CN101196317B - Air conditioner - Google Patents

Abstract

The air conditioner of the present invention considers the installation space of air conditioners in residential houses in recent years, specifies the size of the indoor unit of the air conditioner, and achieves high efficiency within the limited range of size through the shape and structure of the indoor unit. Energy saving (APF benchmark). An air-conditioning device with a wall-mounted indoor unit, the indoor unit has a box body and a cross-flow fan, the box body has a suction port on the top or front or both, and an air outlet on the bottom; the cross-flow fan will The air sucked into the box by the suction inlet is blown to the outlet through the indoor heat exchanger; and the maximum width of the indoor unit is less than 800 mm, and the maximum height is less than 295 mm, and, The diameter of the cross-flow fan is not less than 100 mm and not more than 115 mm, and the number of stages of the indoor heat exchanger is not less than 16 stages.

Description

air conditioner

technical field

The present invention relates to an air conditioning device, in particular to an indoor unit.

Background technique

A conventional air conditioner has a structure in which the height of the indoor unit is 360 mm, the depth is 150 mm, the diameter of the cross-flow fan is 86 mm, and the number of stages of the indoor heat exchanger is 14 (for example, refer to Patent Document 1).

Patent Document 1: Japanese Patent Application Publication No. 7-30926 (item 2, FIG. 1 )

At present, the energy saving of the air conditioner, which consumes the most electricity in the home, has become a mission of the whole society to suppress global warming. In particular, among the air-conditioning devices, split-type air-conditioning devices constitute the highest proportion of all air-conditioning devices. Compared with other types of classification, the specified value of the energy-saving law sets a high energy-saving specified value. In the type air-conditioning apparatus, the indoor unit is hung on an indoor wall, installed, and connected to a refrigerant pipe for an outdoor unit having a compressor, an outdoor side heat exchanger, or the like, and used.

Therefore, in order to improve the efficiency of air-conditioning capacity, heat exchangers and the like have been increased in size and capacity along with the promotion of energy saving. Therefore, the external dimensions of air-conditioning apparatuses have increased in size and weight. In particular, the method of connecting one wall-mounted indoor unit and one outdoor unit with refrigerant pipes is the main method of household air-conditioning equipment, and there is a tendency in air-conditioning equipment that the more regulated by the Energy Conservation Law The larger the equipment with high value and high energy-saving performance, the outer dimensions of the outdoor unit and the horizontal and vertical widths of the indoor unit have increased.

There is a background that both indoor and outdoor units have become larger. That is, the current energy-saving regulations (2004 benchmark and 2007 benchmark) are the average COP (cooling and warming average) under the rated operating conditions of cooling and heating. COP). In this cold/warm average COP, since both the indoor unit and the outdoor unit have the same energy-saving effect, the indoor unit and the outdoor unit are both enlarged. However, since 2010, the energy-saving regulations have been changed to evaluate the annual energy consumption efficiency (APF) that is more suitable for the actual environment. Therefore, it is necessary to reconsider the form of indoor and outdoor units that are suitable for the improvement of APF.

On the other hand, the residential environment has become diversified in recent years. For example, 3.5-inch pillars are often used in Japanese-style rooms between three feet (three feet), and the width of the wall space where the indoor unit of the air conditioner can be installed About 800mm. And, for example, in the living room, windows are increasing in size due to the need for interior decoration, and the vertical width of the space where the indoor unit of the air conditioner is installed on the window is about 295 mm. There is a tendency that the space for installing the indoor unit of the air conditioner is reduced. Furthermore, the living room is integrated with the dining room or the kitchen, and the wall surface of the room is reduced to make a larger room, and the installation positions of the wall-mounted air conditioners are also reduced.

As described above, the demand for larger capacity (higher capacity) of air-conditioning equipment has increased due to the increase in room size, and the above-mentioned energy-saving and high-efficiency improvements have also increased the size of the equipment. Another On the one hand, from the perspective of the above-mentioned residential environment, due to the limitation of the horizontal width, vertical width or both of the device size, the problem that the indoor unit of the air conditioning device cannot be installed has also increased.

