JP5102195B2 - Temperature control device - Google Patents

Description

  The present invention includes a cooling heat exchanger that cools the temperature adjustment target fluid, and a heating unit that heats the temperature adjustment target fluid cooled by the cooling heat exchanger, and the temperature adjustment that has passed through the heating unit. The present invention relates to a temperature adjusting device that supplies a target fluid to an air-conditioning target space.

  A conventional temperature control device includes, for example, a refrigeration cycle that circulates a refrigerant in the order of a compressor, a condenser, an expansion unit, and an evaporator, and uses the evaporator as a heat exchanger for cooling. Then, the temperature of the temperature adjustment target fluid is cooled by heat exchange between the refrigerant and the temperature adjustment target fluid in the evaporator to cool the temperature adjustment target fluid, and the cooled temperature adjustment target fluid is heated by the heating means. Is adjusted within a target temperature range (for example, a range of target temperature (20 ° C.) ± 0.1 ° C.). The temperature adjustment target fluid is, for example, temperature adjustment target air supplied to the air conditioning target space, and the temperature adjustment target air in the target temperature range thus adjusted in temperature is supplied to the air conditioning target space ( For example, see Patent Document 1.)

JP 2008-39345 A

For example, in addition to controlling the temperature control target fluid in factories, etc., the temperature of a fluid other than the temperature control target fluid such as compressed air can be controlled, and heat can be used in other applications such as cooling various devices. It may be required to use.
Therefore, for example, it is conceivable to provide a heat source device that generates heat separately from the temperature adjustment device, and use the heat generated by the heat source device for another purpose. However, in this case, a new heat source device must be provided, resulting in an increase in cost.

  The present invention has been made paying attention to such a point, and its purpose is to adjust the temperature of a temperature adjustment target fluid, and in addition to the temperature adjustment apparatus, the heat generated by the apparatus can be used in other applications. Is to provide

In order to achieve this object, the characteristic configuration of the temperature adjusting device according to the present invention includes a cooling heat exchanger for cooling the temperature adjustment target fluid, and a temperature adjustment target fluid cooled by the cooling heat exchanger. A temperature adjusting device including a heating means for heating, and supplying the temperature adjustment target fluid that has passed through the heating means to the air conditioning target space;
The temperature adjustment target fluid cooled by the cooling heat exchanger is supplied to the heating means with the first branch temperature adjustment target fluid and the heat of the temperature adjustment target fluid cooled by the cooling heat exchanger. Branching means for branching to the second branch temperature control target fluid to be supplied to the heat utilization part to be used;
And a merging means for merging the second branch temperature control target fluid that has passed through the heat utilization section with the first branch temperature control target fluid before being supplied to the heating means.

  According to this characteristic configuration, the branching unit not only supplies the first branch temperature adjustment target fluid to the heating unit, but also a second branch that is a part of the temperature adjustment target fluid cooled by the cooling heat exchanger. Since the temperature adjustment target fluid is supplied to the heat utilization unit, the heat utilization unit can acquire the cold heat of the second branch temperature adjustment target fluid by exchanging heat between the second branch temperature adjustment target fluid and the heat medium. Therefore, by using the acquired cold heat, it is possible to control the temperature of a fluid other than the temperature adjustment target fluid or to cool various devices, and it is possible to use the heat in other applications. Therefore, in addition to adjusting the temperature of the temperature adjustment target fluid, the heat generated by the apparatus can be used for other purposes.

In addition, the heat generated by the apparatus is not only made available for other purposes, but also heat exchange for obtaining heat supplied to the heat exchanger and the heat utilization unit for temperature regulation of the temperature control target fluid. It is possible to simplify the configuration by combining the heat exchanger with the heat exchanger for cooling.
In addition, the merging means does not exhaust the second branch temperature adjustment target fluid that has passed through the heat utilization unit to the first branch temperature adjustment target fluid before being supplied to the heating means, It is not necessary to separately provide an exhaust path for exhausting the second branch temperature control target fluid that has passed through the heat utilization unit to the outside of the apparatus, and all of the temperature control target fluid can be supplied to the air conditioning target space. Also in this respect, the configuration can be simplified. The temperature of the first branch temperature adjustment target fluid changes due to the merge of the second branch temperature adjustment target fluid, but the first branch temperature adjustment target fluid and the second branch temperature adjustment target fluid after the combination are heated. The temperature is adjusted by heating by means. As a result, it is possible to simplify the configuration while accurately controlling the temperature of the temperature control target fluid more than that of the first branch temperature control target fluid and using it for temperature control of the air conditioning target space.

