired by the first temperature sensor is lower than the temperature set by the user, the compressor is controlled to be turned on, the heating is started, so that the heating control of the water tank and the heat storage box body is realized, and the use by the user is facilitated.
Wherein, preferably, the temperature to be compared with the temperature set by the user may be the smallest one of the temperatures detected by the plurality of first temperature sensors.
Understandably, the heat pump water heater can effectively reduce the volume and the weight of the heat pump water heater by applying a phase-change material heat storage technology, and in addition, the water tank heat exchanger and the heat storage heat exchanger are connected between the compressor and the evaporator through pipelines, on one hand, the phase-change heat storage technology is utilized, and more hot water can be provided under the condition of the same volume as that of the traditional heat pump water heater; on the other hand, the phase change heat storage box body for completing heat storage has a heat preservation effect, water flowing through the heat storage box body can be continuously heated in the water using process of a user, and the sudden drop of the water temperature in the water tank of the common heat pump water heater can be effectively avoided, so that the water using experience of the user is influenced.
In addition, the heat pump water heater in the above embodiment provided by the present invention may further have the following technical features:
in the above technical solution, the method further comprises: the electric heating element is arranged in the water tank to heat the fluid in the water tank.
In this technical scheme, through set up the electric heating member in the water tank, make heat pump water heater can carry out rapid heating through electric heating member to a small amount of water in the water tank, improve heat pump water heater's heating efficiency, specifically, when the user needs a small amount of water, can utilize heating system to carry out the heat transfer to the water of water tank simultaneously, directly add the water in the water tank through electric heating member simultaneously, make heat pump water heater can supply hot water fast, reduce user's latency.
In the above technical solution, the method further comprises: the circulating pipeline, the water tank and the heat storage box body are all arranged on the circulating pipeline, and a circulating water pump is arranged in the circulating pipeline.
In the technical scheme, the water tank and the heat storage box body are arranged on the circulating pipeline through the circulating pipeline, so that cold water can circularly flow in the water tank and the heat storage box body, the circulating pipeline is provided with the circulating water pump, and the circulating flow of the cold water in the water tank and the heat storage box body can be controlled through the circulating water pump. Specifically, when the heat pump water heater heats water in the water tank and water in the pipeline in the heat storage box body simultaneously, because of different heating modes, the water in the water tank and the water in the heat storage box body have temperature differences, and the water with different temperatures can be further mixed through the circulating pipeline, so that the heating efficiency of cold water is improved, hot water is quickly supplied, and the waiting time of a user is reduced.
In the technical scheme, the circulating pipeline is provided with the water inlet and the water outlet, and fluid flows into the circulating pipeline from the water inlet and flows out from the water outlet.
In the technical scheme, a water inlet and a water outlet are arranged on the circulating pipeline, so that cold water flows into the heat pump water heater through the water inlet, and after the cold water is heated into hot water by the heat pump water heater, the hot water can flow out through the water outlet at the same time, and hot water is provided for users.
Specifically, accomplish the water heating in the water tank at heat pump water heater, and phase change material absorbs and accomplishes phase change heat storage, and the heat accumulation box keeps higher temperature to be used for follow-up heating cold water, when user's water consumption is greater than the water yield that the water tank stored, cold water can flow into heat pump water heater through the water inlet, heats through the heat accumulation box of circulation pipeline shell flow through, continuously provides hot water for the user, still can satisfy the user demand of a large amount of water on the basis that reduces the water tank volume.
In the above technical scheme, the distance between the water inlet and the bottom wall of the shell is smaller than the distance between the water outlet and the bottom wall of the shell.
In this technical scheme, the distance of diapire through the water inlet apart from the casing is less than the distance of delivery port apart from the diapire of casing for the position of water inlet is less than the position of delivery port in vertical direction, thereby makes cold water get into from low through the water inlet, heats for hot water back through heat pump water heater, through the delivery port from high discharge, has avoided from this when rivers are very fast, because of gravity factor's reason, cold water is not heated to the temperature that the user needs just discharge from the delivery port, influences the user and uses.
In the above technical solution, the method further comprises: and the second temperature sensor is arranged on the circulating pipeline to detect the temperature of water in the circulating pipeline.
In the technical scheme, the second temperature sensor is arranged on the circulating pipeline, the water temperature in the circulating pipeline can be detected through the second temperature sensor, the temperature detection of a plurality of different positions of the heat pump water heater is realized by combining the first temperature sensor, and the judgment and the control of the use state of the subsequent heat pump water heater are facilitated.
A second aspect of the present invention provides a control method for a heat pump water heater according to any one of the first aspect, including: acquiring a first temperature and a second temperature of a first water level height and a second water level height in a water tank respectively in a heat pump water heater; determining a first temperature threshold corresponding to a set temperature; determining a comparison of the first and second temperatures to a first temperature threshold; determining at least one opening object in the heat pump water heater according to the received mode selection instruction and the comparison relation; and controlling at least one opening object to run.
In the technical scheme, a first temperature sensor with a first height and a first temperature sensor with a second height are respectively arranged at different heights in a water tank of the heat pump water heater, and the first temperature and the second temperature are correspondingly obtained, so that the temperature sensors can obtain the water temperatures at different heights in the water tank, and the problem that when water is continuously fed, the water temperature is not uniform due to incomplete heating in the water tank, and the temperature obtained by the temperature sensors has large errors is avoided; determining a first temperature threshold value corresponding to the set temperature so as to determine a minimum input value for generating a corrective action during automatic control of the heat pump water heater, and determining at least one opening object in the heat pump water heater by comparing the second temperature with the first temperature threshold value and combining the received mode command with the comparison relationship between the second temperature and the first temperature threshold value; and controlling the at least one opening object to operate, so that when the water temperature in the water tank does not meet the temperature of the mode instruction, the at least one opening object is opened to heat the cold water.
