WO2020034512A1

WO2020034512A1 - Hot water system for air conditioner

Info

Publication number: WO2020034512A1
Application number: PCT/CN2018/121529
Authority: WO
Inventors: 秦自强; 曾凡卓; 孟红武; 王晓红
Original assignee: 珠海格力电器股份有限公司
Priority date: 2018-08-13
Filing date: 2018-12-17
Publication date: 2020-02-20
Also published as: CN108917138A

Abstract

A hot water system for an air conditioner, comprising a refrigerant circulation system, wherein the refrigerant circulation system comprises a compressor (10) and an outdoor heat exchanger (20), and further comprises a refrigerant heat exchanger (30) and a water circulation system; the refrigerant heat exchanger (30) and the water circulation system are selectively disposed between the compressor (10) and the outdoor heat exchanger (20); and when the water circulation system is disposed between the compressor (10) and the outdoor heat exchanger (20), medium water in the water circulation system exchanges heat with refrigerant in the refrigerant circulation system. The present invention may effectively solve the problem in existing technology of an air conditioner system not being able to take into consideration the functions of rapid cooling and providing hot water.

Description

Air-conditioning hot water system

This application claims priority from a Chinese patent application filed with the Chinese Patent Office on August 13, 2018, with application number 201810918126.5, and the invention name is "air-conditioning hot water system", the entire contents of which are incorporated herein by reference.

Technical field

The invention relates to the technical field of air conditioning, and in particular to an air conditioning hot water system.

Background technique

In the prior art, a single terminal connection method of a commercial or domestic air-conditioning system cannot meet the requirements of using different terminal products in a specific occasion. For example, in the northern “media-to-electricity” project, the ends used by users are mostly radiators, floor heating and other water systems. Although a set of units solves the heating problem, when there is cooling demand in summer, additional fan coils are required, but The cooling speed and effect are not good; the end of the refrigerant system used in the refrigerant air conditioning system (fluorine machine) is the end of the fluorine system such as on-hook, cabinet, etc. Although the cooling effect is obvious, it cannot provide hot water as a heating unit and lacks a water system Comfort.

Summary of the Invention

An embodiment of the present invention provides an air-conditioning hot water system to solve the problem that the air-conditioning system in the prior art cannot take into account fast cooling and hot water functions.

To achieve the above object, the present invention provides an air-conditioning hot water system, including a refrigerant circulation system, the refrigerant circulation system includes a compressor and an outdoor heat exchanger, and further includes a refrigerant heat exchanger and a water circulation system, a refrigerant heat exchanger, and a water circulation system It is selectively set between the compressor and the outdoor heat exchanger. When the water circulation system is set between the compressor and the outdoor heat exchanger, the medium water in the water circulation system exchanges heat with the refrigerant in the refrigerant circulation system.

Further, the water circulation system includes a water heat exchanger. When the water circulation system is disposed between the compressor and the outdoor heat exchanger, the water heat exchanger is connected between the compressor and the outdoor heat exchanger, and the medium water in the water circulation system passes through. The water heat exchanger exchanges heat with the refrigerant in the refrigerant circulation system.

Further, it further comprises a first reversing device, the refrigerant heat exchanger is connected in parallel with the water circulation system, and the refrigerant heat exchanger or the water circulation system is connected between the compressor and the outdoor heat exchanger by switching the first reversing device.

Further, the first reversing device includes a first three-way valve and a second three-way valve. The three connecting ends of the first three-way valve are respectively connected to the outdoor heat exchanger, the water circulation system, and the refrigerant heat exchanger. The three connection ends of the pass valve are respectively connected to the refrigerant heat exchanger, the water circulation system and the compressor.

Further, it further includes a second reversing device, and the refrigerant circulation system is switched to a cooling state or a heating state by switching the second reversing device.

Further, the refrigerant heat exchanger is connected in parallel with the water circulation system, and the second reversing device is a four-way valve. The four connecting ends of the four-way valve are respectively connected to the outlet end of the compressor, the outdoor heat exchanger, the inlet end of the compressor, and The connection node between the refrigerant heat exchanger and the water circulation system near the compressor.

