JP2010032146A - Local air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a local air conditioner capable of improving comfort of persons staying in a room and contributing to energy-saving. <P>SOLUTION: This local air conditioner includes a supply section, a supply temperature detecting section 48, an air-conditioning section 11 and a control section 9. The supply temperature detecting section 48 detects a temperature of the air supplied from the supply section. The air-conditioning section 11 includes an invertor compressor, and adjusts a temperature of the supply air. The control section 9 controls the invertor compressor. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a local air conditioner.

2. Description of the Related Art Conventionally, a local air conditioner that changes the amount of air blown by measuring the distance between a local air conditioner and an air-conditioning object / person has been proposed (see Patent Document 1).
JP-A-4-306443

  However, in Patent Document 1, although comfort is enhanced for the purpose of correcting an air conditioning problem for an object / person located far from the local air conditioner, a distance detecting means or the like is required.

  Accordingly, an object of the present invention is to provide a local air conditioner that improves the comfort of a person or the like located indoors and contributes to energy saving.

  The local air conditioner according to the first aspect of the present invention includes a blowing unit, a blowing temperature detecting unit, an air conditioning unit, and a control unit. A blowing temperature detection part detects the temperature of the blowing air blown from a blowing part. The air conditioning unit includes an inverter compressor and adjusts the temperature of the blown air. The control unit controls the inverter compressor.

  In the local air conditioner according to the first aspect of the invention, the capacity of the inverter compressor is controlled based on the blowing temperature, so that the compressor can be operated in accordance with the cooling amount required in the room.

  As a result, the comfort of a person or the like located in the room is improved and further contributes to energy saving.

  The local air conditioner according to the second aspect of the present invention is the local air conditioner according to the first aspect of the present invention, and the control unit performs the first control for keeping the blowing temperature value constant.

  In the local air conditioner according to the second aspect of the present invention, it is possible to adjust the temperature independent of the ambient temperature by keeping the blowing temperature value constant.

  A local air conditioner according to a third aspect of the present invention is the local air conditioner according to the first or second aspect of the present invention, and further includes a suction part and a suction temperature detection part. The suction temperature detection unit detects the temperature of the suction air sucked into the suction unit. The control unit performs a second control that keeps the difference between the suction temperature value detected by the suction temperature detection unit and the blowing temperature value constant.

  In the local air conditioner according to the third aspect of the invention, useless energy can be saved by making the temperature difference constant.

  A local air conditioner according to a fourth aspect of the present invention is the local air conditioner according to the third aspect of the present invention, further comprising a suction humidity detector. The suction humidity detection unit detects the amount of moisture contained in the suction air. The control unit performs third control for suppressing a decrease in the blowing temperature value when the suction humidity value detected by the suction humidity detection unit is low.

  In the local air conditioner according to the fourth aspect of the present invention, by providing the suction humidity detection unit, it is possible to adjust the blowing temperature in consideration of the humidity. For example, when the indoor humidity is low and dry, the sensible temperature is low, so the blowing temperature value does not have to be low.

  In the local air conditioner according to the first aspect of the invention, the capacity of the inverter compressor is controlled based on the blowing temperature, so that the compressor can be operated in accordance with the cooling amount required in the room.

  As a result, the comfort of a person or the like located in the room is improved and further contributes to energy saving.

  In the local air conditioner according to the second aspect of the present invention, it is possible to adjust the temperature independent of the ambient temperature by keeping the blowing temperature value constant.

  In the local air conditioner according to the third aspect of the invention, useless energy can be saved by making the temperature difference constant.

  In the local air conditioner according to the fourth aspect of the present invention, by providing the suction humidity detection unit, it is possible to adjust the blowing temperature in consideration of the humidity. For example, when the indoor humidity is low and dry, the sensible temperature is low, so the blowing temperature value does not have to be low.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

<Overall configuration of local air conditioner 1>
The local air conditioner 1 is an air conditioner that performs cooling in a room such as a factory or a work place by directly performing a vapor compression refrigeration cycle operation, and directly applies air to an air-conditioning object / person. As shown in FIG. 1, the local air conditioner 1 includes an air conditioning unit 11, a main duct 5, and a branch duct 6. The air conditioning unit 11 includes an indoor unit 4, an outdoor unit 2, and a refrigerant communication pipe 10 that connects the indoor unit 4 and the indoor unit 2. As illustrated in FIGS. 1 and 5, the refrigerant communication pipe 10 includes a liquid side refrigerant communication pipe 7 and a gas side refrigerant communication pipe 8. The main duct 5 is connected to the indoor unit 4. The branch duct 6 is connected to the lower part of the main duct 5.

<Air conditioning unit 11>
By the method described below, the air conditioner 11 adjusts the temperature of the blown air or performs other operations.

<Indoor unit 4>
First, the indoor unit 4 will be described.

(1) Installation Environment of Indoor Unit 4 As shown in FIG. 1, the indoor unit 4 is installed on a ceiling R in a room such as a factory or a work place by hanging. The indoor unit 4 is connected to the outdoor unit 2 via the refrigerant communication pipe 10.

