CN112066551A - Heat pump water heater and control method thereof - Google Patents
Heat pump water heater and control method thereof Download PDFInfo
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- CN112066551A CN112066551A CN202010930657.3A CN202010930657A CN112066551A CN 112066551 A CN112066551 A CN 112066551A CN 202010930657 A CN202010930657 A CN 202010930657A CN 112066551 A CN112066551 A CN 112066551A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 309
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 210000000476 body water Anatomy 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 description 24
- 239000003507 refrigerant Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000008236 heating water Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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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
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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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
- 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
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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
- 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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- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- 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
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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)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a heat pump water heater and a control method thereof, wherein the water heater comprises a heat pump part, a water storage tank part and a control part, wherein the control part comprises a main controller; the heat pump part comprises a compressor, a four-way reversing valve and an evaporator which are connected in sequence, wherein a fan is arranged on one side of the evaporator, and the compressor, the four-way reversing valve, the evaporator and the fan are all electrically connected with a main controller; the water storage tank part comprises a water tank body, a water inlet is formed at the lower end of one side of the water tank body, a water outlet is formed at the upper end of one side of the water tank body, and a temperature detection part is arranged at the water outlet; the upper end in the water tank body is provided with a first heat exchanger, the first connecting end of the first heat exchanger is communicated with the four-way reversing valve, and the second connecting end of the first heat exchanger is communicated with the evaporator; a first electromagnetic valve is arranged between the first connecting end and the second connecting end of the first heat exchanger; the first electromagnetic valve and the temperature sensor are electrically connected with the main controller. The heat exchanger is additionally arranged at the upper part of the water tank of the heat pump water heater, so that the water temperature can be improved.
Description
Technical Field
The invention relates to a water heater, in particular to a heat pump water heater and a control method thereof.
Background
The existing water storage type heat pump water heater can heat water in a water storage tank in the working process, and the currently common water tank heating modes comprise static heating and circulating water heating. The static heating mode is that a heat exchanger arranged at the lower part of the water tank is used for statically exchanging heat between water in the water tank and a high-temperature refrigerant in the heat exchanger, and cold water and hot water in the water tank exchange heat in a natural convection mode, so that the aim of heating the water in the whole water storage tank is fulfilled. The heating mode has low heating efficiency and low heating speed. The water circulation type heating mode is that low-temperature water at the lower part of the water storage tank is circulated to a heat exchanger outside the water tank by a water pump to exchange heat with a high-temperature refrigerant, high-temperature water after heat exchange is circulated to the upper part of the water tank by the water pump, and the water exchanges heat with the refrigerant in a dynamic mode. The heat exchange effect of the mode is good, the water tank uniformly heats the whole water tank, and the heating input is still slow.
The above-mentioned hot water heating methods are two common heating methods at present, and are characterized in that the water heater needs to heat the water in the whole water tank in the heating process, so that the whole heating process is slow, and the water in the water tank cannot be quickly heated to a usable state.
In order to achieve the purpose of rapidly discharging hot water, a resistance-type heater is added on the upper portion of a water storage tank, and water near a hot water outlet on the upper portion of the water storage tank is rapidly heated to a usable state by electric energy.
Disclosure of Invention
In order to solve the above technical problems, a first object of the present invention is to provide a heat pump water heater, in which a heat exchanger is additionally disposed at an upper portion of a water tank of the heat pump water heater, so as to achieve a purpose of rapidly raising a water temperature.
The second purpose of the invention is to provide a control method of the heat pump water heater, which is suitable for the heat pump water heater.
In one aspect of the present invention, a heat pump water heater is provided, which comprises a heat pump part, a water storage tank part and a control part, specifically:
the control part comprises a main controller;
the heat pump part comprises a compressor, a four-way reversing valve and an evaporator which are connected in sequence, wherein a fan is arranged on one side of the evaporator, and the compressor, the four-way reversing valve, the evaporator and the fan are all electrically connected with the main controller;
the water storage tank part comprises a water tank body, a water inlet is formed at the lower end of one side of the water tank body, a water outlet is formed at the upper end of one side of the water tank body, and a temperature detection part is arranged at the water outlet; a first heat exchanger is arranged at the position, lower than the water outlet, of the upper end in the water tank body, a first connecting end of the first heat exchanger is communicated with the four-way reversing valve, and a second connecting end of the first heat exchanger is communicated with the evaporator; the first connecting end and the second connecting end of the first heat exchanger are communicated through a first pipeline, and a first electromagnetic valve for opening and closing the first pipeline is arranged on the pipeline;
the first electromagnetic valve and the temperature sensor are electrically connected with the main controller.
