CN110762615A

CN110762615A - Air conditioner

Info

Publication number: CN110762615A
Application number: CN201910179891.4A
Authority: CN
Inventors: 米仓幸治
Original assignee: Hitachi Johnson Controls Air Conditioning Inc
Current assignee: Johnson Controls Hitachi Air Conditioning Technology Hong Kong Ltd; Hitachi Johnson Controls Air Conditioning Inc
Priority date: 2018-07-26
Filing date: 2019-03-08
Publication date: 2020-02-07
Also published as: JP2020016394A

Abstract

The invention provides an air conditioner which can easily adjust static pressure even after assembly. The air conditioner comprises an indoor unit body (1), and a casing (3) which is fixedly provided on the outside of the indoor unit body (1) with respect to the indoor unit body (1). The casing (3) has a first ventilation opening (35) connected to the air inlet (15) of the indoor unit main body (1) and a second ventilation opening (36) communicating with the first ventilation opening (35). The case (3) has a plate-shaped static pressure adjusting member (4), and the static pressure adjusting member (4) is insertable into and removable from the outside of the case (3) between a first ventilation opening (35) and a second ventilation opening (36) in the case (3).

Description

Air conditioner

Technical Field

The present invention relates to an air conditioner.

Background

At the site of assembling the ducted indoor unit, the actual external static pressure in the assembled state may be lower than a previously designed value, and the external static pressure may be substantially absent in the ductless construction in which the duct is not used. In this case, the blower motor is operated at a rotational speed corresponding to the designed value of the external static pressure, and the external static pressure in the assembled state is actually low, so that the air volume becomes excessively large. Therefore, not only the efficiency of the blower motor is deteriorated, but also the operating noise is increased more than necessary, which may cause complaints.

Patent document 1 describes an air conditioner in which a baffle plate for adjusting the air volume is attached between a filter and an evaporator at an air intake port of a high static pressure type indoor unit of a split type air conditioner. Thereby, an appropriate air volume is obtained regardless of the magnitude of the ventilation resistance of the duct connected to the indoor unit.

Documents of the prior art

Patent document 1: japanese laid-open patent publication No. 7-280333

Disclosure of Invention

Problems to be solved by the invention

In the air conditioner described in patent document 1, a space for mounting a baffle plate for adjusting the air volume is provided inside the indoor unit. Further, when the baffle plate for adjusting the air volume is attached after the indoor unit is assembled, it is necessary to remove a panel constituting the casing and other difficult works, and the baffle plate for adjusting the air volume is previously attached to the inside and then the indoor unit is assembled. Therefore, in a case where the static pressure assumed in advance at the time of the site does not match the actual static pressure, a case where the contents of the duct work are changed in the middle, or the like, it is necessary to cope with the static pressure adjustment after the air conditioner is assembled. In this case, the cost and time of construction are greatly wasted.

The present invention has been made in view of such circumstances, and an object thereof is to provide an air conditioner capable of easily adjusting a static pressure even after assembly.

An air conditioner according to the present invention for solving the above problems includes: an indoor unit main body in which a heat exchanger and a blower are built; and a casing fixed to the indoor unit main body and provided outside the indoor unit main body. The above-mentioned box body has: a first air vent connected to an air inlet or an air outlet of the indoor unit main body; and a second vent hole communicating with the first vent hole. The case has a plate-shaped static pressure adjusting member that is inserted between the first ventilation opening and the second ventilation opening in the case from outside the case in an insertable and removable manner and adjusts the static pressure.

The effects of the invention are as follows.

According to the present invention, it is possible to provide an air conditioner in which the static pressure can be easily adjusted even after assembly.

Drawings

Fig. 1 is a diagram showing an external configuration of an air conditioner according to a first embodiment of the present invention.

Fig. 2 is a sectional view of the lower surface of the periphery of the indoor unit main body shown in fig. 1.

Fig. 3 is an enlarged perspective view of the periphery of the cartridge body shown in fig. 1.

Fig. 4 is a perspective view showing another static pressure adjusting member having a different static pressure adjustment amount.

Fig. 5 is a perspective view showing another static pressure adjusting member having a different static pressure adjustment amount.

Fig. 6 is a block diagram relating to control of a blower in an air conditioner.

