阅读说明：本技术 家庭热水系统及其控制方法 (Household hot water system and control method thereof ) 是由 李刚 李建科 杜超 高德建 杨伟 于 2021-06-29 设计创作，主要内容包括：本发明提供一种家庭热水系统及其控制方法,其中家庭热水控制系统包括：热水器,包括水箱以及设于所述水箱的电加热装置,所述电加热装置用于对水箱内的水进行加热；以及,单模式空调,所述单模式空调仅具有制冷模式,所述单模式空调包括依次串联的蒸发器、压缩机以及冷凝器；其中,所述冷凝器包括并联的水冷式冷凝器以及空冷式冷凝器,所述水冷式冷凝器设于所述水箱内,所述空冷式冷凝器用于设于室外。本发明提供的家庭热水系统及其控制方法,通过回收空调制冷时冷凝器散发的热量,对家庭用水进行加热,能够达到节能减排的效果。(The invention provides a household hot water system and a control method thereof, wherein the household hot water system comprises: the water heater comprises a water tank and an electric heating device arranged on the water tank, wherein the electric heating device is used for heating water in the water tank; the single-mode air conditioner only has a refrigeration mode, and comprises an evaporator, a compressor and a condenser which are sequentially connected in series; wherein, the condenser includes parallelly connected water-cooled condenser and air-cooled condenser, water-cooled condenser locates in the water tank, the air-cooled condenser is used for locating outdoors. According to the household hot water system and the control method thereof, the household water is heated by recovering the heat emitted by the condenser during air conditioning refrigeration, so that the effects of energy conservation and emission reduction can be achieved.)

1. A domestic water heating system, comprising:

the water heater comprises a water tank and an electric heating device arranged on the water tank, wherein the electric heating device is used for heating water in the water tank; and the number of the first and second groups,

the single-mode air conditioner only has a refrigeration mode and comprises an evaporator, a compressor and a condenser which are sequentially connected in series;

wherein, the condenser includes parallelly connected water-cooled condenser and air-cooled condenser, water-cooled condenser locates in the water tank, the air-cooled condenser is used for locating outdoors.

2. The home water heating system according to claim 1, wherein the compressor is in communication with the water-cooled condenser and the air-cooled condenser through an electronic three-way valve.

3. The home water heating system according to claim 1, further comprising a temperature sensing device including a first temperature sensing structure disposed in the water tank for sensing a temperature of water in the water tank and a second temperature sensing structure disposed on the compressor for sensing a top cover discharge temperature of the compressor.

4. The home water heating system according to claim 1, wherein the water-cooled condenser and the air-cooled condenser each include a refrigerant inlet and a refrigerant outlet, and each of the refrigerant outlets is provided with a check valve.

5. The home water heating system according to claim 1, wherein the water-cooled condenser has a heat exchange pipe and a heat sink, and the heat exchange pipe and the heat sink are coated with a teflon anti-corrosion layer.

6. A home water heating system control method based on the home water heating system of any one of claims 1 to 5, comprising:

acquiring the working state of an air conditioner;

if the air conditioner is in a working state, the evaporator, the compressor and the water-cooled condenser are communicated;

acquiring the temperature of a water tank set by a user;

acquiring the actual water tank temperature once every preset time;

if the actual water tank temperature exceeds the set water tank temperature, communicating the evaporator, the compressor and the air cooler condenser;

and if the air conditioner is in a closed state, the electric heating device of the water heater is turned on.

7. The home water heating system control method as claimed in claim 6, further comprising, before the step of communicating the evaporator, the compressor and the air cooler condenser if the actual tank temperature exceeds the set tank temperature:

acquiring the working state of the air conditioner once every preset time;

and if the air conditioner is in a closed state and the actual water tank temperature is lower than the set water tank temperature, turning on an electric heating device of the water heater.

8. The home hot water system control method as claimed in claim 7, further comprising, after the turning on the electric heating device of the water heater:

acquiring the actual water tank temperature once every preset time;

and if the actual water tank temperature exceeds the set water tank temperature, closing the electric heating device.

