MX2014002117A

MX2014002117A - Indoor unit and air conditioning apparatus.

Info

Publication number: MX2014002117A
Application number: MX2014002117A
Authority: MX
Inventors: Jumpei Kudo
Original assignee: Mitsubishi Electric Corp
Priority date: 2013-02-22
Filing date: 2014-02-21
Publication date: 2014-09-01
Also published as: MX350193B; GB2513694B; GB2527193B; JP2014163563A; GB201401968D0; GB201507315D0; CN104006446B; CN203771556U; CN104006446A; GB2527193A; JP6071626B2; GB2513694A

Abstract

An indoor air conditioning unit comprises a human body detector 5 to detect a person within an air-conditioned space, an air inlet 3b through which air is taken into a main body 1 and a plurality of air outlets 3a through which air from the main body is blown out at different positions. A plurality of vanes 4 at the respective air outlets 3a control the direction in which the air is blown out. The vanes are controlled by a control unit which determines on the basis of the human body detector which of the outlets blows air towards the inlet during a short cycle (or short-circuit cycle). The air-conditioned space may be divided into a plurality of areas corresponding to the outlets and the outlet at which the short cycle is performed may be determined on the basis of the detector 5 as corresponding to an area where no person is detected. The unit may detect the temperature of the air blown out from each outlet to determine whether to perform the short cycle and may include a heat exchanger, or an outdoor unit connected by a pipe to form a refrigerant circuit.

Description

INTERNAL UNIT AND AIR CONDITIONER APPARATUS TECHNICAL FIELD The present invention relates to an indoor unit or the like in an air conditioning apparatus of the heat pump type.

BACKGROUND OF THE INVENTION For example, a compressor, a condenser (heat exchanger), an expansion device (expansion valve) and an evaporator (heat exchanger) are basically connected in an air conditioner of the type of heat pump using a refrigeration cycle. heat) through pipes to form a refrigerant circuit through which a refrigerant circulates. By using the property in which the refrigerant extracts heat from and discards heat from the air or the like which is an objective of the heat exchange when it evaporates and condenses, an air conditioning space is conditioned while the pressure in the pipeline is changed . For example, during a normal heating operation, the air over which the condenser performs heat exchange is expelled into the air conditioning space, whereby heating is performed.

For example, here in an air conditioner of the existing type of heat pump, in the case where this is immediately after starting a heating operation (in particular, the temperature of the room is low), for example, when a heat load is low and the air conditioning apparatus operates at an energy level close to its minimum energy level, the condensing temperature increases. In this way the temperature of the exhausted air decreases and this can provide a user (person in a room) with a sensation of cold wind.

In this way, when the temperature of the exhausted air becomes equal or lower than a predetermined temperature during a heating operation, a short cycle (short circuit) is performed in which air expelled from an air outlet is guided to an intake of air. air, so that it is avoided to provide a feeling of cold wind to the user (for example, see Patent Literature 1).

List of appointments Patent Literatures [Patent Literature 1] Japanese Unexamined Patent Application Publication No. 20 1 -052848 (paragraph

[0008],

[0038],

[0039] and figure 3).

BRIEF DESCRIPTION OF THE INVENTION Technical problem When the short cycle is performed, it is possible to avoid providing a feeling of cold wind to the user (person in the room), but it is impossible to warm up in the air conditioning space during the short cycle. Therefore, the following problem exists. When a temperature expelled at the end of the short cycle is set to high, the time to normal operation (heating) is extended. On the other hand, when the temperature expelled in the short cycle is adjusted to low, there is a possibility of providing a feeling of cold wind to the user.

The present invention has been made to solve the aforementioned problem, and an object of the present invention is to obtain an internal unit or the like, which is capable of rapidly changing to normal operation while using a short cycle.

Solution to the problem The internal unit according to the present invention includes: a means for detecting human bodies configured to detect a person inside an air conditioning space; an air intake through which air is drawn into a main body; a plurality of air outlets from which air is expelled from the main body in different positions, respectively; a plurality of vanes provided in the respective air vents and which control the direction in which the air is expelled; and an internal control unit that controls the blade provided in the air outlet that is determined based on the detection of the medium for detecting human bodies and that performs a short cycle in which the air expelled from the determined air outlet is guided to the air intake.Uncle.

