JP3781586B2 - Refrigerant heating device for air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a supply / exhaust structure of a refrigerant heating device for an air conditioner.
[0002]
Conventionally, in a refrigerant-heated air conditioner, air in the main body casing that has been opened to the outside through the gap or opening of the main body casing is sucked with a blower for combustion and blown to the combustion section to be used for combustion. After exhausting heat and using combustion heat, the exhaust pipe was discharged out of the main casing.
[Problems to be solved by the invention]
[0003]
However, in such a conventional apparatus, when strong wind is blown by, for example, a blizzard, combustion can be continued during strong combustion, but supply and exhaust are performed during weak combustion. The pressure balance of the engine collapsed, causing abnormal combustion and misfire.
[0004]
By the way, in order to maintain the pressure balance between air supply and exhaust under strong wind, it can be solved by bringing the air supply port and the exhaust port close to each other. As such, for example, a supply / exhaust used in a combustion apparatus called FF type is used. Like a cylinder, it has a double pipe structure with an air supply pipe on the outer periphery of the exhaust pipe, and this double pipe structure is branched into a single pipe for supply and exhaust from the middle and connected to the exhaust path and supply path. There was something that consisted of.
[0005]
However, if such a double-pipe structure air supply / exhaust cylinder is used in a refrigerant heating device of an air conditioner, the space occupied by the air supply / exhaust structure is very large, leading to an increase in size and cost of the device.
[0006]
Accordingly, the present invention provides a compact air conditioner refrigerant heating device that can continue stable combustion without losing the pressure balance between the supply air and the exhaust gas under strong winds even during strong or weak combustion. The issue is to provide.
[0007]
[Means for Solving the Problems]
The present invention pays attention to this point, and in order to solve the above-mentioned drawbacks, in particular, the configuration thereof is an air conditioner in which a combustion blower, a combustion unit, a refrigerant heating heat exchanger, an exhaust pipe are provided in this order, and the front surface of the main body is covered with a front panel. The combustion fan is provided with an intake port facing the front side of the main body on one end side of the main body, and the exhaust pipe is provided facing the front side of the main body on the other end side of the main body, Opening a combustion air inlet having an opening larger than the exhaust pipe on the other end of the main body of the front panel, and providing a baffle plate on the inner surface of the front panel from one end of the main body toward the other end of the main body, An air supply passage is formed by the air guide plate and the inner surface of the front panel, an exhaust pipe outlet is opened at a position facing the combustion air inlet of the air guide plate, and the exhaust pipe outlet and the combustion The exhaust pipe is inserted into the air intake port, and the air guide plate While opening the supply opening at a position facing the outlet port, and those in which a compressible gas-tight member over gap opening edge of said air inlet the air supply opening.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
It is a refrigerant heating device of an air conditioner that includes a combustion blower 21, a combustion section 20, a refrigerant heating heat exchanger 22, and an exhaust pipe 24 in order, and the front surface of the main body is covered with the upper front panel 17, wherein the combustion blower 21 is An inlet 30 is provided on one end side of the main body toward the front side of the main body, and the exhaust pipe 24 is provided on the other end side of the main body toward the front side of the main body. A pipe 24 communicates with the outside and has a larger opening than the exhaust pipe 24, opens a combustion air intake 32 for taking in combustion air from the periphery of the exhaust pipe 24, and opens one end of the main body on the inner surface of the upper front panel 17. A thin, flat box-shaped air guide plate 33 is provided from the side to the other end of the main body, and an air supply passage 34 is formed by the air guide plate 33 and the inner surface of the upper front panel 17. In front of the combustion air intake 32 on the side An exhaust pipe lead-out port 35 through which the exhaust pipe 24 passes is opened, the exhaust pipe 24 is inserted into the exhaust pipe lead-out port 35 and the combustion air intake port 32, and one end side of the main body of the air guide plate 33 is provided. In addition, the air supply opening 37 is opened at a position facing the air intake 30, and the gap between the air intake 30 and the air supply opening 37 has a thickness greater than the gap distance across the opening edge. By providing the compressible hermetic member 38 made of a functional sponge, it was compact and improved wind resistance.
