JPH07310946A - Refrigerant heating type cooler/heater - Google Patents

Abstract

PURPOSE:To obtain a low-cost refrigerant heating type cooler/heater which has the excellent stability of a refrigerating cycle and can increase or decrease the heating capacity. CONSTITUTION:A gas burner 13 and a combustion fan 16 are so controlled that the number of revolutions of an indoor fan 31 is increased or decreased and (the temperature Th2-Th1 to be detected by a temperature sensor 26) is maintained at the predetermined value to be decided based on the amplitude of the temperature Th1 to be detected by the sensor 26 when the heating capacity is increased or decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant heating type cooling and heating apparatus for heating a refrigerant during heating operation.

[0002]

2. Description of the Related Art As shown in FIG. 1, a compressor 1 → outdoor unit heat exchanger 7 → first check valve 8 → capillary tube 9 → indoor unit heat exchanger 3 → second check valve 10 → Accumulator 6
→ The refrigerant is circulated in the order of the compressor 1 to perform the cooling operation,
BACKGROUND ART Refrigerant heating type cooling and heating devices that perform heating operation by circulating a refrigerant in the order of compressor 1 → indoor unit side heat exchanger 3 → refrigerant heater 5 → accumulator 6 → compressor 1 have been conventionally known. The heating capacity is increased / decreased by continuously changing the compression capacity of the compressor 1 and changing the refrigerant flow rate.

[0003]

The conventional refrigerant heating type cooling and heating apparatus has the following problems. (A) In order to prevent problems such as damage to the compressor 1 or damage to the refrigerant heater 5, it is necessary to adjust the compression capacity of the compressor 1 to stabilize the refrigeration cycle, and complicated control is required. .

(Ii) In order to continuously change the compression capacity of the compressor 1, it is necessary to continuously change the rotation speed by using an inverter circuit. The inverter circuit requires a large number of expensive electronic parts, and it is necessary to take measures against noise leakage, distortion of power supply waveform (harmonic), and the like, which is costly.

An object of the present invention is to provide a low-cost refrigerant heating type cooling and heating apparatus which is excellent in the stability of the refrigeration cycle and whose heating capacity can be increased or decreased.

[0006]

In order to solve the above problems, the present invention employs the following configurations. (1) The refrigerant flowing out from the indoor unit side heat exchanger is sent to the refrigerant heater, the refrigerant is evaporated in the refrigerant heater heated by the heating means, and the gas refrigerant carried out from the refrigerant heater operates with a constant capacity. A high-temperature high-pressure gas refrigerant that is adiabatically compressed by a compressor and discharged from the compressor is condensed in an indoor unit side heat exchanger to radiate heat indoors to perform heating operation. A second temperature sensor for detecting a temperature Th ₂ of a refrigerant in a superheated vapor state, wherein a first temperature sensor for detecting a temperature Th ₁ of a refrigerant in a saturated state is arranged midway in the pipeline of the refrigerant heater. When the heating capacity is increased / decreased by arranging it from the outlet of the refrigerant heater to the inlet of the compressor, the amount of air blown by the indoor fan is increased.
The heating amount of the heating means is controlled so that the temperature Th ₂ −the temperature Th ₁ is maintained at a predetermined value while the temperature is reduced.

(2) The refrigerant flowing out of the indoor unit side heat exchanger is sent to the refrigerant heater, the refrigerant is evaporated in the refrigerant heater heated by the heating means, and the gas refrigerant carried out from the refrigerant heater is compressed by the compressor. Adiabatic compression of the high temperature and high pressure gas refrigerant discharged from the compressor is condensed in an indoor unit side heat exchanger equipped with an indoor fan whose air flow rate can be changed to radiate heat indoors for heating operation. A refrigerant heating type heating and cooling apparatus, wherein a first temperature sensor for detecting a refrigerant temperature Th ₁ in a saturated state is arranged midway in the pipeline of the refrigerant heater to detect a temperature Th ₂ of the refrigerant in a superheated vapor state. A state in which a temperature sensor is arranged between the outlet of the refrigerant heater and the inlet of the compressor, and the compressor is operated at a constant capacity so that the temperature Th ₂ −the temperature Th ₁ is maintained at a predetermined value. And, each heating amount set according to the air flow rate Wherein the refrigerant flow operation for actuating the heating means, for alternately performed between the refrigerant stops operation to stop the operation of at least the heating means.

