JP4435278B2 - Precision temperature control device and precision temperature control method - Google Patents

Description

  The present invention relates to a precision temperature adjustment device and a precision temperature adjustment method.

Usually, in the precision processing field such as the manufacturing process of semiconductor devices, most of them are installed in a clean room in which temperature and humidity are controlled.
However, in recent years, in the precision processing field, processes requiring precision processing with higher processing accuracy than before have been emerging.
In a process that requires such high precision processing, it is usually required that the temperature change environment is smaller than that of a clean room. For this reason, a process requiring high precision processing or the like is provided in a space unit in which precise temperature management is performed.
As a temperature adjusting device used for adjusting the temperature of such a space unit, for example, the temperature adjusting device shown in FIG.
The temperature control apparatus shown in FIG. 13 includes a compressor 100, a three-way valve 102, a condenser 104, an expansion valve 106, a cooler 108, and a heater 110, and a cooling flow path including the cooler 108 and heating. And a heating channel provided with a vessel 110.
The cooler 108 and the heater 110 adjust the temperature of the air flow to be adjusted from the fan 112.

In the temperature adjusting device shown in FIG. 13, the high-temperature heat medium compressed by the compressor 100 is distributed to the cooling channel and the heating channel by the three-way valve 102. The high-temperature heat medium distributed to the cooling channel side is cooled by the condenser 104. The cooled heat medium is adiabatically expanded and cooled by the expansion valve 106, and is supplied to the cooler 108. In the cooler 108, the heat medium that has been heated to absorb the temperature while cooling the air flow to be temperature-adjusted blown from the fan 112 is supplied to the compressor 100.
On the other hand, the high-temperature heat medium distributed to the heating flow path side is supplied to the heater 110, and the air flow to be temperature-adjusted cooled by the cooler 108 is heated and adjusted to a desired temperature. As described above, the heating medium that is radiated and cooled while heating the air flow to be temperature adjusted in the heater 110 passes through the expansion valve 106 and the cooler 108 and is supplied to the compressor 100.

JP-A 51-97048

In the temperature adjusting device shown in FIG. 13, the entire amount of the high-temperature heat medium compressed by the compressor 100 passes through the expansion valve 106, is adiabatically expanded and cooled, and is supplied to the cooler 108. The amount of cooling energy for cooling the air stream to be temperature-adjusted blown out from the air is constant.
On the other hand, by adjusting the flow rate of the high-temperature heat medium distributed to the heating flow path side by the three-way valve 102, the heating amount in the heater 110 with respect to the air flow to be temperature-adjusted cooled by the cooler 108 can be adjusted.
Therefore, it is possible to adjust the temperature of the air flow to be temperature-adjusted that passes through the cooler 108 and the heater 110, and to manage the temperature in the space unit in a narrow temperature range.

However, in the temperature adjusting device shown in FIG. 13, the entire amount of the high-temperature heat medium compressed by the compressor 100 passes through the expansion valve 106, is adiabatically expanded and cooled, and is supplied to the cooler 108. The temperature adjustment for the air flow to be adjusted from the fan 112 is performed by reheating the high-temperature heat medium compressed by the compressor 100 supplied to the heater 110 exclusively.
Therefore, in the temperature control method adopted in the temperature adjusting device shown in FIG. 13, the heat medium used for heating is also passed through the cooling flow path, so the amount of heat that can be heated is only the amount of heat generated by the power of the compressor. It is difficult to respond to load fluctuations on the device 110.
For this reason, when the set temperature of the air flow subject to temperature adjustment passing through the cooler 108 and the heater 110 is significantly increased, the temperature of the air flow subject to temperature adjustment does not reach the set temperature or reaches the set temperature. It may take a long time to complete.
In order to make up for such a shortage of heating amount of the temperature adjusting device shown in FIG. 13, it is conceivable to provide the auxiliary electric heater 114 as shown in FIG. 14, but this is wasteful in terms of energy.
Therefore, the present invention solves the problems of the conventional temperature adjustment device that lacks the heating ability for the fluid whose temperature is to be adjusted, and can improve the heating ability for the fluid whose temperature is to be adjusted, and can also save energy. It is to provide an apparatus and a precise temperature control method.

  In order to achieve the above-mentioned problems, the present inventors provide a cooling channel and a heating channel, a cooling amount for the temperature adjustment target fluid that passes through the cooling unit of the cooling channel and the heating unit of the heating channel. Providing a distribution means capable of changing the heating amount and heating amount, providing a heat pump means capable of transferring heat from a low-temperature part to a high-temperature part in order to improve the heating capacity of the heating flow path, and heating the heating flow path Considering that it is effective to reduce the amount of heat that cancels each other out of the amount of heating applied to the fluid subject to temperature adjustment by the means and the amount of cooling applied to the fluid subject to temperature adjustment by the cooling means in the cooling channel did. As a result, as shown below, the present inventors have found a means for solving the above problems.

  That is, the present inventors, as means for solving the above problems, are a heating flow path comprising heating means to which a part of the high-temperature first heat medium compressed and heated by a compressor is supplied, and the high temperature Condensing means to which the remaining portion of the first heat medium is supplied, and cooling means to which the first heat medium cooled by the condensing means is adiabatically expanded by the first expansion means and further cooled and supplied. Provided with a cooling flow path, and the high temperature first heat medium includes a heating flow path and a cooling flow path so as to adjust a temperature adjustment target fluid passing through the heating means and the cooling means to a predetermined temperature. And a high temperature discharged from the compressor, wherein the first heat medium that has passed through each of the heating flow path and the cooling flow path joins and is re-supplied to the compressor. A part of the first heat medium is distributed to the heating flow path side, and the high-temperature first heat is distributed. A distribution means for distributing the remainder of the body to the cooling flow path side and changing a distribution ratio of the high-temperature first heat medium distributed to the heating flow and the cooling flow path; and for releasing heat by the heating means. A heat pump means comprising a heat absorbing means for absorbing heat from the second heat medium, which is an external heat source, after the first heat medium that has been adiabatically expanded by the second expansion means after being cooled by the second expansion means, and the distribution means. Controlling and adjusting the distribution ratio of the high temperature first heat medium distributed to the heating flow path and the cooling flow path to control the temperature adjustment target fluid passing through the heating means and the cooling means to a predetermined temperature. And a rotation speed control means for controlling the rotation speed of the compressor, the distribution ratio of the high temperature first heat medium controlled by the first control section is adjusted by the heating means. The amount of heat applied to the subject fluid and the cooling means A second control unit that changes the rotational speed of the compressor via the rotational speed control means so as to obtain a distribution ratio that can reduce the amount of heat that cancels each other out of the cooling amount applied to the fluid to be adjusted; The provided precise temperature control device can be provided.

  Further, as a means for solving the above problems, the inventors of the present invention have a heating flow path provided with a heating means to which a part of a high temperature first heat medium compressed and heated by a compressor is supplied, and the high temperature Condensing means to which the remaining portion of the first heat medium is supplied, and cooling means to which the first heat medium cooled by the condensing means is adiabatically expanded by the first expansion means and further cooled and supplied. Distributing a cooling flow path and a part of the high temperature first heat medium discharged from the compressor to the heating flow path side, and distributing a remaining portion of the high temperature first heat medium to the cooling flow path side. And a distribution means capable of changing a distribution ratio of the high-temperature first heat medium distributed to the heating flow path and the cooling flow path, and a second expansion means after the heat is released and cooled by the heating means. The first heat medium, which has been expanded adiabatically and further cooled, absorbs heat from the second heat medium, which is an external heat source. A heat pump means comprising a heat absorption means, and using a precision temperature adjustment device in which the first heat medium that has passed through each of the heating flow path and the cooling flow path is joined and re-supplied to the compressor, The distribution ratio of the high temperature first heat medium distributed to the heating flow path and the cooling flow path is adjusted, and the temperature adjustment target fluid passing through the heating means and the cooling means is controlled to a predetermined temperature, while the high temperature The distribution ratio of the first heat medium can be reduced by the amount of heat that cancels each other out of the heating amount applied to the temperature adjustment target fluid by the heating unit and the cooling amount applied to the temperature adjustment target fluid by the cooling unit. It is possible to provide a precise temperature adjustment method for changing the rotation speed of the compressor so as to obtain a distribution ratio.

