WO2018227964A1 - Water heater and control method therefor - Google Patents

Abstract

A water heater and a control method therefor. The water heater comprises a compressor (10), a four-way valve (12), a three-way valve (14), a first heat exchanger (16), a first fan assembly (18), a second fan assembly (22), a water tank (24), a second heat exchanger (20), a detection module, and a controller; an air outlet of the compressor (10) is connected to a first end of the four-way valve (12), a second end of the four-way valve (12) is connected to one end of the first heat exchanger (16), and a third end of the four-way valve (12) is connected to one end of the second heat exchanger (20); the other end of the first heat exchanger (16) is connected to an outer coil at the upper portion of the water tank (24); the other end of the second heat exchanger (20) is connected to an outer coil at the lower portion of the water tank (24); the three-way valve (14) is provided on a pipeline between the four-way valve (12) and the first heat exchanger (16); the controller is connected to the detection module.

Description

Water heater and control method thereof

Cross-reference to related applications

This application claims the priority of the Chinese patent application number "201710444973.8", which was submitted by the American Group of HVAC Equipment Co., Ltd. on June 12, 2017 and entitled "Water Heater and Its Control Method".

Technical field

The invention relates to the technical field of water heaters, in particular to a water heater, and to a control method of a water heater.

Background technique

Air conditioner applications are becoming more and more common, and domestic air-energy water heaters are increasingly accepted by market customers. In the process of technology precipitation, Japanese companies are at the forefront. In the conventional product design, there are split-type, integrated and differentiated product design directions, and a variety of different fan solutions for the wind out and the shaft outflow.

As shown in Figure 1, the integrated square air energy water heater product is equipped with a compressor and an evaporator for absorbing heat. In the process of use, the fan will blow out the cold air, and the evaporator absorbs the low-grade heat energy in the air. The cold air is led to the kitchen through the ejector structure to reduce the temperature rise in the kitchen due to cooking and cooking, thus achieving a better customer experience. However, in actual applications, there are often customer complaints, especially when the air energy product is installed in the bathroom room. During the bathing process, the cold air blown out will have a cooling effect on the ambient temperature of the bathroom, which will cause discomfort to the customer and directly affect the comfort of the customer.

Therefore, how to provide a solution to improve the air-cooling problem of air energy products and achieve a better customer experience has become a technical problem that needs to be solved urgently.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

To this end, an object of the invention is to propose a water heater.

Another object of the present invention is to provide a method of controlling a water heater.

Another object of the present invention is to provide a storage medium.

In view of this, the present invention provides a water heater comprising: a compressor, a four-way valve, a three-way valve, a first heat exchanger, a first fan assembly, a second fan assembly, a water tank, a second heat exchanger, and a detection a module, a controller; wherein, an air outlet of the compressor is connected to the first end of the four-way valve, a second end of the four-way valve is connected to one end of the first heat exchanger, and a third end of the four-way valve is connected to the second end One end of the heat exchanger; the other end of the first heat exchanger is connected to the outer coil of the upper part of the water tank; the other end of the second heat exchanger is connected to the outer coil of the lower part of the water tank; the three-way valve is arranged at the four-way valve The pipeline is connected to the first heat exchanger; the detection module is configured to detect the outdoor ambient temperature and the temperature inside the water tank; the controller is connected to the detection module for controlling the temperature according to the outdoor ambient temperature and/or the temperature inside the water tank. Start/stop of the first/second heat exchanger, the first/second fan assembly, and the three-way valve.

According to the water heater of the present invention, a coil heat exchanger and a fan assembly are added on the basis of the existing water tank outer coil heat exchanger, specifically, the first end of the four-way valve is connected by connecting the air outlet of the compressor The second end of the four-way valve is connected to one end of the first heat exchanger, the third end of the four-way valve is connected to one end of the second heat exchanger, and the other end of the first heat exchanger is connected to the outer disk of the upper part of the water tank The tube is connected, the other end of the second heat exchanger is connected with the outer coil of the lower part of the water tank, the three-way valve is arranged on the pipeline between the four-way valve and the first heat exchanger; the controller is detected according to the outdoor of the detecting module The ambient temperature and/or the temperature inside the tank are matched with appropriate control logic to control the start and stop of the first and second heat exchangers, the first and second fan assemblies and the three-way valve; In addition to the water function, it also has a variety of operating modes, such as heating air, simultaneous hot water, heating air, and defrosting, to meet the needs of different space heating, effectively improve the air-cooling problem of air energy products, and improve the user experience. For example, in the process of using hot water, the heating air mode is turned on to ensure the hot water as the premise, and the ambient temperature of the bathing space is simultaneously heated, thereby ensuring the comfort of the bathing process. It is worth noting that the invention is not limited to preheating bath environment temperature and can meet different space heating requirements.