  From the above, in addition to controlling the temperature of the temperature control target fluid, the heat generated by the device can be used in other applications, and the air conditioning target space can be used for many temperature control target fluids that have been precisely temperature controlled. Therefore, it is possible to realize a temperature adjustment device that can simplify the configuration without impairing the original function of accurately adjusting the temperature.

  According to a further characteristic configuration of the temperature adjustment device according to the present invention, the heat utilization unit exchanges heat between another temperature adjustment target fluid different from the temperature adjustment target fluid and the second branch temperature adjustment target fluid. It exists in the point comprised by the heat utilization heat exchanger which cools another temperature control object fluid.

  According to this characteristic configuration, in the heat utilization section, the separate temperature control target fluid such as compressed air can be cooled by the heat utilization heat exchanger. Therefore, for example, the heat generated by the apparatus can be used for another purpose of adjusting the temperature of another temperature adjustment target fluid such as compressed air.

  A further characteristic configuration of the temperature adjusting device according to the present invention includes a refrigeration cycle in which a refrigerant is circulated in the order of a compressor, a condenser, an expansion unit, and an evaporator, and a heat transfer liquid cooled by the refrigerant in the evaporator. Is supplied to the cooling heat exchanger, and includes heat transfer liquid supply means for exchanging heat between the heat transfer liquid and the temperature adjustment target fluid.

  In cooling the temperature adjustment target fluid using the refrigerant in the evaporator as a heat source, if the refrigerant and the temperature adjustment target fluid are heat-exchanged in the evaporator, it is difficult to uniformly cool the temperature adjustment target fluid. That is, for example, the temperature of the refrigerant flowing throughout the evaporator is different such that the temperature of the refrigerant flowing through the inlet side of the evaporator differs from the temperature of the refrigerant flowing through the outlet side depending on the degree of change in the state of the refrigerant. Difficult to make uniform. Therefore, when the temperature adjustment target fluid is cooled by the refrigerant in the evaporator, it is difficult to uniformly cool the temperature adjustment target fluid, and temperature unevenness may occur in the temperature adjustment target fluid.

  Therefore, according to this feature configuration, in the evaporator, the temperature control target fluid is not cooled by the refrigerant, but the heat transfer liquid is cooled by the refrigerant. Then, the heat transfer liquid supply means supplies the heat transfer liquid cooled by the evaporator to the cooling heat exchanger, and performs heat exchange between the heat transfer liquid and the temperature adjustment target fluid. To cool down. Since the specific gravity of the heat transfer liquid is larger than that of the refrigerant, the heat transfer liquid can be made uniform in temperature when heat exchange is performed between the heat transfer liquid and the temperature adjustment target fluid. Therefore, the temperature adjustment target fluid can be cooled to a uniform temperature without temperature unevenness.

An embodiment of a temperature control device according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the temperature adjusting device D cools the temperature adjustment target fluid P and heats it to adjust the temperature to a target temperature range, and uses the heat generated by the device in the heat utilization unit 11. The temperature control target fluid Q is configured to be cooled. Here, for example, the temperature adjustment target fluid P uses temperature adjustment target air supplied to the air conditioning target space K in order to adjust the temperature of the air conditioning target space K, and the separate temperature adjustment target fluid Q uses compressed air. ing.
Further, the temperature adjusting device D supplies the temperature-controlled temperature adjustment target fluid P to the air-conditioning target space K to adjust the temperature of the air-conditioning target space K, and at least a part of the temperature control target fluid P in the air-conditioning target space K. Is adjusted to return the temperature to the temperature adjustment device D. That is, the temperature control target fluid P is circulated between the temperature adjustment device D and the air conditioning target space K so as to control the temperature of the air conditioning target space K.