In the means for solving the problems provided by the present inventors, the following preferred embodiments can be raised.
The second control unit controls the rotation speed of the compressor via the rotation speed control means so that the distribution ratio of the high temperature first heat medium to the heating means or the cooling means is in the range of 5 to 15%. In particular, when the distribution ratio of the high temperature first heat medium is on the heating side with respect to the fluid to be adjusted, 95 to 85% of the high temperature first heat medium is distributed to the heating means and the remaining high temperature first heat medium is distributed. On the other hand, in the case where the temperature adjustment target fluid is on the cooling side so that 5 to 15% of the heat medium is distributed to the cooling means, 95 to 85% of the high temperature first heat medium is cooled. Precise temperature adjustment by controlling the rotational speed of the compressor through the rotational speed control means so that 5 to 15% of the remaining high temperature first heat medium is distributed to the heating means. The precise temperature control device can be stably operated while saving energy of the device. As this rotation speed control means, an inverter can be suitably used.

In addition, the cooling medium supplied to the condensing means of the cooling flow path to cool the high-heat first heat medium and the second heat medium supplied to the heat absorbing means of the heat pump means are made the same heat medium and supplied to the condensing means Then, it is preferable that the heat of the high-temperature first heat medium removed by the condensing means can be effectively utilized by supplying the heat absorbing means.
As the second heat medium, it is preferable from the viewpoint of energy saving to use the second heat medium supplied without being heated or cooled from the outside.
Further, among the flow paths from the distribution means to the first heat medium being joined, each of the flow path including the cooling flow path and the flow path including the heating flow path and the heat pump means is provided independently as a flow path. As a result, the temperature adjustment range of the temperature adjustment target fluid can be widened. The flow path including the heating flow path is provided with a heating means, a second expansion means and a heat absorption means, and the flow path including the cooling flow path is provided with a condensation means, a first expansion means and a cooling means. .

Here, as the distribution means for distributing the high temperature first heat medium to the heating flow path and the cooling flow path, the distribution ratio of the high temperature first heat medium distributed to the heating flow path and the cooling flow path is substantially set. By using the distribution means that can be changed continuously, the temperature adjustment of the fluid to be temperature-adjusted can be adjusted more precisely.
As a distribution means for distributing the high temperature first heat medium to the heating flow path and the cooling flow path, the distribution ratio of the high temperature first heat medium distributed to the heating flow path and the cooling flow path is substantially continuous. By using the changeable distribution means, the temperature adjustment of the temperature adjustment target fluid can be adjusted more accurately.
This “substantially changeable distribution means” means that a two-way valve or a proportional three-way valve is used as the distribution means, and when the two-way valve or the proportional three-way valve is driven by step control, This means that the three-way valve or the proportional three-way valve is microscopically driven stepwise, but includes a case where it is driven continuously as a whole.

Further, as a distribution means, the total amount of the high temperature first heat medium distributed to the heating flow path side and the high temperature first heat medium distributed to the cooling flow path side is the amount of the high temperature first heat medium discharged from the compressor. By using the proportional three-way valve for proportionally distributing the high temperature first heat medium so as to be equal, the distribution ratio of the high temperature first heat medium discharged from the compressor can be changed smoothly.
Alternatively, the distribution unit includes a branch pipe that branches the high-temperature first heat medium into the heating flow path side and the cooling flow path side, and a two-way valve provided in each of the branch pipes, The distribution ratio of the high-temperature first heat medium distributed to the flow path and the cooling flow path is adjusted to control the temperature adjustment target fluid passing through the heating means and the cooling means to a predetermined temperature, and the heating flow The total amount of the high temperature first heat medium distributed to the road side and the high temperature first heat medium distributed to the cooling flow path side is equal to the amount of the high temperature first heat medium discharged from the compressor. The distribution ratio of the high-temperature first heat medium discharged from the compressor can also be changed smoothly by using a control unit that adjusts the opening of each two-way valve.
Further, the liquid medium for supplying the liquid medium for cooling the high-temperature first heat medium to the condensing means of the cooling channel and supplying the liquid medium to the condensing means so as to keep the pressure on the discharge side of the compressor constant. By providing the refrigerant control means for controlling the supply amount, it is possible to prevent the cooling medium from flowing unnecessarily to the condensing means.
In addition, when the fluid whose temperature is to be adjusted is an air flow, the cooling means and the heating means are arranged so that the air flow reduced in humidity by being blown to the cooling means is blown to the heating means. In addition, dehumidification of the air flow to be temperature adjusted can also be performed.
On the other hand, in this case, the accuracy of the air flow temperature adjustment can be further improved by disposing the heating means and the cooling means so as to blow the air flow heated by the heating means to the cooling means. .

According to the precise temperature adjusting device and the precise temperature adjusting method proposed by the present inventors, the high-temperature first heat medium discharged from the compressor to each of the heating means of the heating channel and the cooling means of the cooling channel. Is supplied. Further, the distribution means changes the distribution ratio of the high-temperature first heat medium distributed to the heating flow path and the cooling flow path, so that the heating amount and the cooling for the temperature adjustment target fluid passing through the heating means and the cooling means are changed. The amount can be adjusted easily.
In such a precise temperature adjusting device and a precise temperature adjusting method, a heat pump means is provided. Since this heat pump means is a means capable of transferring heat from a low-temperature part to a high-temperature part, among the high-temperature first heat medium (the high-temperature part) heated by being compressed by the compressor, the heat flow path The first heat medium which has been cooled by releasing heat by the heating means and then further adiabatically expanded by the second expansion means and further cooled by the heat absorption means constituting the heat pump means (the second heat medium (external heat source)) It is possible to absorb heat from the lower temperature portion and raise the temperature and return it to the compressor.
For this reason, according to the precise temperature control apparatus and the precise temperature control method proposed by the present inventors, the high-temperature first heat medium (the high temperature part) discharged from the compressor contains the compression power energy generated by the compressor. In addition, energy absorbed from the second heat medium (low temperature portion) of the external heat source by the heat pump means can be applied, and the heating capability of the heating means to which the high temperature first heat medium is supplied can be improved.
Therefore, in the precise temperature adjustment device and the precise temperature adjustment method proposed by the present inventors, minute load fluctuations of the temperature adjustment target fluid passing through the heating means and the cooling means are caused in the heating flow path and the cooling flow path. By finely adjusting the distribution ratio of the high-temperature first heat medium to be distributed, it is possible to quickly cope with it, and it is possible to precisely adjust the temperature of the temperature adjustment target fluid.
Further, even when the set temperature of the fluid to be temperature adjusted that passes through the heating means and the cooling means is significantly increased, the distribution ratio that distributes the distribution ratio of the high-temperature first heat medium to the heating flow path rather than the cooling flow path. Is significantly increased, the temperature adjustment target fluid can be adjusted to a predetermined temperature.
Moreover, in the precise temperature adjustment device and the precise temperature adjustment method proposed by the present inventors, the rotation speed of the compressor is changed to adjust the distribution ratio of the high-temperature first heat medium, and the temperature adjustment target is adjusted by the heating means. Of the amount of heating applied to the fluid and the amount of cooling applied to the fluid whose temperature is to be adjusted by the cooling means, the amount of heat that cancels each other can be reduced. For this reason, in combination with the provision of the heat pump means, further energy saving can be achieved.
As described above, in the precise temperature adjustment device and the precise temperature adjustment method proposed by the present inventors, even if the auxiliary heater such as the auxiliary electric heater is made unnecessary or downsized, the fluid subject to temperature adjustment is precisely adjusted to a predetermined temperature. And energy saving can be achieved.

