CN212538020U - Air conditioning system with cold and hot modes running simultaneously - Google Patents

Abstract

The utility model provides an air conditioning system of cold and hot mode simultaneous operation, including off-premises station and two at least indoor sets, the off-premises station includes compressor, outdoor heat exchanger and a plurality of parallelly connected cross valves that set up, wherein, outdoor heat exchanger includes many refrigerant flow paths, every the indoor set all corresponds intercommunication one cross valve and one the refrigerant flow path, the compressor the cross valve the indoor set with outdoor heat exchanger forms refrigerant circulation circuit, and is through a plurality of the cross valve is controlled a plurality ofly respectively refrigerant flow direction in the refrigerant circulation circuit realizes a plurality ofly the different operating modes of indoor set. The utility model discloses a refrigerant flow direction in a plurality of refrigerant circulation circuit that a plurality of cross valves controlled the formation respectively realizes the different operating modes of a plurality of indoor sets to make air conditioning system realize refrigeration, heat and refrigerate the operating condition who heats simultaneously, with the different demands that satisfy the customer.

Description

Air conditioning system with cold and hot modes running simultaneously

Technical Field

The utility model relates to an air conditioning technology field particularly, relates to an air conditioning system of cold and hot mode simultaneous operation.

Background

At present, most of air conditioning units can carry out refrigeration or heating so that the ambient temperature meets the needs of people, but the refrigeration and the heating can not be carried out simultaneously. The multi-split air conditioning unit often uses a plurality of indoor units by one outdoor unit, and the operation modes of the plurality of indoor units are required to be the same, so that the outdoor unit is easy to alarm and shut down and lock when the plurality of indoor units operate in the refrigeration and heating modes respectively, or the outdoor unit operates in a primary mode, namely, the refrigeration is started first to perform the refrigeration operation, the heating is started first to perform the heating operation, or the fixed refrigeration or heating mode is performed, and the ventilation is started when the different modes occur. These limitations in the prior art seriously hinder the comfort experience and personality selection of the customer and also affect the utilization rate of the air conditioning unit.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem: the existing air conditioning system cannot simultaneously carry out refrigeration and heating, so that the use comfort is poor.

In order to solve the problem, the utility model provides an air conditioning system of cold and hot mode simultaneous operation, including off-premises station and two at least indoor sets, the off-premises station includes compressor, outdoor heat exchanger and a plurality of cross valves of connecting in parallel setting, wherein, outdoor heat exchanger includes many refrigerant flow paths, every the indoor set all corresponds intercommunication one cross valve and one the refrigerant flow path, the compressor the cross valve the indoor set with outdoor heat exchanger forms refrigerant circulation circuit, and is through a plurality of the cross valve is controlled a plurality ofly respectively refrigerant flow direction in the refrigerant circulation circuit realizes a plurality ofly the different operating modes of indoor set.

From this, through setting up a plurality of cross valves, and a plurality of cross valves are parallelly connected to be set up, set up outdoor heat exchanger including many refrigerant flow paths simultaneously, guarantee that each indoor set all can with the cross valve, outdoor heat exchanger and compressor form solitary refrigerant circulation circuit, make like this as long as control the refrigerant flow direction in a plurality of refrigerant circulation circuits that form respectively through a plurality of cross valves, just can realize the different operating modes of a plurality of indoor sets, thereby make air conditioning system realize refrigeration, heat and the operating condition who heats simultaneously, in order to satisfy customer's different demands.

Optionally, the indoor units include a first indoor unit and a second indoor unit, the first indoor unit includes a first indoor heat exchanger, and a first four-way valve and a first refrigerant flow path are communicated with the first indoor heat exchanger; the second indoor unit comprises a second indoor heat exchanger, a second four-way valve and a second refrigerant flow path are communicated with the second indoor heat exchanger, and different working conditions of the first indoor heat exchanger and the second indoor heat exchanger are realized by switching the conduction states of the first four-way valve and the second four-way valve.

Therefore, the flow direction of the refrigerant in the first refrigerant circulation loop and the flow direction of the refrigerant in the second refrigerant circulation loop are controlled by switching the conduction state of the first four-way valve and the conduction state of the second four-way valve, so that the first indoor heat exchanger and the second indoor heat exchanger can be used as an evaporator or a condenser, and the working state of the indoor unit is adjusted.

Optionally, a port C of the first four-way valve and a port C of the second four-way valve are connected in parallel and then communicated with the outlet of the compressor, and a port a of the first four-way valve and a port a of the second four-way valve are connected in parallel and then communicated with the inlet of the compressor; the D port of the first four-way valve is communicated with the first indoor heat exchanger, the B port of the first four-way valve is communicated with the first refrigerant flow path of the outdoor unit, the D 'port of the second four-way valve is communicated with the second indoor heat exchanger, and the B' port of the second four-way valve is communicated with the second refrigerant flow path of the outdoor unit.