9. The home hot water system control method as claimed in claim 6, further comprising, after acquiring the actual tank temperature once every preset time interval:

acquiring the temperature of the air outlet of the primary compressor at preset intervals;

calculating a first temperature difference value between the actual water tank temperature and the compressor air outlet temperature;

acquiring the actual temperature and the set temperature of the air conditioner;

calculating a second temperature difference value of the actual temperature of the air conditioner and the set temperature;

and adjusting the power of the compressor according to the first temperature difference and the second temperature difference.

10. The home water heating system control method as claimed in claim 9, wherein the adjusting the power of the compressor according to the first temperature difference and the second temperature difference comprises:

and if the first temperature difference value is smaller than a first preset value and the second temperature difference value is larger than a second preset value, increasing the power of the compressor.

Technical Field

The invention relates to the field of hot water systems, in particular to a household hot water system and a control method thereof.

Background

The traditional heat dissipation method of the air conditioner condenser is to forcibly exchange heat with the condenser through an axial flow fan of an outdoor unit, so as to dissipate heat of the condenser and discharge the heat into the atmosphere. Although the indoor temperature is reduced, the heat emitted by the condenser easily causes a heat island effect and is not beneficial to energy conservation and emission reduction. In addition, the hot water in the domestic water accounts for a large part, and the traditional technology mostly uses gas or electricity to heat the hot water, which is not beneficial to saving energy. If the heat dissipation of the air conditioner condenser is recovered and applied to heating of household water, the heat island effect can be effectively reduced, and the effects of energy conservation and emission reduction are achieved.

Disclosure of Invention

The invention provides a household hot water system and a control method thereof, which are used for solving the problems that the heat dissipation of an air conditioning condenser in the prior art cannot be recycled and the heat island effect is easily caused.

To solve the problems in the prior art, an embodiment of the present invention provides a home hot water system, including:

the water heater comprises a water tank and an electric heating device arranged on the water tank, wherein the electric heating device is used for heating water in the water tank; and the number of the first and second groups,

the single-mode air conditioner only has a refrigeration mode and comprises an evaporator, a compressor and a condenser which are sequentially connected in series;

wherein, the condenser includes parallelly connected water-cooled condenser and air-cooled condenser, water-cooled condenser locates in the water tank, the air-cooled condenser is used for locating outdoors.

According to the household water heating system provided by the invention, the compressor is communicated with the water-cooled condenser and the air-cooled condenser through the electronic three-way valve.

According to the household hot water system provided by the invention, the household hot water system further comprises a temperature detection device, the temperature detection device comprises a first temperature detection structure and a second temperature detection structure, the first temperature detection structure is arranged in the water tank and used for detecting the temperature of water in the water tank, and the second temperature detection structure is arranged on the compressor and used for detecting the exhaust temperature of the top cover of the compressor.

According to the household hot water system provided by the invention, the water-cooled condenser and the air-cooled condenser respectively comprise a refrigerant inlet and a refrigerant outlet, and each refrigerant outlet is provided with a check valve.

According to the household hot water system provided by the invention, the water-cooled condenser is provided with the heat exchange tube and the radiating fin, and the heat exchange tube and the radiating fin are coated with Teflon anti-corrosion layers.

Based on the household hot water system, the invention also provides a control method of the household hot water system, which comprises the following steps:

acquiring the working state of an air conditioner;

if the air conditioner is in a working state, the evaporator, the compressor and the water-cooled condenser are communicated;

acquiring the temperature of a water tank set by a user;

acquiring the actual water tank temperature once every preset time;

if the actual water tank temperature exceeds the set water tank temperature, communicating the evaporator, the compressor and the air cooler condenser;

and if the air conditioner is in a closed state, the electric heating device of the water heater is turned on.

According to the present invention, before "if the actual water tank temperature exceeds the set water tank temperature, the method for controlling a home water heating system further includes:

acquiring the working state of the air conditioner once every preset time;

and if the air conditioner is in a closed state and the actual water tank temperature is lower than the set water tank temperature, turning on an electric heating device of the water heater.

According to the control method of the household hot water system provided by the invention, after the step of turning on the electric heating device of the water heater, the method further comprises the following steps:

acquiring the actual water tank temperature once every preset time;

and if the actual water tank temperature exceeds the set water tank temperature, closing the electric heating device.