(3) The refrigerant heating type air conditioner has the structure of (1) above, and includes a temperature setter for setting the target room temperature, a room temperature sensor for detecting the room temperature, and a difference between the target room temperature and the detected room temperature. Based on the above, the heat dissipation amount calculation means for calculating the necessary heat amount to be released by the indoor unit side heat exchanger in the refrigerant condensing step, and the blown air amount of the indoor fan based on the calculated necessary heat amount are determined, Indoor fan control means for controlling the indoor fan so as to obtain the air volume, and temperature Th ₂ −temperature T
A heating capacity control means for controlling the heating amount of the heating means is provided so that h ₁ is maintained at a predetermined value.

(4) The refrigerant heating and cooling apparatus has the configuration of (2) above, and the temperature setter for setting the target room temperature, the room temperature sensor for detecting the room temperature, and the detected room temperature are maintained at the target room temperature. Similarly, the timing control means for controlling the operation timing and time of the refrigerant stop operation, and the temperature Th ₂ −the temperature T
A heating amount control means for controlling the heating amount of the heating means during the refrigerant circulation operation is provided so that h ₁ is maintained at a predetermined value.

[0010]

[Action]

[Claim 1] The compressor compresses the gas refrigerant carried out from the refrigerant heater, the temperature and pressure of the refrigerant rise due to adiabatic compression, and the gas refrigerant is displaced from the state of Fig. 9 to a state along the isentropic line. However, the enthalpy increases slightly (adiabatic compression process).

The high-temperature and high-pressure gas refrigerant discharged from the compressor is displaced from the state shown in FIG. 9 to a state along the isothermal isobar, and is condensed in the indoor unit side heat exchanger, and the indoor unit side heat exchanger is condensed. The generated heat is radiated indoors (refrigerant condensing step).

The refrigerant flowing out of the indoor unit side heat exchanger is displaced from the state shown in FIG. 9 to a state along the isenthalpy line and sent to the refrigerant heater (refrigerant depressurizing step).

The refrigerant evaporates in the refrigerant heater heated by the heating means, is displaced from the state of FIG. 9 to a state along the isothermal isobar, and the enthalpy of the refrigerant increases (refrigerant evaporation step).

The heating capacity is increased / decreased as follows. When the amount of air blown by the indoor fan is increased and the heating amount of the heating means is controlled so that the temperature Th ₂ −the temperature Th ₁ is maintained at a predetermined value while the capacity of the compressor is maintained constant, in the refrigerant evaporation step Both the change width of the enthalpy of the refrigerant and the amount of heat radiated to the room of the indoor unit side heat exchanger in the refrigerant condensing process increase, and the heating capacity increases (state → state → state → state → state).

Further, in a state where the capacity of the compressor is maintained constant, the amount of air blown from the indoor fan is reduced to a predetermined value determined based on the magnitude of the refrigerant temperature Th ₁ , the temperature Th ₂ -the temperature Th _1. If the heating amount of the heating means is controlled so as to maintain, the variation width of the enthalpy of the refrigerant in the refrigerant condensing step and the amount of heat radiated to the room of the indoor unit side heat exchanger are both small, and the heating capacity is reduced ( Status → Status → Status '→ Status' → Status ………).

