JPH07310945A - Refrigerant heating type cooler/heater - Google Patents

Abstract

PURPOSE:To improve the response at the times of starting heating and altering the heating capacity and to reduce the cost of a refrigerant heating type cooler/ heater by increasing or decreasing the heating amount of heating means and the air flow rate of an indoor fan to control the capacity in the state that the current-carrying capacity to a motor-driven compressor is maintained constant. CONSTITUTION:The combustion quantity of a gas burner 13 and the number of revolutions of an indoor fan 31 are increased or decreased to increase or decrease the heating capacity in the state that the current-carrying capacity to a compressor 1 is maintained constant at the time of any of the automatic air flow rate heating operation and the manual air flow rate heating operation. Combustion fan control means so controls to feed back a combustion fan 16 that the fan 16 is rotated at the number of revolutions set in response to a set (fixed) air flow rate during the refrigerant flowing operation, i.e., in the state that the current-carrying capacity to the compressor 1 is maintained constant. The control means rotates the fan 16 in a predetermined pattern during the refrigerant stopping operation, i.e., when the flow of the refrigerant is stopped in the state that the energization of the compressor 1 is stopped.

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, an electric compressor 1-> an outdoor unit side heat exchanger 7-> a first check valve 8-> a capillary tube 9->
The indoor unit side heat exchanger 3-> the second check valve 10-> the accumulator 6-> the electric compressor 1 is circulated in order to perform cooling operation, and the electric compressor 1-> indoor unit side heat exchanger 3-> refrigerant heater BACKGROUND ART Refrigerant heating type cooling and heating devices that perform heating operation by circulating a refrigerant in the order of 5 → accumulator 6 → compressor 1 have been conventionally known.

[0003]

The conventional refrigerant heating type cooling / heating apparatus has the following problems because the heating capacity is increased / decreased by continuously varying the compression capacity of the electric compressor and changing the refrigerant flow rate.

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

(Ii) If the flow rate or speed of the refrigerant is suddenly changed, the refrigeration cycle becomes unstable. Therefore, it is necessary to gradually bring the number of rotations of the electric compressor closer to the target value, and the heating rise is poor. The response when changing the heating capacity is also poor.

An object of the present invention is to provide an inexpensive refrigerant heating type cooling / heating apparatus which has a good start-up of heating and an excellent responsiveness when the heating capacity is changed.

[0007]

[Means for Solving the Problems] In order to solve the above problems,
The present invention has 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 is transferred by the electric compressor. In a refrigerant heating type cooling and heating apparatus that performs adiabatic compression and discharges the high-temperature and high-pressure gas refrigerant from the electric compressor in the indoor unit side heat exchanger equipped with an indoor fan to radiate heat indoors to perform heating operation The heating capacity is controlled by increasing / decreasing the heating amount of the heating unit and the blowing amount of the indoor fan in a state where the amount of electricity supplied to the electric compressor is kept constant.

(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 electrically driven. A refrigerant heating type that performs adiabatic compression with a compressor and radiates heat into the room by condensing the high-temperature and high-pressure gas refrigerant discharged from the electric compressor in an indoor unit side heat exchanger equipped with an indoor fan In the cooling and heating device, when the amount of air blown to the indoor unit side heat exchanger of the indoor fan is determined in one or more stages, the amount of air blown to the air blower is kept constant while the amount of electricity supplied to the electric compressor is kept constant. The heating capacity is controlled by alternately performing the refrigerant circulation operation for operating the heating means with each heating amount set accordingly and the refrigerant stop operation for stopping the operation of at least the heating means.

(3) A temperature setting device having the structure of (1) above, which sets a target room temperature, a room temperature sensor for detecting the room temperature,
Based on the difference between the target room temperature and the detected room temperature, 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 indoor unit in proportion to the calculated necessary heat amount. Indoor fan control means for determining the air flow rate of the fan and controlling the indoor fan so as to obtain the air flow rate;
A heating capacity control means for outputting the heating quantity corresponding to the calculated necessary heat quantity or the heat quantity radiated by the indoor unit side heat exchanger to the heating means in the refrigerant evaporation step is provided.

(4) A temperature setting device having the structure of (2) above, which sets a target room temperature, a room temperature sensor for detecting the room temperature,
Based on the difference between the target room temperature and the detected room temperature, 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 condensation step, and the heating amount corresponding to the calculated necessary heat amount, Alternatively, a timing control means for controlling the operation timing and time of the refrigerant stop operation is provided so that the heating means outputs the amount of heat radiated by the indoor unit side heat exchanger in the refrigerant evaporation step.

