JP7079183B2 - Evaporator, air conditioner and environmental test equipment - Google Patents

Description

The present invention relates to an evaporator mounted on an environmental test apparatus or the like.

Environmental tests are known as a measure for investigating the performance and durability of products and parts. Environmental tests are carried out using equipment called environmental test equipment. The environmental test device artificially creates, for example, a high temperature environment, a low temperature environment, a high humidity environment, and the like.
The environmental test apparatus has, for example, the configuration shown in FIG. The environmental test device 100 shown in FIG. 5 includes a test room 3, a cooling means (refrigerator) 106, a heating heater 6, a humidifying device 7, and a blower 8. The test room 3 is a space covered with the heat insulating material 2. Then, there is an air passage 10 communicating with the test chamber 3, and the air passage 10 is provided with the evaporator 107 of the cooling means 106, the heating heater 6, the humidifying device 7, and the blower 8. Further, a temperature sensor 12 and a humidity sensor 13 are provided on the outlet side of the air passage 10.
In the environmental test device 100, the air conditioner 15 is configured by the member in the air passage 10 described above, the temperature sensor 12 and the humidity sensor 13.

The cooling means 106 is a refrigerator, which realizes a refrigerating cycle by using a phase-changing heat medium, and has a compressor 101, a condenser 102, and an expansion valve 103 in addition to the evaporator 107. The circuit 105 is provided.
The cooling means 106 evaporates the refrigerant, which is a heat medium, in the evaporator 107, lowers the surface temperature of the evaporator 107, and exchanges heat with the air passing through the air passage 10.

FIG. 6 shows a prior art evaporator 107. The evaporator 107 is a plate fin coil type heat exchanger, has a pair of end plates 22 and 23, and a large number of plate fins 25 are arranged between the end plates 22 and 23.
The evaporator 107 has a refrigerant flow path. The refrigerant flow path is a pipe connected in series to form a single flow path, and the pipe is arranged in a state of reciprocating between the pair of end plates 22 and 23 a plurality of times. The plate fin 25 has a plurality of openings, and the pipe constituting the refrigerant flow path passes through the opening of the plate fin 25 and is integrated with the plate fin 25.

In the evaporator 107, the end plate 22 on the front side of the drawing (hereinafter referred to as the front end plate 22) has a refrigerant introduction unit 33 and a refrigerant discharge unit 35. The refrigerant enters the evaporator 107 from the refrigerant introduction portion 33 provided on the front end plate 22 side, and proceeds toward the back end plate 23 (hereinafter referred to as the back end plate 23). The refrigerant changes its direction on the back side and returns to the front end plate 22 side. After that, the refrigerant reciprocates a plurality of times between the front end plate 22 side and the back end plate 23, and is discharged from the refrigerant discharge portion 35 provided on the front end plate 22.

The evaporator 107 is placed in the air passage 10, and air passes between the front end plate 22 and the back end plate 23. That is, the ventilation region 18 is formed between the front end plate 22 and the back end plate 23, and the air comes into contact with the plate fins 25 and exchanges heat with the air passing through the air passage 10.

Jitsukaihei 6-32971 Gazette

It is desirable that the temperature distribution of the air that has passed through the evaporator 107 is uniform, but in reality, it varies depending on the discharge location.
The refrigerant introduced into the evaporator 107 is a liquid phase or a gas-liquid mixed phase. The refrigerant evaporates in the evaporator 107 and takes away the heat of vaporization. Here, when the refrigerant in the evaporator 107 is a gas-liquid mixed phase, the surface temperature of the evaporator 107 is substantially constant. On the other hand, after the refrigerant undergoes a phase change to gas, the surface temperature of the evaporator 107 rises.
Therefore, the surface temperature of the evaporator 107 tends to be relatively high in the region close to the refrigerant discharge portion 35 as compared with the region close to the refrigerant introduction portion 33, and the temperature of the air depends on the location where the air is discharged through the evaporator 107. May vary.

The present applicant has proposed in Patent Document 1 a measure for eliminating temperature variation depending on the place where the air discharged from the evaporator is discharged.
The present invention further improves the configuration disclosed in Patent Document 1 and proposes a measure for further reducing the temperature variation depending on the place where the air discharged from the evaporator is discharged.

