CN210832605U - Air conditioner - Google Patents

Abstract

The utility model discloses an air conditioner, which comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compression mechanism and an outdoor heat exchanger, and the indoor unit comprises a first indoor heat exchanger, a first throttling regulation device, a second indoor unit and a second indoor throttling device; the air conditioner further includes: the first pipe is connected with the discharge pipe, the outdoor heat exchanger, the first throttling regulation device, the first indoor heat exchanger, the second indoor throttling regulation device, the second indoor heat exchanger and the conduction pipe in sequence; the conduction pipe and the first piping are respectively communicated with two refrigerant passing ports of the second indoor heat exchanger; the constant high-pressure pipe is connected with the discharge pipe and the conduction pipe; the second pipe is connected with the suction pipe and the first connecting point, wherein the first connecting point is the connecting point of the second pipe and the conducting pipe; the first control valve is arranged on the constant high-pressure pipe; the second control valve is provided on the second pipe. The utility model discloses technical scheme is favorable to improving the adaptability of air conditioner.

Description

Air conditioner

Technical Field

The utility model relates to an air conditioner technical field, in particular to air conditioner.

Background

Due to the complexity of weather, the air conditioner needs to have multiple functions at the same time to meet the requirements of people. For example, in order to overcome the weather with very high humidity, it is necessary for an air conditioner to have a dehumidifying function. However, the existing air conditioner with dehumidification function can not control the temperature not to be reduced while dehumidifying, so that the dehumidification process affects the use of users.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an air conditioner aims at making the air conditioner have the dehumidification reheat function, improves the travelling comfort that the user used the air conditioner.

In order to achieve the above object, the present invention provides an air conditioner, comprising an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compression mechanism and an outdoor heat exchanger, and the indoor unit comprises a first indoor heat exchanger, a first throttling regulation device, a second indoor unit and a second indoor throttling device;

the air conditioner further includes: a discharge pipe connected to a discharge side of the compression mechanism, a suction pipe connected to a low-pressure suction side of the compression mechanism, and a first pipe connecting the discharge pipe, the outdoor heat exchanger, the first throttle adjusting device, the first indoor heat exchanger, the second indoor throttle adjusting device, the second indoor heat exchanger, and a conduction pipe in this order; the conduction pipe and the first piping are respectively communicated with two refrigerant passing ports of the second indoor heat exchanger;

the constant high-voltage pipe is connected with the discharge pipe and the conduction pipe;

a second pipe connecting the suction pipe and a first connection point, wherein the first connection point is a connection point of the second pipe and the conduction pipe;

the first control valve is arranged on the constant-pressure pipe;

a second control valve provided in the second pipe.

Optionally, the air conditioner comprises a three-way valve, the three-way valve is arranged at the joint of the constant high-pressure pipe, the first pipe and the second pipe, so that the conduction pipe is communicated with the second pipe and the constant high-pressure pipe respectively, and the on-off of the second pipe and the constant high-pressure pipe can be controlled respectively; the three-way valve replaces the first control valve and the second control.

Optionally, the air conditioner further includes a plurality of indoor units, and first, second, and third connection pipes;

the first connecting pipe and the constant high pressure pipe are connected to the second connecting point, the second connecting pipe and the second tubing are connected to the third connecting point, and the third connecting pipe and the first tubing are connected to the fourth connecting point;

the plurality of indoor units are arranged in parallel on the first connection pipe, the second connection pipe and the third connection pipe.

Optionally, the first control valve is located on the constant high pressure pipe between the first connection point and the second connection point;

the second control valve is located on the second tubing between the first connection point and the third connection point.

Optionally, the air conditioner further includes a water temperature adjusting module, the water temperature adjusting module includes a water temperature adjusting pipeline, the water temperature adjusting pipeline has two refrigerant passing ports, one refrigerant passing port is communicated with the constant high pressure pipe, and the other refrigerant passing port is communicated with a first pipe between the first indoor throttling device and the outdoor heat exchanger.

Optionally, the air conditioner further includes a plurality of indoor units, and first, second, and third connection pipes;

the first connecting pipe and the constant high pressure pipe are connected to the second connecting point, the second connecting pipe and the second tubing are connected to the third connecting point, and the third connecting pipe and the first tubing are connected to the fourth connecting point;

the plurality of indoor units are arranged on the first connecting pipe, the second connecting pipe and the third connecting pipe in parallel;

a third control valve is provided in a second pipe between the third connection point and the suction pipe.

Optionally, the conduit is a part of any one of a constant high pressure pipe, a first pipe and a second pipe.

Optionally, the outdoor unit further comprises switching means switchable between a switching means first switching state and a switching means second switching state,

in the first switching state, the switching device causes the first pipe and the discharge pipe to communicate with each other, and causes the second pipe and the suction pipe to communicate with each other;

in the second switching state, the switching device causes the first pipe to communicate with the suction pipe and causes the second pipe to communicate with the discharge pipe.

Optionally, the air conditioner further comprises an economizer; the economizer is arranged on a first pipe between the outdoor heat exchanger and the first indoor throttling device, and a return pipe of the economizer is communicated with a medium-pressure suction inlet of the compressor.

Optionally, a first refrigerant flow path and a second refrigerant flow path are arranged in the economizer, and two ends of the first refrigerant flow path are respectively communicated with first pipes at two ends of the economizer; one end of the second refrigerant flow path is communicated with the first pipe through a liquid taking pipe, and the other end of the second refrigerant flow path is communicated with a medium-pressure suction inlet of the compressor through a return pipe; and a liquid taking throttle valve is arranged on the liquid taking pipe.

