JP2002081793A - Temperature regulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature regulator capable of controlling temperature of a load with a high accuracy in a wide range and reducing operation cost and equipment cost with saving energy in a temperature regulator for directly heating or cooling the load by guiding a heating medium directly to the load. SOLUTION: The temperature regulator comprises a heating medium circuit for cooling or heating the heating medium returning from the load to a specified temperature and supplying the medium to the load. The heating medium circuit is provided with a main circuit comprising a compressor, a water-cooled condenser and an expansion valve, and a control unit for controlling the heating medium at a specified temperature. The control unit controls temperature of the heating medium supplied to the load to a specified temperature, by controlling the number of rotations of the compressor that is being subjected to number-of-rotation control by using inverter power source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control device for setting a load temperature to a set temperature by cooling or heating the load with a temperature-controlled heat medium.

[0002]

2. Description of the Related Art Although a direct cooling type temperature control device for directly guiding a refrigerator refrigerant to a load has already been proposed, a conventional direct cooling type temperature control device has poor control accuracy at a constant temperature, and has a disadvantage in that the control accuracy is low. Even when the temperature changes, the actual temperature causes overshoot or undershoot before reaching the vicinity of the set temperature, and its temperature control is limited to about + -5 ° C. It is only possible to cool below room temperature. could not. Therefore, in order to accurately control the temperature of the load, a temperature control device of an indirect cooling type is generally used. FIG. 2 shows an example of a previously proposed indirect cooling type temperature control device.
A cooling circuit part 3 for cooling the refrigerant liquid whose temperature has risen in the load 2, and a load refrigerant liquid cooled by the refrigerant in the refrigeration circuit part 3 adjusted to a predetermined temperature and then supplied to the load 2. A refrigerant liquid circuit section 4 to be circulated and a control section 5 for controlling the temperature of the refrigerant liquid supplied to the load 2 are provided.

The refrigeration circuit section 3 includes a compressor 7 for compressing an appropriate refrigerant to produce a high-temperature and high-pressure refrigerant gas, a condenser 8 for cooling and condensing the refrigerant gas to produce a high-pressure liquid refrigerant, An expansion valve 9 for decompressing the refrigerant to lower the temperature and an evaporator 10 for evaporating the liquid refrigerant decompressed by the expansion valve 9 are sequentially connected in series. The expansion valve 9 controls the pressure of the refrigerant on the downstream side. The refrigeration circuit section 3
A reflux circuit 12 for returning the liquid refrigerant condensed in the condenser 8 from the outlet of the condenser 8 to the inlet of the compressor 7 when the outlet temperature of the evaporator 10 is high; And a temperature-type expansion valve 13.
The temperature is controlled by a temperature sensor 14 which detects the temperature of the refrigerant returned to the heater and outputs a signal.

[0004] The refrigerant liquid circuit section 4 includes a refrigerant liquid tank 2.
4, a heat exchanger 25 for cooling the refrigerant liquid whose temperature has increased in the load 2, a heater unit 26 having a heater 27 for heating the refrigerant liquid cooled in the heat exchanger 25 to a predetermined temperature, and a heater 27. A pump 28 for supplying and circulating the refrigerant liquid in the tank 24 adjusted to a predetermined temperature to the load 2 and a level switch 29 for detecting the level of the refrigerant liquid in the tank 24 are provided. The unit 26 and the pump 28 are both mounted on the tank 24. Further, on the outer periphery of the heater 27, a heater cover 3 surrounding the heater 27 and having a bottomed cylindrical shape and an upper opening is provided.
0 is provided. In the heat exchanger 25 in which the evaporator 10 of the refrigeration circuit section 3 is incorporated, a return pipe 32 for the refrigerant liquid returning from the load 2 is connected to an inlet, and a pipe 33 communicating with a lower portion of the heater cover 30 is connected to an outlet. Have been.

The supply pipe 3 connected to the discharge port of the pump 28
6 is provided with a temperature sensor 37 for detecting the temperature of the refrigerant liquid flowing in the pipe. On the bottom wall of the tank 24, a drain pipe 40 for discharging the refrigerant liquid in the tank 24 is provided. The control unit 5 controls the entire apparatus, and outputs a necessary signal in accordance with a temperature signal of the temperature sensor 37, a temperature controller 42, and a tank 24.
, A temperature controller 42 and a programmer logic controller 43 for outputting necessary signals in accordance with the signal of the level switch 29 in the inside.
And an electromagnetic contactor / electromagnetic switch 44 for controlling the operation of the compressor 7 and the pump 28 and the energization of the heater 27 in accordance with signals output from the controller 7 and an operation display panel 45 for displaying necessary information.

