JPS60117058A - Temperature regulating circuit device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature regulating circuit device, such as an air conditioner or a refrigeration device, which adjusts the room temperature a:X.

In general, as shown in FIG. 1, a temperature control device (air conditioning fi) includes a compressor 1. Four-way switching valve2. Outdoor heat exchanger 3. Aperture 4. A temperature adjustment circuit consisting of an indoor heat exchanger 5 and an accumulator 6 is provided.

When cooling with such a device, the four-way switching valve 2 is set to the state shown by the solid line in Fig. 1, and the discharge side of the compressor 1 is connected to the outdoor heat exchanger 3 as a condenser. 7 Indoor heat exchanger 5 using the suction side of the cumulator 6 as an evaporator
Connect to each. At this time, the refrigerant circulates as shown by the solid arrows in the figure.

That is, the refrigerant that has been pressurized by the compressor 1 to become a high-temperature, high-pressure gas is led to the outdoor heat exchanger 3 via the four-way switching valve 2, where it is condensed and becomes a high-temperature, high-pressure liquid.

The refrigerant that passes through the throttle 4 and becomes a low-temperature, low-pressure liquid enters the indoor heat exchanger 5 and evaporates there. At this time, cooling is performed by removing heat of evaporation from the indoor air and lowering its temperature.

Thereafter, the refrigerant is sucked into the compressor 1 again through the accumulator 6, and the above-mentioned cycle is repeated.

On the other hand, when performing heating with the above-mentioned device, the four-way switching valve 2 is switched as shown by the broken line, and the discharge side of the compressor 1 is connected to the indoor heat exchanger 5 as a condenser, and the suction side of the accumulator The sides are each connected to an outdoor heat exchanger 3 as an evaporator. At this time, the refrigerant circulates as shown by the dashed arrow, and contrary to the above-mentioned cooling case, the refrigerant condenses in the indoor heat exchanger 5 and gives its latent heat to the indoor air. The temperature rises and heating is performed.

Typically, an air conditioner such as a "duplex" is designed to have the ability to provide sufficient air conditioning at a load close to its maximum load. However, when looking at the entire cooling (heating) period, the proportion of time when the outside air temperature exceeds the maximum load is small, and most of the time the system is operated at an outside air temperature below the maximum load.

The relationship between outside air temperature and cooling load when cooling is performed to keep the room temperature constant is as shown in Figure 2, when the outside air temperature is 35°C.
If the maximum load A1 is reached at , and the cooling load at the average outside temperature during the cooling period (29°C in this example) is A, then ＼ is significantly smaller than A1, usually about half, It's below. Therefore, the second air conditioner, which has the capacity of maximum load AI, will have excessive capacity for most of the cooling period, causing the room temperature to drop excessively (
The problem arises that the amount of water is increased.

Therefore, conventionally, the room temperature is detected using a thermostat, and the detection signal is used to compress +! '11 ON-OF
F control is carried out to prevent the room temperature from dropping too much.

Fig. 3 is a graph showing the change in room temperature over time when ON-OFF control is performed using a thermostat. Indicates that cooling is stopped (compressor is stopped).

In addition, line A shows the control mode -r- when the thermostand setting value is 27°C and the thermodifferential is 4°C. In this case, the compressor stops when the room temperature drops to 25°C. As a result, the room temperature rose, and when it reached 29°C, cooling operation was restarted.

However, with this type of control, there is an uncomfortable zone (shaded area in the diagram) that exceeds the comfortable temperature range of 18°C to 28°C, so in many cases the thermostat is The set value is lowered.

Line B in Figure 3 is 26° by lowering the thermostat setting.
C, and the thermodifferential is set to 4°C as in the case described above. In this case, the uncomfortable zone is 1 The disadvantage is that the paper spreads during operation and energy consumption increases! i' occurs.

1- J) r, The relationship between the cooling load and the room temperature at a constant outside temperature is as shown in Figure 4, so
When the setting value of thermostat 1 is changed from 27°C to 26°C, the cooling load increases from line 1) to line E, and the pressure &il>9. This means that the time required to run the I will increase the amount of energy consumed during the spread. .