Advantageous Effects of the Inven The input unit of the present inven determines an air outlet in which the short cycle is performed, of a plurality of air outlets based on the detec of the medium for detecting human bodies. In this way, for example, by performing the short cycle in the air outlet through which air is expelled in a direc in which no user is present, it is possible to perform the short cycle without providing a feeling of discomfort to the user. user, and it is possible to quickly switch to normal opera.

BRIEF DESCRIP OF THE DRAWINGS Figure 1 is a schematic diagram showing the complete configura of an air condiing apparatus according to the embodiment 1 of the present inven.

Figure 2 is a perspective view showing an installa example of an indoor unit X according to the embodiment 1 of the present inven.

Figure 3 is a perspective view showing the appearance of the internal unit X according to the embodiment 1 of the present inven.

Figure 4 is a cross-secal view showing the configura of a main part inside the internal unit X according to the embodiment 1 of the present inven.

Figure 5 is a partially enlarged cross-secal view showing a configura around an air outlet 3a of the internal unit X.

Figure 6 is a diagram explaining the control of a short cycle according to the mode 1 of the present inven.

Figure 7 is a diagram explaining a method of an internal control unit X1 according to the embodiment 1 of the present inven.

DETAILED DESCRIP OF THE MODALITIES Modality 1 Figure 1 is a schematic diagram showing the complete configura of an air-condiing apparatus in accordance with the embodiment 1 of the present inven. In Figure 1, in the mode air condier, an indoor unit X (a device within the internal unit X) and an external unit Y (a device within the external unit Y) are connected by a pipeline of liquid extension A and a gas extension pipe B to form a refrigerant circuit. The external unit Y installed outside of an air-condiing space includes, for example, a compressor, an outdoor-side heat exchanger, and the like, and carries heat (thermal energy, chiller energy) to the indoor unit X through the liquid extension pipe A and gas extension pipe B. A medium that carries heat is a refrigerant. The internal unit X includes an internal heat exchanger 8, described below, and the like, and the heat carried by the refrigerant is supplied to the air in a room which is an air condiing space, whereby the room is heated or cooled . The internal unit X will be described later.

A connec relaship between communica devices will also be described. An internal control unit X1 included in the internal unit X and an external control unit Y1 included in the external unit Y are connected by a communica line C. In addi, a remote controller Z (hereinafter referred to as the remote Z) ) installed in the air condiing space and the internal control unit X1, are interconnected by a communica line C. In this way it is possible to carry out the transmission / recep of several signals between the Z remote, the internal control unit X1 and the external control unit Y1. For example, here the communica can be performed between the remote Z and the internal control unit X1 wirelessly instead of using the communica line C, although it is not limited in particular.

Figure 2 is a perspective view showing an installa example of the indoor unit X according to the embodiment 1 of the present inven. As shown in Figure 2, the internal unit X of the embodiment is an internal unit of ribbon type that can be mounted mainly when it is embedded in a hole formed in the ceiling, for example, a ceiling inside a building (a air condiing space).

Figure 3 is a perspective view of the appearance of the internal unit X according to the embodiment 1 of the present invention. As shown in FIG. 3, the internal unit X of the embodiment, a cabinet 1 which is a rectangular housing (box body) and which is the main body of the internal unit, is received in the hollow of the ceiling. A decorative panel 2 of substantially square shape, which is provided below the cabinet 1 for covering a lower opening of the cabinet 1 is provided in such a condition as to be seen from inside a room. An air intake 3b of substantially square shape is located in and near the center of the decorative panel 2 and is covered with an air filter 11 supported by a grid 12. In addition, an air outlet 3a is located around the air intake 3b and along each side (four sides) of the decorative panel 2. In addition, a blade 4 is provided at each air outlet 3a and controls an address in which the air conditioner is ejected (wind direction). The control of the position of each blade 4 is carried out by means of the internal control unit X1. The internal control unit X1 is able to independently control the position and the impulse of each blade 4. Furthermore, the internal unit X of the embodiment includes, for example, an infrared sensor 5, which is a means for detecting human bodies Of the means forming the infrared sensor 5, a housing 5a that protects a portion of the sensor for detection and a detection hole 5d that is open for detection, are formed in the decorative panel 2.

Figure 4 is a cross-sectional view showing the configuration of a main part inside the internal unit X according to the embodiment 1 of the present invention. The infrared sensor 5 further includes a sensor box 5b, a motor 5c and a portion of the main body of the sensor 5e. The main body portion of the sensor 5e is a portion that actually performs detection (detection). In the modality, the detection is carried out with a temperature sensor (infrared sensor). Here, the temperature detection of the main body portion of the sensor 5e has directionality. The motor 5c is driven to direct the portion of the main body of the sensor 5e in a range in which a temperature (person) must be detected. In this way, for example, the infrared sensor 5 of the modality is capable of detecting the presence / absence of a person in a range in which there is a possibility of providing a feeling of wind cold when the operation starts. In addition, the sensor box 5b stores there the portion of the main body of the sensor 5e.