Contents of the invention

The present invention is proposed to solve the above-mentioned problems. On the basis of considering the installation space of air-conditioning devices in houses in recent years, the size of the indoor unit of the air-conditioning device is specified. Realize high energy saving within the limited range (APF standard), and at the same time, reduce the environmental burden by reducing the use of raw materials and promoting resource recycling.

The present invention is an air conditioner, which is composed of a compressor driven by an inverter that can control the rotation speed, a four-way valve, an indoor side heat exchanger, a decompression device, and an outdoor side heat exchanger. The four-way valve is a wall-mounted indoor unit that can perform refrigeration cycle and heating cycle operation. The indoor unit has a box and a cross-flow fan (cross-flow fan). The box has a suction port on the top or front or both. There is an air outlet at the bottom; the cross-flow fan blows the indoor air sucked into the box from the suction inlet to the air outlet through the indoor heat exchanger; and the indoor unit has a maximum lateral width of 800mm A shape of less than or equal to 295 mm in maximum height, the diameter of the cross-flow fan is not less than 100 mm and not more than 115 mm, and the number of stages of the indoor heat exchanger is not less than 16.

The air conditioner of the present invention is constructed by connecting a compressor driven by an inverter whose rotation speed can be controlled, a four-way valve, an indoor side heat exchanger, a decompression device, and an outdoor side heat exchanger, and has the function of switching the four-way The valve is in the form of a wall-mounted indoor unit that can perform refrigeration cycle and heating cycle operation. The indoor unit has a box body and a cross-flow fan. The box body has a suction port on the top or front or top and front, and an air outlet on the bottom; The cross-flow fan blows the indoor air sucked into the box from the suction inlet to the air outlet through the indoor heat exchanger; and the indoor unit has a maximum width of 800 mm or less and a maximum height of It has a shape of 295 mm or less, the diameter of the cross-flow fan is 100 mm to 115 mm, and the number of stages of the indoor heat exchanger is 16 or more, so it has the following effects, that is, when considering the installation of the air conditioner High energy efficiency can be achieved within the size range of the indoor unit in the space, and at the same time, the environmental burden can be reduced by reducing the amount of raw materials used.

Description of drawings

Fig. 1 is a refrigerant circuit diagram of an air-conditioning apparatus according to a first embodiment of the present invention.

Fig. 2 is a cross-sectional view of the indoor unit of the air-conditioning apparatus according to the first embodiment of the present invention.

Fig. 3 is a front view of an indoor unit of the air-conditioning apparatus according to the first embodiment of the present invention.

4 shows the number of stages of indoor heat exchangers and the total amount of raw materials used in the indoor heat exchangers and outdoor heat exchangers in the realization rate of the same energy saving law standard value of the air-conditioning apparatus according to the first embodiment of the present invention. chart.

Fig. 5 is a graph of the fan diameter and the air volume at the same noise level in the air-conditioning apparatus according to the first embodiment of the present invention.

Fig. 6 is a cross-sectional view of an indoor unit of another air-conditioning apparatus according to the first embodiment of the present invention.

Fig. 7 is a right side view of the indoor unit of the air-conditioning apparatus according to the first embodiment of the present invention.

Detailed ways

first embodiment

A first embodiment of the present invention will be described below using FIGS. 1 to 7 . Fig. 1 is the refrigerant circuit diagram of the air-conditioning device of the present invention, in the figure, connect compressor 1, four-way valve 2, outdoor side heat exchanger 3, expansion mechanism (electronic control type expansion valve) 4, indoor side Heat exchanger 5 constitutes a refrigerating cycle, outdoor blower (propeller blower) 6 is installed on the air path where outdoor heat exchanger 3 is arranged, and indoor blower (cross flow fan) 7 is installed on indoor heat exchanger 5 .