Fig. 7 is a perspective view showing the static pressure adjusting member and the filter having the filter main body for trapping foreign matter having the same area as the opening of the static pressure adjusting member.

Fig. 8 is a perspective view showing a static pressure adjusting member according to another modification.

Fig. 9 is a perspective view showing a static pressure adjusting member according to another modification.

Fig. 10 is a diagram showing an external configuration of an air conditioner according to a second embodiment of the present invention.

In the figure:

1-indoor unit main body, 15-air inlet, 16-air outlet, 21-heat exchanger, 22-blower, 23-fan, 3-box, 35-first vent, 36-second vent, 4 a-4 d-static pressure adjusting component, 41-metal plate, 42 a-42 c-opening, 5 a-filter, 100 a-air conditioner.

Detailed Description

Embodiments of the present invention will be described in detail with reference to the accompanying drawings as appropriate.

In the drawings shown below, the same reference numerals are given to the common components and the same components, and overlapping description thereof will be appropriately omitted.

(first embodiment)

Fig. 1 is a diagram showing an external configuration of an air conditioner 100 according to a first embodiment of the present invention. Fig. 2 is a bottom sectional view of the periphery of the indoor unit main body 1 shown in fig. 1.

In the following description, for convenience of explanation, "front-back", "right-left", "up-down" will be referred to with reference to the directions shown in fig. 1 and 2.

Fig. 1 illustrates an example of a ceiling-mounted (ceiling-embedded) air conditioner 100, but the present invention is not intended to be limited to the form of the air conditioner to which the present invention is applied.

As shown in fig. 1, an air conditioner 100 of the present embodiment includes an indoor unit main body 1 disposed in a suspended manner in a ceiling space between a ceiling 7 and a ceiling panel 8 of a building. The air conditioner 100 includes an outlet grill 61, an outlet duct 62, the casing 3, an inlet duct 63, an inlet grill 64, and the like.

The indoor unit main body 1 includes a casing 11 forming an outer frame of the indoor unit main body 1, and a heat exchanger 21 and a blower 22 are housed in the casing 11. That is, the indoor unit main body 1 incorporates a heat exchanger 21 and a blower 22. The box body 11 is composed of four side panels 12 (a front panel 12F, a right panel 12R, a left panel 12L (see fig. 2), and a rear panel 12B), a top panel 13, and a bottom panel 14, which are arranged to face each other.

An air inlet 15 (see fig. 2) for sucking air into the casing 11 is formed in the rear side panel 12B of the casing 11, and an air outlet 16 (see fig. 2) for blowing air out of the casing 11 is formed in the front side panel 12F. The air outlet 16 is connected to the outlet duct 62. A suspension bracket 72 is fixed to the side panel 12 of the box 11, and the suspension bracket 72 is fastened to a suspension bolt 71 suspended from the ceiling 7 of the building.

As shown in fig. 2, the heat exchanger 21 exchanges heat with air passing through the heat exchanger 21 to cool or heat the air. The blower 22 includes a fan 23, a blower motor 24 for driving and rotating the fan 23, and a fan case 25 for housing the fan 23. An air inlet 26 for taking in air and an air outlet 27 for blowing out air are formed in the fan housing 25. Here, the blower 22 uses a plurality of (three in fig. 2) fans 23, but is not limited to this, and one or two fans 23 may be used, for example.

A partition wall 19 that divides the upstream space 17 and the downstream space 18 is provided inside the casing 11. A blower 22 is disposed in the upstream space 17, and a heat exchanger 21 is disposed in the downstream space 18. The fan casing 25 is provided so as to penetrate the partition wall 19 with the air outlet 27 facing the downstream side space 18.

Fig. 3 is an enlarged perspective view of the periphery of the case 3 shown in fig. 1.

As shown in fig. 2 and 3, a casing 3 is provided outside the indoor unit main body 1 so as to be fixed to the indoor unit main body 1 by, for example, a screw fastening member. The case 3 has a rectangular parallelepiped outer casing 31. The housing 31 is composed of four side panels 32 (a front panel 32F, a right panel 32R, a left panel 32L, and a rear panel 32B), a top panel 33, and a bottom panel 34, which are arranged to face each other.

