JP2004077040A - Heat pump air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make all ventilation/external air treatment, cooling and heating able to be carried out with a heat pump and to make no auxiliary facility such as a heat source machine separately required. <P>SOLUTION: The heat pump air conditioning system is provided with a heat pump type external adjuster B for feeding external air to an indoor air conditioning zone E; and a heat pump type heat recovery circulation air conditioner A for circulating and feeding air in the air conditioning zone E and discharging a part of air in the air conditioning zone E to the outdoor. And, an evaporator 5, a condenser 6 and a compressor constituting a coolant circulation circuit D; an evaporation blast passage 16 in which the evaporator 5 passed through with external air for feeding air to the air conditioning zone is provided; and a condensation blast passage 17 in which the condenser 6 passed through with external air for condensing is provided are provided in a casing of the external adjuster B. And also, an evaporator 2, a condenser 3 and a compressor constituting a coolant circulation circuit C; an air feeding blast passage 14 in which the evaporator 2 passed through with the circulation air in the air conditioning zone E is provided; and an air discharge blast passage 15 in which the condenser 3 passed through with the air for discharge and heat recovery in the air conditioning zone E is provided are provided in a casing of the air conditioner A. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat pump air conditioning system.
[0002]
[Prior art]
Conventionally, a heat pump type room air conditioner only needs to perform air-conditioning operation and perform outside air processing with another device. Further, the return air is supplied with heat by exchanging heat with the evaporator of the indoor unit, and the refrigerant that has exchanged heat with the evaporator is exchanged with outside air blown to the condenser of the outdoor unit.
[0003]
[Problems to be solved by the invention]
Therefore, equipment cost for equipment for treating outside air is extra, and piping work for connecting the indoor unit and the outdoor unit is required. Further, since the condenser exchanges heat with the outside air, the efficiency is low, and the use of the condenser in extremely cold or extremely hot places is limited. Then, it aims at providing the heat pump air conditioning system which solves these problems.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a heat pump type external air conditioner that supplies outside air to an indoor air conditioning zone, and circulates air in the indoor air conditioning zone to supply air. A heat pump type heat recovery circulation air conditioner that exhausts a part of the air to the outside, and an evaporator, a condenser, a compressor, and an indoor air conditioning zone that constitute an external adjustment refrigerant circulation circuit in a casing of the external control device. An evaporative air passage provided with the external conditioning evaporator through which the outside air for air supply passes, and a condensation air passage provided with the external conditioning condenser through which the outside air for condensation passes, inside the casing of the heat recovery circulation air conditioner. An air-conditioning refrigerant circulation circuit, an evaporator, a condenser, and a compressor; an air-conditioning evaporator provided with the air-conditioning evaporator through which the circulating air in the indoor air-conditioning zone is provided; Air-conditioning condensation through which the recovery air passes And an exhaust air passage which is provided, comprising a. The outside air conditioner has an augmenting means for controlling the air volume of the blower in the condensing air passage according to the heat load. The refrigerant circuit for air conditioning is configured to be able to be taken out and stored in the casing of the heat recovery circulation air conditioner, and the refrigerant circuit for external conditioning is configured to be able to be taken out and stored in the casing of the external conditioning machine. The fin tubes of the evaporator and the condenser of the refrigerant circuit for air conditioning and the refrigerant circuit for external conditioning were configured by elliptic tubes.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 3 show an embodiment of a heat pump air conditioning system according to the present invention, in which a heat pump type air conditioner B for supplying outside air to an indoor air conditioning zone E and circulating air in the indoor air conditioning zone E are shown. A heat recovery circulation air conditioner A of a heat pump type for supplying air and exhausting a part of the air in the indoor air conditioning zone E to the outside. An evaporator 5, a condenser 6 and a compressor 7 constituting the circuit D, an evaporative air passage 16 provided with the external conditioning evaporator 5 through which the external air for supplying air to the indoor air conditioning zone is provided, and the external conditioning through which the condensing external air passes. An evaporator 2, a condenser 3, and a compressor 4, which constitute a refrigerant circuit C for air conditioning, in a casing 1 of the heat recovery and circulating air conditioner A. The air-conditioning evaporation through which the circulating air in the indoor air-conditioning zone E passes. 2 an air supply air passage 14 provided with, a, and the indoor air conditioning zone exhaust air passage 15 provided with the air-conditioning condenser 3 through the exhaust and the heat recovery air in E. Among the indoor air-conditioning zones E such as offices and kitchens, kitchens are provided with an exhaust port for local exhaust, an exhaust fan, a ventilation fan 20, and the like. Solid and dotted outline arrows indicate the direction of air flow.