During the cooling operation, the compressed high-temperature and high-pressure refrigerant is discharged from the compressor 1 and flows into the outdoor heat exchanger 3 through the four-way valve 2 . In this outdoor heat exchanger 3, the outdoor air passes between the fins and the tubes (heat transfer pipes) of the outdoor heat exchanger while exchanging heat through the outdoor air blower 6 installed on the air path, thereby The refrigerant is cooled to a high-pressure liquid state, and the outdoor heat exchanger 3 functions as a condenser. Thereafter, the pressure-reduced two-phase refrigerant passes through the expansion mechanism 4 to become a low pressure, and flows into the indoor heat exchanger 5 . In the indoor side heat exchanger 5, driven by the indoor side blower 7 installed in the air passage, the indoor air passes between the fins and the tubes (heat transfer tubes) of the indoor side heat exchanger 5 to exchange heat with the refrigerant. By exchanging, the air blown into the indoor space is cooled, while the refrigerant receives heat from the air, evaporates, and turns into a gaseous state (the indoor heat exchanger 5 functions as an evaporator). After that, the refrigerant returns to the compressor 1 to circulate, thereby conditioning the air in the indoor space. In addition, in the case of heating operation, by reversing the four-way valve 2, the refrigerant flow in the opposite direction to the above direction is formed in the refrigeration cycle, the indoor heat exchanger 5 acts as a condenser, and the outdoor heat exchanger 3 acts as an evaporator. The heater works, which heats the air in the room.

Fig. 2 is a cross-sectional view of an indoor unit of the air-conditioning apparatus according to the first embodiment of the present invention, and Fig. 3 is a front view of the air-conditioning apparatus according to the first embodiment of the present invention. In FIG. 2, 5 is an indoor side heat exchanger housed inside the indoor unit for cooling or heating the air sucked in from the suction port 17. The exchanger constitutes a part of a refrigeration cycle formed by a compressor, an expansion valve, and the like, and the refrigerant circulating in the refrigeration cycle flows through the inside of the heat transfer tube, and exchanges heat with air for cooling and heating. 7 is a cross-flow fan for blowing air from the air inlet 17 through the air passage 16 to the air outlet 18; 11 is an up and down wind direction vane for controlling the wind direction of the air blown out from the air outlet 18; 13 is to collect the air sucked from the air inlet 17 14 is a filter cleaning mechanism for removing dust adhering to the filter 13, and 15 is used to recover condensation generated on the heat exchanger 5 during cooling or dehumidification operation. Form the drain pan (Drempan) formed by the nozzle 20 on the upper wall of the air passage near the air outlet, 16 is the air passage leading from the air inlet 17 to the air outlet 18, and 18 is to pass the air sucked in from the air inlet 17 by the cross-flow fan 7 through the wind. Channel 16 is a blower outlet for indoor discharge, 12 is a display unit showing the operating state of the indoor unit, and 19 is a signal receiving unit for receiving remote control signals for remote operation.

In addition, since the central vertical interval (stage pitch) of the heat transfer tubes constituting the heat exchanger 5 is 15 to 22 mm, and the height dimension H of the indoor unit is within 295 mm, the heat exchanger 5 is structured such that the front side The heat exchanger 5a is divided into two parts in the shape of a "k" at about the center or is integrally formed. At the same time, the number of longitudinally loaded heat transfer tubes (number of stages) of the front side heat exchanger 5a is about 12, and the back side heat exchanger 5a The number of vertically loaded heat pipes of 5b can be loaded with about 6 levels. That is, the heat exchangers on the indoor unit side have a total capacity of 16 stages or more. Furthermore, on the upstream side of the airflow of the heat exchanger 5, the auxiliary heat exchanger 5c which consists of one row is provided. They are respectively provided on the air upstream side of the lower side of the back side heat exchanger 5b and the front side heat exchanger 5a.