Wherein, when the water heater is turned on in the hot water heating mode, the control module controls the first heat exchanger and the first fan assembly to be turned on, and the three-way valve is controlled to open the first working state, and the refrigerant circulation process is, through the compressor exhaust port, Four-way valve, three-way valve, first heat exchanger, water tank, throttling device, second heat exchanger, four-way valve, compressor inlet; when the water heater is turned on in the hot air mode, the control module controls the second change The heat exchanger and the second fan assembly are opened, the three-way valve is opened to the second working state, the first heat exchanger and the first fan assembly are closed, and the refrigerant circulation process is, through the compressor exhaust port, the second heat exchanger, and the throttling The device, the water tank, the three-way valve, the four-way valve, the compressor air inlet; when the water heater is turned on the hot water mode, the control module controls the first heat exchanger and the first fan assembly to be closed, and the control three-way valve to open the first work State, the refrigerant circulation process is through the compressor exhaust port, four-way valve, three-way valve, water tank, throttling device, second heat exchanger, four-way valve, compressor inlet; when the water heater turns on the defrost mode When the control module controls the second change , A second fan assembly open, three-way control valve opens the second operating state, in order to remove the frost layer junction surface of a second heat exchanger, the refrigerant cycle system with hot air the same pattern.

Further, the above water heater according to the present invention may further have the following additional technical features:

In the above technical solution, preferably, the water heater further comprises: a throttle device, and the throttle device is disposed between the second heat exchanger and the water tank.

In the technical solution, by disposing the throttling device between the second heat exchanger and the water tank, the temperature can be effectively reduced, decompressed, and the flow rate of the refrigerant can be adjusted to avoid overheating of the heat exchanger outlet, thereby achieving energy saving and water heater heating. The role of heating effect.

In any of the above technical solutions, preferably, the water heater further comprises: a return air pipe for connecting the air inlet of the compressor and the fourth end of the four-way valve.

In the technical solution, the air return pipe connects the air inlet of the compressor with the fourth end of the four-way valve, and realizes different operation modes by switching the direction of the compressor exhaust pipe and the return pipe into the heat exchanger. To meet different heating needs.

In any one of the above aspects, preferably, the detecting module includes a first temperature sensor and a second temperature sensor; wherein the first temperature sensor is disposed on the pipeline between the four-way valve and the second heat exchanger, and is located at The second heat exchanger is located near one end of the heat exchanger for detecting the outdoor ambient temperature; the second temperature sensor is disposed on the water tank and located at the upper portion of the water tank for detecting the temperature inside the water tank.

In the technical solution, the outdoor temperature is detected by the first temperature sensor, and the temperature of the interior of the water tank is detected by the second temperature sensor, so that the controller matches the appropriate control logic according to the detected outdoor ambient temperature and the temperature inside the water tank to control The start and stop of the heat exchanger, the fan assembly and the three-way valve enable a variety of operating modes to meet the needs of different user scenarios.

The present invention also provides a water heater control method for the water heater according to any one of the above technical solutions, the control method comprising: receiving a working mode selection instruction, controlling the water heater to open a corresponding working mode according to the working mode selection instruction; detecting the outdoor The ambient temperature and/or the temperature inside the water tank; controlling the start and stop of the first/second heat exchanger, the first/second fan assembly, and the three-way valve according to the outdoor ambient temperature and/or the temperature inside the water tank.

According to the control method of the water heater of the present invention, the user can select the operation mode of the water heater according to different usage requirements, and control the first and second heat exchangers according to the outdoor ambient temperature and/or the temperature inside the water tank, first, first The start and stop of the two-fan assembly and the three-way valve make the water heater not only have the conventional hot water function, but also have various operating modes of heating air, simultaneous hot water, heating air and defrosting, so as to meet different space heating. Demand, effectively improve the air-cooling problem of air energy products and enhance the user experience. For example, in the process of using hot water, the heating air mode is turned on to ensure the hot water as the premise, and the ambient temperature of the bathing space is simultaneously heated, thereby ensuring the comfort of the bathing process. It is worth noting that the invention is not limited to preheating bath environment temperature and can meet different space heating requirements.

