CN109386887A - Air-conditioning device - Google Patents

Abstract

A kind of air-conditioning device, it includes outdoor unit and dehumidifying reheating indoor unit, being avoided that dehumidifying reheating indoor unit, temperature distribution is non-uniform to the air-flow of indoor offer, and give full play to dehumidifying reheating indoor unit except wet heat exchanger and the effect of heat-heat exchanger again.In air-conditioning device of the invention, outdoor unit includes compression mechanism and outdoor heat exchanger, the reheating indoor unit that dehumidifies includes removing wet heat exchanger and the first indoor refrigerant adjusting device, air-conditioning device utilizes suction line, discharge pipe, first piping, second is piped compression mechanism, outdoor heat exchanger, first indoor refrigerant adjusting device is connected with wet heat exchanger is removed, air-conditioning device further includes again heat-heat exchanger, refrigerant adjusting device on the inside of second Room, third piping and bifurcated pipe, the first intersection between the first indoor refrigerant adjusting device and outdoor heat exchanger that third piping is piped first, refrigerant adjusting device on the inside of second Room, heat-heat exchanger and bifurcated pipe are sequentially connected again.

Description

Air conditioner

This application is a divisional application of an invention patent application named "Air Conditioning Device" with the application number of "201410059992.5" submitted by the applicant on February 21, 2014.

technical field

The present invention relates to an air conditioner.

Background technique

With the improvement of people's living standards, people's demand for living environment control has become increasingly prominent. Therefore, the functions of air-conditioning devices have gradually developed from a single temperature adjustment to a diversified development. In humid and rainy areas and in the rainy season, the humidity of the air is high, which makes the human body feel uncomfortable. Therefore, air conditioners with humidity control function have emerged as the times require.

Air conditioning units typically use the following principle for dehumidification: By passing the air through a heat exchanger with a surface temperature below the air dew point, the air is condensed, thereby removing moisture from the air. According to the above dehumidification principle, it can be seen that the lower the surface temperature of the heat exchanger, the better the dehumidification effect. However, although the humidity can be reduced after low-temperature dehumidification, the air temperature also decreases. Therefore, in an environment that requires both dehumidification effect and temperature, such as a bathroom, it is necessary to dehumidify the air and then heat it (hereinafter also referred to as for reheating) to maintain the comfort of the human body.

In order to realize reheating and dehumidification, as shown in FIG. 7 , generally, a structure in which an electric heating unit 29X is added downstream of the air passage of the dehumidifying heat exchanger 21X is adopted. However, the electric heating unit usually uses electric heating elements (such as electric heating wires, etc.) to convert electric energy into heat energy, so that the air can absorb heat when passing through, thereby increasing the outlet air temperature, thus increasing the energy consumption. In addition, the air flow after heat exchange by the electric heating element will cause uneven temperature distribution of the air flow due to uneven heating, which reduces the comfort.

In order to achieve reheating and dehumidification, the structure disclosed in the patent document CN1590890A can also be considered, as shown in FIG. The exchanger 21X1 and the reheating heat exchanger 22X are successively arranged in the air passage, and the throttling device 25X is arranged in the pipeline therebetween. However, when the above-mentioned structure is used for reheating and dehumidification, since the same part of the refrigerant heat is first used for heating and then taken away by the airflow, and then used for cooling, neither the dehumidifying heat exchanger 21X1 nor the reheating heat exchanger 22X is sufficient. To play a role, that is, insufficient dehumidification and insufficient heating.

SUMMARY OF THE INVENTION

The present invention has been made in view of the above problems, and its object is to provide an air conditioner including an outdoor unit and a dehumidifying and reheating indoor unit, which can avoid uneven temperature distribution of the airflow provided by the dehumidifying and reheating indoor unit to the room, and can Make full use of the dehumidification heat exchanger and reheat heat exchanger of the dehumidification and reheat indoor unit.

In order to achieve the above object, the air conditioner of the first aspect of the present invention includes an outdoor unit and a dehumidifying and reheating indoor unit, the outdoor unit includes a compression mechanism and an outdoor heat exchanger, and the dehumidifying and reheating indoor unit includes a dehumidifying heat exchanger and a first heat exchanger. An indoor side refrigerant regulating device, the air conditioning device further comprises: a discharge pipe connected to the discharge side of the compression mechanism, a suction pipe connected to the suction side of the compression mechanism, and sequentially connected to the discharge pipe, the The outdoor heat exchanger, the first indoor side refrigerant conditioning device, the first piping of the dehumidifying heat exchanger, and the second piping connecting the dehumidifying heat exchanger and the suction pipe to form a dehumidifying circuit, The dehumidification and reheating indoor unit further includes a reheat heat exchanger, a second indoor side refrigerant conditioning device, and a thermal cycle device for sending heat or cold energy of the dehumidification and reheating indoor unit into the room, and the air conditioner The device further includes a third pipe connecting a first intersection of the first pipe, the second indoor side refrigerant regulator, the The reheat heat exchanger and the branch pipe are sequentially connected to constitute a reheat circuit, wherein the first intersection is located between the first indoor side refrigerant conditioning device and the outdoor heat exchanger.

The air conditioner according to the second aspect of the present invention is based on the air conditioner according to the first aspect of the present invention, wherein the outdoor unit further includes a first switching device, the first switching device can be switched between the first switching state of the first switching device and the first switching state of the first switching device. A switching device switches between a second switching state, and in the first switching state of the first switching device, the first switching device communicates the first pipe with the suction pipe and makes the second pipe communicate with the suction pipe. The discharge pipe communicates, and in a second switching state of the first switching device, the first switching device communicates the first pipe and the discharge pipe and communicates the second pipe and the suction pipe .

