JP3565276B2 - Heat pump type air conditioner - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat pump type air conditioner.
[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 type air conditioner which solves these problems.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, a heat pump air conditioner according to the present invention has a casing in which an evaporator, a condenser and a compressor constituting a refrigerant circulation circuit and the evaporator through which return air and outside air pass are provided. An air blower path, an exhaust blower path provided with the condenser through which return air and outside air pass, and a condensing blower capable of controlling a flow rate in the exhaust blower path, and the condensing blower according to a heat load. A control means for controlling the air volume is provided. Further, an evaporative blower capable of controlling the air flow is provided in the air supply air passage, and the control means performs air flow control of the condensing air blower and the evaporative air blower according to the heat load. Further, a compressor whose capacity is freely controllable is used as a control means for controlling the air volume of the condensing fan and the evaporating fan and controlling the capacity of the compressor according to the heat load. Further, a return air ventilation path is provided in the casing, and an external air intake communicating with the air supply air path and the exhaust air path is formed in the casing, and the exhaust air path, the air supply air path, and the return air ventilation path are formed. The casing was formed by adjoining the passages in three rows and connecting and connecting the air supply passage and the return air passage at one end in the column direction and connecting and connecting the exhaust air passage and the return air passage. . Further, a duct chamber communicating with the air supply air passage or with the air supply air passage and the return air air passage is provided, and the air cleaning mechanism is housed in this chamber so that it can be stored and taken out. Further, the refrigerant circulation circuit is configured to be able to be taken out and stored in the casing. Further, the fin tubes of the evaporator and the condenser were constituted by elliptic tubes.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 4 show an embodiment of a heat pump type air conditioner according to the present invention. The air conditioner includes an evaporator 2, a condenser 3 and a compressor which constitute a refrigerant circuit C in a casing 1. 4, an air supply path A provided with an evaporator 2 through which return air and external air pass, an exhaust path B with a condenser 3 through which return air and external air pass, and a return air path E. I have. The casing 1 is provided with an outside air intake 7, an air supply port 8, a return air port 9, and an exhaust port 10, and the outside air intake 7 and the air supply port 8 are connected to each other through an air supply / air supply path A, so that the outside air intake The inlet 7 and the exhaust port 10 are connected to each other through an exhaust air path B, and the return air port 9 is connected to the return air path E. In addition, the wind direction (blowing direction) is indicated by solid and dotted outline arrows.
[0006]
The exhaust air path B, the supply air path A, and the return air path E are arranged adjacent to each other in three rows, and the air supply path A and the return air path E are connected at one end in the column direction. The casing 1 is formed in a flat shape by connecting the return air blowing passage E in communication. The outside air inlet 7, a communication part between the supply air supply path A upstream of the outside air intake 7 and the return air supply path E, and a connection between the exhaust air supply path B upstream of the outside air intake 7 and the return air supply path E Each section is provided with an air volume adjustment damper.
[0007]
Further, a duct chamber 5 communicating with the supply air passage A and the return air passage E is provided, and the air cleaning mechanism 6 is housed in the chamber 5 so as to be able to be stored and taken out. The air cleaning mechanism 6 may be constituted by a photocatalyst filter for removing dust, deodorizing and sterilizing pollen and tobacco, for example, but may be constituted by other electric devices. The chamber 5, the air supply passage A, the return air passage E, and the indoor are connected to each other through a duct or the like, but the chamber 5, the air supply passage A, and the return air passage E may be directly connected to each other. . In the example shown in the figure, the chamber 5 is divided into two parts, and the air purifying mechanism 6 is provided in the divided vacant room communicating with the air supply air passage A. The air purifying mechanism 6 may be provided internally. In this case, the return air ventilation passage E and the indoor space are connected by a duct or the like.
[0008]
The refrigerant circuit C is formed by connecting the evaporator 2, the condenser 3, the compressor 4, a liquid receiver (not shown), an expansion valve, a refrigerant circulation direction switching valve, and the like with piping. Heat absorption and heat radiation can be switched freely. The condenser 3 and the evaporator 2 are provided adjacent to each other to minimize the volume occupied in the refrigerant circuit C. The fin tubes of the condenser 3 and the evaporator 2 are preferably constituted by low pressure drop elliptical tubes (see FIG. 5), but may be circular tubes.
[0009]
The refrigerant circuit C is configured to be able to be taken out and stored in the casing 1. For example, the refrigerant circulation circuit C is fixed to and integrated with a frame 13 which is detachably mounted in the casing 1, an opening is formed on one surface of the casing 1, and a frame 13 with a refrigerant circulation circuit is formed on the opening. It is constructed so that it can be taken out and stored freely. The opening is provided with a detachable or openable / closable exterior plate. It is to be noted that the refrigerant circulation circuit C may be provided so as to be freely taken out and stored in a configuration other than the above.
[0010]
An exhaust blower B is provided with a condensing blower 12 whose air volume can be controlled, and an air blower A is provided with an evaporative blower 11 whose air flow can be controlled. The blowers 11 and 12 are configured to be capable of controlling the air volume (blade rotation speed) by inverter control or the like. The compressor 4 is configured to be capable of controlling the capacity by inverter control or the like. D is a control means for controlling the air volume of the condensing fan 12 and the evaporating fan 11 and the capacity control of the compressor 4 in a stepwise or proportional manner 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. The control means D is composed of, for example, a sensor or a microcomputer.
[0011]
In this heat pump type air conditioner, heat is exchanged between the return air (exhaust air from the inside) taken in from the return air port 9 and the outside air taken in from the outside air inlet 7 with the refrigerant flowing through the evaporator 2 and, if necessary, the humidifier 14. Is operated to supply air from the air supply port 8, and at the same time, exchange heat between the return air taken in from the return air port 9 and the outside air taken in from the outside air inlet 7 to absorb or radiate heat, thereby exchanging heat. Exhaust from 10 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. At this time, the amount of heat (cooling / heating capacity) exceeding the performance limit of the compressor 4 can be obtained by increasing the flow rate of the condenser, and the coefficient of performance (COP) is improved. 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.
[0012]
It should be noted that the capacity can be freely adjusted as the control means D which performs only the air volume control of the condensing blower 12 and the evaporative air blower 11 in accordance with the heat load, or as the control means D which performs only the air volume control of the condensing blower 12. . The outside air intake 7 may be provided so as to extend over the air supply passage A and the exhaust air passage B, instead of being separately connected to the supply air passage A and the exhaust air passage B one by one. The arrangement order of the exhaust air passage B, the supply air passage A, and the return air passage E can be freely changed, and the blowers 11, 12 can be of a push-in type instead of a suction type.
[0013]
【The invention's effect】
According to the first aspect of the present invention, a single air conditioner can perform an outside air process such as a cooling / heating operation and ventilation, and piping work is not required. Since the condenser can be operated by using the return air heat, the heat exchange capacity is high and the refrigerant circulation circuit can be downsized to save energy, eliminating the need for extra external air treatment equipment such as a total heat exchanger, and It can be made compact, requires less installation space, and can reduce equipment costs and running costs. The capacity of the air conditioner can be finely adjusted, the coefficient of performance is improved and energy saving is achieved, and the compressor can be used in a wide range of regions from extremely cold to extremely hot regions without increasing the size of the compressor . By adding the capacity control of compressors, it is possible to perform a more detailed capability adjustment. The casing flat the exhaust air passage and the supply air passage and the return air blowing path in the three rows, it is possible to provide the air supply port and the return air inlet in communication with an indoor to the column direction other end portion, An air conditioner can be easily installed along a wall or the like with a small floor area.
According to the second aspect of the present invention, a high degree of outside air processing can be performed, so that it can be used in hospitals and clean rooms. The chamber can be used also as the casing of the air cleaning mechanism, so that maintenance and installation of the air cleaning mechanism is easy, and the air conditioner can be made compact.
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 can be made much more compact.
[Brief description of the drawings]
FIG. 1 is a front view showing one embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is an explanatory diagram of a use state.
FIG. 4 is a simplified explanatory diagram of a refrigerant circuit.
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 Chamber 6 Air purifying mechanism 7 Outside air inlet 6 Air purifying mechanism 11 Evaporating blower 12 Condensing blower A Supply air path B Exhaust air path C Refrigerant circulation circuit D Control means E Return air duct

