JPS632785Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat exchanger used in a vehicle air conditioner or the like.

Generally, in a vehicle's air conditioner, outside air or conditioned air from a cooler's evaporator is heated by a heat exchanger, and the heated air is mixed with unheated air to adjust the temperature to an appropriate temperature before being sent into the vehicle interior. However, conventional heat exchangers have a water tank at both ends, which are connected by welding or the like using multiple tubes, and then heat dissipation fins are connected between the tubes by welding or the like. Because of the large number of joints, manufacturing is not only complicated, but also there are many points where water is likely to leak, and the large-capacity water tank increases the overall weight.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat exchanger that is light and compact, less likely to cause water leakage, and has a simple structure that can accurately control the temperature of air.

In order to achieve the above object, the present invention crushes a hollow pipe material into a flat shape leaving both ends, bends the flat part in a serpentine shape, and constructs a heat pipe. Warm air passages and ventilation passages are formed in layers alternately in a plurality of gaps between the facing flat parts, and only the warm air passages are provided with heat dissipation fins bent in a corrugated shape. The heat pipe is characterized in that an adjustment member capable of adjusting the opening area is provided adjacent to the heat pipe.

A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Unit case 1 installed inside the front of the vehicle body
An air intake chamber 3 with an air intake port 2 opened is formed in the front part of the , and the air intake chamber 3 is filled with outside air, which is force-fed through the air intake port 2 by a blower (not shown), or air from a cooler. Conditioned air from the evaporator is introduced.

A mixing chamber 4 for high-temperature air and low-temperature air is formed at the rear of the unit case 1, and a short cylindrical distribution chamber 5 communicating with the mixing chamber 4 is connected to the rear thereof.

Inside the unit case 1, a rectangular heat exchanger H that is long in the vertical direction is provided so as to block the air intake chamber 3 and the mixing chamber 4. A slide damper 6 as an adjustment member is provided along the slide damper 6, which is slidable along the slide damper 6 as an adjustment member.

Next, the structure of the heat exchanger H will be explained mainly with reference to FIG. 2. After crushing a pipe material such as iron into a flat shape leaving both ends intact, it is bent vertically in a meandering manner. This heat pipe 7 has an inlet 8 at its lower end and an outlet 9 at its upper end, and these ports 8 and 9 are connected to a cooling water circuit of a vehicle engine (not shown). It's becoming like that. In the plurality of gaps defined by the facing flat parts 7a of the meandering heat pipe 7, there are a plurality of hot air passages 10 ₁ to 10 ₄ and ventilation passages that communicate the air intake chamber 3 and the mixing chamber 4. 11 ₁ ~
11 ₃ are formed in alternating layers above and below,
Among the passages 10 ₁ to 10 ₄ ; 11 ₁ to 11 ₃ , only the hot air passages 10 ₁ to 10 ₄ are provided with heat dissipation fins 12 ₁ to 12 ₄ bent upward and downward in a corrugated shape, respectively. The heat dissipation fins 12 ₁ to 12 ₄ are formed such that the pitch intervals thereof gradually narrow from the upper to the lower.

The slide damper 6 installed adjacent to the front side of the heat pipe 7 can be slid up and down manually, etc., and has a plurality of elongated circulation holes 14 formed in the horizontal direction at intervals in the vertical direction.
By adjusting its vertical movement, the heating passage 10 ₁
~10 ₄ and ventilation passages 11 ₁ to 11 ₃ by variably adjusting the opening area on the air intake chamber 3 side.
₁ to 10 ₄ , 11 ₁ to 11 ₃ The ratio of the flow rate of high temperature air and low temperature air passing through these passages 10 ₁ to 10 ₄ , 11 ₁ can be adjusted.
The temperature of the mixed air after passing through ₁₁₃ can be accurately controlled over a relatively wide temperature range.

In addition, the flow holes 14 and 1 on the front surface of the slide damper 6
Guides 13, . . . having a triangular cross section that taper toward the air intake chamber 3 are integrally provided on the front surface of the air intake chamber 4.

