WO2020098263A1

WO2020098263A1 - Heat pump system having hot water preparation function and control method

Info

Publication number: WO2020098263A1
Application number: PCT/CN2019/090902
Authority: WO
Inventors: 刘玉君; 杨磊; 刘晓伟; 管祥华
Original assignee: 青岛经济技术开发区海尔热水器有限公司; 青岛海尔新能源电器有限公司
Priority date: 2018-11-14
Filing date: 2019-06-12
Publication date: 2020-05-22
Also published as: EP3882538A4; CN111189138A; EP3882538A1; EP3882538C0; EP3882538B1

Abstract

Disclosed in the present invention is a heat pump system that has a hot water preparation function. The heat pump system comprises a compressor, an indoor heat exchanger, a throttling device, and an outdoor heat exchanger connected by pipelines to form a circulation flow path. A first control device is provided on the circulation flow path so as to switch the flow direction of a refrigerant in circulation flow path. The indoor heat exchanger comprises a first heat exchanger for performing heat exchange on an indoor air flow and a second heat exchanger for performing heat exchange on a water tank of a water heater. A second control device is provided on the circulation flow path, so that the first heat exchanger or the second heat exchanger are independent of each other, or the first heat exchanger and the second heat exchanger jointly access the circulation flow path. Also disclosed is a control method for the heat pump system that has the hot water preparation function described above. When water stored in the water tank of the water heater is heated and an air conditioning system cools the indoor air flow, the refrigerant flowing out of the compressor first performs heat exchange with the water stored in the water tank of the heat pump to heat the water stored in the water tank, and then performs heat exchange with an outdoor air flow for condensation.

Description

Heat pump system with hot water making function and control method

Technical field

The invention belongs to the field of household appliances, in particular, it relates to a heat pump system with hot water production function, and also relates to a control method of the heat pump system with hot water production function.

Background technique

With the continuous improvement of people's living standards, it has become an important choice for people to improve their comfort needs by installing air-conditioning systems in living and indoor working environments to improve the comfort of living and working environments. Among them, due to the advantages of high efficiency, energy saving, easy installation and maintenance, etc., the air conditioner manufactured by the heat pump system is an important direction for the development of existing air conditioner technology. The existing heat pump system is generally composed of a compressor, an indoor heat exchanger, a throttling device, and an outdoor heat exchanger that are connected by a pipeline to form a circulation flow path. The refrigerant continuously flows in the circulation flow path and exchanges heat with the indoor air flow. Adjust the indoor temperature accordingly by heat exchange. At the same time, in order to achieve the dual purpose of heating and cooling the indoor temperature, it is common to set a control valve group on the circulation flow channel to adjust the refrigerant flow direction in the circulation flow channel accordingly, so as to achieve the dual effect of heating and cooling the indoor air flow.

However, the air-conditioning equipment formed by the heat pump system still has the following problems:

When the heat exchanger in the outdoor heat pump system works as a condenser, before the refrigerant flows through the outdoor heat exchanger for condensation treatment, the refrigerant before the condensation treatment will leave a large amount of heat. At present, the refrigerant is directly flowed through the outdoor heat exchanger for condensation treatment, and the residual heat remaining in the refrigerant before the condensation treatment is not collected, causing heat loss of the entire heat pump system.

In addition, during the operation of the heat pump system, due to the residual heat in the refrigerant before condensation treatment, the dew point temperature of the refrigerant is reduced, which makes it difficult for the refrigerant to generate condensate during the condensation treatment, and the condensation efficiency is low, which affects the operation efficiency of the entire heat pump system. 3. Increased energy consumption.

In view of this, the present invention is specifically proposed.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, and to provide a heat pump system with hot water making function to realize heating and cooling adjustment of the indoor temperature of the user's house and preparation of the hot water used by the user's house The purpose of integration; another purpose is to recover and reuse the residual heat in the refrigerant before condensation in the heat pump system, thereby achieving the effects of reducing energy consumption and improving efficiency.