(5) Having the structure of (3) above, the heating means is a gas burner to which gas is supplied through a proportional solenoid valve showing an opening corresponding to the amount of energization, and an appropriate amount of combustion gas for burning the gas burner. A combustion fan that supplies air, and the energization amount to the proportional solenoid valve and the rotation speed of the combustion fan are controlled by the heating capacity control unit, and the indoor fan control unit is proportional to the calculated required heat amount. Then, the rotation speed of the indoor fan is determined, and the indoor fan is controlled so as to obtain the rotation speed.

[0012]

[Action]

[Claim 1] The electric compressor compresses the gas refrigerant carried out from the refrigerant heater, the temperature and the pressure of the refrigerant increase due to adiabatic compression, and the gas refrigerant changes from the state of Fig. 8 to a state along the isentropic line. It is displaced and the enthalpy rises slightly (adiabatic compression process).

The high-temperature high-pressure gas refrigerant discharged from the electric compressor is displaced from the state shown in FIG. 8 to a state along the isothermal isobar, and is condensed in the indoor unit heat exchanger, and the indoor unit heat exchanger is condensed. The heat generated by the 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. 8 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. 8 to a state along the isothermal isobar, and the enthalpy of the refrigerant increases (refrigerant evaporation step).

The heating capacity is controlled as follows. When the heating amount of the heating means and the blowing amount of the indoor fan are increased while the amount of electricity to the electric compressor is maintained constant, the change width of the enthalpy of the refrigerant in the refrigerant evaporation process and the heat exchange on the indoor unit side in the refrigerant condensation process The amount of heat radiated into the room increases, and the heating capacity increases (state → state → state → state → state ...).

Further, when the heating amount of the heating means and the air blowing amount of the indoor fan are reduced in a state where the amount of electricity supplied to the electric compressor is kept constant, the change width of the enthalpy of the refrigerant in the refrigerant evaporation process and the refrigerant condensing process are reduced. Both the amount of heat radiated to the room from the indoor unit side heat exchanger decreases, and the heating capacity decreases (state → state → state '→ state' → state ...
…).

[Claim 2] In the case of the refrigerant heating type cooling and heating apparatus in which the wind force of the indoor fan is fixed, the heating capacity is controlled as follows. When the amount of electricity supplied to the electric compressor is maintained constant and the heating means is operated at each heating amount set according to the air flow rate (a constant value set for each air flow rate),
The high-temperature and high-pressure gas refrigerant condenses in the indoor unit side heat exchanger, and the indoor unit side heat exchanger radiates heat indoors (refrigerant circulation operation).

At least when the operation of the heating means is stopped,
The indoor heat exchanger does not release heat to the room, or the heat is significantly reduced (refrigerant stop operation). The heating capacity is increased / decreased by changing the timing and duration of this refrigerant stop operation.

[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 proportion to the calculated required heat amount, and controls the indoor fan so as to obtain the amount of air blown. The heating capacity control means causes the heating means to output the heating amount corresponding to the calculated required heat amount or the heat amount radiated by the indoor unit side heat exchanger in the refrigerant evaporation step. As a result, the heating operation is performed so that the room temperature is maintained at the target room temperature.

[Claim 4] 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 timing control means is arranged so that the heating means outputs the heating amount corresponding to the required heat amount calculated by the heat radiation amount calculating means or the heat amount radiated by the indoor unit side heat exchanger in the above-mentioned refrigerant evaporation step. Control the timing and duration of the refrigerant stop operation. As a result, the heating operation is performed so that the room temperature is maintained at the target room temperature.

[Claim 5] 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 number of revolutions of the indoor fan in proportion to the calculated necessary heat amount, and controls the number of revolutions of the indoor fan so as to obtain the number of revolutions. Heating capacity control means, the amount of heat equivalent to the calculated required heat amount, or the heat amount radiated by the indoor unit side heat exchanger in the refrigerant evaporation step,
The power supply to the proportional solenoid valve and the rotation speed of the combustion fan are controlled so that the gas burner outputs. As a result, the heating operation is performed so that the room temperature is maintained at the target room temperature.

[0026]

【The invention's effect】

[Claim 1] Since the amount of electricity to the electric compressor is maintained constant, and the heating capacity is increased or decreased by increasing or decreasing the heating amount of the heating means and the blowing amount of the indoor fan, An inverter circuit for continuously changing the energization amount becomes unnecessary. For this reason, 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 can be manufactured at low cost.