In the above technical solution, preferably, when the water heater is turned on in the hot water heating hot air mode, the first heat exchanger and the first fan assembly are controlled to be opened, the three-way valve is controlled to open the first working state; and the temperature inside the water tank is detected; Whether the temperature inside the water tank is greater than or equal to the first preset temperature; when it is determined that the temperature inside the water tank is greater than or equal to the first preset temperature, the first heat exchanger, the first fan component, and the three-way valve are controlled to enter a standby state.

In the technical solution, when the water heater is turned on in the hot water heating hot air mode, the first working state of the three-way valve is opened by opening the first heat exchanger and the first fan assembly, and the refrigerant passes through the compressor exhaust port and the cross. The valve, the three-way valve, the first heat exchanger, the water tank, the throttling device, the second heat exchanger, the four-way valve, the compressor inlet port enter the compressor to form a cycle, and the temperature inside the water tank is detected, when the water tank is inside When the temperature is at the first preset temperature, the first heat exchanger, the first fan assembly, and the three-way valve are controlled to enter a standby state. Therefore, the premise of ensuring hot water is realized, and the heat of the original hot water is used to synchronously preheat the temperature in the bath space, thereby effectively improving the comfort of the bathing process. It is worth noting that the invention is not limited to preheating bath environment temperature and can meet different space heating requirements.

In any of the above technical solutions, preferably, when the water heater is turned on in the heating air mode, the second heat exchanger and the second fan assembly are controlled to be opened, and the three-way valve is controlled to open the second working state; detecting the temperature inside the water tank and the outdoor environment Temperature; record the opening time of the hot air mode; determine whether the opening time is less than or equal to the preset time; when determining that the opening time is less than or equal to the preset time, compare the temperature inside the water tank with the first preset temperature, and compare the outdoor ambient temperature Comparing with the second preset temperature; adjusting the working mode of the water heater according to the comparison result; and controlling the water heater to turn off the heating air mode when determining that the opening time is longer than the preset time length.

In the technical solution, when the water heater is turned on in the heating air mode, the second heat exchanger and the second fan assembly are turned on to open and open the second working state of the three-way valve, and the first heat exchanger and the first fan assembly are closed, and the refrigerant is After entering the compressor through the compressor exhaust port, the second heat exchanger, the throttling device, the water tank, the three-way valve, the four-way valve, and the compressor inlet, the compressor forms a circulation; in order to ensure the heating effect of the water heater, when the heating air is heated When the mode is longer than the preset time, it is generally set to 20 minutes to directly turn off the heating air; when the heating air mode is on for a preset period of time, the water heater is adjusted according to the temperature inside the water tank and the outdoor temperature. The mode, on the one hand, meets the user's demand for hot air, and on the other hand ensures the heating effect of the water heater.

In any one of the above technical solutions, preferably, the step of adjusting the working mode of the water heater according to the comparison result comprises: controlling the water heater when a difference between the first preset temperature and the temperature inside the water tank is less than a first preset threshold The heating air mode is turned off; when the outdoor ambient temperature is greater than the second preset temperature, the water heater is controlled to turn off the heating air mode, and the hot water mode is turned on.

In the technical solution, when the difference between the first preset temperature and the temperature inside the water tank is less than the first preset threshold, the heating air is stopped in advance, and the water heater is controlled to be insulated, and the hot water can be turned on after the heat preservation is completed. When the outdoor ambient temperature is greater than the second preset temperature, the heating air is turned off and the hot water is directly turned on.

In any of the above technical solutions, preferably, when the water heater is turned on in the hot water mode, the first fan assembly is controlled to be closed, and the three-way valve is controlled to open the first working state.

In the technical solution, when the water heater is turned on in the hot water mode, the first heat exchanger and the first fan assembly are closed, and the first working state of the three-way valve is opened, and the refrigerant passes through the compressor exhaust port, the four-way valve, and the third The valve, the water tank, the throttle device, the second heat exchanger, and the four-way valve enter the compressor to form a circulation after the air inlet of the compressor, and automatically enter the heat preservation when the temperature inside the water tank reaches the power-on requirement point, and complete the hot water supply. .

In any of the above technical solutions, preferably, when the water heater turns on the defrosting mode, the second heat exchanger and the second fan assembly are controlled to be turned on, and the three-way valve is controlled to open the second working state.