In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

A heat pump system with a function of making hot water includes a compressor connected by a pipeline to form a circulation flow channel, an indoor heat exchanger, a throttling device, and an outdoor heat exchanger. A first control device is provided on the circulation flow channel In order to switch the flow direction of the refrigerant in the circulating flow channel; the indoor heat exchanger includes a first heat exchanger that exchanges heat with the indoor airflow and a second heat exchanger that exchanges heat with the water heater water tank. The second control device, so that the first heat exchanger alone, or the second heat exchanger alone, or the first heat exchanger and the second heat exchanger are connected together in the circulation channel.

Further, the circulation flow path is provided with a first four-way valve and a second four-way valve, the first four-way valve has four openings a, b, c, d, and the second four-way valve has four e, f, g, h Each opening is correspondingly connected to the corresponding component in the system through a corresponding pipeline to control the flow direction of the refrigerant in the circulation flow channel.

Further, the a port of the first four-way valve is connected to the compressor outlet through the pipeline, the b port is connected to the e port of the second four-way valve, the c port is connected to the compressor inlet through the pipeline, and the d port is connected to the first heat exchanger The first port is connected; the e port of the second four-way valve is connected to the b port of the first four-way valve, the f port is connected to the inlet of the second heat exchanger, and the g port is connected to the first through the fourth connection pipeline The pipeline connected between the port C of the four-way valve and the inlet of the compressor, the port h is connected to the outlet of the second heat exchanger through the second connection pipeline, and the port h is connected to the first port of outdoor heat exchange through the pipeline.

Further, the second port of the first heat exchanger is connected to the first port of the throttling device through the first connecting pipe, and the second port of the throttling device is connected to the second port of the outdoor heat exchanger through the pipe; third The connecting pipe communicates with the second connecting pipe via the first connecting pipe.

Further, the first connection pipeline, the second connection pipeline, the third connection pipeline, and the fourth connection pipeline are respectively provided with a first control valve, a second control valve, and a third control valve which control the connection and disconnection of the corresponding pipeline. The fourth control valve.

Further, the second control valve is provided between the intersection of the first connection pipe and the second connection pipe and the second four-way valve, and the third control valve is provided at the intersection of the first connection pipe and the third connection pipe with Between the first heat exchanger.

Another object of the present invention is to provide a control method for a heat pump system with hot water production function as described above. When the water stored in the water tank of the water heater is heated and the air conditioning system cools the indoor airflow, the compressor The refrigerant first exchanges heat with the water storage in the heat pump water tank, heats the water storage in the water tank, and then performs heat exchange with the outdoor airflow and performs condensation treatment.

Further, the heat pump system with hot water heating function has four modes, hot water heating mode, cooling heat recovery mode, cooling mode, and heating mode, respectively corresponding to the first heat exchanger alone and the first heat exchanger The second heat exchanger is shared with the second heat exchanger, the second heat exchanger is separate, and the second heat exchanger is separately connected to the circulation channel.

Further, in the heating mode and the cooling mode, the flow direction of the refrigerant in the circulation flow path is set oppositely.

Further, in the cooling heat recovery mode, the first heat exchanger is connected between the compressor outlet and the throttling device, and the second heat exchange is connected between the compressor inlet and the outdoor heat exchanger to make the refrigerant and the outdoor air flow heat Before the exchange and condensation treatment, heat exchange is performed with the water stored in the water tank, and the waste water in the refrigerant before condensation is used to heat the water stored in the water tank.

Further, when in the hot water mode, the refrigerant flows along the compressor outlet, the first four-way valve a port, the first four-way valve b port, the second four-way valve e port, the second four-way valve f port, the second heat Exchanger, throttling device, outdoor heat exchanger, second four-way valve h port, second four-way valve g port and compressor inlet flow; when in cooling heat recovery mode, the refrigerant along the compressor outlet, the first four Port a port, first four-way valve b port, second four-way valve e port, second four-way valve f port, second heat exchanger, outdoor heat exchanger, throttle device, first heat exchanger, The first four-way valve d port, the first four-way valve c port and the compressor inlet flow; when in heating mode, the refrigerant flows along the compressor outlet, the first four-way valve a port, the first four-way valve d port, The first heat exchanger, throttling device, outdoor heat exchanger, the second four-way valve h port, the second four-way valve g port and the compressor inlet flow; when in the cooling mode, the refrigerant flows along the compressor outlet, the first Four-way valve a port, first four-way valve b port, second four-way valve e port, second four-way valve h port, outdoor heat exchanger, throttle device, first heat exchanger, first four-way valve Port d, the first four-way valve c and the compressor inlet flow.