It is the schematic explaining the reference example of a precise temperature control apparatus. It is explanatory drawing explaining the internal structure of the control valve 40 used for the precise temperature control apparatus shown in FIG. It is the schematic explaining the other reference example of a precise temperature control apparatus. It is the schematic explaining the other reference example of a precise temperature control apparatus. It is explanatory drawing explaining the other distribution means which can be used with the precise temperature control apparatus shown in FIGS. It is a graph which shows the flow volume characteristic of the gate valve used with the distribution means shown in FIG. FIG. 2 is an explanatory diagram for explaining the principle of energy saving in the precise temperature control apparatus shown in FIG. 1 when it is on the cooling side. FIG. 2 is an explanatory diagram for explaining the principle of energy saving in the precise temperature control apparatus shown in FIG. 1 when it is on the heating side. It is the schematic explaining the precise temperature control apparatus as a means to solve the subject which the present inventors provided. It is a flowchart for demonstrating the control procedure by the 1st control part 22a and the 2nd control part 22b of the temperature control apparatus shown in FIG. It is the schematic explaining the other reference example of a precise temperature control apparatus. It is the schematic explaining the other reference example of a precise temperature control apparatus. It is the schematic explaining the conventional temperature control apparatus. It is the schematic explaining the example of improvement of the conventional temperature control apparatus.

A schematic diagram illustrating a reference example of the precision temperature control apparatus is shown in FIG. In the precision temperature control apparatus shown in FIG. 1, the air in which the temperature and humidity in the clean room are adjusted as the fluid sucked by the fan 12 is further introduced into the space unit 10 installed in the temperature-controlled clean room. A heating flow path and a cooling flow path for precisely adjusting the temperature are provided.
A heater 14 as a heating means constituting the heating flow path and a cooler 16 as a cooling means constituting the cooling flow path are provided, and the air in the clean room sucked into the space unit 10 is cooled and then heated. And adjust the temperature precisely. According to the arrangement of the cooler 16 and the heater 14 with respect to the air flow, dehumidification of the air flow passing through the heater 14 and the cooler 16 can be further improved.
The heater 14 and the cooler 16 are supplied with, for example, hydrocarbons such as propane, isobutane, and cyclopentane, chlorofluorocarbons, ammonia, and carbon dioxide as the first heat medium, and clean room is obtained by vaporizing and liquefying the first heat medium. The inside air is heated and cooled to adjust to a predetermined temperature.
Such a first heat medium is compressed and heated by the compressor 18 and discharged in the form of a gas at a high temperature (for example, 70 ° C.). The high-temperature first heat medium discharged from the compressor 18 is distributed to the heating channel side provided with the heater 14 and the cooling channel side provided with the cooler 16 by the proportional three-way valve 20 serving as a distribution unit. .

In this proportional three-way valve 20, the total amount of the high temperature first heat medium distributed to the heating flow path side and the high temperature first heat medium distributed to the cooling flow path side is the high temperature first heat medium discharged from the compressor 18. Distribute to equal the amount.
The proportional three-way valve 20 is controlled by the first control unit 22a. In the first control unit 22a, the measured temperature measured by the temperature sensor 24 provided in the space unit 10 is compared with the set temperature, and the heating channel side is set so that the measured temperature matches the set temperature. The distribution ratio of the high-temperature first heat medium distributed to the cooling flow path side is changed substantially continuously, and the fluid sucked into the space unit 10 is adjusted to a predetermined temperature.
This “substantially continuously changing” means that when the proportional three-way valve 20 is driven by step control, the proportional three-way valve 20 is microscopically driven stepwise, but is continuously continuous as a whole. This includes the case where it is driven.

The set temperature set in the first control unit 22a may be arbitrarily set. Further, the temperature sensor 24 shown in FIG. 1 is installed on the discharge side of the fan 12, but may be installed on the suction side of the fan 12, or may be provided on the discharge side and suction side of the fan 12.
The high temperature first heat medium distributed to the heating flow path side is directly supplied to the heater 14 and heats the air flow sucked into the space unit 10 to adjust to a predetermined temperature. At that time, the high-temperature first heat medium is radiated and cooled to become the first heat medium containing the condensate.
On the other hand, the high-temperature first heat medium distributed to the cooling flow path side is cooled by the condenser 26 as the condensing means and then adiabatically expanded by the expansion valve 28 as the expanding means to be further cooled (for example, 10 ° C. Cooled). The cooled first heat medium is supplied to the cooler 16, and the air flow sucked into the space unit 10 and heated by the heater 14 is cooled and adjusted to a predetermined temperature. At that time, the first heat medium supplied to the cooler 16 is heated by absorbing heat from the air flow. In this way, by blowing the air flow that has been blown to the heater 14 and raised in temperature to the cooler 16, the accuracy of temperature adjustment of the air flow can be improved.

The second heat medium supplied to the condenser 26 without being heated or cooled from the outside via the piping 30 for cooling the high-temperature first heat medium distributed to the heater 14 side. As the cooling water is supplied. The cooling water is heated to about 30 ° C. by the first heat medium of about 70 ° C. in the condenser 26 and is discharged from the pipe 31. The cooling water discharged from the pipe 31 is supplied as a heat source to a heat absorber 32 as a heat absorption unit of the heat pump unit.
The heat absorber 32 is supplied with a first heat medium at about 10 ° C., which is adiabatically expanded by the expansion valve 34 and further cooled by the first heat medium radiated by the heater 14. For this reason, in the heat absorber 32, based on the temperature difference between the cooling water that has absorbed heat in the condenser 26 and has been heated to about 30 ° C., and the first heat medium that has been cooled to about 10 ° C., Can absorb heat from cooling water.
The first heat medium that has been heated by absorbing heat from the cooling water by the heat absorber 32 is supplied to the compressor 18 via the accumulator 36. The accumulator 36 is also supplied with a first heat medium that absorbs heat from the air flow supplied to the cooler 16 and sucked into the space unit 10. Since the accumulator 36 is a type of accumulator that can store the liquid component and re-supply only the gas component to the compressor 18, it can reliably supply only the gas component of the first heat medium to the compressor 18.
As this accumulator 36, an accumulator type accumulator can be used.
Even if the accumulator 36 is not installed, a heat medium that has been heated by absorbing heat from the cooling water by the heat absorber 32 and a heat medium that has absorbed heat from the fluid supplied to the cooler 16 and sucked into the space unit 10. And can be re-supplied to the compressor 18.

By the way, the first heat medium radiated by the heater 14 is adiabatically expanded and cooled by the expansion valve 34, but in the cooling by the adiabatic expansion in the expansion valve 34, the first heat medium is between the first heat medium and the outside. There is no exchange of heat. For this reason, the first heat medium cooled adiabatically can absorb heat from the cooling water as the second heat medium supplied from the outside to the heat absorber 32 via the condenser 26.
Therefore, energy absorbed from the cooling water supplied from the outside by the heat absorber 32 of the heat pump means can be added to the compression power energy by the compressor 18 to the high temperature first heat medium discharged from the compressor 18. . Furthermore, in the precise temperature control apparatus shown in FIG. 1, the cooling water supplied from the outside is supplied to the heat absorber 32 via the condenser 26, and is removed from the high-temperature first heat medium by the condenser 26. Part of the energy can also be added to the high-temperature first heat medium discharged from the compressor 18, and the heating capacity of the heating flow path can be improved. As a result, it is not necessary to use other heating means such as an auxiliary heater.