In the technical solution, when the water heater turns on the defrosting mode, the second heat exchanger, the second fan assembly, and the second working state of the three-way valve are opened to remove the frost layer formed on the surface of the second heat exchanger. The refrigerant circulation process is the same as the heating air mode, and when the defrosting is completed, it automatically enters the standby state.

In any of the above technical solutions, preferably, the range of the preset duration is 15 minutes to 20 minutes; the range of the first preset threshold is 6 to 9; and the range of the second preset temperature is 18 to 22.

In this technical solution, the range of the preset duration includes, but is not limited to, 15 minutes to 20 minutes; the range of the first preset threshold includes, but is not limited to, 6 to 9; the range of the second preset temperature includes But not limited to 18 to 22.

In any of the above technical solutions, preferably, the preset duration is 20 minutes; the first preset threshold is 8; and the second preset temperature is 20.

In this technical solution, the preset duration is 20 minutes, the first preset threshold is 8, and the second preset temperature is 20, but are not limited thereto.

The present invention also proposes a storage medium for storing an application for performing the above-described control method of the water heater.

Additional aspects and advantages of the invention will be apparent from the description of the invention.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

Figure 1 shows a schematic view of a water heater of one embodiment of the prior art;

Figure 2 shows a schematic view of a water heater in accordance with one embodiment of the present invention;

3 is a flow chart showing a method of controlling a water heater according to an embodiment of the present invention;

4 is a flow chart showing a method of controlling a water heater according to another embodiment of the present invention;

FIG. 5 is a flow chart showing a control method of a water heater according to still another embodiment of the present invention; FIG.

Figure 6 shows a schematic diagram of the control principle of a water heater in accordance with an embodiment of the present invention.

Wherein, the correspondence between the reference numerals and the component names in FIG. 2 is:

10 compressor, 12 four-way valve, 14 three-way valve, 16 first heat exchanger, 18 first fan assembly, 20 second heat exchanger, 22 second fan assembly, 24 water tank, 26 throttling device, 28 times Air tube, 30 first temperature sensor, 32 second temperature sensor.

detailed description

The present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that the features of the embodiments and 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 full understanding of the invention, but the invention may be practiced otherwise than as described herein. Limitations of the embodiments.

A water heater in accordance with some embodiments of the present invention is described below with reference to FIG.

As shown in FIG. 2, the present invention provides a water heater comprising: a compressor 10, a four-way valve 12, a three-way valve 14, a first heat exchanger 16, a first fan assembly 18, a second fan assembly 22, and a water tank. 24. The second heat exchanger 20, the detection module, and the controller; wherein the air outlet of the compressor 10 is connected to the first end of the four-way valve 12, and the second end of the four-way valve 12 is connected to the first heat exchanger 16 At one end, the third end of the four-way valve 12 is connected to one end of the second heat exchanger 20; the other end of the first heat exchanger 16 is connected to the outer coil of the upper portion of the water tank 24; the other of the second heat exchanger 20 One end is connected to the outer coil of the lower part of the water tank 24; the three-way valve 14 is disposed on the pipeline between the four-way valve 12 and the first heat exchanger 16; the detecting module is for detecting the outdoor ambient temperature and the temperature inside the water tank 24; The controller is coupled to the detection module for controlling the first/second heat exchanger 20, the first/second fan assembly 22, and the tee according to the operating mode of the water heater, the outdoor ambient temperature, and/or the temperature inside the water tank 24. Start and stop of the valve 14.

The water heater provided by the invention adds a set of coil heat exchangers and fan assemblies on the basis of the outer coil heat exchanger of the existing water tank 24, specifically, by connecting the air outlet of the compressor 10 to the four-way valve 12 At the first end, the second end of the four-way valve 12 is connected to one end of the first heat exchanger 16, and the third end of the four-way valve 12 is connected to one end of the second heat exchanger 20, and the first heat exchanger 16 is The other end is connected to the outer coil of the upper portion of the water tank 24, the other end of the second heat exchanger 20 is connected to the outer coil of the lower portion of the water tank 24, and the three-way valve 14 is disposed at the four-way valve 12 and the first heat exchanger 16 Between the pipes; the controller matches the appropriate control logic to control the first and second heat exchangers 20, the first and second fan components according to the outdoor ambient temperature detected by the detection module and/or the temperature inside the water tank 24. 22 and three-way valve 14 start and stop; in addition to the conventional hot water function, the water heater also has a variety of operating modes of heating air, simultaneous hot water and heating air, defrosting, to meet different space heating needs Effectively improve the air-cooling problem of air energy products and enhance the user experience. For example, in the process of using hot water, the heating air mode is turned on to ensure the hot water as the premise, and the ambient temperature of the bathing space is simultaneously heated, thereby ensuring the comfort of the bathing process. It is worth noting that the invention is not limited to preheating bath environment temperature and can meet different space heating requirements.

