JP2010175171A - Temperature control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature control device capable of achieving reduction in the size of the device configuration by eliminating the necessity of a drainage facility for discharging drain water W generated from an evaporator, improving cooling efficiency of a refrigerant of a condenser, that is recovery efficiency of cold heat, and improving condensation efficiency of a refrigerant. <P>SOLUTION: The temperature control device includes a refrigerating cycle in which a compressor 2, the air-cooling type condenser 3, an expansion part 4 and the evaporator 5 are arranged in this order, and the temperature of a temperature control target space 30 is controlled by using temperature control target air cooled by heat exchange between the refrigerant and the temperature control target air by the evaporator 5. The condenser 3 is arranged below the evaporator 5, and a drain pan 10 for storing the drain water W generated by dew formation on the evaporator 5 and making the drain water W drop down to the condenser 3 is arranged between the evaporator 5 and the condenser 3. A water absorbing body 13 absorbing the drain water W made to drop down from the drain pan 10 and having ventilating performance is provided on the air side of the condenser 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention includes a refrigeration cycle in which a compressor, a condenser, an expansion unit, and an evaporator are provided in the order described, and the temperature adjustment target space is heated using the temperature adjustment target air cooled by the evaporator. The present invention relates to a temperature adjusting device to be adjusted.

  As a temperature adjusting device using the refrigeration cycle, a compressor that compresses refrigerant, an air-cooled condenser that condenses the refrigerant compressed by the compressor, and a refrigerant that has been condensed by the condenser are expanded. An refrigeration cycle provided with an expansion section and an evaporator for evaporating the refrigerant after being expanded in the expansion section in the order described, and the temperature cooled by heat exchange between the refrigerant and the temperature-controlled air in the evaporator There is a cooling device that cools the space to be cooled using the adjustment target air (see, for example, Patent Document 1).

  In the above-described temperature adjusting device, for example, the cooling device described in Patent Document 1, water (drain water) is generated by condensation on the surface of the evaporator that cools the temperature adjustment target air as the cooling device is operated. Must be processed in some way. Therefore, in the cooling device described in Patent Document 1, the drain water generated from the evaporator is temporarily stored in the drain pan, and the condenser cooling air for cooling the condenser flows in the condenser. A porous water-absorbing body is provided on the downstream side of the water, and drain water is dropped into the water-absorbing body to absorb water. And the structure which evaporates this absorbed drain water with the air for condenser cooling after passing a condenser in the said water absorption body is employ | adopted.

  Thereby, in the cooling device described in Patent Document 1, it is not necessary to provide an electric heater for evaporating the drain water, and power consumption can be reduced, and the relatively warm condenser cooling air after passing through the condenser can be reduced. It is said that drain heat can be evaporated by supplying it to the water absorption body and the exhaust heat can be used effectively.

JP 2007-327666 A

  However, in the cooling device described in Patent Document 1, the water absorption body for absorbing the condenser and drain water into the casing constituting the cooling device is provided downstream from the upstream side through which the condenser cooling air flows. Therefore, there is a problem that a relatively large space is required and the size of the cooling device is increased.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a temperature adjusting device that can realize downsizing of the device configuration without requiring a drainage facility for draining drain water generated from an evaporator. It is in.

In order to achieve the above object, a temperature control device according to the present invention includes a compressor that compresses a refrigerant, an air-cooled condenser that condenses the refrigerant compressed by the compressor, and a condenser that is condensed by the condenser. And an evaporator for evaporating the refrigerant after being expanded in the expansion unit in the order of description. The refrigerant and the temperature-controlled air in the evaporator A temperature adjustment device that adjusts the temperature of the temperature adjustment target space using the temperature adjustment target air cooled by heat exchange with
The condenser is disposed below the evaporator;
A drain pan is provided between the evaporator and the condenser for storing drain water generated by condensation of the evaporator and dropping the drain water onto the condenser.
The air side of the condenser is provided with a water absorbing body having air permeability that absorbs drain water dropped from the drain pan.