Further, in the hot water production mode, the first control valve on the circulation flow channel is opened, the second control valve is disconnected, the third control valve is disconnected, the fourth control valve is opened, and the a and b ports of the first four-way valve Are connected, the e port and f port of the second four-way valve are connected, and the g port and h port are connected; when in the cooling heat recovery mode, the first control valve on the circulation flow path is opened, the second control valve is opened, the first The three control valve is open, the fourth control valve is open, the first four-way valve is connected to port a and b, the c port is connected to port d, and the second four-way valve is connected to port e and f; In the hot mode, the first control valve on the circulation flow path is opened, the second control valve is opened, the third control valve is opened, and the fourth control valve is opened. The first four-way valve is connected to the a and d ports, the second The g port and the h port of the four-way valve are connected; when in the cooling mode, the first control valve on the circulation flow path is disconnected, the second control valve is disconnected, the third control valve is opened, the fourth control valve is disconnected, the first The port a and b of the four-way valve are connected, the port c and the d are connected, and the port e and h of the second four-way valve are connected.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

1. The present invention achieves the purposes of simultaneously integrating the functions of heating and cooling the indoor temperature of the user's house and preparing the hot water used in the user's house on a single system through the above-mentioned setting and control methods. The effect of regulating and / or integrating the heating preparation function of hot water used in the user's home.

2. In the process of cooling the indoor temperature, the compressed refrigerant flows through the water tank, heats the water stored in the water tank, and then enters the outdoor heat exchanger for condensation treatment, which realizes the condensation in the heat pump system. The waste heat in the refrigerant is used for the purpose of recovery and reuse, thereby achieving the effects of reducing energy consumption and improving efficiency.

The specific implementation of the present invention will be described in further detail below with reference to the drawings.

BRIEF DESCRIPTION

As a part of the present invention, the drawings are used to provide a further understanding of the present invention. The schematic embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation on the present invention. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

FIG. 1 is a schematic structural diagram of a heat pump system with hot water production function in an embodiment of the present invention.

The main components in the picture:

1—compressor, 2—first four-way valve, 3-—second four-way valve, 4-—second heat exchanger, 5-—first heat exchanger, 6—throttling device, 7—outdoor heat exchanger, 8—outdoor fan, 9—outdoor fan motor, 10—first control valve, 11—second control valve, 12—third control valve, 13—fourth control valve.

It should be noted that these drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to explain the concept of the present invention to those skilled in the art by referring to specific embodiments.

detailed description

To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention , But not to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, just to facilitate the description of the present invention and simplify the description, rather than to indicate or imply that the device or element referred to must have a specific orientation, a specific orientation The construction and operation cannot be understood as a limitation of the present invention.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable Connected, or connected integrally; either mechanically or electrically; directly or indirectly through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in FIG. 1, an embodiment of the present invention introduces a heat pump system with a function of making hot water, including a compressor 1, an indoor heat exchanger, a throttling device 6 The outdoor heat exchanger 7 is provided with a first control device on the circulation channel to switch the flow direction of the refrigerant in the circulation channel; the indoor heat exchanger includes a first heat exchanger 5 that exchanges heat with the indoor airflow and a water heater The second heat exchanger 4 for heat exchange of the water tank is provided with a second control device on the circulation flow path, so that the first heat exchanger 5 alone, or the second heat exchanger 4 alone, or the first heat exchanger 5 and the second heat exchanger 4 are connected into the circulation flow path together.

Through the above settings, the purpose of simultaneously integrating the functions of heating and cooling the indoor temperature of the user's house and preparing hot water for the user's house on a single system is achieved, and the indoor temperature of the user is regulated and / or the user is achieved The effect of the integrated setting of the heating preparation function used by the domestic hot water.