Wherein, when the water heater is turned on in the hot water heating hot air mode, the control module controls the first heat exchanger 16 and the first fan assembly 18 to be opened, and the three-way valve 14 is controlled to open the first working state, and the refrigerant circulation process is through the compressor 10 Exhaust port, four-way valve 12, three-way valve 14, first heat exchanger 16, water tank 24, throttling device 26, second heat exchanger 20, four-way valve 12, compressor 10 inlet; When the heating air mode is turned on, the control module controls the second heat exchanger 20 and the second fan assembly 22 to be opened, the three-way valve 14 to open the second working state, the first heat exchanger 16 and the first fan assembly 18 are closed, and the refrigerant circulation process Therefore, through the compressor 10 exhaust port, the second heat exchanger 20, the throttle device 26, the water tank 24, the three-way valve 14, the four-way valve 12, the compressor 10 intake port; when the water heater is turned on the hot water mode The control module controls the first heat exchanger 16 and the first fan assembly 18 to be closed, and controls the three-way valve 14 to open the first working state. The refrigerant circulation process is through the compressor 10 exhaust port, the four-way valve 12, and the three-way valve. 14. Water tank 24, throttling device 26, second heat exchanger 20, four-way valve 12, compressor 10 When the water heater turns on the defrosting mode, the control module controls the second heat exchanger 20 and the second fan assembly 22 to open, and controls the three-way valve 14 to open the second working state to remove the surface of the second heat exchanger 20 In the frost layer, the refrigerant circulation process is the same as the heating air mode.

In the above embodiment, preferably, the water heater further includes a throttling device 26 disposed between the second heat exchanger 20 and the water tank 24.

In this embodiment, by disposing the throttling device 26 between the second heat exchanger 20 and the water tank 24, the temperature can be effectively reduced, decompressed, and the flow rate of the refrigerant can be adjusted to avoid overheating of the heat exchanger outlet, thereby achieving energy saving and consumption reduction. Improve the heating effect of the water heater.

In any of the above embodiments, preferably, the water heater further comprises: a return air pipe 28 for connecting the air inlet of the compressor 10 and the fourth end of the four-way valve 12.

In this embodiment, the return air pipe 28 connects the intake port of the compressor 10 with the fourth end of the four-way valve 12, and by switching the direction in which the compressor 10 exhaust pipe and the return pipe 28 enter the heat exchanger, thereby achieving Different operating modes are implemented to meet different heating needs.

In any of the above embodiments, preferably, the detecting module comprises a first temperature sensor 30 and a second temperature sensor 32; wherein the first temperature sensor 30 is disposed between the four-way valve 12 and the second heat exchanger 20 The pipeline is located near one end of the second heat exchanger 20 for detecting the outdoor ambient temperature; the second temperature sensor 32 is disposed on the water tank 24 at the upper portion of the water tank 24 for detecting the temperature inside the water tank 24.

In this embodiment, the outdoor temperature is detected by the first temperature sensor 30, and the second temperature sensor 32 detects the temperature inside the water tank 24, so that the controller matches the appropriate temperature according to the detected outdoor ambient temperature and the temperature inside the water tank 24. Logic, to control the start and stop of the heat exchanger, fan assembly and three-way valve 14, to achieve a variety of operating modes to meet the needs of different user scenarios.

FIG. 3 is a schematic flow chart of a method of controlling a water heater according to an embodiment of the present invention. The control method 300 is used in the water heater according to any of the above embodiments, and the control method 300 includes:

Step 302: Receive a working mode selection instruction, and control a water heater to open a corresponding working mode according to the working mode selection instruction.

Step 304, detecting an outdoor ambient temperature and/or a temperature inside the water tank;

Step 306, controlling start and stop of the first/second heat exchanger, the first/second fan assembly, and the three-way valve according to the outdoor ambient temperature and/or the temperature inside the water tank.

