JP2012098017A - Multifunctional heat pump air-conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multifunctional heat pump air-conditioning system.SOLUTION: This multifunctional heat pump air-conditioning system includes a liquid supply device and a heat exchange section, and the heat exchange section changes a flowing direction of a refrigerant according to demand to provide the refrigerant with various heat exchange patterns. This multifunctional heat pump air conditioning system provides heating liquid, cold air, warm air, the combination of heating liquid and cold air, and the combination of heating liquid and warm air, and can be normally operated by a flow direction changing mode even in an unbalanced state of cold demand in an actual situation.

Description

  The present invention relates to a multi-function heat pump air conditioning system, which changes the direction of refrigerant flow and achieves a variety of different heat exchange patterns in the process so that cold air, warm air, heated liquid, cold air and heated liquid can be used as required. Or a combination of heated liquid and warm air, and this one-way change in flow direction relates to a multifunction heat pump air conditioning system that operates normally even in an unbalanced state of cold demand.

  The hot water, cold air, and warm air are indispensable to people's lives, and as many people know, hot water is provided by a heat pump device, and cold air and warm air are provided by an air conditioner. .

  The heat pump device includes a heating device and a water supply device. The water supply device provides water to the heating device, and the heating device raises the water to a specific temperature and supplies it to a person for use.

  The air conditioner includes at least a compressor, an expansion valve, an evaporator, a condenser, a heat radiating device, and a fan. The refrigerant performs heat exchange in each of the evaporator and the condenser, and provides cool air or warm air to the person by blowing air from the fan. The heat dissipating device is for lowering the temperature of the refrigerant. If the air conditioner is highly efficient, the heat dissipating device is water-cooled, and the water in the heat dissipating device is used only for heat exchange with the refrigerant, and water has no other use.

  As described above, the conventional air conditioner and the heat pump device are two independent devices, both of which are restricted in terms of use or price. Although some manufacturers have already developed a system that combines the two, the refrigerant flow rate cannot be controlled when the cooling demand is in an unbalanced state, and the system can only respond when the machine is in off mode, The actual use requirement cannot be satisfied. Also, when the system has already achieved the temperature control condition, the system will automatically stop and cannot make other hot water continuously. Thus, there remains space for improvement in the system.

  In view of the shortcomings of known techniques, an object of the present invention is to provide the following multifunction heat pump air conditioning system. It has the ability to change the direction of refrigerant flow, create various heat exchange patterns for the refrigerant in the system, and provide hot water, warm air, cold air, hot water and warm air combination, hot water and cold air combination And a multi-function heat pump air conditioning system that allows the system to operate normally even when the cooling demand is in an unbalanced state.

  In order to achieve the above-described object, the technical means of the present invention provides a multifunction heat pump air-conditioning system including a heat exchange unit, a liquid supply device, and a control device.

  The heat exchange unit described above includes a compressor, a liquid heat exchanger, a first expansion device, a four-way valve, an outdoor heat exchanger, a second expansion device, an indoor heat exchanger, and a three-way switching valve. The compressor is connected to a liquid heat exchanger by a pipeline, the liquid heat exchanger is connected to a first expansion device by a pipeline, the first expansion device is connected to a four-way valve by a pipeline, and the four-way valve is a pipeline Connected to the outdoor heat exchanger, the outdoor heat exchanger is connected to the second expansion device via a pipeline, the outdoor heat exchanger is equipped with an outdoor fan, and the second expansion device is connected to the indoor heat exchanger via a pipeline The indoor heat exchanger is connected to the four-way valve by a pipeline, the indoor heat exchanger is provided with an indoor fan, and the three-way switching valve is arranged in the pipeline between the second expansion device and the indoor heat exchanger, The switching valve is connected to the pipeline between the four-way valve and the indoor heat exchanger by another pipeline. The first expansion device and the second expansion device are electronic expansion valves.

  The liquid supply device includes a pump, which is connected to a liquid inlet pipe and a liquid discharge pipe, respectively, and the liquid discharge pipe passes through the liquid heat exchanger.

  The liquid supply device further includes a liquid tank, the liquid discharge pipe and the liquid inlet pipe described above are connected to the liquid tank, and the liquid discharge pipe located between the pump and the liquid heat exchanger is connected to a three-way valve. The three-way valve is connected to a liquid discharge pipe located between the liquid heat exchanger and the liquid tank by a liquid discharge auxiliary pipe.

  The control device described above is electrically connected to a pump, a compressor, a liquid heat exchanger, a first expansion device, a four-way valve, an outdoor heat exchanger, a second expansion device, a three-way switching valve, an indoor heat exchanger, and a three-way switching valve. Connecting.