[Claim 2] In the case of the refrigerant heating type cooling and heating apparatus in which the blowing amount of the indoor fan is fixed, the heating capacity is increased or decreased as follows. While maintaining the capacity of the compressor constant, the heating means operates at each heating amount set according to the air flow rate (constant value set for each air flow rate), and the high temperature and high pressure gas refrigerant is supplied to the indoor unit side. The heat is condensed in the heat exchanger, and the indoor unit side heat exchanger radiates heat to the room.

At least the operation of the heating means is stopped so that the temperature Th ₂ −the temperature Th ₁ is maintained at a predetermined value.

[Claim 3] The heat radiation amount calculation means is
Based on the difference between the target room temperature set by the temperature setter and the detected room temperature detected by the room temperature sensor, the indoor unit side heat exchanger calculates the necessary amount of heat to be released in the refrigerant condensing step.

The indoor fan control means determines the amount of air blown by the indoor fan in accordance with the calculated required heat amount, and controls the indoor fan so as to obtain the amount of air blown. Heating capacity control means, the temperature Th ₂ - As the temperature Th ₁ is maintained at a predetermined value, controls the heating amount of the heating means. As a result, the heating operation is performed so that the room temperature is maintained at the target room temperature.

[Claim 4] The timing control means controls the operation timing and time of the refrigerant stop operation based on the difference between the target room temperature set by the temperature setting device and the detected room temperature detected by the room temperature sensor.

The heating capacity control means has a temperature of Th ₂ −temperature T.
The heating capacity of the heating means during the refrigerant circulation operation is controlled so that h ₁ is maintained at a predetermined value. As a result, the heating operation is performed so that the room temperature is maintained at the target room temperature.

[0022]

【The invention's effect】

[Claim 1] When the heating capacity is increased / decreased, the amount of air blown from the indoor fan is increased / decreased, and the heating amount of the heating means is maintained so that the temperature Th ₂ −refrigerant temperature Th ₁ is maintained at a predetermined value. Can be controlled, and the refrigeration cycle can be stabilized with simple control.

Since the compressor is always operated with a constant capacity, an inverter circuit for continuously varying the amount of electricity supplied to the compressor is unnecessary. Therefore, it is not necessary to use expensive electronic parts, and it is not necessary to take measures against noise leakage, distortion of power supply waveform (harmonic), and the like, so that it is possible to manufacture at low cost. Further, since the refrigerant is constantly flowing with a predetermined flow rate at a predetermined speed, the heating starts up well and the responsiveness when changing the heating capacity is excellent.

[Claim 2] When the heating capacity is increased or decreased, at least the refrigerant stop operation time for stopping the operation of the heating means is controlled so that the temperature Th ₂ −the temperature Th ₁ is maintained at a predetermined value. In the refrigerant heating type cooling and heating apparatus in which the amount of air blown from the indoor fan is fixed, the refrigeration cycle can be stabilized by simple control.

Since the compressor is either stopped or operated with a constant capacity, an inverter circuit for continuously varying the amount of electricity to the compressor is not required. Therefore, it is not necessary to use expensive electronic parts, and it is not necessary to take measures against noise leakage, distortion of power supply waveform (harmonic), and the like, so that it is possible to manufacture at low cost. Further, during the refrigerant circulation operation, since the refrigerant is made to flow at a predetermined flow rate at a predetermined rate, the heating starts up well and the responsiveness when the heating capacity is changed is excellent.

[Claim 3] When the user sets the target temperature with the temperature setting device, the amount of air blown by the indoor fan is determined and the heating means is heated so that the temperature Th ₂ −the temperature Th ₁ is maintained at a predetermined value. The heating operation can be performed such that the amount is controlled and the room temperature is maintained at the target temperature.