Preferably, a second heat exchanger connected in series between the first heat exchanger and the evaporator is further arranged in the water tank body, a first connecting end and a second connecting end of the second heat exchanger are communicated through a second pipeline, and a second electromagnetic valve for opening and closing the second pipeline is arranged on the pipeline.
Preferably, the water storage tank part further comprises a third heat exchanger and a circulating water pump connected with the third heat exchanger, and the third heat exchanger is arranged outside the water tank body;
the upper end of the other side of the water tank body is provided with a circulating water inlet, the lower end of the other side of the water tank body is provided with a circulating water outlet, one end of the circulating water pump is connected with the circulating water outlet, the other end of the circulating water pump is connected with a first connecting end of a third heat exchanger, and the third heat exchanger transfers circulating water to the circulating water inlet through a second connecting end after exchanging heat with the circulating water;
and the third connecting end of the third heat exchanger is communicated with the second connecting end of the first heat exchanger, and the fourth connecting end of the third heat exchanger is communicated with the evaporator.
Preferably, a throttle member is further provided in a passage through which the first heat exchanger communicates with the evaporator.
In another aspect of the present invention, a method for controlling a heat pump water heater is provided, the method comprising the steps of:
1) responding to the water demand, and detecting the water outlet temperature of the water tank body;
2) judging the current water outlet temperature T2Whether or not it is lower than the preset temperature T1If yes, executing step 3); if not, executing step 4);
3) the heat pump part is started, the first electromagnetic valve is closed simultaneously, water on the upper portion of the water tank body is rapidly heated, when the temperature of the water outlet rises to the preset temperature, water can be discharged through prompting, and the water is continuously heated until the temperature of the water outlet reaches the preset temperature T1；
4) Determining the sustainable water outlet time t of the current water outlet temperature2If the water outlet time t can be continued2Is less than the preset use time t1Then the heat pump part is started, and the first electromagnetic valve is closed at the same time to quickly heat the water on the upper part of the water tank body until t2≥ t1Or the water demand is withdrawn.
Preferably, the water outlet time t can be continued2The basis for the determination of (1) is: according to the current water outlet opening state of the water tank main body, combining the current water outlet temperature T2。
As a preferenceThe basis for judging the water demand cancellation is as follows: time t of continuous non-water outlet of water tank body water outlet3≥10min。
Compared with the prior art, the invention has the beneficial effects that:
the water tank is additionally provided with the heat exchanger, in the process of heating hot water, the temperature of water stored in the water storage tank is lower and lower from top to bottom due to the fact that the density of the hot water is lower and the density of the cold water is higher, the third heat exchanger arranged on the upper portion of the water tank is used for heating the hot water with relatively higher temperature on the upper portion of the water tank, meanwhile, the temperature of the water outlet on the upper portion of the water tank is detected in real time, and when the temperature of the upper portion of the water tank is heated to the required temperature, water can be discharged, therefore, when the temperature of the water tank is lower, the hot water on the upper portion of the water tank can be rapidly heated (using a refrigerant) in a targeted mode, water near the hot water outlet of the water.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic structural diagram of a static heating type heat pump water heater according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of the control section according to the present invention shown in FIG. 1;
FIG. 3 is a schematic diagram of the control logic of the heat pump water heater of the present invention as referenced in FIG. 1;
FIG. 4 is a schematic structural diagram of a circulating water type heating heat pump water heater according to an embodiment of the present invention;
fig. 5 is a schematic control logic diagram of the heat pump water heater according to the invention and fig. 4.