According to the above characteristic configuration, the drain water generated by the condensation of the evaporator accompanying the operation of the temperature adjusting device is stored in the drain pan disposed below the evaporator, and then disposed below the evaporator and the drain pan. Drip directly into the condenser. And since the drain water dripped at the condenser is absorbed by the water absorption body provided on the air side of the condenser and the descending speed is lowered, it is relatively long with the condenser cooling air passing through the air-cooled condenser. Evaporation is promoted by contact for a long time. As a result, in the condenser, the refrigerant can be cooled not only by heat exchange with the air for cooling the condenser but also by heat exchange by the latent heat of evaporation of the drain water, thereby improving the cooling efficiency of the condenser, that is, the recovery efficiency of the cold heat. Thus, the refrigerant condensing efficiency can be improved.
Further, since the drain water evaporates on the air side of the condenser and is discharged together with the condenser cooling air, it is not necessary to provide a drainage facility for draining the drain water, and the water absorption body can be disposed in the condenser. Therefore, the downsizing of the device configuration of the temperature adjusting device can be realized.

  A further characteristic configuration of the temperature adjusting device according to the present invention includes a heat transfer plate in which the air-cooled condenser is disposed in parallel with a flow direction of condenser cooling air for cooling the refrigerant. It is comprised and the said water absorption body exists in the point provided between the adjacent of the several heat exchanger plate arrange | positioned in parallel.

  According to the above characteristic configuration, the plurality of heat transfer plates are arranged in parallel with the flow direction of the condenser cooling air flowing through the condenser, and air permeability is provided between the adjacent heat transfer plates. Since the water absorber provided is provided, the flow of the condenser cooling air in the condenser is not hindered by the water absorber, and is dropped from the condenser cooling air and the drain pan passing through the water absorber. Cooling of the refrigerant by the condenser cooling air and the drain water can be promoted while maintaining a reliable contact with the drain water absorbed by the water absorbing body. In particular, since the water absorber is disposed longer in the direction of the drain water descending, the drain water can be retained in the water absorber longer, and the contact between the condenser cooling air and the drain water is more reliable. However, the cooling of the refrigerant by the condenser cooling air and the drain water can be further promoted. Thereby, evaporation of drain water can be promoted, the cooling efficiency of the condenser, that is, the recovery efficiency of the cold heat can be improved, and the condensation efficiency of the refrigerant can be improved.

  The temperature control apparatus according to the present invention is further characterized in that the condenser is composed of a plurality of condensers divided in the vertical direction, and the water absorber is provided in at least the upper condenser into which the high-temperature refrigerant flows. It is in the point.

  According to the above characteristic configuration, the condenser is divided into a plurality of parts in the vertical direction, and at least the upper condenser into which the high-temperature refrigerant flows is provided with the water absorber. The drain water absorbed by the water absorber of the condenser can be evaporated more efficiently. Therefore, it is possible to cool the refrigerant and evaporate the drain water more efficiently, further improve the cooling efficiency of the condenser, that is, the recovery efficiency of the cold heat, and further improve the condensation efficiency of the refrigerant.

  The temperature control apparatus according to the present invention is further characterized in that the drain water that has passed through the upper condenser can be stored in the lower part of the upper condenser, and the upper condenser and the lower condensation are stored. It is in the point which provided the partition plate divided into a vessel.

  According to the above characteristic configuration, since the partition plate for storing the drain water that has passed through the upper condenser is provided at the lower part of the upper condenser divided into a plurality of parts, the partition plate further lowers the drain water. Is prevented, and the drain water can be maintained in a state of being absorbed by the water absorber of the upper condenser. Thereby, drain water can be hold | maintained at the upper condenser into which a comparatively high-temperature refrigerant | coolant flows in, and cooling of a refrigerant | coolant and evaporation of drain water can be performed still more efficiently.

A further characteristic configuration of the temperature adjusting device according to the present invention includes a heat transfer plate in which the air-cooled condenser is disposed in parallel with a flow direction of condenser cooling air for cooling the refrigerant. Configured,
The said water absorption body exists in the point provided in the outer peripheral part of the piping of the said refrigerant | coolant which flows through the said condenser.