[Claim 4] When the target temperature is set by the temperature setter and the air flow rate of the indoor fan is determined by the user,
The heating operation is performed so that the timing control means controls the operation time and time of the refrigerant stop operation to maintain the detected room temperature at the target room temperature. Further, heating capacity control means temperature Th ₂ - the temperature Th ₁ controls the heating amount of the heating means so as to be maintained at a predetermined value the refrigeration cycle is stabilized.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The refrigerant heating type gas cooling and heating apparatus A adopting the configuration of the present invention is configured by connecting the respective functional members with piping as shown in FIG. 1, and includes a compressor 1, a four-way valve 2 and an indoor unit side heat exchange. Unit 3 → 2-way valve 4 → Refrigerant heater 5 → Accumulator 6 →
The refrigerant (CFC R22) is circulated in the order of the compressor 1 to perform the heating operation, and the compressor 1 → the four-way valve 2 → the outdoor unit side heat exchanger 7 → the first check valve 8 → the capillary tube 9 → the indoor unit side heat The refrigerant is circulated in the order of the exchanger 3 → the four-way valve 2 → the second check valve 10 → the accumulator 6 → the compressor 1 to perform the cooling operation.

Further, 31 is an indoor fan for blowing air to the indoor unit side heat exchanger 3, 71 is an outdoor fan for blowing air to the outdoor unit side heat exchanger 7, and 11 is a check valve. Further, 12 is a two-way valve which is “closed” during the cooling operation, and is “open” when the compressor 1 is stopped during the heating operation and when the low pressure is 17 kgcm ² G or more.
3 is a gas burner, 14 is a proportional solenoid valve, 15 is a pressure switch, and 16 is a combustion fan.

Further, the refrigerant heating type gas cooling and heating apparatus A is
As shown in FIG. 2, a temperature setter 21 for setting a target room temperature
A control including a room temperature sensor 22 for detecting a room temperature, a heat radiation amount calculation means 231, an indoor fan control means 232, a timing control means 233, a combustion fan control means 235 constituting a heating capacity control means 234, and a proportional valve control means 236. The air conditioner 23, the operation mode switching device 24, the air volume manual switching device 25, the temperature sensors 26 and 27, and the memory 28 are provided.

The compressor 1 is a rotary type having sliding blades, is driven by an AC electric motor (power consumption, several hundred W to several kW) supplied with AC-100V, and is sent from an accumulator 6. Adiabatically compress the refrigerant.
The compressor 1 may be a scroll type or a reciprocating type.

The four-way valve 2 is an electromagnetic valve for switching the flow path of the refrigerant. During the heating operation, the flow path of the refrigerant is formed as shown by the solid line in FIG. 1, and during cooling operation, the flow path is formed as shown by the broken line. To be done.

The indoor unit side heat exchanger 3 is a meandering pipe having fins and the like blown by the indoor fan 31, and is arranged in an indoor unit (not shown) installed in the room.
It is connected to an outdoor unit (not shown) installed outdoors by a refrigerant pipe. The flow direction of the refrigerant is opposite between the heating operation (the solid arrow direction in FIG. 1) and the cooling operation (the broken arrow direction).

The two-way valve 4 is an electromagnetic valve that opens during heating operation and closes during cooling operation, and is arranged so that refrigerant does not flow into the refrigerant heater 5 during cooling operation.

The refrigerant heater 5 is an endothermic tube arranged in a meandering shape, is arranged in an outdoor unit (not shown) installed outdoors, and is heated by combustion gas generated by combustion of the gas burner 13. Gas burner 13 (3000 kcal / h ~
10000 kcal / h), the gas of which the gas amount is set by the gas proportional valve 14 and the combustion air supplied by the combustion fan 16 are mixed and combusted compulsorily.

Further, as shown in FIGS. 1 and 3, the temperature sensor 26 is arranged in the pipeline of the refrigerant heater 5 in which the refrigerant is always saturated, and the refrigerant is always in the superheated vapor state. 5
A temperature sensor 27 is arranged in the conduit from the outlet of the accumulator to the accumulator 6.

The accumulator 6 has a straight tubular refrigerant gas inlet pipe and a substantially U-shaped refrigerant gas outlet pipe having an opening at the top, which is disposed in an airtight container, and enters the liquid refrigerant compressor 1. Is arranged in front of the compressor 1 in order to prevent the invasion of the compressor.