Therefore, after being compressed by the compressor, the refrigerant flows to the first four-way valve and the second four-way valve in two paths, and forms refrigeration loops in the same direction or different directions according to the conduction condition of the four-way valves, so that the single outdoor unit drives the two indoor units to operate in different modes.

Optionally, the port C of the first four-way valve is communicated with the port D, the port a is communicated with the port B, and the compressor, the first four-way valve, the first indoor heat exchanger and the outdoor heat exchanger are sequentially connected in a refrigerant flowing direction to form a heating loop; the port C ' of the second four-way valve is communicated with the port B ' of the second four-way valve, the port A ' of the second four-way valve is communicated with the port D of the second four-way valve, and the compressor, the second four-way valve, the outdoor heat exchanger and the second indoor heat exchanger are sequentially connected along the flow direction of the refrigerant to form a refrigerating circuit.

Therefore, by controlling the first four-way valve to be electrified and the second four-way valve not to be electrified, the effects of heating and refrigerating can be simultaneously provided by one set of air conditioning system, and different requirements of users in the using process are improved; in addition, because the outdoor heat exchanger simultaneously carries out evaporation heat absorption and condensation heat prevention, complementation can be formed, the heat exchange efficiency of the outdoor heat exchanger is improved, and the cooling and heating effect of the indoor side is further improved.

Optionally, the port C of the first four-way valve is communicated with the port B, the port a is communicated with the port D, and the compressor, the first four-way valve, the outdoor heat exchanger and the first indoor heat exchanger are sequentially connected in a refrigerant flowing direction to form a refrigeration circuit; the port C 'of the second four-way valve is communicated with the port D', the port A 'is communicated with the port B', and the compressor, the second four-way valve, the second indoor heat exchanger and the outdoor heat exchanger are sequentially connected along the refrigerant flowing direction to form a heating loop.

Therefore, by controlling the first four-way valve to be not electrified and the second four-way valve to be electrified, the effect that one set of air-conditioning system can provide heating and cooling at the same time is achieved; in addition, because the outdoor heat exchanger simultaneously carries out evaporation heat absorption and condensation heat protection, the heat exchange efficiency of the outdoor heat exchanger can be improved, and the operation energy efficiency of the air conditioning system is improved.

Optionally, the port C of the first four-way valve is communicated with the port B, the port a of the first four-way valve is communicated with the port D of the first four-way valve, and the compressor, the first four-way valve, the outdoor heat exchanger and the first indoor heat exchanger are sequentially connected in a refrigerant flowing direction to form a refrigeration loop; the port C ' of the second four-way valve is communicated with the port B ' of the second four-way valve, the port A ' of the second four-way valve is communicated with the port D of the second four-way valve, and the compressor, the second four-way valve, the outdoor heat exchanger and the second indoor heat exchanger are sequentially connected along the flow direction of the refrigerant to form a refrigerating circuit.

Therefore, the first four-way valve and the second four-way valve are controlled to be powered off, the first indoor heat exchanger and the second indoor heat exchanger are both used as evaporators, and the first refrigerant flow path and the second refrigerant flow path of the outdoor heat exchanger are both condensed to release heat, so that the full-refrigeration working condition of the air-conditioning system is achieved.

Optionally, the port C of the first four-way valve is communicated with the port D, the port a of the first four-way valve is communicated with the port B, and the compressor, the first four-way valve, the first indoor heat exchanger and the outdoor heat exchanger are sequentially connected in a refrigerant flowing direction to form a heating loop; the port C 'of the second four-way valve is communicated with the port D', the port A 'is communicated with the port B', and the compressor, the second four-way valve, the second indoor heat exchanger and the outdoor heat exchanger are sequentially connected along the refrigerant flowing direction to form a heating loop.

Therefore, the first four-way valve and the second four-way valve are controlled to be electrified, so that the first indoor heat exchanger and the second indoor heat exchanger are both used as condensers, and the first refrigerant flow path and the second refrigerant flow path of the outdoor heat exchanger are both used for evaporating heat, thereby achieving the full heating working condition of the air conditioning system.

Optionally, the refrigerant circulation system further comprises an electronic expansion valve, and the electronic expansion valve is arranged on the refrigerant circulation loop. By controlling the flow of the flowing refrigerant, the throttling and pressure reducing effects are achieved, and the operation stability of the air conditioning system is improved.

Optionally, a gas-liquid separator is arranged at an inlet of the compressor so as to separate gas and liquid, and the safe and efficient operation of the air conditioning system is ensured.