Specifically, a first temperature threshold corresponding to a set temperature is determined through setting, when the maximum value of water temperatures in a plurality of water tanks with different heights acquired through a temperature sensor is lower than the first temperature threshold corresponding to the set temperature, at least one opening object is controlled to be opened, the heat pump water heater starts heating, when the maximum value of the water temperatures with different heights in the water tanks is higher than the set temperature, all the objects are controlled to be closed and stop heating, the water temperature is controlled within the first temperature threshold and the set temperature, water temperature control is achieved, meanwhile, through setting the first temperature threshold and a temperature interval of the set temperature, continuous and frequent opening and closing of the heat pump water heater can be avoided, and the purposes of protecting the heat pump water heater and saving energy are achieved.
The heat pump water heater can control one opening object and can also open a plurality of opening objects, and it can be understood that when the heat pump water heater controls a plurality of opening objects to be opened, the heating efficiency of the water heater can be improved, and hot water can be provided for users more quickly.
In the above technical solution, the determining the first temperature threshold corresponding to the set temperature specifically includes: determining a return difference temperature corresponding to a set temperature; and determining the difference value between the set temperature and the return difference temperature as a first temperature threshold value.
In the technical scheme, in an automatic control system of the heat pump water heater, the minimum temperature of the automatic control system initiating the correction action is determined to be a first temperature threshold, when a user selects a certain set temperature, a determined return difference temperature is corresponding to the set temperature, and the first temperature threshold corresponding to the set temperature is the difference between the set temperature and the return difference temperature corresponding to the set temperature, so that the automatic control system of the heat pump water heater generates two critical temperature values when the automatic control system generates the correction action, wherein the minimum value is the first temperature threshold, and the maximum value is the set temperature. The heating is started when the temperature of the heat pump water heater in the water tank is lower than the first temperature threshold value, the water temperature rises, and when the water temperature exceeds the set temperature, the heating is stopped, so that the water temperature in the heat pump water heater is maintained in a range that the temperature is higher than the first temperature threshold value and lower than the set temperature, the continuous hot water supply is ensured, and the user requirements are met.
The return difference temperature can be set and selected according to the specific use environment and the use habit.
In the above technical solution, determining a comparison relationship between the first temperature and the second temperature and the first temperature threshold specifically includes: determining the temperature with the maximum temperature value in the first temperature and the second temperature; and determining the magnitude relation between the temperature with the maximum temperature value and the first temperature threshold value.
In the technical scheme, the maximum value of the first temperature and the second temperature is determined by comparing the first temperature with the second temperature, so that the maximum temperature values of water at different heights in the water tank are obtained, and the size relation between the temperature with the larger temperature value and the first temperature threshold value is further determined.
The maximum value of the first temperature and the maximum value of the second temperature are determined to obtain the maximum values of the water temperatures at different heights in the water tank, so that the phenomenon that when the water tank is heated unevenly, part of the water temperatures exceed the requirements of users and influence the experience of the users is avoided.
In the above technical solution, determining at least one opening object in the heat pump water heater according to the received mode selection instruction and the comparison relationship specifically includes: if the mode corresponding to the mode selection instruction is the normal heating mode, determining that a compressor in the heat pump water heater is an opening object when the temperature with the maximum temperature value is less than a first temperature threshold value; if the mode corresponding to the mode selection instruction is the quick heating mode, determining that a compressor, an electric heating element and a circulating water pump in the heat pump water heater are starting objects when the temperature with the maximum temperature value is less than a first temperature threshold value; and if the mode corresponding to the mode selection instruction is the electric heating mode, determining that an electric heating element and a circulating water pump in the heat pump water heater are starting objects when the temperature with the maximum temperature value is less than a first temperature threshold value.
In the technical scheme, when a user selects a certain mode selection instruction and obtains a comparison relation between the maximum value of the first temperature and the second temperature and a first temperature threshold value, at least one opening object in the heat pump water heater is determined, specifically, when the user selects a normal heating mode instruction and the maximum value of the first temperature and the second temperature is smaller than the first temperature threshold value, the heat pump water heater determines that a compressor is the opening object, the compressor is opened, cold water is heated, and hot water is supplied to the user; when a user selects a quick heating mode instruction, when the maximum value of the first temperature and the second temperature is smaller than a first temperature threshold value, the heat pump water heater determines that the compressor, the electric heating element and the circulating water pump are starting objects, cold water is heated together by starting the compressor and the electric heating element, meanwhile, the water in different areas of the heat pump water heater can be uniformly mixed by starting the circulating water pump, so that the water temperatures of the different areas of the heat pump water heater are more average, the phenomenon that the water temperatures of different parts are too different to influence user experience is avoided, the water temperature can be rapidly improved, and the waiting time of the user is shortened; when a user selects the electric heating mode, when the maximum value of the first temperature and the second temperature is smaller than the first temperature threshold value, the heat pump water heater determines that the electric heating element and the circulating water pump are starting objects, the electric heating element is started to heat cold water, and the circulating water pump is utilized to promote circulating flow of all parts of water of the heat pump water heater, so that the water temperature is more average.
In the above technical solution, when the mode corresponding to the mode selection instruction is the rapid heating mode or the electric heating mode, the method further includes: acquiring a third temperature of the fluid in the circulating pipeline where the circulating water pump is located; judging whether the temperature with the minimum temperature value among the first temperature, the second temperature and the third temperature is greater than a set temperature or not; and controlling the starting object to stop running when the temperature with the minimum value among the first temperature, the second temperature and the third temperature is greater than the set temperature.