Next, the operation of each part and the state change of the refrigerant in the heating operation of the gas cooling and heating apparatus A (the state change of the refrigerant corresponds to the air volume 7th speed in the air volume manual heating operation described later) will be described.

Since the compressor 1 adiabatically compresses the gas refrigerant (superheated vapor state) sent from the accumulator 6,
The temperature and pressure of the refrigerant rise, the gas refrigerant (superheated vapor state) is displaced from the state 17 in FIG. 4 to the state 18 (superheated vapor state) along the isentropy line, and the enthalpy slightly increases.

The gas refrigerant in the state 18 discharged from the compressor 1 passes through the four-way valve 2 and is condensed in the indoor unit side heat exchanger 3 blown by the fan 31 (superheated steam → saturated state → supercooled liquid). The state is changed to state 19, and at this time, the indoor unit turns the heat generated by condensation into warm air and blows it into the room.

Since the liquid refrigerant flowing out of the indoor unit side heat exchanger 3 is decompressed in the pipeline, it is in the state 19 (supercooled liquid state).
State 20 (on the saturated liquid line) along the kara isenthalpy line
To the refrigerant heater 5 through the two-way valve 4.

In the refrigerant heater 5 heated by the gas burner 13, the liquid refrigerant (saturated state) evaporates and is displaced from the state 20 to the state 17 (superheated vapor state) along the isothermal isobar.
The enthalpy of the refrigerant increases.

The refrigerant in the state 17 (superheated vapor state) is sent to the compressor 1 via the accumulator 6.

Next, the operation of the gas cooling and heating apparatus A in the automatic air volume heating operation (air volume 1st speed-8th speed) and the air volume manual heating operation (air volume 1st speed, 4th speed, 7th speed fixed) will be described.

[Air volume automatic heating operation (for air volume 1st speed to air volume 8th speed; corresponding to claims 1 and 3)] Operation mode selector 2
4, when the air volume automatic heating operation (with temperature adjustment) is set, the heat radiation amount calculating means 231 determines that the indoor unit side heat exchanger 3 is based on the temperature difference (Tt-Tn) between the target room temperature Tt and the detected room temperature Tn. The required heat quantity Q to be released in the refrigerant condensing step (corresponding to state 18 → state 19 in FIG. 4) is calculated every predetermined time τ (for example, 1
Every minute).

The indoor fan control means 232 determines the number of airflow levels (fan rotation speed) of the indoor fan 31 in every predetermined time τ (for example, every 1 minute) in proportion to the calculated required heat amount Q, and the level is determined. The indoor fan 31 is feedback-controlled so that a number of air volumes can be obtained. Fan air flow rate = κ · Q (where κ is a coefficient) Incidentally, in order to cope with the clogging of the filter, an energization amount control method of energizing at an energization amount that can obtain a predetermined air flow rate may be used.

The memory 28 stores the temperature Th _{1 for} each temperature Th _1.
The predetermined value (temperature difference) corresponding to ₁ is stored in advance,
The heating capacity control means 234 reads this predetermined value every predetermined time τ, and the proportional valve control means 236 and the combustion fan control means 235 proportionally maintain (temperature Th ₂ −temperature Th ₁ = predetermined value). Opening degree of solenoid valve 14 and combustion fan 1
Control the number of rotations of 6.

Specifically, as shown in FIG. 5, the target room temperature T
At the beginning of the heating operation in which the temperature difference (Tt−Tn) between t and the detected room temperature Tn is large, the indoor fan control unit 232 determines that the air volume of the indoor fan 31 is set to the 8th speed, and the combustion fan control unit 235 determines the combustion fan 16. Decided to set the air volume of 8 to
The proportional valve control means 234 sets the combustion speed of the gas burner 13 to 8
The speed is determined (combustion amount = 10000 kcal / h).