The air conditioner according to the third aspect of the present invention is based on the air conditioner according to the second aspect of the present invention, and the air conditioner further includes a second switching device, the second switching device being able to switch between the first switching state of the second switching device and the first switching state of the second switching device. The two switching devices are switched between the second switching states. In the first switching state of the second switching device, the second switching device communicates the third pipe and the branch pipe. In the second switching state In the second switching state of the device, the second switching device communicates the third pipe and the suction pipe.

The air conditioner of the fourth aspect of the present invention is the air conditioner of the third aspect of the present invention, wherein the first switching device is a four-way valve.

An air conditioner according to a fifth aspect of the present invention is the air conditioner according to the third aspect of the present invention, wherein the second switching device is provided in the outdoor unit.

An air conditioner according to a sixth aspect of the present invention is the air conditioner according to the first aspect of the present invention, wherein the first indoor side refrigerant regulating device and the second indoor side refrigerant regulating device are electric valves or solenoid valves.

An air conditioner according to a seventh aspect of the present invention is based on the air conditioner according to the first aspect of the present invention, wherein the heat cycle device is an air blower, and the dehumidification heat exchanger and the reheat heat exchanger are provided in the in the flow path of the air flow formed by the air blowing device.

An air conditioner according to an eighth aspect of the present invention is the air conditioner according to the seventh aspect of the present invention, wherein the dehumidification heat exchanger is provided on the upstream side or the downstream side of the reheat heat exchanger in the flow path. Or, on the flow path, the dehumidification heat exchanger and the reheat heat exchanger are arranged side by side.

An air conditioner according to a ninth aspect of the present invention is the air conditioner according to the first aspect of the present invention, wherein the suction pipe is provided with a liquid storage device.

An air conditioner according to a tenth aspect of the present invention is the air conditioner according to the first aspect of the present invention, further comprising: a first connecting pipe branched from the second junction of the first pipes; a second connecting pipe branched from the second piping, the second junction is located between the first indoor side refrigerant conditioning device and the outdoor heat exchanger, and the air conditioner further includes a plurality of indoor unit, the plurality of indoor units are connected in parallel on the first connecting pipe and the second connecting pipe.

An air conditioner of an eleventh aspect of the present invention is based on the air conditioner of the first aspect of the present invention, wherein the heat cycle device is a water cycle device, and the dehumidification heat exchanger and the reheat heat exchanger pass through the The circulating water flowing in the water circulation device sends heat or cold into the room.

An air conditioner according to a twelfth aspect of the present invention is the air conditioner according to any one of the first to eleventh aspects of the present invention, wherein the air conditioner includes a plurality of the outdoor units, a plurality of the outdoor units The first pipes of the plurality of outdoor units are joined, the second pipes of the plurality of outdoor units are joined, and the third pipes of the plurality of outdoor units are joined.

A method for controlling an air conditioner according to a thirteenth aspect of the present invention is used to control the air conditioner according to any one of the third to twelfth aspects of the present invention, and the control unit is used to control the air conditioner in the first mode and the second mode. , a third mode and a fourth mode, in which the first switching means is switched to the first switching state of the first switching means, and the second switching means is switched to The second switching device is in a first switching state, and in the second mode, the first switching device is switched to the first switching device second switching state, and the second switching device is switched to all a second switching state of the second switching device, in the third mode, the first switching device is switched to the first switching device second switching state, and the second switching device is switched to the The second switching means is in a first switching state, and in the fourth mode, the first switching means is switched into the first switching means second switching state, and the second switching means is switched into the first switching state The second switching device switches the second state, and stops the operation of the thermal cycler.

An air conditioner according to a fourteenth aspect of the present invention is the control method for an air conditioner according to the thirteenth aspect of the present invention, wherein the air conditioner is caused to perform a defrosting operation in the third mode.

According to the air conditioner of the present invention, while the indoor air is dehumidified by the dehumidification heat exchanger of the dehumidification and reheat indoor unit, the indoor air can be reheated by the reheat heat exchanger of the dehumidification and reheat indoor unit. Therefore, compared with the structure in which the electric heating unit is added downstream of the dehumidification heat exchanger in the air path formed by the indoor fan, the energy consumption can be reduced, and the uneven temperature distribution of the air supplied to the room by the dehumidification and reheating indoor unit can be avoided. , to improve the comfort of indoor occupants. In addition, compared with the structure in which the dehumidification heat exchanger and the reheat heat exchanger, which are connected in series in the indoor refrigerant circuit, are sequentially arranged in the air passage formed by the indoor fan, both the dehumidification heat exchanger and the reheat heat exchanger can be used. Can fully function, thus avoiding insufficient dehumidification and insufficient heating. In addition, since a part of the waste heat originally discharged into the atmosphere from the outdoor unit can be used for the reheat heat exchanger to realize the utilization of waste heat, the energy consumption ratio can be improved, and energy saving and environmental protection can be achieved.

Description of drawings

FIG. 1 is a schematic diagram showing a refrigerant circuit configuration of an air-conditioning apparatus according to Embodiment 1 of the present invention.

2 is a schematic diagram showing a refrigerant circuit configuration of an air-conditioning apparatus according to Embodiment 2 of the present invention.

3 is a schematic diagram showing a refrigerant circuit configuration of an air-conditioning apparatus according to Embodiment 3 of the present invention.

4 is a schematic diagram showing a refrigerant circuit configuration of an air-conditioning apparatus according to Embodiment 4 of the present invention.

5 is a schematic diagram showing a refrigerant circuit configuration of an air-conditioning apparatus according to Embodiment 5 of the present invention.

6 is a schematic diagram showing a modification of the air conditioner of the present invention.

FIG. 7 is a schematic diagram showing the structure of a conventional circuit for reheating and dehumidification.

FIG. 8 is a schematic diagram showing the structure of another conventional circuit for reheating and dehumidification.