As described above, in the precise temperature control apparatus shown in FIG. 1, the heating capacity of the heating channel can be improved by installing the heat pump means, and the high-temperature first heating medium distributed to the heating channel side by the proportional three-way valve 20 and the cooling The distribution ratio with the high-temperature first heat medium distributed to the flow path side can be changed substantially continuously according to the temperature in the space unit 10.
For this reason, in the precise temperature control apparatus shown in FIG. 1, the high-temperature first heat medium is always supplied to the heating flow path and the cooling flow path, and the heater 14 of the heating flow path and the cooler 16 of the cooling flow path are The minute load fluctuation of the air flow to be temperature-adjusted that passes through the air flow is promptly adjusted by immediately adjusting the distribution ratio of the high-temperature first heat medium distributed to the heating flow path and the cooling flow path by the proportional three-way valve 20. It can cope and can improve responsiveness.
As a result, it is possible to control the temperature of the air flow to be adjusted through the heater 14 in the heating channel and the cooler 16 in the cooling channel with an accuracy of ± 0.1 ° C. or less with respect to the set temperature. The temperature change of the space unit 10 in which the temperature adjusting device shown in FIG. 1 is installed can be made smaller than the temperature change of the clean room, and a process requiring precision machining can be installed.

Further, in the temperature adjusting device shown in FIG. 1, as described above, the heating capacity of the heating channel is improved, and the proportional three-way valve 20 serving as the distribution unit among the channels including the heating channel and the cooling unit is used. Each of the flow path including the heating flow path and the flow path including the cooling flow path until the first heat medium that has passed through each of the cooler 16 and the heat absorber 32 is joined by the accumulator 36 is independent of the flow path. Is provided. For this reason, even when the set temperature of the air flow to be temperature adjusted passing through the heater 14 and the cooler 16 is significantly increased, the proportional three-way valve 20 allows the distribution ratio of the high-temperature first heat medium to be higher than that of the cooling flow path. In addition, the distribution ratio distributed to the heating flow path can be significantly increased, and the air flow to be temperature adjusted can be quickly adjusted to a predetermined temperature.
As a result, for example, in the temperature adjusting device shown in FIG. 13, the temperature setting range is about 20 to 26 ° C., but in the temperature adjusting device shown in FIG. 1, the temperature setting range is greatly expanded to 18 to 35 ° C. it can.
The heater 14, the second expansion valve 43 and the heat absorber 32 are provided in the flow path including the heating flow path, and the condenser 26 and the first expansion valve 28 are provided in the flow path including the cooling flow path. And a cooler 16 is provided.

Further, in the temperature adjusting device shown in FIG. 1, the heating capacity of the heating channel is improved, and it is not necessary to use other heating means such as an auxiliary heater. Therefore, the temperature adjusting device provided with the auxiliary heater 114 shown in FIG. Compared with, significant energy saving can be achieved.
For example, in the temperature control apparatus provided with the auxiliary heater 114 shown in FIG. 14, the breakdown of the total energy consumption is 18% for the compressor 100, 69% for the auxiliary heater 114, and 13% for the blower 112. In this regard, the temperature adjustment device shown in FIG. 1 can cut the energy consumption of the auxiliary heater 114.
For this reason, when the system of the temperature control apparatus shown in FIG. 14 is applied to a water-cooled air conditioner with a discharge amount of about 20 m ³ / min, the maximum power consumption is 11.7 KW, but it is shown in FIG. When the temperature control system is applied, the maximum power consumption can be reduced to about 2.4 KW.

As described above, in the temperature adjusting apparatus shown in FIG. 1, the control valve 40 as the refrigerant control means is provided in the pipe 30 that supplies the cooling water to the condenser 26. The control valve 40 is controlled so that the discharge pressure of the compressor 18 is constant. As shown in FIG. 2, the control valve 40 is provided with a rod-like portion including a valve body 40 b that opens and closes an opening of a valve portion 40 a provided in the cooling water flow path. The rod-like portion is biased in a direction in which the valve body 40b closes the opening of the valve portion 40a by a spring 40c with which the tip end surface abuts. Further, the other end surface of the rod-shaped portion is in contact with the bellows 40d to which the pressure of the first heat medium discharged from the compressor 18 is supplied, and the rod-shaped portion is opened against the urging force of the spring 40c. The valve body 40b is urged in a direction to release the valve.
Therefore, when the discharge pressure of the compressor 18 becomes equal to or greater than the urging force of the spring 40c, the valve body 40b is moved in the direction to open the opening of the valve portion 40a by the bellows 40d of the control valve 40 and supplied to the condenser 26. The amount of cooling water to be increased increases, and the cooling capacity of the condenser 26 is improved. For this reason, the discharge pressure of the compressor 18 decreases.
On the other hand, when the discharge pressure of the compressor 18 becomes equal to or less than the biasing force of the spring 40c of the control valve 40, the valve body 40b moves in a direction to close the opening of the valve portion 40a, and the amount of cooling water supplied to the condenser 26 Decreases and the cooling capacity of the condenser 26 decreases. For this reason, the discharge pressure of the compressor 18 becomes high.
In this way, by keeping the discharge pressure of the compressor 18 constant, the precise temperature adjusting device can be stably operated. Moreover, it can adjust so that the amount of cooling water may be supplied to the condenser 26 more than needed, and it may not discharge | emit out of the system.

By the way, when the temperature setting of the air flow passing through the heater 14 and the cooler 16 is significantly increased, the first control unit 22a fully opens the opening of the discharge port on the cooling flow path side of the proportional three-way valve 20. Or while making it the state close | similar to a fully closed state, let the discharge port by the side of a heating flow path be a fully open state or a state close to a fully open state.
When the temperature of the air flow to be temperature adjusted is low, the high temperature first heat medium supplied to the heater 14 in the heating flow path is condensed by the low temperature air flow in the heater 14, and the compressor 18. Therefore, the control valve 40 is closed and the cooling water is not supplied to the condenser 26.
In this way, when the cooling water is not supplied to the condenser 26, the cooling water supplied from the condenser 26 to the heat absorber 32 of the heat pump means is also not supplied. For this reason, the heat absorber 32 becomes an operation stop state, and a heat pump means stops functioning.
In addition, heat exchange between the first heat medium, which is radiated and condensed by the heater 14, is adiabatically expanded by the expansion valve 34 and cooled, and the cooling water is not performed, and the heat absorber 32 may freeze. There is.

For this reason, a control valve 44 is provided in the bypass pipe 42 of the control valve 40 as means for supplying cooling water to the heat absorber 32 as in the precise temperature adjusting device shown in FIG. In the control valve 44, the opening degree of the discharge port on the cooling channel side of the proportional three-way valve 20 is in a fully closed state or a state close to a fully closed state, and the discharge port on the heating channel side is in a fully open state or a state close to a fully open state. When this occurs, it opens by a signal from the first control unit 22a, forcibly supplies cooling water to the condenser 26, and the heat absorber 32 is in an operating state.
For this reason, when the temperature setting of the air flow that passes through the heater 14 and the cooler 16 is significantly increased, or when the air flow that passes through the heater 14 and the cooler 16 is low temperature, Even when the distribution ratio of the high-temperature first heat medium to be distributed becomes zero or in the vicinity thereof, a predetermined amount of cooling water can be supplied to the heat absorber 32 to prevent the heat absorber 32 from freezing and to function as a heat pump means. It can be demonstrated.

When the discharge pressure of the compressor 18 increases and reaches a predetermined pressure, the control valve 44 is closed by a signal from the first control unit 22a. Thereafter, the supply amount of the cooling water supplied to the condenser 26 is controlled so that the pressure on the discharge side of the compressor 18 is kept constant by the control valve 40.
In the precise temperature control apparatus shown in FIG. 3, the air flow blown to the cooler 16 and cooled is blown to the heater 14. In this way, by first blowing an air flow to the cooler 16, moisture in the air flow can be condensed and dehumidified.
In the precise temperature adjusting device shown in FIG. 3, when the constituent members are the same as those of the precise temperature adjusting device shown in FIG. 1, the same reference numerals as those in FIG. The explanation was omitted.