As time passes, the target room temperature Tt and the detected room temperature T
As the temperature difference (Tt-Tn) from n decreases, the air volume of the indoor fan 31, the air volume of the combustion fan 16, and the combustion speed of the gas burner 13 decrease.

[Air volume manual heating operation (air volume 1st speed, 4th speed, 7th
Speed: Corresponding to claims 2 and 4)] The air volume manual heating operation (with temperature control) is set by the operation mode switch 24, and the air volume is switched to the predetermined air volume (air volume 1st speed, 4th speed, When fixed to any of the 7th speed), the heating control means 234 alternately performs the refrigerant circulation operation and the refrigerant stop operation.

The timing control means 233 controls the heating capacity control means 234 so that the detected room temperature Tn is maintained at the target room temperature Tt, and increases or decreases the operation timing and duration of the refrigerant stop operation.

The memory 28 stores the temperature Th _{1 for} each temperature Th _1.
The predetermined value (temperature difference) corresponding to ₁ is stored in advance,
The heating capacity control means 234 reads out this predetermined value for every predetermined time τ, and the proportional valve control means 236 and the combustion fan control means 235 keep the (temperature Th ₂ −temperature Th ₁ = predetermined value) during the refrigerant circulation operation. Proportional solenoid valve 14 so that it is maintained
And the rotation speed of the combustion fan 16 are controlled.

Specifically, as shown in FIG. 6, when the air volume of the indoor fan 31 is fixed to 7th speed (strong wind), the target room temperature T
At the beginning of the heating operation in which the temperature difference between t and the detected room temperature Tn is large, the timing control unit 233 continues the refrigerant circulation operation, and the gas burner is maintained so that (Temperature Th ₂ −Temperature Th ₁ = predetermined value) is maintained. The proportional valve control means 236 and the combustion fan control means 235 control so that 13 burns (for example, a combustion speed of 7) and the combustion fan 16 rotates at a high rotation speed suitable for the combustion speed of 7.

When the temperature difference between the target room temperature Tt and the detected room temperature Tn becomes small with the passage of time, the timing control means 233 causes the timing control means 233 to perform a short-time refrigerant flow operation (gas burner 13).
(Combustion speed of 7 is, rotation speed of combustion fan 16 is 7)
And the refrigerant stop operation for a relatively long time are alternately performed.
Further, during the refrigerant circulation period, the gas burner 13 burns (for example, the combustion speed is 7) so that the (temperature Th ₂ −temperature Th ₁ = predetermined value) is maintained, and the combustion fan 16 reaches the combustion speed. Proportional valve control means 236 so as to rotate at a suitable high rotation speed
And the combustion fan control means 235 controls.

Further, as shown in FIG. 7, the wind of the indoor fan 31
When the amount is fixed to 1st speed (light breeze), the target room temperature Tt is detected.
At the beginning of heating operation where the temperature difference from the room temperature Tn is large,
The iming control means 233 continuously performs the refrigerant circulation operation.
I, (Temperature Th₂-Temperature Th ₁= Predetermined value) is maintained
Similarly, the gas burner 13 burns (for example, the burning speed is 1 speed)
However, the combustion fan 16 has a low rotation speed suitable for the combustion speed.
Proportional valve control means 236 and combustion fan control so as to rotate
The means 235 controls.

When the temperature difference between the target room temperature Tt and the detected room temperature Tn becomes small with the passage of time, the timing control means 233 alternately performs a relatively long refrigerant circulation operation and a refrigerant stop operation. During the refrigerant circulation period, (temperature Th
₂ -The temperature Th ₁ = predetermined value) is maintained so that the gas burner 13 burns (for example, the combustion speed is 1 speed), and the combustion fan 16 rotates at a low rotation speed suitable for the combustion speed. The proportional valve control means 236 and the combustion fan control means 235 control.