  The temperature adjusting device D includes a refrigerant circuit 5 that circulates refrigerant A (see the dotted arrow in the figure) in the order of the compressor 1, the condenser 2, the expansion valve 3 (corresponding to the expansion part), and the evaporator 4. C and a liquid circuit 6 (corresponding to a heat transfer liquid supply means) for circulating the heat transfer liquid B (see the solid line arrow in the figure) cooled by the refrigerant A in the evaporator 4. Yes. Here, for example, water is used as the heat transfer liquid B.

  The liquid circuit 6 includes an evaporator 4 that cools the heat transfer liquid B by exchanging heat between the expanded refrigerant A and the heat transfer liquid B in the flow direction of the heat transfer liquid B; The heat transfer liquid B and the temperature control target fluid P cooled in this way, the cooling heat exchanger 7 for exchanging heat, the liquid pump 8 for circulating the heat transfer liquid B, the heat transfer liquid B and the compressor 1. And a first reheater 9 for exchanging heat with a part of the refrigerant A discharged from the vehicle. The heat transfer liquid B is cooled by the refrigerant A in the evaporator 4, and the temperature adjustment target fluid P is cooled by the cooling heat exchanger 7 using the cold energy acquired by the cooling.

  And the temperature control apparatus D is provided with the ventilation fan 10 which ventilates the temperature control object fluid P. As shown in FIG. In addition, the temperature adjustment device D includes a first branch temperature adjustment target fluid P1 that supplies the second reheater 12 with the temperature adjustment target fluid P cooled by the heat transfer liquid B in the cooling heat exchanger 7. And the second branch temperature adjustment target fluid P2 to be supplied to the heat utilization unit 11 and the second branch temperature adjustment target fluid P2 that has passed through the heat utilization unit 11 are supplied to the second reheater 12. And a merging means 22 for merging with the first branch temperature adjustment target fluid P1.

Although detailed illustration is omitted, the branching unit 21 is configured by a branch channel that branches the channel of the temperature control target fluid P that has passed through the cooling heat exchanger 7. The branching unit 21 passes through the first branch flow path 23 that guides the first branch temperature adjustment target fluid P1 that has passed through the cooling heat exchanger 7 to the second reheater 12, and the cooling heat exchanger 7. It is comprised from the 2nd branch flow path 24 which guides the 2nd temperature control object fluid P2 to the heat utilization part 11. FIG. The first branch flow path 23 and the second branch flow path 24 include the flow rate of the first branch temperature adjustment target fluid P1 in the first branch flow path 23 and the second branch temperature control target fluid P2 in the second branch flow path 24. The flow passage area and the like are adjusted so that the relationship with the flow rate is a preset relationship (for example, one-to-one). Further, for example, a damper or the like may be provided in each flow path so that the flow rate of the temperature adjustment target fluid P in each flow path can be adjusted.
The merging means 22 is configured by a flow path that supplies the second branch temperature adjustment target fluid P <b> 2 that has passed through the heat utilization unit 11 to an intermediate portion of the first branch flow path 23.

  The second reheater 12 heat-exchanges the first branch temperature adjustment target fluid P1 and the second branch temperature adjustment target fluid P2 merged with the first branch temperature adjustment target fluid P2 and a part of the refrigerant A discharged from the compressor 1 to adjust the temperature. The target fluid P is configured to be heated, and the second reheater 12 corresponds to a heating unit. The heat utilization unit 11 is configured by a heat utilization heat exchanger that exchanges heat between the separate temperature adjustment target fluid Q and the second branch temperature adjustment target fluid P2 to cool the separate temperature adjustment target fluid Q.