Maintaining a constant amount of electricity to the electric compressor,
Since the refrigerant is constantly flowing at 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] A refrigerant which maintains a constant amount of electricity to the electric compressor and operates the heating means at each heating amount set according to the blowing amount of the indoor fan, which is fixed or can be changed in a plurality of stages. The heating capacity is controlled by alternately performing a circulation operation and at least a refrigerant stop operation for stopping the operation of the heating means.

Therefore, an inverter circuit for continuously varying the amount of electricity supplied to the electric compressor is not required, and it is not necessary to use expensive electronic parts, and noise leakage and power waveform distortion (harmonics) are prevented. It is possible to manufacture at low cost without the need to perform the above.

Even when the heating is started up or when the heating capacity is switched to the increasing side (when the wind force sent from the indoor fan is switched to the increasing side), the amount of electricity supplied to the electric compressor is kept constant and the refrigerant is kept at a predetermined level. Since a predetermined flow rate is flown at the speed of, the heating starts up well and the responsiveness when changing the heating capacity is excellent.

[Claim 3] When the user sets the target room temperature with the temperature setting device, the amount of air blown by the indoor fan and the heating amount of the heating means are automatically determined, and heating is performed so that the room temperature is maintained at the target room temperature. You can drive.

[Claim 4] When the target room temperature is set by the temperature setting device and the user determines the air flow rate of the indoor fan,
The control means controls the operation timing and time of the refrigerant stop operation, and the heating operation can be performed so that the room temperature is maintained at the target room temperature.

[Claim 5] When the user sets the target room temperature with the temperature setting device, the rotation speed of the indoor fan, the opening degree of the proportional solenoid valve (combustion amount of the gas burner) and the rotation speed of the combustion fan are automatically adjusted. After that, the heating operation can be performed so that the room temperature is maintained at the target room temperature.

[0034]

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
→ First check valve 8 → Capillary tube 9 → Indoor unit side heat exchanger 3 → Four-way valve 2 → Second check valve 10 → Accumulator 6 → Compressor 1 .

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 "opened" while the compressor 1 is stopped during the heating operation and when the low pressure is 17 kgcm ² G or more, 13
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 room temperature sensor 22 for detecting a room temperature, a heat radiation amount calculation means 231, an indoor fan control means 232, a combustion fan control means 233 which is a heating capacity control means, and a proportional valve control means 2.
34, controller 23 having timing control means 235, etc.
And an operation mode setter 24.

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 the accumulator 6. Adiabatically compress the refrigerant.
The compressor 1 may be a scroll type or a reciprocating type.

The four-way valve 2 is a solenoid 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 arrow in FIG. 1, and during the cooling operation as shown by the broken line arrow. Is formed.

The indoor unit side heat exchanger 3 is a meandering pipe line 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 a meandering heat absorption tube, 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 proportional solenoid valve 14 and the combustion air supplied by the combustion fan 16 are mixed and combusted compulsorily.

The accumulator 6 comprises a straight-tube refrigerant gas inlet pipe and a substantially U-shaped refrigerant gas outlet pipe having an opening at the top thereof, 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. 3 to the state 18 (superheated vapor state) along the isentropic 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 vapor → 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 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 1st air volume to 8th air volume; corresponding to claims 1, 3 and 5)] Mode setter 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. 3) 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 for every predetermined time τ (for example, every 1 minute) in proportion to the calculated required heat amount Q, and the step 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 combustion fan control means 233 outputs a heating amount corresponding to the calculated required heat amount Q in the refrigerant evaporation process (corresponding to state 20 → state 17 in FIG. 3) for combustion suitable for the combustion amount of the gas burner 13. The number of revolutions at which the amount of air is obtained is determined for each predetermined time τ, and the combustion fan 16 is controlled so as to reach the number of revolutions.

The proportional valve control means 234 supplies a heating amount corresponding to the calculated required heat amount Q to the refrigerant evaporation step (state 2 in FIG. 3).
In order to output to the gas burner 13 in 0 → corresponding to the state 17), the energization amount to the proportional solenoid valve 14 is controlled based on the detected rotation speed every predetermined time τ.

Specifically, as shown in FIG. 4, 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 eighth speed, and the combustion fan control unit 233 determines the combustion fan 16. The proportional valve control means 234 determines the combustion speed of the gas burner 13 to be 8th speed (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 are reduced.