Detailed Description
The invention is further described with reference to the following figures and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiment provides a heat pump water heater, including heat pump part, storage water tank part and control section, specifically:
the control part comprises a main controller;
the heat pump part comprises a compressor, a four-way reversing valve and an evaporator which are connected in sequence, wherein a fan is arranged on one side of the evaporator, and the compressor, the four-way reversing valve, the evaporator and the fan are all electrically connected with the main controller;
the water storage tank part comprises a water tank body, a water inlet is formed at the lower end of one side of the water tank body, a water outlet is formed at the upper end of one side of the water tank body, and a temperature detection part is arranged at the water outlet; a first heat exchanger is arranged at the position, lower than the water outlet, of the upper end in the water tank body, a first connecting end of the first heat exchanger is communicated with the four-way reversing valve, and a second connecting end of the first heat exchanger is communicated with the evaporator; the first connecting end and the second connecting end of the first heat exchanger are communicated through a first pipeline, and a first electromagnetic valve for opening and closing the first pipeline is arranged on the pipeline;
the first electromagnetic valve and the temperature sensor are electrically connected with the main controller.
Preferably, a second heat exchanger connected in series between the first heat exchanger and the evaporator is further arranged in the water tank body, a first connecting end and a second connecting end of the second heat exchanger are communicated through a second pipeline, and a second electromagnetic valve for opening and closing the second pipeline is arranged on the pipeline.
Preferably, the water storage tank part further comprises a third heat exchanger and a circulating water pump connected with the third heat exchanger, and the third heat exchanger is arranged outside the water tank body;
the upper end of the other side of the water tank body is provided with a circulating water inlet, the lower end of the other side of the water tank body is provided with a circulating water outlet, one end of the circulating water pump is connected with the circulating water outlet, the other end of the circulating water pump is connected with a first connecting end of a third heat exchanger, and the third heat exchanger transfers circulating water to the circulating water inlet through a second connecting end after exchanging heat with the circulating water;
and the third connecting end of the third heat exchanger is communicated with the second connecting end of the first heat exchanger, and the fourth connecting end of the third heat exchanger is communicated with the evaporator.
Preferably, a throttling part is further arranged on a passage of the first heat exchanger communicated with the evaporator.
The embodiment also provides a control method of the heat pump water heater, which comprises the following steps:
1) responding to the water demand, and detecting the water outlet temperature of the water tank body;
2) judging the current water outlet temperature T2Whether or not it is lower than the preset temperature T1If yes, executing step 3); if not, executing step 4);
3) the heat pump part is started, the first electromagnetic valve is closed simultaneously, water on the upper portion of the water tank body is rapidly heated, when the temperature of the water outlet rises to the preset temperature, water can be discharged through prompting, and the water is continuously heated until the temperature of the water outlet reaches the preset temperature T1；
4) Determining the sustainable water outlet time t of the current water outlet temperature2If the water outlet time t can be continued2Is less than the preset use time t1Then the heat pump part is started, and the first electromagnetic valve is closed at the same time to quickly heat the water on the upper part of the water tank body until t2≥ t1Or the water demand is withdrawn.
Preferably, the water outlet time t can be continued2The basis for the determination of (1) is: opening according to the current water outlet of the water tank bodyState, combined with current outlet temperature T2。
Preferably, the basis for judging the water demand withdrawal is as follows: time t of continuous non-water outlet of water tank body water outlet3≥10min。
The present embodiment will be described in detail below with respect to a static heating water heater structure and a circulation heating water heater structure.
As shown in fig. 1 to 3, in the static heating water heater structure, a heat pump water heater 1 according to the present invention includes a heat pump portion 2, a water tank portion 3, and a control portion 4.
As shown in fig. 1, the heat pump section 2 according to the present invention is constituted by a compressor 21, a four-way selector valve 22, a throttle mechanism 23, an evaporator 24, and a fan 25. Wherein the flow direction of the refrigerant in the four-way reversing valve 22 in the heating operation mode is shown by a dotted line in the figure; the flow direction of the refrigerant in the four-way reversing valve 22 in the defrosting operation mode is shown by solid lines in the figure.