[0009]
【Example】
Next, an embodiment of the present invention will be described with reference to the drawings.
1 is an indoor unit of an air conditioner, which is installed on an indoor wall or the like, and includes a fin tube type indoor heat exchanger 2 and a cross flow type indoor fan 3 inside, sucking indoor air and exchanging heat to indoors. By returning, the temperature of the indoor air is adjusted.
[0010]
4 is an outdoor unit installed outdoors and connected to the indoor unit 1 by a connecting pipe 5 penetrating the wall and the like. Inside, a four-way valve 7 for switching between the compressor 6 and the refrigeration circuit and a fin tube type outdoor heat are provided. A refrigeration circuit in which an exchanger 8 and a decompression device 9 such as a capillary tube are sequentially communicated with each other through a refrigerant pipe, a propeller-type outdoor fan 10, and a bypass circuit 11 provided in parallel with the outdoor heat exchanger 8 and the decompression device 9. The bypass circuit 11 includes a two-way valve 12 and a refrigerant heating device 13.
[0011]
This air conditioner with a refrigerant heating device is configured to cool indoors by discarding indoor heat absorbed by the indoor heat exchanger 2 to the outside with the outdoor heat exchanger 8, and by switching the four-way valve 7 to generate a refrigerant heater. 13, the compressor 6, the four-way valve 7, and the indoor heat exchanger 2 are sequentially communicated, and the refrigerant heated by the refrigerant heating device 13 is sent to the indoor heat exchanger 2 by the operation of the compressor 6 that is driven at a low speed. The heating operation is performed.
[0012]
Here, the outdoor unit 4 includes the lower front panel 14 covering the front surfaces of the compressor 6, the outdoor heat exchanger 8, the outdoor fan 10, and the like provided in the lower part, and an upper folded part 15 on the upper part. The attached heating device base 16 is provided, and the refrigerant heating device 13 is mounted and fixed on the heating device base 16.
[0013]
Furthermore, the periphery of the refrigerant heating device 13 is surrounded by a flat L-shaped upper front panel 17 and an upper rear panel 18, and the upper surface thereof is covered with a top plate 19. The panel 17, the upper back plate 18, and the top plate 19 serve as the main body casing of the outdoor unit 4.
[0014]
Here, the refrigerant heating device 13 includes a kerosene vaporization type combustion unit 20, a centrifugal type combustion blower 21 for supplying combustion air, a refrigerant pipe around the outer periphery, and combustion exhaust gas from the combustion unit 20 inside. A heat exchanger 22 for heating to exchange heat by passing through, a collective exhaust cylinder 23 for collecting the combustion exhaust gas after heat exchange, and an exhaust pipe 24 for exhausting the combustion exhaust gas from the collective exhaust cylinder 23 to the outside of the outdoor unit 4 The exhaust pipe 24 has a flange portion 25 in the straight pipe portion.
[0015]
26 is a pump for pumping kerosene from a kerosene tank (not shown) installed outside to the sub tank 27, 28 is an electromagnetic pump for supplying kerosene pumped into the sub tank 27 to the combustion unit 20, and 29 is a pump for the kerosene tank and the pump. This is an oil feeding pipe communicating with the pump 26.
[0016]
Here, the combustion blower 21 is positioned on one end side of the main body with the intake port 30 facing the front side of the main body, and the combustion air from the combustion blower 21 passes through the blower pipe 31 to the other end side of the main body. The combustion unit 20 is installed in a sideways direction, and the heating heat exchanger 22, the collective exhaust tube 23, and the exhaust pipe 24 are sequentially provided on the other end of the main body of the combustion unit 20. It is what it has.