The temperature adjustment target fluid P is cooled to a desired temperature by the heat transfer liquid B in the cooling heat exchanger 7, and is divided into the first branch temperature adjustment target fluid P1 and the second branch temperature adjustment target fluid P2 by the branching unit 21. Branch off. In the heat utilization unit 11, the second branch temperature adjustment target fluid P2 and the separate temperature adjustment target fluid Q are heat-exchanged to cool the separate temperature adjustment target fluid Q to a desired temperature. Thereby, in addition to temperature-controlling the temperature control target fluid P, the heat acquired by the heat exchanger 7 for cooling is used for another application in which the temperature of the temperature control target fluid Q is controlled by the heat utilization unit 11. Can be used. Further, the heat exchanger 7 for controlling the temperature of the temperature control target fluid P and the heat exchanger for acquiring the heat supplied to the heat utilization unit 11 are also used in the cooling heat exchanger 7. Simplify.
The temperature of the first branch temperature adjustment target fluid P1 changes due to the merge of the second branch temperature adjustment target fluid P2, but the first branch temperature adjustment target fluid P1 and the second branch temperature adjustment target fluid P2 after the merge. Is heated to a desired temperature by the second reheater 12. As a result, all of the temperature control target fluids P of the first branch temperature control target fluid P1 and the second branch temperature control target fluid P2 are provided without providing an exhaust path for exhausting the second branch temperature control target fluid P2 out of the apparatus. Can be supplied to the air-conditioning target space K, and the original function of precisely controlling the temperature of the air-conditioning target space K with a large number of temperature-control target fluids P that are precisely temperature-controlled is not impaired.

The temperature adjusting device D is configured to circulate the temperature adjustment target fluid P between the air conditioning target space K and adjust the temperature of the air conditioning target space K. For example, when a part of the temperature adjustment target fluid P returned from the air conditioning target space K to the temperature adjustment device D is exhausted outside the device, it is necessary to take in the outside air in order to secure the flow rate of the temperature adjustment target fluid P to be circulated. is there. In this case, outside air that has not been temperature-controlled is taken in, and it becomes difficult to precisely control the temperature of the temperature-control target fluid P, and it may be difficult to accurately control the temperature of the air-conditioning target space K. Moreover, the outside air may contain dust or the like, and the cleanliness of the air-conditioning target space K may be reduced by taking in the outside air.
In the temperature adjustment device D according to the present invention, the temperature adjustment target fluid P returned from the air conditioning target space K to the temperature adjustment device D is branched into the first branch temperature adjustment target fluid P1 and the second branch temperature adjustment target fluid P2. However, the first branch temperature control target fluid P1 and the second branch temperature control target fluid P2 are merged, and the first branch temperature control target fluid P1 and the second branch temperature control target fluid P2 after the merge are precisely temperature controlled. The air is supplied to the air conditioning target space K. As a result, all of the temperature adjustment target fluid P returned from the air conditioning target space K to the temperature adjustment device D can be precisely temperature-controlled and supplied to the air conditioning target space K. Can be a closed circuit that circulates between the temperature adjustment device D and the air-conditioning target space K. Therefore, it is not necessary or almost no need to take in outside air, and it becomes difficult to precisely control the temperature of the air-conditioning target space K, or the occurrence of the problem that the cleanness of the air-conditioning target space K is reduced can be prevented.

  The temperature adjustment device D is provided with a third reheater 13 for exchanging heat with another temperature adjustment target fluid Q cooled by the heat utilization unit 11 and a part of the refrigerant A discharged from the compressor 1. . As a result, the separate temperature adjustment target fluid Q is cooled by the second branch temperature adjustment target fluid P2 in the heat utilization unit 11 and then heated to the desired temperature by the refrigerant A in the third reheater 13. To the supply point.

In the refrigerant circuit 5, a branching / merging passage 14 that is branched from between the compressor 1 and the condenser 2 and joined between the condenser 2 and the expansion valve 3 is provided. The branching / merging channel 14 includes a first branching / merging channel 15, a second branching / merging channel 16, and a third branching / merging channel 17 connected in parallel with each other.
A first refrigerant adjusting valve 18 and a first reheater 9 are provided in the first branch joint flow path 15 in order from the upstream side in the flow direction of the refrigerant A. The first refrigerant adjustment valve 18 and the flow rate of the refrigerant A can be adjusted. Yes. A second refrigerant adjusting valve 19 and a second reheater 12 are provided in the second branch joint channel 16 so that the refrigerant A can be intermittently adjusted and the flow rate of the refrigerant A can be adjusted in order from the upstream side in the flow direction of the refrigerant A. Yes. The third branch joint channel 17 is provided with a third refrigerant regulating valve 20 and a third reheater 13 that can adjust the intermittentness of the refrigerant A and the flow rate of the refrigerant A in order from the upstream side in the flow direction of the refrigerant A. Yes.