  The multi-function heat pump air conditioning system of the present invention can be summarized as follows.It mainly exchanges heat between the liquid and the refrigerant by a liquid heat exchanger, and increases the temperature of the liquid, lowers the temperature of the refrigerant, and further provides a four-way valve. The flow direction of the refrigerant is changed by the guide of the three-way switching valve to provide heating liquid, cold air, warm air, a combination of heating liquid and warm air, or a combination of cold air and heating liquid as required. In the actual situation, even when the demand is high and the cooling demand is unbalanced, the system that changes the flow direction of the refrigerant can operate the system normally and meet the actual demand. Thus, the necessary heating liquid, cold air, warm air, a combination of heating liquid and warm air, or a combination of cold air and heating liquid is provided.

In the multi-function heat pump air conditioning system of the present invention, it is a flow chart of refrigerant and liquid when the heating liquid load exceeds the cold air load. In the multifunction heat pump air-conditioning system of the present invention, it is a flow chart of refrigerant and liquid when the cold load exceeds the heated liquid load. It is a refrigerant | coolant flow figure when it is only the cold load in the multifunctional heat pump air-conditioning system of this invention. It is a flow diagram of a liquid and a refrigerant when there is only a heating liquid load in the multifunctional heat pump air conditioning system of the present invention. It is a flow figure of the liquid and refrigerant at the time of simultaneous load of heating liquid and warm air in the multifunctional heat pump air-conditioning system of the present invention.

  Next, an implementation method of the present invention will be described based on a specific embodiment. Thereby, those who have general knowledge in this technical field can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

  As shown in FIG. 1, the multifunction heat pump air conditioning system of the present invention includes a liquid supply device 1, a heat exchange unit 2, and a control device 3.

  The liquid supply apparatus 1 includes a selective liquid tank 10 and a pump 11. The pump 11 is connected to the liquid tank 10 by a liquid inlet pipe 12 and a liquid outlet pipe 13. The pump 11 is a variable frequency pump or a fixed frequency pump. And When the pump 11 is a fixed frequency pump, the fixed frequency pump can be additionally provided with a control valve, thereby controlling the circulating flow rate of the liquid supply device.

The heat exchange unit 2 includes a compressor 20, a liquid heat exchanger 21, a first expansion device 22, a four-way valve 23, an outdoor heat exchanger 24, a second expansion device 25, an indoor heat exchanger 26, and a three-way switching valve 27. Prepare.
The compressor 20 is connected to a liquid heat exchanger 21 by a pipeline, the liquid discharge pipe 13 passes through the liquid heat exchanger 21, and the liquid discharge pipe 13 is located between the liquid heat exchanger 21 and the pump 11. Connect to three-way valve 14. The three-way valve 14 is separately connected to a liquid discharge pipe 13 between the liquid tank 10 and the liquid heat exchanger 21 by a liquid discharge auxiliary pipe 15. The liquid heat exchanger 21 is connected to the first expansion device 22 by a pipeline, the first expansion device 22 is connected to the four-way valve 23 by the pipeline, and the four-way valve 23 is further connected to the compressor 20 by the pipeline. The valve 23 is connected to the outdoor heat exchanger 24 and the indoor heat exchanger 26 by two other pipelines. The outdoor heat exchanger 24 is connected to the second expansion device 25 via a pipeline, the second expansion device 25 is connected to the indoor heat exchanger 26 via a pipeline, and the three-way switching valve 27 is connected to the second expansion device 25 via the indoor heat exchange. It arrange | positions in the pipeline connected to the chamber | room 26, and the three-way switching valve 27 is connected to the pipeline which the four-way valve 23 connects to the indoor heat exchanger 26 with a pipeline.
The outdoor heat exchanger 24 includes an outdoor fan 240, and the indoor heat exchanger 26 includes an indoor fan 260. The first expansion device 22 and the second expansion device 25 are electronic expansion valves.

  The control device 3 includes a pump 11, a three-way valve 14, a compressor 20, a first expansion device 22, a four-way valve 23, an outdoor heat exchanger 24, a second expansion device 25, a three-way switching valve 27, and an indoor heat exchanger 26, respectively. Connect electrically.

As shown in FIG. 1, when the heating liquid load exceeds the cold air load, the compressor 20 first gives priority to the heating liquid load.
The liquid in the liquid tank 10 is water or an oil body, and the liquid is sent into the pump 11 via the liquid inlet pipe 12 and sent to the liquid heat exchanger 21 via the liquid discharge pipe 13 by the pump 11. It is done.
The compressor 20 sends the refrigerant into the liquid heat exchanger 21 to cause heat exchange between the liquid and the refrigerant. As the liquid temperature increases, the refrigerant enters the first expansion device 22 and performs the first expansion. The liquid whose temperature has been increased is further returned from the liquid discharge pipe 13 into the liquid tank 10 and stored for use in a later step.