The cylindrical distribution chamber 5 at the rear of the mixing chamber 4 includes an upper part,
Each lateral and downward outlet 15, 16 and 17 is opened. Although not shown, the upper outlet 15 is
It communicates with the air outlet of the defroster, and the side outlet 1
6 communicates with an air outlet toward the vicinity of the passenger's head in the upper part of the vehicle interior, and a lower outlet 17 communicates with an air outlet toward the vicinity of the occupant's feet.

A rotary damper 18 that is operated manually or the like is provided in the mixing chamber 4, and this rotary damper 18 is connected to the upper, side, and lower outlets 15, 16.
and adjust the opening degree of 17.

Next, the operation of the first embodiment of the present invention shown in FIGS. 1 and 2 will be explained.

When the vehicle is currently running, compressed air from the blower or conditioned air from the evaporator in the case of a vehicle equipped with a cooler flows into the air intake chamber 3. on the other hand,
Heated water from the engine cooling circuit circulates within the heat pipe 7 and the heat radiation fin 12.
Heat ₁ to 12 ₄ . The air in the air intake chamber 3 is heated as it passes through the hot air passages 10 ₁ to 10 ₄ and the ventilation passages _{11 1} to _{11 3 of} the heat exchanger H; Passage 1
The air passing through the ventilation passages _{11 1} to 11 ₃ is heated to a high temperature, whereas the air passing through the ventilation passages 11 ₁ to 11 ₃ is only slightly heated. Therefore, high-temperature air and low-temperature air flow into the mixing chamber 4 in multiple layers, so that mixing thereof is performed quickly and easily.

In addition, the heated water flowing from the bottom to the top inside the heat pipe 7 gradually loses heat and its temperature decreases, and the heat dissipation fins 12 ₁ to 12 ₄ of the hot air passages 10 ₁ to 10 ₄ become coarser and coarser as they go from upper to lower. Because it will be crowded,
The air passing through the warm air passages 10 ₁ to 10 ₄ is gradually heated to a high temperature as it goes from the top to the bottom. Therefore, the temperature of the incoming air in the mixing chamber 4 gradually increases from the upper level to the lower level. As a result, it is easy to mix and harmonize the air even in the mixing chamber 4, which has a relatively small capacity as a whole, and the heated air in the upper part of the mixing chamber 4 (lower in temperature than the air in the lower part of the mixing chamber 4) is heated through the side outlet 16.
The heated air in the lower part of the mixing chamber 4 (which has a higher temperature than the air in the upper part of the mixing chamber 4) is blown out from the lower outlet 17 toward the vicinity of the occupant's feet in the passenger compartment. It can be blown towards the head and achieve the effect of "cold head and warm feet".

Note that the heated air from the upper outlet 15 is guided to the defroster.

By adjusting the slide damper 6 up and down, the opening areas of the hot air passages 10 ₁ to 10 ₄ and the ventilation passages 11 ₁ to 11 ₃ facing the air intake port 2 are variably adjusted, and the air heating temperature by the heat exchanger H is adjusted. Furthermore, by adjusting the rotation of the rotary damper 18, the ratio of the amount of heated air flowing out to the side and lower outlets 16, 17 can be variably adjusted.

FIG. 3 shows a second embodiment of the invention. In this embodiment, instead of changing the pitch interval of the corrugated heat radiation fins 12 ₁ to 12 ₄ provided in each of the hot air passages 10 ₁ to 10 ₄ , the passage width of the hot air passages 10 ₁ to 10 ₄ is changed. That is, the vertical passage widths of the hot air passages 10 ₁ to 10 ₄ from the upper row to the lower row of warm air passages 10 ₁ to 10 ₄ are gradually narrowed. Therefore, as it goes from the upper hot air passage 10 ₁ to the lower hot air passage 10 ₄ , the air flowing therethrough is gradually heated to a high temperature, and the same effect as in the first embodiment can be obtained.