Optionally, a connection pipeline between the outdoor unit and the indoor unit and a connection pipeline between the four-way valve and the indoor unit are provided with stop valves to control the on-off of the pipelines.

Drawings

Fig. 1 is a schematic view illustrating a refrigerant flow direction under a mixed working condition of heating and cooling according to an embodiment of the present invention;

fig. 2 is a second schematic diagram illustrating a refrigerant flow direction under a mixed working condition of heating and cooling according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating a refrigerant flow direction under a full refrigeration condition according to an embodiment of the present invention;

fig. 4 illustrates a refrigerant flow direction of the full heating operation mode according to the embodiment of the present invention.

Description of reference numerals:

1-outdoor unit, 11-compressor, 12-outdoor heat exchanger, 121-first refrigerant flow path, 122-second refrigerant flow path, 13-first four-way valve, 14-second four-way valve, 15-gas-liquid separator, 16-stop valve, 2-first indoor unit, 21-first indoor heat exchanger, 22-first electronic expansion valve, 3-second indoor unit, 31-second indoor heat exchanger, 32-second electronic expansion valve.

Detailed Description

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein, without conflict.

A multi-split air conditioner (a multi-split air conditioner) refers to an air conditioner in which a plurality of indoor units share one outdoor unit. At present, the traditional one-driving-multiple air conditioners can only supply cold or heat independently at the same time, but in some special places such as hot pot cities, hotels or offices, the cooling and heating requirements are needed at the same time, if the traditional one-driving-multiple air conditioners can only operate in a single mode, the utilization rate of the air conditioners is reduced, and the use satisfaction of customers is seriously influenced.

In order to solve the problem, the utility model provides an air conditioning system of cold and hot mode simultaneous operation, through set up a plurality of cross valves in the off-premises station, be provided with many refrigerant flow paths with outdoor heat exchanger simultaneously for every indoor set can both be connected with corresponding cross valve and outdoor heat exchanger refrigerant flow path, thereby only through the on-state of control cross valve, just can realize many indoor sets and move different modes respectively, make the use scene of air conditioner more extensive.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Combine as shown in fig. 1, the utility model provides an air conditioning system of cold and hot mode simultaneous operation, including off-premises station 1 and two at least indoor sets, off-premises station 1 includes compressor 11, outdoor heat exchanger 12 and a plurality of cross valves that set up side by side, wherein, outdoor heat exchanger 12 includes many refrigerant flow paths, every indoor set all corresponds cross valve and a refrigerant flow path of intercommunication, compressor 11, the cross valve, indoor set and outdoor heat exchanger 12 form refrigerant circulation circuit, through the refrigerant flow direction in a plurality of refrigerant circulation circuit of a plurality of cross valves control respectively, realize the different operating modes of a plurality of indoor sets.

The working principle of the air conditioner is as follows: the compressor compresses a gaseous refrigerant into a high-temperature high-pressure liquid refrigerant, the high-temperature high-pressure liquid refrigerant is sent to a condenser (outdoor unit) for heat dissipation to form a normal-temperature high-pressure liquid refrigerant, the liquid refrigerant flows into an evaporator (indoor unit) and then is subjected to heat absorption and evaporation, the cycle is a refrigeration mode, hot air is blown out from the outdoor unit at the moment, and cold air is blown out from the indoor unit; when heating, the four-way valve is switched to make the flowing directions of the refrigerant in the condenser and the evaporator opposite to that of the refrigerant in the cooling process, so that cold air is blown during heating, and hot air is blown by the indoor unit.

It can be understood that, in the conventional air conditioner, the four-way valve is provided in the outdoor unit 1 to communicate with the compressor 11. Here, a plurality of cross valves connect in parallel and set up and mean: a plurality of four-way valves are arranged in the outdoor unit 1, and inlet ends of the four-way valves are connected in parallel and then communicated with an outlet of the compressor 11, so that the refrigerant coming out of the compressor 11 is divided into a plurality of parts and flows into the four-way valves respectively; meanwhile, the outlet ends of the four-way valves are connected in parallel and then communicated with the inlet of the compressor 11, so that the refrigerant passing through the refrigerant circulation loop flows out through the outlet ends of the four-way valves, and the refrigerant flowing out of the four-way valves is converged and then enters the compressor to start the next cycle. Therefore, under the connection structure, the flow direction of the refrigerant in the refrigerant circulation loop can be controlled by only controlling the conduction state of each four-way valve, and the heating or cooling mode can be operated.

