阅读说明：本技术 一种具有除湿及热水功能的热泵空调 (Heat pump air conditioner with dehumidification and hot water function ) 是由 童风喜 鲁益军 赵序昌 童凌鹏 于 2021-09-03 设计创作，主要内容包括：一种具有除湿及热水功能的热泵空调,它包括热泵主机、供冷/热循环系统、若干个室内换热器、若干设在室内的除湿调温机和热水器主机,室内换热器、除湿调温机、热水器主机通过供回冷/热支管组和分集水器连通,室内换热器、除湿调温机和热水器主机都以供冷热循环系统中的循环水作为换热的冷源或热源。除湿调温机、热泵主机、供冷/热循环系统及室内换热器协同工作,热水主机和室内换热器、热泵主机联动工作。室内换热器和除湿调温机构成对室内空间进行制冷除湿或供暖的热交换系统,可以显著提升制冷时热泵主机的供水水温。利用室内换热器的散热面积和环境空气进行换热,把热水器制取热水时产生的冷量散发到环境中,从而得到较高的热水能效比。(A heat pump air conditioner with dehumidification and hot water functions comprises a heat pump host, a cold/heat supply circulation system, a plurality of indoor heat exchangers, a plurality of dehumidification temperature regulators and a water heater host which are arranged indoors, wherein the indoor heat exchangers, the dehumidification temperature regulators and the water heater host are communicated with a water collecting and distributing device through cold/heat supply branch pipes, and the indoor heat exchangers, the dehumidification temperature regulators and the water heater host use circulating water in the cold/heat supply circulation system as cold sources or heat sources for heat exchange. The dehumidification temperature regulator, the heat pump host, the cold/heat supply circulating system and the indoor heat exchanger work cooperatively, and the hot water host, the indoor heat exchanger and the heat pump host work in a linkage manner. The heat exchange system for refrigerating and dehumidifying or heating the indoor space by the indoor heat exchanger and the dehumidification and temperature regulation mechanism can obviously improve the water supply temperature of the heat pump host during refrigeration. The heat dissipation area of the indoor heat exchanger and the ambient air are utilized for heat exchange, and the cold energy generated when the water heater prepares hot water is dissipated to the environment, so that the high hot water energy efficiency ratio is obtained.)

1. The utility model provides a heat pump air conditioner with dehumidification and hot water function which characterized in that: it comprises a heat pump host, a cold/heat supply circulating system, a plurality of indoor heat exchangers, a plurality of dehumidification temperature regulators and a water heater host which are arranged indoors,

the heat pump host comprises a compressor, a first heat exchanger, a fan, a second heat exchanger, a four-way valve and an expansion valve, the cold/heat supply circulating system comprises a cold/heat supply pipeline, a cold/heat return pipeline, a water collecting and collecting device, a circulating water pump and a third heat exchanger, and the second heat exchanger and the third heat exchanger are coupled into a first double-runner heat exchanger; the water collecting and distributing device is provided with a plurality of cold/hot supply branch pipes and a plurality of cold/hot return branch pipes, and a cold/hot supply branch pipe and a cold/hot return branch pipe which are correspondingly communicated form a cold/hot return branch pipe group; the water heater main machine comprises a shell, a compressor, an expansion valve, an evaporator, a fourth heat exchanger, an inner container, a condenser arranged in the inner container, a water supply pipeline communicated with the inner container and a hot water outlet pipeline of a user, wherein the evaporator and the fourth heat exchanger are coupled into a second double-flow-channel heat exchanger, a water supply pipe connected with the fourth heat exchanger and a cold/hot supply branch pipe, a water return source pipe connected with the fourth heat exchanger and a cold/hot return branch pipe, and a temperature sensor arranged on the water return source pipe;

the indoor heat exchanger, the dehumidification temperature regulator and the water heater host are communicated with the water collecting and distributing device through a cold/heat supply/return branch pipe group, and the indoor heat exchanger, the dehumidification temperature regulator and the water heater host all use circulating water in a cold and heat supply circulating system as a cold source or a heat source for heat exchange;

the dehumidification temperature regulator, the heat pump host, the cold/heat supply circulating system and the indoor heat exchanger work cooperatively, and the hot water host, the indoor heat exchanger and the heat pump host work in a linkage manner.