Further, the water circulation system includes a fan coil, and when the refrigerant circulation system is in a refrigerated state and the water circulation system is disposed between the compressor and the outdoor heat exchanger, the medium water in the water circulation system is first exchanged and cooled with the refrigerant in the refrigerant circulation system. Heat exchange and cooling of indoor air are performed by fan coils.

Further, the water circulation system includes a radiator or floor heating. When the refrigerant circulation system is in a heating state and the water circulation system is disposed between the compressor and the outdoor heat exchanger, the medium water in the water circulation system first exchanges heat with the refrigerant in the refrigerant circulation system. Heating, and then at least partly heat the indoor air through a corresponding radiator or floor heating.

Further, the water circulation system includes a water tank. When the refrigerant circulation system is in a heating state and the water circulation system is disposed between the compressor and the outdoor heat exchanger, the medium water in the water circulation system is first heat-exchanged with the refrigerant in the refrigerant circulation system and then heated. It flows into the water tank at least partially to provide hot water.

Further, the refrigerant circulation system further includes a gas-liquid separator and a throttling device. The gas-liquid separator is disposed at an inlet end of the compressor, and the throttling device is disposed on a side of the outdoor heat exchanger away from the compressor.

Applying the technical solution of the present invention, the air-conditioning hot water system includes a refrigerant heat exchanger and a water circulation system, and the refrigerant heat exchanger and the water circulation system are selectively disposed between the compressor and the outdoor heat exchanger. When the refrigerant heat exchanger is installed between the compressor and the outdoor heat exchanger, the compressor, outdoor heat exchanger, and refrigerant heat exchanger (indoor) form a loop. When the air-conditioning and hot water system is in a cooling state, the refrigerant heat exchange and cooling Fast speed and good cooling effect. When the water circulation system is set between the compressor and the outdoor heat exchanger, the medium water in the water circulation system exchanges heat with the refrigerant in the refrigerant circulation system, and the medium water in the water circulation system is heated when the air conditioning hot water system is in a heating state , Which can provide users with hot water. Therefore, the above-mentioned air conditioning and hot water system can not only rapidly cool, but also provide users with hot water during heating, taking into account both the cooling effect and the comfort in use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an air conditioning hot water system during cooling according to an embodiment of the present invention;

2 is a schematic diagram of a refrigerant flow when the air-conditioning hot water system of FIG. 1 is in a refrigerant cooling mode;

3 is a schematic diagram of a refrigerant flow when the air-conditioning hot water system of FIG. 1 is in a water cooling mode;

4 is a schematic structural diagram of an air conditioning hot water system during heating according to an embodiment of the present invention;

5 is a schematic diagram of a refrigerant flow when the air-conditioning hot water system of FIG. 4 is in a refrigerant heating mode; and

FIG. 6 is a schematic diagram of a refrigerant flow when the air-conditioning hot water system of FIG. 4 is in a water heating / heating mode.

Reference sign description:

10, compressor; 20, outdoor heat exchanger; 30, refrigerant heat exchanger; 40, water heat exchanger; 50, first three-way valve; 60, second three-way valve; 70, four-way valve; 80, Gas-liquid separator; 90. Throttling device.

detailed description

The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

As shown in FIGS. 1 and 4, according to an embodiment of the present invention, an air-conditioning hot water system is provided, including a refrigerant circulation system, and the refrigerant circulation system includes a compressor 10 and an outdoor heat exchanger 20. The air-conditioning hot water system further includes a refrigerant heat exchanger 30 and a water circulation system. The refrigerant heat exchanger 30 and the water circulation system are selectively disposed between the compressor 10 and the outdoor heat exchanger 20. When the water circulation system is disposed between the compressor 10 and the outdoor heat exchanger 20, the medium water in the water circulation system and the refrigerant in the refrigerant circulation system perform heat exchange.