No. J, No.: (Line C in the diagram shows the setting value of thermostat 1 and 2.
'7 Y,', Lee modification ~, I
'C and ○N-01・1' system 1llll, the room temperature is 26.5°C and 2°7,5' (:
I'lq has been erased from the uncomfortable zone.

In this way, you can drive comfortably and efficiently.
1, all you have to do is make the Thermomod 7T lential smaller.

However, when reducing the thermodifferential, the number of times the compressor 1 starts and stops increases and the time interval becomes shorter, as shown in Figure 3.
Two important obstacles arise.

The first problem is restarting the compressor 1.

In other words, immediately after the compressor 1 is stopped, its discharge pipe is at high pressure and its suction pipe is at low pressure, and as the refrigerant flows from the high pressure side to the low pressure side, the pressures of both will eventually be equalized. Become so. Then, it takes a certain amount of time, usually about 3 minutes, to ensure that the pressure on the discharge side and suction side of Compressor 1 is equalized, and if the pressure is not equalized, restart Compressor 1. If you try to sleep, it will cause a startup problem,
Sometimes the reboot fails.

However, if the thermodifferential is made smaller, the interval between the start and stop of the compressor 1 becomes shorter, so the compressor 1 is in a state where the pressure on the discharge side and the suction side are not completely equalized, and there is a differential pressure. This creates a risk that the device will start up against the resistance, resulting in startup failure and failure to restart.

The second problem is heat loss caused by the start and stop of the compressor 1.

In other words, most of the refrigerant sealed in the refrigeration cycle exists in the cycle as a liquid, and during steady operation, most of the refrigerant is present in the cycle as a liquid.
It is present in the condenser (outdoor heat exchanger 3 during cooling), and exists as liquid cooling jL, especially in the pipe line from the center of the condenser to the constrictor 1)4.

When the air pressure &iB'J is stopped, the liquid refrigerant in the condenser (outdoor heat exchanger 3 during cooling) passes through the throttle 4 and flows into the evaporator (
During cooling, the liquid refrigerant flows toward the indoor heat exchanger 5), so that the liquid refrigerant of the flame 1' is present in the evaporator.

When the compressor 1 is restarted in such a refrigerant distribution state, when the liquid refrigerant in the evaporator flows into the accumulator 6, there is not enough liquid refrigerant in the condenser. Therefore, the amount of refrigerant supplied to the evaporator through the throttle 4 becomes extremely small. As a result, there is no external liquid refrigerant to evaporate in the evaporator, and even when the compressor 1 is started, the temperature of the air blown from the indoor heat exchanger 5 does not drop easily, and the temperature of the air blown out from the indoor heat exchanger 5 does not decrease until the cold air is blown out. There is a problem that it takes 3 minutes.

In such a conventional example, when the compressor 1 is restarted during cooling operation, changes in the air conditioning + air intake temperature, outlet temperature, and temperature at the center of the evaporator (indoor heat exchanger 5) are calculated. An example of actual measurement is shown in FIG.

In FIG. 5, the symbol G represents the temperature of the air intake air of the air conditioner.
The symbol H indicates the temperature of the blown air, and the symbol I indicates the temperature at the center of the evaporator (indoor heat exchanger 5).

Then, when the compressor 1 is restarted, the pressure inside the evaporator decreases, so the temperature of the evaporator temporarily decreases, but since the liquid refrigerant is not supplied from the condenser through the throttle 4, it is heated by the suction air. This shows a phenomenon in which the value increases and then decreases. For this reason, the blowing temperature 11 does not decrease even after restarting, and the blowing temperature 11 does not decrease even after restarting, and it takes 2
It takes ~:) minutes.

The heat loss caused by restarting the compressor 1 is as follows:
This increases with the number of times the compressor 1 is turned on and off, causing a significant drop in the annual energy efficiency of the air conditioner.

Note that such heat loss occurs in the same way as during heating.

In view of the above-mentioned circumstances, the temperature adjustment circuit device of the present invention reduces the heat loss that occurs when the compressor is restarted, and also reduces the pressure difference between the discharge pipe and suction pipe of the compressor when the compressor is restarted. The purpose of the present invention is to provide a temperature regulating circuit device that can frequently start and stop a compressor without causing any damage.