In the embodiment of the present invention, a first four-way valve 2 and a second four-way valve 3 are provided on the circulation flow path, the first four-way valve 2 has four openings a, b, c, and d, and the second four-way valve 3 has There are four openings e, f, g, h, and each opening is correspondingly connected to the corresponding component in the system via a corresponding pipeline to control the flow direction of the refrigerant in the circulation flow channel.

In the embodiment of the present invention, port a of the first four-way valve 2 is connected to the outlet of the compressor 1 via a pipeline, port b is connected to the port e of the second four-way valve 3, and port c is connected to the inlet of the compressor 1 via a pipeline. The port is connected to the first port of the first heat exchanger 5; the e port of the second four-way valve 3 is connected to the b port of the first four-way valve 2, and the f port is connected to the inlet of the second heat exchanger 4, The g port is connected to the first four-way valve c port and the inlet of the compressor 1 through the fourth connecting pipe, and the h port is connected to the outlet of the second heat exchanger 3 through the second connecting pipe, and The h port is connected to the first port of the outdoor heat exchange 7 via a pipeline.

In the embodiment of the present invention, the second port of the first heat exchanger 5 is connected to the first port of the throttle device 6 through the first connecting pipe, and the second port of the throttle device 6 is connected to the outdoor heat exchanger 7 through the pipe The second port is connected; the third connection pipe communicates with the second connection pipe via the first connection pipe.

In the embodiment of the present invention, the first connection pipeline, the second connection pipeline, the third connection pipeline, and the fourth connection pipeline are respectively provided with a first control valve 10 and a second control valve 11 which control the on-off of the corresponding pipeline 、 Third control valve 12 and fourth control valve 13.

In the embodiment of the present invention, the second control valve 11 is provided between the intersection of the first connecting pipe and the second connecting pipe and the second four-way valve 3, and the third control valve 12 is provided between the first connecting pipe and the second Between the junction of the three connecting pipes and the first heat exchanger 5.

In the embodiment of the present invention, the first heat exchanger 5 and the second heat exchanger 4 are both installed indoors of the user's house, and the outdoor heat exchanger 7, the throttle device 6, and the compressor 1 are all installed outdoors of the user's house; circulation The pipes that pass through the indoor and outdoor of the user's home in the flow channel are connected through a joint to realize the connection and assembly between the indoor and outdoor components of the entire system.

In the embodiment of the present invention, an outdoor fan 8 is installed at the outdoor heat exchanger 7, and the outdoor fan 8 is driven by the outdoor fan motor 9 to rotate to form an outdoor heat exchange air flow that flows outdoor air through the outdoor heat exchanger The heat exchange airflow exchanges heat with the refrigerant flowing through the outdoor heat exchanger. Similarly, an indoor fan is also provided in the interior of the user's home to form an indoor heat exchange airflow that flows indoor air through the first heat exchanger 5 to exchange the indoor heat exchange airflow and the refrigerant flowing through the first heat exchanger 5 Perform heat exchange.

In the embodiment of the present invention, the second heat exchanger 4 is a heat exchange pipe coiled on the outer wall of the water tank, and the heat exchange pipe is coiled from the top to the bottom of the water tank; the upper end of the heat exchange pipe is the second heat exchanger 4 The inlet and the lower end of the heat exchange pipe are the outlet of the second heat exchanger 4. The water tank is also provided with a water inlet into which water is supplied and a water outlet through which heated hot water flows out.

The embodiment of the present invention also provides a control method of the above heat pump system with hot water production function. When heating the water storage in the water tank of the water heater and the air conditioning system cooling the indoor airflow, the refrigerant flowing out of the compressor first contacts the heat pump The water storage in the water tank exchanges heat, heats the water stored in the water tank, and then performs heat exchange with the outdoor airflow and performs condensation treatment.

The invention realizes the condensation in the heat pump system by flowing the compressed refrigerant through the water tank, heating the water stored in the water tank and then entering the outdoor heat exchanger for condensation treatment in the process of cooling the indoor temperature The purpose of recovering and reusing waste heat from the previous refrigerant is to reduce energy consumption and increase efficiency.