In addition, a turbofan 7 is mounted in the cabinet 1 and forms an air flow that passes from the air intake 3b to each air outlet 3a when a fan motor 6 is driven. Here, a bell mouth 14 for adjusting the flow of air that has passed through the air intake 3b (air filter 11) and which causes the turbofan 7 to suck the air, is arranged on an air suction side of the turbofan 7. A temperature sensor 13 for detecting a temperature sucked by the turbofan 7 is mounted in the bell mouth 14. In addition, a temperature sensor 15 which is an internal temperature sensing means ejected to detect the temperature of air that is passed through and conditioned through the exchanger of internal heat 8 and being expelled into the room (an internal temperature expelled Ta), is provided near the air outlet 3a.

The internal heat exchanger 8 is arranged inside the cabinet 1 so as to surround the turbofan 7. In addition, an inner cover 9 is disposed within an upper surface and side surfaces of the cabinet 1 in a space that is a wind path between a inner wall side of the cabinet 1 and the internal heat exchanger 8, and from the outside of the internal unit thermally insulates air in which a heat exchange is made in the internal heat exchanger 8.

In addition, a drain tank 10 is disposed below the internal heat exchanger 8 and receives water generated in the heat exchange in the internal heat exchanger 8. The aforementioned decorative panel 2 is provided below the drain tank 10.

Next, an operation of the air conditioner will be described. After receipt of a signal including an operation instruction (cooling operation, heating operation, dehumidification operation, etc.) from the remote Z, the internal control unit X1 sends the operating instruction to the control unit external Y1 of the external unit Y and drives the fan motor 6 based on the operating instruction to initiate air conditioning inside the room.

After receiving, via the internal control unit X1, a signal including an operating instruction sent from the remote Z, the external control unit Y1 controls the compressor at an operating frequency corresponding to the operation instruction. Further, when the internal control unit X1 indicates the operating frequency of the compressor, the external control unit Y1 controls the compressor based on the instruction of the operating frequency included in a signal sent from the internal control unit X1 through the communication line C. When the operating frequency is increased, the rotation speed of the compressor increases; and when the operating frequency decreases, the speed of rotation of the compressor decreases.

Fig. 5 is a partially enlarged cross-sectional view showing a configuration around an air outlet 3a of the internal unit X. Here, in Fig. 5, the air passing through an airflow path 16 it passes through the air outlet 3a. A structure on an outer peripheral side of the air intake 3a is covered with an outer passage portion of the air flow path 20. Further, it refers to an outer peripheral end portion of the blade 4 as a peripheral side end. , and refers to an inner peripheral end portion of the blade 4 as a peripheral side end 19.

Next, a short cycle will be described. For example, at the time of starting a heating operation or the like, the internal control unit X1 determines the temperature of the air expelled from the air outlet 3a or whether the condensing temperature of the refrigerant when the internal heat exchanger 8 works As a capacitor, it is low. When it is determined to be low, the internal control unit X1 tilts the blade 4 so that the outer peripheral side end 18 is located above the inner peripheral side end 19, to cause the outer peripheral side end 18 to come into contact with the outer peripheral side end 18. or approaching the outer passage portion of the airflow path 20. When, for example, the outer peripheral lateral end 18 of the blade 4 comes into contact with the outer passage portion of the airflow path 20, the air that is about to exit the outer peripheral side is blocked and an opening 17 arises on the inner peripheral side. In this way, the air flows at length of the inclination of the blade 4 towards the inner peripheral side. In the internal unit X of the mode, there is the air intake 3b in a direction towards the inner peripheral side of the air outlet 3a. In this way, air is guided from the air outlet 3a in the direction of the air intake 3b. Here, when the short cycle is performed, the volume of air may be less than that in normal operation.

In the internal heat exchanger 8, its metal structure itself has a thermal capacity. The temperature of the internal heat exchanger 8 is substantially the same as the temperature of the room at the time of start-up (at the time of starting the operation). In this way, after starting, the same internal heat exchanger 8 must first be heated, and this is part of the reason for delaying a moment until reaching the set temperature. In this way, for example, when performing the short cycle at the moment of the start, the air that is gradually heated by the heat exchange is circulated during a heating operation, so it is possible to quickly heat the internal heat exchanger 8 at the set temperature.