For this reason, the temperature adjustment circuit device of the present invention allows the working fluid to
A temperature adjustment circuit formed by sequentially connecting a compressor, a condenser, a throttle, and an evaporator to form a six-ring system is provided, and a temperature control circuit is provided in the middle of the pipe from the discharge side of the compressor to the condenser and the constrictor. A working fluid storage container capable of storing the working fluid is provided, and the working fluid storage container and the pipe line are connected to each other,
It is opened when the compressor is started in the above;
It is characterized by a "C" connection via an on-off valve that is closed at one time.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
6 and 7 show a temperature adjustment circuit device as a first embodiment of the present invention, FIG. 6 is a schematic diagram showing the overall configuration, and FIG. 7 is a diagram showing the discharge side pressure and suction (1111 FIG. 8 is a graph showing changes in pressure over time, and is a schematic diagram showing the overall configuration of a temperature iM adjustment circuit device as a second embodiment of the present invention.

First, a first embodiment of the present invention will be described. As shown in FIG. 6, a compressor 11. outdoor heat exchanger 13,
Aperture 14. Indoor heat exchanger 15 and accumulator 16
are connected in sequence to form a ring-shaped temperature adjustment circuit.

The arrows in the figure indicate the flow direction of the working fluid when cooling is performed by the above-mentioned temperature adjustment circuit.

Then, in the middle of the pipe line from the discharge side 11a of the compressor 11 to the throttle 14 via the condenser (outdoor heat exchanger 13) (in the middle of the pipe line connecting the outdoor heat exchanger 13 and the throttle 14 in this embodiment) A refrigerant storage container 17 capable of storing refrigerant is connected to a connecting pipe 19.
connected via.

An on-off valve 18 is inserted in the communication pipe 19, and this on-off valve 18 is opened when the compressor 11 is started, and the compression is performed once.
1 j and 1 i'i on the hour began to be used (・ru).

With the above-described configuration, when the compressor 11 is operated, the refrigerant circulates as shown by the solid arrow in the figure, and cooling is performed.

In other words, the high-temperature, high-pressure gaseous refrigerant that has been compressed (11) is
It is condensed in the outdoor heat exchanger 13 as a condenser 1j to become a high-temperature and high-pressure liquid, which is depressurized when passing through the throttle 14, enters the indoor heat exchanger 15 as an evaporator, and evaporates there. At this time, indoors! P air, Y1) Cooling is achieved by removing the heat of evaporation and lowering the temperature.

The refrigerant that has exited the internal heat exchanger 15 passes through the accumulator 16 and is sucked into the convex Ii:&ili exchange 1]. Since the soil is open, refrigerant 1
[;A high-temperature, high-pressure gaseous refrigerant enters the storage container 1''j, but the ambient temperature of the refrigerant storage container 17 is such that the high 1-1 force condensation fA?+ Because it is lower than the temperature
The cold water (W)-13 in the refrigerant storage container 17 is cooled by the surrounding air, and is completely liquefied to become a high-pressure liquid refrigerant.

When the compressor 11 is stopped from the above-mentioned state, the refrigerant on the high-temperature, high-pressure side including the outdoor heat exchanger] 3 flows into the low-pressure side of the indoor heat exchanger 15 through the throttle 14.

This movement of the refrigerant continues until the pressures on the high-pressure side and the low-pressure side are balanced.

However, since the on-off valve 18 is closed when the compressor 11 is stopped, the inside of the refrigerant storage container 17 is compressed! Even when the ++ is stopped, the ME maintains high pressure and is filled with high-pressure liquid refrigerant. (Refer to Fig. 7) Then, at the same time as the compression 8!11 is restarted, the on-off valve j
8 is released. At this time, the pressure in the high-pressure side of the refrigerant circuit from the discharge side of the compressor 11 to the throttle 14 is not sufficient because the compressor 11 has just been started, and the high pressure inside the refrigerant storage container 17 is of liquid refrigerant is forced into the refrigerant circuit. (See FIG. 7) Therefore, the liquid refrigerant that has been supplied to the refrigerant storage container 17 passes through the throttle 14 and is led to the indoor heat exchanger 15 where it absorbs the heat of evaporation from the indoor air. Even immediately after restarting, cold air continues to be blown out.

