JPH0317471A - Air conditioner - Google Patents

Abstract

PURPOSE:To fall a room heating operation at room heating operation start setting time by so setting recovering operation starting time by a first setter as to end a recovering operation before setting time, and so setting preheat starting time by a second setter as to complete preheating of a heater. CONSTITUTION:An operation start after predetermined time is set by a timer time setter 27 in case of a room heating operation, and recovering operation starting time tS1 is set by a first setter 34. A first discriminator 35 compares present value (t) of a timer 33 with the tS1, and outputs an operation signal to a recovering operation unit 30 when the t exceeds the tS1. A calculator 36 calculates preheating time tH in response to the detection temperature Tg of temperature detecting means 20. Preheat starting time tS2 is set to a second setter 37 according to the calculated preheating time tH. A second discriminator 38 compares the present value (t) of the timer 33 with the tS2, and outputs a preheat start signal to a preheater 32 when the t exceeds the tS2. When the temperature of an evaporator 18 exceeds an evaporation possible temperature Tg, a third discriminator 38 output an operation signal to a room heating operation unit 30 to start driving of heat conveying means 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air conditioning device that connects indoor and outdoor units with refrigerant piping. This invention relates to an air conditioner that performs heating by transferring heat to a unit.

2. Description of the Related Art As an apparatus for heating and cooling indoor and outdoor units by connecting refrigerant piping, there is a system as shown in FIG. 5 in Japanese Patent Laid-Open No. 63-99467. That is, in Figure 5,
During heating operation, first, the first solenoid valve 1 and the second solenoid valve are turned on when heating starts.
The solenoid valve 2 and the on-off valve 3 are closed, the third solenoid valve 4 and the fourth solenoid valve 5 are opened, and the compression 816 is operated. First solenoid valve 1
Since the refrigerant line is sealed by the action of the second check valve 7, the refrigerant that has been distributed in the outdoor refrigerant condenser 8, accumulator 9, and various refrigerant pipes connected thereto is released from the operation of the compressor 6. All the refrigerant is pumped up to the refrigerant heater l1 via the first check valve lO. After this recovery operation, the pressure 'lmR6 is stopped, the fourth solenoid valve 5 is closed, and a burner (not shown) is ignited to start a heating operation. The refrigerant pumped into the refrigerant heater 11 is heated by a burner and evaporated, which increases the evaporation pressure, and the evaporated high temperature and high pressure refrigerant gas flows from the refrigerant heater 1l through the third solenoid valve 4 and the refrigerant pipe 12. It is fed under pressure to the indoor heat exchanger 13. At this time, when the indoor fan 14 is operated, the high-temperature, high-pressure refrigerant gas radiates heat and performs heating, thereby condensing and liquefying. The refrigerant liquid flows from the refrigerant pipe 15 through the third check valve 6 to the liquid receiver! 7 and receives the liquid. When the liquid level of the liquid receiver reaches a certain level, the on-off valve 3 is opened and evaporation pressure is applied to the liquid receiver 17, and in order to have the same static pressure as the refrigerant heater 11, the liquid receiver 17 is heated. Due to the liquid surface head differential pressure, the refrigerant liquid in the liquid receiver 17 is heated to the refrigerant heater 11.
flows into. After the liquid level in the liquid receiver 17 drops, the on-off valve 3 closes and returns to its initial state. As described above, during heating operation, the heating cycle is configured by pumping refrigerant gas using the increase in vapor pressure due to refrigerant heating and dropping refrigerant liquid using the liquid level head differential pressure, which is different from the conventional method. This system performs heating operation without requiring the operation of a compressor or pump using electricity.

By the way, some air conditioners are equipped with a timer function that automatically starts operation at a time set and input into a timer device by the user. In the above-mentioned air conditioner, if the operation start time is set using the timer function, when the set time comes, the refrigerant recovery operation by compressor operation will be automatically started.The invention is solved. However, in the above configuration, the refrigerant recovery operation is performed before the parna is ignited and the heating operation is started, so even if the operation start time is set with a timer,
The heating operation actually starts after the time from the set time to the end of the recovery operation has elapsed. Furthermore, some air conditioners of this type use combustion heat of liquid fuel such as petroleum as a heat source. In this case, the fuel is vaporized by a vaporization heater, but when this type of air conditioner is used early in the morning in a cold region such as Hokkaido, the temperature inside the vaporizer is considerably lower due to the outside air. Therefore, if you try to warm up the room by the time you wake up by running the timer, it will take a considerable amount of time to preheat the vaporizer, so the hot air will actually start rising much later than the set time. There was a problem with this. The present invention solves these problems, and aims to ensure that heating operation starts at a set time during timer operation.