Optionally, the inflow end of the liquid taking pipe is communicated with a first pipe between the economizer and the outdoor side heat exchanger, or,

and the inflow end of the liquid taking pipe is communicated with a first pipe between the economizer and the first indoor throttling device.

Optionally, the return pipe comprises a return pipe body, a first communicating pipe and a second communicating pipe;

one end of the first communicating pipe is communicated with the muffler body, and the other end of the first communicating pipe is communicated with a medium-pressure suction inlet of the compressor; a fourth control valve is arranged on the return pipe body or the first return pipe;

one end of the second communicating pipe is communicated with the muffler body, the other end of the second communicating pipe is communicated with the suction pipe, and a fifth control valve is arranged on the second communicating pipe.

In the technical scheme of the utility model, a first tubing is connected with a discharge pipe, an outdoor heat exchanger, a first throttling regulation device, a first indoor heat exchanger, a second indoor throttling regulation device, a second indoor heat exchanger and a conduction pipe in sequence; connect the discharge pipe and lead through the pipe through the second piping, through permanent high-pressure tube intercommunication discharge pipe and lead through the pipe, and be provided with the break-make of first control valve in order to control permanent high-pressure tube at permanent high-pressure tube, set up the break-make of second control valve in order to control the second piping on the second piping, through opening and closing first control valve and second control valve, the aperture to first throttle adjusting device and second throttle adjusting device is adjusted, make indoor unit can switch between refrigeration mode and dehumidification reheat mode, thereby make the air conditioner have the dehumidification function, in order to respond to high humidity weather, still have the refrigeration function, in order to satisfy user's different demands.

Drawings

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

Fig. 1 is a schematic structural view of an embodiment of an air conditioner of the present invention for heating an outdoor unit;

FIG. 2 is a schematic view showing an internal structure of the economizer of FIG. 1;

fig. 3 is a schematic structural view of an embodiment of the air conditioner of the present invention in an outdoor unit for refrigeration;

fig. 4 is a schematic structural diagram of another embodiment of the air conditioner of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Outdoor unit	110	Compressor with a compressor housing having a plurality of compressor blades
111	Discharge pipe	120	Gas-liquid separator
				131	Switching device	133	Fourth control valve
134	One-way valve	140	First piping
				141	Outdoor side heat exchanger	142	Outdoor side throttling regulating device
143	Economizer	144	Liquid-taking throttle valve
				145	Liquid taking tube	146	Return pipe
147	Second communicating pipe	148	First communicating pipe
				149	Fifth control valve	150	Second piping
160	Constant high-pressure pipe	152	Third connecting point
				153	Third control valve	151	Second control valve
200	Indoor unit	220	Second indoor heat exchanger
				210	First indoor heat exchanger	230	First throttle adjusting device
240	Second throttle adjusting device	250	First connecting pipe
				260	Second connecting pipe	270	Third connecting pipe
271	Fourth connecting point	211	First connecting point
				162	Second connecting point	P	Exhaust port
M	Medium pressure air suction inlet	S	Low-pressure air suction port
				113	Low-pressure suction pipe	180	Conduction pipe
143a	First refrigerant flow path	143b	Second refrigerant flow path
				500	Water temperature adjusting module	161	First control valve

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Hereinafter, a specific piping structure of the air conditioner will be mainly described.

Referring to fig. 1 to 4, first, the entire piping structure and component arrangement of the air conditioner will be described; in the embodiment of the present invention, the air conditioner includes an outdoor unit 100 and an indoor unit 200, the outdoor unit 100 includes a compressor 110 and an outdoor heat exchanger, the indoor unit 200 includes a first indoor heat exchanger 210, a first throttling adjustment device 230, a second indoor unit 200 and a second indoor throttling device;

the air conditioner further includes: a discharge pipe 111 connected to a discharge side of the compressor 110, a suction pipe connected to a low pressure suction side of the compressor 110, and a first pipe 140 connecting the discharge pipe 111, the outdoor heat exchanger, the first throttle control device 230, the first indoor heat exchanger 210, the second indoor throttle device, and the second indoor heat exchanger 220 in this order, and a communication pipe 180; the conduction pipe 180 and the first pipe 140 are respectively communicated with two refrigerant passing ports of the second indoor heat exchanger 220;

a constant high pressure pipe 160, the constant high pressure pipe 160 connecting the discharge pipe 111 and the conduction pipe 180;

a second pipe 150, wherein the second pipe 150 connects the suction pipe and the first connection point 211, and the first connection point 211 is a connection point between the second pipe 150 and the conducting pipe 180;

a first control valve 161, the first control valve 161 being provided on the constant-pressure pipe 160;

and a second control valve 151, wherein the second control valve 151 is provided in the second pipe 150.

Specifically, in the present embodiment, the first control valve 161 and the second control valve 151 may be solenoid valves for controlling the on/off of the constant high-pressure pipe 160 and the second pipe 150. The first throttle adjusting device 230 and the second throttle adjusting device 240 may be electronic throttle valves, such as electronic expansion valves. It should be noted that the form of the conducting pipe 180 may be many, and specifically, the conducting pipe 180 is a part of any one of the constant high pressure pipe 160, the first pipe 140 and the second pipe 150. That is, the conducting pipe 180 may be provided independently, or may be an extension of the first pipe 140, an extension of the second pipe 150, or an extension of the constant-pressure pipe 160.