2. The heat pump air conditioner with dehumidification and hot water functions as claimed in claim 1, wherein: the dehumidification temperature regulator comprises a cabinet body, a fifth heat exchanger, an indoor condenser, an indoor compressor, an indoor evaporator, an indoor fan, an indoor expansion valve and a water pan are arranged in the cabinet body, the indoor double-flow-channel heat exchanger formed by coupling the fifth heat exchanger and the indoor condenser is arranged below the indoor evaporator, and the water pan is arranged below the indoor evaporator; the indoor double-channel heat exchanger is connected with the indoor heat exchanger in series.

3. The heat pump air conditioner with dehumidification and hot water functions as claimed in claim 2, wherein: an air inlet and an air outlet are formed on the cabinet body, and the air inlet and the air outlet are communicated to form a circulation loop;

the air outlet with the air exit of indoor fan is corresponding, indoor evaporimeter set up in the income wind gap of indoor fan, the air outlet set up in the air exit of indoor fan.

4. The heat pump air conditioner with dehumidification and hot water functions as claimed in claim 2, wherein: the heat pump host further comprises a main controller, a cold/heat supply temperature sensor is arranged on the cold/heat supply pipeline, an indoor temperature and humidity controller is arranged indoors, and the main controller is respectively connected with the compressor, the cold/heat supply temperature sensor and the indoor temperature and humidity controller;

the indoor temperature and humidity controller is used for acquiring indoor temperature and humidity signals or dew point temperature and sending the temperature and humidity signals to the main controller, and the main controller is used for acquiring the indoor dew point temperature according to the temperature and humidity signals;

the cold/hot supply temperature sensor is used for acquiring cold/hot supply temperature on the cold/hot supply pipeline and sending the cold/hot supply temperature to the main controller;

the main controller is used for controlling the operation parameters of the compressor, so that the cooling/heating temperature is higher than the dew point temperature.

5. The heat pump air conditioner with dehumidification and hot water functions as claimed in claim 2, wherein: the dehumidification thermoregulator also comprises an indoor four-way valve.

6. The heat pump air conditioner with dehumidification and hot water functions as claimed in claim 1, wherein: the water heater main machine shell comprises an inner container cavity and a device cavity,

the hot water inner container is arranged in the inner container cavity, and the compressor and the second double-flow-channel heat exchanger are arranged in the device cavity.

7. The heat pump air conditioner with dehumidification and hot water functions as claimed in claim 1 or 4, wherein: and the temperature sensor on the water return source pipe of the water heater host transmits the detected water temperature in the water return source pipe to the main controller of the heat pump host, and the main controller is used for controlling the operation parameters of the compressor so that the water temperature in the water return source pipe is higher than the dew point temperature.

8. The heat pump air conditioner with dehumidification and hot water functions as claimed in claim 1 or 4, wherein: the cold/hot supply branch pipe, the cold/hot return branch pipe, the water supply pipe and the water return source pipe do not need an insulating layer in the installation and use processes.

9. The heat pump air conditioner with dehumidification and hot water functions as claimed in any one of claims 1 to 6, wherein: the medium refrigerant or water in the cooling/heating circulation system transfers energy.

Technical Field

The present invention relates to a heat pump air conditioner.

Background

In the prior art, the Chinese patent application 201811556478.7, the name of the invention is: a frequency conversion multi-connection radiation central air-conditioning hot water unit. The frequency conversion multi-connection radiation central air-conditioning hot water unit comprises an outdoor unit and an indoor unit, wherein the outdoor unit and the indoor unit are connected through three refrigerant copper pipes of a steam pipe, a liquid pipe and a high-low pressure pipe, and the number of the indoor unit and the number of the outdoor unit can be one or more. There are problems in that: the heat pump has the advantages of large number of heat pump hosts, multiple pipelines, complex distribution, large load of the heat pump hosts and frequent starting.

Disclosure of Invention

The purpose of the invention is: the heat pump air conditioner with the functions of dehumidification and water heating has the characteristics of small heat pump load, synergy of the dehumidification temperature regulator and the heat pump, and coupling synergy of the water heater main machine and the heat pump main machine.