The operation when the temperature control target fluid P and the separate temperature control target fluid Q are temperature controlled will be described.
First, in order for the heat transfer liquid B to acquire the cold heat of the refrigerant A flowing through the evaporator 4, the refrigerant A and the heat transfer liquid B are exchanged in the evaporator 4, and the heat transfer liquid B is used in the refrigerant A. Is cooled to the desired temperature. For example, the heat transfer liquid B is cooled to a desired temperature by adjusting the flow rate of the refrigerant A flowing through the evaporator 4 and the flow rate of the heat transfer liquid B. For example, the temperature of the heat transfer liquid B supplied to the evaporator 4 is 20 ° C., and the temperature of the heat transfer liquid B that has passed through the evaporator 4 is 15 ° C.

  The cooling target heat exchanger 7 cools the temperature control target fluid P to the desired temperature in the cooling heat exchanger 7 by using the cold heat acquired by the heat transfer liquid B in this way. For example, the temperature adjustment target is adjusted by adjusting the flow rate of the heat transfer liquid B based on detection information from a temperature sensor (not shown) that detects the temperature of the temperature adjustment target fluid P that has passed through the cooling heat exchanger 7. The fluid P is cooled to a desired temperature of, for example, 17 ± 1.0 ° C. At this time, for example, the temperature of the heat transfer liquid B supplied to the cooling heat exchanger 7 is 15 ° C., and the temperature of the heat transfer liquid B that has passed through the cooling heat exchanger 7 is 17 ° C. On the other hand, the temperature of the temperature adjustment target fluid P supplied to the cooling heat exchanger 7 is set to 22 ° C.

  Then, the second branch temperature adjustment target fluid P2 branched after being cooled by the cooling heat exchanger 7 causes the heat utilization unit 11 to cool the separate temperature adjustment target fluid Q to a desired temperature using the acquired cold energy. . At this time, for example, the temperature of the separate temperature adjustment target fluid Q supplied to the heat utilization unit 11 is 22 ° C., the temperature of the separate temperature adjustment target fluid Q that has passed through the heat utilization unit 11 is 18 ° C., and the heat utilization unit 11 The temperature of the second branch temperature adjustment target fluid P2 that has passed through is set to 19 ° C.

  The first branch temperature adjustment target fluid P1 is merged with the second branch temperature adjustment target fluid P2, and the first branch temperature adjustment target fluid P1 and the second branch temperature adjustment target fluid P2 after the combination are the second reheater 12. Is heated to a desired temperature and supplied to the air-conditioning target space K. For example, the temperature adjustment is performed by adjusting the opening degree of the second refrigerant adjustment valve 19 based on detection information of a temperature sensor (not shown) that detects the temperature of the temperature adjustment target fluid P that has passed through the second reheater 12. The target fluid P is precisely adjusted to a desired temperature of 20 ± 0.1 ° C., for example.

  The separate temperature adjustment target fluid Q cooled by the heat utilization unit 11 is heated to a desired temperature by the third reheater 13 and supplied to a target location where the separate temperature adjustment target fluid Q is used. For example, by adjusting the opening degree of the third refrigerant adjustment valve 20 or the like based on detection information of a temperature sensor (not shown) that detects the temperature of the separate temperature adjustment target fluid Q that has passed through the third reheater 13, The temperature of the temperature adjustment target fluid Q is adjusted to a desired temperature of 20 ° C.

  Incidentally, since the first reheater 9 is provided in the liquid circuit 6, the first refrigerant adjustment valve is in a no-load state where it is not necessary to adjust the temperature of the temperature adjustment target fluid P and the separate temperature adjustment target fluid Q. By opening the valve 18, the heat transfer liquid B is heated by the refrigerant A in the first reheater 9. Then, by supplying the heat transfer liquid B heated by the first reheater 9 to the evaporator 4, freezing or the like in the evaporator 4 is prevented.