In the present embodiment, the casing 3 has a first vent 35 connected to the air inlet 15 of the indoor unit main body 1, and a second vent 36 communicating with the first vent 35. The first ventilation opening 35 is formed in the front panel 32F, and the second ventilation opening 36 is formed in the rear panel 32B. A ventilation path 37 is formed between the first ventilation opening 35 and the second ventilation opening 36. The second ventilation opening 36 is connected to the suction duct 63.

The case 3 has a plate-like static pressure adjusting member 4 for adjusting static pressure, and the static pressure adjusting member 4 is inserted into and out of the case 3 between the first vent 35 and the second vent 36 in the case 3. In fig. 2, illustration of the static pressure adjusting member 4 is omitted.

In the present embodiment, insertion ports 38 for inserting the static pressure adjusting members 4 into the case 3 are formed in the right side plate 32R and the left side plate 32L, respectively. However, the insertion opening 38 may be formed in one of the right side panel 32R and the left side panel 32L, or may be formed in at least one of the top panel 33 and the bottom panel 34.

The static pressure adjusting member 4 includes a metal plate 41 having an opening 42 through which air can pass, and a rectangular parallelepiped support frame 43 supporting the metal plate 41. However, the support bracket 43 may be omitted when the static pressure adjusting member 4 is supported in the housing 31 without rattling. The static pressure can be adjusted by reducing the effective cross-sectional area of the ventilation path 37 by the metal plate 41 having the opening 42.

Fig. 4 and 5 are perspective views showing other static pressure adjusting members 4a and 4b having different static pressure adjustment amounts, respectively. The opening area of the opening 42a of the static pressure adjusting member 4a shown in fig. 4 is smaller than the opening area of the opening 42 of the static pressure adjusting member 4 shown in fig. 3. The opening area of the opening 42b of the static pressure adjusting member 4b shown in fig. 5 is smaller than the opening area of the opening 42a of the static pressure adjusting member 4a shown in fig. 4. Therefore, compared to the static pressure adjusting member 4 shown in fig. 3, the static pressure adjusting members 4a and 4b shown in fig. 4 and 5 are used, and the ventilation resistance is sequentially increased, so that the static pressure can be sequentially increased.

As shown in fig. 3, the case 3 has a filter 5 for trapping foreign matters in the air, and the filter 5 is inserted into and pulled out from the outside of the case 3 between a first ventilation opening 35 and a second ventilation opening 36 in the case 3. In fig. 2, the filter 5 is not shown.

The filter 5 includes a filter body 51 for capturing foreign matter and a rectangular parallelepiped support frame 52 for supporting the filter body 51. In fig. 3, one filter is used as the filter 5, but two filters may be used simultaneously in a superposed manner, for example.

Case 3 has a cover 39 for opening and closing insertion port 38 formed in case 31. By closing the cover 39, the static pressure adjusting member 4 and the filter 5 can be reliably held in the case 3, and air leakage can be more suppressed.

Returning to fig. 1, the outlet duct 62 is normally disposed to extend from the indoor unit main body 1. One end of the outlet duct 62 is connected to the air outlet 16 (see fig. 2) formed in the front panel 12F of the indoor unit main body 1 so as to be fitted thereto, and the outlet grill 61 is attached to the other end thereof. The blow-out grill 61 is provided at an appropriate position of the ceiling plate 8. By the rotation of the fan 23 in the indoor unit main body 1, indoor air is sucked into the indoor unit main body 1, and air heat-exchanged by the heat exchanger 21 is blown out into the room from the outlet grill 61 through the outlet duct 62.

A single suction duct 63 is normally connected to the air inlet 15 (see fig. 2) formed in the rear panel 12B of the indoor unit main body 1 via the casing 3. A suction grill 64 is fitted to one end of the suction duct 63, and the suction grill 64 is provided at an appropriate position on the ceiling plate 8. Indoor air is taken in from the suction grill 64, passes through the suction duct 63, and is sucked into the indoor unit main body 1 through the casing 3. Further, the lower opening of the indoor unit main body 1 is closed by a main body cover 20. Further, the ceiling plate 8 is provided with an inspection opening 81, and the inspection opening 81 is closed by an inspection opening cover 82.

Fig. 6 is a block diagram relating to control of the blower 22 in the air conditioner 100.