The data of the temperature change of each part in the transient period of the air volume manual heating operation (7th speed of air volume → 4th speed of air volume → 7th speed of air volume) and the temperature of each part in the stable state (7th speed of air volume, 4th speed of air volume) FIG. 8 and Table 1 show the pressure data, and it was confirmed that the gas cooling and heating apparatus A operates stably.

[0058]

[Table 1]

The gas cooling and heating apparatus A of this embodiment has the following advantages. [A] The capacity of the compressor 1 is not changed and the gas burner 1 is operated during either operation of the air volume automatic heating operation and the air volume manual heating operation.
Since the heating capacity is increased / decreased by increasing / decreasing the combustion amount of No. 3 and the number of revolutions of the indoor fan 31, an inverter circuit for continuously varying the amount of electricity supplied to the compressor 1 is unnecessary. Therefore, it is not necessary to use expensive electronic parts,
The gas cooling and heating device A can be manufactured at low cost without the need to take measures against noise leakage or distortion of the power supply waveform (harmonics).

[A] The heating capacity control means 234 controls the temperature Th.
A predetermined value corresponding to ₁ is read from the memory 28 at every predetermined time τ, and the proportional valve control means 236 and the combustion fan control means 235 are proportional so that (temperature Th ₂ −temperature Th ₁ = predetermined value) is maintained. Opening degree of solenoid valve 14 and combustion fan 16
It is the structure which controls the number of rotations to stabilize the refrigeration cycle. Therefore, the refrigeration cycle can be stabilized by simple control, and the occurrence of problems such as damage to the compressor and damage to the refrigerant heater can be prevented.

[0061] Further, for each temperature Th ₁ in the memory 28, the predetermined value corresponding to the temperature Th ₁ (the temperature difference) are previously brought memorized, the temperature of the refrigerant sensor 26 arranged in the refrigerant heater 5 is detected The value of (Temperature Th ₂ −Temperature Th ₁ ) can be set to an optimum value according to Th _1, and the stability of the refrigeration cycle is excellent.

[C] During the refrigerant circulation operation, the compressor 1 is operated with a constant capacity, and the refrigerant is caused to flow at a predetermined flow rate at a predetermined speed. Therefore, regardless of whether the room temperature is high or low, the air volume automatic heating operation and the air volume are controlled. The start-up of heating is good at the start of either of the manual heating operations. When the number of airflow stages of the indoor fan 31 is increased during the airflow manual heating operation, the compressor 1 is operated at a constant capacity and the refrigerant flow operation in which the refrigerant flows at a predetermined flow rate at a constant speed is performed when the number of stages is switched. Since it is performed, it has excellent responsiveness of heating capacity.

[D] The temperature control is performed only by setting the set room temperature (the air volume of the indoor fan 31 is automatically controlled), the air volume automatic heating operation, and the set room temperature is set.
Any one of the air volume manual heating operation in which the air volume is manually set to control the temperature can be freely selected according to the preference of the user.

[Brief description of drawings]

FIG. 1 is a principle view of a refrigerant heating type gas cooling and heating device.

FIG. 2 is a block diagram of the gas cooling and heating device.

FIG. 3 is a graph illustrating the relationship between the passage rate of a refrigerant heater and the refrigerant temperature.

FIG. 4 is a Ph diagram showing a state change of a refrigerant used in the gas cooling and heating device.

FIG. 5 is a graph showing changes in elapsed time-room temperature and operating speed when the gas cooling and heating apparatus is operated by automatic air volume heating.

FIG. 6 is a graph showing elapsed time-room temperature change and refrigerant stop operation timing when the gas cooling / heating apparatus is operated by air volume manual heating operation (operation speed = 7 speed).

FIG. 7 is a graph showing elapsed time-room temperature change and refrigerant stop operation timing when the gas cooling / heating apparatus is operated in the air volume manual heating operation (operation speed = 1st speed).

FIG. 8 is a graph showing elapsed time-temperature change data of each part when the gas cooling / heating apparatus is operated by air volume manual heating.