An embodiment for solving the above-mentioned problems is an evaporator that has a ventilation region and cools the air passing through the ventilation region, and has a refrigerant introduction section, a refrigerant discharge section, and a refrigerant flow path connecting the two. The refrigerant flow path has a plurality of straight pipe portions, the plurality of straight pipe portions are arranged in parallel across the ventilation region, and the ends of the straight pipe portions are in series with each other. A part of the heat pipe, which has a heat pipe in an evaporator which is connected to a heat pipe to form a series of flow paths and in which a refrigerant flowing through the refrigerant flow path reciprocates and reciprocates in the ventilation region two or more times. Is in the vicinity of the region on the refrigerant introduction portion side of the refrigerant flow path, and the other part or all of the heat pipe is in the vicinity of the region on the refrigerant discharge portion side of the refrigerant flow path. With the portion arranged on the refrigerant introduction portion side as the cold absorption side and the portion arranged on the refrigerant discharge portion side as the cooling side, the cold heat on the refrigerant introduction portion side is transferred to the refrigerant discharge portion side, and the heat is transferred to the refrigerant discharge portion side. Of the ventilation regions, when the region on the refrigerant introduction portion side from the center in the longitudinal direction of each straight pipe is the first half region and the opposite side is the second half region, at least a part of the cold absorption side of the heat pipe is The evaporator is located in the first half region and is characterized in that at least a part of the cooling side of the heat pipe is in the second half region.
A specific embodiment is an evaporator that has a ventilation region and cools air passing through the ventilation region, and has a refrigerant introduction section, a refrigerant discharge section, and a refrigerant flow path connecting the two, and the refrigerant flow. The road has a plurality of straight pipe portions, and the plurality of straight pipe portions are arranged in parallel across the ventilation region, and the ends of the straight pipe portions are connected in series to form a series. In an evaporator that forms the flow path of the above and allows the refrigerant flowing through the refrigerant flow path to reciprocate and reciprocate in the ventilation region two or more times, the evaporator has a heat pipe, and a part of the heat pipe is the refrigerant flow path. Is arranged in one of the plurality of straight pipe portions in the vicinity of the region on the refrigerant introduction portion side, and the other part of the heat pipe is in the region on the refrigerant discharge portion side of the refrigerant flow path. The heat pipe is arranged in another straight pipe portion of the plurality of straight pipe portions in the vicinity, and the heat pipe is any of the plurality of straight pipe portions other than the one straight pipe portion and the other straight pipe portion. A heat transfer between a portion arranged on the refrigerant introduction portion side and a portion arranged on the refrigerant discharge portion side without contacting the portion, and cooling the refrigerant discharge portion side by the cold heat of the refrigerant introduction portion side. When the region on the refrigerant introduction portion side from the center of each straight pipe in the longitudinal direction is the first half region and the opposite side is the second half region, the refrigerant introduction portion side of the heat pipe is defined as the ventilation region. The evaporator is characterized in that at least a part of the portion arranged in the first half region is in the first half region, and at least a part of the portion arranged on the refrigerant discharge portion side of the heat pipe is in the second half region.