As shown in fig. 6, the air conditioner 100 includes a control unit 91 that controls each unit such as the blower 22. The electric power supplied from the power supply 92 is input to the blower motor 24 through the input frequency converter 93. The blower motor 24 is connected to the fan 23 so as to transmit rotational force to the fan 23, and is controlled by the control unit 91.

The operation unit 95 is connected to the control unit 91. The operation unit 95 performs setting of operation conditions, and instructions such as start and stop of operation based on user operations. One of the rotation speeds (in order of high to low, H rush, sharp, strong, and weak) of the fan 23 of, for example, four stages of stages set as standards can be selected and designated by the operation unit 95. The control unit 91 can perform a speed increase setting (for example, H rush, and strong wind in this order) corresponding to each level of the standard setting, that is, can set the rotation speed of each level to a speed equal to or higher than the standard set reference rotation speed.

When the operation of the air conditioner 100 is started, as shown in fig. 2, the indoor air passes through the suction duct 63 by the blowing operation of the blower 22, and is sucked into the indoor unit main body 1 through the casing 3. The air sucked into the indoor unit main body 1 is cooled or heated by the heat exchanger 21, and then blown out from the air outlet 16 into the room through the outlet duct 62.

Here, by inserting and disposing the static pressure adjusting member 4 in the case 3, the ventilation resistance when the air passes through the case 3 becomes large, and the static pressure becomes high. When the static pressure detected by the pressure sensor 94 is higher than a predetermined value determined in advance, the control unit 91 switches the rotation speed of the fan 23 from the standard setting to the speed increase setting.

As described above, the air conditioner 100 of the present embodiment includes the indoor unit main body 1 and the casing 3 fixedly provided on the outside of the indoor unit main body 1 with respect to the indoor unit main body 1. The casing 3 has a first ventilation opening 35 connected to the air inlet 15 of the indoor unit main body 1, and a second ventilation opening 36 communicating with the first ventilation opening 35. The case 3 has a plate-shaped static pressure adjusting member 4, and the static pressure adjusting member 4 is inserted into and out of the case 3 between the first ventilation opening 35 and the second ventilation opening 36 in the case 3.

According to such a configuration, when the on-site off-site static pressure is lower than a pre-designed value or when there is no pipe, the static pressure can be easily increased by inserting the static pressure adjusting member 4 into the case 3. This prevents the air volume from becoming excessively large, and thus prevents unnecessary increase in operating noise and deterioration in the efficiency of the blower motor 24. Further, by adding or changing the static pressure adjusting member 4 after the construction on site, the static pressure can be easily adjusted after the air conditioner 100 is assembled.

That is, according to the present embodiment, the air conditioner 100 in which the static pressure can be easily adjusted even after assembly can be provided.

In the present embodiment, the first vent 35 is connected to the air intake port 15. The case 3 has a filter 5 for trapping foreign matters in the air, and the filter 5 is inserted into and pulled out from the outside of the case 3 between the first ventilation opening 35 and the second ventilation opening 36 in the case 3. With this configuration, a filter case that is often used in connection with the air inlet 15 of the indoor unit main body 1 is used, and the static pressure adjusting member 4 can be inserted into the filter case as well as the filter 5.

In the present embodiment, the static pressure adjusting member 4 is disposed upstream of the filter 5 in the flow of air. In such a configuration, as shown in fig. 7, the filter 5a in which the filter main body 51 for trapping foreign matter having the same area as the opening 42 is present in the portion of the filter 5a corresponding to the opening 42 of the static pressure adjusting member 4 can be used. In this case, the air having passed through the opening 42 of the static pressure adjusting member 4 can directly flow straight through the filter main body 51. Therefore, the area occupied by the filter main body 51 in the filter 5a can be reduced. Thereby downsizing the filter body 51 and reducing the cost.

The filter 5a and the static pressure adjusting member 4 disposed upstream of the filter 5a may be fixed and integrated. In this way, the area of the filter body 51 of the filter 5a matches the area of the opening 42 of the static pressure adjusting member 4, and it is possible to prevent the filter from being used in a wrong combination.

In the present embodiment, when the static pressure is higher than the predetermined value determined in advance, a speed increase setting is performed in which the rotation speed of the fan 23 of the blower 22 is set to a speed equal to or higher than the reference rotation speed set in the standard setting. Here, as a result of the static pressure being increased more than necessary due to the provision of the static pressure adjusting member 4, it is considered that the air volume is reduced and the necessary performance cannot be exhibited. However, according to the above configuration, the performance can be prevented from being degraded by performing the speed increase setting.