Furthermore, when the compressor 11 continues to operate, the refrigerant is stored? The vessel via is again filled with high pressure liquid refrigerant. 1) The opening/closing of the on-off valve 1)j can be performed automatically by detecting the operating state of the compression valve 1 or 11.

The second embodiment of the present invention shown in FIG. 1 is similar to the conventional example shown in FIG.
, the suction side 16i+ of the rotor 1G, the heat exchanger 13 and the indoor heat exchanger 1!3 are connected to the four-way switching valve 12,
By switching the four-way switching valve 12 as shown by the solid line, the compression 1iW++ 111 outlet side 11a or the outdoor heat exchanger 13
The suction side 16a of the accelerator and rotor 16 are connected to the indoor heat exchanger 15, and the discharge side 11a of the compressor 11 is connected to the outdoor heat exchanger 1 by switching as shown by the broken line.
3(r), the suction side of the rotor 16 is connected to the outdoor heat exchanger 13, respectively.

The conduit leading from the outdoor heat exchanger 13 to the indoor heat exchanger 15 is sequentially provided with a throttle 22 and a throttle 14.

In FIG. 8, solid line arrows indicate refrigerant circulation during cooling, and broken line arrows indicate refrigerant circulation during heating.

The throttle 22 has a check valve 21 that allows the flow of refrigerant to pass during cooling as described in 1. The throttle 14 has a check valve 20 that allows the flow of refrigerant to pass during heating as described in 1. It is set up.

Furthermore, a refrigerant storage container 17 is connected to the ζ pipe connecting the throttle 14 and the throttle 22 by a connecting pipe 19, and the connecting pipe 19 is opened when the compressor 11 is in operation. An on-off valve 18 that is closed when stopped is inserted.

- If the four-way switching valve 12 is switched as shown by the solid line in FIG. 8 and the compressor 11 is operated, 11J
Cooling is performed in the same manner as in the conventional example described above.

At this time, the refrigerant does not pass through the throttle 22 and instead passes through the check valve 22.
(), the refrigerant storage container 17 is communicated with the high pressure side as in the first embodiment, and the same functions and effects as in the first embodiment can be obtained.

When performing heating, the four-way switching valve 12 is switched to the position indicated by the dotted line in FIG. 8 to move the compressor J. At this time, the refrigerant circulates as indicated by the dotted arrow.

That is, the high-temperature, high-pressure gaseous refrigerant that exits the compressor 11 passes through the four-force cut-off jθ valve 12 and reaches the indoor heat exchanger J5, where it condenses to become a high-temperature, high-pressure liquid, which is then released. The latent heat increases by 1 and raises the temperature of the indoor air by -1 to perform heating.

Then, it passes through the reverse valve 21, is depressurized by the throttle 22, enters the outdoor heat exchanger 1;), and evaporates there. Furthermore, the refrigerant exiting the outdoor heat exchanger 1 passes through the four-way switching valve 12, the accumulator 16, and is sucked into the compressor 11.
i U' I: The above cycle is repeated.

And, Nirode, l-1:A11N>! During steady operation of the refrigerant storage container 17, the on-off valve 18 is open, so that high-temperature, high-pressure refrigerant in the form of a force enters the refrigerant storage container 17.

This gaseous refrigerant is further liquefied as it is cooled by the ambient temperature, so that the refrigerant storage container 7 is filled with high-pressure liquid refrigerant.

Then, when I stop Mii Iso 11,
The high-temperature, high-pressure refrigerant of the indoor heat exchanger 15 flows into the low-pressure side of the outdoor heat exchanger 13 through the throttle 22, and flows between the high-pressure side and the low rr.
, and the sides become balanced in terms of pressure.

On the other hand, since the opening/closing valve 18 is closed at the same time as the compressor 11 is stopped, the inside of the refrigerant storage container 17 is kept filled with high-pressure liquid refrigerant.

Thereafter, when the compressor 11 is restarted, the compressor is started in the circular direction because the pressures on the discharge side and suction side of the compressor are balanced.

Furthermore, since the on-off valve 18 is opened at the same time as the compressor 11 is restarted, the high-pressure liquid refrigerant in the refrigerant storage container 17 is
The refrigerant is pushed out into the refrigerant circuit, passes through the throttle 22, is supplied to the indoor heat exchanger 13, evaporates, and absorbs the heat of evaporation from the outdoor air.