This aspect is intended for an evaporator in which a refrigerant flowing through a refrigerant flow path reciprocates in a ventilation region two or more times. The target evaporator has a long refrigerant flow path, and in many cases, the temperature of the refrigerant differs between the start end and the end of the refrigerant flow path.
The “region on the refrigerant introduction portion side of the refrigerant flow path” is a region where the refrigerant is assumed to maintain the gas-liquid mixed state regardless of the magnitude of the cooling load. Although not limited, for example, a portion of one-fifth or less of the total length of the refrigerant flow path in the evaporator corresponds to the "region on the refrigerant introduction portion side of the refrigerant flow path" starting from the refrigerant introduction portion. Further, the portion of the first straight pipe into which the refrigerant is introduced is also a region where the refrigerant is assumed to maintain the gas-liquid mixed state, and corresponds to the “region on the refrigerant introduction portion side of the refrigerant flow path”.
On the other hand, "near the region on the refrigerant discharge portion side" is a region where the refrigerant is likely to be in a gas phase state. Although not limited, for example, a portion of 1/5 or less of the total length of the refrigerant flow path in the evaporator from the refrigerant discharge portion toward the refrigerant introduction portion corresponds to "near the region on the refrigerant discharge portion side". do. Further, the portion of the straight pipe through which the refrigerant passes last also corresponds to "near the region on the refrigerant discharge portion side".
A heat pipe is a member that efficiently transfers heat. Heat moves from the high side to the low side, but considering the concept of "cold heat", it can be said that "cold heat" moves in the opposite direction to heat.
Physically accurately expressing "heat transfer of cold heat on the refrigerant introduction portion side to the refrigerant discharge portion side" is "transferring heat on the refrigerant discharge portion side to the refrigerant introduction portion side".
In the evaporator of this embodiment, the cold heat on the refrigerant introduction portion side is transferred to the refrigerant discharge portion side by the heat pipe, so that the temperature in each portion of the refrigerant flow path becomes uniform. Furthermore, since at least a part of the cooling side of the heat pipe is in the first half region and at least a part of the cooling side of the heat pipe is in the second half region, the temperature of each part of the evaporator is also made uniform.
Therefore, the temperature distribution of the air that has passed through the evaporator of this embodiment is uniform at each passing location, and the variation is small.
Another aspect for solving the above-mentioned problems is an evaporator that has a ventilation region and cools the air passing through the ventilation region, and is a refrigerant that connects the refrigerant introduction section and the refrigerant discharge section. The refrigerant flow path has a plurality of straight pipe portions, and the plurality of straight pipe portions are arranged in parallel across the ventilation region, and the ends of the straight pipe portions are arranged with each other. Have a heat pipe in an evaporator in which the refrigerants are connected in series to form a series of flow paths, and the refrigerant flowing through the refrigerant flow path reciprocates and reciprocates in the ventilation region two or more times. A part of the heat pipe is in the vicinity of the region on the refrigerant introduction portion side of the refrigerant flow path, and the other part or all of the heat pipe is in the vicinity of the region on the refrigerant discharge portion side of the refrigerant flow path. The heat pipe transfers heat between a portion arranged on the refrigerant introduction portion side and a portion arranged on the refrigerant discharge portion side, and cools the refrigerant discharge portion side by the cold heat of the refrigerant introduction portion side. When the region on the refrigerant introduction portion side from the center of each straight pipe in the longitudinal direction is the first half region and the opposite side is the second half region, the heat pipe is arranged on the refrigerant introduction portion side. At least a part of the heat pipe is in the first half region, at least a part of the portion of the heat pipe arranged on the refrigerant discharge portion side is in the second half region, and a part of the heat pipe is the refrigerant flow. Arranged so as to be in direct contact with the straight pipe portion along the longitudinal direction of the straight pipe portion in the vicinity of the region on the refrigerant introduction portion side of the path, the other part or all of the heat pipe is the refrigerant flow path. It is an evaporator characterized in that it is arranged so as to be in direct contact with the straight pipe portion along the longitudinal direction of the straight pipe portion in the vicinity of the region on the refrigerant discharge portion side.

In the above aspect, it is desirable that there is a portion arranged in the middle portion of the heat pipe so as to bypass the ventilation region.
A specific embodiment is an evaporator that has a ventilation region and cools air passing through the ventilation region, and has a refrigerant introduction section, a refrigerant discharge section, and a refrigerant flow path connecting the two, and the refrigerant flow. The road has a plurality of straight pipe portions, and the plurality of straight pipe portions are arranged in parallel across the ventilation region, and the ends of the straight pipe portions are connected in series to form a series. In an evaporator that forms the flow path of the above and allows the refrigerant flowing through the refrigerant flow path to reciprocate and reciprocate in the ventilation region two or more times, the evaporator has a heat pipe, and a part of the heat pipe is the refrigerant flow path. The other part or all of the heat pipe is in the vicinity of the region on the refrigerant discharge portion side of the refrigerant flow path, and the heat pipe is in the vicinity of the refrigerant introduction portion. Heat is transferred between the portion arranged on the side and the portion arranged on the refrigerant discharge portion side, and the refrigerant discharge portion side is cooled by the cold heat on the refrigerant introduction portion side. When the region on the refrigerant introduction portion side from the center in the longitudinal direction of the straight pipe is the first half region and the opposite side is the second half region, at least a part of the portion of the heat pipe arranged on the refrigerant introduction portion side is said. At least a part of the portion of the heat pipe arranged on the refrigerant discharge portion side in the first half region is in the second half region, and there is a portion arranged in the middle portion of the heat pipe so as to bypass the ventilation region. It is an evaporator characterized by that.