In the precise temperature control apparatus shown in FIGS. 1 and 3, cooling water is used as the second heat medium supplied to the condenser 26 and the heat absorber 32 of the heat pump means, but as shown in FIG. An air flow generated by the fan 46 can be used as the second heat medium supplied to the heat absorber 32 of the heat pump means.
In the precision temperature control apparatus shown in FIG. 4, the first heat medium radiated by the heater 14 is adiabatically expanded by the expansion valve 34 and further cooled and supplied to the heat absorber 32 supplied to the condenser 26 by the fan 46. And heated air flow is blown. For this reason, in the heat absorber 32, the first heat medium, which is radiated and condensed by the heater 14 and adiabatically expanded and further cooled, absorbs heat from the air flow and is heated.
In the precise temperature adjusting device shown in FIG. 4, when the constituent members are the same as those of the precise temperature adjusting device shown in FIG. 1, the same reference numerals as those in FIG. The explanation was omitted.

  Further, instead of the proportional three-way valve 20 as the distribution means used in the temperature control device shown in FIGS. 1 to 4, two gate valves 38a and 38b as two-way valves are used as shown in FIG. Can do. Each of the two gate valves 38a and 38b is controlled by the first controller 22a. The opening degree of each of the gate valves 38a and 38b is adjusted by the first control unit 22a, and the gaseous high temperature first heat medium compressed and heated by the compressor 18 is used as a heating channel and a cooling channel. The distribution ratio to be distributed is adjusted substantially continuously, and the air flow passing through the heater 14 and the cooler 16 is controlled to a predetermined temperature. At that time, the total amount of the high temperature first heat medium amount distributed to the heater 14 side and the high temperature first heat medium amount distributed to the cooler 16 side is the first high temperature discharged from the compressor 18. The opening of the gate valves 38a and 38b is adjusted so as to be equal to the amount of heat medium, and is continuously proportionally distributed.

At that time, as shown in FIG. 6, in each of the gate valves 38a and 38b, the relationship between the valve opening and the flow rate is not linear. For this reason, the first control unit 22a holds the flow rate characteristic data for each of the gate valves 38a and 38b shown in FIG. 6, and the first control unit 22a is based on the flow rate characteristics of the gate valves 38a and 38b. An opening signal is transmitted to each gate valve 38a, 38b.
Here, “to adjust the distribution ratio distributed to the heating flow path and the cooling flow path substantially continuously” or “to adjust the distribution ratio substantially continuously” is step control of the gate valves 38a and 38b. When adjusting the distribution ratio between the heating flow path and the cooling flow path, the opening degree of the gate valves 38a, 38b is microscopically driven and adjusted, but as a whole, It means to include the case where it is continuously driven and adjusted.

1 to 4, in the temperature adjustment of the air flow as the temperature adjustment target by the heater 14 and the cooler 16, for example, in the case of being on the cooling side with respect to the air flow of the temperature adjustment target In the operation state where the air temperature is stable, the air cooled by the cooler 16 is heated by the heater 14 as shown in FIG. In the operation state shown in FIG. 7A, the energy heated by the heater 14 may be larger than the energy A required for cooling the airflow. In this case, as shown in FIG. 7B, energy can be saved if the overlapping energy between the cooler 16 and the heater 14 can be reduced.
On the other hand, when it is on the heating side with respect to the air flow to be adjusted, in the operation state where the air temperature is stable, the air flow heated by the heater 14 is cooled by the cooler 16 as shown in FIG. is doing. In the operating state shown in FIG. 8A, the energy to cool by the cooler 16 may be larger than the energy B required for heating the airflow. In this case, as shown in FIG. 8B, if the overlapping energy between the cooler 14 and the heater 16 can be reduced as much as possible, energy saving can be achieved.
However, if the supply of the high-temperature first heat medium to the heater 14 and the cooler 16 is turned on and off so that the amount of heat canceling each other is zero, the operation of the precision temperature control device becomes unstable, and the air flow It takes time to stabilize at a predetermined temperature. For this reason, to the extent that the precise temperature control device can be stably operated, it is necessary that the amount of heat that cancels each other out of the amount of heat applied to the heater 14 and the amount of cooling applied to the cooler 16 must be present at a minimum. .
The minimum necessary amount of heat that cancels each other is somewhat different depending on the precise temperature adjusting device, and is preferably obtained experimentally.

In this way, in the precision temperature control apparatus proposed by the present inventors so as to reduce the overlapping energy between the cooler 16 and the heater 14, the heating amount applied to the heater 14 as shown in FIG. And the cooling amount applied to the cooler 16, the rotational speed of the compressor 18 is controlled by the second control unit 22b via the inverter 19 serving as the rotational speed control means so as to reduce as much as possible the amount of heat that cancels each other out. Is controlled by.
9, the same members as those of the precise temperature adjusting device shown in FIG. 1 are given the same reference numerals as those in FIG. Omitted.

The second control unit 22b cooperates with the first control unit 22a for controlling the proportional three-way valve 20, and cancels each other out of the heating amount applied to the heater 14 and the cooling amount applied to the cooler 16. Precise temperature control of air flow while minimizing the minute.
The control of the proportional three-way valve 20 by the first controller 22a and the control of the rotational speed of the compressor 18 by the second controller 22b are shown in the flowchart of FIG.
When the temperature adjusting device shown in FIG. 9 was trial run, when operating on the cooling side with respect to the air flow, as the amount of heating applied to the heater 14, the first high temperature to the heater 14 side by the proportional three-way valve 20. It has been found that the heat medium distribution ratio is preferably 5 to 15% (the distribution ratio of the high temperature first heat medium to the cooler 16 side by the proportional three-way valve 20 is 95 to 85%) from the standpoint of stable operation. .
On the other hand, when operating on the heating side with respect to the air flow, the distribution ratio of the high-temperature first heat medium to the heater 14 side by the proportional three-way valve 20 is 95 to 85 as the heating amount applied to the heater 14 side. % (The distribution ratio of the high-temperature first heat medium to the cooler 16 side by the proportional three-way valve 20 is 5 to 15%) from the viewpoint of stable operation.

For this reason, in the control shown in the flowchart of FIG. 10, the amount of heating applied to the heater 14 side, specifically, the distribution ratio of the high-temperature first heat medium to the heater 14 side by the proportional three-way valve 20, When operating on the cooling side, the rotational speed of the compressor 18 is controlled so as to be 5 to 15%, and when operating on the heating side with respect to the air flow, the distribution ratio is 95 to 85%. Thus, the rotational speed of the compressor 18 is controlled.
In the flowchart shown in FIG. 10, after starting the compressor 18 in step S10, based on the temperature signal measured by the temperature sensor 24 provided in the space unit 10 so that the air flow is set to a predetermined temperature in step S12. Thus, the distribution ratio of the high temperature first heat medium distributed to the heater 14 side and the cooler 16 side by the proportional three-way valve 20 is continuously changed, and the air flow sucked into the space unit 10 is set to a predetermined temperature. adjust.

In step S14, it is determined whether the air flow reaches a predetermined temperature and is stable. If the temperature of the air flow is not stable, the process returns to step S12 and the heater 14 side and the cooler by the proportional three-way valve 20 are returned. The distribution ratio of the high-temperature heat medium distributed to the 16 side is continuously changed. Steps S12 and S14 are performed by the first controller 22a.
On the other hand, when the air flow in the space unit 10 reaches a predetermined temperature and is stable, the distribution ratio of the high-temperature first heat medium distributed to the heater 14 side in steps S16 to S22 is within a predetermined range. It is determined whether or not. Steps S16 to S22 are performed by the second controller 22b.
Note that since the distribution ratio of the high temperature first heat medium distributed to the heater 14 side varies with the average distribution ratio of the high temperature first heat medium shown in FIG. A value obtained by averaging the distribution ratio of the medium, and may be simply referred to as an average distribution ratio of the first heat medium.