Means for Solving the Problems In order to solve the above problems, the air conditioner of the present invention includes a heating device that heats a heat medium by combustion of liquid fuel, a vaporizer that vaporizes the liquid fuel, and a heating device that heats the vaporizer. a heater for heating the air, a temperature detection means for detecting the temperature inside the vaporizer, a heat transfer means for heating the air by circulating it in a heat exchanger that heats the air by heat exchange with a heat medium, and a heat transfer means for heating the air by circulating the heat medium in the heating device. a recovery means for recovering the heat, an "on" timer means for starting operation when a preset time has elapsed, and a control section for controlling the heater, the heat transfer means, and the recovery means; A recovery operation section that drives the recovery means for a predetermined period of time, a preheating section that controls energization of the heater based on the temperature detected by the temperature detection means, and a timer means that causes the recovery operation to end at a heating operation start time set by the timer means. a first setting section that sets a recovery operation start time; a first determination section that outputs an operation signal to the recovery operation section at the time set by the setting section; f4'K. which calculates the preheating time of the heater based on the temperature difference; a second setting section that sets a preheating start time for the heater based on the calculation result of the calculation section; and a second determination section that outputs a preheating start signal to the preheating section when the set time of the second setting section is exceeded. It is designed to have the following.

According to the above-mentioned system, the present invention sets the recovery operation start time so that when the heating operation start time is set by the "on" timer means, the recovery operation is finished before the set time, and the first setting section sets the recovery operation start time. Since the second setting unit sets the preheating start time so that the preheating of the heater is completed before the preheating time, the heating operation can be started at the heating operation start setting time.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In addition, in the embodiment, the same parts as those in FIG. FIG. 1 shows a system block diagram of the present invention.

6 is a heating device that heats a heat medium by burning liquid fuel;
18 is a vaporizer that vaporizes liquid fuel; 19 is a heater that heats the vaporizer; 20 is a temperature detection means that detects the temperature of the vaporizer l8; 8 is a heat exchanger that heats the air by heat exchange with a heat medium. 21 is a heating device 6 and a heat exchanger 8.
22 is a recovery means for recovering the heat medium to the heating device 6; 23 is a control unit for controlling the heater 19, the heat transfer means 21, and the recovery means 22;
FIG. 2 is an external view of an air conditioner operating device 24 with a timer function.

25 is the operation switch, and 26 is the timer mode switch, which turns on the timer operation and turns it off for the timer operation. Select either continuous operation or continuous operation. 27 is a timer time setting section for setting the timer operation time, 28 is a room temperature setting section, and 29 is an air volume setting section. FIG. 3 is a configuration diagram of the control section 23.
30 is a heating operation section that drives the heat transfer means 21; 31 is a recovery operation section that drives the recovery means 22; 32 is a preheating section that controls energization to the heater 19 based on the temperature detected by the temperature detection means 20; 33 is a timer operation. A timer that measures the elapsed time after setting; 34 a first setting unit that sets the collection operation start time based on the set time input in the timer time setting unit 27; and 35 a setting in which the measured value of the timer 33 is set in the first setting unit. A first determination section 36 outputs an operation signal to the recovery operation section 30 when the time comes, and the current value of the temperature detection stage 8 and the vaporizable temperature T.
A calculation section 37 calculates the preheating time of the heater 19 required to raise the vaporizer temperature to T, based on the difference between the temperature and temperature of the heater 19.
A second setting section 38 that sets the preheating start time is a second determining section that outputs a preheating start signal to the preheating section 32 when the measured value of the timer 33 becomes larger than the set time of the second setting section 37. Here, the flow of processing when heating operation is performed by the "on" timer means will be explained based on the flowchart of FIG. 4.

The user inputs operating conditions using the operating device 28. 28. Turn on the timer mode switch 26, set how many hours from now the operation will start using the timer time setting section 27, and 28. The operating conditions are sent to the control section 23 by setting the desired room temperature and air volume using 29 and turning on the operating switch 25. At this point, timer 33 starts. The time set in 27 is t,. , How long does the recovery operation take? When p is set, the first setting unit 34 sets the collection operation start time t■-L. -t, is set. First determination unit 35
compares the current value L of the timer 33 with t■, and finds that t is t■
An operation signal is output to the recovery operation section 30 when the
The recovery operation section 30 stops the recovery operation after a predetermined operation time has ended. The calculation unit 36 calculates the detected temperature T. The preheating time t is calculated as follows.