On the basis of the above-mentioned pipeline, when there is only one indoor unit 200, the air-conditioning indoor unit 200 can realize any one of dehumidification reheating and cooling by controlling the opening and closing of the first control valve 161 and the second control valve 151; when the switching device is installed such that the discharge pipe 111 communicates with the second pipe 150 and the suction pipe communicates with the first pipe 140, it is possible to achieve either heating or temperature-raising dehumidification.

When the number of the indoor units 200 is plural and there is an indoor heat exchanger of the indoor unit 200 that needs to perform cooling (which needs to comply with energy conservation), the above-described piping structure can also perform heating and temperature-rise dehumidification (without providing a switching device). That is, when the number of the indoor units 200 is plural, different indoor units 200 may implement various modes of cooling, heating, dehumidification and reheating, and temperature rise and dehumidification as needed.

The following is a detailed description of various modes:

a refrigeration mode:

the high-temperature and high-pressure refrigerant is discharged from the discharge pipe, sequentially passes through the first pipe 140, the outdoor heat exchanger 141, and the economizer 143, and sequentially passes through the first throttle controller 230, the first indoor heat exchanger 210, the second indoor throttle controller, the second indoor heat exchanger 220, and the conduction pipe 180. The first indoor heat exchanger 210 and the second indoor heat exchanger 220 are simultaneously cooled by adjusting the opening degrees of the first throttling device 230 and the second throttling device 240. The refrigerant flows into the second pipe 150 through the conducting pipe 180, sequentially passes through the second control valve 151 and the suction pipe, and then returns to the compressor 110. In this process, the first control valve 161 is closed or opened, and the second control valve 151 is opened, taking the closing as an example.

Dehumidification reheating mode:

the high-temperature and high-pressure refrigerant is discharged from the discharge pipe, sequentially passes through the first pipe 140, the outdoor heat exchanger 141, and the economizer 143, and sequentially passes through the first throttle controller 230, the first indoor heat exchanger 210, the second indoor throttle controller, the second indoor heat exchanger 220, and the conduction pipe 180. Through the opening adjustment of the first throttle adjusting device 230 and the second throttle adjusting device 240, the first indoor heat exchanger 210 heats, and the second indoor heat exchanger 220 cools, so that the air is firstly cooled and dehumidified by the second indoor heat exchanger 220, and then is heated and returned to the temperature by the first indoor heat exchanger 210. The refrigerant flows into the second pipe 150 through the conducting pipe 180, sequentially passes through the second control valve 151 and the suction pipe, and then returns to the compressor 110. In this process, the first control valve 161 is closed or opened, and the second control valve 151 is opened.

Of course, in some embodiments, in order to improve the heat exchange efficiency between the indoor heat exchanger and the indoor air, the indoor unit 200 further includes a heat circulating device for sending the heat or the cold of the indoor unit 200 into the room; wherein, the heat cycle device may be a wind wheel in some embodiments, and the wind wheel rotates to deliver the air after exchanging heat with the primary heat exchanger and the second indoor heat exchanger 220 to the indoor. Of course, in other embodiments, the heat circulation device may also be a water circulation device, and the first indoor heat exchanger 210 and the second indoor heat exchanger 220 send heat or cold into the room through the circulating water flowing in the water circulation device.

In this embodiment, the first pipe 140 is connected to the discharge pipe 111, the outdoor heat exchanger, the first throttle control device 230, the first indoor heat exchanger 210, the second indoor throttle control device, the second indoor heat exchanger 220, and the conduction pipe 180 in this order; the discharge pipe 111 and the conduction pipe 180 are connected through the second piping 150, the discharge pipe 111 and the conduction pipe 180 are communicated through the constant high pressure pipe 160, the first control valve 161 is arranged on the constant high pressure pipe 160 to control the on-off of the constant high pressure pipe 160, the second control valve 151 is arranged on the second piping 150 to control the on-off of the second piping 150, the opening degree of the first throttling regulation device 230 and the second throttling regulation device 240 is regulated by opening and closing the first control valve 161 and the second control valve 151, so that the indoor unit 200 can be switched between a refrigeration mode and a dehumidification and reheating mode, and the air conditioner has a dehumidification function to cope with high humidity weather and a refrigeration function to meet different requirements of users.

It should be noted that, in some embodiments, the first control valve 161 and the second control valve 151 in the above embodiments may be replaced by three-way valves in order to simplify the piping structure. The air conditioner includes a three-way valve provided at a junction of the constant high pressure pipe 160, the first piping 140, and the second piping 150 so that the conduction pipe 180 communicates the second piping 150 and the constant high pressure pipe 160, respectively, and can control on/off of the second piping 150 and the constant high pressure pipe 160, respectively; the three-way valve replaces the first control valve 161 and the second control.

Specifically, the conduction pipe 180, the second pipe 150, and the constant high pressure pipe 160 are connected to the first connection point 211. In this case, a three-way valve may be provided at the first connection point 211 instead of two-way valves. The three-way valve realizes that the conduction pipe 180 is respectively communicated with the second piping 150 and the constant high pressure pipe 160, and can respectively control the connection and disconnection between the conduction pipe 180 and the constant high pressure pipe 160 and the connection and disconnection between the conduction pipe 180 and the second piping 150.