  According to the above characteristic configuration, the plurality of heat transfer plates are arranged in parallel with the flow direction of the condenser cooling air flowing through the condenser, and the outer peripheral portion of the refrigerant pipe flowing through the condenser Since the water-absorbing body having air permeability is provided in the condenser, the condenser cooling air and the drain pan that pass through the condenser are not obstructed by the water-absorbing body. The cooling of the refrigerant by the condenser cooling air and the drain water can be promoted while maintaining a reliable contact with the drain water dripped from the water absorbent. In particular, since the water absorbing body is provided close to the refrigerant pipe, cooling of the refrigerant by the drain water absorbed by the water absorbing body can be further promoted. Thereby, evaporation of drain water can be promoted, the cooling efficiency of the condenser, that is, the recovery efficiency of the cold heat can be improved, and the condensation efficiency of the refrigerant can be improved.

Diagram showing schematic configuration of temperature control device The figure which shows schematic structure of an evaporator and a condenser The figure which shows schematic internal structure of the upper condenser provided with the porous board The figure which shows schematic internal structure of the lower condenser which is not provided with the porous board Sectional drawing which shows schematic structure of the heat exchanger tube which concerns on another embodiment

Hereinafter, an embodiment of a temperature control device according to the present invention will be described.
1 is a diagram showing a schematic configuration of a temperature control device, FIG. 2 is a diagram showing a schematic configuration of an evaporator and a condenser according to the present application, and FIG. 3 is a schematic diagram of an upper condenser provided with a porous plate. FIG. 4 is a diagram showing an internal configuration, and FIG. 4 is a diagram showing a schematic internal configuration of a lower condenser not provided with a porous plate.

First, a basic configuration of the temperature adjustment device will be described.
As shown in FIG. 1, the temperature adjustment device includes a circulation path 1 through which the refrigerant circulates. In the middle of the circulation path 1, the temperature adjusting device is condensed by the compressor 2 that compresses the evaporated refrigerant, the air-cooled condenser 3 that condenses the refrigerant compressed by the compressor 2, and the condenser 3. The expansion valve 4 (an example of the expansion unit) that expands the refrigerant after the evaporation, the refrigerant after being expanded by the expansion valve 4 is evaporated, and heat is exchanged between the intake air (an example of temperature control target air) and the refrigerant. An evaporator 5 for cooling the intake air is provided with a refrigeration cycle provided in the order of description.

Further, the temperature adjusting device heats the cooling air (an example of the temperature adjustment target air) cooled in the evaporator 5 and uses it as the blown air (an example of the temperature adjustment target air) (an example of the heating means). ) And an evaporator fan 7 that creates a flow of temperature adjustment target air to be discharged from the temperature adjustment device to the temperature adjustment target space 30 as blown air after passing through the evaporator 5 and the heater 6. Condensation for sucking intake air for the condenser (an example of cooling air for the condenser) and exhausting it as the exhaust air for the condenser (an example of cooling air for the condenser) after passing through the condenser 3 And a condenser fan 8 for producing a flow of condenser cooling air. In addition, as shown in FIG.3 and FIG.4, the flow direction (flow direction) of this condenser cooling air is illustrated as the X direction.
Further, as shown in FIG. 1, the temperature adjusting device includes a temperature sensor 14 provided between the evaporator 5 and the heater 6, and a temperature sensor 15 provided on the downstream side of the heater 6 and the evaporator fan 7. Control means 9 is provided for controlling the operation of each device of the temperature control target device so that the temperature of the blown air discharged into the temperature control target space 30 becomes the target blow temperature using the detected temperature information.

  Next, as shown in FIGS. 1 and 2, the temperature control device according to the present invention stores water (drain water W) generated by condensation on the surface of the evaporator 5 and condenses the drain water W. 3 is provided with a drain pan 10 to be dropped. As will be described later, the drain pan 10 is disposed below the evaporator 5 and above the condenser 3, that is, between the evaporator 5 and the condenser 3. The drain pan 10 includes a water collecting portion 10a that collects the drain water W generated in the evaporator 5, and a storage portion 10b that stores the drain water W collected in the water collecting portion 10a. The drain water W is configured to be able to be dripped (sprinkled) uniformly over the upper portion of the condenser 3 from a plurality of through holes provided in the lower portion of 10b.