In the refrigerant liquid circuit section 4, when the refrigerant liquid whose temperature has risen due to the load 2 flows through the return pipe 32 through the heat exchanger 25, the refrigerant liquid flowing through the evaporator 10 has a low temperature. Of the heater cover 30
Flows into. Then, the refrigerant liquid heated to a predetermined temperature by the heater 27 flows out of the upper opening of the heater cover 30 into the tank 24, and this refrigerant liquid is supplied to the load 2 by the pump 28 to cool the load.

The temperature controller 1 cools the refrigerant liquid whose temperature has been raised by the load 2 by the heat exchanger 25 and heats the refrigerant liquid by the heater 27 to obtain a refrigerant liquid having a predetermined temperature. Temperature adjustment is easy. However, since the temperature control device 1 heats the refrigerant liquid cooled in the heat exchanger 25 by the heater 27, the amount of electric power required for operation increases. The heater 7, the pump 28, and the heater 27 may be energized at the same time. To cope with this, it is necessary to increase the allowable amount of energization to the temperature control device 1, and the equipment cost for energization also increases. .

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a temperature control device for directly cooling or heating a load by directly introducing a heat medium to the load, whereby the temperature of the load is accurately controlled over a wide range. It is an object of the present invention to provide a temperature control device that can save energy, reduce operating costs and equipment costs.

[0009]

In order to solve the above-mentioned problems, a temperature controller according to the present invention includes a heat medium circuit section that cools or heats a heat medium circulating from a load to a predetermined temperature and supplies the heat medium to the load. In the temperature control device, the heat medium circuit unit includes:
A main circuit section including a compressor, a water-cooled condenser, an expansion valve, and a pipe for connecting these devices in series to the load, and a control section for controlling a heat medium to a predetermined temperature by an inverter power supply; Wherein the control unit controls the temperature of the heat medium supplied to the load directly to a predetermined temperature by controlling the rotation speed of the compressor whose rotation speed is controlled by the inverter power supply. Is what you do.

In the temperature control apparatus of the present invention, it is preferable that the heat medium circuit section includes a hot gas circuit section having a control valve while bypassing the water-cooled condenser and the expansion valve. Further, in the temperature control device of the present invention, the control unit controls the opening degree of the expansion valve or the control valve,
It is suitable to directly control the temperature of the heat medium supplied to the load to a predetermined temperature, and further, the heat medium circuit section controls the temperature or pressure of the heat medium near the heat medium inlet or heat medium outlet of the load. The sensor has a sensor for detecting, the control unit, the difference between the temperature or pressure of the heat medium and the set temperature or set pressure detected by the sensor, the rotation speed of the compressor, the opening of the expansion valve, the control valve It is suitable to control the opening. Further, the temperature control device of the present invention has a control valve that allows the water-cooled condenser to adjust the flow rate of the cooling water, and the control unit includes:
It is suitable to control the temperature of the heat medium cooled by the water-cooled condenser by controlling the opening of the control valve. Further, in the temperature control device of the present invention, the heat medium circuit portion may include:
An evaporator circuit section including an expansion valve and a water heat exchange evaporator, and an evaporator bypass circuit section for bypassing the evaporator circuit section are provided between the heat medium outlet of the load and the compressor. Are suitable.

[0011]

[Function and Effect] The heat medium circulating from the load is compressed by a compressor whose rotation speed is controlled by an inverter power supply and becomes a high-temperature and high-pressure heat medium gas (hot gas). The high-temperature and high-pressure heat medium gas is a water-cooled condenser. The high-pressure heat medium liquid is cooled by the expansion valve, and the high-pressure heat medium liquid is expanded by an expansion valve to be a low-temperature low-pressure heat medium gas and supplied to the load. In the temperature control device of the present invention, the control unit provided in the heat medium circuit unit controls the pressure of the heat medium supplied to the expansion valve by controlling the rotation speed of the compressor whose rotation speed is controlled by the inverter power supply. The temperature of the heat medium supplied to the load is controlled directly to a predetermined temperature by controlling the flow rate and thereby controlling the cold generated by expansion by the expansion valve, so that the temperature of the load is accurately controlled. be able to. Further, in the temperature control device of the present invention, the control unit can control the opening degree of the expansion valve and the opening degree of the control valve provided in the hot gas circuit unit, thereby more accurately controlling the temperature of the load. can do.