Therefore, it can be seen that by arranging a plurality of four-way valves connected in parallel, and setting the outdoor heat exchanger 12 to include a plurality of refrigerant flow paths, it is ensured that each indoor unit can form an independent refrigerant circulation loop with the four-way valve, the outdoor heat exchanger 12 and the compressor 11, so that different working conditions of the plurality of indoor units can be realized as long as the refrigerant flow directions in the plurality of refrigerant circulation loops formed are respectively controlled by the plurality of four-way valves, thereby enabling the air conditioning system to realize the working states of refrigeration, heating and simultaneous refrigeration and heating, and meeting different requirements of customers.

The outdoor heat exchanger 12 may be divided into a plurality of portions, each of which is provided with a refrigerant flow path, and the refrigerant flow paths are not interfered with each other; copper pipes of the refrigerant flow paths can be arranged in an inserting mode, so that when the system operates in a different mode, complementation is further formed, and the heat exchange effect is improved; of course, other arrangements may be adopted as long as the outdoor heat exchanger 12 includes a plurality of refrigerant flow paths, and each refrigerant flow path may be separately incorporated into the refrigerant circulation loop of the air conditioning system.

For describing better right the utility model provides an air conditioning system of cold and hot mode simultaneous operation now describes with the unit that 1 outdoor unit 1 drove 2 indoor units.

As shown in fig. 1, the indoor units include a first indoor unit 2 and a second indoor unit 3, the first indoor unit 2 includes a first indoor heat exchanger 21, and a first four-way valve 13 and a first refrigerant flow path 121 are communicated with the first indoor heat exchanger 21; the second indoor unit 3 includes a second indoor heat exchanger 31, a second four-way valve 14 and a second refrigerant flow path 122 communicated with the second indoor heat exchanger 31, and different working conditions of the first indoor heat exchanger 21 and the second indoor heat exchanger 31 are realized by switching the conduction states of the first four-way valve 13 and the second four-way valve.

Specifically, the compressor 11, first four way valve 13, the first refrigerant flow path 121 and the first indoor heat exchanger 21 of outdoor heat exchanger 12 form a first refrigerant circulation loop, the compressor 11, the second four way valve 14, the second refrigerant flow path 122 and the second indoor heat exchanger 31 of outdoor heat exchanger 12 form a second refrigerant circulation loop, switch over through the conducting state to first four way valve 13 and second four way valve 14, control the flow direction of refrigerant in first refrigerant circulation loop and the second refrigerant circulation loop, make first indoor heat exchanger 21 and second indoor heat exchanger 31 can regard as evaporimeter or condenser, thereby adjust the operating condition of indoor set, the utility model provides an air conditioning system can realize refrigeration, heating and three kinds of states of heating simultaneously.

Wherein, first four-way valve 13 includes four ports: an inlet port C, an outlet port A, a normally closed port D and a normally open port B; the first four-way valve 13 includes four ports: an inlet end C 'port, an outlet end A' port, a normally closed end D 'port and a normally open end B' port. The first is that the state of four-way valve circular telegram is: a port C at the inlet end of the four-way valve is communicated with a port D at the normally closed end, and a port A at the outlet end of the four-way valve is communicated with a port B at the normally open end; the first state that the cross valve cuts off the power supply is: the inlet end C port of the four-way valve is communicated with the normally open end B port, and the outlet end A port of the four-way valve is communicated with the normally closed end D port. The power-on and power-off states of the second four-way valve 14 are the same as those of the first four-way valve 13, and will not be described herein again.

Further, a port C of the first four-way valve 13 and a port C 'of the second four-way valve 14 are connected in parallel and then communicated with an outlet of the compressor 11, and a port a of the first four-way valve 13 and a port a' of the second four-way valve 14 are connected in parallel and then communicated with an inlet of the compressor 11; a port D of the first four-way valve 13 communicates with the first indoor heat exchanger 21, a port B of the first four-way valve 13 communicates with the first refrigerant passage 121 of the outdoor unit 1, a port D 'of the second four-way valve 14 communicates with the second indoor heat exchanger 31, and a port B' of the second four-way valve 14 communicates with the second refrigerant passage 122 of the outdoor unit 1.

Therefore, after being compressed by the compressor 11, the refrigerant in the system flows to the first four-way valve 13 and the second four-way valve 14 in two paths, and forms refrigeration loops in the same direction or different directions according to the conduction condition of the four-way valves, so that the single outdoor unit 1 drives the two indoor units to operate in different modes, and the requirements of customers are met.