The invention is realized by the following steps: a heat pump air conditioner with dehumidification and hot water function, its special character lies in: it comprises a heat pump host, a cold/heat supply circulating system, a plurality of indoor heat exchangers, a plurality of dehumidification temperature regulators and a water heater host which are arranged indoors,

the heat pump host comprises a compressor, a first heat exchanger, a fan, a second heat exchanger, a four-way valve and an expansion valve, the cold/heat supply circulating system comprises a cold/heat supply pipeline, a cold/heat return pipeline, a water collecting and collecting device, a circulating water pump and a third heat exchanger, and the second heat exchanger and the third heat exchanger are coupled into a first double-runner heat exchanger; the water collecting and distributing device is provided with a plurality of cold/hot supply branch pipes and a plurality of cold/hot return branch pipes, and a cold/hot supply branch pipe and a cold/hot return branch pipe which are correspondingly communicated form a cold/hot return branch pipe group; the water heater main machine comprises a shell, a compressor, an expansion valve, an evaporator, a fourth heat exchanger, an inner container, a condenser arranged in the inner container, a water supply pipeline communicated with the inner container and a hot water outlet pipeline of a user, wherein the evaporator and the fourth heat exchanger are coupled into a second double-flow-channel heat exchanger, a water supply pipe connected with the fourth heat exchanger and a cold/hot supply branch pipe, a water return source pipe connected with the fourth heat exchanger and a cold/hot return branch pipe, and a temperature sensor arranged on the water return source pipe;

the indoor heat exchanger, the dehumidification temperature regulator and the water heater host are communicated with the water collecting and distributing device through the cold/heat supply branch pipe group, and the indoor heat exchanger, the dehumidification temperature regulator and the water heater host all use circulating water in the cold/heat supply circulating system as a cold source or a heat source for heat exchange.

The dehumidification temperature regulator, the heat pump host, the cold/heat supply circulating system and the indoor heat exchanger work cooperatively, and the hot water host, the indoor heat exchanger and the heat pump host work in a linkage manner.

The heat pump air conditioner with dehumidification and hot water functions is characterized in that: the dehumidification temperature regulator comprises a cabinet body, a fifth heat exchanger, an indoor condenser, an indoor compressor, an indoor evaporator, an indoor fan, an indoor expansion valve and a water pan are arranged in the cabinet body, the indoor double-flow-channel heat exchanger formed by coupling the fifth heat exchanger and the indoor condenser is arranged below the indoor evaporator, and the water pan is arranged below the indoor evaporator; the indoor double-channel heat exchanger is connected with the indoor heat exchanger in series.

The heat pump air conditioner with dehumidification and hot water functions is characterized in that: an air inlet and an air outlet are formed on the cabinet body, and the air inlet and the air outlet are communicated to form a circulation loop;

the air outlet with the air exit of indoor fan is corresponding, indoor evaporimeter set up in the income wind gap of indoor fan, the air outlet set up in the air exit of indoor fan.

The heat pump air conditioner with dehumidification and hot water functions is characterized in that: the heat pump host further comprises a main controller, a cold/heat supply temperature sensor is arranged on the cold/heat supply pipeline, an indoor temperature and humidity controller is arranged indoors, and the main controller is respectively connected with the compressor, the cold/heat supply temperature sensor and the indoor temperature and humidity controller;

the indoor temperature and humidity controller is used for acquiring indoor temperature and humidity signals or dew point temperature and sending the temperature and humidity signals to the main controller, and the main controller is used for acquiring the indoor dew point temperature according to the temperature and humidity signals;

the cold/hot supply temperature sensor is used for acquiring cold/hot supply temperature on the cold/hot supply pipeline and sending the cold/hot supply temperature to the main controller;

the main controller is used for controlling the operation parameters of the compressor, so that the cooling/heating temperature is higher than the dew point temperature.

The heat pump air conditioner with dehumidification and hot water functions is characterized in that: the dehumidification thermoregulator also comprises an indoor four-way valve.

The heat pump air conditioner with dehumidification and hot water functions is characterized in that: the water heater main machine shell comprises an inner container cavity and a device cavity,

the hot water inner container is arranged in the inner container cavity, and the compressor and the second double-flow-channel heat exchanger are arranged in the device cavity.

The heat pump air conditioner with dehumidification and hot water functions is characterized in that: and the temperature sensor on the water return source pipe of the water heater host transmits the detected water temperature in the water return source pipe to the main controller of the heat pump host, and the main controller is used for controlling the operation parameters of the compressor so that the water temperature in the water return source pipe is higher than the dew point temperature.

The heat pump air conditioner with dehumidification and hot water functions is characterized in that: the cold/hot supply branch pipe, the cold/hot return branch pipe, the water supply pipe and the water return source pipe do not need an insulating layer in the installation and use processes.

The heat pump air conditioner with dehumidification and hot water functions is characterized in that: the medium refrigerant or water in the cooling/heating circulation system transfers energy.