Here, the "middle portion of the heat pipe" is a portion excluding both ends of the heat pipe.
According to this aspect, it is possible to manufacture an evaporator having a structure in which the refrigerant flow path is not congested by piping, and the air permeability in the ventilation region is ensured.

In the above embodiment, the plate fin has a pair of end plates and a plurality of plate fins, the plate fins are between the pair of end plates, the plate fins have a plurality of openings, and the straight pipe is the straight pipe. It is inserted through the opening and integrated with the plate fin, a part of the heat pipe is in the first half region and fixed to the plate fin, and an intermediate portion bypasses the outside of the other end plate. It is desirable that another part of the heat pipe is arranged in the latter half region and fixed to the plate fin.
A specific embodiment is an evaporator that has a ventilation region and cools air passing through the ventilation region, and has a refrigerant introduction section, a refrigerant discharge section, and a refrigerant flow path connecting the two, and the refrigerant flow. The road has a plurality of straight pipe portions, and the plurality of straight pipe portions are arranged in parallel across the ventilation region, and the ends of the straight pipe portions are connected in series to form a series. In an evaporator that forms the flow path of the above and allows the refrigerant flowing through the refrigerant flow path to reciprocate in and out of the ventilation region two or more times, the heater has a heat pipe, and a part of the heat pipe is the refrigerant flow path. The other part or all of the heat pipe is in the vicinity of the region on the refrigerant discharge portion side of the refrigerant flow path, and the heat pipe is located in the vicinity of the region on the refrigerant introduction portion side. Heat is transferred between the portion arranged on the side and the portion arranged on the refrigerant discharge portion side, and the refrigerant discharge portion side is cooled by the cold heat on the refrigerant introduction portion side. When the region on the refrigerant introduction portion side from the center in the longitudinal direction of the straight pipe is the first half region and the opposite side is the second half region, at least a part of the portion of the heat pipe arranged on the refrigerant introduction portion side is said. In the first half region, at least a part of the portion of the heat pipe arranged on the refrigerant discharge portion side is in the second half region, which has a pair of end plates and a plurality of plate fins, wherein the plate fins are said. Between the pair of end plates, the plate fins have a plurality of openings, the straight pipe is inserted through the openings and integrated with the plate fins, and a part of the heat pipe is in the first half region. The middle part bypasses the outside of the other end plate, and the other part of the heat pipe is arranged in the latter half region and fixed to the plate fin. It is an evaporator characterized by being present.

In this aspect, the heat pipe is connected to a straight pipe through which the refrigerant passes through the plate fins. In this embodiment, heat transfer is performed between the heat pipe and the straight pipe via the plate fins.
In the evaporator of this embodiment, the middle part of the heat pipe bypasses the outside of the end plate. Therefore, the ventilation area is not congested by the piping, and the ventilation of the ventilation area is ensured.

An aspect of the air conditioner is an air conditioner including a refrigerator and a blower, wherein the refrigerator includes a compressor, a condenser, an expansion means, and a circulation circuit having the evaporator. It is an air conditioner characterized in that a refrigerant circulates inside a circulation circuit to realize a refrigeration cycle.

An aspect of the environmental test apparatus is an environmental test apparatus including a test chamber for arranging a test object, the air conditioner, and adjusting the environment in the test chamber with the air conditioner.

The evaporator of the present invention has a small variation in the temperature of the air discharged from the evaporator depending on the discharge location. Therefore, the air conditioner equipped with the evaporator of the present invention has a small temperature variation of the discharged air. Further, in the environmental test apparatus equipped with the evaporator of the present invention, the temperature variation in the test chamber is small.