That is, since it is considered that the temperature increase gradient when electricity is applied to the heater 19 with combustion stopped is almost constant, the current detected temperature of the temperature detection means 20 is set to T. , the vaporizable temperature is T, and the temperature increase gradient is K, then 1. =(T
．． Ts)/K. Preheating time calculated here 1. The second setting unit 37 sets the preheating start time tst=1. . -1.
is set. Since the temperature inside the vaporizer is changing with time, t8 and t depending on the fixed sampling time. will be updated. The second determination unit 38 compares the current value t of the timer 33 with tsz, and outputs a preheating start signal to the preheating unit 32 when t exceeds tsx. When the preheating section 32 starts energizing the heater 19, it continues to energize the heater 19 until the temperature of the vaporizer 18 exceeds the vaporization temperature T. After exceeding this temperature, the start and stop of energization is repeated according to the temperature detected by the temperature detection means 20 so that the temperature inside the vaporizer maintains the temperature at which vaporization is possible. After the start of preheating, the calculation unit 36 and the second setting unit 37 do not update L8tsz. After completing the recovery operation for a predetermined time, when the temperature of the vaporizer for one day exceeds the vaporization temperature T, the third determination unit 3
9, an operation signal is output to the heating operation unit 30, and the drive of the heat transfer means 21 is started. As described above, since the recovery operation and preheating are started before the heating operation start time set by the controller 28, the heating operation can be started at the originally set time. Effects of the Invention As described above, the air conditioner of the present invention provides the following effects. (1) When performing heating operation using the “on” timer operation, the heat medium recovery operation has already been completed at the time set to start operation, so ensure that there is a sufficient amount of heat medium in the heating device. Heating operation can be performed. (2) The time to start preheating the heater is set before the set time to start operation, and it is changed according to the detected temperature of the vaporizer, so the start time of heating operation is determined without being affected by the temperature of the vaporizer. At the same time, it is possible to reduce the amount of power consumed by energizing the heater.

[Brief explanation of drawings]

Fig. 1 is a circuit configuration diagram of an air conditioner according to an embodiment of the present invention, Fig. 2 is an external view of the operating section, Fig. 3 is a configuration diagram of the control section, and Fig. 4 is a diagram of the control section. Figure 5 is a flowchart showing the flow of timer operation control, and is a circuit diagram of a conventional air conditioner. 6... Heating device, 8... Heat exchanger, 1
8... Carburizer, 19... Heater, 2
0...Temperature detection means, 21...Heat transport means, 22...Recovery means, 23...Control unit, 31...Recovery Driving Department, 32...
Preheating section, 34...First setting section, 35...
・First judgment section, 36... Calculation section, 37...
. . . 2nd setting section, 38 . . . 2nd judgment section. Figure 2 Figure 25 Figure 4

Claims (1)

[Claims] a heating device that heats a heat medium by burning liquid fuel;
A vaporizer that vaporizes liquid fuel, a heater that heats the vaporizer, a temperature detection means that detects the temperature inside the vaporizer, and a heat exchanger that heats air by heat exchange with the heat medium. a heat transfer means that circulates and performs heating, a recovery means that recovers the heat medium to the heating device, an "on" timer means that starts operation when a preset time has elapsed, and the heater and the heat transfer means. a control unit that controls the recovery means; the control unit includes a recovery operation unit that drives the recovery unit for a predetermined period of time; a preheating unit that controls energization of the heater based on the temperature detected by the temperature detection unit; a first setting section that sets a recovery operation start time so as to end the recovery operation at the heating operation start time set by a timer means; and an operation signal that outputs an operation signal to the recovery operation section at the time set by the first setting section. a first determination section, a calculation section that calculates the preheating time of the heater based on the temperature difference between the temperature detected by the temperature detection means and the vaporizable temperature, and a calculation section that calculates the preheating time of the heater based on the calculation result of the calculation section; An air conditioner comprising: a second setting section; and a second determination section that outputs a preheating start signal to the preheating section when the set time of the second setting section is exceeded.