As shown in fig. 1, the tank portion 3 according to the present invention is composed of a tank body 31, a first heat exchanger 33 located at an upper portion inside the tank body 31, a second heat exchanger 32 located at a lower portion inside the tank body 31, a first electromagnetic valve 35, a second electromagnetic valve 34, a hot water outlet 36 located in a case of the tank body 31, a cold water inlet 37 located in a case of the tank body 21, and a temperature detecting member 38 located in the tank body 31 near the hot water outlet 36. Wherein the first electromagnetic valve 35 and the second electromagnetic valve 34 have two states of opening and closing; when the electromagnetic valve is opened, the refrigerant can flow through the electromagnetic valve; when the electromagnetic valve is closed, the refrigerant cannot pass through the electromagnetic valve.
As shown in fig. 1, the control unit 4 according to the present invention can collect the operation parameter information of the water heater set by the user of the water heater, and control the operation states of the heat pump unit 2 and the tank unit 3 based on the collected operation parameter information.
As shown in fig. 2, the main controller according to the present invention includes a user setting information receiving module 41, an operation information collecting module 42, an electromagnetic valve control part 43, a temperature detecting module 44, and a hot water use effect estimating module 45.
As shown in fig. 2, the user setting information receiving module 41 can collect the operation parameter information of the water heater and the preset temperature T set by the user1And the like; the operation information collection module 42 is capable of collecting the operation state of the heat pump water heater 1; the electromagnetic valve control portion 43 is capable of controlling the open or closed state of the first electromagnetic valve 35, the second electromagnetic valve 34; the temperature detection module 44 can collect hot water temperature information T detected by the temperature detection part 382(ii) a The hot water usage effect estimation module 45 can estimate the time of the sustainable use of hot water based on the current hot water usage status of the user.
As shown in fig. 3, when the water heater is turned on (step S1), the process proceeds to step S2; in step S2, the water heater receives the water heater operation information set by the user through the control part 4, and then proceeds to step S3; in step S3, the first electromagnetic valve is closed, the second electromagnetic valve is opened under the control of the control portion 4, and then the flow proceeds to step S4; in step S4, the water heater operates normally according to the operation parameters set by the user, and then proceeds to step S5; in step S5, the water heater determines whether a shutdown signal is received, and if not, the process goes to step S6, otherwise, the process goes to step S12; in step S6, the water heater determines whether the user starts to use hot water, and if the user starts to use hot water, the process goes to step S7, otherwise, the process returns to step S2; in step S7, the main controller collects the hot water use temperature T1 set by the user, and then proceeds to step S8; in step S8, the main controller collects the hot water temperature T2, and then proceeds to step S9; in step S9, the main controller judges whether the current hot water use requirement can be met according to the current hot water use state and the hot water temperature T2, if the current hot water use requirement cannot be met, the step S10 is carried out, otherwise, the step S11 is carried out; in step S10, the main controller simultaneously closes the first solenoid valve and the second solenoid valve, and then proceeds to step S11; in step S11, the main controller determines whether the user stops using hot water, and if the user stops using hot water, the process proceeds to step S2, otherwise, the process proceeds to step S7.
In the water storage tank 31The hot water temperature is generally high, and when the hot water is used, the hot water in the water storage tank 31 and the cold water are mixed to the hot water use temperature T1. In step S9, the main controller controls the water heater according to the current hot water temperature T2And the estimated hot water use temperature is T1Time, the hot water can be used continuously for time t2If the hot water can be used continuously for a time t2Less than a certain time length t1(e.g. t)1Set to 15 min), the current use state requirement cannot be met, otherwise, the use requirement can be met.
In step S11, the time t for which the hot water is not used may be continued by the user3(e.g., 10 minutes), and when the main controller detects that the user does not use hot water for 10 minutes, the main controller determines that the user has stopped using hot water.
As shown in fig. 4 and 5, in a water heater structure for heating circulating water, a heat pump water heater 1 according to the present invention includes a heat pump portion 2, a water tank portion 3, and a control portion 4.