The refrigerant that has undergone the first expansion enters the indoor heat exchanger 26 by the guide of the four-way valve 23 to control the room temperature, and the refrigerant immediately enters the second expansion device 25 and undergoes the second expansion.
The refrigerant that has undergone the second expansion enters the outdoor heat exchanger 24 and absorbs heat energy in the atmosphere, and is then sent to the liquid heat exchanger 21 by the guide of the four-way valve 23 and the transport of the compressor 20. By exchanging heat with the liquid and performing the same process and heat exchange again based on the above, a large amount of heated liquid and a small amount of cold air are provided.
The pump 11 controls the liquid discharge temperature of the heated liquid by changing the rotation speed and changing the flow rate of the liquid in response to the request for the heated liquid temperature. When it is necessary to raise the liquid discharge temperature, heat exchange of a small amount of liquid is performed in the liquid heat exchanger 21 when the pump 11 decreases its rotation speed and decreases the liquid flow rate. On the contrary, when it is necessary to lower the liquid discharge temperature, when the pump 11 increases the rotation speed and increases the liquid flow rate, heat exchange of a large amount of liquid is performed in the liquid heat exchanger 21.

FIG. 2 shows a case where the cold air load exceeds the heated liquid load, and the compressor 20 first gives priority to the cold air load.
The compressor 20 sends the refrigerant into the liquid heat exchanger 21 to cause heat exchange between the liquid and the refrigerant. Since the flow and control pattern of the liquid are as described above, the description is omitted here.
The control device 3 opens the first expansion device 22, and the refrigerant whose temperature has been lowered through the heat exchange described above passes only through the first expansion device 22 and cannot expand in the first expansion device 22. The refrigerant enters the outdoor heat exchanger 24 by the guide of the four-way valve 23, and the rotation of the outdoor fan 240 enhances the heat exchange capability of the outdoor heat exchanger 24.
The refrigerant after heat exchange again enters the second expansion device 25 and expands, and then enters the indoor heat exchanger 26 to lower the indoor temperature. Further, the rotation speed of the indoor fan 260 is set by the user, and the heat exchange capability of the refrigerant in the indoor heat exchanger 26 is enhanced.
The refrigerant further enters the compressor 20 through the guide of the four-way valve 23, is sent into the liquid heat exchanger 21, and the two heat exchange processes of the liquid and the refrigerant are advanced. Replace and provide a large amount of cold air and a small amount of heated liquid. As described above, the pump 11 is used for controlling the liquid discharge temperature in this process.

In the case of only the cold load shown in FIG. 3, when the compressor 20 gives priority to the cold load and the control device 3 stops the operation of the pump 11, the liquid cannot flow in the pipeline.
The refrigerant passes through the open first expansion device 22 and enters the outdoor heat exchanger 24 by the guide of the four-way valve 23 to exchange heat.
The refrigerant expands as soon as it enters the second expansion device 25, and then enters the indoor heat exchanger 26 to perform heat exchange, thereby lowering the indoor temperature.
The refrigerant after heat exchange enters the compressor 20 through the guide of the four-way valve 23, is pressurized and enters the liquid heat exchanger 21, and further passes through the first expansion device 22. The air is exchanged with this process to provide cold air.

In the case of only the heated liquid load shown in FIG. 4, the compressor 20 gives priority to the heated liquid load first, the liquid inlet pipe 12 sends the liquid into the pump 11, and the pump 11 passes the liquid through the liquid discharge pipe 13. The pump 11 is fed into the liquid heat exchanger 21, and as described above, the pump 11 is used for controlling the liquid discharge temperature in this step.
When the refrigerant enters the liquid heat exchanger 21, the refrigerant and the liquid exchange heat, and after the liquid temperature is raised, the refrigerant is sent into the liquid tank 10 via the liquid discharge pipe 13 and used for the subsequent steps. Stored to do.
The refrigerant enters the first expansion device 22 and expands, enters the outdoor heat exchanger 24 by the guide of the four-way valve 23, and performs heat exchange. The control device 3 controls the second expansion device 25 and the three-way switching valve 27, The second expansion device 25 is opened, and the three-way switching valve 27 blocks the passage between the second expansion device 25 and the indoor heat exchanger 26. Further, since the three-way switching valve 27 has the second expansion device 25 and the four-way valve 23 as passages, the refrigerant passes through the second expansion device 25 and then passes through the guides of the three-way switching valve 27 and the four-way valve 23 and then the compressor 20. Then, the refrigerant is further sent into the liquid heat exchanger 21 by the compressor 20, the two of the liquid and the refrigerant are heat-exchanged, and the refrigerant and the liquid provide the heated liquid through the above-described process and heat exchange. .