The air conditioning hot water system of this embodiment is applied. The air conditioning hot water system includes a refrigerant heat exchanger 30 and a water circulation system. The refrigerant heat exchanger 30 and the water circulation system are selectively disposed between the compressor 10 and the outdoor heat exchanger 20. When the refrigerant heat exchanger 30 is disposed between the compressor 10 and the outdoor heat exchanger 20, the compressor 10, the outdoor heat exchanger 20, and the refrigerant heat exchanger 30 (indoor) form a circuit, and when the air-conditioning hot water system is in a cooling state Refrigerant heat exchange, fast cooling speed and better cooling effect (refrigerant cooling mode). When the water circulation system is arranged between the compressor 10 and the outdoor heat exchanger 20, the medium water in the water circulation system exchanges heat with the refrigerant in the refrigerant circulation system, and the medium water in the water circulation system when the air conditioning hot water system is in a heating state Is heated so that the user can be provided with hot water. Therefore, the above-mentioned air conditioning and hot water system can not only rapidly cool, but also provide users with hot water during heating, taking into account the cooling effect and comfort in use.

It should be noted that when the refrigerant heat exchanger 30 is disposed between the compressor 10 and the outdoor heat exchanger 20, the refrigerant heat exchanger 30 is located at the end of a refrigerant system such as an indoor wall-hanging machine or a cabinet machine. At this time, in addition to the case where the above-mentioned air-conditioning hot water system is in a cooling state, when the air-conditioning hot water system is in a heating state, the heat exchange through the refrigerant at the end of the wall-mounted machine, cabinet, etc. can also achieve fast heating speed and good heating effect. Effect (refrigerant heating mode).

When the water circulation system is disposed between the compressor 10 and the outdoor heat exchanger 20, the end of the water circulation system can be selected as the end of the water system such as a radiator, a floor heater, a water tank, and a fan coil. When the refrigerant cycle of the air conditioning and hot water system is in a heating state, if the end of the water circulation system is a radiator or floor heating, the medium water in the water circulation system first heats and heats with the refrigerant in the refrigerant circulation system, and then passes into the radiator or floor heating. Therefore, the indoor air is heat-exchanged and heated, and the heating temperature is more than the direct heating of the end of the wall-mounted machine, cabinet, etc. (water heating mode); if the end of the water circulation system is a water tank or radiator, A combination with a water tank. The medium water in the water circulation system first heats and heats with the refrigerant in the refrigerant circulation system, and then flows into the radiator or floor heating to heat the indoor air, and the other part flows into the water tank to provide users with hot water ( Hot water mode). When the refrigerant cycle of the air-conditioning hot water system is in a cooling state, the end of the water circulation system is a fan coil, and the medium water in the water circulation system is first cooled by heat exchange with the refrigerant in the refrigerant cycle system, and then the indoor air is exchanged by the fan coil Cool down (water cooling mode).

It can be known from the foregoing that whether the refrigerant heat exchanger 30 or the water circulation system is connected between the compressor 10 and the outdoor heat exchanger 20, cooling and heating can be achieved. Therefore, when one of the refrigerant heat exchanger 30 and the water circulation system fails to work normally, the other can be switched and used for maintenance, which is more convenient and easy to operate, and the reliability of the air conditioning and hot water system is higher. In addition, the end of the air-conditioning hot water system can be variously selected according to the needs of specific occasions, and the use is more flexible.

As shown in FIGS. 1 and 4, in the air-conditioning hot water system of this embodiment, the water circulation system includes a water heat exchanger 40. The refrigerant heat exchanger 30 and the water heat exchanger 40 are selectively disposed between the compressor 10 and the outdoor heat exchanger 20. When the water circulation system is arranged between the compressor 10 and the outdoor heat exchanger 20, the water heat exchanger 40 is connected between the compressor 10 and the outdoor heat exchanger 20, and the medium water in the water circulation system passes through the water heat exchanger 40 and The refrigerant in the refrigerant circulation system performs heat exchange. The water heat exchanger 40 may be a plate heat exchanger, a sleeve heat exchanger, and the like. The indoor unit of the water circulation system also includes a housing, a pump, a main board, an expansion tank, a filter, and other components. The main board is used for connection with an outdoor unit ( Including outdoor heat exchanger 20) communication.