It is a perspective view of the evaporator of the embodiment of this invention, (a) is observed from the refrigerant introduction part side, (b) is observed from the back surface side. It is explanatory drawing explaining the position of the refrigerant passage and the heat pipe of the evaporator of FIG. It is a perspective view which shows the inside of the evaporator of FIG. 1, and shows the relationship between a refrigerant flow path, a heat pipe, and a plate fin. (A) is a graph showing the relationship between the distance of the refrigerant flow path of the prior art evaporator and the surface temperature of the refrigerant flow path, and (b) is the distance of the refrigerant flow path of the evaporator of the present embodiment and the refrigerant flow path. It is a graph which shows the relationship of the surface temperature of. It is a block diagram of the environmental test apparatus of this embodiment and the prior art. It is explanatory drawing explaining the ventilation state with respect to the evaporator of the prior art.

Hereinafter, embodiments of the present invention will be further described.
FIG. 1 is an evaporator 20 according to an embodiment of the present invention. The evaporator 20 is used as the evaporator 20 of the environmental test apparatus 1 shown in FIG.
The evaporator 20 of this embodiment is obtained by adding a heat pipe 50 to the evaporator 107 of the prior art. In each figure, the heat pipe 50 is a black-painted portion.

First, the parts common to the prior art will be described.
The evaporator 20 is a plate fin coil type evaporator similar to the evaporator 107 of the prior art, has a pair of end plates 22 and 23, and has a large number of plate fins 25 between the end plates 22 and 23. It is arranged. For the sake of drawing, in FIG. 1, the number of plate fins 25 is reduced.
In the present embodiment, the ventilation region 18 is formed between the pair of end plates 22 and 23, and the ventilation enters from the lower part of the drawing and exits to the upper side as shown by the arrow in FIG. 1A.

The evaporator 20 has a refrigerant flow path 26 as shown in FIG. The refrigerant flow path 26 is a pipeline that is connected in series as shown in FIG. 2 to form a single flow path, and is arranged in a state of reciprocating between the pair of end plates 22 and 23 a plurality of times. As shown in FIG. 3, the plate fin 25 has a plurality of openings 51, and the pipe (straight pipe 28) constituting the refrigerant flow path 26 is inserted into and integrated with the opening 51 of the plate fin 25.

The refrigerant flow path 26 is composed of a plurality of straight pipes 28 and a return vent 31.
The plurality of straight pipes 28 are supported by one end plate 22 and the other end plate 23. For convenience of explanation, one end plate 22 is referred to as a front end plate 22 and the other is referred to as a back end plate 23.
In this embodiment, a large number of straight pipes 28 are arranged in parallel and three-dimensionally between the pair of end plates 22 and 23.
In FIG. 2, the number of straight pipes 28 is reduced due to drawing, but the straight pipes 28 are arranged in a plurality of stages in the height direction, and a large number of straight pipes 28 are arranged in each stage. They are arranged in parallel.
Each straight pipe 28 is connected to the end of the adjacent straight pipe 28 by a return vent 31 at its end, and is connected in series as a whole, and one refrigerant flow path 26 is configured as described above. There is.

In the present embodiment, the uppermost stage, the end portion of the first straight pipe 28a at the left end of the drawing is open, and constitutes the refrigerant introduction portion 33.
Further, at the bottom, the end of the final straight pipe 28e at the left end of the drawing is open to form the refrigerant discharge portion 35.
As described above, the space between the refrigerant introduction unit 33 and the refrigerant discharge unit 35 is a single refrigerant flow path 26, which functions as a heat exchange unit of the evaporator 20.

In the evaporator 20 of the present embodiment, the front end plate 22 has a refrigerant introduction unit 33 and a refrigerant discharge unit 35.
The refrigerant is introduced from the refrigerant introduction portion 33 into the refrigerant flow path 26, and flows through the first straight pipe 28a from the front end plate 22 side toward the back end plate 23 side.
Then, the flow path is folded back on the end plate 23 side on the back side, flows to the second straight pipe 28b, and returns to the front end plate 22 side. In this way, in the evaporator 20, the refrigerant reciprocates through the ventilation region 18.

The evaporator 20 of the present embodiment is provided with a heat pipe 50 as a characteristic configuration. The heat pipe 50 is a sealed tube in which a working fluid is sealed. When a part of the heat pipe 50 becomes a high temperature state, the working fluid evaporates inside and takes away the heat of vaporization. The working fluid moves to the cold part, is condensed and returns to the liquid. Further, the liquefied working fluid passes through the wick and the like and returns to the high temperature portion. The heat pipe 50 repeats this process to transfer heat from the high temperature portion to the low temperature portion.
Conversely, the cold heat of the low temperature part is transferred to the high temperature part.