First, in step S16 and step S18, when it is assumed that the air flow is on the cooling side, it is determined whether or not the average distribution ratio of the first heat medium to the heater 14 side is within 5 to 15%. To do.
Here, when the average distribution ratio of the first heat medium to the heater 14 side is within 5 to 15%, it is on the cooling side with respect to the air flow, and within the range where the operation of the precision temperature control device is stable. Therefore, it passes through step S16 and returns from step S18 to step S16.
On the other hand, when the average distribution ratio of the first heat medium to the heater 14 side is less than 5%, the average distribution ratio of the first heat medium to the heater 14 side is too low. Driving tends to be unstable. For this reason, in order to increase the average distribution ratio of the first heat medium to the heater 14 side, the process proceeds from step S16 to step S24, and the rotational speed of the compressor 18 is increased. In step S <b> 24, an increase signal for increasing the rotation speed of the compressor 18 set in the inverter 19 with a minimum change amount is transmitted from the second control unit 22 b to the inverter 19. This is because the precise temperature adjusting device can be stably operated by increasing the rotation speed of the compressor 18 with the minimum change amount.
The minimum change amount for changing the rotation speed of the compressor 18 is preferably determined experimentally because it varies depending on the precise temperature adjusting device. However, when the rotation speed of the compressor 18 is 2000 to 5000 rpm, the minimum change amount is preferred. The amount is preferably in the range of 3 to 10%.

When the average distribution ratio of the first heat medium to the heater 14 side exceeds 15%, it is determined that the air flow is not on the cooling side through steps S16 and S18. The process proceeds to S20 and step S22. In Step S20 and Step S22, when it is assumed that the air flow is on the heating side, it is determined whether or not the average distribution ratio of the first heat medium to the heater 14 side is within 95 to 85%.
Here, when the average distribution ratio of the first heat medium to the heater 14 side is within 85 to 95%, the air flow is on the heating side and the operation of the precision temperature control device is within a stable range. Therefore, it passes through step S20 and returns from step S22 to step S16.
On the other hand, when the average distribution ratio of the first heat medium to the heater 14 side exceeds 95%, the average distribution ratio of the first heat medium to the heater 14 side is too high, and the precision temperature adjusting device Driving tends to be unstable. For this reason, in order to reduce the average distribution ratio of the first heat medium to the heater 14 side, the process proceeds from step S20 to step S24, and the rotational speed of the compressor 18 is increased. In step S <b> 24, an increase signal for increasing the rotation speed of the compressor 18 set in the inverter 19 with a minimum change amount is transmitted from the second control unit 22 b to the inverter 19.

When the average distribution ratio of the first heat medium to the heater 14 side is less than 85%, in step S22, the air flow is applied to the heater 14 in a state that is neither the heating side nor the cooling side. Of the heating amount and the cooling amount applied to the cooler 16, it is determined that the amount of heat canceling each other is large. For this reason, it transfers to step S26 and the rotation speed of the compressor 18 is reduced. In step S <b> 26, a lowering signal is transmitted from the second control unit 22 b to the inverter 19 to reduce the rotation speed of the compressor 18 set in the inverter 19 with the minimum change amount. This is because the rotation speed of the compressor 18 is reduced by the minimum change amount and the air flow is shifted to the heating side or the cooling side.
Next, the process proceeds to step S28 after passing through step S24 or step S26, and it is determined whether or not the compressor 18 is in operation. If the compressor 18 is in operation, the process returns to step S14. In step S14, in step S24 or step S26, it is determined whether the air flow in the space unit 10 reaches a predetermined temperature and is stable in a state where the rotation speed of the compressor 18 is increased or decreased by the minimum change amount. . When the air flow in the space unit 10 reaches a predetermined temperature and is stable, the average distribution ratio of the first heat medium to the heater 14 side is within the predetermined range again in steps S16 to S26. Judge whether or not.

On the other hand, if it is determined in step S14 that the temperature of the air flow in the space unit 10 is not stable, the process returns to step S12, and the proportional three-way valve 20 distributes the heater 14 side and the cooler 16 side. 1 The distribution ratio of the heat medium is continuously changed. After the air flow in the space unit 10 reaches a predetermined temperature and stabilizes, the process proceeds to steps S16 to S26.
In step S28, when the compressor 18 is not in the operating state, the control by the first control unit 22a and the second control unit 22b is stopped.
As described above, in the first control unit 22a of the flowchart shown in FIG. 10 described above, control is performed by paying attention to the average distribution ratio of the first heat medium to the heater 14, but the first control to the cooler 16 side. You may control paying attention to the average distribution rate of a heat carrier.

1 to 10, the temperature adjustment target is an air flow, but the present invention can also be applied to a precision temperature adjustment device that uses a coolant used in a machine tool or the like as a temperature adjustment target. An example of the precise temperature adjusting device for the coolant as the temperature adjustment target is shown in FIG.
In the coolant precise temperature control apparatus shown in FIG. 11, the high-temperature first heat medium compressed by the compressor 50 controlled to rotate at a predetermined number of revolutions by the inverter 51 is a proportional three-way valve 52 serving as a distribution means. Is distributed to the heating channel and the cooling channel.
The proportional three-way valve 52 has a high-temperature first heat discharged from the compressor in which the total amount of the high-temperature first heat medium amount distributed to the heating flow path side and the high-temperature first heat medium amount distributed to the cooling flow path side is discharged. The high-temperature first heat medium compressed by the compressor 50 is proportionally distributed so as to be equal to the medium amount. The proportional three-way valve 52 is controlled by the first control unit 55a and, as will be described later, based on a signal from a temperature sensor 62 that measures the temperature of the coolant at the outlet of the precision temperature adjusting device, The distribution ratio of the high-temperature first heat medium distributed to the cooling flow path is continuously changed to adjust the coolant to a predetermined temperature.

  In the cooling flow path in which a part of the high temperature first heat medium discharged from the compressor 50 is distributed, the high temperature first heat medium is condensed as a cooling means for cooling the distributed high temperature first heat medium. A condenser 56, an expansion valve 58 as a first expansion means for adiabatically expanding and further cooling the first heat medium condensed by the condenser 56, and the cooled first heat medium are supplied. A cooler 60 is provided. The cooler 60 is supplied with a temperature adjustment target coolant returned from the USER stored in the storage tank 64 by the pump 66 and cooled. The first heat medium whose temperature is increased by absorbing heat with the cooler 60 returns to the accumulator 71 and is supplied to the compressor 50.

The heating channel is provided with a heater 54 as a heating means to which a high temperature first heat medium is supplied. The heater 54 is supplied with the coolant for temperature adjustment cooled by the cooler 60, adjusted to a predetermined temperature by the supplied high-temperature first heat medium, and sent to the USER.
A heat absorber 68 of a heat pump means is provided in the heating channel and the cooling channel. The heat absorber 68 is supplied with the first heat medium radiated and condensed by the heater 54 after being adiabatically expanded by the expansion valve 70 as the second expansion means and further cooled, and provided in the cooling flow path. Cooling water as the second heat medium that has been heated by absorbing the heat of the high-temperature heat medium is supplied by the condenser 56, and the first heat medium that has absorbed heat from the raised cooling water returns to the accumulator 71. Supplied to the compressor 50.