In the technical scheme, when a user selects a quick heating mode or an electric heating mode, the third temperature of fluid in a circulating pipeline is obtained through a temperature sensor arranged on the circulating pipeline, so that the water temperature in the heat pump water heater is detected more comprehensively, whether the temperature with the minimum value among the first temperature, the second temperature and the third temperature is greater than a set temperature or not is judged, when the temperature with the minimum value among the first temperature, the second temperature and the third temperature is greater than the set temperature, an opening object is controlled to stop running, the heat pump water heater stops heating, the water temperature in the heat pump water heater is enabled not to exceed a set value, the water demand of the user is met, the heat pump water heater is prevented from continuously working, the water temperature is enabled to be too high, and the use of the user is prevented from being influenced.
In the above technical solution, when the mode corresponding to the mode selection instruction is the normal heating mode, the method further includes: when the temperature with the maximum temperature value in the first temperature and the second temperature is higher than the set temperature, controlling the circulating water pump to be started; acquiring a third temperature of the fluid in the circulating pipeline where the circulating water pump is located; judging whether the temperature with the minimum temperature value among the first temperature, the second temperature and the third temperature is greater than a set temperature or not; and controlling the starting object to stop running when the temperature with the minimum value among the first temperature, the second temperature and the third temperature is greater than the set temperature.
In the technical scheme, when a user selects a normal heating mode, when the temperature with the maximum temperature value of a first temperature at a first temperature and a second temperature is greater than a set temperature, a circulating water pump is controlled to be started to enable water in different areas to circularly flow, so that the water temperatures in different areas in a heat pump water heater are more average, meanwhile, a temperature sensor arranged on a circulating pipeline is used for obtaining a third temperature of fluid in the circulating pipeline so as to more comprehensively detect the water temperature in the heat pump water heater, and judging whether the temperature with the minimum temperature value of the first temperature, the second temperature and the third temperature is greater than the set temperature or not, when the temperature with the minimum temperature value of the first temperature, the second temperature and the third temperature is greater than the set temperature, a compressor is controlled to stop running, the heat pump water heater stops heating, so that the water temperature in the heat pump water heater does not exceed the set value, so as to meet the water demand of the user, the continuous work of the heat pump water heater is avoided, so that the water temperature is overhigh, and the use of a user is influenced.
The temperature value with the minimum temperature value in the first temperature, the second temperature and the third temperature is compared with the set temperature, so that the water temperatures in different areas in the heat pump water heater can reach the set temperature value of a user, and the requirements of the user are met.
A third aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the control method of the second aspect.
In this technical solution, by executing the steps of the operation control method according to any one of the above technical solutions, all beneficial effects of the above technical solutions are achieved, and are not described herein again.
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
FIG. 1 shows a schematic diagram of a heat pump water heater according to one embodiment of the present invention;
FIG. 2 shows a schematic diagram of a heat pump water heater according to one embodiment of the present invention;
FIG. 3 shows a flow diagram of a control method according to an embodiment of the invention;
FIG. 4 shows a flow diagram of a control method according to an embodiment of the invention;
FIG. 5 shows a flow diagram of a control method according to an embodiment of the invention;
FIG. 6 shows a flow diagram of a control method according to an embodiment of the invention;
FIG. 7 shows a flow diagram of a control method according to an embodiment of the invention;
fig. 8 shows a flow diagram of a control method according to an embodiment of the invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
1 shell, 11 compressor, 12 evaporator, 13 water tank heat exchanger, 14 heat accumulation box body, 132 first temperature sensor, 16 electric heating element, 15 circulation pipeline, 152 circulating water pump, 154 water inlet, 156 water outlet and 158 second temperature sensor.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in 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.
As shown in fig. 1 and 2, an embodiment of the present invention provides a heat pump water heater including: a housing 1; the heating system is arranged in the shell 1 and comprises a compressor 11 and an evaporator 12 which are connected through pipelines; the water tank is arranged in the shell 1, and a water tank heat exchanger 13 with two ends respectively connected with the compressor 11 and the evaporator 12 through pipelines is arranged in the water tank; and the heat storage box body 14 is arranged in the shell 1, the heat storage box body 14 is connected with the water tank through a pipeline, a heat storage heat exchanger is arranged in the heat storage box body 14, one end of the heat storage heat exchanger is connected with the water tank heat exchanger 13 through a pipeline, the other end of the heat storage heat exchanger is connected with the compressor 11 or the evaporator 12 through a pipeline, and the water tank is provided with a plurality of first temperature sensors 132 so as to control the opening and closing of the compressor 11 according to the temperatures acquired by the plurality of first temperature sensors 132.
According to the heat pump water heater of the invention, a heating system, a water tank and a heat storage tank body 14 are arranged in a shell 1, the heating system comprises a compressor 11 and an evaporator 12 which are connected through pipelines, the water tank and the heat storage tank body 14 are connected through pipelines, cold water can flow between the water tank and the heat storage tank body 14 through pipelines, a water tank heat exchanger 13 and a heat storage heat exchanger are respectively arranged in the water tank and the heat storage tank body 14, two ends of the water tank heat exchanger 13 are respectively connected with the compressor 11 and the pipeline for evaporating the compressor, one end of the heat storage heat exchanger is connected with the pipeline of the water tank heat exchanger 13, the other end of the heat storage heat exchanger is connected with the compressor 11 or the evaporator 12, specifically, when the heat pump system heats, high-temperature and high-pressure refrigerants discharged by the compressor 11 respectively enter the water tank heat exchanger 13 and the heat storage heat exchanger to respectively exchange heat with phase-change materials in water in the water tank and the heat storage tank body 14, so as to increase the temperature of the water in the water tank, and the heat released by the refrigerant is absorbed and stored by the phase-change material in the heat storage box body 14 to complete phase-change heat storage, the phase-change material after heat storage heats the water in the pipeline passing through the heat storage box body 14, after heating is completed, the refrigerant passes through the evaporator 12 and returns to the compressor 11, so that the heat pump water heater can provide hot water for users in time to meet the water demand of the users, and the refrigerant is absorbed by the phase-change material in the heat storage box body 14 to complete phase-change heat storage after releasing heat through the heat storage box body 14, so as to be used for heating cold water subsequently. It should be noted that, a plurality of first temperature sensors 132 are disposed in the water tank, and the switch of the compressor 11 is controlled according to the temperature acquired by any one of the first temperature sensors 132, specifically, the temperature acquired by the first temperature sensor 132 is compared with the temperature set by the user, when the temperature acquired by the first temperature sensor 132 is greater than the temperature set by the user, the compressor 11 is controlled to be turned off, the heating is stopped, and when the temperature acquired by the first temperature sensor 132 is less than the temperature set by the user, the compressor 11 is controlled to be turned on, the heating is turned on, so as to realize the heating control of the water tank and the heat storage box 14, which is convenient for the user.