In the evaporator 20 of the present embodiment, as shown in FIG. 2, one end side of the heat pipe 50 is in the vicinity of the first straight pipe 28a which is the introduction portion of the refrigerant flow path 26, and the intermediate portion is outside the back end plate 23. Bypassing, the other end side of the heat pipe 50 is in the vicinity of the final straight pipe 28e.
In other words, one end side of the heat pipe 50 is at the start end of the region that contributes as a heat exchange portion, and the other end side of the heat pipe 50 is at the end portion of the heat exchange portion.
That is, in the evaporator 20 of the present embodiment, a part of the heat pipe 50 is in the vicinity of the region on the refrigerant introduction portion 33 side in the refrigerant flow path 26, and the other part of the heat pipe 50 is in the refrigerant flow path. It is in the vicinity of the region on the refrigerant discharge portion 35 side.

In the present embodiment, as shown in FIG. 3, the heat pipe 50 is inserted into and integrated with the opening 55 formed in the plate fin 25 in the same manner as the straight pipe 28 of the refrigerant flow path 26. Further, a part of the heat pipe 50 is in direct contact with the straight pipe 28.
However, the heat pipe 50 is only in contact with a part of the long refrigerant flow path 26, and the intermediate portion of the heat pipe 50 is outside the back end plate 23. Therefore, the volume of the heat pipe 50 in the ventilation region 18 of the evaporator 20 is small, the refrigerant flow path 26 between the end plates 22 and 23 is not congested, and the air permeability between the end plates 22 and 23 is ensured. To.

In the evaporator 20 of the present embodiment, in the heat pipe 50, the portion near the first straight pipe 28a of the heat pipe 50 functions as the cooling side, and the portion near the final straight pipe 28e functions as the cooling side. As a result, the cold heat in the vicinity of the first straight pipe 28a moves to cool the vicinity of the final straight pipe 28e, and the temperature variation due to the difference in the position of the refrigerant flow path 26 (distance from the refrigerant introduction portion 33) is reduced. ..
This principle will be described below.

FIG. 4A is a graph showing the relationship between the distance of the refrigerant flow path 26 of the prior art evaporator 107 and the surface temperature of the refrigerant flow path 26.
The refrigerant enters the refrigerant flow path 26 from the refrigerant introduction section 33 and is discharged from the refrigerant discharge section 35. The refrigerant introduced into the refrigerant introduction unit 33 is a liquid phase or a gas-liquid mixed phase, and takes heat from the surroundings by evaporating.
Therefore, the surface temperature of the refrigerant flow path 26 is low in the vicinity of the refrigerant introduction portion 33.
While the refrigerant flows through the refrigerant flow path 26, heat exchange proceeds on the surface of the evaporator 107. The refrigerant is a liquid phase or a gas-liquid mixed phase, but the proportion of the gas phase gradually increases.

When all the refrigerant is vaporized, the temperature of the refrigerant gradually rises. In many cases, the refrigerant is completely vaporized in the vicinity of the refrigerant discharge portion 35, and the surface temperature of the refrigerant flow path 26 in the vicinity of the refrigerant discharge portion 35 is higher than that in the vicinity of the refrigerant introduction portion 33.

In the evaporator 20 of the present embodiment, in the graph of FIG. 4A, a part of the heat pipe 50 is provided in the portion corresponding to the region 52 on the refrigerant introduction portion 33 side in the refrigerant flow path 26. .. Further, there is a part of the heat pipe 50 in the region 53 corresponding to the refrigerant discharge portion 35 side in the refrigerant flow path 26.
Therefore, the heat pipe 50 transfers cold heat from the region (low temperature region) 52 on the refrigerant introduction portion 33 side (low temperature region) 52 shown in the graph of FIG. 4A to the region (high temperature region) 53 on the refrigerant discharge portion 35 side, and FIG. As shown in the graph of (b), the temperature difference between the two is reduced.
To be precise, the heat of the region (high temperature region) 53 on the refrigerant discharge portion 35 side is transferred to the region (low temperature region) 52 on the refrigerant introduction portion 33 side, and the refrigerant is discharged as shown in the graph of FIG. 4 (b). The temperature on the side of the section 35 and the temperature on the side of the refrigerant introduction section 33 are smoothed.