In some embodiments, in order to enable the indoor unit 200 to realize more operation modes, the outdoor unit 100 further comprises a switching device 131, the switching device 131 can be switched between a first switching state and a second switching state,

in the first switching state, the switching device 131 communicates the first pipe 140 with the discharge pipe 111, and the second pipe 150 communicates with the suction pipe; in the second switching state, the switching device 131 causes the first pipe 140 to communicate with the suction pipe, and the second pipe 150 to communicate with the discharge pipe 111. Wherein, the switching device 131 may be a four-way valve.

Switching device 131 is provided between discharge pipe 111, suction pipe, first pipe 140, and second pipe 150, and allows discharge pipe 111 to communicate with first pipe 140 or second pipe 150, and allows suction pipe to communicate with second pipe 150 or first pipe 140. In the first switching state, the operation modes that can be realized by the indoor unit 200 have been described in the above embodiments, and are not described herein again, and the following description mainly refers to the second switching state.

Heating mode:

the high-temperature and high-pressure refrigerant is discharged from the discharge pipe, sequentially passes through the second pipe 150, the second control valve 151, and the conduction pipe 180, sequentially passes through the second indoor heat exchanger 220, the second indoor throttling device, the first indoor heat exchanger 210, the first throttling adjustment device 230, and the outdoor heat exchanger, and then returns to the compressor 110 through the return pipe 146. By adjusting the opening degrees of the first throttling device 230 and the second throttling device 240, the first indoor heat exchanger 210 and the second indoor heat exchanger 220 simultaneously heat and the outdoor heat exchanger cools. At this time, the second control valve 151 is opened.

Or, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe, sequentially passes through the constant high-pressure pipe 160, the first control valve 161 and the conducting pipe 180, sequentially passes through the second indoor heat exchanger 220, the second indoor throttling device, the first indoor heat exchanger 210, the first throttling regulation device 230 and the outdoor heat exchanger, and then returns to the compressor 110 through the return pipe 146. By adjusting the opening degrees of the first throttling device 230 and the second throttling device 240, the first indoor heat exchanger 210 and the second indoor heat exchanger 220 simultaneously heat and the outdoor heat exchanger cools. At this time, the first control valve 161 is opened.

Of course, in some embodiments, the upper two flow paths may exist simultaneously, and depending on the control of the first and second control valves 161 and 151, the upper two flow paths operate simultaneously when the first and second control valves 161 and 151 are simultaneously opened.

A heating and dehumidifying mode:

the high-temperature and high-pressure refrigerant is discharged from the discharge pipe, sequentially passes through the second pipe 150, the second control valve 151, and the conduction pipe 180, sequentially passes through the second indoor heat exchanger 220, the second indoor throttling device, the first indoor heat exchanger 210, the first throttling adjustment device 230, and the outdoor heat exchanger, and then returns to the compressor 110 through the return pipe 146. By adjusting the opening degrees of the first throttling device 230 and the second throttling device 240, the first indoor heat exchanger 210 cools, the second indoor heat exchanger 220 heats, and the outdoor heat exchanger cools. At this time, the second control valve 151 is opened.

Or, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe, sequentially passes through the constant high-pressure pipe 160, the first control valve 161 and the conducting pipe 180, sequentially passes through the second indoor heat exchanger 220, the second indoor throttling device, the first indoor heat exchanger 210, the first throttling regulation device 230 and the outdoor heat exchanger, and then returns to the compressor 110 through the return pipe 146. By adjusting the opening degrees of the first throttling device 230 and the second throttling device 240, the first indoor heat exchanger 210 cools, the second indoor heat exchanger 220 heats, and the outdoor heat exchanger cools. At this time, the first control valve 161 is opened.

Of course, in some embodiments, the upper two flow paths may exist simultaneously, and depending on the control of the first and second control valves 161 and 151, the upper two flow paths operate simultaneously when the first and second control valves 161 and 151 are simultaneously opened.

In some embodiments, in order to better adjust the supercooling degree of the outdoor heat exchanger, the air conditioner further includes an outdoor side throttling adjustment device 142, and the outdoor side throttling adjustment device 142 is located on the first pipe 140 between the economizer 143 and the outdoor side heat exchanger 141. In embodiments without the economizer 143, the outdoor side throttling device 142 is located on the first piping 140 between the outdoor heat exchanger and the first indoor throttling device. The outdoor side throttle adjusting means 142 comprises an outdoor throttle valve.

In some embodiments, in order to reduce the pressure loss of the refrigerant in the first pipe 140, the air conditioner further includes a first check valve 134, and the first check valve 134 is connected in parallel to the outdoor throttling adjustment device 142. The conducting direction of the first check valve 134 can be set according to different working condition requirements, and the first check valve can be set to be in one-way conduction from the outdoor heat exchanger to the first indoor throttling device, or can be set to be in one-way conduction from the first indoor throttling device to the outdoor heat exchanger, for example. When throttling is not necessary, the valve is opened as much as possible by the check valve 134, and when throttling is necessary, the outdoor throttle control device 142 is opened. The outdoor side throttle adjusting means 142 may be an electromagnetic throttle valve. In some embodiments, when the outdoor-side throttling adjustment device 142 is a large-diameter throttle valve, the first check valve 134 may not be provided; when the outdoor side throttling regulation device 142 is a small-diameter throttling valve, the first check valve 134 is arranged as much as possible to relieve the pressure in the throttling device, so that the throttling device is protected.