According to the heat pump air conditioner with the dehumidification and hot water functions, the dehumidification temperature regulator and the heat pump host are synchronously cooperated, and the indoor heat exchanger and the dehumidification temperature regulating mechanism refrigerate and dehumidify or heat the indoor space, so that the water supply temperature of the heat pump host during refrigeration can be obviously increased, or the water supply temperature of the heat pump host during heating can be reduced, the energy efficiency ratio of the heat pump host is increased, and the energy saving of the system is achieved; the water heater main machine is coupled on the cold and heat supply circulating system and linked with the indoor heat exchanger and the heat pump main machine, free refrigerating capacity is added to the heat pump main machine when the water heater main machine prepares hot water in summer, energy is saved obviously, heat exchange is carried out by utilizing the heat dissipation area of the indoor heat exchanger and ambient air in spring and autumn, and cold generated when the water heater prepares hot water is dissipated to the environment, so that higher hot water energy efficiency ratio is obtained. Because of adopting such structure and control, the cold/hot branch pipe group, the water supply pipe and the return water source pipe which are arranged indoors do not need heat preservation, the whole system is simple to install and convenient to use, saves the installation space and saves energy in operation.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic diagram of the structure of the dehumidifying and temperature-regulating machine of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in figure 1, the heat pump air conditioner with dehumidification and hot water functions comprises a heat pump main machine 1, a cold/heat supply circulation system 2, a plurality of indoor heat exchangers 3, a plurality of dehumidification temperature regulators 4 arranged in the indoor and a water heater main machine 5,

the heat pump host 1 comprises a compressor 11, a first heat exchanger 12, a fan 13, a second heat exchanger, a four-way valve 14 and an expansion valve 15; the cooling/heating circulation system 2 comprises a cooling/heating pipeline 21, a cold/heating return pipeline 22, a water dividing and collecting device 23, a circulating water pump 24, a buffer water tank 25 and a third heat exchanger; the second heat exchanger and the third heat exchanger are coupled to form a first double-runner heat exchanger 61, and the first double-runner heat exchanger 61 is arranged in the heat pump main machine 1; the water collecting and distributing device 23 is provided with a plurality of cold/hot supply branch pipes and a plurality of cold/hot return branch pipes, and a cold/hot supply branch pipe and a cold/hot return branch pipe which are correspondingly communicated form a cold/hot return branch pipe group 28; the cold supply/heat pipeline 21 and the cold return/heat pipeline 22 are provided with stop valves 27;

the water heater main machine 5 comprises a shell 51, a compressor 52, an expansion valve 53, an evaporator, a fourth heat exchanger, an inner container 54, a condenser 55 arranged in the inner container, a water supply pipeline 56 communicated with the inner container, a user hot water outlet pipeline 57, a water supply source pipe 66, a water return source pipe 65 and a temperature sensor 64 arranged on the water return source pipe; the evaporator and the fourth heat exchanger are coupled to form a second double-flow-channel heat exchanger 63, and the second double-flow-channel heat exchanger 63 is arranged in the shell 51 of the water heater main unit 5; the water heater main unit 5 is communicated with a cold/hot supply branch pipe group 28 through a second double-flow-passage heat exchanger 63;

the indoor heat exchanger 3 is connected with the dehumidification temperature regulator 4 in series and then is communicated with a cold/heat supply branch pipe group 28; the dehumidification temperature regulator 4, the heat pump host 1, the cold/heat supply circulating system 2 and the indoor heat exchanger 3 work cooperatively;

the dehumidification temperature regulator 4 comprises a cabinet body 49 (see fig. 2), and a fifth heat exchanger, an indoor condenser, an indoor compressor 41, an indoor evaporator 42, an indoor fan 43, an indoor expansion valve 44 and a water pan 45 are arranged in the cabinet body; an indoor double-channel heat exchanger 62 formed by coupling the fifth heat exchanger and the indoor condenser is communicated with the water collecting and distributing device 23 through a water inlet interface 50 and a water outlet interface 51; the water pan 45 is arranged below the indoor evaporator 42; the indoor double-channel heat exchanger 62 is connected with the indoor heat exchanger 3 in series and is connected to the water collecting and distributing device 23 through a cold/hot supply branch pipe group 28; or the dehumidification thermoregulator is directly communicated with a cold/hot branch pipe set 28 through the indoor double-flow heat exchanger 62, and the indoor heat exchanger 3 is directly communicated with another cold/hot branch pipe set 28; the dehumidification temperature regulator 4 and the indoor heat exchanger 3 are positioned in the same air-conditioning space. The dehumidification and thermoregulation machine 4 further comprises an indoor four-way valve 46.