Further, in the temperature control device of the present invention, the heat medium circuit unit has a sensor for detecting the temperature (or pressure) of the heat medium near the heat medium inlet or the heat medium outlet of the load, and the control unit includes the sensor. Since the rotation speed of the compressor, the opening of the expansion valve, and the opening of the control valve are controlled based on the difference between the temperature (or pressure) of the heat medium detected in step (1) and the set temperature (or set pressure), the load Can be quickly and accurately controlled to the set temperature. In addition, the temperature control device of the present invention has a water-cooled condenser that can adjust the flow rate of the cooling water, and can adjust the flow rate of the cooling water and has a larger heat capacity than the air-cooled condenser. Overshoot and undershoot of the actual temperature near the set temperature at the time of temperature change can be prevented.

Further, the temperature control device of the present invention can not only cool the load to control the temperature but also heat the load to control the temperature to a temperature higher than room temperature. To control the temperature of the load to a temperature higher than room temperature, hot gas is supplied to the load while controlling the flow rate by a control valve provided in the hot gas circuit unit, bypassing the water-cooled condenser and the expansion valve. An evaporator circuit section comprising an expansion valve and a water heat exchange evaporator between a heat medium outlet of a load and the compressor, and an evaporator bypass for bypassing the evaporator circuit section. Since the circuit portion is provided, heat for heating the load can be absorbed from the water heat exchange type evaporator by the principle of a heat pump. That is,
The hot gas after the temperature of the load is adjusted is expanded by the expansion valve to become a low-temperature heat medium gas and flows into the water heat exchange type evaporator. Heat is absorbed from water flowing through the evaporator by heat exchange, and the absorbed heat medium gas is sucked into the compressor.

When the temperature is controlled by cooling the load or when heating of the load is hardly necessary, it is not necessary to absorb heat from the water heat exchange type evaporator. It is drawn into the compressor through an evaporator bypass circuit section that bypasses the section. The temperature control device of the present invention
The load can be temperature-controlled not only by cooling but also by heating by directly introducing a temperature-controlled heat medium to the load. Since the heat is absorbed from the evaporator, the temperature of the load can be controlled over a wide range with high accuracy, energy can be saved, and operating costs and equipment costs can be reduced.

[0015]

FIG. 1 shows an embodiment of the present invention.
The temperature control device 51 includes a heat medium circuit unit 53 that cools or heats a heat medium returned from a load 52 to a predetermined temperature and supplies the heat medium to the load. Controlled compressor 54, water-cooled condenser 5
5, the expansion valve 71, and the load 5
2 is provided with a main circuit section 61 composed of a pipe connected to the control section 2 and a control section 70 for controlling the heat medium to a predetermined temperature. Further, the heat medium circuit section 53 includes the water-cooled condenser 55.
And a hot gas circuit section 62 having a control valve 72 while bypassing the expansion valve 71. The main circuit section 61 of the heat medium circuit section 53 includes an evaporator circuit comprising an evaporator expansion valve 73 and a water heat exchange evaporator 56 between the heat medium outlet 81 of the load 52 and the compressor 54. Part 6
3 and an evaporator bypass circuit 64 having a bypass valve 74 for bypassing the evaporator circuit 63.
The heat medium circuit section 53 includes the expansion valve 71, the load 52, the evaporator circuit section 63, and the evaporator bypass circuit section 6.
4 is provided with a bypass circuit section 65 having an expansion valve 75 for directly supplying the heat medium having passed through the condenser 55 to the compressor 54 while bypassing the condenser 55.

The main circuit section 61 of the heat medium circuit section 53
Since the compressor 54, the water-cooled condenser 55, and the expansion valve 71 whose rotation speed is controlled by the inverter power supply 90 are also devices constituting the cooling device, the main circuit 61 of the heat medium circuit 53 is It can be said that it constitutes a refrigeration cycle. The heating medium circuit section 53 includes a hot gas circuit section 6 having a control valve 72 in addition to the main circuit section 61.
2 and the evaporator circuit section 56 including the evaporator expansion valve 73 and the water heat exchange type evaporator 56, it can be used not only as a cooling device but also as a heating device. When the heating medium circuit section 53 functions as a cooling device, the control section 70 closes the evaporator expansion valve 73, opens the bypass valve 74 of the evaporator bypass circuit section 64, and returns the heating medium flowing back from the load 52. Flows into the compressor 54 through the evaporator bypass circuit section 64.