(Symbol Description)

1. 1A, 1B, 1C, 1D Air Conditioning Units

100, 100’, 100”100”A Outdoor Unit

11 Compressor

12 Outdoor heat exchanger

13 Outdoor fan

14 Reservoir

200 Dehumidifying and reheating indoor unit

200A indoor unit

200B Indoor Unit

21 Dehumidification heat exchanger

22 Reheat heat exchanger

23 Indoor fan

V1 Four-way switching valve

V2 valve

V3 Four-way switching valve

V4 throttling device

V5 valve

V6 valve

PO discharge pipe

PI suction tube

P1, P1A First piping

P2, P2A Second piping

P3, P3A 3rd piping

P4～P6 branch pipe

P5’ Tube

P7 first connecting pipe

P8 second connecting pipe

K0～K11 points

Detailed ways

Hereinafter, each embodiment of the air conditioner of the present invention will be described with reference to the drawings.

(1) Embodiment 1

First, the basic configuration of the air conditioner 1 according to Embodiment 1 will be described with reference to FIG. 1 .

As shown in FIG. 1 , the air conditioner 1 of the present embodiment includes an outdoor unit 100 and a dehumidifying and reheating indoor unit 200, wherein the outdoor unit 100 includes a compressor 11 as a compression mechanism, an outdoor heat exchanger 12, and an outdoor fan 13. The valve V2 as the outdoor side refrigerant regulating device and the liquid storage tank 14 as the liquid storage device, the dehumidification and reheating indoor unit 200 has the dehumidification heat exchanger 21 as the first indoor heat exchanger and the first indoor heat exchanger Valve V5 of the side refrigerant regulator. Here, an electric valve or a solenoid valve may be used for the valve V5.

In addition, as shown in FIG. 1 , the air conditioner 1 of the present embodiment connects the discharge side of the compressor 11 , the outdoor heat exchanger 12 , the valve V2 , the valve V5 , the dehumidifying heat exchanger 21 , and the accumulator 14 using the first piping group. It is connected to the suction side of the compressor 11 in order to form a dehumidification circuit, wherein the first piping group includes a series-connected discharge pipe PO, a first pipe P1, a second pipe P2 and a suction pipe PI, and the discharge pipe PO Connected to the discharge side of the compressor 11, the first pipe P1 connects the discharge pipe PO, the outdoor heat exchanger 12, the valve V2, the valve V5, and the dehumidification heat exchanger 21 in this order, and the second pipe P2 exchanges dehumidification heat The compressor 21 is connected to a suction pipe PI, which is connected to the suction side of the compressor 11 . Here, the discharge pipe PO extends from the discharge side of the compressor 11 to the point K0 in FIG. 1 , and the first pipe P1 extends from the point K0 in FIG. 1 to the refrigerant flow direction of the dehumidifying heat exchanger 21 (see FIG. 1 ). 1), the second piping P2 extends from the downstream end of the dehumidifying heat exchanger 21 in the refrigerant flow direction to the point K1 in FIG. 1 , and the suction pipe PI extends from the point K1 in FIG. 1 . K1 extends all the way to the suction side of the compressor 11, and the liquid storage tank 14 is provided in the middle of the suction pipe PI.

Next, the characteristic structure of the air conditioner 1 of Embodiment 1 is demonstrated with reference to FIG. 1. FIG.

As shown in FIG. 1 , the dehumidification and reheating indoor unit 200 of the air conditioning apparatus 1 according to the present embodiment includes the dehumidification heat exchanger 21 serving as the first indoor heat exchanger and the valve V5 serving as the first indoor side refrigerant regulating device. It also includes: a reheat heat exchanger 22 as a second indoor heat exchanger; an indoor fan 23 as an air blower as a heat cycle device; and a valve V6 as a second indoor side refrigerant regulating device; The heat exchanger 21 and the reheat heat exchanger 22 are provided in the air circulation path formed by the indoor fan 23 . Here, an electric valve or a solenoid valve may be used for the valve V6. In addition, the dehumidification heat exchanger 21 is provided on the upstream side of the reheat heat exchanger 22 in the air circulation path formed by the indoor fan 23 .

In addition, as shown in FIG. 1 , the air conditioner 1 of the present embodiment is configured by sequentially connecting the middle position of the discharge pipe PO, the reheat heat exchanger 22, the valve V6, and the middle position of the first pipe P1 by the second pipe group. A heat circuit, wherein the second piping group includes a branch pipe P4 and a third pipe P3 connected in series, and the branch pipe P4 branches from a midway position of the discharge pipe PO, and the third pipe P3 connects The branch pipe P4, the reheat heat exchanger 22, the valve V6, and the intermediate positions of the first piping P1 are connected in this order. Here, the branch pipe P4 is branched from the point K2 in FIG. 1 and extends up to the point K4 in FIG. 1 , and the third piping P3 extends from the point K4 in FIG. 1 up to the point between the valve V2 and the valve V5 Point K5 in FIG. 1 (corresponds to the first intersection of the present invention).

In addition, the air conditioner 1 of the present embodiment further includes a control unit (not shown) for controlling the compressor 11 , the outdoor fan 13 , the valve V2 , the indoor fan 23 , the valve V5 , the valve V6 , and the like of the air conditioner 1 . Control the movement of parts.

Based on the above-described configuration, the air conditioning apparatus 1 of the present embodiment can be operated in the dehumidification and reheating operation mode.

Next, the operation performed in the dehumidification and reheating operation mode of the air conditioner 1 of the present embodiment will be described.

After the air conditioner 1 is activated, the compressor 11 of the outdoor unit 100 compresses the refrigerant, and a part of the refrigerant compressed in the compressor 11 and discharged is sent to the outdoor heat exchanger 12, compressed in the compressor 11, and discharged The rest of the refrigerant is then sent to the reheat heat exchanger 22 of the dehumidification and reheat indoor unit 200 .