Here, as described above, the internal control unit X1 is able to independently control the position and the impulse of each blade 4. In this way, it is allowed to perform the short cycle in some of the four air outlets 3a of the internal unit X of the modality. The vanes 4 arranged in the rest of the air outlets 3a are allowed to be inclined between a substantially vertical downward direction and a substantially horizontal direction in a similar manner, that during the normal heating operation.

For example, when the interior temperature is particularly low, the temperature of the sucked air is low. In this way, even when air is passed through the internal heat exchanger 8 and there is a heat exchange there, a quantity of heat conferred to the air is sufficient, and it may be impossible to expel air having a sufficiently warm temperature. In this case, when carrying out the short cycle in the air outlet 3a, it is possible to suck air having a higher temperature than the internal air and perform the heat exchange. In this way it is possible to compensate for the lack of heat quantity by returning to circulate heat during heating and, for example, it is possible to supply air that substantially has the set temperature, to the room.

Figure 6 is a diagram explaining the control with respect to the short cycle according to the mode 1 of the present invention. In the embodiment, for example, as shown in Figure 6, an area surrounding the internal unit X is divided into four areas corresponding to the respective air outlets 3a, and the infrared sensor 5 detects the presence / absence of One person in each area. The infrared sensor 5 is activated in steps of 90 degrees in the horizontal direction for a certain time, to perform the detection of temperature in each area during a determined time to detect the presence / absence of a person. For the blade 4 arranged in the air outlet 3a corresponding to the area in the that it is determined that a person is present, for example, the internal control unit X1 performs control in the same manner as during a normal heating operation, unless it is possible to expel air that does not provide a cold wind sensation. On the other hand, the blade 4 is arranged in the air outlet 3a which corresponds to the area in which it is determined that there is no person, the blade 4 is controlled to a position in which the short cycle is performed. By means of the internal control unit X1 which determines the air outlet 3a in which the short cycle is carried out, based on the presence / absence of a person detected by the infrared sensor 5, for example, it is possible to supply warm air having substantially the adjusted temperature, to a person present in the room.

Here, for example, when there are people present in all areas, the short cycle can be carried out later in rotation in each air outlet 3a.

In addition, the four air outlets 3a can be made in two pairs and the short cycle can be subsequently carried out in rotation in each of the pairs of air outlets 3a.

Figure 7 is a diagram explaining a procedure of the internal control unit X1 in the internal unit X according to the embodiment 1 of the present invention. A procedure of the internal control unit X1 during heating will be described with reference to figure 7.

First, based on an operation instruction from the remote Z, the internal control unit X1 performs the control in the normal heating operation (step S10).

Then, based on the temperature with respect to the detection of the temperature sensor 15, the internal control unit X1 determines whether the internal temperature expelled Ta is less than a threshold T1 (step S11). When it is determined that the internal temperature expelled Ta is not less than the threshold T1 (for example 33 ° C) (the internal temperature expelled Ta is greater than the threshold T1), the internal control unit X1 controls the blades 4 on all the outputs of air 3a to positions for normal operation (step S18).

On the other hand, when it is determined that the internal temperature expelled Ta is less than a threshold T1, the internal control unit X1 determines that there is a possibility that the user feels cold with the air expelled and controls the blades 4 at all outputs of air 3a to positions for the short cycle, and the short cycle is performed (step S12). In this way, the condensation temperature in the internal heat exchanger 8 is increased (the temperature at which the refrigerant passes through it).

Then, the internal control unit X1 determines whether the internal temperature expelled Ta is greater than T2 (for example, 39 ° C) (step S13). When it is determined that the internal temperature expelled Ta is equal to or less than threshold T2, the internal control unit X1 returns to S12 and continues with the short cycle.

When it is determined that the internal temperature expelled Ta is greater than the threshold T2, the internal control unit X1 determines the presence / absence of a person in each area described above, based on the detection of the infrared sensor 5 (step S14). Then, the internal control unit X1 determines whether the number of areas in which there are people present is equal to or less than 2 (step S15). When it is determined that there are people in three or more areas, the internal control unit X1 continues with the short cycle. This is because, for example, to expel air from the air outlets 3a corresponding to the three or more locations, the amount of heat that can be supplied to the air in the internal heat exchanger 8 is insufficient, and there is a possibility of providing the user with a feeling of cold wind.