In addition, the outdoor heat exchanger 20 is a fin heat exchanger, which is located in the outdoor unit. The indoor unit containing the refrigerant heat exchanger 30 may be an indoor wall-mounted unit or a cabinet unit, which includes a housing, a main board, a control panel, and the like. The main board is used to communicate with the outdoor unit (including the outdoor heat exchanger 20). Since the indoor unit and the indoor air directly exchange heat at this time, an indoor circulation fan is generally provided.

As shown in FIGS. 1 and 4, in the air-conditioning hot water system of this embodiment, the air-conditioning hot water system further includes a first commutation device. The refrigerant heat exchanger 30 is connected in parallel with the water circulation system. By switching the first reversing device, the refrigerant heat exchanger 30 or the water circulation system is connected between the compressor 10 and the outdoor heat exchanger 20. In this embodiment, the first reversing device includes a first three-way valve 50 and a second three-way valve 60. The three connection ends of the first three-way valve 50 are respectively connected to the outdoor heat exchanger 20, the water circulation system, and the refrigerant heat exchanger 30. Three connection ends of the second three-way valve 60 are respectively connected to the refrigerant heat exchanger 30, the water circulation system, and the compressor 10. By changing the connection mode of the first three-way valve 50 and the second three-way valve 60, the water heat exchanger 40 of the water circulation system can be cut off, the refrigerant heat exchanger 30 can be connected to the refrigerant circulation system, or the refrigerant heat exchanger 30 can be cut off. The water heat exchanger 40 of the water circulation system is connected to the refrigerant circulation system, and the structure is simple and easy to operate.

As shown in FIGS. 1 and 4, in the air-conditioning hot water system of this embodiment, the air-conditioning hot water system further includes a second commutation device. By switching the second reversing device, the refrigerant circulation system is put into a cooling state or a heating state. In this embodiment, the refrigerant heat exchanger 30 is connected in parallel with the water circulation system. The second reversing device is a four-way valve 70. The four connection ends of the four-way valve 70 are connected to the outlet end of the compressor 10, the outdoor heat exchanger 20, the inlet end of the compressor 10, and the connection nodes of the refrigerant heat exchanger 30 and the water circulation system near the compressor 10, respectively. By operating the four-way valve 70, the inlet end of the compressor 10 can be selectively communicated with the connection node of the outdoor heat exchanger 20 or the refrigerant heat exchanger 30 and the water circulation system near the compressor 10 side. When the inlet end of the compressor 10 is connected to the outdoor heat exchanger 20, the refrigerant circulation system is in a cooling state. When the inlet end of the compressor 10 and the refrigerant heat exchanger 30 are connected to a connection node of the water circulation system near the compressor 10 side The refrigerant circulation system is in a heating state.

It should be noted that, in this embodiment, the distribution of the refrigerant flow rate may be adjusted by the opening degrees of the first three-way valve 50, the second three-way valve 60, and the four-way valve 70. In addition, the specific form of the first reversing device is not limited to the first three-way valve 50 and the second three-way valve 60. In other embodiments not shown in the figure, the first reversing device may be any other device capable of achieving the above. Functional reversing device. For example, the first reversing device may be only a three-way valve. The refrigerant heat exchanger and the water heat exchanger are still connected in parallel, but one side of the refrigerant heat exchanger and the water heat exchanger are directly connected, and the other side is connected to the three The three-way valve can be used to selectively flow the refrigerant into the refrigerant heat exchanger or the water heat exchanger. The second reversing device is not limited to the four-way valve 70. In other embodiments not shown in the figure, the second reversing device may be any other reversing device capable of switching between cooling and heating states.