The refrigerant sent to the outdoor heat exchanger 12 exchanges heat with the outdoor air sent by the outdoor fan 13 in the outdoor heat exchanger 12, and then flows through the valve V2. The refrigerant that has passed through the valve V2 is sent to the dehumidification and reheating indoor unit 200 .

On the other hand, the refrigerant sent to the reheating heat exchanger 22 of the dehumidifying and reheating indoor unit 200 exchanges heat with the indoor air sent by the indoor fan 23 in the reheating heat exchanger 22, and thereby heats the indoor air. Reheating (hereinafter also referred to as reheating). The refrigerant heat-exchanged with the indoor air in the reheat heat exchanger 22 flows through the valve V6, and then merges with the refrigerant sent from the outdoor unit 100 to the dehumidifying and reheating indoor unit 200 via the first pipe P1.

The merged refrigerant flows through the valve V5 of the dehumidification and reheating indoor unit 200, and is then sent to the dehumidification heat exchanger 21, and the refrigerant sent to the dehumidification heat exchanger 21 is combined with the indoor air in the dehumidification heat exchanger 21. The indoor air sent by the fan 23 exchanges heat to dehumidify the indoor air. The refrigerant heat-exchanged with the indoor air in the dehumidification heat exchanger 21 is sent to the outdoor unit 100 and returned to the compressor 11 via the accumulator tank 14 .

According to the air conditioner 1 of the present embodiment, the dehumidifying and reheating indoor unit 200 includes the dehumidifying heat exchanger 21 and the reheating heat exchanger 22 for exchanging heat with the air sent by the indoor fan 23, and the indoor unit 200 is reheated by dehumidification. The dehumidification heat exchanger 21 of the dehumidifying heat exchanger 21 dehumidifies the indoor air sent by the indoor fan, and at the same time, the reheating heat exchanger 22 of the dehumidifying and reheating indoor unit 200 can reheat the indoor air sent by the indoor fan. Therefore, compared with the structure in which the electric heating unit is added downstream of the dehumidification heat exchanger in the air passage formed by the indoor fan, the air conditioner 1 of the present embodiment can reduce energy consumption, and can avoid supplying the indoor unit of dehumidification and reheating into the room. The temperature distribution of the air is uneven, which improves the comfort of indoor occupants. In addition, the air conditioning apparatus 1 of the present embodiment can enable the dehumidification heat exchanger and the reheat heat exchanger, which are connected in series in the indoor refrigerant circuit, to be sequentially provided in the air passage formed by the indoor fan. And the reheat heat exchanger can fully function, so as to avoid insufficient dehumidification and insufficient heating. In addition, since a part of the waste heat originally discharged into the atmosphere from the outdoor unit can be used for the reheat heat exchanger to realize the utilization of waste heat, the energy consumption ratio can be improved, and energy saving and environmental protection can be achieved.

(2) Embodiment 2

FIG. 2 is a schematic diagram showing a circuit configuration of the air conditioner 1A according to Embodiment 2 of the present invention. The air-conditioning apparatus 1A of the present embodiment is basically the same in structure as the air-conditioning apparatus 1 of the above-mentioned first embodiment. Here, the same reference numerals are assigned to the same components as those of the above-mentioned first embodiment, and the differences from those of the above-mentioned first embodiment are denoted by the same reference numerals. The center is explained here.

In the present embodiment, as shown in FIG. 2 , the outdoor unit 100 ′ includes a four-way switching valve V1 as a first switching device, and the four-way switching valve V1 connects the discharge pipe PO, the first pipe P1 , the second pipe P2 and the The suction pipe PI is switchable between a first switching state and a second switching state in which the four-way switching valve V1 communicates the first pipe P1 with the suction pipe PI and makes the second pipe P2 It communicates with the discharge pipe PO, and in the second switching state, the four-way switching valve V1 communicates the first pipe P1 with the discharge pipe PO and communicates the second pipe P2 with the suction pipe PI.

Based on the above configuration, the air conditioner 1A of the present embodiment can operate in the heating mode by switching the four-way switching valve V1 of the outdoor unit 100' to the first switching state, and can operate in the heating mode by switching the four-way switching of the outdoor unit 100' The valve V1 is switched to the second switching state to operate in the dehumidification reheat mode.

Since the operation performed by the air conditioner 1A of the present embodiment in the dehumidification and reheat mode is the same as the operation performed by the air conditioner 1 of the first embodiment described above in the dehumidification and reheat mode, the description thereof is omitted. Here, with reference to FIG. 2 , only the operation performed in the heating mode of the air conditioner 1A of the present embodiment will be described.

In the heating mode, the air conditioner 1A uses the control unit to switch the four-way switching valve V1 of the outdoor unit 100' to the first switching state, so that the first pipe P1 and the suction pipe PI are communicated and the second pipe P2 and the discharge pipe are communicated. PO is connected.

In this state, the compressor 11 of the outdoor unit 100 ′ compresses the refrigerant, and a part of the refrigerant discharged after being compressed in the compressor 11 is sent to the dehumidification heat exchanger 21 of the dehumidification and reheating indoor unit 200 , and is compressed in the dehumidification and reheating indoor unit 200 . The rest of the refrigerant compressed and discharged in the machine 11 is sent to the reheat heat exchanger 22 of the dehumidification and reheat indoor unit 200 .

The refrigerant sent to the dehumidification heat exchanger 21 of the dehumidification and reheating indoor unit 200 exchanges heat with the indoor air sent by the indoor fan 23 in the dehumidification heat exchanger 21, thereby heating the indoor air. After heat exchange with the indoor air in the dehumidification heat exchanger 21, the refrigerant flows through the valve V5.

On the other hand, the refrigerant sent to the reheating heat exchanger 22 of the dehumidifying and reheating indoor unit 200 exchanges heat with the indoor air sent by the indoor fan 23 in the reheating heat exchanger 22, and thereby heats the indoor air. heating. After heat exchange with indoor air in the reheat heat exchanger 22, the refrigerant flows through the valve V6.