[Another embodiment]
(1) In the above-described embodiment, each of the first reheater 9, the second reheater 12, and the third reheater 13 can be carried out instead of a heating means such as an electric heater, for example. Further, the first reheater 9 and the third reheater 13 can be omitted.

(2) In the above embodiment, the temperature control target fluid Q is compressed air, but the temperature control target fluid and the temperature control target fluid may be different from each other, for example, for cooling various devices. It is also possible to use the cooling water to be used as another temperature control target fluid Q. Thereby, the cold acquired in the heat utilization part 11 can be used for the use which cools various apparatuses.

(3) In the above embodiment, the temperature control target fluid P is cooled by providing the liquid circuit 6 and supplying the heat transfer liquid B cooled by the refrigerant A in the evaporator 4 to the cooling heat exchanger 7. For example, the temperature adjustment target fluid P may be directly cooled by the refrigerant A using the evaporator 4 as it is as the cooling heat exchanger 7.

(4) In the above embodiment, as the temperature adjustment device D according to the present invention, the temperature adjustment target fluid P is circulated between the air conditioning target space K and the air conditioning target space K is temperature-controlled. The temperature adjustment device is configured to take outside air into the temperature adjustment target fluid circulated between the air conditioning target space and supply the temperature adjustment target fluid that has taken in the outside air to the air conditioning target space. In addition, it is possible to appropriately change what kind of fluid the temperature adjustment device uses as the temperature adjustment target fluid.

  The present invention includes a cooling heat exchanger that cools a temperature adjustment target fluid, and a heating unit that heats the temperature adjustment fluid cooled by the cooling heat exchanger, and the temperature adjustment target that has passed through the heating unit. In addition to supplying the fluid to the air-conditioning target space and adjusting the temperature of the temperature adjustment target fluid, the present invention can be applied to various temperature control devices that can use the heat generated by the device for other purposes.

Configuration diagram of temperature control device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Expansion part (expansion valve)
4 Evaporator 6 Liquid supply means for heat transfer (liquid circuit)
7 Heat exchanger for cooling 11 Heat utilization part (heat utilization heat exchanger)
12 Heating means (second reheater)
21 Branch means 22 Merge means A Refrigerant B Heat transfer liquid C Refrigeration cycle D Temperature adjusting device K Air conditioning target space P Temperature control target fluid P1 First branch temperature control target fluid P2 Second branch temperature control target fluid Q Separate temperature control target fluid

Claims (3)

A cooling heat exchanger for cooling the temperature adjustment target fluid and a heating means for heating the temperature adjustment target fluid cooled by the cooling heat exchanger, and air-conditioning the temperature adjustment target fluid that has passed through the heating means A temperature control device that supplies the target space,
The temperature adjustment target fluid cooled by the cooling heat exchanger is supplied to the heating means with the first branch temperature adjustment target fluid and the heat of the temperature adjustment target fluid cooled by the cooling heat exchanger. Branching means for branching to the second branch temperature control target fluid to be supplied to the heat utilization part to be used;
A temperature adjusting device comprising: a merging unit that merges the second branch temperature adjustment target fluid that has passed through the heat utilization unit with the first branch temperature adjustment target fluid before being supplied to the heating unit.   The heat utilization unit is a heat utilization heat exchanger that performs heat exchange between another temperature adjustment target fluid different from the temperature adjustment target fluid and the second branch temperature adjustment target fluid to cool the other temperature adjustment target fluid. The temperature adjusting device according to claim 1, which is configured as described above. A refrigerating cycle for circulating the refrigerant in the order of the compressor, the condenser, the expansion unit, and the evaporator;
Heat transfer liquid supply means for supplying the heat transfer liquid cooled by the refrigerant in the evaporator to the cooling heat exchanger and exchanging heat between the heat transfer liquid and the temperature adjustment target fluid; The temperature adjusting device according to claim 1, comprising:

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