In addition, the air conditioning system also comprises an electronic expansion valve which is positioned on the refrigerant circulating loop. That is, the electronic expansion valve may be disposed in the indoor unit, or in the outdoor unit, or on a pipe connecting the outdoor unit and the indoor unit, as long as the flow rate of the refrigerant in the refrigerant circulation circuit can be controlled. In the embodiment of the present invention, the electronic expansion valve is disposed in the indoor unit, that is, the first indoor unit 2 further includes a first electronic expansion valve 22, and the first electronic expansion valve 22 is connected in series with the first indoor heat exchanger 21; the second indoor unit 3 further includes a second electronic expansion valve 32, and the second electronic expansion valve 32 is connected in series with the second indoor heat exchanger 31. The electronic expansion valve can control the flow of the refrigerant flowing through, so that the effects of throttling and pressure reduction are achieved, and the operation stability of the air-conditioning system is improved. Of course, in other embodiments, the electronic expansion valve may be disposed on any pipeline forming the refrigerant circulation loop, which is not described herein again.

An oil separator is arranged at the outlet of the compressor 11, and the oil separator separates the refrigerant and the oil discharged by the compressor 11, so that the safe and efficient operation of the device is ensured. The inlet of the compressor 11 is provided with a gas-liquid separator 15, the gas-liquid separator 15 can perform gas-liquid separation, and can also store and supply a refrigerant, so that the refrigerant can be compensated and adjusted when the working condition changes, and the gas-liquid separator 15 can also play a role in filtering dirt.

Furthermore, stop valves 16 are disposed on the connection pipeline between the outdoor unit 1 and the indoor unit and the connection pipeline between the four-way valve and the indoor unit, so as to control the on-off of the pipelines. The stop valve 16 has small friction force between sealing surfaces in the opening and closing processes, is durable, has small opening height, is easy to manufacture and convenient to maintain, and is suitable for low-pressure and high-pressure environments.

The utility model provides an air conditioning system of cold and hot mode simultaneous operation switches through switching on to first cross valve 13, second cross valve 14, realizes the state that air conditioning system refrigerates, heats or refrigerates simultaneously and heats, and the following concrete description respectively grabs the relation of connection under the state:

with reference to fig. 1 and 2, the first state is a simultaneous heating and cooling condition, and there may be two implementation manners:

the first simultaneous heating and cooling working condition is as follows: the first indoor unit 2 heats and the second indoor unit 3 refrigerates, and the method specifically comprises the following steps: the port C of the first four-way valve 13 is communicated with the port D, the port A is communicated with the port B, and the compressor 11, the first four-way valve 13, the first indoor heat exchanger 21 and the outdoor heat exchanger 12 are sequentially connected along the refrigerant flowing direction to form a heating loop; the port C 'and the port B' of the second four-way valve 14 are connected, and the port a 'and the port D' are connected, and the compressor 11, the second four-way valve 14, the outdoor heat exchanger 12, and the second indoor heat exchanger 31 are connected in sequence in the refrigerant flowing direction to form a refrigeration circuit.

In this state, the compressor 11 compresses the refrigerant, a part of the high-temperature and high-pressure refrigerant gas entering the oil-gas separator from the port C flows out through the port D, and enters the first indoor heat exchanger 21 after passing through the stop valve 16, after being condensed into a liquid refrigerant in the first indoor heat exchanger 21, the liquid refrigerant flows to the first refrigerant flow path 121 of the outdoor heat exchanger 12 through the first electronic expansion valve 22, is evaporated in the outdoor heat exchanger 12, and the evaporated refrigerant enters the first four-way valve 13 through the port B, flows out through the port a of the first four-way valve 13, enters the gas-liquid separator 15, and finally returns to the compressor 11, thereby completing a heating cycle. The other part of the high-temperature and high-pressure refrigerant gas entering the second four-way valve 14 from the port C flows out through the port B ' and enters the second refrigerant flow path 122 of the outdoor heat exchanger 12, is condensed into a liquid refrigerant in the outdoor heat exchanger 12, then enters the second indoor heat exchanger 31 through the stop valve 16 and the second electronic expansion valve 32, is evaporated in the second indoor heat exchanger 31, and the evaporated refrigerant enters the second four-way valve 14 through the port D ' and flows out from the port 14A ' of the second four-way valve, joins with the refrigerant flowing out from the port 13A of the first four-way valve, enters the gas-liquid separator 15, and finally returns to the compressor 11 to complete a refrigeration cycle.

Therefore, by controlling the energization of the first four-way valve 13 and the non-energization of the second four-way valve 14, the first indoor heat exchanger 21 is used as a condenser, the second indoor heat exchanger 31 is used as an evaporator, one part (the first refrigerant flow path 121) of the outdoor heat exchanger 12 is evaporated to absorb heat, and the other part (the second refrigerant flow path 122) is condensed to release heat, so that the effects of heating and cooling of one set of air conditioning system can be simultaneously provided, and different requirements of a user in the use process are improved; in addition, because the outdoor heat exchanger 12 simultaneously carries out evaporation heat absorption and condensation heat prevention, complementation can be formed, the heat exchange efficiency of the outdoor heat exchanger 12 is improved, the indoor cooling and heating effect is further improved, and the operation energy efficiency of the air conditioning system is improved.