An air inlet 47 and an air outlet 48 are formed on the cabinet body 49, and the air inlet 47 is communicated with the air outlet 48 to form a circulation loop;

the air outlet 48 corresponds to the air outlet of the indoor fan 43, the indoor evaporator 42 is arranged at the air inlet of the indoor fan 43, and the air outlet 48 is arranged at the air outlet of the indoor fan 43.

As a further improvement of the invention: the heat pump host 1 further comprises a main controller 16, a cold/hot temperature sensor 26 is arranged on the cold/hot pipeline, an indoor temperature and humidity controller 7 is arranged indoors, and the main controller 16 is respectively connected with the compressor 11, the cold/hot temperature sensor 26 and the indoor temperature and humidity controller 7; the indoor temperature and humidity controller 7 is communicated with the main controller 16 through the wireless transmission module 8;

the indoor temperature and humidity controller 7 is used for acquiring indoor temperature and humidity signals or dew point temperature and sending the temperature and humidity signals to the main controller, and the main controller 16 is used for acquiring the indoor dew point temperature according to the temperature and humidity signals;

the cooling/heating temperature sensor 26 is used for acquiring the cooling/heating temperature on the cooling/heating pipeline and sending the cooling/heating temperature to the main controller 16;

the main controller 16 is used to control the operating parameters of the compressor so that the cooling/heating temperature is above the dew point temperature.

The housing 51 includes a liner chamber and a device chamber,

the inner container 54 is provided in the inner container chamber, and the compressor 52, the second two-flow passage heat exchanger 63, and the expansion valve 53 are provided in the apparatus chamber.

The temperature sensor 64 on the return water source pipe 65 of the water heater main unit 5 transmits the detected water temperature in the return water source pipe to the main controller 16 of the heat pump main unit 1, and the main controller 16 is used for controlling the operation parameters of the compressor, so that the water temperature in the return water source pipe 65 is higher than the dew point temperature.

Because of the structure and control, the cold/hot supply branch pipe group 28, the water supply source pipe and the water return source pipe which are arranged indoors do not need heat preservation, the whole system is simple to install, the cold/hot supply branch pipe group can be pre-buried in a wall body, a ground or a ceiling, the hot water main machine has small volume and low noise compared with the traditional air source heat pump water heater without an outdoor machine, the whole system saves the installation space, the common indoor pipelines in the air conditioning industry have no risks of dewing, dripping, mildewing and the like caused by poor heat preservation or aging damage, and the heat pump main machine, the indoor heat exchanger, the dehumidification temperature regulator and the hot water main machine are connected into a cooperative whole through a cold and hot circulation system, the functions of refrigeration, dehumidification, heating and hot water are provided for the indoor space all the year around, the operation is energy-saving, the user is comfortable, and especially the functions of heating and hot water are compared with the traditional fuel coal mode, the carbon emission is greatly reduced. The working principle is further explained below in connection with the climate all the year round.

When the invention is in use, the water-saving device,

(I) summer: when the heat pump host 1 works in a refrigerating mode, the water heater host 5 has hot water demand, works to heat hot water, and simultaneously supplies cold quantity to water in the cold/heat supply circulating system 2 through an evaporator of the water heater host 5, and the addition of the cold quantity can reduce the working load of the heat pump host and is equivalent to that an air conditioning system obtains the cold quantity freely; at the moment, the water temperature of the cooling/heating circulation system 2 is higher than the dew point temperature of indoor air and is higher than 18 ℃ in most of the time, so that the main machine of the water heater can obtain stable and excellent working conditions and high energy efficiency ratio; when the dehumidification temperature regulator 4 works, the indoor evaporator 32 plays a role in dehumidification, and the indoor condenser enables heat energy to enter the cold/heat circulating system through the indoor double-channel heat exchanger and the cold/heat supply branch pipe set and radiate the heat energy to the environment through the heat pump main machine 1; the dehumidification function of the dehumidification thermoregulator ensures that the indoor heat exchanger 3 only needs to bear the sensible heat part of the indoor refrigeration load, so that radiation refrigeration or dry coil refrigeration can be adopted to improve the water supply temperature under the refrigeration working condition of the heat pump host, thereby improving the energy efficiency ratio of the heat pump host; when the whole system works, the power consumption of the heat pump main machine is the main power consumption, and the refrigeration energy efficiency ratio of the whole system is obviously improved by the improvement of the energy efficiency ratio of the heat pump main machine and the cooperative work of the hot water main machine;