[0006]
An air supply fan 11 is provided in an air supply passage 14 of the heat recovery circulation air conditioner A, and an exhaust fan 12 is provided in an exhaust air passage 15. The air inlet and the air outlet of the air supply passage 14 are connected to the indoor air conditioning zone E. The air inlet of the exhaust air passage 15 is connected to the indoor air conditioning zone E, and the air outlet of the exhaust air passage 15 is connected to the outside. The evaporation blower 9 is provided in the evaporative air passage 16 of the outside air conditioner B, and the condensed air blower 10 is provided in the condensation air blow passage 17. The air inlet of the evaporative air passage 16 is made to communicate with the outside, and the air outlet of the evaporative air passage 16 is made to communicate with the indoor air conditioning zone E. The air inlet and the air outlet of the condensing air passage 17 communicate with the outside.
The refrigerant circulation circuit C of the heat recovery circulation air conditioner A is configured by connecting pipes of an evaporator 2, a condenser 3, a compressor 4, a liquid receiver (not shown), an expansion valve, a switching valve for a refrigerant circulation direction, and the like. The heat absorption and the heat radiation of the condenser 2 and the condenser 3 can be switched freely. The refrigerant circulation circuit D of the external conditioner B is formed by connecting pipes of an evaporator 5, a condenser 6, a compressor 7, a liquid receiver (not shown), an expansion valve, a refrigerant circulation direction switching valve, and the like. In addition, the heat absorption and the heat radiation of the condenser 6 can be switched. The fin tubes 19 of the condensers 3 and 6 and the evaporators 2 and 5 are preferably formed of low pressure loss elliptical tubes (see FIG. 5), but may be circular tubes. The refrigerant circulation circuits C and D are configured to be able to be taken out and stored in the casings 1 and 8, respectively. For example, in the heat recovery circulation air conditioner A, the refrigerant circulation circuit C is fixed to and integrated with a frame 13 which is detachably mounted in the casing 1, and an opening is formed on one surface of the casing 1. The frame 13 with the refrigerant circulation circuit can be taken out and housed. The opening is provided with a detachable or openable / closable exterior plate. Similarly, the external controller B is configured to be freely taken out and stored using the frame 18 and the like. It is to be noted that the refrigerant circulation circuits C and D may be provided so as to be freely taken out and stored in a configuration other than the above. The heat recovery circulating air conditioner A and the external air conditioner B can have the same internal structure, so that parts can be used in common. Machine.
[0008]
The blowers 11, 12, 9, 10 of the heat recovery / circulation air conditioner A and the external conditioner B are configured to be able to control the air volume (blade rotation speed), and the compressors 4, 7 are also configured to be able to control the capacity. The heat recovery and circulation air conditioner A performs stepwise or proportional control of the air volume of the condensing fan 12 and the evaporating fan 11 and the capacity control of the compressor 4 in accordance with the fluctuation of the heat load. For example, when the cooling load or the heating load increases, the condenser air volume, the evaporator air volume, and the compressor capacity are appropriately increased, and when the cooling load or the heating load decreases, the condenser air volume, the evaporator air volume, and the compressor capacity are appropriately reduced. In the heat recovery and circulation air conditioner A, the air (return air) in the indoor air conditioning zone E taken into the air supply ventilation passage 14 exchanges heat with the refrigerant flowing through the evaporator 2 and is supplied to the indoor air conditioning zone E for circulation. At the same time, the refrigerant flowing through the condenser 3 exchanges heat with the air (return air) in the indoor air-conditioning zone E taken into the exhaust air passage 15 to absorb or radiate heat and exhaust to the outside. In this way, the heat exchange load of the condenser 3 can be reduced by using the return air heat, and the effect as if using the total heat exchanger can be obtained in the condenser 3.
[0009]
In the air conditioner B, the outdoor air (outside air) taken into the evaporative air passage 16 is heat-exchanged with the refrigerant flowing through the evaporator 5 to supply air to the indoor air conditioning zone E, and at the same time, the outdoor air taken into the condensing air passage 17. The refrigerant flowing through the condenser 6 exchanges heat with air (outside air) to absorb or radiate heat and is exhausted outdoors. At this time, the air supplied to the kitchen is locally exhausted by the ventilation fan 20 or the like. The external conditioner B is provided with an augmenting means for controlling the air flow of the blower 10 in the condensing air passage 17 in accordance with the fluctuation of the heat load. By increasing the air flow of the condenser, the heat amount exceeding the performance limit of the compressor 7 is obtained. And improve the coefficient of performance (COP). In the case where the heat load is reduced and the compressor capacity is reduced, a blower having a constant air volume wastefully consumes blower power, but in the present invention, the airflow of the blower can be reduced to save energy. In addition, compared to the case where the air volume is controlled by operating / stopping a plurality of blowers, the capacity can be finely adjusted at low cost.
[0010]
Further, in the heat recovery and circulation air conditioner A, a reheater 20 is provided downstream of the evaporator 2, and a part of the refrigerant (hot gas) flowing to the condenser 3 is bypassed to the reheater 20 to supercool, dehumidify, The air conditioning refrigerant circuit C can be freely reheated. By supplying so-called dry air produced therefrom, it is possible to prevent discomfort caused by excessive cooling and to keep the kitchen dry. In addition, a separate heating source is not required, and the load on the condenser is reduced to save energy. Also in the external conditioner B, a reheater 21 is provided downstream of the evaporator 5 and a part of the refrigerant (hot gas) flowing to the condenser 6 is bypassed to the reheater 21 to allow supercooling, dehumidification, and reheating. It is also possible to freely configure the external conditioning refrigerant circulation circuit D. In the illustrated example, the external controller B is of the indoor installation type, but may be of the outdoor installation type as shown in FIG. Further, an underfloor type in which the air supply to the heat recovery circulation air conditioner A and the external conditioner B is performed from under the floor may be freely adopted. The other configuration is the same as that of the above embodiment, and the description is omitted.