In the precise temperature control apparatus shown in FIG. 11, the condenser is arranged so that the pressure on the discharge side of the compressor 50 is kept constant in the middle of the piping of the cooling water as the second heat medium supplied to the condenser 56. A control valve 72 is provided as a cooling medium control means for controlling the amount of cooling water supplied to 56. The control valve 72 has the same structure as the control valve 40 shown in FIG. 2, and controls the discharge pressure of the compressor 50 to be constant.
That is, when the discharge pressure of the compressor 50 becomes a predetermined pressure or more, the opening degree of the valve portion provided in the cooling flow path of the control valve 72 increases, and the amount of cooling water supplied to the condenser 56 And the cooling capacity of the condenser 56 is improved. For this reason, the discharge pressure of the compressor 50 decreases. On the other hand, when the discharge pressure of the compressor 50 becomes a predetermined pressure or less, the opening degree of the valve portion provided in the cooling flow path of the control valve 72 becomes small, and the amount of cooling water supplied to the condenser 56 Decreases, and the cooling capacity of the condenser 56 decreases. For this reason, the discharge pressure of the compressor 50 becomes high.
In this way, by keeping the discharge pressure of the compressor 50 constant, the precise temperature adjusting device can be stably operated. Moreover, it can adjust so that the amount of cooling water may be supplied to the condenser 56 more than needed, and it may not discharge | emit out of the system.

By the way, when the temperature setting of the coolant is significantly increased, the first control unit 55a sets the discharge port on the cooling flow path side of the proportional three-way valve 52 to a fully closed state or a state close to the fully closed state, The discharge port on the side of the road is in a fully open state or a state close to the fully open state, and most of the high-temperature first heat medium is distributed to the heating channel side.
Further, when the coolant in the storage tank 64 is at a low temperature, the high temperature first heat medium supplied to the heater 54 in the heating channel is condensed with the low temperature coolant in the heater 54 and discharged from the compressor 50. Since the pressure becomes lower than the predetermined pressure, the control valve 72 is closed and the cooling water is not supplied to the condenser 56.
In this way, when the cooling water is not supplied to the condenser 56, the cooling water supplied from the condenser 56 to the heat absorber 68 constituting the heat pump means is also not supplied. For this reason, the heat absorber 68 is in an operation stop state, and the heat pump means does not function.
In addition, heat exchange between the first heat medium that has dissipated heat and condensed by the heater 54 is adiabatically expanded by the expansion valve 70 and further cooled, and the heat absorber 68 is frozen. There is a risk.

In this regard, in the precise temperature adjusting device shown in FIG. 11, a control valve 76 is provided in the bypass pipe 74 of the control valve 72 as means for supplying cooling water to the heat absorber 68. When the discharge port on the heating flow path side of the proportional three-way valve 52 is in a fully open state or a state close to a full open state (or the discharge port on the cooling flow path side is in a fully closed state or close to a fully closed state). It is opened by a signal from the first controller 55a, forcibly supplies cooling water to the condenser 56, and the heat absorber 68 is in an operating state.
For this reason, even when the distribution ratio of the high-temperature first heat medium distributed to the cooling flow path becomes zero or in the vicinity thereof, as in the case where the temperature setting of the coolant is significantly increased, the heat absorber 68 A predetermined amount of cooling water can be supplied, freezing of the heat absorber 68 can be prevented, and the function of the heat pump means can be exhibited.

When the discharge pressure of the compressor 50 increases and reaches a predetermined pressure, the control valve 76 is closed by a signal from the first control unit 55a. Thereafter, the supply amount of the cooling water supplied to the condenser 56 is controlled so that the pressure on the discharge side of the compressor 50 is kept constant by the control valve 72.
In the coolant precise temperature control apparatus shown in FIG. 11, two two-way gate valves 38 a and 38 b can be used instead of the proportional three-way valve 52, as shown in FIG. 5.
Further, in the precise temperature adjusting device for the coolant shown in FIG. 11, the cooling water is used as the second heat medium supplied to the condenser 56 and the heat absorber 68 of the heat pump means. However, as shown in FIG. 56 and the air flow by the fan 78 can be used as the second heat rejection medium supplied to the heat absorber 68 of the heat pump means. In the precise temperature control apparatus shown in FIG. 12, the first heat medium radiated by the heater 54 is adiabatically expanded by the expansion valve 70 as the second expansion means, and further cooled and supplied to the heat absorber 68 supplied to the fan 78. The air stream heated by being blown to the condenser 56 is blown by the above. For this reason, in the heat absorber 68, the 1st heat medium which thermally radiated and condensed by the heater 54, adiabatically expanded by the expansion valve 70, and cooled can absorb heat from an air flow.
In the precise temperature control apparatus shown in FIG. 12, when the constituent members are the same as the constituent members of the precise temperature control apparatus shown in FIG. 11, the same reference numerals as those in FIG. The explanation was omitted.

As described above, in the precision temperature adjustment apparatus shown in FIGS. 11 and 12, the second temperature is the same as that of the precision temperature adjustment apparatus shown in FIG. 9 so that the overlapping energy between the cooler 60 and the heater 54 can be reduced. You may make it control the rotation speed of the compressor 50 via the inverter 51 which provides a control part and controls the compressor 50. FIG. Again. In cooperation with the first control unit 55a, according to the flowchart shown in FIG. 10, while reducing the amount of heat that cancels each other out as much as possible between the amount of heating applied to the heater 54 and the amount of cooling applied to the cooler 60, Perform precise temperature control of the coolant to be adjusted.
In addition, the heaters 14 and 54, the coolers 16 and 60, the condensers 26 and 56, and the heat absorbers 32 and 68 used in the precise temperature control apparatus shown in FIGS. A known heat exchanger that flows as a flow or a parallel flow can be used. For example, a double tube, a finned tube, a plate heat exchanger, or the like can be suitably used.
In particular, when cooling water is supplied to the condensers 26 and 56 as the second heat medium, the operating temperature is a temperature range in which scale is likely to occur, and therefore, clogging is relatively difficult to occur. A double tube heat exchanger that performs heat exchange by flowing fluids having different temperatures between the tube and the outer tube can be suitably used.

On the other hand, as the heat absorbers 32 and 68 for which thermal efficiency is required, a plate heat exchanger in which a plurality of heat transfer tubes are inserted in a laminate in which a plurality of plate-like fins are stacked can be suitably used.
Furthermore, in the precise temperature control apparatus shown in FIGS. 1 to 12, the second heat medium supplied to the condensers 26 and 56 and the heat absorbers 32 and 68 is cooling water or air flow. Cooling water may be supplied to one of 56 and the heat absorbers 32 and 68, and an air flow may be supplied to the other.
Moreover, in the precise temperature control apparatus shown in FIGS. 1-12, in order to collect | recover part of the calorie | heat amount removed from the high temperature 1st heat medium with the condensers 26 and 56, the condensers 26 and 56 are used for the 2nd heat medium. It is supplied to the heat absorbers 32 and 68 via. However, depending on the flow rate of the second heat medium, the recovery may be hardly expected. In this case, the second heat medium may be individually supplied to each of the condensers 26 and 56 and the heat absorbers 32 and 68. Specifically, cooling water is individually supplied to each of the condensers 26 and 56 and the heat absorbers 32 and 68, or a cooling fan is provided for each of the condensers 26 and 56 and the heat absorbers 32 and 68. The air flow may be supplied individually.
The temperature adjustment target fluid and the second heat medium that can be applied in the present invention are not limited to air or water, but may be oil or a gas-liquid mixture.