As shown in FIGS. 2 to 4, the condenser 3 is an air-cooled fin-tube heat exchanger.
In this condenser 3, a heat transfer tube 1 a (an example of piping) that forms a part of the circulation path 1 through which the refrigerant flows is inserted from near the upper part of the condenser 3 and circulates in the vicinity of the lower part. It is arranged to be discharged from. Since the refrigerant flowing through the heat transfer tube 1a is a refrigerant compressed by the compressor 2 near the upper part flowing into the condenser 3, the refrigerant is relatively high in temperature (for example, 75 to 95 ° C). In the vicinity of the lower part discharged from the condenser 3, the condenser 3 is cooled to a relatively low temperature (for example, 35 ° C.) by heat exchange with the condenser intake air and the drain water W.

  The condenser 3 is parallel to the flow direction X of the intake air for the condenser that cools the refrigerant in the heat transfer tube 1a (see FIGS. 3 and 4), and a plurality of flat plate-shaped heat transfer fins 11 (transferring heat) are arranged. An example of a hot plate). The condenser intake air sucked from the outside by the condenser fan 8 is caused to flow in the X direction between the adjacent heat transfer fins 11 so that the heat transfer fins 11 cooled by the condenser intake air are removed. The refrigerant flowing through the heat transfer tube 1a can be cooled via the condenser intake air.

  The condenser 3 is composed of a plurality of condensers (two in this embodiment, that is, an upper condenser 3a and a lower condenser 3b) that are divided in the vertical direction and formed separately. . A partition plate 12 that prevents the drain water W that has passed through the upper condenser 3a from descending to the lower condenser 3b is provided at the lower portion of the upper condenser 3a. The water W can be stored in the upper condenser 3a. That is, since the partition plate 12 is formed in a box shape with an open top, the bottom is flat and no through hole is formed, the drain water W can be stored inside the box shape. It is configured. The vertical size of the upper condenser 3a and the lower condenser 3b is appropriately set based on the amount of drain water that needs to be evaporated and the relationship between the amount of refrigerant that needs to be cooled and the temperature. . For example, the size of the condensers 3a and 3b (partition plate 12 is arranged so that the temperature of the refrigerant before passing through the upper condenser 3a and before passing through the lower condenser 3b is about 50 ° C. Height position) can be determined.

In addition, as shown in FIG. 2 and FIG. 3, between the adjacent heat transfer fins 11 for allowing the intake air for the condenser to flow inside the upper condenser 3 a (air side) of the condenser 3. In addition, a flat porous plate 13 (an example of a water absorbing body) is provided. The porous plate 13 can be used without particular limitation as long as it is a porous plate having air permeability and water absorption properties. For example, a fiber body such as glass fiber or a porous body such as sponge can be used. . In the present embodiment, a porous plate 13 made of glass fiber is employed.
As a result, the drain water W generated in the evaporator 5 is dropped into the upper condenser 3a through the drain pan 10 and is absorbed by the porous plate 13, and the drain water W that has not been absorbed by the porous plate 13 is partitioned. It is configured to be stored in the plate 12.
As shown in FIG. 4, a flat porous plate 13 is provided between adjacent heat transfer fins 11 for allowing the intake air for the condenser to flow through the lower condenser 3b of the condenser 3. It is an air-cooled heat exchanger having a conventional configuration that is not provided.

The above is the configuration of the temperature adjustment device according to the present invention. A method for adjusting the temperature of the temperature adjustment target space 30 using this temperature adjustment device will be described below.
When the operation of the temperature adjusting device is started, the control means 9 controls both the temperature of the cooling air cooled and discharged by the evaporator 5 and the temperature of the blown air heated and discharged by the heater 6. Then, the control target temperature of the cooling air (cooling target temperature) is set slightly lower than the control target temperature of the blown air (blowing target temperature). And the control means 9 heats cooling air using the heater 6, and makes the temperature of blowing air become the same as blowing target temperature. In this way, by setting the cooling target temperature slightly lower than the blowout target temperature, the required heating amount in the heater 6 is reduced to reduce the power consumption while improving the accuracy of the temperature control. As a result, the temperature adjustment target space 30 can be precisely adjusted to the blowing target temperature.