Claims (4)

In a casing 1, an evaporator 2, a condenser 3, and a compressor 4 whose volume can be controlled , which constitutes a refrigerant circuit C, a supply air passage A provided with the evaporator 2 through which return air and outside air pass, An exhaust ventilation path B provided with the condenser 3 through which air and outside air pass, and a return air ventilation path E. The exhaust ventilation path B is provided with a condensing blower 12 capable of controlling the air flow, and An air blower 11 capable of controlling the air flow is provided in the path A, and control means D for controlling the air flow of the condensing air blower 12 and the air blower 11 and controlling the capacity of the compressor 4 in accordance with a heat load, An external air inlet 7 communicating with the air supply air passage A and the exhaust air passage B is formed in the casing 1, and the exhaust air passage B, the air supply air passage A, and the return air air passage E are connected to each other by three. Adjacent to a row, and at one end in the row direction, the air supply air passage A and the return Heat pump air conditioner which is characterized in that the formation of the casing 1 into a flat shape to the airflow path E is communicatively connected and said exhaust air passage B the return air blowing path E by communicatively connected. A duct chamber 5 communicating with the air supply air passage A or communicating with the air supply air passage A and the return air air passage E, and an air purification mechanism 6 is housed in the chamber 5 so as to be housed and taken out. Item 2. A heat pump air conditioner according to item 1 . The heat pump type air conditioner according to claim 1 or 2, wherein the refrigerant circulation circuit (C) is configured to be able to be taken out and stored in the casing (1) . 4. The heat pump air conditioner according to claim 1, wherein the fin tubes of the evaporator 2 and the condenser 3 are elliptical tubes .

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