10 Space unit 12, 46 Fan 14, 54 Heater 16, 60 Cooler 18, 50 Compressor 19, 51 Inverter 20, 52 Proportional three-way valve 22a, 55a First controller 22b Second controller 24, 62 Temperature sensor 26 , 56 Condensers 28, 58 First expansion valve 32, 68 Heat absorber 34, 70 Second expansion valve 36 Accumulator 40 Control valve 46 Fan

Claims (18)

A heating flow path comprising heating means to which a part of the high-temperature first heat medium compressed and heated by the compressor is supplied;
Condensing means to which the remaining portion of the high temperature first heat medium is supplied, and cooling means to which the first heat medium cooled by the condensing means is adiabatically expanded by the first expansion means and further cooled and supplied. A cooling flow path comprising:
The high temperature first heat medium is distributed to the heating flow path and the cooling flow path so that the temperature adjustment target fluid passing through the heating means and the cooling means is adjusted to a predetermined temperature, and the heating flow path A precision temperature control device in which the first heat medium that has passed through each of the cooling flow paths merges and is re-supplied to the compressor,
A portion of the high temperature first heat medium discharged from the compressor is distributed to the heating flow path side, and the remaining portion of the high temperature first heat medium is distributed to the cooling flow path side, and the heating flow path and A distribution means capable of changing a distribution ratio of the high-temperature first heat medium distributed to the cooling flow path;
The first heat medium, which is cooled by releasing heat by the heating means and then adiabatically expanded by the second expansion means and further cooled, includes heat absorption means for absorbing heat from the second heat medium as an external heat source. Heat pump means;
Controlling the distribution means, adjusting the distribution ratio of the high-temperature first heat medium distributed to the heating flow path and the cooling flow path, and adjusting the temperature adjustment target fluid that passes through the heating means and the cooling means. A first controller that controls to a predetermined temperature;
A rotation speed control means for controlling the rotation speed of the compressor is provided, and the distribution ratio of the high-temperature first heat medium controlled by the first control section is added to the fluid whose temperature is adjusted by the heating means. The rotational speed of the compressor is changed via the rotational speed control means so that a distribution ratio can be obtained in which the amount of heat canceling each other out of the amount and the cooling amount applied to the temperature adjustment target fluid by the cooling means is reduced. A precision temperature adjusting device, characterized in that a second control unit is provided.   The second control unit controls the rotation speed of the compressor via the rotation speed control means so that the distribution ratio of the high temperature first heat medium to the heating means or the cooling means is in the range of 5 to 15%. Item 2. The precise temperature control apparatus according to Item 1.   In the second control unit, when the distribution ratio of the high temperature first heat medium is the heating side where the fluid whose temperature is to be adjusted is heated, 95 to 85% of the high temperature first heat medium is distributed to the heating means and the remainder On the other hand, in the case of the cooling side where the temperature adjustment target fluid is cooled, the temperature of the first heat medium 95 is 95% of the high temperature first heat medium. The rotational speed of the compressor is controlled via the rotational speed control means so that ~ 85% is distributed to the cooling means and 5 to 15% of the remaining hot first heat medium is distributed to the heating means. The precise temperature control apparatus according to claim 1 or 2.   The precise temperature control apparatus according to any one of claims 1 to 3, wherein the rotation speed control means is an inverter.   The cooling medium that is supplied to the condensing means of the cooling flow path to cool the high temperature first heat medium and the second heat medium that is supplied to the heat absorbing means of the heat pump means are the same heat medium and are supplied to the condensing means The precision temperature control apparatus according to any one of claims 1 to 4, which is supplied to the heat absorption means after being performed.   The precision temperature control apparatus according to any one of claims 1 to 5, wherein the second heat medium is a second heat medium supplied without being heated or cooled from the outside.   Of the flow paths from the distribution means until the first heat medium is merged, each of the flow path including the cooling flow path and the flow path including the heating flow path and the heat pump means is provided independently as a flow path. The precision temperature control apparatus as described in any one of Claims 1-6.   The flow path including the heating flow path and the heat pump means is provided with heating means, the second expansion means and the heat absorption means, and the flow path including the cooling flow path is provided with the condensation means, the first expansion means and the cooling means. The precision temperature control apparatus according to claim 7.   The distribution means is a distribution means capable of substantially continuously changing the distribution ratio of the high-temperature first heat medium distributed to the heating flow path and the cooling flow path. Precision temperature control device.   In the distribution means, the total amount of the high temperature first heat medium distributed to the heating flow path side and the high temperature first heat medium distributed to the cooling flow path side is equal to the amount of the high temperature first heat medium discharged from the compressor. The precision temperature control apparatus according to any one of claims 1 to 9, wherein a proportional three-way valve that proportionally distributes the high-temperature first heat medium is used. The distribution means includes a branch pipe that branches the high-temperature first heat medium into the heating flow path side and the cooling flow path side, and a two-way valve provided in each of the branch pipes,
The first control unit adjusts a distribution ratio of the high-temperature first heat medium distributed to the heating flow path and the cooling flow path, and sets the temperature adjustment target fluid passing through the heating means and the cooling means to a predetermined temperature. And the total amount of the high temperature first heat medium distributed to the heating flow path side and the high temperature first heat medium distributed to the cooling flow path side is discharged from the compressor. The precise temperature adjusting device according to any one of claims 1 to 9, which is also a first control unit that adjusts the opening degree of each of the two-way valves so as to be equal to the amount.   The liquid medium for cooling the high-temperature first heat medium is supplied to the condensing means of the cooling flow path, and the liquid medium is supplied to the condensing means so that the pressure on the discharge side of the compressor is kept constant. The precision temperature control apparatus as described in any one of Claims 1-11 in which the refrigerant | coolant control means which controls the supply amount of is provided.   The cooling means and the heating means are arranged so that the fluid whose temperature is to be adjusted is an air flow, and the air flow reduced in humidity by being blown to the cooling means is blown to the heating means. The precision temperature control apparatus as described in any one of 1-12.   2. The heating means and the cooling means are arranged so that the fluid whose temperature is to be adjusted is an air flow, and the air flow heated to be heated by the heating means is blown to the cooling means. The precision temperature control apparatus as described in any one of -12. A heating flow path comprising heating means to which a part of the high temperature first heat medium compressed and heated by the compressor is supplied; a condensing means to which the remainder of the high temperature first heat medium is supplied; A cooling passage provided with a cooling means supplied by cooling the first heat medium cooled by the condensing means by adiabatic expansion by the first expansion means and further cooled, and a high temperature discharged from the compressor A part of the first heat medium is distributed to the heating flow path side, the remaining portion of the high temperature first heat medium is distributed to the cooling flow path side, and the high temperature is distributed to the heating flow path and the cooling flow path. A distribution means capable of changing a distribution ratio of the first heat medium, and a first heat medium that is cooled by releasing heat by the heating means and then adiabatically expanded by the second expansion means and further cooled, And a heat pump means having a heat absorption means for absorbing heat from the second heat medium as an external heat source. A precision temperature regulating device first heat medium having passed through each is resupplied to merge to the compressor of the heating channel and the cooling channel,
While adjusting the distribution ratio of the high-temperature first heat medium distributed to the heating flow path and the cooling flow path, while controlling the temperature adjustment target fluid passing through the heating means and the cooling means to a predetermined temperature,
The distribution ratio of the high-temperature first heat medium is a heat amount that cancels each other out of a heating amount applied to the temperature adjustment target fluid by the heating unit and a cooling amount applied to the temperature adjustment target fluid by the cooling unit. A precision temperature adjustment method, wherein the number of rotations of the compressor is changed so that the distribution ratio can be reduced.   16. The precision according to claim 15, wherein the rotational speed of the compressor is controlled via the rotational speed control means so that the distribution ratio of the high-temperature first heat medium to the heating means or the cooling means is in the range of 5 to 15%. Temperature adjustment method.   When the distribution ratio of the high-temperature first heat medium is the heating side that heats the fluid whose temperature is to be adjusted, 95 to 85% of the high-temperature first heat medium is distributed to the heating means, and the remaining high-temperature first heat medium On the other hand, in the case of the cooling side that cools the fluid subject to temperature adjustment, 95 to 85% of the high-temperature first heat medium is distributed to the cooling means. The rotational speed of the compressor is controlled via the rotational speed control means so that 5 to 15% of the remaining high-temperature first heat medium is distributed to the heating means. Precision temperature adjustment method.   The precise temperature control method according to any one of claims 15 to 17, wherein the rotation speed of the compressor is performed by an inverter.

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