Here, preferably, the temperature compared with the temperature set by the user may be the smallest one of the temperatures detected by the plurality of first temperature sensors 132.
Understandably, the heat pump water heater can effectively reduce the volume and weight of the heat pump water heater by applying the phase-change material heat storage technology, in addition, the water tank heat exchanger 13 and the heat storage heat exchanger are connected between the compressor 11 and the evaporator 12 through pipelines, on one hand, the phase-change heat storage technology is utilized, under the condition of the same volume as that of the traditional heat pump water heater, more hot water can be provided, on the other hand, the phase-change heat storage box body 14 for completing heat storage has the heat preservation effect, the water flowing through the heat storage box body 14 can be continuously heated in the water using process of a user, the sudden drop of the water temperature in the water tank of the common heat pump water heater can be effectively avoided, and the water using experience of the user is influenced.
In the above embodiment, the method further includes: an electric heating element 16 is provided in the water tank to heat the fluid in the water tank.
In this embodiment, the electric heating element 16 is disposed in the water tank, so that the heat pump water heater can rapidly heat a small amount of water in the water tank through the electric heating element 16, thereby improving the heating efficiency of the heat pump water heater, specifically, when a user needs a small amount of water, the heating system can be simultaneously utilized to exchange heat for the water in the water tank, and meanwhile, the water in the water tank is directly heated by the electric heating element 16, so that the heat pump water heater can rapidly supply hot water, thereby reducing the waiting time of the user.
In the above embodiment, the method further includes: the circulation pipeline 15, the water tank and the heat accumulation tank body 14 are all arranged on the circulation pipeline 15, and a circulation water pump 152 is arranged in the circulation pipeline 15.
In this embodiment, the circulation line 15 is provided, and the water tank and the heat storage tank 14 are both provided on the circulation line 15, so that the cold water can circulate in the water tank and the heat storage tank 14, and the circulation pump 152 is provided on the circulation line 15, and the circulation flow of the cold water in the water tank and the heat storage tank 14 can be controlled by the circulation pump 152. Specifically, when the heat pump water heater simultaneously heats water in the water tank and water in the pipe line in the heat storage tank 14, because of different heating methods, the water in the water tank and the water in the heat storage tank 14 have temperature differences, and the water at different temperatures can be further mixed through the circulation pipe 15, so that the heating efficiency of cold water is improved, hot water is quickly supplied, and the waiting time of users is reduced.
In the above embodiment, the circulation pipeline 15 is provided with the water inlet 154 and the water outlet 156, and the fluid flows into the circulation pipeline 15 through the water inlet 154 and flows out through the water outlet 156.
In this embodiment, a water inlet 154 and a water outlet 156 are provided on the circulation pipeline 15, so that cold water flows into the heat pump water heater through the water inlet 154, and after being heated to hot water by the heat pump water heater, the hot water can flow out through the water outlet 156 at the same time, so as to provide hot water for users.
Specifically, accomplish the water heating in the water tank at the heat pump water heater, and phase change material absorbs and accomplishes phase change heat accumulation, and heat accumulation box 14 keeps higher temperature to be used for follow-up heating cold water, when user's water consumption is greater than the water yield that the water tank stored, cold water can flow into the heat pump water heater through water inlet 154, heats through heat accumulation box 14 of circulation pipeline 15 shell flow-through, continuously provides hot water for the user, still can satisfy the user demand of a large amount of water on the basis of reducing the water tank volume.
In the above embodiment, the distance from the water inlet 154 to the bottom wall of the housing 1 is smaller than the distance from the water outlet 156 to the bottom wall of the housing 1.
In this embodiment, the distance from the water inlet 154 to the bottom wall of the housing 1 is smaller than the distance from the water outlet 156 to the bottom wall of the housing 1, so that the position of the water inlet 154 is lower than the position of the water outlet 156 in the vertical direction, and therefore, cold water enters from a lower position through the water inlet 154, and is heated into hot water through the heat pump water heater, and then is discharged from a higher position through the water outlet 156, thereby avoiding that when the water flow is fast, the cold water is discharged from the water outlet 156 without being heated to the temperature required by the user due to gravity, and affecting the use of the user.
In one particular embodiment, as shown in fig. 1, the thermal storage tank 14 is disposed at the bottom of the housing 1, the water tank is disposed above the thermal storage tank 14, the water inlet 154 is disposed at a side wall of the tank near the bottom of the housing 1, and is connected to the thermal storage tank body 14, the water outlet 156 is disposed above the opposite water inlet 154, the side wall of the shell body 1 on the same side with the water outlet 156 is connected with the water tank, the heat accumulation box body 14 is connected with the water tank through a pipeline, in operation, cold water enters through the water inlet 154, flows into the thermal storage tank 14, flows out through the water outlet 156, by locating the water inlet 154 relatively close to the bottom of the housing 1, the cold water is first heated by the thermal storage tank 14 and then enters the water tank, avoiding the need to, due to gravity, the cold water is heated to the temperature required by the customer and then discharged from the water outlet 156, resulting in a poor user experience.