In some embodiments, the air conditioner further includes a plurality of indoor units 200, and the heat exchanger types included in the respective indoor units 200 may be different, such as an indoor unit with a constant temperature dehumidification function (having both the first indoor heat exchanger 210 and the second indoor heat exchanger 220), an ordinary cooling/heating indoor unit (having only one heat exchanger and a corresponding throttling device), and an indoor unit with a switching device capable of freely switching a cooling or heating state, which may be one or more, so that the air conditioner may simultaneously perform hybrid operations of dehumidification, reheating, cooling, heating, dehumidification, etc.

Specifically, the air conditioner further includes a plurality of indoor units 200, and first, second, and third connection pipes 250, 260, and 270; the first connection pipe 250 and the constant high pressure pipe 160 are connected to the second connection point 162, the second connection pipe 260 and the second piping 150 are connected to the third connection point 152, and the third connection pipe 270 and the first piping 140 are connected to the fourth connection point 271; the plurality of indoor units 200 are disposed in parallel on the first connection pipe 250, the second connection pipe 260, and the third connection pipe 270 or disposed in parallel on the second connection pipe 260 and the third connection pipe 270.

The first connection pipe 250 branches off from the second connection point 162 of the first pipe 140, the second connection pipe 260 branches off from the second pipe 150, the second connection point 162 is located in the constant-pressure pipe 160 between the first control valve 161 and the discharge pipe 111, the third connection point 152 is located in the second pipe 150 between the second control valve 151 and the suction pipe, and the fourth connection point 271 is located in the first pipe 140 where the first throttling device 230 and the outdoor throttling device are directly connected. Correspondingly, the first control valve 161 is located on the constant high pressure pipe 160 between the first connection point 211 and the second connection point 162; the second control valve 151 is located in the second pipe 150 between the first connection point 211 and the third connection point 152.

Thus, the plurality of indoor units 200 are simultaneously connected to the refrigerant circulation system, and when different indoor units 200 require different modes, the refrigerant can selectively flow from one indoor unit 200 to another indoor unit 200, for example, two indoor units 200 are taken as a simple example. When the switching device 131 is in the first switching state, that is, when the discharge pipe 111 communicates with the first pipe 140 and the suction pipe communicates with the second pipe 150, one indoor unit 200 needs to be heated and the other indoor unit 200 needs to be cooled. At this time, the high-temperature and high-pressure refrigerant flows out of the discharge pipe 111, passes through the constant high-pressure pipe 160 and the first control valve 161, and enters the first indoor heat exchanger 210 and the second indoor heat exchanger 220 to perform heating. The refrigerant flows out of the second indoor heat exchanger 220, enters the first connection pipe 250, flows into the cooling indoor unit 200 through the first connection pipe 250, and sequentially passes through the first indoor heat exchanger 210 and the second indoor heat exchanger 220 of the cooling indoor unit 200 to be cooled. The first control valve 161 of the heating indoor unit 200 is opened and the second control valve 151 is closed.

The first control valve 161 of the cooling indoor unit 200 is closed, the second control valve 151 is opened, and the refrigerant of high temperature and high pressure passes through the discharge pipe 111, enters the outdoor heat exchanger through the first pipe 140 to be heated, passes through the first indoor heat exchanger 210 and the second indoor heat exchanger 220 of the cooling indoor unit 200 in sequence to be cooled, passes through the conduction pipe 180, the second pipe 150 and the suction pipe in sequence, and flows back to the compressor 110, thereby realizing a large circulation of the refrigerant.

In general, the high-temperature and high-pressure refrigerant discharged from the discharge pipe 111 flows through two paths, one path is first introduced into the heating indoor unit 200 to heat, then introduced into the cooling indoor unit 200 to cool, and then returned to the compressor 110 through the second pipe 150 and the suction pipe; the other is to release heat through the outdoor heat exchanger, enter the indoor unit 200 for cooling, and return the heat to the compressor 110 through the second pipe 150 and the suction pipe. When the air conditioner is provided with a plurality of indoor units 200, the trend of the refrigerant is more flexible, so that different requirements of people are met, and the adaptability and the energy efficiency of the air conditioner are greatly improved.

In some embodiments, the air conditioner can also be used for adjusting the water temperature, and the water after heat exchange can be used as domestic water and can also be used as floor heating water. The air conditioner further comprises a water temperature adjusting module 500, wherein the water temperature adjusting module 500 comprises a water temperature adjusting pipeline, the water temperature adjusting pipeline is provided with two refrigerant passing ports, one refrigerant passing port is communicated with the constant high-pressure pipe 160, and the other refrigerant passing port is communicated with the first distribution pipe 140 between the first indoor throttling device and the outdoor heat exchanger. The refrigerant enters the water temperature adjusting pipe through the constant high pressure pipe 160, enters the first pipe 140, passes through the outdoor heat exchanger and the suction pipe, and then returns to the compressor 110.

The air conditioner is also used for supplying water for floor heating or preparing domestic water for people.

When the air conditioner further comprises a floor heating module, the air conditioner further comprises a heat exchange water tank and a floor heating water flow pipe communicated with the heat exchange water tank; a floor heating heat exchanger is arranged in the heat exchange water tank, a refrigerant inlet of the floor heating heat exchanger is communicated with a constant high pressure pipe 160, a refrigerant outlet of the floor heating heat exchanger is communicated with a first pipe 140, and a third control valve 153 is arranged on a second pipe 150.