According to the control method of the water heater provided by the invention, the user can select the operation mode of the water heater according to different usage requirements, and control the first and second heat exchangers according to the outdoor ambient temperature and/or the temperature inside the water tank, first and second The start and stop of the two-fan assembly and the three-way valve make the water heater not only have the conventional hot water function, but also have various operating modes of heating air, simultaneous hot water, heating air and defrosting, so as to meet different space heating. Demand, effectively improve the air-cooling problem of air energy products and enhance the user experience. For example, in the process of using hot water, the heating air mode is turned on to ensure the hot water as the premise, and the ambient temperature of the bathing space is simultaneously heated, thereby ensuring the comfort of the bathing process. It is worth noting that the invention is not limited to preheating bath environment temperature and can meet different space heating requirements.

FIG. 4 is a flow chart showing a method of controlling a water heater according to another embodiment of the present invention. The control method 400 is used in the water heater according to any of the above embodiments, and the control method 400 includes:

Step 402: Receive a working mode selection instruction, and control a water heater to open a corresponding working mode according to the working mode selection instruction.

Step 404, when the water heater turns on the hot water heating hot air mode, the first heat exchanger and the first fan component are controlled to be opened, and the three-way valve is controlled to open the first working state;

Step 406, detecting the temperature inside the water tank;

Step 408, determining whether the temperature inside the water tank is greater than or equal to the first preset temperature;

Step 410, when it is determined that the temperature inside the water tank is greater than or equal to the first preset temperature, the first heat exchanger, the first fan component, and the three-way valve are controlled to enter a standby state; when it is determined that the temperature inside the water tank is less than the first preset temperature Go back to step 406.

In this embodiment, when the water heater is turned on in the hot water heating hot air mode, the first working state of the three-way valve is opened by opening the first heat exchanger and the first fan assembly, and the refrigerant passes through the compressor exhaust port and the cross. The valve, the three-way valve, the first heat exchanger, the water tank, the throttling device, the second heat exchanger, the four-way valve, the compressor inlet port enter the compressor to form a cycle, and the temperature inside the water tank is detected, when the water tank is inside When the temperature is at the first preset temperature, the first heat exchanger, the first fan assembly, and the three-way valve are controlled to enter a standby state. Therefore, the premise of ensuring hot water is realized, and the heat of the original hot water is used to synchronously preheat the temperature in the bathing space, thereby effectively improving the comfort of the bathing process. It is worth noting that the invention is not limited to preheating bath environment temperature and can meet different space heating requirements.

FIG. 5 is a flow chart showing a method of controlling a water heater according to still another embodiment of the present invention. The control method 500 is used in the water heater according to any of the above embodiments, and the control method 500 includes:

Step 502: Receive a working mode selection instruction, and control a water heater to open a corresponding working mode according to the working mode selection instruction.

Step 504: When the water heater turns on the hot water heating hot air mode, the first heat exchanger and the first fan component are controlled to be turned on, and the three-way valve is controlled to open the first working state;

Step 506, detecting the temperature inside the water tank;

Step 508, determining whether the temperature inside the water tank is greater than or equal to the first preset temperature;

Step 510, when it is determined that the temperature inside the water tank is greater than or equal to the first preset temperature, controlling the first heat exchanger, the first air compressor component, and the three-way valve to enter a standby state;

Step 512, when the water heater is turned on in the heating air mode, the second heat exchanger and the second fan assembly are controlled to be opened, and the three-way valve is controlled to open the second working state;

Step 514, detecting the temperature inside the water tank and the outdoor ambient temperature.

Step 516, recording the opening time of the hot air mode;

Step 518, determining whether the opening duration is less than or equal to the preset duration;

Step 520, when it is determined that the opening time is less than or equal to the preset time length, comparing the temperature inside the water tank with the first preset temperature, and comparing the outdoor ambient temperature with the second preset temperature;

Step 522: When the difference between the first preset temperature and the temperature inside the water tank is less than a first preset threshold, controlling the water heater to turn off the heating air mode;

When the outdoor ambient temperature is greater than the second preset temperature, the water heater is controlled to turn off the heating air mode, and the hot water mode is turned on;

Step 524, when it is determined that the opening time is greater than the preset time length, controlling the water heater to turn off the heating air mode;

Step 526, when the water heater is turned on in the hot water mode, controlling the first fan assembly to be closed, and controlling the three-way valve to open the first working state;

Step 528, determining whether the temperature inside the water tank reaches a first preset temperature;

Step 530, when the determination result is yes, enter the original mode standby holding state; otherwise, return to step 526;

Step 532, when the water heater starts the defrosting mode, controlling the second heat exchanger and the second fan assembly to open, and controlling the three-way valve to open the second working state;

In step 534, it is determined whether the defrosting is completed. When the defrosting is completed, step 530 is executed to enter the original mode standby holding state; otherwise, the process returns to step 532.