The refrigerant that has passed through the valve V5 merges with the refrigerant that has passed through the valve V6, and then is sent to the outdoor unit 100', and flows through the valve V2. The refrigerant that has passed through the valve V2 is sent to the outdoor heat exchanger 12 , where it exchanges heat with the outdoor air sent by the outdoor fan 13 . The refrigerant heat-exchanged with the outdoor air in the outdoor heat exchanger 12 is returned to the compressor 11 via the accumulator tank 14 .

According to the air conditioner 1A of the present embodiment, by switching the four-way switching valve V1 of the outdoor unit 100' to the first switching state, both the dehumidifying heat exchanger 21 and the reheating heat exchanger 22 can function as condensers, so that Heating indoor air. Therefore, the efficiency of the whole machine can be improved.

In addition, according to the air conditioner 1A of the present embodiment, by switching the four-way switching valve V1 of the outdoor unit 100 ′ to the second switching state, as in the above-described first embodiment, the dehumidification heat exchanger of the indoor unit 200 that uses the dehumidification and reheats The indoor air sent by the indoor fan 23 can be reheated by the reheat heat exchanger 22 of the dehumidifying and reheating indoor unit 200 while the indoor air 21 is dehumidified by the indoor fan 23 . Therefore, the air conditioner 1A of the present embodiment can reduce energy consumption and prevent the dehumidification and reheating of the indoor unit from being supplied into the room, compared to the configuration in which the electric heating unit is added downstream of the dehumidification heat exchanger in the air duct formed by the indoor fan. The temperature distribution of the air is uneven, which improves the comfort of indoor occupants. Moreover, compared with the structure in which the dehumidification heat exchanger and the reheat heat exchanger, which are connected in series in the indoor refrigerant circuit, are sequentially provided in the air passage formed by the indoor fan, the air conditioner 1A of the present embodiment can enable the dehumidification heat exchanger And the reheat heat exchanger can fully function, so as to avoid insufficient dehumidification and insufficient heating. In addition, since a part of the waste heat originally discharged into the atmosphere from the outdoor unit can be used for the reheat heat exchanger to realize the utilization of waste heat, the energy consumption ratio can be improved, and energy saving and environmental protection can be achieved.

(3) Embodiment 3

3 is a schematic diagram showing a circuit configuration of an air conditioner 1B according to Embodiment 3 of the present invention. The air-conditioning apparatus 1B of the present embodiment is basically the same in structure as the air-conditioning apparatus 1A of the second embodiment described above, and the same reference numerals are assigned to the same components as those of the second embodiment described above, and the differences from the second embodiment described above are marked with the same reference numerals. The center is explained here.

In the present embodiment, as shown in FIG. 3, the outdoor unit 100" of the air conditioner 1B includes a branch pipe P5, a branch pipe P6, a throttle device V4, and a four-way switching valve V3 as a second switching device. Here , the branch pipe P5 branches from the point K6 in FIG. 3 of the suction pipe PI, the branch pipe P6 branches from the point K3 in FIG. 3 of the branch pipe P5, the throttle device V4 Provided on the branch pipe P6, the four-way switching valve V3 is connected to the third pipe P3, the branch pipe P4, the branch pipe P5 and the branch pipe P6, and can be switched between the first switching state and the second switching state switching, in the first switching state, the four-way switching valve V3 communicates the third piping P3 with the branch pipe P4, and connects the branch pipe P5 and the branch pipe P6 to form a loop, and in the second In the switching state, the four-way switching valve V3 communicates the third pipe P3 and the branch pipe P5, and communicates the branch pipe P4 and the branch pipe P6. In addition, the throttling device V4 is preferably a capillary, so that the accumulation in the four The oil in the switching valve V3 is introduced into the circuit for separation and recovery to prevent the oil accumulation from causing the failure of the four-way switching valve V3.

Based on the above-described configuration, the air conditioner 1B of the present embodiment can switch between the first mode, the second mode, the third mode, and the fourth mode in which the four-way switching valve V1 is switched by the control unit. is switched to the first switching state and the four-way switching valve V3 is switched to the first switching state, and in the second mode, the four-way switching valve V1 is switched to the second switching state and the four-way switching valve V3 is switched to The second switching state. In the third mode, the four-way switching valve V1 is switched to the second switching state and the four-way switching valve V3 is switched to the first switching state. In the fourth mode, the four-way switching The valve V1 is switched to the second switching state and the four-way switching valve V3 is switched to the second switching state, and the indoor fan 23 is stopped.

Since the operation of the air conditioner 1B of the present embodiment in the first mode is the same as the operation of the air conditioner 1A of the second embodiment described above in the heating mode, the operation of the air conditioner 1B of the present embodiment in the third mode This is the same as the operation performed in the dehumidification and reheating mode of the air conditioner 1A according to the second embodiment, so the description thereof is omitted. In addition, since the operation performed by the air conditioner 1B of the present embodiment in the second mode is basically the same as the operation performed in the fourth mode, here, referring to FIG. 3 , only the air conditioner 1B of the present embodiment is performed in the second mode. The operation performed below will be briefly explained.

In the second mode, the air conditioner 1B uses the control unit to switch the four-way switching valve V1 of the outdoor unit 100" to the second switching state, and switches the four-way switching valve V3 of the outdoor unit 100" to the second switching state, so as to The first pipe P1 is communicated with the discharge pipe PO, the second pipe P2 is communicated with the suction pipe PI, and the third pipe P3 is communicated with the branch pipe P5.