In another specific embodiment, as shown in fig. 2, the water tank is disposed at the bottom of the housing 1, the heat storage tank 14 is disposed above the water tank, the water inlet 154 is disposed on the side wall of the tank near the bottom of the housing 1 and connected to the water tank, the water outlet 156 is disposed above the water inlet 154 and on the same side of the side wall of the housing 1 as the water outlet 156 and connected to the heat storage tank 14, the heat storage tank 14 is connected to the water tank through a pipeline, when the heat pump water heater stops operating, cold water enters from the water inlet 154, flows into the water tank, flows through the heat storage tank 14, flows out from the water outlet 156, and by disposing the water inlet 154 relatively near the bottom of the housing 1, the cold water is heated by the water tank and then enters into the heat storage tank 14, when the heat pump water heater stops operating, the phase change material in the heat storage tank 14 stores energy and has a high temperature, so that when the water passes through the heat storage tank 14, by reheating, play the effect of buffering, can effectively avoid traditional water tank to descend suddenly at water in-process temperature, experience that the user is not good when using water.
In the above embodiment, the method further includes: and a second temperature sensor 158 is provided on the circulation line 15 to detect the temperature of the water in the circulation line 15.
In this embodiment, the second temperature sensor 158 is disposed on the circulation pipeline 15, the temperature of the water in the circulation pipeline 15 can be detected by the second temperature sensor 158, and the temperature detection of multiple different positions of the heat pump water heater is realized by combining with the first temperature sensor 132, which is beneficial to the judgment and control of the subsequent use state of the heat pump water heater.
As shown in fig. 3: the control method of the heat pump water heater according to one embodiment of the invention is used for the heat pump water heater in any one of the above embodiments, and comprises the following steps: step S102, acquiring a first temperature and a second temperature of a heat pump water heater respectively positioned at a first water level height and a second water level height in a water tank; step S104, determining a first temperature threshold corresponding to the set temperature; step S106, determining a comparison relation between the first temperature and the second temperature and a first temperature threshold; step S108, determining at least one opening object in the heat pump water heater according to the received mode selection instruction and the comparison relation; step S110, controlling at least one opening object to operate, specifically including the following steps:
specifically, a first temperature sensor with a first height and a first temperature sensor with a second height are respectively arranged at different heights in a water tank of the heat pump water heater, and the first temperature and the second temperature are correspondingly obtained, so that the temperature sensors can obtain the water temperatures at different heights in the water tank, and the situation that when water is continuously fed, the temperature obtained by the temperature sensors has large errors due to the fact that the water temperature in the water tank is uneven is avoided; the method comprises the steps of determining a first temperature threshold corresponding to a set temperature, determining at least one starting object in the heat pump water heater by comparing a second temperature with the first temperature threshold and combining a comparison relation between a received mode command and the second temperature with the first temperature threshold, namely determining at least a compressor or an electric heating element, and then controlling at least the compressor or the electric heating element to be started to heat cold water.
The first temperature threshold corresponding to the set temperature is determined through setting, when the maximum value of the water temperatures at different heights in the water tank is lower than the first temperature threshold corresponding to the set temperature, at least one opening object is controlled, the heat pump water heater is started to heat, when the maximum value of the water temperatures at different heights in the water tank is higher than the set temperature, all the objects are controlled to be closed and the heating is stopped, the water temperature is controlled to be larger than the first temperature threshold and smaller than the set temperature range, the water temperature control is achieved, therefore, when the water temperature in the water tank is larger than the first temperature threshold and smaller than the set temperature range, the heat pump water heater is in a heating stopping state, the heat pump water heater is prevented from being continuously opened and closed for many times, and the purposes of protecting the heat pump water heater and saving energy are achieved.
The heat pump water heater can control one opening object and also can open a plurality of opening objects, when the heat pump water heater controls the opening of the plurality of opening objects, the heating efficiency of the water heater can be improved, and hot water can be provided for users more quickly.
As shown in fig. 4, the method for controlling a heat pump water heater according to an embodiment of the present invention specifically includes the following steps:
step S202, acquiring a first temperature and a second temperature of a heat pump water heater respectively positioned at a first water level height and a second water level height in a water tank;
step S204, determining a return difference temperature corresponding to the set temperature;
step S206, determining a first temperature threshold corresponding to the set temperature;
step S208, determining the comparison relationship between the first temperature and the second temperature and the first temperature threshold;
step S210, determining at least one opening object in the heat pump water heater according to the received mode selection instruction and the comparison relation;
and step S212, controlling at least one opening object to operate.
Specifically, in the automatic control system of the heat pump water heater, the minimum temperature of initiating the correction action is determined to be a first temperature threshold, when a user selects a certain determined set temperature, a determined return difference temperature is corresponding to the set temperature, the first temperature threshold corresponding to the set temperature is the difference between the set temperature and the return difference temperature corresponding to the set temperature, so that the automatic control system of the heat pump water heater generates two critical temperature values when the correction action is performed, the minimum value is the first temperature threshold, the maximum value is the set temperature, the heat pump water heater starts heating when the temperature in the water tank is lower than the first temperature threshold, the water temperature rises, when the water temperature exceeds the set temperature, the heating is stopped, the water temperature in the heat pump water heater is maintained in a range larger than the first temperature threshold and smaller than the set temperature, the water temperature control is realized, and the continuous supply of hot water is ensured, meanwhile, the continuous and frequent opening and closing of the heat pump water heater can be avoided by setting the first temperature threshold and the temperature interval of the set temperature, and the purposes of protecting the heat pump water heater and saving energy are achieved.
As shown in fig. 5, the method for controlling a heat pump water heater according to another embodiment of the present invention specifically includes the following steps:
step S302, acquiring a first temperature and a second temperature of a heat pump water heater respectively positioned at a first water level height and a second water level height in a water tank;
step S304, determining a return difference temperature corresponding to the set temperature;
step S306, determining a first temperature threshold corresponding to the set temperature;
step S308, determining the temperature with the maximum temperature value in the first temperature and the second temperature;
step S310, determining the size relation between the temperature with the maximum temperature value and a first temperature threshold value;
step S312, determining at least one opening object in the heat pump water heater according to the received mode selection instruction and the comparison relation;
and step S314, controlling at least one opening object to operate.