On the other hand, when the internal control unit X1 determines that the number of areas in which people are present is equal to or less than 2, the internal control unit X1 determines that a reduction in the condensation temperature is small and possible. sending air without providing a cold wind sensation, and only controlling the blades 4 in the air outlets 3a corresponding to the areas in which it is determined that there are people present, in the same way as during normal operation (step S16).

In addition, the internal control unit X1 determines whether the internal temperature expelled Ta is greater than T3 (for example, 42 ° C) (step S17). When it is determined that the internal temperature expelled Ta is greater than the threshold T3, the internal control unit X1 determines that the The condensation temperature is high enough, it controls the blades 4 in all the air outlets 3a in the same way as during the normal operation (step S18) and the procedure ends. When it is determined that the internal temperature expelled Ta is not greater than the threshold T3 (the internal temperature expelled Ta is equal to or less than the threshold T3), the internal control unit X1 returns to S14 and continues with the procedure.

As described above, in the internal unit X of the mode, the internal control unit X1 determines a distribution of users in the room based on the detection of the infrared sensor 5 and adjusts the corresponding blades 4 with the directions in those that there are people present, to normal directions. In this way, for example, immediately after starting the compressor provided in the external unit Y, it is possible to supply warm wind to the user without making the user feel cold even when the condensing temperature is low, and it is possible to quickly provide a space nice.

Mode 2 In the modality 1 described above, when there are people present in three or more areas, the short cycle is carried out in all directions. However, the short cycle can be performed in expulsions only in two directions in rotation.

In addition, in mode 1 it is determined whether or not the short cycle is performed based on the internal temperature ejected Ta, but the present invention is not limited to this. For example, it can be determined based on the condensation temperature in the internal heat exchanger 8.

In addition, the internal four-way tape type unit X has been described in the above-described embodiment 1, but the shape of the internal unit X is not limited to the four-way tape type, as long as it is possible to perform the control and the like described in the embodiment 1. Furthermore, the present invention can be applied to an air conditioning apparatus having a configuration in which the internal unit X and the external unit Y are integrated with each other.

List of reference numbers X internal unit, X1 internal control unit, Y external unit, Y1 external control unit, remote Z, A liquid extension pipe, B gas extension pipe, C communication line, 1 cabinet, 2 decorative board, 3a air outlet, 3b air intake, 4 wing, 5 infrared sensor, 5th housing, 5b sensor housing, 5c motor, 5d detection hole, 5e portion of the main body of the sensor, 6 fan motor, 7 turbofan, 8 heat exchanger internal heat, 9 inner cover, 10 drain tank, 11 air filter, 12 grid, 13 temperature sensor, 14 bell mouth, 15 temperature sensor, 16 air flow path, 17 opening, 18 peripheral side end outer, inner peripheral side end, outer pass portion of the air flow path.

Claims

NOVELTY OF THE INVENTION CLAIMS

1. - An internal unit comprising: a means for detecting human bodies, configured to detect a person inside an air conditioning space; an intake of air through which air is drawn to the main body; a plurality of air outlets through which air is expelled from the main body to different positions, respectively; a plurality of vanes provided in the respective air outlets and controlling a direction in which the air is expelled; and an internal control unit that controls the blade provided in the air outlet that is determined based on detection of the detection medium of human bodies and which performs and short cycle in which the air expelled from the determined air outlet is guided towards the air intake.

2. - The internal unit according to claim 1, further characterized in that it additionally comprises an expired temperature detection means, configured to detect an air temperature expelled from each air outlet; wherein the internal control unit determines whether it performs the short cycle, based on a temperature that corresponds to the detection of the internal temperature detection means ejected.

3. - The internal unit according to claim 1, further characterized in that it additionally comprises a heat exchanger provided in the main body and configured to exchange heat between a refrigerant and air, wherein the internal control unit determines whether it performs the short cycle, based on a condensing temperature of the refrigerant in the heat exchanger.

4. - The internal unit according to any of claims 1 to 3, further characterized in that the air conditioning space is divided into a plurality of areas corresponding to the air outlets, and the internal control unit adjusts the corresponding air outlet to the area to which it is determined, based on the detection of the means of detecting human bodies that no person is present, such as an air outlet in which the short cycle is performed.

5. - An air conditioner comprising: the internal unit of any of claims 1 to 4; and an outdoor space unit connected to the internal unit by a pipe to form a refrigerant circuit through which a refrigerant circulates.