In this state, the compressor 11 of the outdoor unit 100 ″ compresses the refrigerant, and the refrigerant compressed in the compressor 11 and discharged is sent to the outdoor heat exchanger 12 . The refrigerant sent to the outdoor heat exchanger 12 The outdoor heat exchanger 12 exchanges heat with the outdoor air sent by the outdoor fan 13, and then flows through the valve V2. The refrigerant that has passed through the valve V2 is sent to the dehumidification and reheating indoor unit 200.

The refrigerant sent to the dehumidification and reheating indoor unit 200 is divided at the point K5 in FIG. 3 , a part of the refrigerant flows through the valve V5 to be sent to the dehumidification heat exchanger 21, and the rest flows through the valve V6 to be sent to the reheater. Heat exchanger 22 .

The refrigerant sent to the dehumidification heat exchanger 21 exchanges heat with the indoor air sent by the indoor fan 23 in the dehumidification heat exchanger 21, thereby cooling the indoor air.

On the other hand, the refrigerant sent to the reheating heat exchanger 22 of the dehumidifying and reheating indoor unit 200 exchanges heat with the indoor air sent by the indoor fan 23 in the reheating heat exchanger 22, and thereby heats the indoor air. refrigeration.

The refrigerant heat-exchanged with the indoor air in the dehumidification heat exchanger 21 and the refrigerant heat-exchanged with the indoor air in the reheat heat exchanger 22 are sent to the outdoor unit 100 ″, and are sent to the outdoor unit 100 ″ in FIG. 3 . The flow merges at point K6 and then returns to the compressor 11 via the accumulator 14 .

According to the air-conditioning apparatus 1B of the present embodiment, by switching to the first mode by the control unit, as in the above-described second embodiment, both the dehumidification heat exchanger 21 and the reheat heat exchanger 22 can function as condensers to cool the indoor space. Air is heated. Therefore, the efficiency of the whole machine can be improved.

In addition, according to the air conditioner 1B of the present embodiment, by switching to the third mode by the control unit, as in the above-described first embodiment, the dehumidification heat exchanger 21 of the dehumidification and reheating indoor unit 200 is used for the dehumidification heat exchanger 21 of the indoor fan 23 to the indoor fan. Simultaneously with the dehumidification of the indoor air, the indoor air sent by the indoor fan 23 can be reheated by the reheat heat exchanger 22 of the dehumidification and reheating indoor unit 200 . Therefore, the air conditioner 1B of the present embodiment can reduce energy consumption and prevent the supply of dehumidification and reheating indoor units into the room, as compared with the structure in which the electric heating unit is added downstream of the dehumidification heat exchanger in the air passage formed by the indoor fan. The temperature distribution of the air is uneven, which improves the comfort of indoor occupants. In addition, the air conditioner 1B of the present embodiment can enable the dehumidification heat exchanger and the reheat heat exchanger, which are connected in series in the indoor refrigerant circuit, to be sequentially provided in the air passage formed by the indoor fan. And the reheat heat exchanger can fully function, so as to avoid insufficient dehumidification and insufficient heating. In addition, since a part of the waste heat originally discharged into the atmosphere from the outdoor unit can be used for the reheat heat exchanger to realize the utilization of waste heat, the energy consumption ratio can be improved, and energy saving and environmental protection can be achieved.

In addition, after the air conditioner 1B of the present embodiment is operated in the first mode for a period of time, the outdoor unit 100" will form frost, resulting in a decrease in system efficiency. However, in the air conditioner 1B of the present embodiment, the first mode is operated in the first mode. After a period of time, it is possible to switch to the third mode in which the dehumidification heat exchanger 21 functions as an evaporator and the reheat heat exchanger 22 functions as a condenser to perform defrosting or the dehumidification heat exchanger 21 and the reheat heat exchanger 22 The fourth mode (hereinafter, the third mode and the fourth mode are also referred to as the defrost mode, the third mode is also referred to as the first defrost mode, and the fourth mode is also referred to as the second mode). Defrosting mode). In addition, when the air conditioner 1B of the present embodiment switches to the second defrosting mode for defrosting, the indoor fan 23 is stopped, so that the indoor temperature can be prevented from being lowered and the comfort of the indoor occupants is prevented, but it does not Limited to this, when both the dehumidifying heat exchanger 21 and the reheating heat exchanger 22 function as evaporators for defrosting, the indoor fan 23 can be operated at a low speed to supply a weak airflow into the room. When the air conditioner 1B of the present embodiment is switched to the first defrosting mode for defrosting, the dehumidifying heat exchanger 21 functions as an evaporator and the reheat heat exchanger 22 functions as a condenser, and the defrosting speed is higher than that of the second defrosting. The mode is slow, but the reheating heat exchanger 22 plays the role of reheating, and the indoor fan 23 can continue to operate without blowing cold air into the room. Therefore, constant temperature defrosting can be realized.

In addition, in the air-conditioning apparatus 1B of the present embodiment, the control unit may be based on sensors provided therein (for example, a temperature sensor provided in the dehumidification and reheating indoor unit 200 for detecting indoor temperature, outlet air temperature, or heat exchange temperature, and a temperature sensor for detecting indoor temperature) The humidity sensor of humidity or outlet air humidity, the data collected by the temperature sensor installed in the outdoor unit 100" to detect the outdoor temperature or heat exchange temperature) or the parameters set by the user, determine whether it is necessary to enter or exit the defrost mode and enter the first A defrost mode or a second defrost mode.

In addition, in the air conditioner 1B of the present embodiment, a preset instruction may be preset in the control unit to enter the defrost mode after operating in the first mode for a fixed period of time, and exit the defrost mode after operating for another fixed period of time. For example, when operating in the 1st mode, it switches to the defrost mode every 30 minutes, and after operating for 1 minute, it switches back to the 1st mode again.

(4) Embodiment 4

4 is a schematic diagram showing a circuit configuration of an air conditioner 1C according to Embodiment 4 of the present invention. The air conditioner 1C of the present embodiment is basically the same in structure as the air conditioner 1B of the third embodiment. Here, the same reference numerals are assigned to the same components as those of the third embodiment, and the differences from the third embodiment are different from those of the third embodiment. The center is explained here.