  At this time, the control means 9 adjusts the cooling capacity of the evaporator 5, that is, the amount of refrigerant flowing through the evaporator 5 in order to control the temperature of the cooling air. That is, the control means 9 decreases the rotational speed of the compressor 2 to increase the temperature of the cooling air to decrease the amount of refrigerant flowing through the evaporator 5, and compresses it to decrease the temperature of the cooling air. The rotational speed of the machine 2 is increased to increase the amount of refrigerant flowing through the evaporator 5. Moreover, the control means 9 adjusts the energization amount to the electric heater 6 in order to control the temperature of the blown air. Further, the control means 9 adjusts the cooling capacity of the condenser 3, that is, the amount of intake air for the condenser sucked into the condenser 3 in order to control the temperature of the refrigerant in the condenser 3. That is, the control means 9 adjusts the output of the condenser fan 8 to adjust the amount of intake air for the condenser sucked into the condenser 3, so that the temperature of the refrigerant in the condenser 3, in particular, is discharged from the condenser 3. The refrigerant temperature can be adjusted to some extent.

  If the operation of the temperature control device is continued in this way, water (drain water W) is generated on the surface of the evaporator 5 due to condensation. This drain water W is collected by the water collecting portion 10a of the drain pan 10 and stored. Stored sequentially in the unit 10b. The stored drain water W is dripped evenly into the upper condenser 3a through the through-hole provided in the lower part of the storage part 10b, and the glass fiber which is the porous plate 13 provided in the upper condenser 3a. To absorb water. And the drain water W absorbed in the said glass fiber becomes slow in descent | fall speed, and will reach | attain the partition plate 12 provided in the lower part of the upper condenser 3a over a comparatively long time.

Therefore, the relatively high-temperature refrigerant (for example, about 75 ° C. to 95 ° C.) flowing through the heat transfer tube 1a in the vicinity of the glass fiber in the upper condenser 3a is drained water W (for example, about 75 ° C. to 95 ° C.). , About 9 ° C. to 15 ° C.) for a relatively long time, the drain water W evaporates well, and the latent heat of evaporation cools the refrigerant well. The temperature of the refrigerant before being cooled by the upper condenser 3a and flowing into the lower condenser 3b is, for example, about 50 ° C. By forming the size of the upper condenser 3a and the lower condenser 3b (the height position where the partition plate 12 is disposed) so as to reach such a temperature, it is possible to evaporate the drain water well. It can be configured to be possible. Note that the drain water W that has reached the partition plate 12 without evaporating remains in the upper condenser 3a by the partition plate 12, so that the upper condenser maintained at a relatively high temperature due to the influence of the refrigerant. Evaporation can be reliably performed with 3a.
In addition, when the condenser intake air (for example, about 25 ° C.) flows through the evaporator 3, the drain water W (for example, about 9 ° C. to 15 ° C.) absorbed by the glass fiber in the upper condenser 3a. Evaporates and the upper condenser 3a and the lower condenser 3b can satisfactorily cool the refrigerant flowing through the heat transfer tube 1a, and the temperature of the refrigerant discharged from the lower condenser 3b. Is about 35 ° C., for example. Therefore, the drain water W can be reliably evaporated and processed, and the refrigerant in the condenser 3 can be efficiently cooled using the evaporation latent heat of the drain water W.

  Therefore, in the temperature adjusting device, the drainage facility for draining the drain water W generated from the evaporator 5 is not required, and the device configuration is reduced in size, and the cooling efficiency of the refrigerant in the condenser 3, that is, the cooling efficiency of the cold heat is improved. The refrigerant condensing efficiency can be improved.

<Another embodiment>
(1) In the above embodiment, the condenser 3 is divided into two in the vertical direction to form the upper condenser 3a and the lower condenser 3b, and the upper condenser 3a is provided with the porous plate 13, but for the condenser The configuration is not particularly limited as long as the configuration allows the intake air to pass well and the cooling efficiency can be improved. For example, the condenser 3 may be configured as a single unit without being divided, and the porous plate 13 may be provided between adjacent heat transfer plates 11 provided in the condenser 3. That is, the condenser 3 a shown in FIG. 3 can be adopted as the condenser 3.