Referring to fig. 2, the second simultaneous heating and cooling condition is: the port C of the first four-way valve 13 is communicated with the port B, the port A is communicated with the port D, and the compressor 11, the first four-way valve 13, the outdoor heat exchanger 12 and the first indoor heat exchanger 21 are sequentially connected along the refrigerant flowing direction to form a refrigeration loop; the port C 'and the port D' of the second four-way valve 14 are connected, and the port a 'and the port B' are connected, and the compressor 11, the second four-way valve 14, the second indoor heat exchanger 31, and the outdoor heat exchanger 12 are connected in sequence in the refrigerant flowing direction to form a heating circuit.

In this state, the compressor 11 compresses the refrigerant, a part of the high-temperature and high-pressure refrigerant gas entering the first four-way valve 13 from the port C flows out through the port B, enters the first refrigerant flow path 121 of the outdoor heat exchanger 12, condenses into a liquid refrigerant in the outdoor heat exchanger 12, passes through the stop valve 16 and the first electronic expansion valve 22, enters the first indoor heat exchanger 21, evaporates in the first indoor heat exchanger 21, enters the first four-way valve 13 through the port D, flows out from the port a of the first four-way valve 13, joins with the refrigerant flowing out from the port a' of the second four-way valve 14, enters the gas-liquid separator 15, and finally returns to the compressor 11, thereby completing a refrigeration cycle. And a part of the high-temperature and high-pressure refrigerant gas entering the second four-way valve 14 from the port C flows out through the port D ', passes through the stop valve 16, enters the second indoor heat exchanger 31, is condensed into a liquid refrigerant in the second indoor heat exchanger 31, flows to the second refrigerant flow path 122 of the outdoor heat exchanger 12 through the second electronic expansion valve 32, is evaporated in the outdoor heat exchanger 12, and enters the second four-way valve 14 through the port B', flows out from the port a of the second four-way valve 14, joins with the refrigerant flowing out from the port a of the first four-way valve 13, enters the gas-liquid separator 15, and finally returns to the compressor 11 to complete a heating cycle.

Therefore, by controlling the first four-way valve 13 not to be electrified and the second four-way valve 14 to be electrified, the first indoor heat exchanger 21 is used as an evaporator, the second indoor heat exchanger 31 is used as a condenser, one part (the second refrigerant flow path 122) of the outdoor heat exchanger 12 is evaporated to absorb heat, and the other part (the first refrigerant flow path 121) is condensed to release heat, so that the effect that one set of air conditioning system can provide heating and cooling at the same time is achieved, and different requirements of a user in the using process are improved; in addition, because the outdoor heat exchanger 12 simultaneously carries out evaporation heat absorption and condensation heat prevention, complementation can be formed, the heat exchange efficiency of the outdoor heat exchanger 12 is improved, the indoor cooling and heating effect is further improved, and the operation energy efficiency of the air conditioning system is improved.

Referring to fig. 3, the second state is a full-refrigeration operating condition, specifically: the port C of the first four-way valve 13 is communicated with the port B, the port A is communicated with the port D, and the compressor 11, the first four-way valve 13, the outdoor heat exchanger 12 and the first indoor heat exchanger 21 are sequentially connected along the refrigerant flowing direction to form a refrigeration loop; the port C 'and the port B' of the second four-way valve 14 are connected, and the port a 'and the port D' are connected, and the compressor 11, the second four-way valve 14, the outdoor heat exchanger 12, and the second indoor heat exchanger 31 are connected in sequence in the refrigerant flowing direction to form a refrigeration circuit.

In this state, the compressor 11 compresses the refrigerant, a part of the high-temperature and high-pressure refrigerant gas entering the first four-way valve 13 from the port C flows out through the port B, enters the first refrigerant flow path 121 of the outdoor heat exchanger 12, condenses into a liquid refrigerant in the outdoor heat exchanger 12, passes through the stop valve 16 and the first electronic expansion valve 22, enters the first indoor heat exchanger 21, evaporates in the first indoor heat exchanger 21, enters the first four-way valve 13 through the port D, flows out from the port a of the first four-way valve 13, joins with the refrigerant flowing out from the port a' of the second four-way valve 14, enters the gas-liquid separator 15, and finally returns to the compressor 11, thereby completing a refrigeration cycle. A part of the high-temperature and high-pressure refrigerant gas entering the second four-way valve 14 from the port C flows out through the port B ' and enters the second refrigerant flow path 122 of the outdoor heat exchanger 12, is condensed into a liquid refrigerant in the outdoor heat exchanger 12, then enters the second indoor heat exchanger 31 through the stop valve 16 and the second electronic expansion valve 32, is evaporated in the second indoor heat exchanger 31, and the evaporated refrigerant enters the second four-way valve 14 through the port D ' and flows out from the port a ' of the second four-way valve 14, joins with the refrigerant flowing out from the port a of the first four-way valve 13, enters the gas-liquid separator 15, and finally returns to the compressor 11 to complete a refrigeration cycle.