Therefore, even immediately after the compressor 11 is restarted, the refrigerant in the outdoor heat exchanger 13 is actively evaporated, the amount of refrigerant circulated increases, and heating starts faster.

Then, when the compressor 11 continues to operate, iμJ of high-pressure liquid refrigerant is again supplied to the refrigerant storage container 17.

Below 1. As described in detail, according to the temperature regulating circuit device of the present invention, a compressor and a condenser are used to circulate the working fluid.

A temperature regulating circuit formed by sequentially connecting a throttle and an evaporator is provided, and in the middle of the pipe line from the discharge side of the compression rock to the condenser and the constrictor, there is a piece of working driftwood. A working fluid storage container is provided, and the working fluid storage container and the pipe line are opened when the compressor is started up, and the operation is stopped. With an extremely simple configuration in which the compressor is connected via an on-off valve that is closed when Advantage: 1 (1)

(]) Cooling (heating) 3) When the tlj is opened, 1) performance is affected.

(2) Energy loss due to starting and stopping of the compressor is reduced by the first term of i''+if.1゜(:I) According to pages 1 and 2J of 1iij, the temperature adjustment circuit device is turned on using a thermostand. -OF'ト'
When controlling, it becomes possible to set the differential to a small value.

(4) Comfortable temperature control is realized by the above-mentioned item 3.

[Brief explanation of the drawing]

Figures 1 to 5 show conventional temperature adjustment circuit devices. Figure 1 shows its overall configuration, and Figure 2 shows the relationship between outside air temperature and cooling load when keeping the room temperature constant using the device. The graph showing the relationship, figure f53, shows the device 0N-01"r'
A graph showing the change in room temperature over time under controlled conditions. Figure 4 shows the room temperature under a constant outside temperature. A graph showing the relationship between the cooling load of the equipment described in 1. Figure 5 shows the relationship between the cooling loads of the equipment after restarting the compressor. FIG. 6 is a graph showing the state of the apparatus described in item 1 of "1," and FIGS. 6 and 7 show a temperature adjustment circuit device as a first embodiment of the present invention. FIG. FIG. 7 is a graph showing changes over time in the discharge side pressure and suction side pressure of the compressor, and FIG. 8 is a schematic diagram showing the overall configuration of a temperature adjustment circuit device as an fjS2 embodiment of the present invention. . 11...Compressor, lla...Discharge side of compressor, ]2...
Four-way switching valve, 13... Outdoor heat exchanger, 14... Throttle, 1
5.Indoor heat exchanger, 16.Accumulator, ]Ga
... Suction side of the accumulator, 17... Refrigerant storage container,
1) (...open/close valve, 10...connection pipe, 20.21...reverse 11. valve, 22...throttle 1). "Sub-Agent Patent Attorney", Yoshihiko Iinuma Figure 2 Outside Air Temperature Figure 3 Time Figure 4 Room Temperature Figure 5 Temperature Figure 6 Figure 7 Procedural Amendment (Method) March 1980 6F Showa 5Σ; Special R'1' Application No. 224) 203
No. 2 Name of the invention Temperature adjustment circuit device 3 Relationship with the person making the amendment ilr f'l Applicant postal code + 00 11' Address 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Name (
620) Mitsubishi Type Nigyo Co., Ltd. 4 Fukudaikawa 1 Person History Number 1 f”+ 0 11 6-5-3 Minamimotomachi, Shinjuku-ku, Tokyo Full text of the specification subject to the amendment. 7 Details of the amendment. The entire text will be amended as shown in the attached sheet in order to make the font larger. 8. Specification for amendment of the full text of the list of attached documents (1 copy)

Claims (1)

[Claims] In order to circulate the working driftwood, a temperature adjustment circuit formed by sequentially connecting a compressor, a condenser, an aperture, and an evaporator is provided, and the pipe 1111 runs from the discharge side of the pipe through the condenser 1 to the aperture. A working fluid storage container capable of storing the working fluid is provided in the middle of the line, and the working fluid storage container and the pipe line 11 are opened when the compressor is started, and the pipe line 11 is opened when the compressor is started. A temperature regulating circuit device, characterized in that it is connected via an on-off valve that is closed when stopped.