In the present embodiment, as shown in FIG. 4 , the air conditioner 1C further includes a first connection pipe P7 branched from the first pipe P1 and a second connection pipe P8 branched from the second pipe P2. Here, the first connecting pipe P7 branches from a point K7 in FIG. 4 of the first piping P1 (corresponding to the second intersection in the present invention), and the point K7 is located between the valve V5 and the outdoor heat exchanger 12 More specifically, the point K7 is located between the valve V5 and the valve V2, and the second connecting pipe P8 is branched from the point K8 in FIG. 4 of the second piping P2.

In addition, in the present embodiment, as shown in FIG. 4 , the air conditioner 1C further includes two indoor units 200A, 200B each having a heat exchanger and an expansion device, and the two indoor units 200A, 200B are connected in parallel to the first On the connecting pipe P7 and the second connecting pipe P8.

According to the air-conditioning apparatus 1C of the present embodiment, the same technical effects as those of the air-conditioning apparatus 1B of the third embodiment described above can be achieved.

(5) Embodiment 5

5 is a schematic diagram showing a circuit configuration of an air conditioner 1D according to Embodiment 5 of the present invention. The air conditioner 1D of the present embodiment is basically the same in structure as the air conditioner 1C of the fourth embodiment described above, and the same reference numerals are assigned to the same components as those of the fourth embodiment described above, and the differences from the fourth embodiment described above are denoted by the same reference numerals. The center is explained here.

In the present embodiment, as shown in FIG. 5 , the air conditioner 1D includes an outdoor unit 100 ″A having the same structure as the outdoor unit 100 ″ in addition to the outdoor unit 100 ″.

In addition, in the present embodiment, as shown in FIG. 5 , the first piping P1 of the outdoor unit 100 ″ and the first piping P1A of the outdoor unit 100 ″A converge, and the second piping P2 of the outdoor unit 100 ″ and the outdoor unit 100 ″ The second piping P2A of A merges, and the third piping P3 of the outdoor unit 100"A merges with the third piping P3A of the outdoor unit 100"A. Here, the first piping P1 of the outdoor unit 100" and the first piping P1A of the outdoor unit 100"A converge at point K9 in FIG. 5, and the second piping P2 of the outdoor unit 100"A and the first piping P2 of the outdoor unit 100"A The second piping P2A converges at point K10 in FIG. 5 , and the third piping P3 of the outdoor unit 100 ″ and the third piping P3A of the outdoor unit 100 ″A converge at point K11 in FIG. 5 .

According to the air conditioner 1D of the present embodiment, the same technical effects as those of the air conditioner 1D of the third embodiment described above can be achieved.

(6) Other Embodiments

The specific embodiments of the present invention have been described above, but it should be understood that the above-mentioned specific embodiments do not limit the present invention, and those skilled in the art can make various modifications on the basis of the above disclosure without exceeding the scope of the present invention. scope.

For example, in Embodiments 1 to 5 described above, the dehumidification heat exchanger 21 is provided on the upstream side of the reheat heat exchanger 22 in the air flow path formed by the indoor fan 23, and heats the air before heating the air. For dehumidification, but not limited to this, a dehumidification heat exchanger may be installed on the downstream side of the reheat heat exchanger in the air circulation path formed by the indoor fan, and the air is heated and then dehumidified. The function of the reheat heat exchanger in this arrangement is not to reheat, so the reheat heat exchanger in the present invention does not specifically refer to and limit its relative position to the dehumidification heat exchanger in the air passage. In addition, the dehumidifying heat exchanger and the reheating heat exchanger may be arranged side by side on the air circulation path formed by the indoor fan, so that a part of the air is dehumidified and another part of the air is heated. In addition, the dehumidifying heat exchanger and the reheating heat exchanger are not limited to being arranged on the air circulation path formed by the indoor fan. For example, a water circulation device may be used for heat exchange. /or around the reheat heat exchanger, a water circulation pipeline for heat exchange is arranged with the reheat heat exchanger, and heat or cold energy is sent into the room through the circulating water circulating in the pipeline.

In addition, in the above-mentioned Embodiment 1, the outdoor unit 100 includes the valve V2 as the outdoor side refrigerant regulating device, but it is not limited to this, and the valve V2 may be omitted.

In addition, in the above-described third embodiment, an electric valve or a solenoid valve may be used as the throttle device V4 in addition to the capillary tube.

In addition, in the above-mentioned Embodiment 3, the four-way switching valve V3 as the second switching device is provided in the outdoor unit 100" of the air conditioner 1B, and the structure of the air conditioner 1B becomes compact, which contributes to downsizing, but does not Limited to this, the four-way switching valve V3 may be provided in the dehumidification and reheating indoor unit 200 , and may also be provided between the outdoor unit 100 ″ and the dehumidifying and reheating indoor unit 200 .

In addition, in the said Embodiment 3, although the 4-way switching valve V3 was used as a 2nd switching means, it is not limited to this, You may use a 3-way valve instead of the said 4-way switching valve V3. In this case, the branch pipe P6 and the throttle device V4 in the above-described third embodiment are omitted, and the three-way valve can be connected so that the first switching state in which the third pipe P3 and the branch pipe P4 can communicate with each other is It is sufficient to switch between the second switching states in which the three pipes P3 and the branch pipe P5 communicate with each other.

In addition, in the above-mentioned Embodiment 3, the branch pipe P5 is branched from the point K6 in FIG. 3 of the suction pipe PI, but it is not limited to this. As shown in FIG. 6, one end may be connected to the valve V3, The branch pipe P5 is replaced by a pipe P5' whose other end is connected to the liquid storage tank 14. Of course, this structure can also be applied to the structures shown in FIGS. 4 and 5 .