Therefore, by controlling the first four-way valve 13 to be powered off and the second four-way valve 14 to be powered off, the first indoor heat exchanger 21 and the second indoor heat exchanger 31 are both used as evaporators, and the first refrigerant flow path 121 and the second refrigerant flow path 122 of the outdoor heat exchanger 12 are both condensed to release heat, so that the full-refrigeration working condition of the air conditioning system is achieved.

Referring to fig. 4, the third state is a full heating condition, specifically: the port C and the port D of the first four-way valve 13 are communicated, the port A and the port B are communicated, and the compressor 11, the first four-way valve 13, the first indoor heat exchanger 21 and the outdoor heat exchanger 12 are sequentially connected along the refrigerant flowing direction to form a heating loop; the port C 'and the port D' of the second four-way valve 14 are connected, and the port a 'and the port B' are connected, and the compressor 11, the second four-way valve 14, the second indoor heat exchanger 31, and the outdoor heat exchanger 12 are connected in sequence in the refrigerant flowing direction to form a heating circuit.

In this state, the compressor 11 compresses the refrigerant, a part of the high-temperature and high-pressure refrigerant gas entering the oil-gas separator from the port C flows out through the port D, passes through the shutoff valve 16, enters the first indoor heat exchanger 21, condenses into a liquid refrigerant in the first indoor heat exchanger 21, flows to the first refrigerant flow path 121 of the outdoor heat exchanger 12 through the first electronic expansion valve 22, evaporates in the outdoor heat exchanger 12, enters the first four-way valve 13 through the port B, flows out from the port a of the first four-way valve 13, joins with the refrigerant flowing out from the port a' of the second four-way valve 14, enters the gas-liquid separator 15, and finally returns to the compressor 11, thereby completing a heating cycle. And a part of the high-temperature and high-pressure refrigerant gas entering the second four-way valve 14 from the port C flows out through the port D ', passes through the stop valve 16, enters the second indoor heat exchanger 31, is condensed into a liquid refrigerant in the second indoor heat exchanger 31, flows to the second refrigerant flow path 122 of the outdoor heat exchanger 12 through the second electronic expansion valve 32, is evaporated in the outdoor heat exchanger 12, and enters the second four-way valve 14 through the port B', flows out from the port a of the second four-way valve 14, joins with the refrigerant flowing out from the port a of the first four-way valve 13, enters the gas-liquid separator 15, and finally returns to the compressor 11 to complete a heating cycle.

Therefore, by controlling the energization of the first four-way valve 13 and the energization of the second four-way valve 14, both the first indoor heat exchanger 21 and the second indoor heat exchanger 31 are used as condensers, and both the first refrigerant flow path 121 and the second refrigerant flow path 122 of the outdoor heat exchanger 12 evaporate heat, thereby achieving the heating only condition of the air conditioning system.

It should be noted that the embodiment of the present invention describes by taking 1 outdoor unit 1 with 2 indoor units as an example, and can also set up 3, 4 or more indoor units in other embodiments, as long as each indoor unit is satisfied and all corresponds the intercommunication and has a cross valve and a refrigerant flow path, can form independent refrigerant circulation loop, and the operating mode of indoor unit can be switched through controlling the on-state of this cross valve.

The utility model discloses air conditioning system of cold and hot mode simultaneous operation based on the design of a plurality of cross valves, its off-premises station 1 possesses a plurality of refrigerant flow paths, but the arbitrary indoor set independent operation refrigeration of messenger's system and the operating mode that heats to improve air conditioning system's use travelling comfort and system efficiency, enlarged air conditioning system's application scene.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (10)

1. The utility model provides an air conditioning system of cold and hot mode simultaneous operation, its characterized in that, includes off-premises station (1) and two at least indoor sets, off-premises station (1) includes compressor (11), outdoor heat exchanger (12) and a plurality of cross valves that connect in parallel and set up, wherein, outdoor heat exchanger (12) includes many refrigerant flow paths, every the indoor set all corresponds intercommunication one the cross valve and one the refrigerant flow path, compressor (11) the cross valve indoor set with outdoor heat exchanger (12) form refrigerant circulation circuit, through a plurality of the cross valve respectively control a plurality of refrigerant flow direction in the refrigerant circulation circuit realizes a plurality ofly the different operating modes of indoor set.