As shown in fig. 4, the heat pump section 2 according to the present invention is constituted by a compressor 21, a four-way selector valve 22, a throttle mechanism 23, an evaporator 24, and a fan 25. Wherein the flow direction of the refrigerant in the four-way reversing valve 22 in the heating operation mode is shown by a dotted line in the figure; the flow direction of the refrigerant in the four-way reversing valve 22 in the defrosting operation mode is shown by solid lines in the figure.
As shown in fig. 4, the tank portion 3 according to the present invention is composed of a tank body 31, a first heat exchanger 33 located above the inside of the tank body 31, a first electromagnetic valve 35, a hot water outlet 36 located on the casing of the tank body 31, a cold water inlet 37 located on the casing of the tank body 31, a temperature detection member 38 located near the hot water outlet 36 inside the tank body 31, a circulation water pump 39, a third heat exchanger 40 located outside the tank, a circulation water outlet 41 located on the casing of the tank body 31, and a circulation water inlet 42 located on the casing of the tank body 31. Wherein the first solenoid valve 35 has two states of open and closed; when the electromagnetic valve is opened, the refrigerant can flow through the electromagnetic valve; when the electromagnetic valve is closed, the refrigerant cannot pass through the electromagnetic valve.
To sum up, this embodiment increases heat exchanger on water tank upper portion, and in hot water heating process, because hot water density is less, cold water density is great, the temperature of the water that the storage water tank stored is from last to lower temperature more and more low, utilize the third heat exchanger who arranges on water tank upper portion to heat the hot water of water tank upper portion temperature relatively higher, detect water tank upper portion delivery port department temperature in real time simultaneously, when water tank upper portion temperature heats to required temperature, can go out water to realize the purpose of promoting the leaving water temperature fast. The technical scheme of the embodiment is also suitable for floor heating equipment with the buffer water tank, and when the floor heating equipment is just started, due to the fact that the water temperature in the buffer water tank is insufficient, water near a hot water outlet of the buffer water tank can be pertinently heated in the initial operation stage of the equipment.
Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (7)
1. A heat pump water heater comprises a heat pump part, a water storage tank part and a control part, and is characterized in that,
the control part comprises a main controller;
the heat pump part comprises a compressor, a four-way reversing valve and an evaporator which are connected in sequence, wherein a fan is arranged on one side of the evaporator, and the compressor, the four-way reversing valve, the evaporator and the fan are all electrically connected with the main controller;
the water storage tank part comprises a water tank body, a water inlet is formed at the lower end of one side of the water tank body, a water outlet is formed at the upper end of one side of the water tank body, and a temperature detection part is arranged at the water outlet; a first heat exchanger is arranged at the position, lower than the water outlet, of the upper end in the water tank body, a first connecting end of the first heat exchanger is communicated with the four-way reversing valve, and a second connecting end of the first heat exchanger is communicated with the evaporator; the first connecting end and the second connecting end of the first heat exchanger are communicated through a first pipeline, and a first electromagnetic valve for opening and closing the first pipeline is arranged on the pipeline;
the first electromagnetic valve and the temperature sensor are electrically connected with the main controller.
2. The heat pump water heater according to claim 1, wherein a second heat exchanger is further disposed in the water tank body and connected in series between the first heat exchanger and the evaporator, a first connection end and a second connection end of the second heat exchanger are communicated with each other through a second pipeline, and a second solenoid valve for opening and closing the second pipeline is disposed on the pipeline.
3. The heat pump water heater of claim 1, wherein the water storage tank portion further comprises a third heat exchanger and a circulating water pump connected with the third heat exchanger, and the third heat exchanger is arranged outside the water tank body;
the upper end of the other side of the water tank body is provided with a circulating water inlet, the lower end of the other side of the water tank body is provided with a circulating water outlet, one end of the circulating water pump is connected with the circulating water outlet, the other end of the circulating water pump is connected with a first connecting end of a third heat exchanger, and the third heat exchanger transfers circulating water to the circulating water inlet through a second connecting end after exchanging heat with the circulating water;
and the third connecting end of the third heat exchanger is communicated with the second connecting end of the first heat exchanger, and the fourth connecting end of the third heat exchanger is communicated with the evaporator.