According to the control method of the household hot water system provided by the invention, after the step of obtaining the actual water tank temperature once every preset time, the method further comprises the following steps:

acquiring the temperature of the air outlet of the primary compressor at preset intervals;

calculating a first temperature difference value between the actual water tank temperature and the compressor air outlet temperature;

acquiring the actual temperature and the set temperature of the air conditioner;

calculating a second temperature difference value of the actual temperature of the air conditioner and the set temperature;

and adjusting the power of the compressor according to the first temperature difference and the second temperature difference.

According to the control method of the home hot water system provided by the present invention, the "adjusting the power of the compressor according to the first temperature difference and the second temperature difference" comprises:

and if the first temperature difference value is smaller than a first preset value and the second temperature difference value is larger than a second preset value, increasing the power of the compressor.

According to the household hot water system, different water-cooled condensers and air-cooled condensers are arranged, when the air conditioner refrigerates, the air conditioner adopts the water-cooled condensers for heat dissipation, and the water tank can absorb the heat dissipation of the water-cooled condensers, so that the effect of heating household water is achieved; after the hot water reaches the set temperature, the air conditioner adopts an air-cooled condenser to dissipate heat, and the normal operation of the air conditioner is ensured under the condition of cutting off the heating of the water tank. The household hot water system provided by the invention effectively utilizes the heat dissipation of the air conditioner, and achieves the effects of energy conservation and emission reduction.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a home hot water system provided by the present invention;

FIG. 2 is a schematic flow chart of a method for controlling a domestic hot water system according to the present invention;

fig. 3 is a schematic structural diagram of an electronic device provided in the present invention.

Reference numerals:

1: a processor; 2: a communication interface; 3: a memory;

4: a communication bus.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The home hot water system and the control method thereof of the present invention will be described with reference to fig. 1 to 3.

Referring to fig. 1, the present invention provides a household hot water system, it should be noted that, in some tropical or subtropical regions, the air temperature is high all the year round, and a single-mode air conditioner is provided in the market for these regions, that is, the air conditioner only has a cooling mode, and the household hot water system provided by the present invention is also based on the air conditioner.

Specifically, the home hot water system includes: the water heater comprises a water tank and an electric heating device arranged in the water tank, wherein the electric heating device is used for heating water in the water tank; the single-mode air conditioner only has a refrigeration mode, and comprises an evaporator, a compressor and a condenser which are sequentially connected in series, wherein the condenser comprises a water-cooled condenser and an air-cooled condenser which are connected in parallel, the water-cooled condenser is arranged in the water tank, and the air-cooled condenser is arranged outdoors. It should be noted that, in the technical solution provided by the present invention, the air conditioner only has a cooling mode, so the condenser only has a heat radiation condition. The water-cooled condenser is arranged in the water tank, and utilizes the water in the water tank to carry out heat exchange, and the air-cooled condenser is arranged outdoors, and like the condenser in the traditional technology, utilizes the air to carry out heat exchange. According to the technical scheme provided by the invention, different water-cooled condensers and air-cooled condensers are arranged, when the air conditioner is used for refrigeration, the water-cooled condensers are adopted for heat dissipation of the air conditioner, and the water tank can absorb the heat dissipation of the water-cooled condensers, so that the effect of heating household water is achieved; after the hot water reaches the set temperature, the air conditioner adopts the air-cooled condenser to dissipate heat, the normal operation of the air conditioner is ensured under the condition of cutting off the heating of the water tank, and the household hot water system effectively utilizes the heat dissipation of the air conditioner, thereby achieving the effects of energy conservation and emission reduction.

Further, due to the switching of the lines, when hot water needs to be heated, the compressor needs to be communicated with the water-cooled condenser, and when hot water does not need to be heated, the compressor is communicated with the air-cooled condenser. The electronic three-way valve has three contacts, one is communicated with the compressor, one is communicated with the water-cooled condenser, and the other is communicated with the air-cooled condenser; two loops are formed, one is a compressor communicated water-cooled condenser, and the other is a compressor communicated air-cooled condenser.