[0017]
A combustion air intake port 32 which is circular and has a diameter larger than that of the exhaust pipe 24 is opened at the other end of the main body of the upper front panel 17, and upper, lower, left and right surfaces and a rear surface are formed on the inner surface of the upper front panel 17. A thin and flat box-shaped air guide plate 33 having a U-shaped cross section is attached so that one end of the main body is inclined upward, and combustion air from the combustion air intake port 32 is attached to the combustion blower 21 on one end of the main body. An air supply passage 34 is formed to lead to
[0018]
An exhaust pipe lead-out port 35 having the same diameter as the exhaust pipe 24 is opened coaxially with the combustion air intake port 32 on the other end side of the main body of the air guide plate 33, and the exhaust pipe 24 is connected to the exhaust pipe 24. Heat insulation made of an annular heat insulating material provided at the outlet 35 and the combustion air inlet 32 and formed at the opening edge of the exhaust pipe outlet 35 of the air guide plate 29 and the flange 25 of the exhaust pipe 24. The airtight member 36 is sandwiched to prevent leakage of the air supply, and heat transfer from the exhaust pipe 24 to the air guide plate 33 is interrupted to prevent the upper front panel 17 from becoming high temperature.
[0019]
In addition, an air supply opening 37 is opened at a position facing the intake port 30 of the combustion blower 21 on one end side of the main body of the air guide plate 33, and the air supply opening 37 is connected to the upper front panel 17 and the air guide. The outlet of the combustion air that has flowed through the air supply passage 34 between the plate 33 and the gap between the intake port 30 and the air supply opening 37 across the opening edge is greater than the gap distance A compressible air-tight member 38 made of a heat-resistant sponge having the above is provided, and the compressible air-tight member 38 is compressed and deformed and sandwiched to prevent leakage of supply air and inhalation of air released to the outside air in the outdoor unit 4. It is what.
[0020]
Below the air guide plate 33 inside the upper front panel 17, there are provided two mounting brackets 39 whose skirts are expanded inside the main body at appropriate positions in the width direction of the upper front panel 17. The upper front panel 17 is fixed by biting the folded portion 15 of the base 16. In addition, an inverted U-shaped notch 40 is provided below the side surface of the upper front panel 17 to serve as a hole for pulling out the oil feeding pipe 29 to the outside.
[0021]
Here, how to attach the upper front panel 17 will be described. First, the upper front panel 17 is pressed from the front of the main body so that the exhaust pipe 24 penetrates into the exhaust pipe outlet 35 and the combustion air intake 32, and the heat insulating airtight member 36 is formed by the flange portion 25 of the exhaust pipe 24 and the air guide plate 33. The airtightness of the exhaust pipe outlet 35 is maintained. At this time, one end of the main body of the upper front panel 17 is inclined upward. (Indicated by the dotted line in FIG. 5)
[0022]
Then, while pressing the upper front panel 17 against the back side, the exhaust pipe 24 is rotated clockwise around the rotation axis, the notch 40 is aligned with the oil feed pipe 29, and the upper part 15 of the heating device base 16 is moved upward. The mounting bracket 39 at the lower inner side of the front panel 17 is sequentially fitted and fixed.
[0023]
At this time, the compressible airtight member 38 is pressed and deformed by being pressed by the casing of the combustion blower 21 and the air guide plate 33, and between the intake port 30 and the air supply opening 37 when the upper front panel 17 is assembled. Even if a slight misalignment occurs, the compressible airtight member 38 absorbs the misalignment and does not require strict assembling, facilitating the assembling, and between the intake port 30 and the air supply opening 37. By simply attaching the upper front panel 17, a good airtight state can be easily obtained.
[0024]
Furthermore, since the opening of the exhaust pipe 24 and the combustion air intake 32 are provided at substantially the same position, the pressure balance between the supply air and the exhaust gas can be maintained even under strong winds, and the combustion Since the air supply path for the working air is formed in a form close to an airtight state, the air in the main casing is not sucked in. For example, even if strong air is blown in from the back side of the main casing by blowing back, The pressure balance between air supply and exhaust can be maintained without affecting the path, and stable combustion can be continued even when the blower pressure of the combustion blower 21 during weak combustion is weak.