[Air volume manual heating operation (air volume 1st, 4th, 7th
Speed; corresponding to claims 2 and 4)] Mode setter 24
Then, when the air volume manual heating operation (with temperature control) is set and the air volume is fixed to the predetermined air volume (any of the air volume of 1st speed, 4th speed, and 7th speed) by the air volume manual switching device 25, the heat radiation amount calculation means 231 Temperature difference between detected room temperature Tn, target room temperature Tt and detected room temperature Tn (Tt
-Tn), the heat quantity Q required for the indoor unit side heat exchanger 3 to release in the refrigerant condensing step (corresponding to state 18 → state 19 in FIG. 3) is given every τ (for example, every 1 minute). Calculate to.

The combustion fan control means 233 operates at a rotation speed set according to the set air volume (fixed) during the refrigerant circulation operation (a state in which the refrigerant is circulated while the amount of electricity to the compressor 1 is kept constant). The combustion fan 16 is feedback-controlled so that the combustion fan 16 rotates. Further, during the refrigerant stop operation (the state in which the flow of the refrigerant is stopped while the energization of the compressor 1 is stopped), the combustion fan 16 is rotated at a low speed in a predetermined pattern.

The proportional valve control means 234 controls the proportional solenoid valve 14 at predetermined intervals based on the detected rotational speed so that the gas burner 13 burns at a combustion amount set according to the set air volume (fixed) during the refrigerant circulation operation. Determine the amount of electricity to the. Further, during the refrigerant stop operation, the power supply to the proportional solenoid valve 14 is stopped.

The timing control means 235 operates in the refrigerant stop operation so that the gas burner 13 outputs the heating amount corresponding to the calculated required heat amount Q in the refrigerant evaporation step (corresponding to state 20 → state 17 in FIG. 3). Control timing and duration.

Specifically, as shown in FIG. 5, 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 heating operation in which the temperature difference between t and the detected room temperature Tn, that is, the required heat quantity Q is large, the gas burner 13 burns at a combustion speed of 7 speeds, and the combustion fan 16 operates at a high rotation speed suitable for a combustion speed of 7 speeds. It rotates and the timing control means 235 continues a refrigerant circulation operation.

When the required heat quantity Q decreases with the passage of time, the timing control means 235 causes the timing control means 235 to perform a short-time refrigerant flow operation (the combustion speed of the gas burner 13 is 7 speeds, and the rotation speed of the combustion fan 16 is 7 speeds). ) And the refrigerant stop operation for a relatively long time are alternately performed.

Further, as shown in FIG. 6, when the air volume of the indoor fan 31 is fixed to 1st speed (light wind), the temperature difference between the target room temperature Tt and the detected room temperature Tn, that is, the required heat quantity Q is large at the beginning of the heating operation. , The gas burner 13 burns at a burning speed of 1,
The combustion fan 16 rotates at a low rotation speed suitable for the first combustion speed, and the timing control means 235 continues the refrigerant circulation operation. When the required heat quantity Q becomes smaller with the passage of time, the timing control means 235 causes the timing control means 235 to perform a refrigerant circulation operation for a time longer than the 7th speed airflow (the combustion speed of the gas burner 13 is 1 speed, and the rotation speed of the combustion fan 16 is 1 speed Speed) and the refrigerant stop operation are alternately performed.

The data of the temperature change of each part in the transitional 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 a stable state (7th speed of air volume, 4th speed of air volume) The pressure data are shown in FIG. 7 and Table 1, and it was confirmed that the gas cooling and heating apparatus A operates stably.

[0064]

[Table 1]

The gas cooling / 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 configuration is such that the heating capacity is increased / decreased by increasing / decreasing the combustion amount of No. 3 and the rotation speed of the indoor fan 31, an inverter circuit for continuously varying the energization amount to the compressor 1 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), etc., and the gas cooling and heating apparatus A can be manufactured at low cost.

[A] Since the amount of electricity supplied to the compressor 1 is maintained constant and the refrigerant is supplied at a predetermined flow rate at a predetermined speed, either operation of the air volume automatic heating operation and the air volume manual heating operation is started. Even in the case of heating, the rise of heating is good. Further, in the air volume manual heating operation, when the number of air flow stages of the indoor fan 31 is increased, the amount of electricity supplied to the compressor 1 is maintained constant and the refrigerant flow operation in which the refrigerant flows at a predetermined flow rate at a predetermined speed. Therefore, the responsiveness of the heating capacity is excellent.

[C] 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 are set, and the air volume of the indoor fan 31 is manually set. One of the air volume manual operation for temperature control by
It can be freely selected according to the preference of the user.