As shown in FIGS. 1 and 4, in the air-conditioning hot water system of this embodiment, the refrigerant circulation system further includes a gas-liquid separator 80 and a throttling device 90. The gas-liquid separator 80 is disposed at the inlet end of the compressor 10, and is used for gas-liquid separation of the gas-liquid two-phase refrigerant. The gaseous refrigerant generated after the separation enters the compressor 10 for compression. The throttling device 90 is provided on the side of the outdoor heat exchanger 20 remote from the compressor 10, and throttles and reduces the pressure of the refrigerant. In this embodiment, the throttle device 90 is an electronic expansion valve. Of course, the specific form of the throttling device 90 is not limited to this. In other embodiments, the throttling device may also be a capillary tube or the like.

The flow of the refrigerant in the four operating modes (refrigerant cooling, water cooling, refrigerant heating, and water heating / hot water supply) of the air-conditioning hot water system will be described in detail below with reference to FIGS. 1 to 6.

Refrigerant cooling mode:

As shown in FIGS. 1 and 2, the connection end A of the four-way valve 70 communicates with the connection end B, the connection end C communicates with the connection end D, the connection end A of the first three-way valve 50 communicates with the connection end C, and the second The connection end A of the three-way valve 60 is in communication with the connection end C, and the refrigerant heat exchanger 30 is connected to the refrigerant circulation system. The refrigerant passes through the compressor 10, the four-way valve 70 (connecting end A to connecting end B), the outdoor heat exchanger 20, the throttling device 90, the first three-way valve 50 (connecting end A to connecting end C), and the refrigerant exchange Heater 30, second three-way valve 60 (connecting end A to connecting end C), four-way valve 70 (connecting end D to connecting end C), gas-liquid separator 80, and compressor 10.

Water cooling mode:

As shown in FIGS. 1 and 3, the connection end A of the four-way valve 70 is connected to the connection end B, the connection end C is connected to the connection end D, the connection end A of the first three-way valve 50 is connected to the connection end B, and the second The connection end B of the three-way valve 60 is in communication with the connection end C, and the water heat exchanger 40 is connected to the refrigerant circulation system. The refrigerant passes through the compressor 10, four-way valve 70 (connection end A to connection end B), outdoor heat exchanger 20, throttle device 90, first three-way valve 50 (connection end A to connection end B), water exchange Heater 40, second three-way valve 60 (connecting end B to connecting end C), four-way valve 70 (connecting end D to connecting end C), gas-liquid separator 80, and compressor 10.

Refrigerant heating mode:

As shown in FIGS. 4 and 5, the connection end A of the four-way valve 70 is connected to the connection end D, the connection end B is connected to the connection end C, the connection end A of the first three-way valve 50 is connected to the connection end C, and the second The connection end A of the three-way valve 60 is in communication with the connection end C, and the refrigerant heat exchanger 30 is connected to the refrigerant circulation system. The refrigerant passes through the compressor 10, the four-way valve 70 (connecting end A to connecting end D), the second three-way valve 60 (connecting end C to connecting end A), the refrigerant heat exchanger 30, and the first three-way valve 50 ( Connection end C to connection end A), throttle device 90, outdoor heat exchanger 20, four-way valve 70 (connection end B to connection end C), gas-liquid separator 80, and compressor 10.

Water heating / heating mode:

As shown in FIGS. 4 and 6, the connection end A of the four-way valve 70 is connected to the connection end D, the connection end B is connected to the connection end C, the connection end A of the first three-way valve 50 is connected to the connection end B, and the second The connection end A of the three-way valve 60 is in communication with the connection end B, and the water heat exchanger 40 is connected to the refrigerant circulation system. The refrigerant passes through the compressor 10, the four-way valve 70 (connecting end A to connecting end D), the second three-way valve 60 (connecting end C to connecting end B), the water heat exchanger 40, and the first three-way valve 50 ( Connection end B to connection end A), throttle device 90, outdoor heat exchanger 20, four-way valve 70 (connection end B to connection end C), gas-liquid separator 80, and compressor 10.

It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should also be understood that when the terms "including" and / or "including" are used in this specification, they indicate There are features, steps, jobs, devices, components, and / or combinations thereof.