In the present embodiment, the static pressure adjusting member 4 includes the metal plate 41, and the metal plate 41 includes the opening 42 that allows ventilation. With this configuration, the area and arrangement of the opening 42 in the static pressure adjusting member 4 can be easily set and implemented. This makes it possible to easily adjust the aperture ratio and to adjust the flow of air. However, a resin plate may be used instead of the metal plate 41.

Fig. 8 is a perspective view showing a static pressure adjusting member 4c according to another modification. Hereinafter, differences from the above-described embodiment will be mainly described, and descriptions of the same points will be omitted.

The static pressure adjusting member 4c shown in fig. 8 is configured to be able to change the adjustment amount of the static pressure adjusted by the static pressure adjusting member 4c, which is different from the above-described embodiment in which the opening area of the opening portion 42 in the static pressure adjusting member 4 is fixed.

As shown in fig. 8, the static pressure adjusting member 4c includes a metal plate 41 having an opening 42 through which air can pass, and a sliding plate 44 that can block a part of the opening 42. The slide plate 44 is movable and adjustable in a direction perpendicular to the air flow direction (the left-right direction in fig. 8) on, for example, the upstream side of the opening 42. That is, the effective opening area of the opening 42 through which air actually passes can be adjusted.

With this configuration, the static pressure can be adjusted more accurately. Further, since it is not necessary to prepare a plurality of static pressure adjusting members 4c in advance according to the amount of adjustment of the static pressure, it is easy to store the static pressure adjusting members 4c, and the cost is reduced.

The mechanism capable of changing the adjustment amount of the static pressure is not limited to the mechanism using the slide plate 44 shown in fig. 8, and for example, a mechanism that adjusts the opening area of the throttle by moving the throttle blade by rotating a dial or the like may be used.

Fig. 9 is a perspective view showing a static pressure adjusting member 4d according to another modification. Hereinafter, differences from the above-described embodiment will be mainly described, and descriptions of common points will be omitted.

The static pressure adjusting member 4d shown in fig. 9 includes a metal plate 41, and the metal plate 41 has an opening 42c through which air can flow, and the opening 42c is formed at a position where the air having passed through the opening 42c flows uniformly with respect to the fan 23 (see fig. 2) of the blower 22.

By blocking a part of the ventilation path 37 formed between the first ventilation opening 35 and the second ventilation opening 36 by the static pressure adjusting member 4d, the wind is disturbed, the load applied to the fan 23 of the blower 22 is unbalanced, and as a result, abnormal noise may occur. However, in the static pressure adjusting member 4d, the air passing through the opening 42c flows in a balanced manner with respect to the fan 23 on the downstream side, so that the flow of the air becomes smooth, the load applied to the fan 23 becomes the same, and the generation of abnormal noise can be suppressed.

In fig. 9, a plurality of openings 42c are formed at positions corresponding to the respective positions of the plurality of fans 23 (see fig. 2). That is, a straight line in the front-rear direction passing through the center of the opening 42c passes through the center of the fan 23. According to such a configuration, even when the blower 22 includes the plurality of fans 23, the air having passed through the opening 42c of the static pressure adjusting member 4d can be uniformly flowed to each of the plurality of fans 23.

In the case where the blower 22 has, for example, one fan 23, the opening 42c is desirably formed at a position corresponding to the position of the fan 23.

(second embodiment)

Fig. 10 is a diagram showing an external configuration of an air conditioner 100a according to a second embodiment of the present invention. Hereinafter, differences from the first embodiment will be mainly described, and descriptions of common points will be omitted. The air conditioner 100a shown in fig. 10 is a built-in type air conditioner.

As shown in fig. 10, the air conditioner 100a includes an indoor unit body 1 disposed in a suspended manner in a ceiling space, an outlet grill 61, an outlet duct 62, a casing 3, a ceiling panel 65, and the like. In the built-in air conditioner 100a, a ceiling panel 65 is connected to a lower opening that serves as an air inlet of the indoor unit main body 1 via the casing 3. The air conditioner 100a sucks indoor air from the ceiling panel 65 and introduces the air into the indoor unit main body 1 through the casing 3.