When the heating medium circuit section 53 is to function as a heating device, the control section 70 closes the bypass valve 74 of the evaporator bypass circuit section 64 so that the heating medium refluxed from the load 52 is supplied to the evaporator. Expansion valve 73 and evaporator 56
Through the compressor 54. FIG.
In the embodiment shown in FIG. 7, the bypass valve 74 is provided in parallel with the evaporator expansion valve 73, but instead of providing the bypass valve 74, the evaporator circuit section 63 upstream of the evaporator expansion valve 73 and the evaporator bypass In the part where the circuit part 64 branches,
A switching valve (not shown) that can be switched in three directions controlled by the control unit 70 is provided. The switching valve allows the heat medium flowing back from the load 52 to flow to the evaporator circuit unit 63, The heat medium may be prevented from flowing into the section 64 or by setting the switching valve to the closed position. The control unit 70 not only automatically controls devices such as the control valve 72, the evaporator expansion valve 73, the bypass valve 74, and the expansion valve 75, but also has a manual control changeover switch separately therefrom. By operating the changeover switch, these devices may be manually operated (for example, operated to a valve opening position or a valve closing position).

The bypass circuit section 65 includes the control section 7
0, the liquid refrigerant condensed in the condenser 55 is expanded by the expansion valve 75 when the temperature of the compressor 54 detected by the temperature sensor 79 is higher than a set value. Then, the temperature of the compressor 54 can be controlled to an appropriate temperature by the cold generated by the expansion. The operation of the present invention in the case where the heat medium circuit section 53 is used as a cooling device will be described. When the heat medium circuit unit 53 is used as a cooling device, the control unit 7
Since 0 closes the evaporator expansion valve 73 and opens the bypass valve 74, the heat medium flowing back from the load 52 passes through the evaporator bypass circuit section 64 to the compressor 54 whose rotation speed is controlled by the inverter power supply 90. The heat medium gas (hot gas) that has flowed in and has been compressed by the compressor 54 to a high temperature and a high pressure is supplied to a water-cooled condenser 55, and the heat medium cooled by the water-cooled condenser 55 is a high-pressure heat medium liquid The high-pressure heat medium liquid is expanded by the expansion valve 71 to generate cold heat, and is supplied to the load as a low-temperature heat medium.

The control unit 70 controls the pressure and flow rate of the heat medium supplied to the expansion valve 71 by controlling the rotation speed of the compressor 54 whose rotation speed is controlled by the inverter power supply 90. The temperature of the heat medium supplied to the load is controlled accurately with a predetermined temperature by controlling the cold generated by the expansion by the expansion valve 71. Also, the control unit 70 controls the opening degree of the control valve 72 provided in the expansion valve 71 and the hot gas circuit unit 62 to control the temperature of the heat medium supplied to the load 52 with high accuracy. I have. That is, in the prior art, in order to accurately control the temperature of the refrigerant that cools the load, the cooled refrigerant is heated again by the heater. However, in the temperature control device of the present invention, the control unit 70 controls the compression By controlling the rotation speed of the machine 54 and the opening of the expansion valve 71, the generation of cold heat is accurately controlled,
Further, when it is necessary to increase the temperature of the load 52, the control unit 70 controls the opening of the control valve 72 provided in the hot gas circuit unit 62, and the heat medium (the refrigerant ) Is mixed with hot gas and supplied to the load 52, so that the temperature of the heat medium supplied to the load 52 can be accurately controlled without using a heater.

The heat medium circuit 53 has a sensor 77 or 78 near the heat medium outlet 81 or the heat medium inlet 82 of the load 52 for detecting the temperature of the heat medium.
0 indicates the rotation speed of the compressor 54, the opening degree of the expansion valve 71, and the opening degree of the control valve 72 based on the difference between the temperature of the heat medium detected by the sensor 77 or 78 and the set temperature of the load (target temperature). Controlling. Since the heat medium in the heat medium circuit section 53 near the heat medium outlet 81 or the heat medium inlet 82 has a certain correlation between the temperature, the pressure, and the flow rate, instead of detecting the temperature of the heat medium, The pressure or the flow rate of the heat medium is detected, and the difference between the detected pressure or the flow rate and the set pressure or the set flow rate corresponding to the set temperature, the rotation speed of the compressor 54, the opening degree of the expansion valve 71,
The opening of the control 72 valve may be controlled.