Specifically, the maximum value of the first temperature and the maximum value of the second temperature are determined by comparing the first temperature with the second temperature, so that the maximum temperature values of the water at different heights in the water tank are obtained, the relationship between the temperature with the larger temperature value and the first temperature threshold value is further determined, the starting object is selectively determined according to the comparison relationship and in combination with a mode selection instruction received by the heat pump water heater, the determined starting object is enabled to operate, the automatic control of the heat pump water heater is realized, and the use of a user is facilitated.
The maximum value of the first temperature and the maximum value of the second temperature are determined to obtain the maximum values of the water temperatures of different heights in the water tank, and the phenomenon that when the water temperature in the water tank is uneven, part of the water temperature exceeds the user requirement and influences the user experience is avoided.
As shown in fig. 6, the method for controlling a heat pump water heater according to another embodiment of the present invention specifically includes the following steps:
step S402, acquiring a first temperature and a second temperature of a first water level and a second water level in a water tank of the heat pump water heater respectively;
step S404, determining a return difference temperature corresponding to the set temperature;
step S406, determining a first temperature threshold corresponding to the set temperature;
step S408, determining the temperature with the maximum temperature value in the first temperature and the second temperature;
step S410, determining whether the temperature with the maximum temperature value is smaller than a first temperature threshold value, if not, executing S412, S414 or S416, otherwise, ending;
step S412, determining a compressor in the heat pump water heater as an opening object in a normal heating mode;
step S414, determining a compressor, an electric heating element and a circulating water pump in the heat pump water heater as starting objects in the quick heating mode;
step S416, determining an electric heating element and a circulating water pump in the heat pump water heater as starting objects in an electric heating mode;
step S418, controlling the compressor to be started;
step S420, controlling the compressor, the electric heating element and the circulating water pump to be started;
and step S422, controlling the electric heating element and the circulating water pump to be started.
Specifically, when a user selects a certain mode selection instruction and the acquired comparison relation between the maximum value of the first temperature and the second temperature and the first temperature threshold value, at least one opening object in the heat pump water heater is determined, specifically, when the user selects a normal heating mode instruction and the maximum value of the first temperature and the second temperature is smaller than the minimum value of the first temperature threshold value, the heat pump water heater determines that the compressor is the opening object, the compressor is opened, cold water is heated, and hot water is supplied to the user. When a user selects a quick heating mode instruction, when the maximum value of the first temperature and the second temperature is smaller than a first temperature threshold value, the heat pump water heater determines that the compressor, the electric heating element and the circulating water pump are started objects, the compressor and the electric heating element are started to heat cold water together by starting the compressor, the electric heating element and the circulating water pump, the water temperature can be rapidly increased, the waiting time of the user is shortened, the circulating water pump is started, water in all parts of the heat pump water heater flows in a circulating mode, and the water temperatures in different areas are more uniform. When a user selects the electric heating mode, when the maximum value of the first temperature and the second temperature is smaller than the first temperature threshold value, the heat pump water heater determines that the electric heating element and the circulating water pump are starting objects, the electric heating element works to heat cold water together by starting the electric heating element and the circulating water pump, the water temperature is improved, and the circulating water pump is started, so that water in each part of the heat pump water heater flows circularly, and the water temperatures in different areas are more uniform.
As shown in fig. 7, the method for controlling a heat pump water heater according to still another embodiment of the present invention specifically includes the following steps:
step S502, acquiring a first temperature and a second temperature of a heat pump water heater respectively positioned at a first water level height and a second water level height in a water tank;
step S504, determining a return difference temperature corresponding to the set temperature;
step S506, determining a first temperature threshold corresponding to the set temperature;
step S508, determining the temperature with the maximum temperature value in the first temperature and the second temperature;
step S510, determining whether the temperature with the maximum temperature value is smaller than a first temperature threshold, if not, performing S512, otherwise, performing S516;
step S512, determining and controlling a compressor, an electric heating element and a circulating water pump in the heat pump water heater as starting objects in the quick heating mode;
step S514, controlling a compressor, an electric heating element and a circulating water pump in the heat pump water heater to be started;
step S516, acquiring a third temperature of the fluid in the circulating pipeline where the circulating water pump is located;
step S518, determining whether the temperature with the minimum temperature value among the first temperature, the second temperature, and the third temperature is greater than a set temperature, if not, performing step S514, otherwise, performing step S520;
and step S520, controlling the compressor, the electric heating element and the circulating water pump in the heat pump water heater to be closed.
Specifically, when a user selects a quick heating mode, when the temperature with the maximum temperature value is determined to be less than a first temperature threshold value, the heat pump water heater simultaneously starts the compressor and the electric heating element to quickly heat water in the heat pump water heater, and starts the circulating water pump to promote water circulation flow in different areas in the heat pump water heater, so that water temperatures in different areas are more uniform, meanwhile, a third temperature is obtained through a second temperature sensor arranged on a circulating pipeline, the minimum value of the first temperature, the second temperature and the third temperature is determined, when the minimum value of the first temperature, the second temperature and the third temperature is greater than a set temperature, the heat pump water heater controls the compressor, the electric heating element and the circulating water pump to be closed to stop heating, and when the minimum value of the first temperature, the second temperature and the third temperature is still less than the set temperature, the compressor and the electric heating element are continuously controlled to be opened, and heating cold water, and simultaneously starting the circulating water pump to enable water in the heat pump water heater to circularly flow through the circulating pipeline.