In addition, in the above-mentioned Embodiment 4, the two indoor units, the indoor unit 200A and the indoor unit 200B, are connected in parallel to the first connection pipe P7 and the second connection pipe P8. On P7 and the second connecting pipe P8, only one indoor unit may be connected, or three or more indoor units may be connected in parallel.

In addition, in Embodiment 4 described above, the indoor unit A and the indoor unit B have the same configuration, but the present invention is not limited to this, and the configurations of the indoor unit 200A and the indoor unit 200B may be different.

In addition, in the above-mentioned Embodiment 5, the two outdoor units, the outdoor unit 100" and the outdoor unit 100"A in which the first to third pipes are merged, respectively, are included, but the present invention is not limited to this. Three or more outdoor units in which the third piping is confluent, respectively.

In addition, in the fifth embodiment described above, the outdoor unit 100" and the outdoor unit 100"A have the same structure, but the present invention is not limited to this, and the structures of the outdoor unit 100" and the outdoor unit 100"A may be different.

In addition, in the above-mentioned Embodiment 1 to Embodiment 5, the liquid storage tank 14 as the liquid storage device is provided in the suction pipe PI, but the liquid storage tank 14 is not limited to this, and the liquid storage tank may be omitted.

In addition, although not shown, in the above-mentioned Embodiments 1 to 5, the branch pipes in the circuit can use branch pipe fittings, such as Y-shaped adapters, or directly drill holes on the pipes and then weld them.

In addition, the structures in the above-mentioned Embodiments 1 to 5 may be combined with each other as long as there is no contradiction, or some of the constituent parts may be deleted.

Claims (14)

1. An air conditioning apparatus comprising an outdoor unit and a dehumidification-reheat indoor unit, the outdoor unit including a compression mechanism and an outdoor heat exchanger, the dehumidification-reheat indoor unit including a dehumidification heat exchanger and a first indoor-side refrigerant conditioning device, the air conditioning apparatus further comprising: a discharge pipe connected to a discharge side of the compression mechanism, an intake pipe connected to an intake side of the compression mechanism, a first pipe connecting the discharge pipe, the outdoor heat exchanger, the first indoor-side refrigerant conditioning device, the dehumidifying heat exchanger, and a second pipe connecting the dehumidifying heat exchanger and the intake pipe in this order to constitute a dehumidifying circuit,

the dehumidification and reheating indoor unit also comprises a reheating heat exchanger, a second indoor side refrigerant regulating device and a heat circulating device used for sending the heat or the cold of the dehumidification and reheating indoor unit into the room,

the air conditioner further includes a third pipe that forms a reheat circuit by connecting a first junction of the first pipe between the first indoor-side refrigerant conditioning device and the outdoor heat exchanger, the second indoor-side refrigerant conditioning device, the reheat heat exchanger, and the branch pipe in this order, and a branch pipe that branches from the discharge pipe.

2. The air conditioner according to claim 1,

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

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

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

3. The air conditioner according to claim 2,

the air conditioning unit further comprises a second switching device which is switchable between a second switching device first switching state and a second switching device second switching state,

the second switching device causes the third pipe and the branch pipe to communicate with each other in a first switching state of the second switching device,

in a second switching state of the second switching device, the second switching device communicates the third pipe with the suction pipe.

4. Air conditioning unit according to claim 3,

the first switching device is a four-way valve.

5. Air conditioning unit according to claim 3,

the second switching device is provided in the outdoor unit.

6. The air conditioner according to claim 1,

the first indoor-side refrigerant adjusting device and the second indoor-side refrigerant adjusting device are electric valves or electromagnetic valves.

7. The air conditioner according to claim 1,

the heat cycle device is an air blowing device, and the dehumidification heat exchanger and the reheat heat exchanger are provided in a flow path of an air flow formed by the air blowing device.

8. The air conditioner according to claim 7,

the circulation path is provided with the dehumidification heat exchanger on the upstream side or the downstream side of the reheat heat exchanger,

or,

the dehumidification heat exchanger and the reheat heat exchanger are arranged side by side on the circulation path.

9. The air conditioner according to claim 1,

a liquid storage device is arranged on the suction pipe.

10. The air conditioner according to claim 1,

the air conditioning apparatus further includes: a first connection pipe branched from a second intersection of the first pipe, the second intersection being located between the first indoor-side refrigerant conditioning device and the outdoor heat exchanger,

the air conditioning device further includes a plurality of indoor units connected in parallel to the first connection pipe and the second connection pipe.

11. The air conditioner according to claim 1,

the heat cycle device is a water cycle device, and the dehumidification heat exchanger and the reheating heat exchanger send heat or cold to the indoor through circulating water flowing in the water cycle device.

12. Air conditioning unit according to any one of claims 1 to 11,

the air conditioning apparatus includes a plurality of the outdoor units,

the first pipes of the plurality of outdoor units converge,

the second pipes of the plurality of outdoor units converge,

the third pipes of the plurality of outdoor units converge.

13. A control method of an air conditioner for controlling the air conditioner according to any one of claims 3 to 12,

switching the air conditioner between a first mode, a second mode, a third mode and a fourth mode using a control unit,

in the first mode, the first switching device is switched to the first switching device first switching state and the second switching device is switched to the second switching device first switching state,

in the second mode, the first switching device is switched to the first switching device second switching state and the second switching device is switched to the second switching device second switching state,

in the third mode, the first switching device is switched to the first switching device second switching state and the second switching device is switched to the second switching device first switching state,

in the fourth mode, the first switching device is switched to the first switching device second switching state, and the second switching device is switched to the second switching device second switching state, and the heat cycle device is stopped from operating.

14. The control method of an air conditioner according to claim 13,

in the third mode, the air conditioner is operated to perform a defrosting operation.