In this embodiment, the sensor 77 or 78 for detecting the temperature of the heat medium is provided near the heat medium outlet 81 or the heat medium inlet 82 of the load 52 in the heat medium circuit 53. Sensor 77 or 78
Is not necessarily limited to this location,
For example, when there is a sensor for detecting the temperature or pressure of the heat medium in the load 52, the output of the sensor may be used. As the heat medium, a gas that easily liquefies, such as a low-boiling medium, is used. Specifically, R134a, which is known as a refrigerant of a refrigerator, is suitable, but is not necessarily limited to the heat medium. . As the compressor 54 whose rotation speed is controlled by the inverter power supply 90, a two-cylinder rotary compressor, a scroll compressor, or a helical blade compressor is suitable, but is not necessarily limited to these compressors. is not. In addition, the water-cooled condenser 5
5 has a control valve 83 capable of adjusting the flow rate of the cooling water, the opening of the control valve 83 being adjusted by the control unit 70 and controlling the temperature of the heat medium cooled by the water-cooled condenser 55. can do. Then, the expansion valves 71, 7
Since a pulse motor is used for driving the control valves 3 and 75 and the control valves 72 and 83, the valve opening can be controlled with high accuracy.

As described above, in the temperature control device 51 of the present invention, the control unit 70 controls the rotation speed of the compressor 54 whose rotation speed is controlled by the inverter power supply 90, the opening degree of the expansion valve 71, and the hot gas circuit unit. Since the degree of opening of the control valve 72 provided at 62 is controlled, the temperature of the load 52 can be quickly and accurately controlled to the set temperature. In addition to these controls, the temperature control device of the present invention has a water-cooled condenser 55 that can adjust the flow rate of the cooling water by the control valve 83, and can adjust the flow rate of the cooling water and can be used as an air-cooled condenser. Since the heat capacity is relatively large, it is possible to prevent overshooting and undershooting of the actual temperature near the set temperature when the set temperature changes. Further, the temperature control device of the present invention can not only cool the load to control the temperature but also heat the load to control the temperature to a temperature higher than room temperature.

The operation of the present invention in the case where the heating medium circuit section 53 is used as a heating device will be described. Heat medium circuit section 5
In order to use 3 as a heating device, the control unit 70 closes the expansion valve 71 and controls the water-cooled condenser 55 and the expansion valve 71 while controlling the flow rate of the hot gas from the compressor 54 with the control valve 72. Supply to the load 52 by bypass. Further, as described above, the control unit 70 closes the bypass valve 74 of the evaporator bypass circuit unit 64, and transfers the heat medium flowing back from the load 52 to the compressor through the evaporator expansion valve 73 and the evaporator 56. Since the heat flows into the heat pump 54, heat for heating the load 52 can be absorbed from the water heat exchange type evaporator 56 by the principle of a heat pump. That is,
The heat medium after the temperature of the load 52 is expanded by the expansion valve 73 to become a low-temperature heat medium gas and flows into the water heat exchange type evaporator 56. By exchanging heat with water flowing through the heat exchange type evaporator 56 to remove heat, heat is absorbed, and the absorbed heat medium gas is supplied to the compressor 54.
Sucked into.

If it is necessary to lower the temperature of the load 52 while controlling the temperature of the load 52 to be higher than room temperature,
The closed expansion valve 71 is opened for a short time to mix the cold gas generated by expansion with the hot gas, or the amount of water flowing into the water heat exchange type evaporator 56 by the control valve 84 controlled by the control unit 70. Or adjust the load to an appropriate temperature. Further, even when the load 52 is heated, if the amount of heat required for heating the load is small and it is not necessary to absorb heat from the water heat exchange type evaporator 56, the load 52
The heat medium flowing back from the compressor may be sucked into the compressor 54 through an evaporator bypass circuit 64 that bypasses the evaporator circuit 63.