[0025]
Further, the air supply passage 34 is formed by the upper front panel 17 and the air guide plate 33, and the air supply opening 37 on the one end side of the main body of the air guide plate 33 and the intake port 30 thereof are arranged facing the front side of the main body. The air blower 21 is connected to the air blower 21 by the compressible airtight member 38 and the exhaust pipe 24 is led out of the main body casing from the exhaust pipe outlet 35 on the other end side of the main body of the air guide plate 33. Each component of the refrigerant heating device 13 can be efficiently arranged to make the refrigerant heating device 13 small and thin. Further, the supply passage 34 includes the combustion section 20 and the heat exchanger 22 for heating. Since the combustion air entering from the combustion air intake port 32 is heated while passing through the air supply passage 34 and the air temperature becomes high, combustion is further stabilized. .
[0026]
Incidentally, 41 is an auxiliary air supply port provided as a front door of the upper front panel 17 in the middle of the air supply passage 34, and is located in the vicinity of the combustion air intake 32. As a result, when an exhaust top (not shown) that prevents a short circuit of combustion exhaust gas is attached to the exhaust pipe 24, it becomes difficult to supply air when a strong wind is blown from the front of the outdoor unit 4. In this case, air can be supplied from the auxiliary air supply port 41, and wind resistance from the front can be improved.
[0027]
The present invention is not limited to the above-described embodiment. In the present embodiment, the horizontal refrigerant heating apparatus is used, but a vertical refrigerant heating apparatus may be used.
[0028]
【The invention's effect】
As described above, according to the present invention, stable combustion can be continued while maintaining the pressure balance between the supply air and the exhaust gas, with little influence from the outside on the supply air path, and the conventional double tube structure. The refrigerant heating device of an air conditioner can be configured compactly without occupying a large space as in the case of a supply / exhaust cylinder, and a compressible airtight member even if a slight deviation occurs between the intake port and the supply air opening Absorbs misalignment, so that it can be easily assembled into a good airtight state.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a refrigeration circuit of an air conditioner according to an embodiment of the present invention.
FIG. 2 is a partially cutaway front view of an air conditioner according to an embodiment of the present invention.
FIG. 3 is a sectional view of the refrigerant heating device.
FIG. 4 is an explanatory view of the mounting bracket.
FIG. 5 is a perspective view for explaining assembly of the front panel.
[Explanation of symbols]
17 Upper front panel 21 Combustion blower 24 Exhaust pipe 30 Intake port 32 Combustion air passage intake 33 Air guide plate 34 Air supply passage 35 Exhaust pipe outlet 37 Air supply opening 38 Compressible airtight member

Claims (1)

A refrigerant heating device for an air conditioner having a combustion blower, a combustion section, a refrigerant heating heat exchanger, and an exhaust pipe in order, and the front of the main body covered with a front panel, wherein the combustion blower has an inlet on one end of the main body. A combustion air intake port provided toward the front side of the main body, the exhaust pipe being provided at the other end side of the main body toward the front side of the main body, and having an opening larger than the exhaust pipe at the other end side of the main body of the front panel. And an air guide plate is provided on the inner surface of the front panel from one end of the main body toward the other end of the main body, and an air supply passage is formed by the air guide plate and the inner surface of the front panel. An exhaust pipe outlet is opened at a position of the plate facing the combustion air inlet, the exhaust pipe is inserted into the exhaust pipe outlet and the combustion air inlet, and the air guide plate An air supply opening is opened at a position facing the air intake, and the air intake and the front The refrigerant heating apparatus of an air conditioner which is characterized in that a compressible gas-tight member over the opening edge into the gap between the air supply opening.

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