In the above embodiment, the air flow rate of the combustion fan 16 and the combustion quantity of the gas burner 13 are determined based on the temperature difference (Tt-Tn) between the target room temperature Tt and the detected room temperature Tn. The heat radiation amount of the indoor unit side heat exchanger 3 in the refrigerant condensing process is calculated from the detected temperature Tn, the air flow rate of the indoor fan 31, the temperature of the indoor unit side heat exchanger 3, etc., and the combustion fan 16 of the combustion fan 16 is calculated based on the heat radiation amount. Air volume and gas burner 13
You may make it determine the combustion amount of.

[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 Ph diagram showing a state change of a refrigerant used in the gas cooling and heating apparatus.

FIG. 4 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. 5 is a graph showing the elapsed time-room temperature change and refrigerant stop operation timing when the gas cooling and heating apparatus is in the air volume manual heating operation (operating speed = 7th speed).

FIG. 6 is a graph showing the elapsed time-room temperature change and refrigerant stop operation timing when the gas cooling and heating apparatus is in the air volume manual heating operation (operation speed = 1st speed).

FIG. 7 is a graph showing elapsed time-temperature change data of each part when the gas cooling and heating apparatus is operated by air volume manual heating.

FIG. 8 is an explanatory diagram for explaining a refrigerating cycle of the refrigerant heating type air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor (electric compressor) 3 Indoor unit side heat exchanger 5 Refrigerant heater 13 Gas burner (heating means) 14 Proportional solenoid valve 16 Combustion fan 21 Temperature setting device 22 Room temperature sensor 31 Indoor fan 231 Heat dissipation amount calculation means 232 Indoor fan Control means 233 Combustion fan control means (heating capacity control means) 234 Proportional valve control means (heating capacity control means) 235 Timing control means

Claims (5)

[Claims] 1. A refrigerant flowing out of 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 is electrically compressed. A high-temperature high-pressure gas refrigerant that is adiabatically compressed by a compressor and discharged from the electric compressor is condensed in an indoor unit heat exchanger equipped with an indoor fan to radiate heat indoors to perform heating operation. In the device, a refrigerant heating type heating / cooling device characterized in that the heating capacity is controlled by increasing / decreasing the heating amount of the heating means and the blowing amount of the indoor fan in a state where the amount of electricity supplied to the electric compressor is kept constant. apparatus. 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 electrically compressed. A high-temperature high-pressure gas refrigerant that is adiabatically compressed by a compressor and discharged from the electric compressor is condensed in an indoor unit heat exchanger equipped with an indoor fan to radiate heat indoors to perform heating operation. In the device, when the amount of air blown to the indoor unit side heat exchanger of the indoor fan is determined in one or more stages, depending on the amount of air blown in a state where the amount of electricity supplied to the electric compressor is maintained constant. Refrigerant heating characterized by controlling the heating capacity by alternately performing a refrigerant circulation operation for operating the heating means at each heating amount set by the above and at least a refrigerant stop operation for stopping the operation of the heating means. Cold Heating system. 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 in proportion to the calculated necessary heat amount, and controlling the indoor fan so as to obtain the air blowing amount; The heating capacity control means for outputting the heating quantity corresponding to the calculated required heat quantity or the heat quantity radiated by the indoor unit side heat exchanger to the heating means in the refrigerant evaporation step. Refrigerant heating type air conditioner. 4. The temperature setter for setting the target room temperature, the room temperature sensor for detecting the room temperature, and the indoor unit side heat exchanger discharging in the refrigerant condensing step based on the difference between the target room temperature and the detected room temperature. The heat radiation amount calculation means for calculating the necessary heat amount to be calculated, the heating amount corresponding to the calculated necessary heat amount, or the heat amount radiated by the indoor unit side heat exchanger is output by the heating means in the refrigerant evaporation step described above. 3. The refrigerant heating type cooling and heating apparatus according to claim 2, further comprising a timing control means for controlling the operation timing and time of the refrigerant stop operation. 5. The heating means is composed of a gas burner to which gas is supplied via a proportional solenoid valve showing an opening degree according to an energization amount, and a combustion fan to supply an appropriate amount of combustion air to the gas burner, The energization amount to the proportional solenoid valve and the rotation speed of the combustion fan are controlled by the heating capacity control means, the indoor fan control means determines the rotation speed of the indoor fan in proportion to the calculated required heat amount, The refrigerant heating and cooling apparatus according to claim 3, wherein the indoor fan is controlled so as to obtain the rotation speed.