As described above, the temperature control device of the present invention can control the load not only by cooling but also by heating.
In addition, when the temperature is controlled by heating the load, the temperature of the load can be controlled over a wide range by absorbing heat from the water heat exchange type evaporator 56 based on the principle of a heat pump. The set temperature of the load is, for example, -30 ° C to +
It can be controlled over a very wide range, such as 90 ° C. When the case where the temperature of the load is mainly controlled by cooling is called an A cycle, and the case where the temperature of the load is mainly controlled by heating is called a B cycle, the set temperature of the load is, for example, −30 ° C. to 0 ° C.
When the load is adjusted to a temperature sufficiently lower than the room temperature, the A cycle is used, and the load is adjusted to a temperature sufficiently higher than the room temperature such that the set temperature of the load is, for example, + 30 ° C. to + 90 ° C. In this case, the B cycle is used.

Also, if the set temperature of the load is, for example, 0 ° C. to +3
When the load is controlled to a temperature close to room temperature, such as 0 ° C., the A-cycle or the B-cycle is used. To select the A-cycle or the B-cycle, select a water-cooled condenser. Inflow water temperature (usually 20 ° C to 30 ° C)
° C) is relevant. In order to prevent hunting from occurring when switching between the A cycle and the B cycle, the temperature control device of the present invention provides a difference (10 ° C. to 20 ° C.)
Have. An empty pressure vessel (or vacuum pump) 86 with a check valve is connected via a valve 76 to a pipe of the main circuit portion 61 near the heat medium outlet 81 of the load 52. The pressure vessel 86 is a vessel for storing the gas remaining in the load 52 when the temperature controller 51 of the present invention is first connected to the load 52. After connecting the valve 51, the valves 73, 74
When the heat medium is first supplied to the load 52 by opening the valves 72 and 76, the gas remaining in the load 52 is extruded by the new heat medium and passes through the piping of the main circuit portion 61 and the valve 76. It is pushed into the pressure vessel 86.

[0027]

As described above in detail, the temperature control device of the present invention can directly control the load by heating as well as cooling by directly introducing a temperature-controlled heat medium to the load.
In addition, when the temperature is controlled by heating the load, heat is absorbed from the water heat exchange evaporator by the principle of a heat pump, so that the temperature of the load can be controlled accurately and over a wide range. Costs and equipment costs can also be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a temperature control device of the present invention.

FIG. 2 is a configuration diagram of an already proposed temperature control device.

[Explanation of symbols]

 51 Temperature control device 52 Load 53 Heat medium circuit unit 54 Compressor 55 Water-cooled condenser 56 Water heat exchange type evaporator 61 Main circuit unit 62 Hot gas circuit unit 70 Control unit 71 Expansion valve 72 Control valve

Claims (6)

[Claims] 1. A temperature control device comprising a heat medium circuit section for cooling or heating a heat medium refluxing from a load to a predetermined temperature and supplying the heat medium to the load, wherein the heat medium circuit section is controlled in rotational speed by an inverter power supply. A main circuit unit including a compressor, a water-cooled condenser, an expansion valve, and a pipe connecting these devices in series to the load, and a control unit that controls a heat medium to a predetermined temperature. Is a temperature control device, wherein the temperature of a heat medium supplied to a load is directly controlled to a predetermined temperature by controlling a rotation speed of a compressor whose rotation speed is controlled by the inverter power supply. 2. The temperature controller according to claim 1, wherein the heat medium circuit section includes a hot gas circuit section having a control valve while bypassing the water-cooled condenser and the expansion valve. apparatus. 3. The control unit according to claim 1, wherein the control unit controls the temperature of the heat medium supplied to the load to a predetermined temperature by controlling the degree of opening of the expansion valve and the control valve. The temperature control device according to claim 1 or 2. 4. The heat medium circuit section has a sensor for detecting the temperature or pressure of the heat medium near the heat medium inlet or heat medium outlet of the load, and the control section detects the heat medium detected by the sensor. 4. The method according to claim 1, wherein a rotation speed of the compressor, an opening of an expansion valve, and an opening of a control valve are controlled based on a difference between the temperature or the pressure and the set temperature or the set pressure. The temperature controller described in Crab. 5. The water-cooled condenser has a control valve capable of adjusting the flow rate of cooling water, and the control unit controls the opening of the control valve to control the heat cooled by the water-cooled condenser. The temperature control device according to claim 1, wherein the temperature control device controls a temperature of the medium. 6. An evaporator circuit section comprising an expansion valve and a water heat exchange type evaporator between a heat medium outlet of a load and the compressor, and bypassing the evaporator circuit section. The temperature control device according to claim 1, further comprising an evaporator bypass circuit section.