4. The heat pump water heater according to claim 1, wherein a throttling member is further provided on a passage of the first heat exchanger communicating with the evaporator.
5. A control method of a heat pump water heater is characterized by comprising the following steps:
1) responding to the water demand, and detecting the water outlet temperature of the water tank body;
2) judging the current water outlet temperature T2Whether or not it is lower than the preset temperature T1If yes, executing step 3); if not, executing step 4);
3) the heat pump part is started, the first electromagnetic valve is closed simultaneously, water on the upper portion of the water tank body is rapidly heated, when the temperature of the water outlet rises to the preset temperature, water can be discharged through prompting, and the water is continuously heated until the temperature of the water outlet reaches the preset temperature T1；
4) Determining the sustainable water outlet time t of the current water outlet temperature2If the water outlet time t can be continued2Is less than the preset use time t1Then the heat pump part is started, and the first electromagnetic valve is closed at the same time to quickly heat the water on the upper part of the water tank body until t2≥ t1Or the water demand is withdrawn.
6. The control method of the heat pump water heater according to claim 5, wherein the water outlet time t can be continued2The basis for the determination of (1) is: according to the current water outlet opening state of the water tank main body, combining the current water outlet temperature T2。
7. The control method of the heat pump water heater according to claim 5, wherein the basis for judging the cancellation of the water demand is as follows: time t of continuous non-water outlet of water tank body water outlet3≥10min。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010930657.3A CN112066551A (en) | 2020-09-07 | 2020-09-07 | Heat pump water heater and control method thereof |
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| CN202010930657.3A CN112066551A (en) | 2020-09-07 | 2020-09-07 | Heat pump water heater and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984799A (en) * | 2021-03-25 | 2021-06-18 | 珠海格力电器股份有限公司 | Air energy water heater and control method thereof |
| CN113237227A (en) * | 2021-03-30 | 2021-08-10 | 浙江中广电器股份有限公司 | Heat pump water heater and defrosting operation control method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014101396A1 (en) * | 2012-12-25 | 2014-07-03 | Chen Jianliang | Instantaneous water heater |
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| CN105588331A (en) * | 2014-12-09 | 2016-05-18 | 海信（山东）空调有限公司 | Water tank for heat-pump water heater, heat-pump water heater and use method |
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| CN111306788A (en) * | 2020-03-27 | 2020-06-19 | 浙江中广电器股份有限公司 | Heating water tank, air energy heat pump water heater and control method thereof |
| CN213273217U (en) * | 2020-09-07 | 2021-05-25 | 浙江中广电器股份有限公司 | Heat pump water heater |
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2020
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| WO2014101396A1 (en) * | 2012-12-25 | 2014-07-03 | Chen Jianliang | Instantaneous water heater |
| CN103968554A (en) * | 2013-02-04 | 2014-08-06 | 珠海格力电器股份有限公司 | Operation control method and system for hot water production by double-compressor heat pump |
| CN105588331A (en) * | 2014-12-09 | 2016-05-18 | 海信（山东）空调有限公司 | Water tank for heat-pump water heater, heat-pump water heater and use method |
| CN108361998A (en) * | 2018-03-23 | 2018-08-03 | 合肥美的暖通设备有限公司 | The control method of Teat pump boiler |
| CN109612098A (en) * | 2018-12-21 | 2019-04-12 | 广东志高暖通设备股份有限公司 | It is a kind of can dynamic regulation water temperature hydraulic module system and control method |
| CN111306788A (en) * | 2020-03-27 | 2020-06-19 | 浙江中广电器股份有限公司 | Heating water tank, air energy heat pump water heater and control method thereof |
| CN213273217U (en) * | 2020-09-07 | 2021-05-25 | 浙江中广电器股份有限公司 | Heat pump water heater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112984799A (en) * | 2021-03-25 | 2021-06-18 | 珠海格力电器股份有限公司 | Air energy water heater and control method thereof |
| CN113237227A (en) * | 2021-03-30 | 2021-08-10 | 浙江中广电器股份有限公司 | Heat pump water heater and defrosting operation control method thereof |
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