In addition, the rotation center of the cross-flow fan 7 is located below the center of the height H of the indoor unit, and is located on the upper side of 1/3 from the lower end, thereby forming a space on the upper side inside the indoor unit, and the rear heat exchanger 5b can be mounted. . Moreover, by setting the position of the rotation center of the cross-flow fan 7 and the shape of the heat exchanger 5, the fan diameter of the cross-flow fan 7 can be more than 100mm, and low noise and high efficiency can be realized.

In Fig. 2, the suction port 17 for sucking indoor air into the machine is arranged on the upper part of the indoor unit opposite to the upper side of the front side heat exchanger 5a and the back side heat exchanger 5b, and the grille 9 through which the indoor air passes cover. Since the suction port 17 occupies almost the entire upper part of the indoor unit and has a sufficient suction area, it has a structure that does not have a suction port for indoor air on the appearance surface of the front side of the indoor unit.

And, the filter 13 is arranged in the air path between the panel 9 provided with the suction port 17 and the heat exchanger 5, and has the function of collecting the dust which flows in from the suction port 17 together with the air before entering the heat exchanger 5. Function. The filter cleaning mechanism part 14 is composed of a moving device that moves the filter 13, a pressurizing part 14c that presses the filter 13 against the brush 14a, a brush 14a that collects dust adhering to the filter 13, and stores the recovered dust. The dust box 14b constitutes. Since the air conditioner regularly removes the dust adhering to the filter 13, the heat exchanger 5 or the cross-flow fan 7 etc. installed inside the air path of the indoor unit can be kept clean, and dust can be prevented from accumulating on the filter. Therefore, the reduction in air volume can be suppressed and the initial efficiency can be maintained. In addition, since the dust collecting box 14b is treated with antibacterial and antifungal treatment, bacteria or mold can be prevented from multiplying in the recovered dust.

In addition, the filter cleaning mechanism part 14 is arranged obliquely above the front side heat exchanger 5a in the shape of a く shape with a predetermined distance, and has a gap with the front side heat exchanger 5a. The air flows from the filter cleaning mechanism part 14 to the lower part of the front side heat exchanger 5a without being hindered, so that high-efficiency heat exchange can be performed, and high energy saving can be obtained.

And, because form following structure, promptly, between the upper end portion of front side heat exchanger 5a, the upper end portion of rear side heat exchanger 5b and suction port 17, part or all of filter cleaning mechanism part 14 is not provided, therefore, The filter cleaning mechanism part 14 has no influence on the height dimension H of the indoor unit, and the heat exchanger 5 can be efficiently installed inside the indoor unit 1 whose height is limited, and high energy saving performance can be exhibited.

In addition, the filter cleaning mechanism part 14 is arranged in front of the front side heat exchanger 5a, and part or all of the filter cleaning mechanism part 14 is not provided between one lateral end of the heat exchanger 5 and the side surface of the indoor unit. The cleaning mechanism part 14 does not increase the width dimension L of the indoor unit, that is, the effect of becoming wider, and the heat exchanger 5 can be efficiently installed inside the indoor unit whose width is limited, and high energy saving can be exerted. sex.

Moreover, even if the filter cleaning mechanism part 14 is not installed, the interior of the indoor unit 1 can be kept clean by the user regularly cleaning the filter 13, and since dust is prevented from accumulating on the filter, the initial efficiency can be maintained. . In addition, by installing a dust collector for recovering fine dust contained in the air in the room, and a deodorizer for removing or decomposing unpleasant components in the air in the room, the indoor space can be made more comfortable.