[0011]
【The invention's effect】
According to the first aspect of the present invention, all of the ventilation / outside air processing and cooling / heating of the indoor air-conditioning zone can be performed by the heat pump, and additional equipment such as a heat source unit is not required separately, so that equipment cost can be reduced. Both the heat recovery circulation air conditioner and the external air conditioner have a refrigerant circulation circuit integrally provided in the casing, so that refrigerant piping work after installation is not required, construction is simple, and indoor installation is easy. Since air is exhausted by the heat recovery circulation air conditioner, the exhaust duct can be shorter than that of the central duct type air conditioner. The heat recovery circulation air conditioner can operate the air conditioner using the exhaust heat (return air heat), so it has a high heat exchange capacity, can reduce the size of the refrigerant circulation circuit, save energy, and maintain it compared to the total heat exchanger. Is easy. The external air conditioner can handle not only ventilation and outside air processing but also local exhaust, eliminating the need for dedicated equipment for local exhaust.
According to the second aspect of the present invention, the coefficient of performance is improved by increasing the air volume of the condenser to save energy, and the compressor can be used in a wide range of regions from extremely cold regions to extremely hot regions without increasing the size of the compressor.
According to the third aspect of the invention, only the refrigerant circulation circuit is taken out of the casing without removing the entire casing, so that the refrigerant recovery operation and maintenance can be easily performed, and the installation and storage are not troublesome. Further, by replacing only the refrigerant circuit, the cost can be reduced at the time of renewal.
According to the fourth aspect of the present invention, even when used at a high wind speed, the pressure loss does not increase and the heat exchange capacity does not decrease, so that a small-sized evaporator and condenser can be used, and the air conditioner and the air conditioner can be made much more compact. . At normal wind speeds, pressure loss is reduced and heat exchange efficiency is improved, so that a small blower can be used and noise can be reduced.
[Brief description of the drawings]
FIG. 1 is a front view showing one embodiment of the present invention.
FIG. 2 is a sectional view of a heat recovery circulation air conditioner.
FIG. 3 is a cross-sectional view of the external conditioner.
FIG. 4 is a front view showing another embodiment.
FIG. 5 is a sectional view of a fin tube.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing 2 Evaporator 3 Condenser 4 Compressor 5 Evaporator 6 Condenser 7 Compressor 8 Casing 14 Air supply air path 15 Exhaust air path 16 Evaporation air path 17 Condensed air path 19 Fin tube A Heat recovery circulation air conditioner B Outside Conditioner C Refrigerant circuit D Refrigerant circuit E Indoor air conditioning zone

Claims (4)

A heat pump type external conditioner B for supplying outside air to the indoor air conditioning zone E; and a heat pump for circulating the air in the indoor air conditioning zone E to supply air and exhausting a part of the air in the indoor air conditioning zone E to the outside. A heat recovery circulation air conditioner A of the type, and an evaporator 5, a condenser 6, a compressor 7, and an indoor air conditioning zone supply which constitute a refrigerant circulation circuit D for external control are provided in a casing 8 of the external control device B. The heat recovery circulation air conditioner A includes an evaporative air passage 16 provided with the external conditioning evaporator 5 through which the outside air for air passes and a condensation air passage 17 provided with the external conditioning condenser 6 through which the outside air for condensation passes. The air supply and ventilation provided with the evaporator 2, the condenser 3, the compressor 4, and the air conditioning evaporator 2 through which the circulating air in the indoor air conditioning zone E passes inside the casing 1 of the air conditioning refrigerant circulation circuit C. Road 14 and air for exhaust and heat recovery of indoor air conditioning zone E The heat pump air conditioning system characterized by comprising a, an exhaust air passage 15 provided with the air-conditioning condenser 3 through. The heat pump air conditioning system according to claim 1, wherein the external conditioner B includes an augmenting unit that controls a flow rate of the blower 10 in the condensation blower passage 17 according to a heat load. The air conditioning refrigerant circulation circuit C is configured to be able to be taken out and stored in the casing 1 of the heat recovery circulation air conditioner A, and the external conditioning refrigerant circulation circuit D is capable of being taken out and stored in the casing 8 of the external conditioning machine B. The heat pump air-conditioning system according to claim 1 or 2, wherein: The heat pump air conditioning system according to claim 1, wherein the evaporators (2, 5) and the fin tubes (19) of the condensers (3, 6) of the air conditioning refrigerant circulation circuit (C) and the external conditioning refrigerant circulation circuit (D) are elliptic tubes.

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