It should be noted that the terms “first” and “second” in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

Of course, the above are the preferred embodiments of the present invention. It should be noted that, for those of ordinary skill in the art, without departing from the basic principles of the present invention, several improvements and retouches can be made, and these improvements and retouches are also considered as the protection scope of the present invention.

Claims

An air-conditioning hot water system includes a refrigerant circulation system. The refrigerant circulation system includes a compressor (10) and an outdoor heat exchanger (20). The refrigerant circulation system includes a refrigerant heat exchanger (30) and a water circulation system. The refrigerant heat exchanger (30) and the water circulation system are selectively disposed between the compressor (10) and the outdoor heat exchanger (20), and when the water circulation system is disposed in the compressor ( 10) between the outdoor heat exchanger (20) and the medium water in the water circulation system and the refrigerant in the refrigerant circulation system perform heat exchange.
The air-conditioning hot water system according to claim 1, wherein the water circulation system comprises a water heat exchanger (40), and when the water circulation system is provided in the compressor (10) and the outdoor heat exchanger (20), the water heat exchanger (40) is connected between the compressor (10) and the outdoor heat exchanger (20), and the medium water in the water circulation system passes through the water The heat exchanger (40) performs heat exchange with the refrigerant in the refrigerant circulation system.
The air-conditioning hot water system according to claim 1, further comprising a first commutation device, the refrigerant heat exchanger (30) is connected in parallel with the water circulation system, and the first commutation device is switched by switching The refrigerant heat exchanger (30) or the water circulation system is connected between the compressor (10) and the outdoor heat exchanger (20).
The air-conditioning hot water system according to claim 3, wherein the first reversing device comprises a first three-way valve (50) and a second three-way valve (60), the first three-way valve ( 50) three connection ends are respectively connected to the outdoor heat exchanger (20), the water circulation system and the refrigerant heat exchanger (30), and the three connection ends of the second three-way valve (60) Connected to the refrigerant heat exchanger (30), the water circulation system, and the compressor (10), respectively.
The air conditioning and hot water system according to claim 1, further comprising a second reversing device, and the refrigerant circulation system is placed in a cooling state or a heating state by switching the second reversing device.
The air conditioning and hot water system according to claim 5, wherein the refrigerant heat exchanger (30) is connected in parallel with the water circulation system, and the second reversing device is a four-way valve (70), and the four The four connection ends of the pass valve (70) are respectively connected to the outlet end of the compressor (10), the outdoor heat exchanger (20), the inlet end of the compressor (10), and the refrigerant heat exchange And a connection node between the compressor (30) and the water circulation system near the compressor (10).
The air-conditioning hot water system according to claim 1, wherein the water circulation system comprises a fan coil, and when the refrigerant circulation system is in a refrigerated state and the water circulation system is provided between the compressor (10) and the When between the outdoor heat exchangers (20), the medium water in the water circulation system first exchanges heat with the refrigerant in the refrigerant circulation system, and then performs heat exchange and cooling on the indoor air through the fan coil.
The air-conditioning hot water system according to claim 1, wherein the water circulation system comprises a radiator or floor heating, and when the refrigerant circulation system is in a heating state and the water circulation system is provided in the compressor (10) Between the outdoor heat exchanger (20) and the medium water in the water circulation system, heat is exchanged with the refrigerant in the refrigerant circulation system to heat the room air, and then at least partially heats the indoor air through the corresponding radiator or floor heating. Heat exchange is performed.
The air-conditioning hot water system according to claim 1 or 8, wherein the water circulation system comprises a water tank, and when the refrigerant circulation system is in a heating state and the water circulation system is provided in the compressor (10) and When the outdoor heat exchanger (20) is in between, the medium water in the water circulation system first exchanges heat with the refrigerant in the refrigerant circulation system, and then flows at least partially into the water tank to provide hot water.
The air-conditioning hot water system according to claim 1, wherein the refrigerant circulation system further comprises a gas-liquid separator (80) and a throttling device (90), and the gas-liquid separator (80) is disposed at the An inlet end of the compressor (10), and the throttling device (90) is disposed on a side of the outdoor heat exchanger (20) remote from the compressor (10).