(2) In the above embodiment, the condenser 3 is divided into two in the vertical direction and the partition plate 12 is provided between the upper condenser 3a and the lower condenser 3b. If it is the structure which can do, it will not specifically limit to this structure, For example, it can also comprise without providing the partition plate 12. FIG. In this case, the drain water W dropped onto the upper condenser 3 a is absorbed by the porous plate 13 and gradually falls, and the drain water W falls along the surface of the heat transfer fins 11. Therefore, the drain water W is vaporized well by heat exchange with the heat transfer fins 11, the condenser intake air, and the refrigerant. In this case, although not shown, a bottom drain pan for storing the drain water W in the event that the drain water W overflows may be provided in the lower part of the lower condenser 3b.

(3) In the above embodiment, the plurality of porous plates 13 are provided between the adjacent heat transfer fins 11, but there is no particular limitation as long as the drain water W can be favorably absorbed and evaporated. Can be adopted. For example, as shown in FIG. 5, the porous body 20 is provided so as to cover the outer peripheral portion of the heat transfer tube 1 b through which the refrigerant flows, and the porous body 20 absorbs drain water W, thereby It is also possible to employ a condenser 3 that can perform heat exchange well.
In this case, the heat transfer tube 1b in which the porous body 20 is provided in the condenser 3a on the upper side is employed, and the heat transfer tube 1a in which the porous body is not provided on the lower evaporator 3b is employed. Thus, the drain water W absorbed in the porous body 20 can be reliably evaporated using a relatively high-temperature refrigerant.

(4) In the above embodiment, the configuration in which the cooling air discharged from the evaporator 5 is heated by the heater 6 is adopted. However, the cooling air is appropriately cooled, and the blowing air having an appropriate temperature is supplied to the temperature adjustment target space 30. If it is the structure which can be supplied, it can also comprise without using the heater 6. FIG.

  The present invention includes a refrigeration cycle in which a refrigerant is circulated in the order of a compressor, an air-cooled condenser, an expansion unit, and an evaporator, and the temperature adjustment target cooled by heat exchange between the refrigerant and the temperature adjustment target air in the evaporator In a temperature adjustment device that adjusts the temperature of a temperature adjustment target space using air, it can be usefully used as a technique that can reduce the size of the device without requiring a drainage facility for draining drain water generated from an evaporator.

2 Compressor 3a Upper condenser (air-cooled condenser)
3b Lower condenser (air-cooled condenser)
4 Expansion valve (expansion part)
5 Evaporator 10 Drain pan 11 Heat transfer fin (heat transfer plate)
12 Partition plate 13 Porous plate (water absorber)
30 Temperature control space W Drain water

Claims (5)

A compressor that compresses the refrigerant; an air-cooled condenser that condenses the refrigerant compressed by the compressor; an expansion unit that expands the refrigerant after being condensed by the condenser; and the expansion unit. An evaporator that evaporates the expanded refrigerant is provided with a refrigeration cycle provided in the order of description, and the temperature adjustment target air cooled by heat exchange between the refrigerant and the temperature adjustment air in the evaporator is used. A temperature adjustment device for adjusting the temperature of a temperature control target space,
The condenser is disposed below the evaporator;
A drain pan is provided between the evaporator and the condenser for storing drain water generated by condensation of the evaporator and dropping the drain water onto the condenser.
The temperature adjustment apparatus provided with the water absorption body provided with the ventilation property which absorbs the drain water dripped from the said drain pan at the air side of the said condenser.   The air-cooled condenser is configured to include a plurality of heat transfer plates arranged in parallel with the flow direction of the condenser cooling air for cooling the refrigerant, and the plurality of water absorbing bodies are arranged in parallel. The temperature adjusting device according to claim 1, which is provided between adjacent heat transfer plates.   3. The temperature adjusting device according to claim 1, wherein the condenser is composed of a plurality of condensers divided in a vertical direction, and the water absorber is provided in an upper condenser into which at least the high-temperature refrigerant flows. .   The partition plate which can store the drain water which passed the upper condenser, and partitions it into the upper condenser and the lower condenser was provided in the lower part of the upper condenser. Temperature control device. The air-cooled condenser is configured to include a plurality of heat transfer plates arranged in parallel with the flow direction of condenser cooling air for cooling the refrigerant,
The temperature adjusting device according to claim 1, wherein the water absorbing body is provided on an outer peripheral portion of a pipe of the refrigerant flowing through the condenser.

Images