In this embodiment, when the water heater is turned on in the heating air mode, the second heat exchanger and the second fan assembly are turned on to open and open the second working state of the three-way valve, and the first heat exchanger and the first fan assembly are closed, and the refrigerant is After entering the compressor through the compressor exhaust port, the second heat exchanger, the throttling device, the water tank, the three-way valve, the four-way valve, and the compressor inlet, the compressor forms a circulation; in order to ensure the heating effect of the water heater, when the heating air is heated When the mode is longer than the preset time, it is generally set to 20 minutes to directly turn off the heating air; when the heating air mode is on for a preset period of time, the water heater is adjusted according to the temperature inside the water tank and the outdoor temperature. The mode, on the one hand, meets the user's demand for hot air, and on the other hand ensures the heating effect of the water heater.

When the difference between the first preset temperature and the temperature inside the water tank is less than the first preset threshold, the heating air is stopped in advance, and the water heater is controlled to be insulated, and the hot water can be turned on after the heat preservation is completed; when the outdoor environment temperature is greater than At the second preset temperature, the heating air is turned off and the hot water is directly turned on.

When the water heater is turned on in the hot water mode, the first heat exchanger and the first fan assembly are closed, and the first working state of the three-way valve is opened, and the refrigerant passes through the compressor exhaust port, the four-way valve, the three-way valve, the water tank, and the section. The flow device, the second heat exchanger, the four-way valve, and the compressor inlet port enter the compressor to form a circulation. When the temperature inside the water tank reaches the power-on requirement point, the heat is automatically entered to complete the hot water production.

When the water heater starts the defrost mode, the second heat exchanger, the second fan assembly, and the second working state of the three-way valve are opened to remove the frost layer formed on the surface of the second heat exchanger, and the refrigerant circulation process and system The hot air mode is the same, and when the defrosting is completed, it automatically enters the standby state.

In any of the above embodiments, preferably, the range of the preset duration is 15 minutes to 20 minutes; the range of the first preset threshold is 6 to 9; and the range of the second preset temperature is 18 to 22.

In this embodiment, the range of values of the preset duration includes, but is not limited to, 15 minutes to 20 minutes; the range of values of the first preset threshold includes but is not limited to 6 to 9; the range of values of the second preset temperature includes But not limited to 18 to 22.

In any of the above embodiments, preferably, the preset duration is 20 minutes; the first preset threshold is 8; and the second preset temperature is 20.

In this embodiment, the preset duration is 20 minutes, the first preset threshold is 8, and the second preset temperature is 20, but are not limited thereto.

FIG. 6 is a schematic view showing the control principle of a water heater according to an embodiment of the present invention. Wherein, the water heater comprises a compressor, a four-way reversing valve, an exhaust temperature sensor TP, an outdoor temperature sensor TA, an evaporator temperature sensor T3, an electronic throttle component, a fan assembly a, a heat exchanger a, an outer coil water tank, Water tank upper temperature sensor TH, water tank lower temperature sensor TL, fan assembly b, heat exchanger b, electric three-way valve and main control board.

In this embodiment, the main control board controls the compressor and the four-way exchange according to the measured data transmitted by the exhaust temperature sensor TP, the outdoor temperature sensor TA, the evaporator temperature sensor T3, the upper tank temperature sensor TH, and the lower tank temperature sensor TL. The opening and closing of the valve, the electronic throttle component, the fan assembly a, and the fan assembly b, by optimizing the control logic, to improve the blowing air problem of the air energy product to a certain extent, so that the water heater has the function of conventional hot water heating, It can realize the preparation of hot air, preheating the ambient temperature in the bathing environment, ensuring the comfort of the bathing process, and simultaneously performing various modes of hot water and heating wind and defrosting, greatly improving the user experience, and further, the present invention It is not limited to preheating bath environment temperature, which can meet different space heating requirements.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims (13)

1. A water heater, comprising:

   a compressor, a four-way valve, a three-way valve, a first heat exchanger, a first fan assembly, a second heat exchanger, a second fan assembly, a water tank, a detection module, and a controller; wherein

   An air outlet of the compressor is connected to a first end of the four-way valve, a second end of the four-way valve is connected to one end of the first heat exchanger, and a third end of the four-way valve is connected To one end of the second heat exchanger;