2. A cold-hot mode simultaneous operation air conditioning system according to claim 1, wherein the plurality of indoor units include a first indoor unit (2) and a second indoor unit (3), the first indoor unit (2) includes a first indoor heat exchanger (21), and a first four-way valve (13) and a first refrigerant flow path (121) are communicated with the first indoor heat exchanger (21); the second indoor unit (3) comprises a second indoor heat exchanger (31), a second four-way valve (14) and a second refrigerant flow path (122) are communicated with the second indoor heat exchanger (31), and different working conditions of the first indoor heat exchanger (21) and the second indoor heat exchanger (31) are realized by switching the conduction states of the first four-way valve (13) and the second four-way valve (14).

3. A cold-hot mode simultaneous operation air conditioning system according to claim 2, wherein a port C of the first four-way valve (13) and a port C of the second four-way valve (14) are connected in parallel and then communicated with the outlet of the compressor (11), and a port a of the first four-way valve (13) and a port a of the second four-way valve (14) are connected in parallel and then communicated with the inlet of the compressor (11); a port D of the first four-way valve (13) is communicated with the first indoor heat exchanger (21), a port B of the first four-way valve (13) is communicated with the first refrigerant flow path (121) of the outdoor unit (1), a port D 'of the second four-way valve (14) is communicated with the second indoor heat exchanger (31), and a port B' of the second four-way valve (14) is communicated with the second refrigerant flow path (122) of the outdoor unit (1).

4. A cold-hot mode simultaneous operation air conditioning system according to claim 3, wherein the port C and the port D of the first four-way valve (13) are connected and the port a and the port B are connected, and the compressor (11), the first four-way valve (13), the first indoor heat exchanger (21) and the outdoor heat exchanger (12) are connected in sequence in a refrigerant circulation direction to form a heating circuit; the port C 'and the port B' of the second four-way valve (14) are communicated, the port A 'and the port D' are communicated, and the compressor (11), the second four-way valve (14), the outdoor heat exchanger (12) and the second indoor heat exchanger (31) are sequentially connected along the refrigerant flowing direction to form a refrigerating circuit.

5. A cold-hot mode simultaneous operation air conditioning system according to claim 3, wherein the port C and the port B of the first four-way valve (13) are connected, the port a and the port D are connected, and the compressor (11), the first four-way valve (13), the outdoor heat exchanger (12) and the first indoor heat exchanger (21) are connected in sequence in a refrigerant circulation direction to form a refrigeration circuit; the port C 'and the port D' of the second four-way valve (14) are communicated, the port A 'and the port B' are communicated, and the compressor (11), the second four-way valve (14), the second indoor heat exchanger (31) and the outdoor heat exchanger (12) are sequentially connected along the refrigerant flowing direction to form a heating loop.

6. A cold-hot mode simultaneous operation air conditioning system according to claim 3, wherein the port C and the port B of the first four-way valve (13) are connected and the port a and the port D are connected, and the compressor (11), the first four-way valve (13), the outdoor heat exchanger (12) and the first indoor heat exchanger (21) are connected in sequence in a refrigerant circulation direction to form a refrigeration circuit; the port C 'and the port B' of the second four-way valve (14) are communicated, the port A 'and the port D' are communicated, and the compressor (11), the second four-way valve (14), the outdoor heat exchanger (12) and the second indoor heat exchanger (31) are sequentially connected along the refrigerant flowing direction to form a refrigerating circuit.

7. A cold-hot mode simultaneous operation air conditioning system according to claim 3, wherein the port C and the port D of the first four-way valve (13) are connected and the port a and the port B are connected, and the compressor (11), the first four-way valve (13), the first indoor heat exchanger (21) and the outdoor heat exchanger (12) are connected in sequence in a refrigerant circulation direction to form a heating circuit; the port C 'and the port D' of the second four-way valve (14) are communicated, the port A 'and the port B' are communicated, and the compressor (11), the second four-way valve (14), the second indoor heat exchanger (31) and the outdoor heat exchanger (12) are sequentially connected along the refrigerant flowing direction to form a heating loop.

8. A cold-hot mode co-operating air conditioning system as claimed in claim 1, further comprising an electronic expansion valve disposed on the refrigerant circulation loop.

9. A simultaneous cold and hot mode air conditioning system according to claim 1, wherein the inlet of the compressor (11) is provided with a gas-liquid separator (15).

10. A cooling-heating mode simultaneous operation air conditioning system as claimed in claim 1, wherein a shut-off valve (16) is provided on a connection pipe between the outdoor unit (1) and the indoor unit and a connection pipe between the four-way valve and the indoor unit.

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