Furthermore, since the temperature of the household hot water should not exceed 75 ℃, in the technical solution provided by the present invention, the temperature of the system also needs to be monitored. Therefore, the household hot water system further comprises a temperature detection device, the temperature detection device comprises a first temperature detection structure and a second temperature detection structure, the first temperature detection structure is arranged in the water tank and used for detecting the temperature of water in the water tank, and the second temperature detection structure is arranged on the compressor and used for detecting the exhaust temperature of the top cover of the compressor. It should be noted that the discharge temperature of the top cover of the compressor is close to the temperature of the condenser, and in general, the temperature difference between the condenser and the hot water should be kept above 10 ℃ in order to ensure good heat exchange efficiency. Through the top cap exhaust temperature and the water tank temperature that detect the compressor, guarantee on the one hand that the water tank temperature is in the temperature range that the user predetermines, on the other hand is through the temperature difference between two temperatures of control, can in time increase temperature difference between them through adjusting compressor power when temperature difference between them is less, reaches good heat transfer effect.

In the technical scheme provided by the invention, the refrigerant flow comprises two loops, and in order to prevent the refrigerant from streaming between the two condensers, the water-cooled condenser and the air-cooled condenser both comprise a refrigerant inlet and a refrigerant outlet, and each refrigerant outlet is provided with a check valve. Furthermore, because the water-cooled condenser is arranged in the water tank and is directly contacted with the water tank, in order to prevent the condenser from being corroded after being soaked in water for a long time, the heat exchange tubes and the radiating fins of the condenser are coated with Teflon anti-corrosion layers.

Based on the household hot water system, the invention also provides a control method of the household hot water system, which comprises the following steps:

s10, acquiring the working state of the air conditioner;

s20, if the air conditioner is in a working state, communicating the evaporator, the compressor and the water-cooled condenser;

s30, acquiring the temperature of the water tank set by the user;

s40, acquiring the actual water tank temperature once every preset time interval;

s50, if the actual water tank temperature exceeds the set water tank temperature, communicating the evaporator, the compressor and the air cooler condenser;

and S60, if the air conditioner is in the off state, turning on the electric heating device of the water heater.

As described above, the air conditioner provided by the present invention is a single mode air conditioner, and performs only a cooling mode. Because in daily life, need always be equipped with hot water at home, consequently when the air conditioner work, the temperature that the water absorption condenser in the water tank gived off heats, and the air conditioner is when not working, and the water in the water tank relies on the heating device of water heater self to heat. Specifically, if the air conditioner is in a working state, heat is dissipated by the water-cooled condenser, and a refrigerant passes through a loop formed by the evaporator, the compressor and the water-cooled condenser. In the working process of the air conditioner, the water temperature can be continuously increased, and generally, the water temperature can be increased to the temperature set by a user and is not continuously increased. Therefore, in the technical scheme provided by the invention, the water tank temperature set by a user can be obtained, and if the actual water tank temperature exceeds the set water tank temperature, the heating source needs to be closed, namely, the refrigerant circulation loop is switched, and the air-cooled condenser is used for radiating heat of the air conditioner. When the air conditioner is not started, the water in the water tank is heated by using an electric heating device carried by the water heater.

Since the air conditioner is not in a normally open state, the user may select to turn off the air conditioner when the indoor temperature drops to a certain degree. In the technical solution provided by the present invention, before S50, "if the actual water tank temperature exceeds the set water tank temperature, the method further includes:

s41, acquiring the working state of the air conditioner once every preset time;

and S42, if the air conditioner is in a closed state and the actual water tank temperature is lower than the set water tank temperature, turning on an electric heating device of the water heater.

It should be noted that, the hot water in the water heater needs to be guaranteed within a certain temperature interval, and if the hot water in the water heater does not reach the required temperature and the air conditioner is in the off state at this time, the electric heating device of the water heater needs to be turned on to heat the water, so as to prevent the situation that the hot water temperature is insufficient.

Further, after S42, "turning on the electric heating device of the water heater", the method further includes:

s43, acquiring the actual water tank temperature once every preset time interval;

and S44, if the actual water tank temperature exceeds the set water tank temperature, closing the electric heating device.

As mentioned above, the hot water temperature in the water heater is not suitable to exceed 75 ℃, and generally the temperature set by the user is the standard, and if the temperature is not set by the user, the heating temperature is 75 ℃. Similar to the step of heating water by using a water-cooled condenser, after the temperature of the hot water exceeds the set temperature, the electric heating device needs to be closed, so that the water temperature is prevented from exceeding the upper limit of the temperature of the water heater.