In the second embodiment, the static pressure adjusting member 4 (see fig. 3) can be inserted into the case 3 from the outside of the case 3 so as to be able to be inserted and pulled out in the horizontal direction. According to the second embodiment, as in the first embodiment, the static pressure can be easily adjusted even after the air conditioner 100a is assembled.

The present invention has been described above based on the embodiments of the present invention, but the present invention is not limited to the above embodiments and includes various modifications. For example, the above-described embodiments have been described in detail to explain the present invention easily and understandably, and are not limited to having all the configurations described. Moreover, a part of the structure of one embodiment may be replaced with the structure of another embodiment, and the structure of another embodiment may be added to the structure of one embodiment. Further, it is possible to add, delete, or replace a part of the configuration of the above embodiment with another configuration.

For example, in the above-described embodiment, the static pressure adjusting member 4 is configured to have the metal plate 41, and the metal plate 41 has the opening 42 that allows ventilation, but the present invention is not limited thereto. For example, the static pressure adjusting member may be configured to have a functional member made of a material having sound absorbing performance or oil resistance and being capable of ventilation. With this configuration, the static pressure can be adjusted by the static pressure adjusting member, and in addition, the sound absorbing performance and the oil resistance can be obtained at the same time. Accordingly, the air conditioners 100 and 100a can be applied to a quiet environment where sound absorption performance is required, or a heavy oil environment such as a kitchen where oil resistance is required.

In this case, it is desirable to prepare a plurality of static pressure adjusting members having different static pressure adjustment amounts by changing the thickness (density), material, thickness, and the like of the mesh of the functional member.

In the above-described embodiment, the first vents 35 of the casing 3 are connected to the air inlet 15 of the indoor unit main body 1, but the present invention is not limited thereto, and may be connected to the air outlet 16 of the indoor unit main body 1. In this case, the second ventilation opening 36 is connected to the blow-out duct 62. The cartridge 3 is prepared separately from the cartridge for the filter. With this configuration, the same operational effects as those of the above-described embodiment can be obtained.

In the above-described embodiment, for example, the air conditioner 100 includes the outlet duct 62 and the inlet duct 63, but is not limited thereto. That is, the air conditioner 100 may be used in a configuration without at least one of the outlet duct 62 and the inlet duct 63.

Claims

1. An air conditioner is characterized by comprising:

an indoor unit main body in which a heat exchanger and a blower are built; and

a casing fixedly provided on an outer side of the indoor unit main body with respect to the indoor unit main body,

the above-mentioned box body has:

a first air vent connected to an air inlet or an air outlet of the indoor unit main body;

a second vent hole communicating with the first vent hole; and

and a plate-shaped static pressure adjusting member that is inserted between the first ventilation opening and the second ventilation opening in the case body from outside the case body so as to be able to be inserted and pulled, and that adjusts static pressure.

2. The air conditioner according to claim 1,

the first air vent is connected with the air suction inlet,

the box body is provided with a filter for catching foreign matters in the air, and the filter can be inserted into and pulled out from the outside of the box body between the first ventilation opening and the second ventilation opening in the box body.

3. The air conditioner according to claim 2,

the static pressure adjusting member is disposed upstream of the filter in the flow of air.

4. The air conditioner according to claim 2,

the static pressure adjusting member has a plate having an opening portion capable of ventilation,

the opening is formed at a position where the air passing through the opening flows uniformly with respect to the fan of the blower.

5. The air conditioner according to claim 4,

the blower is provided with a plurality of fans,

a plurality of the openings are formed at positions corresponding to respective positions of the plurality of fans.

6. The air conditioner according to claim 1,

when the static pressure is higher than a predetermined value determined in advance, a speed increase setting is performed in which the rotation speed of the fan of the blower is set to a speed equal to or higher than a reference rotation speed set in a standard manner.

7. The air conditioner according to claim 1,

the static pressure adjusting member includes a metal plate having an opening portion through which air can pass.

8. The air conditioner according to claim 1,

the static pressure adjusting member has a functional member made of a material having sound absorbing performance or oil resistance and being capable of ventilation.

9. The air conditioner according to claim 1,

the static pressure adjusting member is configured to be capable of changing an adjustment amount of the static pressure adjusted by the static pressure adjusting member.