And, as shown in Figure 3, on the front side of the indoor unit, the grille 10 is arranged at a position opposite to the front side heat exchanger 5a, and can be opened and closed or freely disassembled, and the grille 10 is not provided with a suction port on the front side. , Therefore, high decorativeness can be obtained. Since the suction ports 17 are concentrated on the upper part of the indoor unit, the filter 13 can be made compact and inexpensive. Moreover, since the maximum height of the indoor unit in Figure 2 is 295mm, and the maximum width of the indoor unit in Figure 3 is 800mm, it is not restricted by the residential environment for installation, and it also has the ability to expand the indoor wall. The effect of the area, the limitation refers to the limitation of the installation space in the width dimension by using 3.5-inch columns between the three feet of the Japanese-style room, or the limitation of the installation space in the height dimension due to the enlargement of the windows.

Fig. 4 is a graph showing the relationship between the number of stages of indoor heat exchangers and the total amount of raw materials (the sum of copper and aluminum) used in the indoor heat exchangers and outdoor heat exchangers in the same energy-saving law standard value realization rate, and the vertical axis is The amount of raw materials used [kg], the horizontal axis is the number of heat exchanger stages on the indoor side. Also, assuming that the device size (horizontal width) of the indoor unit is constant, the increase or decrease in the capacity of the heat exchanger due to the change in the number of stages of the indoor heat exchanger is calculated. In the case of the 2004 and 2007 Energy Conservation Act standards (the average value of the rated COP for cooling and heating), even if the number of indoor heat exchangers is reduced, if the outdoor heat exchange is enlarged and the indoor heat exchangers are reduced The same energy saving performance can be obtained even if the amount of heat exchanger is equal to the same amount. Therefore, as shown by the solid line in Fig. 4, even if the number of stages of the indoor heat exchanger is changed, the amount of raw materials used is almost the same. On the other hand, in the case of the 2010 Energy Conservation Act standard (APF: Annual Energy Consumption Efficiency), since the efficiency improvement of the indoor heat exchanger greatly contributes to the efficiency improvement of the APF, once the indoor heat The number of stages of the exchanger must be larger than the reduction of the indoor heat exchanger. As shown by the dotted line in Figure 4, increasing the number of stages of the indoor heat exchanger reduces the amount of raw materials used.

In addition, in an air-conditioning apparatus using a refrigerating cycle, in order to improve cooling performance, the amount of raw materials used when increasing the size of the outdoor unit is smaller than when increasing the size of the indoor unit. On the other hand, in order to improve the heating performance, the amount of raw materials used when increasing the size of the indoor unit is less than that of increasing the size of the outdoor unit. In an air conditioner with such characteristics, in the case of the 2004 and 2007 Energy Conservation Act standards, the cooling and heating average COP cooling:heating improvement contribution ratio is 1:1, but in the 2010 Energy Conservation Act In the case of the benchmark, the relationship between cooling and heating of APF improvement contribution rate is 1:3. Therefore, in the case of the APF standard, since the improvement of heating is effective, the usage-amount of the raw material at the time of enlarging an indoor unit is small. Also, if either or both of the fins and the heat pipes of the heat exchanger are made of aluminum or an aluminum alloy, the amount of raw materials used can be further reduced.

FIG. 5 shows the diameter of the fan and the air volume at the same noise when the number of stages of the indoor heat exchanger is 16. FIG. The vertical axis is the blowing air volume [m ³ /min], and the horizontal axis is the diameter of the cross-flow fan [mm], which are indicated by solid lines. The larger the fan diameter, the more blade size and number of blades can be increased. Therefore, the air volume can also be increased. The increase of air volume is related to the improvement of heat exchange capacity. Therefore, it can be seen that the larger the fan diameter is, the more APF can be improved. Here, the larger the fan diameter, the more the blowing air volume can be increased, which leads to the improvement of APF. However, if there is a restriction on the height H of the indoor unit of 295 mm, when the fan diameter is 115 mm or more, the distance between the heat exchanger and the cross-flow fan will be reduced. The minimum gap distance between them will be reduced, and abnormal sound (rotating sound) will be generated, so 110mm to 115mm is the most appropriate size.