In the present embodiment, on the cold absorption side (low temperature region), a part of the heat pipe 50 is arranged over substantially the entire length of the first straight pipe 28a which is the introduction portion of the refrigerant flow path 26.
That is, on the cold absorption side (low temperature region), the heat pipe 50 is arranged in a region including a region (first half region F) in the ventilation region 18 and close to the refrigerant introduction portion 33.
On the other hand, on the cooling side (high temperature region), since the heat pipe 50 is inserted into the ventilation region 18 from the back end plate 23, it is in the ventilation region 18 and far from the refrigerant introduction portion 33 (second half). It is arranged in the area including the area R).
Therefore, according to the evaporator 20 of the present embodiment, the temperature variation between the first half region F and the second half region R is small.
Therefore, the air that has passed through the evaporator 20 has little variation depending on the discharge location.

In the embodiment described above, a plate fin coil type condenser has been described as an example, but a type in which small fins are attached around a tube, a type in which fins are attached in a spiral shape, and a bare tube are used. The present invention can also be applied to things.

1 Environmental test equipment 15 Air conditioner 18 Ventilation area 20 Evaporator 22, 23 End plate 25 Plate fin 26 Refrigerant flow path 28 Straight pipe 33 Refrigerant introduction part 35 Refrigerant discharge part 50 Heat pipe 52 Refrigerant introduction part side area 53 Refrigerant discharge Area on the part side

Claims (6)