In the embodiment of the present invention, the heat pump system with hot water production function has four modes, hot water production mode, cooling heat recovery mode, cooling mode, and heating mode, respectively corresponding to the A heat exchanger and a second heat exchanger are common, the second heat exchanger is separate, and the second heat exchanger is separately connected to the circulation channel.

In the embodiment of the present invention, in the heating mode and the cooling mode, the flow direction of the refrigerant in the circulation flow channel is set oppositely.

In the embodiment of the present invention, in the cooling heat recovery mode, the first heat exchanger is connected between the compressor outlet and the throttling device, and the second heat exchange is connected between the compressor inlet and the outdoor heat exchanger, so that the refrigerant Before heat exchange and condensation treatment with outdoor airflow, heat exchange with the water storage in the water tank, and use the residual heat in the refrigerant before condensation to heat the water storage in the water tank.

In the embodiment of the present invention, when the heat pump system with hot water production function is in hot water production mode, the refrigerant flows along the compressor outlet, the first four-way valve a, the first four-way valve b, and the second four-way Valve e port, second four-way valve f port, second heat exchanger, throttle device, outdoor heat exchanger, second four-way valve h port, second four-way valve g port and compressor inlet flow.

When the heat pump system with hot water generating function is in the cooling heat recovery mode, the refrigerant flows along the compressor outlet, the first four-way valve a port, the first four-way valve b port, the second four-way valve e port, the second The four-way valve f port, second heat exchanger, outdoor heat exchanger, throttle device, first heat exchanger, first four-way valve d port, first four-way valve c port and compressor inlet flow.

When the heat pump system with hot water heating function is in heating mode, the refrigerant flows along the compressor outlet, the first four-way valve a port, the first four-way valve d port, the first heat exchanger, the throttling device, outdoor The heat exchanger, the h port of the second four-way valve, the g port of the second four-way valve and the inlet of the compressor circulate.

When the heat pump system with hot water generating function is in the cooling mode, the refrigerant flows along the compressor outlet, the first four-way valve a, the first four-way valve b, the second four-way valve e, and the second four-way The valve h port, outdoor heat exchanger, throttle device, first heat exchanger, first four-way valve d port, first four-way valve c port and compressor inlet flow.

In the embodiment of the present invention, when the heat pump system with hot water production function is in hot water production mode, the first control valve on the circulation flow channel is opened, the second control valve is disconnected, the third control valve is disconnected, and the fourth The control valve is opened, the a port of the first four-way valve communicates with the b port, the e port of the second four-way valve communicates with the f port, and the g port communicates with the h port;

When the heat pump system with hot water production function is in the cooling heat recovery mode, the first control valve on the circulation flow path is opened, the second control valve is opened, the third control valve is opened, and the fourth control valve is opened. The port a and b of the four-way valve are in communication, port c and d are in communication, and port e and f of the second four-way valve are in communication;

When the heat pump system with the function of making hot water is in the heating mode, the first control valve on the circulation flow path is opened, the second control valve is opened, the third control valve is opened, the fourth control valve is opened, and the first four Port a and port d of the port valve are connected, port g and h port of the second four-way valve are connected;

When the heat pump system with hot water generating function is in the cooling mode, the first control valve on the circulation flow path is opened, the second control valve is opened, the third control valve is opened, the fourth control valve is opened, and the first four Ports a and b of the port valve are in communication, port c and d are in communication, and port e and h of the second four-way valve are in communication.

In the embodiment of the present invention, the specific control method of the heat pump system with hot water making function is as follows:

Step S1. The user selects the working mode;

Step S2. Perform heating mode, the first control valve on the circulation flow channel is opened, the second control valve is opened, the third control valve is opened, the fourth control valve is opened, and the a and d ports of the first four-way valve are connected The g port and the h port of the second four-way valve are connected; the refrigerant is along the compressor outlet, the first four-way valve a port, the first four-way valve d port, the first heat exchanger, the throttling device, outdoor heat The exchange, the second four-way valve h port, the second four-way valve g port and the compressor inlet flow;