Existing air conditioners with a maximum width of 800 mm or less and a maximum height of 295 mm or less, based on an air conditioner larger than the above-mentioned indoor unit, the cross-sectional shape is similarly reduced so that the width is 800 mm or less, The height dimension is 295mm or less, the diameter of the cross-flow fan is 99mm or less, and the number of stages of the indoor heat exchanger is 15 or less. This structure realizes miniaturization and lowers the energy saving performance of the indoor unit (cold and warm average COP Standard) Compensate on the outdoor unit side and use a method that does not increase the amount of raw materials used. However, in order to change to the APF standard under the Energy Conservation Act after 2010, the diameter of the cross-flow fan is 100 mm by forming the indoor unit with a maximum width of 800 mm or less and a maximum height of the indoor unit of 295 mm or less. The structure above, and the number of stages of the above-mentioned indoor heat exchanger being 16 or more stages can not only achieve high efficiency, but also reduce the amount of raw materials used, and contribute to reducing the environmental burden.

Fig. 6 is a cross-sectional view of an indoor unit of another air-conditioning apparatus according to the first embodiment of the present invention. The indoor side heat exchanger 5 is an integrated heat exchanger whose shape can be freely set according to the shape of the indoor air passage. Continuous surface, therefore, heat exchangers can be installed at a higher density, with the effect of high performance and miniaturization. In addition, no unnecessary materials are used for the indoor air duct, which can further reduce the environmental burden.

Moreover, FIG. 7 is a right side view of the air-conditioning apparatus of 1st Embodiment of this invention. In recent years, due to the increase in the amount of recycling plastics and the improvement in the technology of removing impurities from recycled plastics, it can be applied not only to cross-flow fans that cannot be directly seen by users, but also to exterior parts. For example, as shown in Figure 7, the main body 8, the outer contour side or the panel 9 with the suction port, etc. are installed and fixed, and become the front side appearance surface and can be switched or freely disassembled. The use of recycled plastics for the grille 10, exterior parts forming the outer contours of the vertical blades (not shown), and the cross-flow fan can further reduce the environmental burden.

In addition, in Fig. 2 and Fig. 3, the structure in which the suction port 17 is only arranged on the upper side of the indoor unit has been described, but it is not limited to this, and it may also be arranged only on the front side of the indoor unit, or on the upper side. As well as before, the same effect can be obtained.

Claims (3)

1. conditioner, connection can control rotary speed by converter compressor driven, cross valve, indoor side heat exchanger, decompressor, outdoor heat exchanger and constitute, have by switching described cross valve and can carry out wall-hanging indoor set kind of refrigeration cycle and heating cycle operation, that utilize refrigerant piping to be connected in the family to use and the form of an off-premises station, it is characterized in that, described indoor set has casing and cross flow fan, described casing in the above or front or top and front have suction inlet, have a blow-off outlet below; Described cross flow fan will be blown to described blow-off outlet by described indoor heat converter from the room air that described suction inlet is drawn in this casing; And this indoor set has below the maximum horizontal wide 800mm of being of a size of and maximum height is of a size of the following shape of 295mm, the diameter of described cross flow fan is below the above 115mm of 100mm, and uprise in order to make the heating running compare the energy-conservation efficient of improving with cooling operation, add up to use amount so that the mode that the material of described indoor side heat exchanger and outdoor heat exchanger adds up to use amount to be no more than 8.8Kg suppresses this material, and the progression of described indoor side heat exchanger is more than 16 grades.

2. conditioner as claimed in claim 1 is characterized in that, with the described indoor side heat exchanger type heat exchanger that forms as one, the front and back of the air inflow direction of this one-piece type heat exchanger forms continuous face respectively.

3. conditioner as claimed in claim 1 is characterized in that, constituting the heat pipe of described indoor side heat exchanger and the either or both of the heat pipe that constitutes outdoor heat exchanger is aluminum or aluminum alloy.

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