   The other end of the first heat exchanger is connected to an outer coil of the upper portion of the water tank;

   The other end of the second heat exchanger is connected to the outer coil of the lower part of the water tank;

   The three-way valve is disposed on a pipe between the four-way valve and the first heat exchanger;

   The detecting module is configured to detect an outdoor ambient temperature and a temperature inside the water tank;

   The controller is connected to the detecting module, and configured to control the first/second heat exchanger, the first/second fan according to the outdoor ambient temperature and/or the temperature inside the water tank The assembly and the start and stop of the three-way valve.
2. The water heater according to claim 1, further comprising:

   a throttle device, the throttle device being disposed between the second heat exchanger and the water tank.
3. The water heater according to claim 1 or 2, further comprising:

   a return air pipe for connecting an intake port of the compressor and a fourth end of the four-way valve.
4. A water heater according to any one of claims 1 to 3, characterized in that

   The detecting module includes a first temperature sensor and a second temperature sensor; wherein

   The first temperature sensor is disposed on a pipeline between the four-way valve and the second heat exchanger, and is located near the one end of the second heat exchanger for detecting the outdoor ambient temperature ;

   The second temperature sensor is disposed on the water tank and is located at an upper portion of the water tank for detecting a temperature inside the water tank.
5. A water heater control method for a water heater according to any one of claims 1 to 4, wherein the control method comprises:

   Receiving a working mode selection instruction, and controlling the water heater to open a corresponding working mode according to the working mode selection instruction;

   Detecting the outdoor ambient temperature and/or the temperature inside the water tank;

   The start and stop of the first/second heat exchanger, the first/second fan assembly, and the three-way valve are controlled according to the outdoor ambient temperature and/or the temperature inside the water tank.
6. A method of controlling a water heater according to claim 5, wherein

   Controlling the first heat exchanger and the first fan assembly to be turned on when the water heater is turned on in the hot water heating hot air mode, and controlling the three-way valve to open the first working state;

   Detecting the temperature inside the water tank;

   Determining whether the temperature inside the water tank is greater than or equal to a first preset temperature;

   When it is determined that the temperature inside the water tank is greater than or equal to the first preset temperature, the first heat exchanger, the first fan assembly, and the three-way valve are controlled to enter a standby state.
7. A method of controlling a water heater according to claim 5 or 6, wherein

   Controlling the second heat exchanger and the second fan assembly to be turned on when the water heater is turned on in the heating air mode, and controlling the three-way valve to open the second working state;

   Detecting a temperature inside the water tank and the outdoor ambient temperature;

   Recording the opening time of the heating air mode;

   Determining whether the opening duration is less than or equal to a preset duration;

   When it is determined that the opening duration is less than or equal to a preset duration, comparing a temperature inside the water tank with a first preset temperature, and comparing the outdoor ambient temperature with a second preset temperature;

   Adjusting the working mode of the water heater according to the comparison result;

   When it is determined that the opening time is greater than a preset time length, the water heater is controlled to close the heating air mode.
8. The method for controlling the water heater according to claim 7, wherein the step of adjusting the working mode of the water heater according to the comparison result comprises:

   Controlling the water heater to turn off the heating air mode when a difference between the first preset temperature and a temperature inside the water tank is less than a first preset threshold;

   When the outdoor ambient temperature is greater than the second preset temperature, the water heater is controlled to turn off the heating air mode, and the hot water mode is turned on.
9. A method of controlling a water heater according to claim 8, wherein

   When the water heater turns on the hot water mode, the first heat exchanger, the first fan assembly is closed, and the three-way valve is controlled to open the first working state.
10. A method of controlling a water heater according to any one of claims 5-9, characterized in that

    When the water heater turns on the defrosting mode, the second heat exchanger and the second fan assembly are controlled to be turned on, and the three-way valve is controlled to open the second working state.
11. A method of controlling a water heater according to any one of claims 7 to 10, characterized in that

    The preset duration ranges from 15 minutes to 20 minutes;

    The range of the first preset threshold: 6 to 9;

    The second preset temperature ranges from 18 to 22.
12. A method of controlling a water heater according to any one of claims 7 to 10, characterized in that

    The preset duration is 20 minutes;

    The first preset threshold is 8;

    The second preset temperature is 20.
13. A storage medium for storing an application for performing the control method of the water heater according to any one of claims 5 to 12.

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