FIG. 9 is an explanatory diagram for explaining a refrigeration cycle of the refrigerant heating type air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 3 Indoor unit side heat exchanger 5 Refrigerant heater 13 Gas burner (heating means) 21 Temperature setting device 22 Room temperature sensor 26 Temperature sensor (first temperature sensor) 27 Temperature sensor (second temperature sensor) 31 Indoor fan 231 Release Heat quantity calculation means 232 Indoor fan control means 233 Timing control means 234 Heating capacity control means

Claims (4)

[Claims] 1. A refrigerant flowing out from an indoor unit side heat exchanger is sent to a refrigerant heater, the refrigerant is evaporated in the refrigerant heater heated by a heating means, and a gas refrigerant carried out from the refrigerant heater has a constant capacity. Adiabatic compression by an operating compressor, and the high-temperature and high-pressure gas refrigerant discharged from the compressor is condensed in an indoor unit side heat exchanger with an indoor fan to radiate heat indoors to perform heating operation. 2nd temperature for detecting the temperature Th ₂ of a refrigerant in a superheated steam state, wherein a first temperature sensor for detecting the temperature Th ₁ of the refrigerant in a saturated state is arranged in the middle of the pipeline of the refrigerant heater, When the sensor is arranged between the outlet of the refrigerant heater and the inlet of the compressor to increase / decrease the heating capacity, the amount of air blown from the indoor fan is increased / decreased, and the temperature Th ₂ −the temperature Th is increased. ₁ is maintained at the specified value Refrigerant heating type cooling and heating device for controlling the heating amount of the heating means as described above. 2. The refrigerant flowing out from the indoor unit side heat exchanger is sent to the refrigerant heater, the refrigerant is evaporated in the refrigerant heater heated by the heating means, and the gas refrigerant carried out from the refrigerant heater is compressed by the compressor. A high-temperature high-pressure gas refrigerant that is adiabatically compressed and discharged from the compressor is condensed in an indoor unit-side heat exchanger equipped with an indoor fan whose air flow rate can be changed to radiate heat indoors to perform heating operation. It is a heating type air conditioner and a second temperature for detecting a temperature Th ₂ of a refrigerant in a superheated steam state, by disposing a first temperature sensor for detecting a refrigerant temperature Th ₁ in a saturated state in the middle of a pipeline of the refrigerant heater. A sensor is provided between the outlet of the refrigerant heater and the inlet of the compressor, and the compressor is operated at a constant capacity so that the temperature Th ₂ −the temperature Th ₁ is maintained at a predetermined value. , Each heating amount set according to the air flow rate Wherein the refrigerant flow operation for actuating the heating means, the refrigerant heating type air conditioning apparatus for carrying out alternately the refrigerant stops operation to stop the operation of at least the heating means. 3. A temperature setter for setting a target room temperature, a room temperature sensor for detecting the room temperature, and the indoor unit side heat exchanger discharges in the refrigerant condensing step based on the difference between the target room temperature and the detected room temperature. A heat radiation amount calculating means for calculating a necessary heat amount, an indoor fan control means for determining an air blowing amount of the indoor fan based on the calculated necessary heat amount, and controlling the indoor fan so as to obtain the air blowing amount; temperature Th ₂ - temperature Th ₁ is a refrigerant heating type air conditioning apparatus according to claim 1, wherein provided a heating capacity control means for controlling the heating amount of said heating means so as to be maintained at a predetermined value. 4. A temperature setter for setting a target room temperature, a room temperature sensor for detecting the room temperature, and timing control means for controlling the operation timing and time of the refrigerant stop operation so that the detected room temperature is maintained at the target room temperature. When the temperature Th ₂ - as the temperature Th ₁ is maintained at a predetermined value, the heating amount control means and the provided claims 2 refrigerant heating type according to control the heating amount of said heating means when the refrigerant flow operation Air conditioning system.