As shown in fig. 8, the method for controlling a heat pump water heater according to still another embodiment of the present invention specifically includes the following steps:
step S602, acquiring a first temperature and a second temperature of a heat pump water heater respectively positioned at a first water level height and a second water level height in a water tank;
step S604, determining a return difference temperature corresponding to the set temperature;
step S606, determining a first temperature threshold corresponding to the set temperature;
step S608, determining a temperature having a maximum temperature value among the first temperature and the second temperature;
step S610, determining whether the temperature with the maximum temperature value is smaller than a first temperature threshold, if not, executing S616, otherwise, executing S612;
step S612, determining a compressor in the heat pump water heater as an opening object in a normal heating mode;
step S614, controlling a compressor in the heat pump water heater to be started;
step S616, determining whether the temperature with the maximum temperature value is greater than a set temperature;
step 618, controlling the circulating water pump to be started;
step S620, acquiring a third temperature of the fluid in the circulating pipeline where the circulating water pump is located;
step S622, determining whether the temperature with the minimum temperature value among the first temperature, the second temperature, and the third temperature is greater than a set temperature, if not, performing step S618, otherwise, performing step S624;
and step S624, controlling the compressor and the circulating water pump to be closed.
Specifically, in a normal heating mode, when the maximum value of a first temperature and a second temperature is smaller than the minimum value of a first temperature threshold value, the heat pump water heater determines that a compressor is an opening object, the compressor is opened to heat cold water, the water temperature in a water tank is increased at the moment, when the maximum value of the first temperature and the second temperature is larger than a set temperature, the heat pump water heater controls a circulating water pump to be opened, so that water in the water tank, a circulating pipeline and a pipeline connecting a heat accumulation tank and the water tank in the heat pump water heater starts to circularly flow, water in different areas is fully mixed, the water temperature is more average, at the moment, a second temperature sensor arranged on the circulating pipeline is used for acquiring a third temperature, whether the temperature with the minimum value among the first temperature, the second temperature and the third temperature is larger than the set temperature or not is judged, and when the temperature with the minimum value among the first temperature, the second temperature and the third temperature is larger than the set temperature, the compressor and the circulating water pump are closed, heating is stopped, and the situation that the water temperature in the heat pump water heater is too high and the use of a user is influenced is avoided.
The temperature with the minimum temperature value in the first temperature, the second temperature and the third temperature is selected to be compared with the set temperature, so that the water temperatures in different areas in the heat pump water heater can meet the requirements of users, and the heat pump water heater is convenient for the users to use.
Yet another embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the control method of any of the above embodiments.
In this embodiment, by performing the steps of the operation control method of any one of the embodiments, all the beneficial effects of the embodiments are achieved, and are not described herein again.
In a specific embodiment of the present invention, the heat pump water heater is divided into three parts, namely, a heat pump system (i.e., a heating system), a water tank, and a heat storage tank, wherein the heat pump system includes a compressor, an evaporator, a throttle member, a fan, and a pipeline for connection, a refrigerant (i.e., a refrigerant) circulates in the pipeline of the heat pump system, and a water tank heat exchanger and a heat storage heat exchanger connected between the compressor and the evaporator are respectively disposed in the water tank and the heat storage tank, and it can be understood that the water tank heat exchanger and the heat storage heat exchanger are connected in parallel, and similarly, the refrigerant also flows in the water tank heat exchanger and the heat storage heat exchanger. In addition, still be equipped with waterway system, waterway system's pipeline is the circulating line promptly, intercommunication water tank and heat accumulation box, still is equipped with circulating water pump and water inlet and delivery port simultaneously in the circulating line, can realize the replenishment of water tank normal water through the water inlet on the one hand, realizes the use of user's water through the delivery port, and on the other hand, through setting up circulating water pump can also flow in the circulating line with drive water, mixes the temperature in water tank and the heat accumulation box.
In addition, two temperature sensors are arranged on the water tank, and a temperature sensor is also arranged on the circulating pipeline, so that the target temperature and the corresponding return difference temperature are preset.
If the user needs normal heating, in a standby state, judging whether the maximum value of the temperatures detected by the two temperature sensors on the water tank is smaller than the difference between a target temperature and a return difference temperature, for example, the target temperature is 40 ℃ and the return difference temperature is 5 ℃, starting a heat pump, namely a compressor, when the maximum value of the temperatures detected by the two temperature sensors is smaller than 35 ℃, starting a heating system to simultaneously heat the water tank and a heat storage tank body, judging whether the minimum value of the temperatures detected by the two temperature sensors on the water tank is larger than 40 ℃ after heating for a period of time, if so, indicating that the heating is primarily completed, controlling a circulating water pump to be started, enabling water to circulate in a water channel, simultaneously judging whether the minimum value of the temperatures detected by the three temperature sensors is also larger than 40 ℃, if so, considering that the water is completely heated, and meeting the use requirements of the user, therefore, the compressor is controlled to stop and is not heated any more.
If a user selects a quick heating mode, the heat pump, the circulating water pump and the electric heating element are directly and simultaneously started, a plurality of heating modes act together, in a standby state, whether the maximum value of the temperatures detected by the two temperature sensors on the water tank is smaller than the difference between a target temperature and a return difference temperature is judged, for example, the target temperature is 40 ℃, the return difference temperature is 5 ℃, when the maximum value of the temperatures detected by the two temperature sensors is smaller than 35 ℃, the heat pump, the circulating water pump and the electric heating element are started, after heating for a period of time, whether the minimum value of the temperatures detected by the three temperature sensors is larger than 40 ℃ is judged, if yes, the heating is considered to be thorough, the use requirements of the user can be met, the compressor is controlled to stop, and the heating is not performed.