(2) Configuration of Indoor Unit 4 Here, the space S1 side shown in FIG. 2 will be described as the suction side, and the space S2 side will be described as the outlet side.

  As shown in FIG. 2, the indoor unit 4 includes a main body casing 40, a suction part 41, a blowing part 43, an evaporator 44, an evaporator fan 45, a partition plate 46, and a drain pan 50.

  The suction part 41 is an opening located in a suction side portion inside the main body casing 40. Indoor air A1 in the room flows into the indoor unit 4 through the suction portion 41.

  The blowing part 43 is an opening located in the blowing side part inside the main body casing 40. Air cooled by an evaporator 44 described later becomes blown air A <b> 2 blown out to the main duct 5 through the blowout portion 43.

  The evaporator 44 heat-exchanges and cools the suction air sucked from the suction part 41 by rotating an evaporator fan 45 described later.

  The evaporator fan 45 is rotationally driven by a fan motor to take in indoor air A1 from the suction portion 41 into the indoor unit 4 and generate blown air A2 blown out to the main duct 5 via the evaporator 44. To do. Finally, the blown air A2 is guided by the main duct 5 and the branch duct 6 in the direction of the blown air A3 blown into the room.

  The partition plate 46 partitions the evaporator fan 45 and the evaporator 44.

  The drain pan 50 collects drain water generated by the evaporator 44.

  The indoor unit 4 includes a suction temperature sensor 47 (see FIG. 3), a blowout temperature sensor 48 (see FIGS. 1 and 3), and a suction humidity sensor 49 (see FIG. 3).

  The suction temperature sensor 47 detects the temperature of the suction air sucked from the suction part 41. The blowing temperature sensor 48 is provided in the vicinity of the blowing part 43 (see FIG. 1), and detects the temperature of the blowing air A2 blown from the blowing part 43. The suction humidity sensor 49 detects the amount of moisture contained in the suction air sucked from the suction part 41.

<Outdoor unit 2>
(1) Installation environment of outdoor unit 2 The outdoor unit 2 is installed outside a factory, a work place, or the like, and is connected to the indoor unit 4 via the refrigerant communication pipe 10.

(2) Configuration of Outdoor Unit 2 As shown in FIG. 5, the outdoor unit 2 includes an inverter compressor 21, a condenser 23, an outdoor electric expansion valve 24, and an outdoor fan 27. These constitute the outdoor refrigerant flow path 2a.

  The inverter compressor 21 is operated by the rotational speed control by the inverter, and the capacity is variable. This capacity changes based on the blowing temperature value detected by the blowing temperature sensor 48.

  One end of the condenser 23 is connected to the inverter compressor 21, and the other end is connected to the outdoor electric expansion valve 24. The condenser 23 condenses the refrigerant.

  The outdoor electric expansion valve 24 adjusts or depressurizes the flow rate of the refrigerant flowing in the outdoor refrigerant flow path 2a.

  The outdoor fan 27 is a fan that is driven to rotate by a fan motor to suck outdoor air into the outdoor unit 2 and discharge the air after heat exchange to the outdoor. Heat exchange is performed between the refrigerant flowing through the condenser 23 and the outdoor air.

<Main duct 5 and branch duct 6>
Next, the main duct 5 and the branch duct 6 will be described with reference to FIGS.

  The main duct 5 and the branch duct 6 have a cylindrical bellows structure and can be bent freely. For this reason, the branch duct 6 can directly apply wind to a person or an object located in a factory or work place.

  In the present embodiment, there are five branch ducts 6, but the number may be less than that or more.

<Configuration of control unit 9>
Next, the configuration of the control unit 9 will be described.

  The control unit 9 is configured using a microcomputer having a CPU, a memory and the like.

  As shown in FIGS. 1 and 4, the box containing the control unit 9 is located in the outer portion of the indoor unit 4.

  As shown in FIG. 3, the control unit 9 is electrically connected to a suction temperature sensor 47, an outlet temperature sensor 48, a suction humidity sensor 49, and the like. The control unit 9 receives detection signals from the suction temperature sensor 47, the blowout temperature sensor 48, the suction humidity sensor 49, and the like, and controls the capacity of the inverter compressor 21 based on these detection signals, and the outdoor electric expansion valve. 24 and the evaporator fan 45 are controlled. The capacity control is performed based on the blowing temperature value detected by the blowing temperature sensor 48.

  Moreover, the control part 9 can perform 1st control or 2nd control.

  The control unit 9 controls the indoor unit 4 and the outdoor unit 2 based on the control method selected by the user among the two control methods.

  The first control keeps the blowing temperature value constant. 1st control is control which brings a blowing temperature value close to the preset temperature value which the user set.

  In the second control, the difference between the suction temperature value detected by the suction temperature sensor 47 and the blowing temperature value is kept constant.

  Furthermore, the control part 9 can perform the 3rd control which suppresses the fall of a blowing temperature value, when the suction humidity value detected by the suction humidity sensor 49 is low. For example, even if the set temperature set by the user is 20 ° C., if the humidity is 55% or less, the control unit 9 suppresses the blowing temperature value to 23 ° C. Here, even if the control part 9 is performing the 1st control or the 2nd control, both can also perform 3rd control.