An evaporator that has a ventilation area and cools the air passing through the ventilation area.
It has a refrigerant introduction section, a refrigerant discharge section, and a refrigerant flow path connecting both.
The refrigerant flow path has a plurality of straight pipe portions, the plurality of straight pipe portions are arranged in parallel across the ventilation region, and the ends of the straight pipe portions are connected in series. In an evaporator that forms a series of flow paths and the refrigerant flowing through the refrigerant flow path reciprocates and reciprocates in the ventilation region two or more times.
It has a heat pipe, a part of the heat pipe is in the vicinity of the region on the refrigerant introduction portion side of the refrigerant flow path, and the other part or all of the heat pipe is the refrigerant discharge of the refrigerant flow path. It is near the area on the part side and
The heat pipe transfers heat between a portion arranged on the refrigerant introduction portion side and a portion arranged on the refrigerant discharge portion side, and cools the refrigerant discharge portion side by the cold heat of the refrigerant introduction portion side. ,
Among the ventilation regions, when the region on the refrigerant introduction portion side from the center in the longitudinal direction of each straight pipe is the first half region and the opposite side is the second half region, the heat pipe is arranged on the refrigerant introduction portion side. At least a part of the portion is in the first half region, and at least a part of the portion of the heat pipe arranged on the refrigerant discharge portion side is in the second half region.
A part of the heat pipe is arranged so as to be in direct contact with the straight pipe portion along the longitudinal direction of the straight pipe portion in the vicinity of the region of the refrigerant flow path on the refrigerant introduction portion side. The other part or all of the refrigerant flow path is arranged so as to be in direct contact with the straight pipe portion along the longitudinal direction of the straight pipe portion in the vicinity of the region on the refrigerant discharge portion side of the refrigerant flow path. Evaporator . An evaporator that has a ventilation area and cools the air passing through the ventilation area.
It has a refrigerant introduction section, a refrigerant discharge section, and a refrigerant flow path connecting both.
The refrigerant flow path has a plurality of straight pipe portions, the plurality of straight pipe portions are arranged in parallel across the ventilation region, and the ends of the straight pipe portions are connected in series. In an evaporator that forms a series of flow paths and the refrigerant flowing through the refrigerant flow path reciprocates and reciprocates in the ventilation region two or more times.
It has a heat pipe, a part of the heat pipe is in the vicinity of the region on the refrigerant introduction portion side of the refrigerant flow path, and the other part or all of the heat pipe is the refrigerant discharge of the refrigerant flow path. It is near the area on the part side and
The heat pipe transfers heat between a portion arranged on the refrigerant introduction portion side and a portion arranged on the refrigerant discharge portion side, and cools the refrigerant discharge portion side by the cold heat of the refrigerant introduction portion side. ,
Among the ventilation regions, when the region on the refrigerant introduction portion side from the center in the longitudinal direction of each straight pipe is the first half region and the opposite side is the second half region, the heat pipe is arranged on the refrigerant introduction portion side. At least a part of the portion is in the first half region, and at least a part of the portion of the heat pipe arranged on the refrigerant discharge portion side is in the second half region.
An evaporator characterized in that there is a portion arranged in the middle portion of the heat pipe so as to bypass the ventilation region. An evaporator that has a ventilation area and cools the air passing through the ventilation area.
It has a refrigerant introduction section, a refrigerant discharge section, and a refrigerant flow path connecting both.
The refrigerant flow path has a plurality of straight pipe portions, the plurality of straight pipe portions are arranged in parallel across the ventilation region, and the ends of the straight pipe portions are connected in series. In an evaporator that forms a series of flow paths and the refrigerant flowing through the refrigerant flow path reciprocates and reciprocates in the ventilation region two or more times.
It has a heat pipe, a part of the heat pipe is in the vicinity of the region on the refrigerant introduction portion side of the refrigerant flow path, and the other part or all of the heat pipe is the refrigerant discharge of the refrigerant flow path. It is near the area on the part side and
The heat pipe transfers heat between a portion arranged on the refrigerant introduction portion side and a portion arranged on the refrigerant discharge portion side, and cools the refrigerant discharge portion side by the cold heat of the refrigerant introduction portion side. ,
Among the ventilation regions, when the region on the refrigerant introduction portion side from the center in the longitudinal direction of each straight pipe is the first half region and the opposite side is the second half region, the heat pipe is arranged on the refrigerant introduction portion side. At least a part of the portion is in the first half region, and at least a part of the portion of the heat pipe arranged on the refrigerant discharge portion side is in the second half region.
It has a pair of end plates and a plurality of plate fins, the plate fins are between the pair of end plates, the plate fins have a plurality of openings, and the straight pipe is inserted through the openings. It is integrated with the plate fin and
A part of the heat pipe is in the first half region and is fixed to the plate fin, an intermediate part bypasses the outside of the other end plate, and another part of the heat pipe is arranged in the second half region. An evaporator characterized in that it is fixed to the plate fins. An evaporator that has a ventilation area and cools the air passing through the ventilation area.
It has a refrigerant introduction section, a refrigerant discharge section, and a refrigerant flow path connecting both.
The refrigerant flow path has a plurality of straight pipe portions, the plurality of straight pipe portions are arranged in parallel across the ventilation region, and the ends of the straight pipe portions are connected in series. In an evaporator that forms a series of flow paths and the refrigerant flowing through the refrigerant flow path reciprocates and reciprocates in the ventilation region two or more times.
It has a heat pipe, and a part of the heat pipe is arranged in one of the plurality of straight pipe portions in the vicinity of the region on the refrigerant introduction portion side of the refrigerant flow path, and the heat pipe has a heat pipe. The other part is arranged in another straight pipe portion of the plurality of straight pipe portions in the vicinity of the region on the refrigerant discharge portion side of the refrigerant flow path.
The heat pipe does not come into contact with any of the plurality of straight pipe portions other than the one straight pipe portion and the other straight pipe portion, and the portion arranged on the refrigerant introduction portion side and the refrigerant discharge portion. Heat is transferred to the portion arranged on the side, and the refrigerant discharge portion side is cooled by the cold heat of the refrigerant introduction portion side.
Of the ventilation regions, when the region on the refrigerant introduction portion side from the center in the longitudinal direction of each straight pipe is the first half region and the opposite side is the second half region, the heat pipe is arranged on the refrigerant introduction portion side. An evaporator characterized in that at least a part of the portion is in the first half region, and at least a part of the portion of the heat pipe arranged on the refrigerant discharge portion side is in the second half region. In an air conditioner equipped with a refrigerator and a blower,
The refrigerator includes a compressor, a condenser, an expansion means, and a circulation circuit having the evaporator according to any one of claims 1 to 4, and the refrigerant circulates inside the circulation circuit. An air conditioner characterized by realizing a refrigeration cycle. An environmental test apparatus comprising a test chamber for arranging a test object and the air conditioner according to claim 5, wherein the air conditioner adjusts the environment in the test chamber.

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