If a user selects an electric heating mode, at the moment, in a standby state, if the ambient temperature is less than a set environment temperature threshold, a circulating water pump and an electric heating element are started to perform heating and mixing circulation, after heating for a period of time, whether the minimum value of the temperatures detected by two temperature sensors on a water tank is greater than 40 ℃ is judged, if the minimum value of the temperatures detected by the two temperature sensors on the water tank is greater than 40 ℃, the heating is considered to be thorough, and the use requirement of the user can be met, so that the compressor is controlled to stop and not to heat any more, and in the process of stopping heating, if the maximum value of the temperatures detected by the two temperature sensors on the water tank is smaller than the difference between a target temperature and a return difference temperature, for example, the target temperature is 40 ℃, the return difference temperature is 5 ℃, the heat pump is started when the maximum value of the temperatures detected by the two temperature sensors is smaller than 35 ℃, so as to perform circulation.
The embodiment of the invention is explained in detail by combining the attached drawings, and the heat pump water heater and the control method provided by the invention can effectively reduce the volume of the heat pump water heater, play an energy-saving effect and avoid sudden drop of the water temperature of the traditional water tank in the using process.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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 (11)

1. A heat pump water heater, comprising:
a housing;
the heating system is arranged in the shell and comprises a compressor and an evaporator which are connected through pipelines;
the water tank is arranged in the shell, and a water tank heat exchanger with two ends respectively connected with the compressor and the evaporator pipeline is arranged in the water tank;
a heat storage box body arranged in the shell, the heat storage box body is connected with the water tank through a pipeline, a heat storage heat exchanger is arranged in the heat storage box body, one end of the heat storage heat exchanger is connected with the water tank heat exchanger through a pipeline, the other end of the heat storage heat exchanger is connected with the compressor or the evaporator through a pipeline,
the water tank is provided with a plurality of first temperature sensors so as to control the opening and closing of the compressor according to the temperatures acquired by the first temperature sensors;
the water tank and the heat storage box body are arranged on the circulating pipeline;
a water inlet and a water outlet are arranged on the circulating pipeline, and fluid flows into the circulating pipeline from the water inlet and flows out from the water outlet;
the water tank set up in the bottom of casing, the heat accumulation box set up in the water tank top, the water inlet set up in the box is close to the lateral wall of casing bottom, and connect in on the water tank, the delivery port sets up relatively the water inlet top, and with the heat accumulation box is connected.
2. The heat pump water heater of claim 1, further comprising:
and the electric heating element is arranged in the water tank to heat the fluid in the water tank.
3. The heat pump water heater of claim 1,
and a circulating water pump is arranged in the circulating pipeline.
4. The heat pump water heater of claim 1, wherein the water inlet is a distance from the bottom wall of the housing that is less than a distance of the water outlet from the bottom wall of the housing.
5. The heat pump water heater of claim 3, further comprising:
and the second temperature sensor is arranged on the circulating pipeline so as to detect the water temperature in the circulating pipeline.
6. A control method is used for the heat pump water heater as claimed in any one of claims 1 to 5, wherein a circulating water pump is arranged in the circulating pipeline; the control method comprises the following steps:
acquiring a first temperature and a second temperature of a first water level height and a second water level height in a water tank respectively in the heat pump water heater;
determining a first temperature threshold corresponding to a set temperature;
determining a comparison of the first and second temperatures to the first temperature threshold;
determining at least one opening object in the heat pump water heater according to the received mode selection instruction and the comparison relation;
controlling the at least one opening object to run;
when the mode corresponding to the mode selection command is a normal heating mode, the method further comprises the following steps:
when the temperature with the maximum temperature value in the first temperature and the second temperature is higher than the set temperature, controlling the circulating water pump to be started;
acquiring a third temperature of the fluid in the circulating pipeline where the circulating water pump is located;
judging whether the temperature with the minimum value among the first temperature, the second temperature and the third temperature is greater than a set temperature or not;
and controlling the starting object to stop running when the temperature with the minimum temperature value among the first temperature, the second temperature and the third temperature is greater than a set temperature.
7. The control method according to claim 6, wherein the determining a first temperature threshold corresponding to a set temperature specifically comprises:
determining a return difference temperature corresponding to the set temperature;
and determining the difference value between the set temperature and the return difference temperature as the first temperature threshold value.
8. The control method according to claim 6, wherein the determining of the comparison relationship between the first temperature and the second temperature and the first temperature threshold specifically comprises:
determining a temperature at which a temperature value is maximum between the first temperature and the second temperature;
and determining the magnitude relation between the temperature with the maximum temperature value and the first temperature threshold value.
9. The control method according to claim 8, wherein the heat pump water heater includes: an electric heating member provided in the water tank to heat the fluid in the water tank; the determining at least one opening object in the heat pump water heater according to the received mode selection instruction and the comparison relationship specifically includes:
if the mode corresponding to the mode selection instruction is a normal heating mode, determining that a compressor in the heat pump water heater is the starting object when the temperature with the maximum temperature value is smaller than the first temperature threshold value;
if the mode corresponding to the mode selection instruction is a quick heating mode, determining that a compressor, an electric heating element and a circulating water pump in the heat pump water heater are the starting objects when the temperature with the maximum temperature value is less than the first temperature threshold value;
if the mode corresponding to the mode selection instruction is the electric heating mode, determining that the electric heating element and the circulating water pump in the heat pump water heater are the starting objects when the temperature with the maximum temperature value is smaller than the first temperature threshold value.
10. The control method according to claim 9, when the mode corresponding to the mode selection command is a quick heating mode or an electric heating mode, further comprising:
acquiring a third temperature of the fluid in the circulating pipeline where the circulating water pump is located;
judging whether the temperature with the minimum value among the first temperature, the second temperature and the third temperature is greater than a set temperature or not;
and controlling the starting object to stop running when the temperature with the minimum temperature value among the first temperature, the second temperature and the third temperature is greater than a set temperature.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the control method according to any one of claims 6 to 10.
CN201910420197.7A 2019-05-20 2019-05-20 Heat pump water heater, control method, and computer-readable storage medium Active CN110131889B (en)

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