As described above, according to the present invention, the heat pipe 7 is constructed by crushing a hollow pipe material into a flat shape, leaving both ends intact, and bending the flat part 7a in a meandering manner. Opposite flat parts 7
Hot air passages 10 ₁ in the plurality of gaps formed between a.
10 ₄ and ventilation passages 11 ₁ to 11 ₃ are formed alternately in layers, and the hot air passages 10 ₁ to 10 ₄ are provided with heat radiation fins 12 ₁ to 12 ₄ bent in a corrugated shape. Compared to conventional heat exchangers, which are constructed by joining a tank, multiple tubes, and heat dissipation fins by welding, etc., the number of joints by welding, etc. is reduced as much as possible, making manufacturing easier and reducing water flow. Concerns about leakage are greatly reduced. Furthermore, since there is no water tank part with a relatively large capacity as in conventional models, the entire structure can be made smaller and lighter.

Moreover, the heat radiation fins 12 ₁ to 12 ₄ are in the hot air passage 10 ₁
10 ₄ and ventilation passages 11 ₁ to 11 ₃ , only the warm air passages 10 ₁ to 10 ₄ are provided, and the ventilation passages 11
Since the ventilation passages ₁ to 11 ₃ are not provided, the ventilation passages 11
₁ to 11 ₃ are simple in structure and can contribute to reducing the passage resistance.

Further, since an adjustment member 6 that can adjust the opening area of the ventilation passages 11 ₁ to 11 ₃ is provided adjacent to the heat pipe 7, air that is lower temperature than the high temperature air flowing through the hot air passages 10 ₁ to 10 ₄ flows. By only slightly adjusting the degree of restriction of the ventilation passages 11 ₁ to 11 ₃ using the adjustment member 6, both passages 10 ₁ to 11 3 can be closed.
10 ₄ ; The temperature of the mixed air after passing through 11 ₁ to 11 ₃ can be accurately adjusted over a relatively wide temperature range. Moreover, the hot aisle 10 ₁ to _{10 4}
and the ventilation passages 11 ₁ to 11 ₃ are formed alternately in layers, so that the passages 10 ₁ to 10 ₄ ; 11 ₁
The mixing of the high-temperature air and low-temperature air after passing through the hot air passages 10 ₁ and 10 ₃ is easily and quickly carried out.
10 ₄ and ventilation passages 11 ₁ to 11 ₃ are provided together, the temperature distribution of the mixed air can be made smooth. Moreover, since the ventilation passages 11 ₁ to 1 ₃ are layered and have narrow passage widths, the adjustment stroke of the adjustment member 6 that adjusts the area of the passages can be shortened, and the adjustment operation can be performed quickly. can be made smaller.

[Brief explanation of drawings]

1 and 2 show a first embodiment of the heat exchanger of the present invention, FIG. 1 is a vertical perspective view of an air conditioner equipped with the heat exchanger, FIG. 2 is a perspective view of the heat exchanger,
FIG. 3 is a perspective view of a second embodiment of the heat exchanger of the present invention. 6... Slide damper as an adjustment member, 7...
...Heat pipe, 7a...Flat part, 10 ₁ to 10 ₄
...Hot air passage, 11 ₁ to 11 ₃ ...Vent passage, 12
₁ to 12 ₄ ... Heat dissipation fin.

Claims (1)

[Scope of utility model registration request] The heat pipe 7 is constructed by crushing a hollow pipe material into a flat shape, leaving both ends intact, and bending the flat part 7a in a meandering manner. Warm air passages 10 ₁ to 10 ₄ and ventilation passages 11 ₁ to 11 ₃ are formed alternately in layers in the gaps, and these passages 10 ₁ to 10 ₄ ;
Only in hot aisles 10 ₁ to 10 ₄ among _{1 1} to 11 ₃ ,
Heat radiation fins 12 ₁ to 12 ₄ bent in a corrugated shape
, and an adjustment member 6 that can adjust the opening area of the ventilation passages 11 ₁ to 11 ₃ is provided adjacent to the heat pipe 7.