Specifically, in this embodiment, ground heating water pipe can bury underground in the middle of ground or the wall, ground heating water pipe and heat exchange water tank intercommunication, and water among the heat exchange water tank can be at ground heating water pipe mesocycle for the temperature in the ground heating water pipe is equivalent with the temperature in the heat exchange water tank. When a high-temperature and high-pressure refrigerant passes through the floor heating heat exchanger, the floor heating heat exchanger exchanges heat with water in a heat exchange water tank to heat cold water in the water tank; when low-temperature coolant passes through, the ground heating heat exchanger exchanges heat with water in the heat exchange water tank to cool the water in the heat exchange water tank. When the floor heating heat exchanger works, the third control valve 153 can be selectively closed (closed when the floor heating is required to be efficiently heated), at the moment, accumulation of refrigerants in the indoor heat exchanger is reduced, and the outdoor unit 100 mainly serves the floor heating heat exchanger so as to improve the heat exchange efficiency of the floor heating heat exchanger.

In some further embodiments, the air conditioner further includes a water treatment device including a water heat exchanger for heating or cooling water in a water container and the water container, and the water heat exchanger is connected to the first connection pipe 250 and the third connection pipe 270 in parallel with the indoor unit 200. The water heat exchanger heats or refrigerates water in the water container, of course, the water containers can be multiple, and the water heat exchangers can also be multiple and arranged in parallel, so that one water container can contain hot water, and the other water container can contain cold water, and the cold water and the hot water can be supplied simultaneously. When hot water is required to be produced, high-temperature refrigerants pass through the water heat exchanger, so that heat energy is transferred to water in the container; when the refrigeration water is needed, the low-temperature refrigerant passes through the water heat exchanger, so that the cold energy is transferred to the water in the container.

In some embodiments, to improve the ability of the air conditioner to heat at low temperatures, the air conditioner further comprises an economizer 143; the economizer 143 is provided in the first pipe 140 between the outdoor heat exchanger and the first throttling regulation, and a return pipe 146 of the economizer 143 communicates with the medium-pressure suction port of the compressor 110. The return pipe 146 may have various forms, and the return pipe 146 may include only the body of the return pipe 146, or may include the body of the return pipe 146 and a first communication pipe 148, one end of the first communication pipe 148 is communicated with the body of the return pipe 146, and the other end is communicated with the medium-pressure suction port of the compressor 110.

A fourth control valve 133 is provided in the return line 146 or in a first communication line 148 between the return line 146 and the medium pressure suction port of the compressor 110. The compressor 110 in this case is a vapor injection enthalpy compressor 110, and has a low pressure suction port and an intermediate pressure suction port.

The economizer 143 has a throttling function, a first refrigerant flow path 143a and a second refrigerant flow path 143b are arranged in the economizer 143, and two ends of the first refrigerant flow path 143a are respectively communicated with the first piping 140 at two ends of the economizer 143; one end of the second refrigerant passage 143b is connected to the first pipe 140 via a liquid taking pipe 145, and the other end is connected to a medium-pressure suction port of the compressor 110 via a return pipe 146; a liquid extraction throttle 144 is provided in the liquid extraction pipe 145. One end of the first refrigerant fluid communicates with a refrigerant inlet of the economizer 143, and the other end communicates with a refrigerant outlet of the economizer 143. The liquid extraction pipe 145 has one end communicating with the first pipe 140 and the other end communicating with the second refrigerant passage 143b, and the return pipe 146 has one end communicating with the medium-pressure suction port of the compressor 110 and the other end communicating with the second refrigerant passage 143 b.

As described above, referring to the refrigerant flow path in the heating mode, the high-temperature and high-pressure refrigerant flows out of the discharge pipe 111 of the compressor 110, passes through the constant high-pressure pipe 160 or the second pipe 150, enters the conduction pipe 180, passes through the second indoor heat exchanger 220 and the first indoor heat exchanger in sequence to perform heating, and flows back to the low-pressure suction port of the compressor 110 along the first pipe 140 after passing through the economizer 143, the outdoor throttle adjusting device 142, the outdoor heat exchanger, and the suction pipe.

The liquid refrigerant enters the economizer 143 and is divided into two parts: the first part directly enters an outdoor heat exchanger for evaporation and heat absorption after being throttled and reduced in pressure by an outdoor throttling adjusting device 142 (an electronic expansion valve), the second part enters an economizer 143 for heat absorption and evaporation after being throttled and reduced in pressure by a liquid taking throttle valve 144 (the electronic expansion valve), the evaporated medium-pressure saturated steam enters a medium-pressure air suction port of the compressor 110 through a return pipe 146, a fourth control valve 133 and a communicating pipe and is mixed with a refrigerant of a low-pressure air suction port of the compressor 110 for compression, the problems of small refrigerant flow, low return air pressure, high compression ratio and the like in a low-temperature environment are solved, and the low-temperature heat production capacity and the reliability of the system are improved. Through the utility model discloses a technique, when outdoor ambient temperature is low temperature, through the system design of air injection enthalpy-increasing compressor 110 and economic ware 143, increases the refrigerant air suction volume under the compressor 110 low temperature environment, and then improves the low temperature heating volume, reduces the compression ratio under the low temperature environment simultaneously, can improve the reliability of system.

In order to improve the liquid extraction effect, the inflow end of the liquid extraction pipe 145 is communicated with the first pipe 140 between the economizer 143 and the outdoor heat exchanger, and in other embodiments, the inflow end of the liquid extraction pipe 145 can also be communicated with the first pipe 140 between the economizer 143 and the first intersection. That is, the refrigerant flows in from the refrigerant outflow end of the economizer 143, which is advantageous for improving the reliability of liquid extraction.