Step S3. Perform the cooling mode to determine whether the user needs to prepare hot water, if so, perform step S5; if not, perform step S4;

Step S4. Perform a cooling mode that does not prepare hot water, the first control valve on the circulation flow path is opened, the second control valve is opened, the third control valve is opened, the fourth control valve is opened, and the first four-way valve a The port is connected to the port b, the port c is connected to the port d, the port e of the second four-way valve is connected to the port h; the refrigerant flows along the compressor outlet, the first four-way valve a, and the first four-way valve b , Second four-way valve e port, second four-way valve h port, outdoor heat exchanger, throttle device, first heat exchanger, first four-way valve d port, first four-way valve c port and compressor Import circulation;

Step S5. Perform the cooling and heat recovery mode, the first control valve on the circulation flow path is opened, the second control valve is opened, the third control valve is opened, the fourth control valve is opened, and the a and b ports of the first four-way valve Connected, port c and port d are connected, port e and port f of the second four-way valve are connected; the first heat exchanger is connected between the compressor outlet and the throttling device, and the second heat exchange is connected to the compressor Between the inlet and the outdoor heat exchanger, so that the refrigerant exchanges heat with the outdoor airflow before heat treatment and condensation, and the water stored in the water tank, and uses the residual heat in the refrigerant before condensation to heat the water stored in the water tank;

Step S6. When the hot water heating mode under the indoor cooling condition is not performed, the first control valve on the circulation flow channel is opened, the second control valve is disconnected, the third control valve is disconnected, the fourth control valve is opened, and the first four The port a and b are connected to the port, the second four-way valve is connected to the f and f ports, and the g port is connected to the h port; the refrigerant flows along the compressor outlet, the first four-way valve a port, the first four Port b, second four-port valve e, second four-port valve f, second heat exchanger, throttle device, outdoor heat exchanger, second four-port valve h, second four-port valve g The inlet and the compressor inlet flow cyclically.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed in the preferred embodiments as above, it is not intended to limit the present invention. Any technology familiar with this patent Personnel can use the technical content of the above tips to make some changes or modifications to equivalent embodiments without departing from the scope of the technical solution of the present invention, but any content that does not deviate from the technical solution of the present invention is based on the technology of the present invention In essence, any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the present invention.

Claims

A heat pump system with a function of making hot water includes a compressor connected by a pipeline to form a circulation flow channel, an indoor heat exchanger, a throttling device, and an outdoor heat exchanger. A first control device is provided on the circulation flow channel In order to switch the flow direction of the refrigerant in the circulating flow channel; the indoor heat exchanger includes a first heat exchanger that exchanges heat with the indoor airflow and a second heat exchanger that exchanges heat with the water heater water tank. The second control device, so that the first heat exchanger alone, or the second heat exchanger alone, or the first heat exchanger and the second heat exchanger are connected together in the circulation channel.
The heat pump system with the function of making hot water according to claim 1, characterized in that a first four-way valve and a second four-way valve are provided on the circulation flow channel, and the first four-way valve has a, b, The four openings of c and d, and the second four-way valve have four openings of e, f, g, and h, and each opening is correspondingly connected to the corresponding component in the system through a corresponding pipeline to control the flow direction of the refrigerant in the circulation flow path.
The heat pump system with the function of making hot water according to claim 2, characterized in that the a port of the first four-way valve is connected to the compressor outlet via a pipeline, and the b port is connected to the e-port of the second four-way valve Connected, port c is connected to the compressor inlet via a pipeline, and port d is connected to the first port of the first heat exchanger;

The e port of the second four-way valve is connected to the b port of the first four-way valve, the f port is connected to the inlet of the second heat exchanger, and the g port is connected to the c port of the first four-way valve through the fourth connection pipeline. The pipeline connected between the inlets of the compressor, the H port is connected to the outlet of the second heat exchanger through the second connection pipeline, and the H port is connected to the first port of the outdoor heat exchange through the pipeline.
A heat pump system with hot water production function according to claim 3, characterized in that the second port of the first heat exchanger is connected to the first port of the throttling device via the first connecting pipe The second port of the device is connected to the second port of the outdoor heat exchanger through the pipeline; the third connection pipeline is connected to the second connection pipeline through the first connection pipeline.
The heat pump system with the function of making hot water according to claim 4, characterized in that: the first connection pipeline, the second connection pipeline, the third connection pipeline, and the fourth connection pipeline are respectively provided with controls The first control valve, the second control valve, the third control valve and the fourth control valve corresponding to the on-off of the pipeline;