<Characteristics of local air conditioner 1 according to this embodiment>
(1) Features of the local air conditioner 1 when the control unit 9 performs the first control In the local air conditioner 1 in the above embodiment, the control unit 9 is configured to maintain the blowing temperature value constant. Control.

  If the blowing temperature value is kept constant, for example, even if the ambient temperature is high, the blowing temperature is not raised accordingly, and the blowing temperature is not lowered even if the ambient temperature is low. Can be. As a result, when the temperature in the room is high, the blowout temperature value is increased, so that it is difficult to cool the room, or the blowout temperature value is lowered, so that the room is still cooled. Can be improved. When the user reduces the air volume because it is too cold, the blowout temperature is also reduced due to a decrease in the evaporator airflow. However, if the blowout temperature is constant, it is possible to prevent overcooling. Therefore, temperature adjustment that is not influenced by the ambient temperature is possible, and the comfort of a person or the like located in the room is improved. For example, when the blowout temperature value is set to 28 ° C., it contributes to energy saving.

(2) Characteristics of the local air conditioner 1 when the control unit 9 performs the second control In the local air conditioner 1 of the above embodiment, the suction unit 41 and the suction temperature sensor 47 are provided. Based on the suction temperature value detected by the suction temperature sensor 47, the control unit 9 performs the second control for keeping the difference between the suction temperature value and the blowout temperature value constant.

  For example, when the suction temperature value is 30 ° C. and the set blowing temperature value is 15 ° C., considerable energy is required to lower the temperature by 15 ° C. Therefore, for example, if the difference between the blowing temperature value and the suction temperature value is set to 5 ° C., it is not necessary to consume 10 ° C. energy, which contributes to energy saving. Moreover, if the difference between the set blowing temperature value and the suction temperature value is increased, the comfort of a person or the like located in the room is also improved.

(3) Characteristics of the local air conditioner 1 when the control unit 9 performs the third control In the local air conditioner 1 of the above embodiment, the suction humidity sensor 49 is provided. The control unit 9 performs the third control that suppresses the decrease in the blowing temperature value when the suction humidity value detected by the suction humidity sensor 49 is low.

  For example, when the suction humidity value is low, the room is dry, so that the temperature experienced by a person or the like in the room decreases. Therefore, sufficient cooling is performed without reducing the blowing temperature value to the set value. Thereby, it becomes possible to adjust the blowing temperature in consideration of the humidity and the sensible temperature.

  Therefore, the comfort of a person or the like located in the room is improved and further contributes to energy saving.

<Modification of local air conditioner 1>
As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.

  In the said embodiment, although it demonstrated that it was installed in the ceiling R of indoors, such as a factory or a work place, this invention is not restricted to this, The floor-standing type which puts an air conditioner on a floor The local air conditioner 1 may be used, or a wall-mounted local air conditioner that hangs the air conditioner on a wall may be used.

  In the case of the floor-standing type local air conditioner 1, the local air conditioner 1 is configured as shown in FIG. 6, and the indoor unit 4 and the outdoor unit 2 are integrally incorporated in the main body casing 40. In this case, in the local air conditioner having a small refrigerating capacity, a capillary tube can be used instead of the outdoor electric expansion valve 24 of the above embodiment.

  INDUSTRIAL APPLICABILITY The present invention is useful because it improves the comfort of a person or the like located indoors and contributes to energy saving.

The schematic block diagram of a local air conditioner. The block diagram of an indoor unit and a duct. The control block diagram of a control part. The perspective view of an indoor unit and a duct. The refrigerant circuit diagram of a local air conditioner. Sectional drawing of the local air conditioner which concerns on a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Local air conditioner 2 Outdoor unit 4 Indoor unit 9 Control part 11 Air conditioning part 21 Inverter compressor 41 Suction part 43 Outlet part 47 Suction temperature sensor (suction temperature detection part)
48 Blowout temperature sensor (Blowout temperature detector)
49 Suction humidity sensor (Suction humidity detector)

Claims (4)

The blowout part (43),
A blowing temperature detecting section (48) for detecting the temperature of the blowing air blown from the blowing section (43);
An air conditioner (11) that includes an inverter compressor (21) and adjusts the temperature of the blown air;
A control unit (9) for controlling the inverter compressor (21);
With
The control unit (9) performs capacity control of the inverter compressor (21) based on the blowing temperature value detected by the blowing temperature detection unit (48).
Local air conditioner (1). The control unit (9) performs a first control for keeping the blowing temperature value constant.
The local air conditioner (1) according to claim 1. A suction part (41);
A suction temperature detection part (47) for detecting the temperature of the suction air sucked into the suction part (41);
Further comprising
The control unit (9) performs a second control for keeping a difference between the suction temperature value detected by the suction temperature detection unit (47) and the blowing temperature value constant,
The local air conditioner (1) according to claim 1 or 2. A suction humidity detector (49) for detecting the amount of moisture contained in the suction air;
The control unit (9) performs a third control for suppressing a decrease in the blowing temperature value when the suction humidity value detected by the suction humidity detection unit (49) is low.
The local air conditioner (1) according to claim 3.

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