In other embodiments, in order to avoid the unpleasant noise generated when the refrigerant in the vapor-liquid two-phase state passes through the indoor throttling device, the air conditioner further includes a gas-liquid separator 120 and an economizer 143, wherein the gas-liquid separator 120 is disposed on the low-pressure suction pipe 113; the economizer 143 is provided in the first pipe 140 between the outdoor heat exchanger and the first indoor throttle device, and a return pipe 146 of the economizer 143 communicates with the gas-liquid separator 120. The return pipe 146 may have various forms, and the return pipe 146 may include only the body of the return pipe 146, or may include the body of the return pipe 146 and a second connection pipe 147, where one end of the second connection pipe 147 is connected to the body of the return pipe 146, and the other end is connected to the gas-liquid separator 120.

For convenience of control, in some examples, the return pipe 146 is communicated with the gas-liquid separator 120 through the low pressure suction pipe 113, and the fifth control valve 149 is disposed on the return pipe 146 or a second communication pipe between the return pipe 146 and the low pressure suction pipe 113.

The utility model discloses an adopt the system design who takes economic ware 143 on the basis of three-pipe system dehumidification reheating scheme, take liquid choke valve 144 (electronic expansion valve) of getting in the economic ware 143 system design return circuit through the control, further reduce the refrigerant condensation temperature of outdoor heat exchanger export, improve the super-cooled rate, make the refrigerant complete condensation be liquid, liquid refrigerant gets into indoor heat exchanger heat absorption evaporation after indoor electronic expansion valve throttle step-down, when the refrigerant through indoor throttling arrangement was full liquid, can solve the refrigerant abnormal sound that the gas-liquid double-phase attitude produced.

After the discharge of the compressor 110 is switched by the switching device 131, the high-pressure and high-temperature gaseous refrigerant enters the outdoor heat exchanger for condensation and heat exchange, and the gas-liquid two-phase medium-temperature and high-pressure refrigerant coming out of the outdoor heat exchanger enters the economizer 143 and then is divided into two parts: the first part is throttled and depressurized by the liquid taking throttle valve 144, then enters the economizer 143 through the liquid taking pipe 145 to absorb heat and evaporate, the evaporated gaseous refrigerant passes through the return pipe 146, the fifth control valve 149 (solenoid valve) and the communicating pipe enter the gas-liquid separator 120, then is mixed with the gaseous refrigerant subjected to heat absorption and evaporation by the indoor heat exchanger, and then enters the air suction port of the compressor 110, the second part is further condensed and heat exchanged from the economizer 143, the gas-liquid two-phase refrigerant is changed into a pure liquid refrigerant, and the pure liquid refrigerant flows indoors, throttled and depressurized by the dehumidification throttle valve and the reheating throttle valve and then enters the first indoor heat exchanger 210 and the second indoor heat exchanger 220 to absorb heat and evaporate. The refrigerant entering the first throttling regulation device 230 and the second throttling regulation device 240 (electronic expansion valve) changes from a gas-liquid two-phase state to a pure liquid state, so that the problem of refrigerant noise generated when the gas-liquid two-phase refrigerant passes through the throttling device is solved.

In this embodiment, through the technical scheme of the utility model, can further reduce the refrigerant condensation temperature of outdoor heat exchanger export, improve the supercooling degree, make the refrigerant be liquid from the complete condensation of gas-liquid two-phase state, liquid refrigerant gets into indoor heat exchanger endothermic evaporation after indoor electronic expansion valve (first throttle adjusting device 230 and second throttle adjusting device 240) throttle step-down, when the refrigerant through indoor throttling arrangement (first throttle adjusting device 230 and second throttle adjusting device 240) is full liquid, can solve the produced refrigerant abnormal sound problem of gas-liquid two-phase state refrigerant through throttling arrangement, improve user's satisfaction

It should be noted that in some embodiments, the return pipe 146 is connected to the intermediate-pressure suction port of the compressor 110 and the gas-liquid separator 120 through different connection pipes, and in this case, the fourth control valve 133 (close to the compressor 110) and the fifth control valve 149 (close to the gas-liquid separator 120) are respectively disposed on the two connection pipes (the first connection pipe 148 and the second connection pipe 147). The return line 146 in this case includes the body of the return line 146 and two communication pipes. In the heating mode, the fifth control valve 149 is closed, and the fourth control valve 133 is opened, so that the refrigerant flows into the compressor 110, thereby improving the heating capacity; and in the cooling mode or the constant-temperature dehumidification mode, the fourth control valve is closed, and the fifth control valve is opened to eliminate abnormal sound. Of course, in some embodiments, the fifth control valve 149 may be closed and the fourth control valve opened as required by particular operating conditions. The arrangement is such that the air conditioner can adjust the fourth control valve 133 and the fifth control valve according to specific conditions, thereby improving the heating capacity of the air conditioner in the heating mode and reducing noise in the cooling and constant temperature dehumidification modes.

Regarding the specific connection between the compressor 110 and the economizer 143, the compressor 110 is an enhanced vapor injection compressor 110, and the compressor 110 has a conventional high pressure discharge port P, a low pressure suction port S, and a medium pressure suction port M (i.e., a vapor injection port) through which medium pressure refrigerant vapor enters the compressor 110 to increase the effective flow rate of the refrigerant.