(II) in winter: when the heat pump host 1 is in heating operation, the water heater host 5 has hot water demand, the water heater host 5 is in operation, the condenser 55 heats the water in the liner, and meanwhile, the cold energy is released to the water in the cold/heat circulation system 2 through the evaporator of the water heater host 5, and the addition of the cold energy increases the working load of the heat pump host 1; generally, for a fixed building space and system configuration, the heating capacity of the heat pump host 1 is surplus, and the load increased by the water heater host 5 is less than 6% compared with the heating load of the heat pump host 1, so that the system can sufficiently meet the user requirements under the condition, at the moment, the water temperature in the cold/heat circulating system 2 is higher and is more than 30 ℃ at most, the temperature of the evaporation side of the water heater host 5 is high, so that the energy efficiency ratio of hot water production is high, compared with an electric water heater and a gas water heater, the energy-saving effect is obvious, the heating capacity is large, the hot water production speed is high, the habit of large hot water consumption in winter of a user is met, and the defect that the hot water speed is slow when the air temperature of the air source water heater is lower in winter is avoided; the indoor heat exchanger 3 can be a radiation type heat exchanger such as a floor heating device, a convection type radiator such as a fan coil or a radiation convection type heat exchanger such as a radiator, for a user who intermittently heats, the floor heating device or the radiator has long starting response time, and the user can feel the increase of the indoor temperature only by waiting for a long time, at the moment, the heating function of the dehumidification temperature regulator can be started, the heating quantity of the indoor space is forcibly increased on the basis that the indoor heat exchanger radiates the indoor heat, the indoor heating speed is accelerated, the comfort level of the user is improved, and the energy waste caused by the fact that the user needs to start the heating device for a long time in advance is avoided; therefore, the heat pump host, the indoor heat exchanger, the hot water host and the dehumidification temperature regulator work cooperatively, the comfort level of a user is improved, and the energy is saved and the environment is protected!

(III) spring and autumn: when hot water is needed, the circulating water pump 24 is started, the water heater host 5 detects a 'backwater temperature sensor' of the water heater host and obtains indoor dew point temperature from the main controller 16 of the heat pump host 1, and when the temperature detected by the cold/heat supply temperature sensor 26 is higher than the dew point temperature, the water heater host 5 is started to supply hot water to the inner container and release cold energy to the cold/heat supply circulating system 2; at this time, (1) if the dehumidification thermoregulator 4 has the dehumidification demand, the dehumidification thermoregulator carries on the refrigeration and dehumidification, release the heat to the cooling/heat cycle system 2 at the same time, in this way, the heat that the heat exchanger 62 of the dehumidification thermoregulator releases, the cold quantity that the water heater host computer 5 releases and the heat exchange of heat exchanger 3 and indoor environment produces the cold quantity or heat, assemble to the cooling/heat cycle system 2, maintain the water temperature in the cooling/heat cycle system 2 at certain equilibrium temperature, if the temperature is not lower than the dew point temperature, the compressor of the heat pump host computer does not start to run; if the water temperature in the cooling/heating circulation system 2 is lower than the dew point temperature, a compressor of the heat pump host 1 is started, and the heat pump host 1 operates according to a heating working condition to ensure that the water temperature in the whole cooling/heating circulation system is always higher than the dew point temperature; (2) if the dehumidification temperature regulator 4 has no dehumidification requirement, the dehumidification temperature regulator does not work, the cold quantity released by the water heater host 5 and the heat generated by the heat exchanger 3 and the heat exchange of the indoor environment are converged into the cold/heat circulation system, the water temperature in the cold/heat circulation system 2 is maintained at a certain balance temperature, and if the temperature is not lower than the dew point temperature, the compressor of the heat pump host 1 is not started to operate; if the water temperature in the cooling/heating circulation system 2 is lower than the dew point temperature, a compressor of the heat pump host 1 is started, and the heat pump host 1 operates according to a heating working condition to ensure that the water temperature in the whole cooling/heating circulation system is always higher than the dew point temperature; therefore, in most cases of spring and autumn, the water heater main machine 5 can indirectly utilize the heat exchanger 3 to exchange heat with the environment, so that heat is supplied to the domestic hot water, compared with the case that the conventional air source heat pump water heater needs to exchange heat with outdoor ventilation, the noise of the water heater is reduced, the size is reduced, the installation is easy, and the energy efficiency ratio is higher.

What has been described above is merely a preferred embodiment of the present invention. It should be noted that a person skilled in the art could make several modifications and variations without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.