According to the control method of the household hot water system provided by the invention, after the step of S40, acquiring the actual water tank temperature once every preset time interval, the method further comprises the following steps:

s45, acquiring the temperature of the air outlet of the primary compressor at intervals of preset time;

s46, calculating a first temperature difference value between the actual water tank temperature and the compressor air outlet temperature;

s47, acquiring the actual temperature and the set temperature of the air conditioner;

s48, calculating a second temperature difference value of the actual temperature of the air conditioner and the set temperature;

and S49, adjusting the power of the compressor according to the first temperature difference and the second temperature difference.

As mentioned above, the discharge temperature of the compressor top cover is similar to the condenser temperature, and the temperature difference between the water in the water-cooled condenser and the water in the water tank determines the heat exchange efficiency between the water-cooled condenser and the water in the water tank, and is generally the best temperature above 10 ℃. The temperature difference between the air conditioner and the air conditioner is sometimes small due to the influence of environmental factors and the influence of air conditioner parameters set by a user, and the improvement of the water temperature is not facilitated at the moment. If the temperature difference between the condenser and the condenser needs to be increased, the power of the compressor can be increased, and the heat dissipation temperature of the condenser can be increased under the general condition. However, the power of the compressor needs to be increased in consideration of the comparison between the indoor air temperature and the air-conditioning set temperature, and if the room temperature reaches the air-conditioning set temperature, the power of the compressor is increased again, which inevitably causes the temperature to continuously decrease, causing discomfort to the user. Therefore, in the technical scheme provided by the invention, the temperature of the air outlet of the compressor is obtained once every preset time, a first temperature difference value between the actual temperature of the water tank and the temperature of the air outlet of the compressor is calculated, the actual temperature and the set temperature of the air conditioner are obtained, and a second temperature difference value between the actual temperature and the set temperature of the air conditioner is calculated; and adjusting the power of the compressor according to the first temperature difference and the second temperature difference. So set up, both satisfied heat exchange efficiency's requirement, do not influence user's air conditioner again and use and experience.

Further, S49, adjusting the power of the compressor according to the first temperature difference and the second temperature difference includes:

s491, if the first temperature difference is smaller than the first preset value and the second temperature difference is greater than the second preset value, increasing the power of the compressor.

It can be understood that the first preset value can be set to 10, and when the first temperature difference is less than 10, i.e. the heat exchange efficiency is low, the adjustment of the compressor power needs to be considered. At this time, if the second efficiency is greater than the first preset value, the first preset value can be set to 3-5, and the difference between the actual temperature and the set temperature of the air conditioner is larger, so that the power of the compressor can be improved on the premise of not influencing the user experience.

The present invention also provides an electronic device, fig. 3 illustrates an entity structure diagram of the electronic device, and as shown in fig. 3, the electronic device may include: the system comprises a processor (processor)1, a communication Interface (communication Interface)2, a memory (memory)3 and a communication bus 4, wherein the processor 1, the communication Interface 2 and the memory 3 complete mutual communication through the communication bus 4. The processor 1 may call logic instructions in the memory 3 to perform a home hot water system control method comprising:

s10, acquiring the working state of the air conditioner;

s20, if the air conditioner is in a working state, communicating the evaporator, the compressor and the water-cooled condenser;

s30, acquiring the temperature of the water tank set by the user;

s40, acquiring the actual water tank temperature once every preset time interval;

s50, if the actual water tank temperature exceeds the set water tank temperature, communicating the evaporator, the compressor and the air cooler condenser;

and S60, if the air conditioner is in the off state, turning on the electric heating device of the water heater.

In addition, the logic instructions in the memory 3 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the home water heating system control method provided above, the method comprising:

s10, acquiring the working state of the air conditioner;

s20, if the air conditioner is in a working state, communicating the evaporator, the compressor and the water-cooled condenser;

s30, acquiring the temperature of the water tank set by the user;

s40, acquiring the actual water tank temperature once every preset time interval;

s50, if the actual water tank temperature exceeds the set water tank temperature, communicating the evaporator, the compressor and the air cooler condenser;

and S60, if the air conditioner is in the off state, turning on the electric heating device of the water heater.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.