The port a of the economizer 143 is connected to one end of the outdoor heat exchanger, the port b of the economizer 143 is connected to the fourth connection point 271 or the first throttling regulation device 230, the port c of the economizer 143 is connected to the liquid taking pipe 145, the port d of the economizer 143 is connected to the return pipe 146, the liquid taking throttle valve 144 is connected in series to the liquid taking pipe 145, the fourth control valve is connected in series to the connection pipe, the fifth control valve is connected in series to another connection pipe, one end of the connection pipe is connected to the medium pressure suction port M of the compressor 110, and the other connection pipe is connected to the inlet end of the gas-liquid separator 120.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims (12)

1. An air conditioner is characterized by comprising an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compression mechanism and an outdoor heat exchanger, and the indoor unit comprises a first indoor heat exchanger, a first throttling regulation device, a second indoor heat exchanger and a second indoor throttling device;

the air conditioner further includes: a discharge pipe connected to a discharge side of the compression mechanism, a suction pipe connected to a low-pressure suction side of the compression mechanism, and a first pipe connecting the discharge pipe, the outdoor heat exchanger, the first throttle adjusting device, the first indoor heat exchanger, the second indoor throttle adjusting device, the second indoor heat exchanger, and a conduction pipe in this order; the conduction pipe and the first piping are respectively communicated with two refrigerant passing ports of the second indoor heat exchanger;

the constant high-voltage pipe is connected with the discharge pipe and the conduction pipe;

a second pipe connecting the suction pipe and a first connection point, wherein the first connection point is a connection point of the second pipe and the conduction pipe;

the first control valve is arranged on the constant-pressure pipe;

a second control valve provided in the second pipe.

2. The air conditioner according to claim 1, wherein the air conditioner comprises a three-way valve provided at a junction of the constant high pressure pipe, the first pipe and the second pipe so that the conduction pipe communicates with the second pipe and the constant high pressure pipe, respectively, and the make-and-break of the second pipe and the constant high pressure pipe can be controlled, respectively; the three-way valve replaces the first control valve and the second control.

3. The air conditioner of claim 1, further comprising a plurality of indoor units, and a first connection pipe, a second connection pipe, and a third connection pipe;

the first connecting pipe and the constant high pressure pipe are connected to the second connecting point, the second connecting pipe and the second tubing are connected to the third connecting point, and the third connecting pipe and the first tubing are connected to the fourth connecting point;

the plurality of indoor units are arranged on the first connecting pipe, the second connecting pipe and the third connecting pipe in parallel;

alternatively, a plurality of indoor units are disposed in parallel on the second connection pipe and the third connection pipe.

4. The air conditioner according to claim 3, wherein the first control valve is located on a constant high pressure pipe between the first connection point and the second connection point;

the second control valve is located on the second tubing between the first connection point and the third connection point.

5. The air conditioner as claimed in claim 1, further comprising a water temperature adjusting module including a water temperature adjusting pipe having two refrigerant passing ports, one of the refrigerant passing ports communicating with the constant high pressure pipe and the other of the refrigerant passing ports communicating with a first pipe between the first indoor throttling means and the outdoor heat exchanger.

6. The air conditioner of claim 5, further comprising a plurality of indoor units, and a first connection pipe, a second connection pipe, and a third connection pipe;

the first connecting pipe and the constant high pressure pipe are connected to the second connecting point, the second connecting pipe and the second tubing are connected to the third connecting point, and the third connecting pipe and the first tubing are connected to the fourth connecting point;

the plurality of indoor units are arranged on the first connecting pipe, the second connecting pipe and the third connecting pipe in parallel;

a third control valve is provided in a second pipe between the third connection point and the suction pipe.

7. The air conditioner according to any one of claims 1 to 6, wherein the conduction pipe is a part of any one of a constant high pressure pipe, a first pipe and a second pipe.

8. The air conditioner according to any one of claims 1 to 6, wherein said outdoor unit further comprises switching means capable of switching between a first switching state and a second switching state,

in the first switching state, the switching device causes the first pipe and the discharge pipe to communicate with each other, and causes the second pipe and the suction pipe to communicate with each other;

in the second switching state, the switching device causes the first pipe to communicate with the suction pipe and causes the second pipe to communicate with the discharge pipe.

9. The air conditioner of claim 1, further comprising an economizer; the economizer is arranged on a first pipe between the outdoor heat exchanger and the first indoor throttling device, and a return pipe of the economizer is communicated with a medium-pressure suction inlet of the compressor.

10. The air conditioner as claimed in claim 9, wherein a first refrigerant flow path and a second refrigerant flow path are provided in the economizer, and both ends of the first refrigerant flow path are respectively communicated with first pipes at both ends of the economizer; one end of the second refrigerant flow path is communicated with the first pipe through a liquid taking pipe, and the other end of the second refrigerant flow path is communicated with a medium-pressure suction inlet of the compressor through a return pipe; and a liquid taking throttle valve is arranged on the liquid taking pipe.

11. The air conditioner according to claim 10, wherein the inflow end of the liquid take-out pipe communicates with a first pipe between the economizer and the outdoor side heat exchanger, or,

and the inflow end of the liquid taking pipe is communicated with a first pipe between the economizer and the first indoor throttling device.

12. The air conditioner as claimed in claim 10, wherein the return pipe includes a return pipe body, a first communicating pipe and a second communicating pipe;

one end of the first communicating pipe is communicated with the muffler body, and the other end of the first communicating pipe is communicated with a medium-pressure suction inlet of the compressor; a fourth control valve is arranged on the return pipe body or the first communication pipe;

one end of the second communicating pipe is communicated with the muffler body, the other end of the second communicating pipe is communicated with the suction pipe, and a fifth control valve is arranged on the second communicating pipe.

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