Preferably, the second control valve is provided between the intersection of the first connection pipe and the second connection pipe and the second four-way valve, and the third control valve is provided at the intersection of the first connection pipe and the third connection pipe Between the first heat exchanger.
A control method of a heat pump system with hot water making function according to any one of claims 1 to 5, characterized in that the compressor flows out when the water storage in the water heater tank is heated and the air conditioning system cools the indoor airflow The refrigerant first exchanges heat with the water storage in the heat pump water tank, heats the water storage in the water tank, and then performs heat exchange with the outdoor airflow and performs condensation treatment.
A control method according to claim 6, characterized in that it has four modes, hot water heating mode, cooling heat recovery mode, cooling mode, and heating mode, respectively corresponding to the The heat exchanger and the second heat exchanger are common, the second heat exchanger is separate, and the second heat exchanger is separately connected to the circulation channel;

Preferably, in the heating mode and the cooling mode, the flow direction of the refrigerant in the circulation flow channel is set oppositely.
A control method according to claim 7, wherein in the cooling heat recovery mode, the first heat exchanger is connected between the compressor outlet and the throttling device, and the second heat exchange is connected to the compressor inlet and Between the outdoor heat exchangers, the refrigerant is heat exchanged with the outdoor airflow before heat exchange and condensation treatment, and with the water stored in the water tank, and the residual heat in the refrigerant before condensation is used to heat the water stored in the water tank.
A control method according to claim 8, characterized in that:

When in hot water mode, the refrigerant flows along the compressor outlet, the first four-way valve a, the first four-way valve b, the second four-way valve e, the second four-way valve f, and the second heat exchanger , Throttling device, outdoor heat exchanger, second four-way valve h port, second four-way valve g port and compressor inlet flow;

When in cooling heat recovery mode, the refrigerant flows along the compressor outlet, the first four-way valve a, the first four-way valve b, the second four-way valve e, the second four-way valve f, and the second heat exchanger , Outdoor heat exchanger, throttling device, first heat exchanger, first four-way valve d port, first four-way valve c port and compressor inlet flow;

When in heating mode, the refrigerant flows along the compressor outlet, the first four-way valve a port, the first four-way valve d port, the first heat exchanger, the throttling device, the outdoor heat exchanger, the second four-way valve h port 2. The g-port of the second four-way valve and the inlet of the compressor are circulating;

When in cooling mode, the refrigerant flows along the compressor outlet, the first four-way valve a port, the first four-way valve b port, the second four-way valve e port, the second four-way valve h port, the outdoor heat exchanger, throttling The device, the first heat exchanger, the first four-way valve d port, the first four-way valve c port and the compressor inlet flow cyclically.
A control method according to claim 9, characterized in that:

When in hot water mode, the first control valve on the circulation flow channel is opened, the second control valve is disconnected, the third control valve is disconnected, the fourth control valve is opened, and the a and b ports of the first four-way valve are in communication , The e port and f port of the second four-way valve are connected, and the g port and h port are connected;

When in the cooling heat recovery mode, the first control valve on the circulation flow path is opened, the second control valve is opened, the third control valve is opened, the fourth control valve is opened, and the a and b ports of the first four-way valve are in communication , Port c and port d communicate, port e of the second four-way valve communicates with port f;

When in heating mode, the first control valve on the circulation flow path is disconnected, the second control valve is disconnected, the third control valve is opened, and the fourth control valve is opened, and the a and d ports of the first four-way valve are connected, The g port and the h port of the second four-way valve are connected;

When in cooling mode, the first control valve on the circulation flow path is disconnected, the second control valve is disconnected, the third control valve is opened, and the fourth control valve is disconnected. Port c and port d communicate, and port e of the second four-way valve communicates with port h.