As shown in FIG. 5, the heat exchange and flow of the liquid are the same as described above when the heated liquid and warm air are simultaneously loaded. The refrigerant and the liquid are heat-exchanged in the liquid heat exchanger 21 to improve the liquid temperature.
The control device 3 opens the first expansion device 22, and the refrigerant whose temperature has been lowered passes through the first expansion device 22, enters the indoor heat exchanger 26 through the guide of the four-way valve 23, and performs heat exchange. To achieve the effect of providing warm air.
The refrigerant enters the second expansion device 25 and expands, and then enters the outdoor heat exchanger 24 for heat exchange. The refrigerant enters the compressor 20 by the guide of the four-way valve 23, and further enters the liquid heat exchanger 21. The refrigerant and the liquid exchange heat, and the refrigerant and the liquid exchange heat with the above-described process to provide the heated liquid and warm air.
In this flow, the pump 11 controls the distribution of the heated liquid and warm air by controlling the rotation speed, and the control device 3 senses that the temperature of the liquid passing through the liquid heat exchanger 21 is too high or the flow rate is too high. Then, the control device 3 activates the three-way valve 14 to divide the liquid into two flow directions, and partly flows to the liquid discharge pipe 13 positioned between the liquid heat exchanger 21 and the liquid tank 10 by the liquid discharge auxiliary pipe 15. The other part flows into the liquid heat exchanger 21 to achieve the effect of controlling the liquid temperature and flow rate.

  What has been described above is merely an example of the present invention, and does not limit the scope of the present invention. That is, any equivalent changes and modifications that can be made based on the scope of the claims of the present invention belong to the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Liquid supply apparatus 10 Liquid tank 11 Pump 12 Liquid entrance pipe 13 Liquid discharge pipe 14 Three-way valve 15 Liquid discharge auxiliary pipe 2 Heat exchange part 20 Compressor 21 Liquid heat exchanger 22 First expansion apparatus 23 Four-way valve 24 Outdoor heat exchanger 240 outdoor fan 25 second expansion device 26 indoor heat exchanger 260 indoor fan 27 three-way selector valve

Claims (5)

In a multi-function heat pump air conditioning system comprising a heat exchange unit, a liquid supply device and a control device,
The heat exchange unit includes a compressor, a liquid heat exchanger, a first expansion device, a four-way valve, an outdoor heat exchanger, a second expansion device, an indoor heat exchanger, a three-way switching valve,
The compressor is connected to a liquid heat exchanger by a pipeline, the liquid discharge pipe is connected to a first expansion device by a pipeline, the first expansion device is connected to a four-way valve by a pipeline, and the four-way valve is a pipeline Connected to the outdoor heat exchanger, the outdoor heat exchanger is connected to the second expansion device by a pipeline, the second expansion device is connected to the indoor heat exchanger by a pipeline, and the indoor heat exchanger is four-way by a pipeline Connected to the valve, the three-way switching valve is arranged in the pipeline between the second expansion device and the indoor heat exchanger, the three-way switching valve is connected to the pipeline between the four-way valve and the indoor heat exchanger in the pipeline,
The liquid supply device includes a pump, the pump connects a liquid inlet pipe and a liquid outlet pipe, the liquid outlet pipe passes through the liquid heat exchanger,
The control device is electrically connected to a pump, a compressor, a first expansion device, a four-way valve, an outdoor heat exchanger, a second expansion device, a three-way switching valve, and an indoor heat exchanger. Multifunctional heat pump air conditioning system as described.   2. The multifunction heat pump air conditioning system according to claim 1, wherein the liquid supply device further includes a liquid tank, and the liquid inlet pipe and the liquid discharge pipe are connected to the liquid tank, respectively.   3. The multifunction heat pump air conditioning system according to claim 2, wherein a three-way valve is connected to a liquid discharge pipe located between the pump and the liquid heat exchanger, and the three-way valve is connected to the liquid heat exchanger and the liquid by a liquid discharge auxiliary pipe. A multifunction heat pump air-conditioning system, wherein a liquid discharge pipe is connected between tanks, and the three-way valve is electrically connected to the control device.   The multifunction heat pump air conditioning system according to claim 1, wherein the indoor heat exchanger includes an indoor fan, and the outdoor heat exchanger includes an outdoor fan.   2. The multifunction heat pump air conditioning system according to claim 1, wherein the first expansion device and the second expansion device are electronic expansion valves.

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